iOS Native Share Extension (Swift) (#2575)

* iOS Native Share Extension (Swift)

* Re-arrange files

* Fix .gitignore

NOTICE.txt

@@ -2086,43 +2086,6 @@ SOFTWARE.
 
 ---
 
-## react-native-tableview
-
-This product contains 'react-native-tableview' by Pavlo Aksonov.
-
-Native iOS TableView wrapper for React Native
-
-* HOMEPAGE:
-  * https://github.com/aksonov/react-native-tableview#readme
-
-* LICENSE: BSD-2-Clause
-
-Copyright (c) 2015, aksonov
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
----
-
 ## react-native-vector-icons
 
 This product contains 'react-native-vector-icons' by Joel Arvidsson.

app/components/file_attachment_list/file_attachment_document.js

@@ -25,8 +25,6 @@ import {DeviceTypes} from 'app/constants/';
 import mattermostBucket from 'app/mattermost_bucket';
 import {changeOpacity} from 'app/utils/theme';
 
-import LocalConfig from 'assets/config';
-
 import FileAttachmentIcon from './file_attachment_icon';
 
 const {DOCUMENTS_PATH} = DeviceTypes;
@@ -114,7 +112,7 @@ export default class FileAttachmentDocument extends PureComponent {
         this.setState({didCancel: false});
 
         try {
-            const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+            const certificate = await mattermostBucket.getPreference('cert');
             const isDir = await RNFetchBlob.fs.isDir(DOCUMENTS_PATH);
             if (!isDir) {
                 try {

app/components/file_upload_preview/file_upload_item/file_upload_item.js

@@ -15,7 +15,6 @@ import FileUploadRetry from 'app/components/file_upload_preview/file_upload_retr
 import FileUploadRemove from 'app/components/file_upload_preview/file_upload_remove';
 import mattermostBucket from 'app/mattermost_bucket';
 import {buildFileUploadData, encodeHeaderURIStringToUTF8} from 'app/utils/file';
-import LocalConfig from 'assets/config';
 
 export default class FileUploadItem extends PureComponent {
     static propTypes = {
@@ -137,7 +136,7 @@ export default class FileUploadItem extends PureComponent {
 
         Client4.trackEvent('api', 'api_files_upload');
 
-        const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+        const certificate = await mattermostBucket.getPreference('cert');
         const options = {
             timeout: 10000,
             certificate,

app/components/network_indicator/network_indicator.js

@@ -22,7 +22,6 @@ import mattermostBucket from 'app/mattermost_bucket';
 import PushNotifications from 'app/push_notifications';
 import networkConnectionListener, {checkConnection} from 'app/utils/network';
 import {t} from 'app/utils/i18n';
-import LocalConfig from 'assets/config';
 
 import {RequestStatus} from 'mattermost-redux/constants';
 
@@ -293,7 +292,7 @@ export default class NetworkIndicator extends PureComponent {
         const platform = Platform.OS;
         let certificate = null;
         if (platform === 'ios') {
-            certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+            certificate = await mattermostBucket.getPreference('cert');
         }
 
         initWebSocket(platform, null, null, null, {certificate, forceConnection: true}).catch(() => {

app/fetch_preconfig.js

@@ -130,7 +130,7 @@ Client4.doFetchWithResponse = async (url, options) => {
 const initFetchConfig = async () => {
     let fetchConfig = {};
     if (Platform.OS === 'ios') {
-        const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+        const certificate = await mattermostBucket.getPreference('cert');
         fetchConfig = {
             auto: true,
             certificate,

app/mattermost.js

@@ -322,7 +322,7 @@ const handleAuthentication = async (vendor) => {
     const translations = app.getTranslations();
     if (isSecured) {
         try {
-            mattermostBucket.setPreference('emm', vendor, LocalConfig.AppGroupId);
+            mattermostBucket.setPreference('emm', vendor);
             await mattermostManaged.authenticate({
                 reason: translations[t('mobile.managed.secured_by')].replace('{vendor}', vendor),
                 fallbackToPasscode: true,

app/mattermost_bucket/index.js

@@ -4,17 +4,17 @@
 import {NativeModules, Platform} from 'react-native';
 
 // TODO: Remove platform specific once android is implemented
-const MattermostBucket = Platform.OS === 'ios' ? NativeModules.MattermostBucket : null;
+const MattermostBucket = Platform.OS === 'ios' ? NativeModules.MattermostBucketModule : null;
 
 export default {
-    setPreference: (key, value, groupName) => {
+    setPreference: (key, value) => {
         if (MattermostBucket) {
-            MattermostBucket.setPreference(key, value, groupName);
+            MattermostBucket.setPreference(key, value);
         }
     },
-    getPreference: async (key, groupName) => {
+    getPreference: async (key) => {
         if (MattermostBucket) {
-            const value = await MattermostBucket.getPreference(key, groupName);
+            const value = await MattermostBucket.getPreference(key);
             if (value) {
                 try {
                     return JSON.parse(value);
@@ -26,19 +26,19 @@ export default {
 
         return null;
     },
-    removePreference: (key, groupName) => {
+    removePreference: (key) => {
         if (MattermostBucket) {
-            MattermostBucket.removePreference(key, groupName);
+            MattermostBucket.removePreference(key);
         }
     },
-    writeToFile: (fileName, content, groupName) => {
+    writeToFile: (fileName, content) => {
         if (MattermostBucket) {
-            MattermostBucket.writeToFile(fileName, content, groupName);
+            MattermostBucket.writeToFile(fileName, content);
         }
     },
-    readFromFile: async (fileName, groupName) => {
+    readFromFile: async (fileName) => {
         if (MattermostBucket) {
-            const value = await MattermostBucket.readFromFile(fileName, groupName);
+            const value = await MattermostBucket.readFromFile(fileName);
             if (value) {
                 try {
                     return JSON.parse(value);
@@ -50,9 +50,9 @@ export default {
 
         return null;
     },
-    removeFile: (fileName, groupName) => {
+    removeFile: (fileName) => {
         if (MattermostBucket) {
-            MattermostBucket.removeFile(fileName, groupName);
+            MattermostBucket.removeFile(fileName);
         }
     },
 };

app/screens/edit_profile/edit_profile.js

@@ -24,7 +24,7 @@ import StatusBar from 'app/components/status_bar/index';
 import ProfilePictureButton from 'app/components/profile_picture_button';
 import ProfilePicture from 'app/components/profile_picture';
 import mattermostBucket from 'app/mattermost_bucket';
-import LocalConfig from 'assets/config';
+
 import {getFormattedFileSize} from 'mattermost-redux/utils/file_utils';
 
 const MAX_SIZE = 20 * 1024 * 1024;
@@ -235,7 +235,7 @@ export default class EditProfile extends PureComponent {
             type: fileData.type,
         };
 
-        const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+        const certificate = await mattermostBucket.getPreference('cert');
         const options = {
             timeout: 10000,
             certificate,

app/screens/image_preview/downloader.ios.js

@@ -16,8 +16,6 @@ import mattermostBucket from 'app/mattermost_bucket';
 import {getLocalFilePathFromFile} from 'app/utils/file';
 import {emptyFunction} from 'app/utils/general';
 
-import LocalConfig from 'assets/config';
-
 import DownloaderBottomContent from './downloader_bottom_content.js';
 
 const {View: AnimatedView} = Animated;
@@ -236,7 +234,7 @@ export default class Downloader extends PureComponent {
                 this.setState({didCancel: false});
             }
 
-            const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+            const certificate = await mattermostBucket.getPreference('cert');
             const imageUrl = Client4.getFileUrl(data.id);
             const options = {
                 session: data.id,

app/screens/select_server/select_server.js

@@ -187,7 +187,7 @@ export default class SelectServer extends PureComponent {
         if (LocalConfig.ExperimentalClientSideCertEnable && Platform.OS === 'ios') {
             RNFetchBlob.cba.selectCertificate((certificate) => {
                 if (certificate) {
-                    mattermostBucket.setPreference('cert', certificate, LocalConfig.AppGroupId);
+                    mattermostBucket.setPreference('cert', certificate);
                     window.fetch = new RNFetchBlob.polyfill.Fetch({
                         auto: true,
                         certificate,
@@ -377,7 +377,7 @@ export default class SelectServer extends PureComponent {
         const url = this.getUrl();
         RNFetchBlob.cba.selectCertificate((certificate) => {
             if (certificate) {
-                mattermostBucket.setPreference('cert', certificate, LocalConfig.AppGroupId);
+                mattermostBucket.setPreference('cert', certificate);
                 fetchConfig().then(() => {
                     this.pingServer(url, true);
                 });

app/store/index.js

@@ -19,7 +19,6 @@ import {getSiteUrl, setSiteUrl} from 'app/utils/image_cache_manager';
 import {createSentryMiddleware} from 'app/utils/sentry/middleware';
 
 import mattermostBucket from 'app/mattermost_bucket';
-import Config from 'assets/config';
 
 import {messageRetention} from './middleware';
 import {createThunkMiddleware} from './thunk';
@@ -181,7 +180,7 @@ export default function configureAppStore(initialState) {
                                 profilesNotInChannel: [],
                             },
                         };
-                        mattermostBucket.writeToFile('entities', JSON.stringify(entities), Config.AppGroupId);
+                        mattermostBucket.writeToFile('entities', JSON.stringify(entities));
                     }
                 }, 1000));
             }
@@ -216,9 +215,9 @@ export default function configureAppStore(initialState) {
                     ]));
 
                     // When logging out remove the data stored in the bucket
-                    mattermostBucket.removePreference('cert', Config.AppGroupId);
-                    mattermostBucket.removePreference('emm', Config.AppGroupId);
-                    mattermostBucket.removeFile('entities', Config.AppGroupId);
+                    mattermostBucket.removePreference('cert');
+                    mattermostBucket.removePreference('emm');
+                    mattermostBucket.removeFile('entities');
                     setSiteUrl(null);
 
                     setTimeout(() => {

app/utils/image_cache_manager.js

@@ -11,8 +11,6 @@ import {Client4} from 'mattermost-redux/client';
 import {DeviceTypes} from 'app/constants';
 import mattermostBucket from 'app/mattermost_bucket';
 
-import LocalConfig from 'assets/config';
-
 const {IMAGES_PATH} = DeviceTypes;
 let siteUrl;
 
@@ -34,7 +32,7 @@ export default class ImageCacheManager {
             addListener(uri, listener);
             if (uri.startsWith('http')) {
                 try {
-                    const certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+                    const certificate = await mattermostBucket.getPreference('cert');
                     const options = {
                         session: uri,
                         timeout: 10000,

app/utils/network.js

@@ -8,7 +8,6 @@ import RNFetchBlob from 'rn-fetch-blob';
 import {Client4} from 'mattermost-redux/client';
 
 import mattermostBucket from 'app/mattermost_bucket';
-import LocalConfig from 'assets/config';
 
 let certificate = '';
 let previousState;
@@ -27,7 +26,7 @@ export async function checkConnection(isConnected) {
     };
 
     if (Platform.OS === 'ios' && certificate === '') {
-        certificate = await mattermostBucket.getPreference('cert', LocalConfig.AppGroupId);
+        certificate = await mattermostBucket.getPreference('cert');
         config.certificate = certificate;
     }
 

assets/base/config.json

@@ -39,8 +39,6 @@
     "MobileClientUpgradeAndroidApkLink": "https://about.mattermost.com/mattermost-android-app/",
     "MobileClientUpgradeIosIpaLink": "https://about.mattermost.com/mattermost-ios-app/",
 
-    "AppGroupId": "group.com.mattermost.rnbeta",
-
     "ShowSentryDebugOptions": false,
 
     "CustomRequestHeaders": {}

fastlane/Fastfile

@@ -283,6 +283,13 @@ platform :ios do
         app_group_identifiers: [app_group_id]
     )
 
+    find_replace_string(
+        path_to_file: './ios/UploadAttachments/UploadAttachments/Constants.m',
+        old_string: 'group.com.mattermost.rnbeta',
+        new_string: app_group_id
+    )
+
+
     update_app_group_identifiers(
         entitlements_file: './ios/MattermostShare/MattermostShare.entitlements',
         app_group_identifiers: [app_group_id]
@@ -290,7 +297,6 @@ platform :ios do
 
     # Save changes to the config.json file
     config_json = load_config_json
-    config_json['AppGroupId'] = app_group_id
     save_config_json(config_json)
 
     # Sync the provisioning profiles using match

ios/Mattermost.xcodeproj/xcshareddata/xcschemes/Mattermost.xcscheme

@@ -6,6 +6,20 @@
       parallelizeBuildables = "NO"
       buildImplicitDependencies = "YES">
       <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7FABE03522137F2900D0F595"
+               BuildableName = "libUploadAttachments.a"
+               BlueprintName = "UploadAttachments"
+               ReferencedContainer = "container:UploadAttachments/UploadAttachments.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
          <BuildActionEntry
             buildForTesting = "YES"
             buildForRunning = "YES"

ios/Mattermost.xcodeproj/xcshareddata/xcschemes/MattermostShare.xcscheme

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1010"
+   wasCreatedForAppExtension = "YES"
+   version = "2.0">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7FABE03522137F2900D0F595"
+               BuildableName = "libUploadAttachments.a"
+               BlueprintName = "UploadAttachments"
+               ReferencedContainer = "container:UploadAttachments/UploadAttachments.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7F240A18220D3A2300637665"
+               BuildableName = "MattermostShare.appex"
+               BlueprintName = "MattermostShare"
+               ReferencedContainer = "container:Mattermost.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7F240A18220D3A2300637665"
+            BuildableName = "MattermostShare.appex"
+            BlueprintName = "MattermostShare"
+            ReferencedContainer = "container:Mattermost.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = ""
+      selectedLauncherIdentifier = "Xcode.IDEFoundation.Launcher.PosixSpawn"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES"
+      launchAutomaticallySubstyle = "2">
+      <RemoteRunnable
+         runnableDebuggingMode = "1"
+         BundleIdentifier = "com.apple.mobileslideshow"
+         RemotePath = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/Applications/MobileSlideShow.app">
+      </RemoteRunnable>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7F240A18220D3A2300637665"
+            BuildableName = "MattermostShare.appex"
+            BlueprintName = "MattermostShare"
+            ReferencedContainer = "container:Mattermost.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES"
+      launchAutomaticallySubstyle = "2">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7F240A18220D3A2300637665"
+            BuildableName = "MattermostShare.appex"
+            BlueprintName = "MattermostShare"
+            ReferencedContainer = "container:Mattermost.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

ios/Mattermost.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ios/Mattermost.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict/>
+</plist>

ios/Mattermost/AppDelegate.m

@@ -19,13 +19,17 @@
 #endif
 #import "RCCManager.h"
 #import "RNNotifications.h"
-#import "SessionManager.h"
+#import <UploadAttachments/UploadAttachments-Swift.h>
 #import <UserNotifications/UserNotifications.h>
 
 @implementation AppDelegate
 
 NSString* const NotificationClearAction = @"clear";
 
+-(void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(NSString *)identifier completionHandler:(void (^)(void))completionHandler {
+  [[UploadSession shared] attachSessionWithIdentifier:identifier completionHandler:completionHandler];
+}
+
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
   // Clear keychain on first run in case of reinstallation
@@ -139,11 +143,6 @@ NSString* const NotificationClearAction = @"clear";
   [RNNotifications handleActionWithIdentifier:identifier forRemoteNotification:userInfo withResponseInfo:responseInfo completionHandler:completionHandler];
 }
 
--(void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(nonnull NSString *)identifier completionHandler:(nonnull void (^)(void))completionHandler {
-  [SessionManager sharedSession].savedCompletionHandler = completionHandler;
-  [[SessionManager sharedSession] createSessionForRequestRequest:identifier];
-}
-
 // Required for deeplinking
 
 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url

ios/Mattermost/Dummy.swift

@@ -0,0 +1,6 @@
+//
+//  Dummy.swift
+//  Mattermost
+//
+//  DO NOT delete this file as is needed by the project to add support for swift compilation
+//

ios/Mattermost/Mattermost-Bridging-Header.h

@@ -0,0 +1,4 @@
+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+

ios/Mattermost/MattermostBucketModule.h

@@ -0,0 +1,7 @@
+#import <Foundation/Foundation.h>
+#import "React/RCTBridgeModule.h"
+#import "MattermostBucket.h"
+
+@interface MattermostBucketModule : NSObject<RCTBridgeModule>
+@property MattermostBucket *bucket;
+@end

ios/Mattermost/MattermostBucketModule.m

@@ -0,0 +1,67 @@
+#import "MattermostBucketModule.h"
+#import "MattermostBucket.h"
+
+@implementation MattermostBucketModule
+
+RCT_EXPORT_MODULE();
+
++(BOOL)requiresMainQueueSetup
+{
+  return YES;
+}
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    self.bucket = [[MattermostBucket alloc] init];
+  }
+  return self;
+}
+
+RCT_EXPORT_METHOD(writeToFile:(NSString *)fileName
+                  content:(NSString *)content) {
+  [self.bucket writeToFile:fileName content:content];
+}
+
+RCT_EXPORT_METHOD(readFromFile:(NSString *)fileName
+                  getWithResolver:(RCTPromiseResolveBlock)resolve
+                  rejecter:(RCTPromiseRejectBlock)reject)
+{
+  id value = [self.bucket readFromFile:fileName];
+  
+  if (value == nil) {
+    value = [NSNull null];
+  }
+  
+  resolve(value);
+}
+
+RCT_EXPORT_METHOD(removeFile:(NSString *)fileName)
+{
+  [self.bucket removeFile:fileName];
+}
+
+RCT_EXPORT_METHOD(setPreference:(NSString *) key
+                  value:(NSString *) value)
+{
+  [self.bucket setPreference:key value:value];
+}
+
+RCT_EXPORT_METHOD(getPreference:(NSString *) key
+                  getWithResolver:(RCTPromiseResolveBlock)resolve
+                  rejecter:(RCTPromiseRejectBlock)reject)
+{
+  id value = [self.bucket getPreference:key];
+  
+  if (value == nil) {
+    value = [NSNull null];
+  }
+  
+  resolve(value);
+}
+
+RCT_EXPORT_METHOD(removePreference:(NSString *) key)
+{
+  [self.bucket removePreference:key];
+}
+@end

ios/MattermostBucket.h

@@ -1,7 +0,0 @@
-#import <Foundation/Foundation.h>
-#import "React/RCTBridgeModule.h"
-
-@interface MattermostBucket :  NSObject <RCTBridgeModule>
-- (NSUserDefaults *)bucketByName:(NSString*)name;
--(NSString *)readFromFile:(NSString *)fileName appGroupId:(NSString *)appGroupId;
-@end

ios/MattermostBucket.m

@@ -1,126 +0,0 @@
-//
-//  MattermostBucket.m
-//  Mattermost
-//
-//  Created by Elias Nahum on 12/11/17.
-//  Copyright © 2017 Facebook. All rights reserved.
-//
-
-#import "MattermostBucket.h"
-
-@implementation MattermostBucket
-
-+(BOOL)requiresMainQueueSetup
-{
-  return YES;
-}
-
-RCT_EXPORT_MODULE();
-
-RCT_EXPORT_METHOD(writeToFile:(NSString *)fileName
-                  content:(NSString *)content
-                  bucketName:(NSString *)bucketName) {
-  [self writeToFile:fileName content:content appGroupId:bucketName];
-}
-
-RCT_EXPORT_METHOD(readFromFile:(NSString *)fileName
-                  bucketName:(NSString*)bucketName
-                  getWithResolver:(RCTPromiseResolveBlock)resolve
-                  rejecter:(RCTPromiseRejectBlock)reject)
-{
-  id value = [self readFromFile:fileName appGroupId:bucketName];
-  
-  if (value == nil) {
-    value = [NSNull null];
-  }
-  
-  resolve(value);
-}
-
-RCT_EXPORT_METHOD(removeFile:(NSString *)fileName
-                  bucketName:(NSString*)bucketName)
-{
-  [self removeFile:fileName appGroupId:bucketName];
-}
-
-RCT_EXPORT_METHOD(setPreference:(NSString *) key
-                  value:(NSString *) value
-                  bucketName:(NSString*) bucketName)
-{
-  [self setPreference:key value:value appGroupId:bucketName];
-}
-
-RCT_EXPORT_METHOD(getPreference:(NSString *) key
-                  bucketName:(NSString*) bucketName
-                  getWithResolver:(RCTPromiseResolveBlock)resolve
-                  rejecter:(RCTPromiseRejectBlock)reject)
-{
-  id value = [self getPreference:key appGroupId:bucketName];
-  
-  if (value == nil) {
-    value = [NSNull null];
-  }
-  
-  resolve(value);
-}
-
-RCT_EXPORT_METHOD(removePreference:(NSString *) key
-                  bucketName:(NSString*) bucketName)
-{
-  [self removePreference:key appGroupId:bucketName];
-}
-
--(NSString *)fileUrl:(NSString *)fileName appGroupdId:(NSString *)appGroupId {
-  NSURL *fileManagerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:appGroupId];
-  return [NSString stringWithFormat:@"%@/%@", fileManagerURL.path, fileName];
-}
-
--(void)writeToFile:(NSString *)fileName content:(NSString *)content appGroupId:(NSString *)appGroupId {
-  NSString *filePath = [self fileUrl:fileName appGroupdId:appGroupId];
-  NSFileManager *fileManager= [NSFileManager defaultManager];
-  if(![fileManager fileExistsAtPath:filePath]) {
-    [fileManager createFileAtPath:filePath contents:nil attributes:nil];
-  }
-  if ([content length] > 0) {
-    [content writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
-  }
-}
-
--(NSString *)readFromFile:(NSString *)fileName appGroupId:(NSString *)appGroupId {
-  NSString *filePath = [self fileUrl:fileName appGroupdId:appGroupId];
-  NSFileManager *fileManager= [NSFileManager defaultManager];
-  if(![fileManager fileExistsAtPath:filePath]) {
-    return nil;
-  }
-  return [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
-}
-
--(void)removeFile:(NSString *)fileName appGroupId:(NSString *)appGroupId {
-  NSString *filePath = [self fileUrl:fileName appGroupdId:appGroupId];
-  NSFileManager *fileManager= [NSFileManager defaultManager];
-  if([fileManager isDeletableFileAtPath:filePath]) {
-    [fileManager removeItemAtPath:filePath error:nil];
-  }
-}
-
--(NSUserDefaults *)bucketByName:(NSString*)name {
-  return [[NSUserDefaults alloc] initWithSuiteName: name];
-}
-
--(void) setPreference:(NSString *)key value:(NSString *) value appGroupId:(NSString*)appGroupId {
-  NSUserDefaults* bucket = [self bucketByName: appGroupId];
-  if (bucket && [key length] > 0 && [value length] > 0) {
-    [bucket setObject:value forKey:key];
-  }
-}
-
--(id) getPreference:(NSString *)key appGroupId:(NSString*)appGroupId {
-  NSUserDefaults* bucket = [self bucketByName: appGroupId];
-  return [bucket objectForKey:key];
-}
-
--(void) removePreference:(NSString *)key appGroupId:(NSString*)appGroupId {
-  NSUserDefaults* bucket = [self bucketByName: appGroupId];
-  [bucket removeObjectForKey: key];
-}
-@end

ios/MattermostShare/Base.lproj/MainInterface.storyboard

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" systemVersion="17A278a" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="j1y-V4-xli">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="j1y-V4-xli">
     <dependencies>
         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
@@ -9,7 +9,7 @@
         <!--Share View Controller-->
         <scene sceneID="ceB-am-kn3">
             <objects>
-                <viewController id="j1y-V4-xli" customClass="ShareViewController" customModuleProvider="" sceneMemberID="viewController">
+                <viewController id="j1y-V4-xli" customClass="ShareViewController" customModuleProvider="target" sceneMemberID="viewController">
                     <view key="view" opaque="NO" contentMode="scaleToFill" id="wbc-yd-nQP">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

ios/MattermostShare/ChannelsViewController.swift

@@ -0,0 +1,134 @@
+import UIKit
+
+class ChannelsViewController: UIViewController {
+
+  let searchController = UISearchController(searchResultsController: nil)
+  
+  lazy var tableView: UITableView = {
+    let tableView = UITableView(frame: self.view.frame)
+    tableView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+    tableView.dataSource = self
+    tableView.delegate = self
+    tableView.backgroundColor = .clear
+    tableView.register(UITableViewCell.self, forCellReuseIdentifier: Identifiers.ChannelCell)
+    
+    return tableView
+  }()
+  
+  var channelDecks = [Section]()
+  var filteredDecks: [Section]?
+  weak var delegate: ChannelsViewControllerDelegate?
+  
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    
+    filteredDecks = channelDecks
+    title = "Channels"
+    configureSearchBar()
+    view.addSubview(tableView)
+  }
+ 
+  func configureSearchBar() {
+    searchController.searchResultsUpdater = self
+    searchController.hidesNavigationBarDuringPresentation = false
+    searchController.dimsBackgroundDuringPresentation = false
+    searchController.searchBar.searchBarStyle = .minimal
+    searchController.searchBar.autocapitalizationType = .none
+    
+    if #available(iOS 11.0, *) {
+      // For iOS 11 and later, place the search bar in the navigation bar.
+      self.definesPresentationContext = true
+      
+      // Make the search bar always visible.
+      navigationItem.hidesSearchBarWhenScrolling = true
+      
+      navigationItem.searchController = searchController
+    } else {
+      // For iOS 10 and earlier, place the search controller's search bar in the table view's header.
+      tableView.tableHeaderView = searchController.searchBar
+    }
+  }
+  
+}
+
+private extension ChannelsViewController {
+  struct Identifiers {
+    static let ChannelCell = "channelCell"
+  }
+}
+
+extension ChannelsViewController: UITableViewDataSource {
+  func numberOfSections(in tableView: UITableView) -> Int {
+    return filteredDecks?.count ?? 0
+  }
+
+  func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+    let sec = filteredDecks?[section]
+    if (sec?.items.count)! > 0 {
+      return sec?.title
+    }
+    
+    return nil
+  }
+  
+  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+    return filteredDecks?[section].items.count ?? 0
+  }
+  
+  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+    let section = filteredDecks?[indexPath.section]
+    let cell = tableView.dequeueReusableCell(withIdentifier: Identifiers.ChannelCell, for: indexPath)
+    let item = section?.items[indexPath.row]
+    cell.textLabel?.text = item?.title
+    if item?.selected ?? false {
+      cell.accessoryType = .checkmark
+    } else {
+      cell.accessoryType = .none
+    }
+    cell.backgroundColor = .clear
+    return cell
+  }
+}
+
+protocol ChannelsViewControllerDelegate: class {
+  func selectedChannel(deck: Item)
+}
+
+extension ChannelsViewController: UITableViewDelegate {
+  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+    let section = filteredDecks?[indexPath.section]
+    if (section?.items != nil) {
+      delegate?.selectedChannel(deck: (section?.items[indexPath.row])!)
+    }
+  }
+}
+
+extension ChannelsViewController: UISearchResultsUpdating {
+  func updateSearchResults(for searchController: UISearchController) {
+    if let searchText = searchController.searchBar.text, !searchText.isEmpty {
+      filteredDecks = channelDecks.map {section in
+        let s = section.copy() as! Section
+        let items = section.items.filter{($0.title?.lowercased().contains(searchText.lowercased()))!}
+        s.items = items
+        return s
+      }
+    } else {
+      filteredDecks = channelDecks
+    }
+    
+    tableView.reloadData()
+  }
+}
+
+extension ChannelsViewController: UISearchBarDelegate {
+  func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
+    searchBar.showsCancelButton = false
+    searchBar.text = ""
+    searchBar.resignFirstResponder()
+    tableView.reloadData()
+  }
+  
+  func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
+    searchBar.showsCancelButton = true
+  }
+}

ios/MattermostShare/GenericPreview.swift

@@ -0,0 +1,25 @@
+import UIKit
+
+class GenericPreview: UIView {
+    
+    @IBOutlet var contentView: UIView!
+    @IBOutlet weak var mainLabel: UILabel!
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        commonInit()
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        commonInit()
+    }
+    
+    
+    private func commonInit() {
+        Bundle.main.loadNibNamed("GenericPreview", owner: self, options: nil)
+        addSubview(contentView)
+        contentView.frame = self.bounds
+        contentView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
+    }
+}

ios/MattermostShare/GenericPreview.xib

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
+    <dependencies>
+        <deployment version="4144" identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="GenericPreview" customModule="MattermostShare">
+            <connections>
+                <outlet property="contentView" destination="iN0-l3-epB" id="zsU-gT-pKk"/>
+                <outlet property="mainLabel" destination="VCO-Fr-5i7" id="kIN-uo-sj1"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view userInteractionEnabled="NO" contentMode="scaleAspectFit" id="iN0-l3-epB">
+            <rect key="frame" x="0.0" y="0.0" width="70" height="80"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <imageView userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="generic.png" translatesAutoresizingMaskIntoConstraints="NO" id="TSh-2S-BCu">
+                    <rect key="frame" x="0.0" y="0.0" width="70" height="60"/>
+                    <accessibility key="accessibilityConfiguration">
+                        <accessibilityTraits key="traits" image="YES" notEnabled="YES"/>
+                    </accessibility>
+                </imageView>
+                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="VCO-Fr-5i7">
+                    <rect key="frame" x="0.0" y="80" width="70" height="0.0"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="11"/>
+                    <color key="textColor" white="0.33333333333333331" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                    <nil key="highlightedColor"/>
+                </label>
+            </subviews>
+            <accessibility key="accessibilityConfiguration">
+                <accessibilityTraits key="traits" notEnabled="YES"/>
+            </accessibility>
+            <constraints>
+                <constraint firstItem="TSh-2S-BCu" firstAttribute="top" secondItem="iN0-l3-epB" secondAttribute="top" id="5B6-O1-NR2"/>
+                <constraint firstItem="VCO-Fr-5i7" firstAttribute="centerX" secondItem="iN0-l3-epB" secondAttribute="centerX" id="aFc-0b-hsh"/>
+                <constraint firstItem="TSh-2S-BCu" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" id="cce-KU-XTm"/>
+                <constraint firstAttribute="bottom" secondItem="TSh-2S-BCu" secondAttribute="bottom" constant="20" id="lHP-mg-Ogd"/>
+                <constraint firstAttribute="trailing" secondItem="TSh-2S-BCu" secondAttribute="trailing" id="q2A-Bm-uko"/>
+                <constraint firstAttribute="bottom" secondItem="VCO-Fr-5i7" secondAttribute="bottom" id="rpf-k7-OZN"/>
+                <constraint firstItem="VCO-Fr-5i7" firstAttribute="trailing" secondItem="iN0-l3-epB" secondAttribute="trailingMargin" constant="16" id="thO-W2-G2h"/>
+            </constraints>
+            <nil key="simulatedTopBarMetrics"/>
+            <nil key="simulatedBottomBarMetrics"/>
+            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+            <point key="canvasLocation" x="-387.19999999999999" y="-305.84707646176912"/>
+        </view>
+    </objects>
+    <resources>
+        <image name="generic.png" width="512" height="512"/>
+    </resources>
+</document>

ios/MattermostShare/Info.plist

@@ -2,10 +2,6 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>BundleEntryFilename</key>
-	<string>share.ios.js</string>
-	<key>BundleForced</key>
-	<true/>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
@@ -54,12 +50,5 @@
 		<key>NSExtensionPointIdentifier</key>
 		<string>com.apple.share-services</string>
 	</dict>
-	<key>UIAppFonts</key>
-	<array>
-		<string>Ionicons.ttf</string>
-		<string>FontAwesome.ttf</string>
-		<string>EvilIcons.ttf</string>
-		<string>OpenSans-Bold.ttf</string>
-	</array>
 </dict>
 </plist>

ios/MattermostShare/Item.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+final class Item {
+  var id: String?
+  var title: String?
+  var selected: Bool = false
+}

ios/MattermostShare/MattermostShare-Bridging-Header.h

@@ -0,0 +1,6 @@
+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+
+#import "StoreManager.h"
+#import "Constants.h"

ios/MattermostShare/MattermostShare.entitlements

@@ -2,27 +2,9 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>com.apple.developer.icloud-container-identifiers</key>
-	<array>
-		<string>iCloud.$(CFBundleIdentifier)</string>
-	</array>
-	<key>com.apple.developer.icloud-services</key>
-	<array>
-		<string>CloudDocuments</string>
-	</array>
-	<key>com.apple.developer.ubiquity-container-identifiers</key>
-	<array>
-		<string>iCloud.$(CFBundleIdentifier)</string>
-	</array>
-	<key>com.apple.developer.ubiquity-kvstore-identifier</key>
-	<string>$(TeamIdentifierPrefix)$(CFBundleIdentifier)</string>
 	<key>com.apple.security.application-groups</key>
 	<array>
 		<string>group.com.mattermost.rnbeta</string>
 	</array>
-	<key>keychain-access-groups</key>
-	<array>
-		<string>$(AppIdentifierPrefix)com.mattermost.rnbeta</string>
-	</array>
 </dict>
 </plist>

ios/MattermostShare/PerformRequests.h

@@ -1,23 +0,0 @@
-#import <Foundation/Foundation.h>
-#import "MattermostBucket.h"
-
-@interface PerformRequests : NSObject<NSURLSessionDelegate, NSURLSessionTaskDelegate>
-@property (nonatomic, strong) NSString *appGroupId;
-@property (nonatomic, strong) NSString *requestId;
-@property (nonatomic, strong) NSMutableArray *fileIds;
-@property (nonatomic, strong) NSArray *files;
-@property (nonatomic, strong) NSDictionary *post;
-
-@property (nonatomic, strong) NSString *serverUrl;
-@property (nonatomic, strong) NSString *token;
-@property (nonatomic, strong) NSExtensionContext *extensionContext;
-@property MattermostBucket *bucket;
-
-- (id) initWithPost:(NSDictionary *) post
-          withFiles:(NSArray *) files
-       forRequestId:(NSString *)requestId
-       inAppGroupId:(NSString *) appGroupId
-       inContext:(NSExtensionContext *) extensionContext;
-
--(void)createPost;
-@end

ios/MattermostShare/PerformRequests.m

@@ -1,154 +0,0 @@
-#import "PerformRequests.h"
-#import "MattermostBucket.h"
-#import "SessionManager.h"
-
-@implementation PerformRequests
-
-- (id) initWithPost:(NSDictionary *) post
-          withFiles:(NSArray *) files
-       forRequestId:(NSString *)requestId
-       inAppGroupId:(NSString *) appGroupId
-          inContext:(NSExtensionContext *) context {
-  self = [super init];
-  if (self) {
-    self.post = post;
-    self.files = files;
-    self.appGroupId = appGroupId;
-    self.requestId = requestId;
-    self.extensionContext = context;
-
-    self.bucket = [[MattermostBucket alloc] init];
-    [self setCredentials];
-  }
-  return self;
-}
-
--(void)setCredentials {
-  NSString *entitiesString = [self.bucket readFromFile:@"entities" appGroupId:self.appGroupId];
-  NSData *entitiesData = [entitiesString dataUsingEncoding:NSUTF8StringEncoding];
-  NSDictionary *entities = [NSJSONSerialization JSONObjectWithData:entitiesData options:NSJSONReadingMutableContainers error:nil];
-  NSDictionary *credentials = [[entities objectForKey:@"general"] objectForKey:@"credentials"];
-  self.serverUrl = [credentials objectForKey:@"url"];
-  self.token = [credentials objectForKey:@"token"];
-}
-
--(void)URLSession:(NSURLSession *)session task:(NSURLSessionDataTask *)task didCompleteWithError:(nullable NSError *)error {
-  if(error != nil) {
-    NSLog(@"ERROR %@", [error userInfo]);
-    [self.extensionContext completeRequestReturningItems:nil
-                                       completionHandler:nil];
-    NSLog(@"invalidating session %@", self.requestId);
-    [session finishTasksAndInvalidate];
-  }
-}
-
--(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
-  NSString *sessionRequestId = [[session configuration] identifier];
-  
-  if ([sessionRequestId containsString:@"files"]) {
-    NSLog(@"Got file response");
-    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
-    if (json != nil) {
-      NSArray *fileInfos = [json objectForKey:@"file_infos"];
-      self.fileIds = [[NSMutableArray alloc] init];
-      for (id file in fileInfos) {
-        [self.fileIds addObject:[file objectForKey:@"id"]];
-      }
-      NSLog(@"Calling sendPostRequest");
-      [self sendPostRequest];
-    }
-    
-    NSLog(@"Cleaning temp files");
-    [self cleanUpTempFiles];
-  }
-}
-
--(void)createPost {
-  NSString *channelId = [self.post objectForKey:@"channel_id"];
-  
-  NSURL *filesUrl = [NSURL URLWithString:[self.serverUrl stringByAppendingString:@"/api/v4/files"]];
-  
-  if (self.files != nil && [self.files count] > 0) {
-    NSString *POST_BODY_BOUNDARY = @"mobile.client.file.upload";
-    NSURLSessionConfiguration* config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:[self.requestId stringByAppendingString:@"-files"]];
-    config.sharedContainerIdentifier = self.appGroupId;
-    
-    NSMutableURLRequest *uploadRequest = [NSMutableURLRequest requestWithURL:filesUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120.0];
-    [uploadRequest setHTTPMethod:@"POST"];
-    [uploadRequest setValue:[@"Bearer " stringByAppendingString:self.token] forHTTPHeaderField:@"Authorization"];
-    [uploadRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"];
-    
-    NSString *contentTypeValue = [NSString stringWithFormat:@"multipart/form-data;boundary=%@", POST_BODY_BOUNDARY];
-    [uploadRequest addValue:contentTypeValue forHTTPHeaderField:@"Content-Type"];
-    
-    NSMutableData *dataForm = [NSMutableData alloc];
-    [dataForm appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", POST_BODY_BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
-    [dataForm appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"channel_id\";\r\n\r\n%@", channelId] dataUsingEncoding:NSUTF8StringEncoding]];
-    
-    for (id file in self.files) {
-      NSData *fileData = [NSData dataWithContentsOfFile:[file objectForKey:@"filePath"]];
-      NSString *mimeType = [file objectForKey:@"mimeType"];
-      NSLog(@"MimeType %@", mimeType);
-      [dataForm appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", POST_BODY_BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
-      [dataForm appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"%@\"\r\n",
-                             [file objectForKey:@"filename"]] dataUsingEncoding:NSUTF8StringEncoding]];
-      [dataForm appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimeType] dataUsingEncoding:NSUTF8StringEncoding]];
-      [dataForm appendData:[NSData dataWithData:fileData]];
-    }
-    
-    [dataForm appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", POST_BODY_BOUNDARY] dataUsingEncoding:NSUTF8StringEncoding]];
-    [uploadRequest setHTTPBody:dataForm];
-    NSURLSession *uploadSession = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
-    NSURLSessionDataTask *uploadTask = [uploadSession dataTaskWithRequest:uploadRequest];
-    NSLog(@"Executing file request");
-    [uploadTask resume];
-  } else {
-    [self sendPostRequest];
-  }
-}
-
--(void)sendPostRequest {
-  NSMutableDictionary *post = [self.post mutableCopy];
-  [post setValue:self.fileIds forKey:@"file_ids"];
-  NSData *postData = [NSJSONSerialization dataWithJSONObject:post options:NSJSONWritingPrettyPrinted error:nil];
-  NSString* postAsString = [[NSString alloc] initWithData:postData encoding:NSUTF8StringEncoding];
-  
-  NSURL *createUrl = [NSURL URLWithString:[self.serverUrl stringByAppendingString:@"/api/v4/posts"]];
-  
-  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:createUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:5.0];
-  [request setHTTPMethod:@"POST"];
-  [request setValue:[@"Bearer " stringByAppendingString:self.token] forHTTPHeaderField:@"Authorization"];
-  [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
-  [request setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
-  [request setHTTPBody:[postAsString dataUsingEncoding:NSUTF8StringEncoding]];
-  
-  NSURLSessionConfiguration* config = [NSURLSessionConfiguration ephemeralSessionConfiguration];
-  NSURLSession *createSession = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];
-  NSURLSessionDataTask *createTask = [createSession dataTaskWithRequest:request];
-  NSLog(@"Executing post request");
-  [createTask resume];
-  [self.extensionContext completeRequestReturningItems:nil
-                                     completionHandler:nil];
-  NSLog(@"Extension closed");
-}
-
-- (void) cleanUpTempFiles {
-  NSURL *tmpDirectoryURL = [[SessionManager sharedSession] tempContainerURL:self.appGroupId];
-  if (tmpDirectoryURL == nil) {
-    return;
-  }
-  
-  NSFileManager *fileManager = [NSFileManager defaultManager];
-  NSError *error;
-  NSArray *tmpFiles = [fileManager contentsOfDirectoryAtPath:[tmpDirectoryURL path] error:&error];
-  if (error) {
-    return;
-  }
-  
-  for (NSString *file in tmpFiles)
-  {
-    error = nil;
-    [fileManager removeItemAtPath:[[tmpDirectoryURL URLByAppendingPathComponent:file] path] error:&error];
-  }
-}
-@end

ios/MattermostShare/Section.swift

@@ -0,0 +1,13 @@
+import Foundation
+
+class Section: NSObject, NSCopying {
+  var title: String?
+  var items: [Item] = []
+  
+  func copy(with zone: NSZone? = nil) -> Any {
+    let copy = Section()
+    copy.title = title
+    copy.items = items
+    return copy
+  }
+}

ios/MattermostShare/SessionManager.h

@@ -1,23 +0,0 @@
-#import <Foundation/Foundation.h>
-#import "MattermostBucket.h"
-#import "KeyChainDataSource.h"
-
-@interface SessionManager : NSObject<NSURLSessionDelegate, NSURLSessionTaskDelegate>
-@property (nonatomic, copy) void (^savedCompletionHandler)(void);
-@property (nonatomic, copy) void (^sendShareEvent)(NSString *);
-@property (nonatomic, copy) void (^closeExtension)(void);
-@property MattermostBucket *bucket;
-@property (nonatomic, retain) KeyChainDataSource *keyChain;
-@property (nonatomic, strong) NSString *requestWithGroup;
-@property (nonatomic, strong) NSString *certificateName;
-@property (nonatomic) BOOL isBackground;
-
-
-+(instancetype)sharedSession;
--(NSString *)getAppGroupIdFromRequestIdentifier:(NSString *) requestWithGroup;
--(NSURLSession *)createSessionForRequestRequest:(NSString *)requestId;
--(void)setRequestWithGroup:(NSString *)requestWithGroup certificateName:(NSString *)certificateName;
--(void)setDataForRequest:(NSDictionary *)data forRequestWithGroup:(NSString *)requestId;
--(void)createPostForRequest:(NSString *)requestId;
--(NSURL*)tempContainerURL:(NSString*)appGroupId;
-@end

ios/MattermostShare/SessionManager.m

@@ -1,300 +0,0 @@
-#import "SessionManager.h"
-#import "MattermostBucket.h"
-
-@implementation SessionManager
-
-@synthesize keyChain;
-
-+ (instancetype)sharedSession {
-  static id sharedMyManager = nil;
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^{
-    sharedMyManager = [[self alloc] init];
-  });
-  return sharedMyManager;
-}
-
-- (instancetype)init {
-  self = [super init];
-  if (self) {
-    self.bucket = [[MattermostBucket alloc] init];
-    self.keyChain = [[KeyChainDataSource alloc] initWithMode:KSM_Identities];
-  }
-  return self;
-}
-
--(void)setRequestWithGroup:(NSString *)requestWithGroup certificateName:(NSString *)certificateName {
-  self.requestWithGroup = requestWithGroup;
-  self.certificateName = certificateName;
-  self.isBackground = [certificateName length] == 0;
-}
-
--(void)setDataForRequest:(NSDictionary *)data forRequestWithGroup:(NSString *)requestWithGroup {
-  NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-  [[self.bucket bucketByName:appGroupId] setObject:data forKey:requestWithGroup];
-}
-
-
--(NSString *)getAppGroupIdFromRequestIdentifier:(NSString *) requestWithGroup {
-  return [requestWithGroup componentsSeparatedByString:@"|"][1];
-}
-
--(NSDictionary *)getCredentialsForRequest:(NSString *)requestWithGroup {
-  NSString * appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-  NSString *entitiesString = [self.bucket readFromFile:@"entities" appGroupId:appGroupId];
-  NSData *entitiesData = [entitiesString dataUsingEncoding:NSUTF8StringEncoding];
-  NSError *error;
-  NSDictionary *entities = [NSJSONSerialization JSONObjectWithData:entitiesData options:NSJSONReadingMutableContainers error:&error];
-  if (error != nil) {
-    return nil;
-  }
-  return [[entities objectForKey:@"general"] objectForKey:@"credentials"];
-}
-
--(NSDictionary *)getDataForRequest:(NSString *)requestWithGroup {
-  NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-  return [[self.bucket bucketByName:appGroupId]  objectForKey:requestWithGroup];
-}
-
--(NSURLSession *)createSessionForRequestRequest:(NSString *)requestWithGroup {
-  NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-  NSURLSessionConfiguration* config;
-  if (self.isBackground) {
-    config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:requestWithGroup];
-  } else {
-    config = [NSURLSessionConfiguration defaultSessionConfiguration];
-  }
-
-  config.sharedContainerIdentifier = appGroupId;
-  return [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];
-}
-
--(void) createPost:(NSDictionary *) post
-         withFiles:(NSArray *)files
-       credentials:(NSDictionary *) credentials
-  requestWithGroup:(NSString *)requestWithGroup {
-  NSString *serverUrl = [credentials objectForKey:@"url"];
-  NSString *token = [credentials objectForKey:@"token"];
-  NSString *channelId = [post objectForKey:@"channel_id"];
-  NSURLSession *session = [self createSessionForRequestRequest:requestWithGroup];
-  NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-
-  for (id file in files) {
-    NSURL *filePath = [NSURL fileURLWithPath:[file objectForKey:@"filePath"]];
-    NSString *fileName = [file objectForKey:@"filename"];
-
-    NSError *err;
-    NSURL *tempContainerURL = [self tempContainerURL:appGroupId];
-    NSURL *destinationURL = [tempContainerURL URLByAppendingPathComponent: fileName];
-    BOOL bVal = [[NSFileManager defaultManager] copyItemAtURL:filePath toURL:destinationURL error:&err];
-
-    NSCharacterSet *allowedCharacters = [NSCharacterSet URLQueryAllowedCharacterSet];
-    NSString *encodedFilename = [[file objectForKey:@"filename"] stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacters];
-    NSString *url = [serverUrl stringByAppendingString:@"/api/v4/files"];
-    NSString *queryString = [NSString stringWithFormat:@"?channel_id=%@&filename=%@", channelId, encodedFilename];
-    NSURL *filesUrl = [NSURL URLWithString:[url stringByAppendingString:queryString]];
-    NSMutableURLRequest *uploadRequest = [NSMutableURLRequest requestWithURL:filesUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120.0];
-    [uploadRequest setHTTPMethod:@"POST"];
-    [uploadRequest setValue:[@"Bearer " stringByAppendingString:token] forHTTPHeaderField:@"Authorization"];
-    [uploadRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"];
-
-    NSURLSessionUploadTask *task = [session uploadTaskWithRequest:uploadRequest fromFile:destinationURL];
-    NSLog(@"Executing file request %@", fileName);
-    [task resume];
-  }
-}
-
--(void) createPost:(NSMutableDictionary *)post
-       withFileIds:(NSArray *)fileIds
-       credentials:(NSDictionary *) credentials {
-  NSString *serverUrl = [credentials objectForKey:@"url"];
-  NSString *token = [credentials objectForKey:@"token"];
-
-  if (fileIds != nil && [fileIds count] > 0) {
-    [post setObject:fileIds forKey:@"file_ids"];
-  }
-
-  NSError *error;
-  NSData *postData = [NSJSONSerialization dataWithJSONObject:post options:NSJSONWritingPrettyPrinted error:&error];
-  
-  if (error == nil) {
-    NSString* postAsString = [[NSString alloc] initWithData:postData encoding:NSUTF8StringEncoding];
-    
-    NSURL *createUrl = [NSURL URLWithString:[serverUrl stringByAppendingString:@"/api/v4/posts"]];
-    
-    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:createUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:5.0];
-    [request setHTTPMethod:@"POST"];
-    [request setValue:[@"Bearer " stringByAppendingString:token] forHTTPHeaderField:@"Authorization"];
-    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
-    [request setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
-    [request setHTTPBody:[postAsString dataUsingEncoding:NSUTF8StringEncoding]];
-    
-    NSURLSessionConfiguration* config = [NSURLSessionConfiguration ephemeralSessionConfiguration];
-    NSURLSession *createSession = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];
-    NSURLSessionDataTask *createTask = [createSession dataTaskWithRequest:request];
-    NSLog(@"Executing post request");
-    [createTask resume];
-    self.closeExtension();
-  } else {
-    self.sendShareEvent(@"extensionPostFailed");
-  }
-}
-
--(void)createPostForRequest:(NSString *)requestWithGroup {
-  NSDictionary *data = [self getDataForRequest:requestWithGroup];
-  NSDictionary *post = [data objectForKey:@"post"];
-  NSArray *files = [data objectForKey:@"files"];
-  NSDictionary *credentials = [self getCredentialsForRequest:requestWithGroup];
-
-  if (credentials == nil) {
-    self.sendShareEvent(@"extensionPostFailed");
-    return;
-  }
-
-  if (files != nil && [files count] > 0) {
-    [self createPost:post withFiles:files credentials:credentials requestWithGroup:requestWithGroup];
-  }
-  else {
-    [self createPost:[post mutableCopy] withFileIds:nil credentials:credentials];
-  }
-}
-
--(void)sendPostRequestForId:(NSString *)requestWithGroup {
-  NSDictionary *data = [self getDataForRequest:requestWithGroup];
-  NSDictionary *credentials = [self getCredentialsForRequest:requestWithGroup];
-
-  NSMutableDictionary *post = [[data objectForKey:@"post"] mutableCopy];
-  NSArray *fileIds = [data objectForKey:@"file_ids"];
-
-  [self createPost:post withFileIds:fileIds credentials:credentials];
-}
-
--(NSURL*)tempContainerURL:(NSString*)appGroupId {
-  NSFileManager *manager = [NSFileManager defaultManager];
-  NSURL *containerURL = [manager containerURLForSecurityApplicationGroupIdentifier:appGroupId];
-  NSURL *tempDirectoryURL = [containerURL URLByAppendingPathComponent:@"shareTempItems"];
-  if (![manager fileExistsAtPath:[tempDirectoryURL path]]) {
-    NSError *err;
-    [manager createDirectoryAtURL:tempDirectoryURL withIntermediateDirectories:YES attributes:nil error:&err];
-    if (err) {
-      return nil;
-    }
-  }
-  
-  return tempDirectoryURL;
-}
-
-
--(void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential * _Nullable))completionHandler {
-  NSLog(@"completition handler from normal challenge");
-  if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodClientCertificate]) {
-    if (self.certificateName) {
-      SecIdentityRef identity = [keyChain GetIdentityByName:self.certificateName];
-      if (identity != nil) {
-        SecCertificateRef certificate = NULL;
-        OSStatus status = SecIdentityCopyCertificate(identity, &certificate);
-        if (!status) {
-          CFArrayRef emailAddresses = NULL;
-          SecCertificateCopyEmailAddresses(certificate, &emailAddresses);
-          NSArray *emails = (NSArray *)CFBridgingRelease(emailAddresses);
-          CFStringRef summaryRef = SecCertificateCopySubjectSummary(certificate);
-          NSString *tagstr = (NSString*)CFBridgingRelease(summaryRef);
-          NSString *email = @"";
-          if ([emails count] > 0){
-            email = [emails objectAtIndex:0];
-          }
-          NSLog(@"completion %@ %@", tagstr, email);
-          const void *certs[] = {certificate};
-          CFArrayRef certArray = CFArrayCreate(kCFAllocatorDefault, certs, 1, NULL);
-          NSURLCredential *credential = [NSURLCredential credentialWithIdentity:identity certificates:(__bridge NSArray*)certArray persistence:NSURLCredentialPersistencePermanent];
-          [challenge.sender useCredential:credential forAuthenticationChallenge:challenge];
-          completionHandler(NSURLSessionAuthChallengeUseCredential,credential);
-          NSLog(@"completion handler for certificate");
-          return;
-        }
-      }
-    }
-    completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
-  } else {
-    NSLog(@"completion handler regular stuff");
-    completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
-  }
-}
-
--(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
-  NSString *requestWithGroup;
-  if (self.isBackground) {
-    requestWithGroup = [[session configuration] identifier];
-  } else {
-    requestWithGroup = self.requestWithGroup;
-  }
-  NSURL *requestUrl = [[dataTask originalRequest] URL];
-
-  if ([[requestUrl absoluteString] containsString:@"files"]) {
-    NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-    NSError *error;
-    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
-    if (error == nil && json != nil) {
-      NSArray *fileInfos = [json objectForKey:@"file_infos"];
-      NSDictionary *dataFromBucket = [self getDataForRequest:requestWithGroup];
-      NSMutableDictionary *data = [dataFromBucket mutableCopy];
-      NSMutableArray *fileIds = [[data objectForKey:@"file_ids"] mutableCopy];
-      if (fileIds == nil && data != nil) {
-        fileIds = [[NSMutableArray alloc] init];
-      }
-
-      for (id file in fileInfos) {
-        [fileIds addObject:[file objectForKey:@"id"]];
-        NSString * filename = [file objectForKey:@"name"];
-        NSLog(@"got file id %@ %@", [file objectForKey:@"id"], filename);
-        NSURL *tempContainerURL = [self tempContainerURL:appGroupId];
-        NSURL *destinationURL = [tempContainerURL URLByAppendingPathComponent: filename];
-        [[NSFileManager defaultManager] removeItemAtURL:destinationURL error:nil];
-      }
-      [data setObject:fileIds forKey:@"file_ids"];
-      [self setDataForRequest:data forRequestWithGroup:requestWithGroup];
-    } else {
-      self.sendShareEvent(@"extensionPostFailed");
-    }
-  }
-}
-
--(void)URLSession:(NSURLSession *)session task:(NSURLSessionDataTask *)task didCompleteWithError:(nullable NSError *)error {
-  NSString *requestWithGroup;
-  if (self.isBackground) {
-    requestWithGroup = [[session configuration] identifier];
-  } else {
-    requestWithGroup = self.requestWithGroup;
-  }
-
-  if(error != nil) {
-    NSLog(@"completition ERROR %@", [error userInfo]);
-    NSLog(@"invalidating session %@", requestWithGroup);
-    [session invalidateAndCancel];
-    self.sendShareEvent(@"extensionPostFailed");
-  } else if (requestWithGroup != nil) {
-    NSString *appGroupId = [self getAppGroupIdFromRequestIdentifier:requestWithGroup];
-    NSURL *requestUrl = [[task originalRequest] URL];
-
-    NSDictionary *data = [self getDataForRequest:requestWithGroup];
-    NSArray *files = [data objectForKey:@"files"];
-    NSMutableArray *fileIds = [data objectForKey:@"file_ids"];
-
-    if ([[requestUrl absoluteString] containsString:@"files"] &&
-        [files count] == [fileIds count]) {
-      [self sendPostRequestForId:requestWithGroup];
-      [[self.bucket bucketByName:appGroupId] removeObjectForKey:requestWithGroup];
-    }
-  } else {
-    NSLog(@"SOMETHING ELSE");
-  }
-}
-
--(void)URLSessionDidFinishEventsForBackgroundURLSession:(NSURLSession *)session {
-  if (self.savedCompletionHandler) {
-    self.savedCompletionHandler();
-    self.savedCompletionHandler = nil;
-  }
-}
-
-@end

ios/MattermostShare/ShareViewController.h

@@ -1,5 +0,0 @@
-#import <UIKit/UIKit.h>
-#import "React/RCTBridgeModule.h"
-
-@interface ShareViewController : UIViewController<RCTBridgeModule>
-@end

ios/MattermostShare/ShareViewController.m

@@ -1,285 +0,0 @@
-#import "ShareViewController.h"
-#import <React/RCTBundleURLProvider.h>
-#import <React/RCTRootView.h>
-#import "PerformRequests.h"
-#import "SessionManager.h"
-
-NSExtensionContext* extensionContext;
-
-@implementation ShareViewController
-+ (BOOL)requiresMainQueueSetup
-{
-  return YES;
-}
-
-@synthesize bridge = _bridge;
-
-- (UIView*) shareView {
-  NSURL *jsCodeLocation;
-  
-  jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"share.ios" fallbackResource:nil];
-  
-  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
-                                                      moduleName:@"MattermostShare"
-                                               initialProperties:nil
-                                                   launchOptions:nil];
-  rootView.backgroundColor = nil;
-  return rootView;
-}
-
-RCT_EXPORT_MODULE(MattermostShare);
-
-- (void)viewDidLoad {
-  [super viewDidLoad];
-  extensionContext = self.extensionContext;
-  UIView *rootView = [self shareView];
-  if (rootView.backgroundColor == nil) {
-    rootView.backgroundColor = [[UIColor alloc] initWithRed:1 green:1 blue:1 alpha:0.1];
-  }
-  
-  self.view = rootView;
-}
-
-RCT_REMAP_METHOD(getOrientation,
-                  resolver:(RCTPromiseResolveBlock)resolve
-                  rejecter:(RCTPromiseRejectBlock)reject) {
-  if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height) {
-    resolve(@"PORTRAIT");
-  } else {
-    resolve(@"LANDSCAPE");
-  }
-}
-
-RCT_EXPORT_METHOD(close:(NSDictionary *)data appGroupId:(NSString *)appGroupId) {
-  if (data != nil) {
-    NSString *requestId = [data objectForKey:@"requestId"];
-    NSString *useBackgroundUpload = [data objectForKey:@"useBackgroundUpload"];
-    NSString *certificateName = [data objectForKey:@"certificate"];
-    BOOL tryToUploadInTheBackgound = useBackgroundUpload ? [useBackgroundUpload boolValue] : NO;
-
-    if (tryToUploadInTheBackgound) {
-      NSString *requestWithGroup = [NSString stringWithFormat:@"%@|%@", requestId, appGroupId];
-      [SessionManager sharedSession].closeExtension = ^{
-         [extensionContext completeRequestReturningItems:nil
-                                        completionHandler:nil];
-         NSLog(@"Extension closed");
-      };
-
-      [SessionManager sharedSession].sendShareEvent = ^(NSString* eventName) {
-        NSLog(@"Send Share Extension Event to JS");
-        [_bridge enqueueJSCall:@"RCTDeviceEventEmitter"
-                        method:@"emit"
-                          args:@[eventName]
-                    completion:nil];
-      };
-
-      [[SessionManager sharedSession] setRequestWithGroup:requestWithGroup certificateName:certificateName];
-      [[SessionManager sharedSession] setDataForRequest:data forRequestWithGroup:requestWithGroup];
-      [[SessionManager sharedSession] createPostForRequest:requestWithGroup];
-    } else {
-      NSDictionary *post = [data objectForKey:@"post"];
-      NSArray *files = [data objectForKey:@"files"];
-      PerformRequests *request = [[PerformRequests alloc] initWithPost:post withFiles:files forRequestId:requestId inAppGroupId:appGroupId inContext:extensionContext];
-      [request createPost];
-    }
-  } else {
-    [extensionContext completeRequestReturningItems:nil
-                                completionHandler:nil];
-    NSLog(@"Extension closed");
-  }
-}
-
-RCT_REMAP_METHOD(data,
-                 appGroupId: (NSString *)appGroupId
-                 resolver:(RCTPromiseResolveBlock)resolve
-                 rejecter:(RCTPromiseRejectBlock)reject)
-{
-  [self extractDataFromContext: extensionContext withAppGroup: appGroupId andCallback:^(NSArray* items ,NSError* err) {
-    if (err) {
-      reject(@"data", @"Failed to extract attachment content", err);
-      return;
-    }
-    resolve(items);
-  }];
-}
-
-typedef void (^ProviderCallback)(NSString *content, NSString *contentType, BOOL owner, NSError *err);
-
-- (void)extractDataFromContext:(NSExtensionContext *)context withAppGroup:(NSString *) appGroupId andCallback:(void(^)(NSArray *items ,NSError *err))callback {
-  @try {
-    NSExtensionItem *item = [context.inputItems firstObject];
-    NSArray *attachments = item.attachments;
-    NSMutableArray *items = [[NSMutableArray alloc] init];
-    
-    __block int attachmentIdx = 0;
-    __block ProviderCallback providerCb = nil;
-    __block __weak ProviderCallback weakProviderCb = nil;
-    providerCb = ^ void (NSString *content, NSString *contentType, BOOL owner, NSError *err) {
-      if (err) {
-        callback(nil, err);
-        return;
-      }
-      
-      if (content != nil) {
-        [items addObject:@{
-                           @"type": contentType,
-                           @"value": content,
-                           @"owner": [NSNumber numberWithBool:owner],
-                           }];
-      }
-      
-      ++attachmentIdx;
-      if (attachmentIdx == [attachments count]) {
-        callback(items, nil);
-      } else {
-        [self extractDataFromProvider:attachments[attachmentIdx] withAppGroup:appGroupId andCallback: weakProviderCb];
-      }
-    };
-    weakProviderCb = providerCb;
-    [self extractDataFromProvider:attachments[0] withAppGroup:appGroupId andCallback: providerCb];
-  }
-  @catch (NSException *exc) {
-    NSError *error = [NSError errorWithDomain:@"fiftythree.paste" code:1 userInfo:@{
-                                                                                    @"reason": [exc description]
-                                                                                    }];
-    callback(nil, error);
-  }
-}
-
-- (void)extractDataFromProvider:(NSItemProvider *)provider withAppGroup:(NSString *) appGroupId andCallback:(void(^)(NSString* content, NSString* contentType, BOOL owner, NSError *err))callback {
-  if([provider hasItemConformingToTypeIdentifier:@"public.movie"]) {
-    [provider loadItemForTypeIdentifier:@"public.movie" options:nil completionHandler:^(id<NSSecureCoding, NSObject> item, NSError *error) {
-      @try {
-        if ([item isKindOfClass: NSURL.class]) {
-          NSURL *url = (NSURL *)item;
-          return callback([url absoluteString], @"public.movie", NO, nil);
-        }
-        return callback(nil, nil, NO, nil);
-      }
-      @catch(NSException *exc) {
-        NSError *error = [NSError errorWithDomain:@"fiftythree.paste" code:2 userInfo:@{
-                                                                                        @"reason": [exc description]
-                                                                                        }];
-        callback(nil, nil, NO, error);
-      }
-    }];
-    return;
-  }
-  if([provider hasItemConformingToTypeIdentifier:@"public.image"]) {
-    [provider loadItemForTypeIdentifier:@"public.image" options:nil completionHandler:^(id<NSSecureCoding, NSObject> item, NSError *error) {
-      if (error) {
-        callback(nil, nil, NO, error);
-        return;
-      }
-      
-      @try {
-        if ([item isKindOfClass: NSURL.class]) {
-          NSURL *url = (NSURL *)item;
-          return callback([url absoluteString], @"public.image", NO, nil);
-        } else if ([item isKindOfClass: UIImage.class]) {
-          UIImage *image = (UIImage *)item;
-          NSString *fileName = [NSString stringWithFormat:@"%@.jpg", [[NSUUID UUID] UUIDString]];
-          NSURL *tempContainerURL = [[SessionManager sharedSession] tempContainerURL:appGroupId];
-          if (tempContainerURL == nil){
-            return callback(nil, nil, NO, nil);
-          }
-          
-          NSURL *tempFileURL = [tempContainerURL URLByAppendingPathComponent: fileName];
-          BOOL created = [UIImageJPEGRepresentation(image, 0.8) writeToFile:[tempFileURL path] atomically:YES];
-          if (created) {
-            return callback([tempFileURL absoluteString], @"public.image", YES, nil);
-          } else {
-            return callback(nil, nil, NO, nil);
-          }
-        } else if ([item isKindOfClass: NSData.class]) {
-          NSString *fileName = [NSString stringWithFormat:@"%@.jpg", [[NSUUID UUID] UUIDString]];
-          NSData *data = (NSData *)item;
-          UIImage *image = [UIImage imageWithData:data];
-          NSURL *tempContainerURL = [[SessionManager sharedSession] tempContainerURL:appGroupId];
-          if (tempContainerURL == nil){
-            return callback(nil, nil, NO, nil);
-          }
-          NSURL *tempFileURL = [tempContainerURL URLByAppendingPathComponent: fileName];
-          BOOL created = [UIImageJPEGRepresentation(image, 0.8) writeToFile:[tempFileURL path] atomically:YES];
-          if (created) {
-            return callback([tempFileURL absoluteString], @"public.image", YES, nil);
-          } else {
-            return callback(nil, nil, NO, nil);
-          }
-        } else {
-          // Do nothing, some type we don't support.
-          return callback(nil, nil, NO, nil);
-        }
-      }
-      @catch(NSException *exc) {
-        NSError *error = [NSError errorWithDomain:@"fiftythree.paste" code:2 userInfo:@{
-                                                                                        @"reason": [exc description]
-                                                                                        }];
-        callback(nil, nil, NO, error);
-      }
-    }];
-    return;
-  }
-  
-  if([provider hasItemConformingToTypeIdentifier:@"public.file-url"]) {
-    [provider loadItemForTypeIdentifier:@"public.file-url" options:nil completionHandler:^(id<NSSecureCoding, NSObject> item, NSError *error) {
-      if (error) {
-        callback(nil, nil, NO, error);
-        return;
-      }
-      
-      if ([item isKindOfClass:NSURL.class]) {
-        return callback([(NSURL *)item absoluteString], @"public.file-url", NO, nil);
-      } else if ([item isKindOfClass:NSString.class]) {
-        return callback((NSString *)item, @"public.file-url", NO, nil);
-      }
-      callback(nil, nil, NO, nil);
-    }];
-    return;
-  }
-  
-  if([provider hasItemConformingToTypeIdentifier:@"public.url"]) {
-    [provider loadItemForTypeIdentifier:@"public.url" options:nil completionHandler:^(id<NSSecureCoding, NSObject> item, NSError *error) {
-      if (error) {
-        callback(nil, nil, NO, error);
-        return;
-      }
-      
-      if ([item isKindOfClass:NSURL.class]) {
-        return callback([(NSURL *)item absoluteString], @"public.url", NO, nil);
-      } else if ([item isKindOfClass:NSString.class]) {
-        return callback((NSString *)item, @"public.url", NO, nil);
-      }
-    }];
-    return;
-  }
-  
-  if([provider hasItemConformingToTypeIdentifier:@"public.plain-text"]) {
-    [provider loadItemForTypeIdentifier:@"public.plain-text" options:nil completionHandler:^(id<NSSecureCoding, NSObject> item, NSError *error) {
-      if (error) {
-        callback(nil, nil, NO, error);
-        return;
-      }
-      
-      if ([item isKindOfClass:NSString.class]) {
-        return callback((NSString *)item, @"public.plain-text", NO, nil);
-      } else if ([item isKindOfClass:NSAttributedString.class]) {
-        NSAttributedString *str = (NSAttributedString *)item;
-        return callback([str string], @"public.plain-text", NO, nil);
-      } else if ([item isKindOfClass:NSData.class]) {
-        NSString *str = [[NSString alloc] initWithData:(NSData *)item encoding:NSUTF8StringEncoding];
-        if (str) {
-          return callback(str, @"public.plain-text", NO, nil);
-        } else {
-          return callback(nil, nil, NO, nil);
-        }
-      } else {
-        return callback(nil, nil, NO, nil);
-      }
-    }];
-    return;
-  }
-  
-  callback(nil, nil, NO, nil);
-}
-@end

ios/MattermostShare/ShareViewController.swift

@@ -0,0 +1,405 @@
+import UIKit
+import Social
+import MobileCoreServices
+import UploadAttachments
+
+extension Bundle {
+  var displayName: String? {
+    return object(forInfoDictionaryKey: "CFBundleDisplayName") as? String
+  }
+}
+
+class ShareViewController: SLComposeServiceViewController {
+  
+  private var dispatchGroup = DispatchGroup()
+  private var attachments = AttachmentArray<AttachmentItem>()
+  private var store = StoreManager.shared() as StoreManager
+  private var entities: [AnyHashable:Any]? = nil
+  private var sessionToken: String?
+  private var serverURL: String?
+  private var message: String?
+  private var publicURL: String?
+  
+  fileprivate var selectedChannel: Item?
+  fileprivate var selectedTeam: Item?
+
+  // MARK: - Lifecycle methods
+  override func viewDidLoad() {
+    super.viewDidLoad()
+
+    title = Bundle.main.displayName
+    placeholder = "Write a message..."
+    entities = store.getEntities(true) as [AnyHashable:Any]?
+    sessionToken = store.getToken()
+    serverURL = store.getServerUrl()
+
+    extractDataFromContext()
+    
+    if sessionToken == nil {
+      showErrorMessage(title: "", message: "Authentication required: Please first login using the app.", VC: self)
+    }
+  }
+  
+  override func isContentValid() -> Bool {
+    // Do validation of contentText and/or NSExtensionContext attachments here
+    if (attachments.count > 0) {
+      let maxFileSize = store.getMaxFileSize()
+      if attachments.hasAttachementLargerThan(fileSize: maxFileSize) {
+        let readableMaxSize = formatFileSize(bytes: Double(maxFileSize))
+        showErrorMessage(title: "", message: "File attachments shared in Mattermost must be less than \(readableMaxSize).", VC: self)
+      }
+    }
+
+    return serverURL != nil &&
+      sessionToken != nil &&
+      attachmentsCount() == attachments.count &&
+      selectedTeam != nil &&
+      selectedChannel != nil
+  }
+  
+  override func didSelectCancel() {
+    UploadSessionManager.shared.clearTempDirectory()
+    super.didSelectCancel()
+  }
+  
+  override func didSelectPost() {
+    // This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
+    if publicURL != nil {
+      self.message = "\(contentText!)\n\n\(publicURL!)"
+    } else {
+      self.message = contentText
+    }
+
+    UploadManager.shared.uploadFiles(baseURL: serverURL!, token: sessionToken!, channelId: selectedChannel!.id!, message: message, attachments: attachments, callback: {
+      // Inform the host that we're done, so it un-blocks its UI. Note: Alternatively you could call super's -didSelectPost, which will similarly complete the extension context.
+      self.extensionContext!.completeRequest(returningItems: [], completionHandler: nil)
+    })
+  }
+  
+  override func loadPreviewView() -> UIView! {
+    if attachments.findBy(type: kUTTypeFileURL as String) {
+      let genericPreview = GenericPreview()
+      genericPreview.contentMode = .scaleAspectFit
+      genericPreview.clipsToBounds = true
+      genericPreview.isUserInteractionEnabled = false
+      genericPreview.addConstraints([
+        NSLayoutConstraint(item: genericPreview, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1.0, constant: 70),
+        NSLayoutConstraint(item: genericPreview, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1.0, constant: 70)
+        ])
+      
+      if attachments.count > 1 {
+        genericPreview.mainLabel.text = "\(attachments.count) Items"
+      }
+      
+      return genericPreview
+    }
+    return super.loadPreviewView();
+  }
+  
+  override func configurationItems() -> [Any]! {
+    var items: [SLComposeSheetConfigurationItem] = []
+  
+    // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
+    let teamDecks = getTeamItems()
+    if let teams = SLComposeSheetConfigurationItem() {
+      teams.title = "Team"
+      teams.value = selectedTeam?.title
+      teams.tapHandler = {
+        let vc = TeamsViewController()
+        vc.teamDecks = teamDecks
+        vc.delegate = self
+        self.pushConfigurationViewController(vc)
+      }
+      items.append(teams)
+    }
+
+    let channelDecks = getChannelItems(forTeamId: selectedTeam?.id)
+    if let channels = SLComposeSheetConfigurationItem() {
+      channels.title = "Channels"
+      channels.value = selectedChannel?.title
+      channels.valuePending = channelDecks == nil
+      channels.tapHandler = {
+        let vc = ChannelsViewController()
+        vc.channelDecks = channelDecks!
+        vc.delegate = self
+        self.pushConfigurationViewController(vc)
+      }
+      
+      items.append(channels)
+    }
+    
+    validateContent()
+    return items
+  }
+  
+  // MARK: - Extension Builder
+  
+  func attachmentsCount() -> Int {
+    var count = 0
+    for item in extensionContext?.inputItems as! [NSExtensionItem] {
+      guard let attachments = item.attachments else {return 0}
+      for itemProvider in attachments {
+        if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeMovie as String) ||
+          itemProvider.hasItemConformingToTypeIdentifier(kUTTypeImage as String) ||
+          itemProvider.hasItemConformingToTypeIdentifier(kUTTypeFileURL as String) {
+          count = count + 1
+        }
+      }
+    }
+    
+    return count
+  }
+  
+  func buildChannelSection(channels: NSArray, currentChannelId: String, key: String, title:String) -> Section {
+    let section = Section()
+    section.title = title
+    for channel in channels as! [NSDictionary] {
+      let item = Item()
+      let id = channel.object(forKey: "id") as? String
+      item.id = id
+      item.title = channel.object(forKey: "display_name") as? String
+      if id == currentChannelId {
+        item.selected = true
+        selectedChannel = item
+      }
+      section.items.append(item)
+    }
+    return section
+  }
+  
+  func extractDataFromContext() {
+    for item in extensionContext?.inputItems as! [NSExtensionItem] {
+      guard let attachments = item.attachments else {continue}
+      for itemProvider in attachments {
+        if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeMovie as String) {
+          dispatchGroup.enter()
+          itemProvider.loadItem(forTypeIdentifier: kUTTypeMovie as String, options: nil, completionHandler: ({item, error in
+            if error == nil {
+              let attachment = self.saveAttachment(url: item as! URL)
+              if (attachment != nil) {
+                attachment?.type = kUTTypeMovie as String
+                self.attachments.append(attachment!)
+              }
+            }
+            self.dispatchGroup.leave()
+          }))
+        } else if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeImage as String) {
+          dispatchGroup.enter()
+          itemProvider.loadItem(forTypeIdentifier: kUTTypeImage as String, options: nil, completionHandler: ({item, error in
+            if error == nil {
+              let attachment = self.saveAttachment(url: item as! URL)
+              if (attachment != nil) {
+                attachment?.type = kUTTypeImage as String
+                self.attachments.append(attachment!)
+              }
+            }
+            self.dispatchGroup.leave()
+          }))
+        } else if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeFileURL as String) {
+          dispatchGroup.enter()
+          itemProvider.loadItem(forTypeIdentifier: kUTTypeFileURL as String, options: nil, completionHandler: ({item, error in
+            if error == nil {
+              let attachment = self.saveAttachment(url: item as! URL)
+              if (attachment != nil) {
+                attachment?.type = kUTTypeFileURL as String
+                self.attachments.append(attachment!)
+              }
+            }
+            self.dispatchGroup.leave()
+          }))
+        } else if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeURL as String) {
+          itemProvider.loadItem(forTypeIdentifier: kUTTypeURL as String, options: nil, completionHandler: ({item, error in
+            if let url = item as? URL {
+              self.publicURL = url.absoluteString
+            }
+          }))
+        }
+      }
+    }
+    dispatchGroup.notify(queue: DispatchQueue.main) {
+      self.validateContent()
+    }
+  }
+  
+  func getChannelsFromServerAndReload(forTeamId: String) {
+    var currentChannel = store.getCurrentChannel() as NSDictionary?
+    if currentChannel?.object(forKey: "team_id") as! String != forTeamId {
+      currentChannel = store.getDefaultChannel(forTeamId) as NSDictionary?
+    }
+    
+    // If currentChannel is nil it means we don't have the channels for this team
+    if (currentChannel == nil) {
+      let urlString = "\(serverURL!)/api/v4/users/me/teams/\(forTeamId)/channels"
+      let url = URL(string: urlString)
+      var request = URLRequest(url: url!)
+      let auth = "Bearer \(sessionToken!)" as String
+      request.setValue(auth, forHTTPHeaderField: "Authorization")
+      
+      let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
+        guard let dataResponse = data,
+          error == nil else {
+            print(error?.localizedDescription ?? "Response Error")
+            return
+            
+        }
+        
+        do{
+          //here dataResponse received from a network request
+          let jsonArray = try JSONSerialization.jsonObject(with: dataResponse, options: []) as! NSArray
+          let channels = jsonArray.filter {element in
+            let channel = element as! NSDictionary
+            let type = channel.object(forKey: "type") as! String
+            return type == "O" || type == "P"
+          }
+          let ent = self.store.getEntities(false)! as NSDictionary
+          let mutableEntities = ent.mutableCopy() as! NSMutableDictionary
+          let entitiesChannels = NSDictionary(dictionary: mutableEntities.object(forKey: "channels") as! NSMutableDictionary)
+            .object(forKey: "channels") as! NSMutableDictionary
+          
+          for item in channels {
+            let channel = item as! NSDictionary
+            entitiesChannels.setValue(channel, forKey: channel.object(forKey: "id") as! String)
+          }
+          
+          if let entitiesData: NSData = try? JSONSerialization.data(withJSONObject: ent, options: JSONSerialization.WritingOptions.prettyPrinted) as NSData {
+            let jsonString = String(data: entitiesData as Data, encoding: String.Encoding.utf8)! as String
+            self.store.updateEntities(jsonString)
+            self.store.getEntities(true)
+            self.reloadConfigurationItems()
+            self.view.setNeedsDisplay()
+          }
+        } catch let parsingError {
+          print("Error", parsingError)
+        }
+      }
+      task.resume()
+    }
+  }
+  
+  func getChannelItems(forTeamId: String?) -> [Section]? {
+    var channelDecks = [Section]()
+    var currentChannel = store.getCurrentChannel() as NSDictionary?
+    if currentChannel?.object(forKey: "team_id") as? String != forTeamId {
+      currentChannel = store.getDefaultChannel(forTeamId) as NSDictionary?
+    }
+    
+    if currentChannel == nil {
+      return nil
+    }
+    
+    let channelsInTeamBySections = store.getChannelsBySections(forTeamId) as NSDictionary
+    channelDecks.append(buildChannelSection(
+      channels: channelsInTeamBySections.object(forKey: "public") as! NSArray,
+      currentChannelId: selectedChannel?.id ?? currentChannel?.object(forKey: "id") as! String,
+      key: "public",
+      title: "Public Channels"
+    ))
+    
+    channelDecks.append(buildChannelSection(
+      channels: channelsInTeamBySections.object(forKey: "private") as! NSArray,
+      currentChannelId: selectedChannel?.id ?? currentChannel?.object(forKey: "id") as! String,
+      key: "private",
+      title: "Private Channels"
+    ))
+    
+    channelDecks.append(buildChannelSection(
+      channels: channelsInTeamBySections.object(forKey: "direct") as! NSArray,
+      currentChannelId: selectedChannel?.id ?? currentChannel?.object(forKey: "id") as! String,
+      key: "direct",
+      title: "Direct Channels"
+    ))
+    
+    return channelDecks
+  }
+  
+  func getTeamItems() -> [Item] {
+    var teamDecks = [Item]()
+    let currentTeamId = store.getCurrentTeamId()
+    let teams = store.getMyTeams() as NSArray?
+
+    for case let team as NSDictionary in teams! {
+      let item = Item()
+      item.title = team.object(forKey: "display_name") as! String?
+      item.id = team.object(forKey: "id") as! String?
+      item.selected = false
+      if (item.id == (selectedTeam?.id ?? currentTeamId)) {
+        item.selected = true
+        selectedTeam = item
+      }
+      teamDecks.append(item)
+    }
+    
+    return teamDecks
+  }
+
+  func saveAttachment(url: URL) -> AttachmentItem? {
+    let tempURL: URL? = UploadSessionManager.shared.tempContainerURL() as URL?
+    let fileMgr = FileManager.default
+    let fileName = url.lastPathComponent
+    let tempFileURL = tempURL?.appendingPathComponent(fileName)
+
+    do {
+      try? FileManager.default.removeItem(at: tempFileURL!)
+      try fileMgr.copyItem(at: url, to: tempFileURL!)
+      let attr = try fileMgr.attributesOfItem(atPath: (tempFileURL?.path)!) as NSDictionary
+
+      let attachment = AttachmentItem()
+      attachment.fileName = fileName
+      attachment.fileURL = tempFileURL
+      attachment.fileSize = attr.fileSize()
+      return attachment
+    } catch {
+      return nil
+    }
+  }
+  
+  // MARK: - Utiilities
+  
+  func showErrorMessage(title: String, message: String, VC: UIViewController) {
+    let alert: UIAlertController = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.alert)
+    let okAction = UIAlertAction(title: "OK", style: UIAlertAction.Style.default) {
+      UIAlertAction in
+      self.cancel()
+    }
+    alert.addAction(okAction)
+    VC.present(alert, animated: true, completion: nil)
+  }
+
+  func formatFileSize(bytes: Double) -> String {
+    guard bytes > 0 else {
+      return "0 bytes"
+    }
+
+    // Adapted from http://stackoverflow.com/a/18650828
+    let suffixes = ["bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
+    let k: Double = 1024
+    let i = floor(log(bytes) / log(k))
+
+    // Format number with thousands separator and everything below 1 GB with no decimal places.
+    let numberFormatter = NumberFormatter()
+    numberFormatter.maximumFractionDigits = i < 3 ? 0 : 1
+    numberFormatter.numberStyle = .decimal
+
+    let numberString = numberFormatter.string(from: NSNumber(value: bytes / pow(k, i))) ?? "Unknown"
+    let suffix = suffixes[Int(i)]
+    return "\(numberString) \(suffix)"
+  }
+}
+
+extension ShareViewController: TeamsViewControllerDelegate {
+  func selectedTeam(deck: Item) {
+    selectedTeam = deck
+    selectedChannel = nil
+    self.getChannelsFromServerAndReload(forTeamId: deck.id!)
+    reloadConfigurationItems()
+    popConfigurationViewController()
+  }
+}
+
+extension ShareViewController: ChannelsViewControllerDelegate {
+  func selectedChannel(deck: Item) {
+    selectedChannel = deck
+    reloadConfigurationItems()
+    popConfigurationViewController()
+  }
+}

ios/MattermostShare/TeamsViewController.swift

@@ -0,0 +1,57 @@
+import UIKit
+
+class TeamsViewController: UIViewController {
+  
+  lazy var tableView: UITableView = {
+    let tableView = UITableView(frame: self.view.frame)
+    tableView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+    tableView.dataSource = self
+    tableView.delegate = self
+    tableView.backgroundColor = .clear
+    tableView.register(UITableViewCell.self, forCellReuseIdentifier: Identifiers.TeamCell)
+    return tableView
+  }()
+  var teamDecks = [Item]()
+  weak var delegate: TeamsViewControllerDelegate?
+  
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    
+    title = "Teams"
+    view.addSubview(tableView)
+  }
+  
+}
+
+private extension TeamsViewController {
+  struct Identifiers {
+    static let TeamCell = "teamCell"
+  }
+}
+
+extension TeamsViewController: UITableViewDataSource {
+  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+    return teamDecks.count
+  }
+  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+    let cell = tableView.dequeueReusableCell(withIdentifier: Identifiers.TeamCell, for: indexPath)
+    cell.textLabel?.text = teamDecks[indexPath.row].title
+    if teamDecks[indexPath.row].selected {
+      cell.accessoryType = .checkmark
+    } else {
+      cell.accessoryType = .none
+    }
+    cell.backgroundColor = .clear
+    return cell
+  }
+}
+
+protocol TeamsViewControllerDelegate: class {
+  func selectedTeam(deck: Item)
+}
+
+extension TeamsViewController: UITableViewDelegate {
+  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+    delegate?.selectedTeam(deck: teamDecks[indexPath.row])
+  }
+}

ios/UploadAttachments/UploadAttachments.xcodeproj/project.pbxproj

@@ -0,0 +1,371 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 50;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		7FABE04E2213818A00D0F595 /* MattermostBucket.m in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE04C2213818900D0F595 /* MattermostBucket.m */; };
+		7FABE055221387B500D0F595 /* Constants.m in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE053221387B400D0F595 /* Constants.m */; };
+		7FABE058221388D700D0F595 /* UploadSessionManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE057221388D600D0F595 /* UploadSessionManager.swift */; };
+		7FABE05B2213892200D0F595 /* AttachmentItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE0592213892100D0F595 /* AttachmentItem.swift */; };
+		7FABE05C2213892200D0F595 /* AttachmentArray.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE05A2213892100D0F595 /* AttachmentArray.swift */; };
+		7FABE0F7221466F900D0F595 /* UploadManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE0F6221466F900D0F595 /* UploadManager.swift */; };
+		7FABE0FA2214674200D0F595 /* StoreManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE0F82214674200D0F595 /* StoreManager.m */; };
+		7FABE0FC2214800F00D0F595 /* UploadSession.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7FABE0FB2214800F00D0F595 /* UploadSession.swift */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		7FABE03422137F2900D0F595 /* CopyFiles */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "include/$(PRODUCT_NAME)";
+			dstSubfolderSpec = 16;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		7FABE03622137F2900D0F595 /* libUploadAttachments.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libUploadAttachments.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		7FABE04B2213818900D0F595 /* UploadAttachments-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "UploadAttachments-Bridging-Header.h"; sourceTree = "<group>"; };
+		7FABE04C2213818900D0F595 /* MattermostBucket.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MattermostBucket.m; sourceTree = "<group>"; };
+		7FABE04D2213818A00D0F595 /* MattermostBucket.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MattermostBucket.h; sourceTree = "<group>"; };
+		7FABE053221387B400D0F595 /* Constants.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = Constants.m; sourceTree = "<group>"; };
+		7FABE054221387B500D0F595 /* Constants.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Constants.h; sourceTree = "<group>"; };
+		7FABE057221388D600D0F595 /* UploadSessionManager.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UploadSessionManager.swift; sourceTree = "<group>"; };
+		7FABE0592213892100D0F595 /* AttachmentItem.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AttachmentItem.swift; sourceTree = "<group>"; };
+		7FABE05A2213892100D0F595 /* AttachmentArray.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AttachmentArray.swift; sourceTree = "<group>"; };
+		7FABE0F6221466F900D0F595 /* UploadManager.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UploadManager.swift; sourceTree = "<group>"; };
+		7FABE0F82214674200D0F595 /* StoreManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = StoreManager.m; sourceTree = "<group>"; };
+		7FABE0F92214674200D0F595 /* StoreManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StoreManager.h; sourceTree = "<group>"; };
+		7FABE0FB2214800F00D0F595 /* UploadSession.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UploadSession.swift; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		7FABE03322137F2900D0F595 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		7FABE02D22137F2900D0F595 = {
+			isa = PBXGroup;
+			children = (
+				7FABE03822137F2900D0F595 /* UploadAttachments */,
+				7FABE03722137F2900D0F595 /* Products */,
+			);
+			sourceTree = "<group>";
+		};
+		7FABE03722137F2900D0F595 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				7FABE03622137F2900D0F595 /* libUploadAttachments.a */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		7FABE03822137F2900D0F595 /* UploadAttachments */ = {
+			isa = PBXGroup;
+			children = (
+				7FABE05A2213892100D0F595 /* AttachmentArray.swift */,
+				7FABE0592213892100D0F595 /* AttachmentItem.swift */,
+				7FABE054221387B500D0F595 /* Constants.h */,
+				7FABE053221387B400D0F595 /* Constants.m */,
+				7FABE04D2213818A00D0F595 /* MattermostBucket.h */,
+				7FABE04C2213818900D0F595 /* MattermostBucket.m */,
+				7FABE0F92214674200D0F595 /* StoreManager.h */,
+				7FABE0F82214674200D0F595 /* StoreManager.m */,
+				7FABE04B2213818900D0F595 /* UploadAttachments-Bridging-Header.h */,
+				7FABE0F6221466F900D0F595 /* UploadManager.swift */,
+				7FABE057221388D600D0F595 /* UploadSessionManager.swift */,
+				7FABE0FB2214800F00D0F595 /* UploadSession.swift */,
+			);
+			path = UploadAttachments;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		7FABE03522137F2900D0F595 /* UploadAttachments */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 7FABE03D22137F2900D0F595 /* Build configuration list for PBXNativeTarget "UploadAttachments" */;
+			buildPhases = (
+				7FABE03222137F2900D0F595 /* Sources */,
+				7FABE03322137F2900D0F595 /* Frameworks */,
+				7FABE0472213800800D0F595 /* Generate header files */,
+				7FABE03422137F2900D0F595 /* CopyFiles */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = UploadAttachments;
+			productName = UploadAttachments;
+			productReference = 7FABE03622137F2900D0F595 /* libUploadAttachments.a */;
+			productType = "com.apple.product-type.library.static";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		7FABE02E22137F2900D0F595 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastSwiftUpdateCheck = 1010;
+				LastUpgradeCheck = 1010;
+				ORGANIZATIONNAME = Mattermost;
+				TargetAttributes = {
+					7FABE03522137F2900D0F595 = {
+						CreatedOnToolsVersion = 10.1;
+						LastSwiftMigration = 1010;
+					};
+				};
+			};
+			buildConfigurationList = 7FABE03122137F2900D0F595 /* Build configuration list for PBXProject "UploadAttachments" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+			);
+			mainGroup = 7FABE02D22137F2900D0F595;
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+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				7FABE03522137F2900D0F595 /* UploadAttachments */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		7FABE0472213800800D0F595 /* Generate header files */ = {
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+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = "Generate header files";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "# Type a script or drag a script file from your workspace to insert its path.\n\ntarget_dir=${BUILT_PRODUCTS_DIR}/include/${PRODUCT_MODULE_NAME}/\n\n# Ensure the target include path exists\nmkdir -p ${target_dir}\n\n# Copy any file that looks like a Swift generated header to the include path\ncp ${DERIVED_SOURCES_DIR}/*-Swift.h ${target_dir}\n";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
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+			files = (
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+				7FABE0FA2214674200D0F595 /* StoreManager.m in Sources */,
+				7FABE058221388D700D0F595 /* UploadSessionManager.swift in Sources */,
+				7FABE0F7221466F900D0F595 /* UploadManager.swift in Sources */,
+				7FABE04E2213818A00D0F595 /* MattermostBucket.m in Sources */,
+				7FABE055221387B500D0F595 /* Constants.m in Sources */,
+				7FABE05B2213892200D0F595 /* AttachmentItem.swift in Sources */,
+				7FABE0FC2214800F00D0F595 /* UploadSession.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin XCBuildConfiguration section */
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+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
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+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
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+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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+				IPHONEOS_DEPLOYMENT_TARGET = 10.3;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				VALIDATE_PRODUCT = YES;
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+			name = Release;
+		};
+		7FABE03E22137F2900D0F595 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = UQ8HT4Q2XM;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				MODULEMAP_FILE = "$(SRCROOT)/UploadAttachments/module.modulemap";
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "UploadAttachments/UploadAttachments-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.2;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		7FABE03F22137F2900D0F595 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = UQ8HT4Q2XM;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				MODULEMAP_FILE = "$(SRCROOT)/UploadAttachments/module.modulemap";
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "UploadAttachments/UploadAttachments-Bridging-Header.h";
+				SWIFT_VERSION = 4.2;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		7FABE03122137F2900D0F595 /* Build configuration list for PBXProject "UploadAttachments" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
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+				7FABE03C22137F2900D0F595 /* Release */,
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+			defaultConfigurationName = Release;
+		};
+		7FABE03D22137F2900D0F595 /* Build configuration list for PBXNativeTarget "UploadAttachments" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
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+				7FABE03F22137F2900D0F595 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 7FABE02E22137F2900D0F595 /* Project object */;
+}

ios/UploadAttachments/UploadAttachments.xcodeproj/xcshareddata/xcschemes/UploadAttachments.xcscheme

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1010"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7FABE03522137F2900D0F595"
+               BuildableName = "libUploadAttachments.a"
+               BlueprintName = "UploadAttachments"
+               ReferencedContainer = "container:UploadAttachments.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7FABE03522137F2900D0F595"
+            BuildableName = "libUploadAttachments.a"
+            BlueprintName = "UploadAttachments"
+            ReferencedContainer = "container:UploadAttachments.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7FABE03522137F2900D0F595"
+            BuildableName = "libUploadAttachments.a"
+            BlueprintName = "UploadAttachments"
+            ReferencedContainer = "container:UploadAttachments.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

ios/UploadAttachments/UploadAttachments/AttachmentArray.swift

@@ -0,0 +1,269 @@
+/// A thread-safe array.
+public class AttachmentArray<Element>: NSObject {
+    fileprivate let queue = DispatchQueue(label: "com.mattermost.SynchronizedArray", attributes: .concurrent)
+    fileprivate var array = [Element]()
+    
+    public override init() {}
+}
+
+// MARK: - Properties
+public extension AttachmentArray {
+    
+    /// The first element of the collection.
+    var first: Element? {
+        var result: Element?
+        queue.sync { result = self.array.first }
+        return result
+    }
+    
+    /// The last element of the collection.
+    var last: Element? {
+        var result: Element?
+        queue.sync { result = self.array.last }
+        return result
+    }
+    
+    /// The number of elements in the array.
+    var count: Int {
+        var result = 0
+        queue.sync { result = self.array.count }
+        return result
+    }
+    
+    /// A Boolean value indicating whether the collection is empty.
+    var isEmpty: Bool {
+        var result = false
+        queue.sync { result = self.array.isEmpty }
+        return result
+    }
+}
+
+// MARK: - Immutable
+public extension AttachmentArray {
+    /// Returns the first element of the sequence that satisfies the given predicate or nil if no such element is found.
+    ///
+    /// - Parameter predicate: A closure that takes an element of the sequence as its argument and returns a Boolean value indicating whether the element is a match.
+    /// - Returns: The first match or nil if there was no match.
+    func first(where predicate: (Element) -> Bool) -> Element? {
+        var result: Element?
+        queue.sync { result = self.array.first(where: predicate) }
+        return result
+    }
+    
+    /// Returns an array containing, in order, the elements of the sequence that satisfy the given predicate.
+    ///
+    /// - Parameter isIncluded: A closure that takes an element of the sequence as its argument and returns a Boolean value indicating whether the element should be included in the returned array.
+    /// - Returns: An array of the elements that includeElement allowed.
+    func filter(_ isIncluded: (Element) -> Bool) -> [Element] {
+        var result = [Element]()
+        queue.sync { result = self.array.filter(isIncluded) }
+        return result
+    }
+    
+    /// Returns the first index in which an element of the collection satisfies the given predicate.
+    ///
+    /// - Parameter predicate: A closure that takes an element as its argument and returns a Boolean value that indicates whether the passed element represents a match.
+    /// - Returns: The index of the first element for which predicate returns true. If no elements in the collection satisfy the given predicate, returns nil.
+    func index(where predicate: (Element) -> Bool) -> Int? {
+        var result: Int?
+        queue.sync { result = self.array.index(where: predicate) }
+        return result
+    }
+    
+    /// Returns the elements of the collection, sorted using the given predicate as the comparison between elements.
+    ///
+    /// - Parameter areInIncreasingOrder: A predicate that returns true if its first argument should be ordered before its second argument; otherwise, false.
+    /// - Returns: A sorted array of the collection’s elements.
+    func sorted(by areInIncreasingOrder: (Element, Element) -> Bool) -> [Element] {
+        var result = [Element]()
+        queue.sync { result = self.array.sorted(by: areInIncreasingOrder) }
+        return result
+    }
+    
+    /// Returns an array containing the non-nil results of calling the given transformation with each element of this sequence.
+    ///
+    /// - Parameter transform: A closure that accepts an element of this sequence as its argument and returns an optional value.
+    /// - Returns: An array of the non-nil results of calling transform with each element of the sequence.
+    func flatMap<ElementOfResult>(_ transform: (Element) -> ElementOfResult?) -> [ElementOfResult] {
+        var result = [ElementOfResult]()
+        queue.sync { result = self.array.flatMap(transform) }
+        return result
+    }
+    
+    /// Calls the given closure on each element in the sequence in the same order as a for-in loop.
+    ///
+    /// - Parameter body: A closure that takes an element of the sequence as a parameter.
+    func forEach(_ body: (Element) -> Void) {
+        queue.sync { self.array.forEach(body) }
+    }
+    
+    /// Returns a Boolean value indicating whether the sequence contains an element that satisfies the given predicate.
+    ///
+    /// - Parameter predicate: A closure that takes an element of the sequence as its argument and returns a Boolean value that indicates whether the passed element represents a match.
+    /// - Returns: true if the sequence contains an element that satisfies predicate; otherwise, false.
+    func contains(where predicate: (Element) -> Bool) -> Bool {
+        var result = false
+        queue.sync { result = self.array.contains(where: predicate) }
+        return result
+    }
+}
+
+// MARK: - Mutable
+public extension AttachmentArray {
+    
+    /// Adds a new element at the end of the array.
+    ///
+    /// - Parameter element: The element to append to the array.
+    func append( _ element: Element) {
+        queue.async(flags: .barrier) {
+            self.array.append(element)
+        }
+    }
+    
+    /// Adds a new element at the end of the array.
+    ///
+    /// - Parameter element: The element to append to the array.
+    func append( _ elements: [Element]) {
+        queue.async(flags: .barrier) {
+            self.array += elements
+        }
+    }
+    
+    /// Inserts a new element at the specified position.
+    ///
+    /// - Parameters:
+    ///   - element: The new element to insert into the array.
+    ///   - index: The position at which to insert the new element.
+    func insert( _ element: Element, at index: Int) {
+        queue.async(flags: .barrier) {
+            self.array.insert(element, at: index)
+        }
+    }
+    
+    /// Removes and returns the element at the specified position.
+    ///
+    /// - Parameters:
+    ///   - index: The position of the element to remove.
+    ///   - completion: The handler with the removed element.
+    func remove(at index: Int, completion: ((Element) -> Void)? = nil) {
+        queue.async(flags: .barrier) {
+            let element = self.array.remove(at: index)
+            
+            DispatchQueue.main.async {
+                completion?(element)
+            }
+        }
+    }
+    
+    /// Removes and returns the element at the specified position.
+    ///
+    /// - Parameters:
+    ///   - predicate: A closure that takes an element of the sequence as its argument and returns a Boolean value indicating whether the element is a match.
+    ///   - completion: The handler with the removed element.
+    func remove(where predicate: @escaping (Element) -> Bool, completion: ((Element) -> Void)? = nil) {
+        queue.async(flags: .barrier) {
+            guard let index = self.array.index(where: predicate) else { return }
+            let element = self.array.remove(at: index)
+            
+            DispatchQueue.main.async {
+                completion?(element)
+            }
+        }
+    }
+    
+    /// Removes all elements from the array.
+    ///
+    /// - Parameter completion: The handler with the removed elements.
+    func removeAll(completion: (([Element]) -> Void)? = nil) {
+        queue.async(flags: .barrier) {
+            let elements = self.array
+            self.array.removeAll()
+            
+            DispatchQueue.main.async {
+                completion?(elements)
+            }
+        }
+    }
+}
+
+public extension AttachmentArray {
+    
+    /// Accesses the element at the specified position if it exists.
+    ///
+    /// - Parameter index: The position of the element to access.
+    /// - Returns: optional element if it exists.
+    subscript(index: Int) -> Element? {
+        get {
+            var result: Element?
+            
+            queue.sync {
+                guard self.array.startIndex..<self.array.endIndex ~= index else { return }
+                result = self.array[index]
+            }
+            
+            return result
+        }
+        set {
+            guard let newValue = newValue else { return }
+            
+            queue.async(flags: .barrier) {
+                self.array[index] = newValue
+            }
+        }
+    }
+}
+
+
+// MARK: - Equatable
+public extension AttachmentArray where Element: Equatable {
+    
+    /// Returns a Boolean value indicating whether the sequence contains the given element.
+    ///
+    /// - Parameter element: The element to find in the sequence.
+    /// - Returns: true if the element was found in the sequence; otherwise, false.
+    func contains(_ element: Element) -> Bool {
+        var result = false
+        queue.sync { result = self.array.contains(element) }
+        return result
+    }
+}
+
+// MARK: - Infix operators
+public extension AttachmentArray {
+    
+    static func +=(left: inout AttachmentArray, right: Element) {
+        left.append(right)
+    }
+    
+    static func +=(left: inout AttachmentArray, right: [Element]) {
+        left.append(right)
+    }
+}
+
+extension AttachmentArray {
+    public func findBy(type: String) -> Bool {
+        var found = false
+        
+        self.queue.sync {
+            found = self.array.contains {element in
+                let attachment = element as! AttachmentItem
+                return attachment.type == type
+            }
+        }
+        
+        return found
+    }
+    
+    public func hasAttachementLargerThan(fileSize: UInt64) -> Bool {
+        var exceed = false
+        
+        self.queue.sync {
+            exceed = self.array.contains { element in
+                let attachment = element as! AttachmentItem
+                return attachment.fileSize > fileSize
+            }
+        }
+        
+        return exceed
+    }
+}

ios/UploadAttachments/UploadAttachments/AttachmentItem.swift

@@ -0,0 +1,11 @@
+import Foundation
+
+public class AttachmentItem: NSObject {
+    public var fileName: String?
+    public var fileURL: URL?
+    public var fileSize: UInt64 = 0
+    public var type: String?
+    
+    public override init() {}
+}
+

ios/UploadAttachments/UploadAttachments/Constants.h

@@ -0,0 +1,7 @@
+#import <Foundation/Foundation.h>
+
+
+@interface Constants : NSObject
+extern NSString *APP_GROUP_ID;
+extern UInt64 DEFAULT_SERVER_MAX_FILE_SIZE;
+@end

ios/UploadAttachments/UploadAttachments/Constants.m

@@ -0,0 +1,6 @@
+#import "Constants.h"
+
+@implementation Constants
+NSString *APP_GROUP_ID = @"group.com.mattermost.rnbeta";
+UInt64 DEFAULT_SERVER_MAX_FILE_SIZE = 50 * 1024 * 1024;
+@end

ios/UploadAttachments/UploadAttachments/MattermostBucket.h

@@ -0,0 +1,12 @@
+#import <Foundation/Foundation.h>
+
+@interface MattermostBucket :  NSObject
+- (NSUserDefaults *)bucketByName:(NSString*)name;
+-(id) getPreference:(NSString *)key;
+-(NSString *)readFromFile:(NSString *)fileName;
+-(NSDictionary *)readFromFileAsJSON:(NSString *)fileName;
+-(void)removeFile:(NSString *)fileName;
+-(void)removePreference:(NSString *)key;
+-(void)setPreference:(NSString *)key value:(NSString *) value;
+-(void)writeToFile:(NSString *)fileName content:(NSString *)content;
+@end

ios/UploadAttachments/UploadAttachments/MattermostBucket.m

@@ -0,0 +1,69 @@
+#import "Constants.h"
+#import "MattermostBucket.h"
+
+@implementation MattermostBucket
+
+-(NSUserDefaults *)bucketByName:(NSString*)name {
+  return [[NSUserDefaults alloc] initWithSuiteName: name];
+}
+
+-(NSString *)fileUrl:(NSString *)fileName {
+  NSURL *fileManagerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:APP_GROUP_ID];
+  return [NSString stringWithFormat:@"%@/%@", fileManagerURL.path, fileName];
+}
+
+-(id) getPreference:(NSString *)key {
+  NSUserDefaults* bucket = [self bucketByName: APP_GROUP_ID];
+  return [bucket objectForKey:key];
+}
+
+-(NSString *)readFromFile:(NSString *)fileName {
+  NSString *filePath = [self fileUrl:fileName];
+  NSFileManager *fileManager= [NSFileManager defaultManager];
+  if(![fileManager fileExistsAtPath:filePath]) {
+    return nil;
+  }
+  return [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
+}
+
+-(NSDictionary *)readFromFileAsJSON:(NSString *)fileName {
+  NSString *filePath = [self fileUrl:fileName];
+  NSFileManager *fileManager= [NSFileManager defaultManager];
+  if(![fileManager fileExistsAtPath:filePath]) {
+    return nil;
+  }
+  NSData *data = [NSData dataWithContentsOfFile:filePath];
+  return [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+}
+
+-(void)removeFile:(NSString *)fileName {
+  NSString *filePath = [self fileUrl:fileName];
+  NSFileManager *fileManager= [NSFileManager defaultManager];
+  if([fileManager isDeletableFileAtPath:filePath]) {
+    [fileManager removeItemAtPath:filePath error:nil];
+  }
+}
+
+-(void) removePreference:(NSString *)key {
+  NSUserDefaults* bucket = [self bucketByName: APP_GROUP_ID];
+  [bucket removeObjectForKey: key];
+}
+
+-(void) setPreference:(NSString *)key value:(NSString *) value {
+  NSUserDefaults* bucket = [self bucketByName: APP_GROUP_ID];
+  if (bucket && [key length] > 0 && [value length] > 0) {
+    [bucket setObject:value forKey:key];
+  }
+}
+
+-(void)writeToFile:(NSString *)fileName content:(NSString *)content {
+  NSString *filePath = [self fileUrl:fileName];
+  NSFileManager *fileManager= [NSFileManager defaultManager];
+  if(![fileManager fileExistsAtPath:filePath]) {
+    [fileManager createFileAtPath:filePath contents:nil attributes:nil];
+  }
+  if ([content length] > 0) {
+    [content writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
+  }
+}
+@end

ios/UploadAttachments/UploadAttachments/StoreManager.h

@@ -0,0 +1,22 @@
+#import <Foundation/Foundation.h>
+#import "MattermostBucket.h"
+
+@interface StoreManager : NSObject
+@property MattermostBucket *bucket;
+@property (nonatomic, strong) NSDictionary *entities;
+
++(instancetype)shared;
+-(NSDictionary *)getChannelById:(NSString *)channelId;
+-(NSDictionary *)getChannelsBySections:(NSString *)forTeamId;
+-(NSDictionary *)getCurrentChannel;
+-(NSString *)getCurrentChannelId;
+-(NSString *)getCurrentTeamId;
+-(NSString *)getCurrentUserId;
+-(NSDictionary *)getDefaultChannel:(NSString *)forTeamId;
+-(NSDictionary *)getEntities:(BOOL)loadFromFile;
+-(UInt64)getMaxFileSize;
+-(NSArray *)getMyTeams;
+-(NSString *)getServerUrl;
+-(NSString *)getToken;
+-(void)updateEntities:(NSString *)content;
+@end

ios/UploadAttachments/UploadAttachments/StoreManager.m

@@ -0,0 +1,303 @@
+#import "StoreManager.h"
+#import "Constants.h"
+
+@implementation StoreManager
++(instancetype)shared {
+  static id manager = nil;
+  static dispatch_once_t once;
+  dispatch_once(&once, ^{
+    manager = [[self alloc] init];
+  });
+  
+  return manager;
+}
+
+-(instancetype)init {
+  self = [super init];
+  if (self) {
+    self.bucket = [[MattermostBucket alloc] init];
+    [self getEntities:true];
+  }
+  return self;
+}
+
+#pragma public methods
+
+-(NSDictionary *)getChannelById:(NSString *)channelId {
+  NSDictionary *channelsStore = [self.entities objectForKey:@"channels"];
+  NSDictionary *channels = [channelsStore objectForKey:@"channels"];
+  
+  for (NSString * key in channels) {
+    NSDictionary *channel = channels[key];
+    NSString *channel_id = [channel objectForKey:@"id"];
+    if ([channel_id isEqualToString:channelId]) {
+      return channel;
+    }
+  }
+  
+  return nil;
+}
+
+-(NSDictionary *)getChannelsBySections:(NSString *)forTeamId {
+  NSDictionary *channelsStore = [self.entities objectForKey:@"channels"];
+  NSString *currentUserId = [self getCurrentUserId];
+  NSDictionary *channels = [channelsStore objectForKey:@"channels"];
+  NSMutableDictionary *channelsInTeam = [[NSMutableDictionary alloc] init];
+  NSMutableArray *publicChannels = [[NSMutableArray alloc] init];
+  NSMutableArray *privateChannels = [[NSMutableArray alloc] init];
+  NSMutableArray *directChannels = [[NSMutableArray alloc] init];
+  
+  for (NSString * key in channels) {
+    NSMutableDictionary *channel = [[channels objectForKey:key] mutableCopy];
+    NSString *team_id = [channel objectForKey:@"team_id"];
+    NSString *channelType = [channel objectForKey:@"type"];
+    BOOL isDM = [channelType isEqualToString:@"D"];
+    BOOL isGM = [channelType isEqualToString:@"G"];
+    BOOL isPublic = [channelType isEqualToString:@"O"];
+    BOOL isPrivate = [channelType isEqualToString:@"P"];
+    if ([team_id isEqualToString:forTeamId] || isDM || isGM) {
+      if (isPublic) {
+        // public channel
+        [publicChannels addObject:channel];
+      } else if (isPrivate) {
+        // private channel
+        [privateChannels addObject:channel];
+      } else if (isDM) {
+        // direct message
+        NSString *otherUserId = [self getOtherUserIdFromChannel:currentUserId withChannelName:[channel objectForKey:@"name"]];
+        NSDictionary *otherUser = [self getUserById:otherUserId];
+        if (otherUser) {
+          [channel setObject:[self displayUserName:otherUser] forKey:@"display_name"];
+          [directChannels addObject:channel];
+        }
+      } else {
+        [channel setObject:[self completeDirectGroupInfo:key] forKey:@"display_name"];
+        [directChannels addObject:channel];
+      }
+    }
+  }
+  
+  [channelsInTeam setObject:[self sortDictArrayByDisplayName:publicChannels] forKey:@"public"];
+  [channelsInTeam setObject:[self sortDictArrayByDisplayName:privateChannels] forKey:@"private"];
+  [channelsInTeam setObject:[self sortDictArrayByDisplayName:directChannels] forKey:@"direct"];
+  
+  return channelsInTeam;
+}
+
+-(NSDictionary *)getCurrentChannel {
+  NSString *currentChannelId = [self getCurrentChannelId];
+  return [self getChannelById:currentChannelId];
+}
+
+
+
+-(NSString *)getCurrentChannelId {
+  return [[self.entities objectForKey:@"channels"] objectForKey:@"currentChannelId"];
+}
+
+-(NSString *)getCurrentTeamId {
+  return [[self.entities objectForKey:@"teams"] objectForKey:@"currentTeamId"];
+}
+
+-(NSString *)getCurrentUserId {
+  return [[self.entities objectForKey:@"users"] objectForKey:@"currentUserId"];
+}
+
+-(NSDictionary *)getDefaultChannel:(NSString *)forTeamId {
+  NSArray *channelsInTeam = [self getChannelsInTeam:forTeamId];
+  NSPredicate *filter = [NSPredicate predicateWithFormat:@"name = %@", @"town-square"];
+  NSArray *townSquare = [channelsInTeam filteredArrayUsingPredicate:filter];
+  if (townSquare != nil && townSquare.count > 0) {
+    return townSquare.firstObject;
+  }
+  
+  return nil;
+}
+
+-(NSDictionary *)getEntities:(BOOL)loadFromFile {
+  if (loadFromFile) {
+    self.entities = [self.bucket readFromFileAsJSON:@"entities"];
+  }
+  return self.entities;
+}
+
+-(NSArray *)getMyTeams {
+  NSDictionary *teamsStore = [self.entities objectForKey:@"teams"];
+  NSDictionary *teams = [teamsStore objectForKey:@"teams"];
+  NSDictionary *membership = [teamsStore objectForKey:@"myMembers"];
+  NSMutableArray *myTeams = [[NSMutableArray alloc] init];
+  
+  for (NSString* key in teams) {
+    NSDictionary *member = [membership objectForKey:key];
+    NSDictionary *team = [teams objectForKey:key];
+    if (member) {
+      [myTeams addObject:team];
+    }
+  }
+
+  
+  return [self sortDictArrayByDisplayName:myTeams];
+}
+
+-(NSString *)getServerUrl {
+  NSDictionary *general = [self.entities objectForKey:@"general"];
+  NSDictionary *credentials = [general objectForKey:@"credentials"];
+  
+  return [credentials objectForKey:@"url"];
+}
+
+-(NSString *)getToken {
+  NSDictionary *general = [self.entities objectForKey:@"general"];
+  NSDictionary *credentials = [general objectForKey:@"credentials"];
+  
+  return [credentials objectForKey:@"token"];
+}
+
+-(UInt64)getMaxFileSize {
+  NSDictionary *config = [self getConfig];
+  if (config != nil && [config objectForKey:@"MaxFileSize"]) {
+    NSString *maxFileSize = [config objectForKey:@"MaxFileSize"];
+    NSScanner *scanner = [NSScanner scannerWithString:maxFileSize];
+    unsigned long long convertedValue = 0;
+    [scanner scanUnsignedLongLong:&convertedValue];
+    return convertedValue;
+  }
+  
+  return DEFAULT_SERVER_MAX_FILE_SIZE;
+}
+
+-(void)updateEntities:(NSString *)content {
+    [self.bucket writeToFile:@"entities" content:content];
+}
+
+#pragma utilities
+
+-(NSString *)completeDirectGroupInfo:(NSString *)channelId {
+  NSDictionary *usersStore = [self.entities objectForKey:@"users"];
+  NSDictionary *profilesInChannels = [usersStore objectForKey:@"profilesInChannel"];
+  NSDictionary *profileIds = [profilesInChannels objectForKey:channelId];
+  NSDictionary *channel = [self getChannelById:channelId];
+  NSString *currentUserId = [self getCurrentUserId];
+  NSMutableArray *result = [[NSMutableArray alloc] init];
+  
+  if (profileIds) {
+    for (NSString *key in profileIds) {
+      NSDictionary *user = [self getUserById:key];
+      NSString *userId = [user objectForKey:@"id"];
+      if (![userId isEqualToString:currentUserId]) {
+        NSString *fullName = [self getUserFullName:user];
+        [result addObject:fullName];
+      }
+    }
+  }
+  
+  if ([result count] != ([profileIds count] - 1)) {
+    return [channel objectForKey:@"display_name"];
+  }
+  
+  NSArray *sorted = [result sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
+  return [sorted componentsJoinedByString:@", "];
+}
+
+-(NSString *)displayUserName:(NSDictionary *)user {
+  NSString *teammateNameDisplay = [self getTeammateNameDisplaySetting];
+  NSString *username = [user objectForKey:@"username"];
+  NSString *name;
+  
+  if ([teammateNameDisplay isEqualToString:@"nickname_full_name"]) {
+    name = [user objectForKey:@"nickname"] ?: [self getUserFullName:user];
+  } else if ([teammateNameDisplay isEqualToString:@"full_name"]) {
+    name = [self getUserFullName:user];
+  } else {
+    name = username;
+  }
+  
+  if (!name || [[name stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length] == 0) {
+    name = username;
+  }
+  
+  return name;
+}
+
+-(NSArray *)getChannelsInTeam:(NSString *) teamId {
+  NSDictionary *channels = [[self.entities objectForKey:@"channels"] objectForKey:@"channels"];
+  NSArray *arr = [channels allValues];
+  NSPredicate *filter = [NSPredicate predicateWithFormat:@"team_id = %@", teamId];
+  
+  return [arr filteredArrayUsingPredicate:filter];
+}
+
+-(NSDictionary *)getConfig {
+  return [[self.entities objectForKey:@"general"] objectForKey:@"config"];
+}
+
+-(NSDictionary *)getMyPreferences {
+  return [[self.entities objectForKey:@"preferences"] objectForKey:@"myPreferences"];
+}
+
+-(NSString *)getOtherUserIdFromChannel:(NSString *)currentUserId withChannelName:(NSString *)channelName {
+  NSArray *ids = [channelName componentsSeparatedByString:@"_"];
+  if ([ids[0] isEqualToString:currentUserId]) {
+    return ids[2];
+  }
+  
+  return ids[0];
+}
+
+-(NSDictionary *)getUserById:(NSString *)userId {
+  NSDictionary *usersStore = [self.entities objectForKey:@"users"];
+  NSDictionary *users = [usersStore objectForKey:@"profiles"];
+  
+  for (NSString* key in users) {
+    NSDictionary *user = [users objectForKey:key];
+    NSString *user_id = [user objectForKey:@"id"];
+    if ([user_id isEqualToString:userId]) {
+      return user;
+    }
+  }
+  
+  return nil;
+}
+
+-(NSString *)getUserFullName:(NSDictionary*) user {
+  NSString *fistName = [user objectForKey:@"first_name"];
+  NSString *lastName = [user objectForKey:@"last_name"];
+  
+  if (fistName && lastName) {
+    return [fistName stringByAppendingFormat:@" %@", lastName];
+  } else if (fistName) {
+    return fistName;
+  } else if (lastName) {
+    return lastName;
+  }
+  
+  return @"";
+}
+
+-(NSString *)getTeammateNameDisplaySetting {
+  NSDictionary *config = [self getConfig];
+  NSString *teammateNameDisplay = [config objectForKey:@"TeammateNameDisplay"];
+  
+  NSDictionary *preferences = [self getMyPreferences];
+  NSString *key = @"display_settings--name_format";
+  NSDictionary *displayFormat = [preferences objectForKey:key];
+  
+  if (displayFormat) {
+    return [displayFormat objectForKey:@"value"];
+  } else if (teammateNameDisplay) {
+    return teammateNameDisplay;
+  }
+  
+  return @"username";
+}
+
+-(NSArray *)sortDictArrayByDisplayName:(NSArray *)array {
+  NSSortDescriptor *sd = [[NSSortDescriptor alloc]
+                          initWithKey:@"display_name"
+                          ascending:YES
+                          selector: @selector(localizedCaseInsensitiveCompare:)];
+  NSArray *sortDescriptor = [NSArray arrayWithObjects:sd, nil];
+  return [array sortedArrayUsingDescriptors:sortDescriptor];
+}
+
+@end

ios/UploadAttachments/UploadAttachments/UploadAttachments-Bridging-Header.h

@@ -0,0 +1,7 @@
+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+
+#import "Constants.h"
+#import "MattermostBucket.h"
+#import "StoreManager.h"

ios/UploadAttachments/UploadAttachments/UploadManager.swift

@@ -0,0 +1,41 @@
+import Foundation
+import UIKit
+
+@objc @objcMembers public class UploadManager: NSObject {
+    public class var shared :UploadManager {
+        struct Singleton {
+            static let instance = UploadManager()
+        }
+        return Singleton.instance
+    }
+
+    public func uploadFiles(baseURL: String, token: String, channelId: String, message: String?, attachments: AttachmentArray<AttachmentItem>, callback: () -> Void) {
+        let identifier = "mattermost-share-upload-\(UUID().uuidString)"
+        UploadSessionManager.shared.createUploadSessionData(
+            identifier: identifier,
+            channelId: channelId,
+            message: message ?? "",
+            totalFiles: attachments.count
+        )
+
+        if attachments.count > 0 {
+            // if the share action has attachments we upload the files first
+            let uploadSession = UploadSession.shared.createURLSession(identifier: identifier)
+
+            for index in 0..<attachments.count {
+                guard let item = attachments[index] else {return}
+                let url = URL(string: "\(baseURL)/api/v4/files?channel_id=\(channelId)&filename=\(item.fileName!)")
+                var uploadRequest = URLRequest(url: url!)
+                uploadRequest.httpMethod = "POST"
+                uploadRequest.addValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+
+                let task = uploadSession.uploadTask(with: uploadRequest, fromFile: item.fileURL!)
+                task.resume()
+            }
+        } else if message != nil {
+            // if the share action only has a message we post it
+            UploadSession.shared.createPost(identifier: identifier)
+        }
+        callback()
+    }
+}

ios/UploadAttachments/UploadAttachments/UploadSession.swift

@@ -0,0 +1,102 @@
+import UIKit
+
+@objc @objcMembers public class UploadSession: NSObject, URLSessionDataDelegate {
+    public class var shared :UploadSession {
+        struct Singleton {
+            static let instance = UploadSession()
+        }
+        return Singleton.instance
+    }
+    var completionHandler: (() -> Void)?
+    public var session: URLSession?
+    
+    public func createPost(identifier: String) {
+        let store = StoreManager.shared() as StoreManager
+        let _ = store.getEntities(true)
+        let serverURL = store.getServerUrl()
+        let sessionToken = store.getToken()
+        let urlString = "\(serverURL!)/api/v4/posts"
+        
+        guard let uploadSessionData = UploadSessionManager.shared.getUploadSessionData(identifier: identifier) else {return}
+        guard let url = URL(string: urlString) else {return}
+        
+        if uploadSessionData.message != "" || uploadSessionData.fileIds.count > 0 {
+            let jsonObject: [String: Any] = [
+                "channel_id": uploadSessionData.channelId as Any,
+                "message": uploadSessionData.message as Any,
+                "file_ids": uploadSessionData.fileIds
+            ]
+            if !JSONSerialization.isValidJSONObject(jsonObject) {return}
+            
+            var request = URLRequest(url: url)
+            request.httpMethod = "POST"
+            request.setValue("Bearer \(sessionToken!)", forHTTPHeaderField: "Authorization")
+            request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
+            request.httpBody = try? JSONSerialization.data(withJSONObject: jsonObject, options: .prettyPrinted)
+            URLSession(configuration: .ephemeral).dataTask(with: request).resume()
+
+            UploadSessionManager.shared.removeUploadSessionData(identifier: identifier)
+            UploadSessionManager.shared.clearTempDirectory()
+        }
+    }
+    
+    public func attachSession(identifier: String, completionHandler: @escaping () -> Void) {
+        self.completionHandler = completionHandler
+        let sessionConfig = URLSessionConfiguration.background(withIdentifier: identifier)
+        sessionConfig.sharedContainerIdentifier = APP_GROUP_ID
+        if #available(iOS 11.0, *) {
+            sessionConfig.waitsForConnectivity = true
+        }
+
+        session = URLSession(configuration: sessionConfig, delegate: self, delegateQueue: OperationQueue.main)
+    }
+    
+    public func createURLSession(identifier: String) -> URLSession {
+        let sessionConfig = URLSessionConfiguration.background(withIdentifier: identifier)
+        sessionConfig.sharedContainerIdentifier = APP_GROUP_ID
+        if #available(iOS 11.0, *) {
+            sessionConfig.waitsForConnectivity = true
+        }
+
+        self.session = URLSession(configuration: sessionConfig, delegate: self, delegateQueue: nil)
+        return self.session!
+    }
+    
+    public func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        // here we should get the file Id and update it in the session
+        guard let identifier = session.configuration.identifier else {return}
+            do {
+                let jsonObject = try JSONSerialization.jsonObject(with: data, options: []) as! NSDictionary
+                let fileInfos = jsonObject.object(forKey: "file_infos") as! NSArray
+                if fileInfos.count > 0 {
+                    let fileInfoData = fileInfos[0] as! NSDictionary
+                    let fileId = fileInfoData.object(forKey: "id") as! String
+                    UploadSessionManager.shared.appendCompletedUploadToSession(identifier: identifier, fileId: fileId)
+                }
+            } catch {
+                print("MMLOG: Failed to get the file upload response %@", error.localizedDescription)
+            }
+
+    }
+    
+    public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        if error == nil {
+            let identifier = session.configuration.identifier!
+            guard let sessionData = UploadSessionManager.shared.getUploadSessionData(identifier: identifier) else {return}
+            if sessionData.fileIds.count == sessionData.totalFiles {
+                ProcessInfo().performExpiringActivity(withReason: "Need to post the message") { (expires) in
+                    self.createPost(identifier: identifier)
+                }
+            }
+        }
+    }
+    
+    public func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
+        DispatchQueue.main.async {
+            
+            if self.completionHandler != nil {
+                self.completionHandler!()
+            }
+        }
+    }
+}

ios/UploadAttachments/UploadAttachments/UploadSessionManager.swift

@@ -0,0 +1,79 @@
+import Foundation
+
+@objc public class UploadSessionData: NSObject {
+    public var channelId: String?
+    public var fileIds: [String] = []
+    public var message: String = ""
+    public var totalFiles: Int = 0
+}
+
+@objc @objcMembers public class UploadSessionManager: NSObject {
+    private let bucket = MattermostBucket().bucket(byName: APP_GROUP_ID)
+    
+    public class var shared :UploadSessionManager {
+        struct Singleton {
+            static let instance = UploadSessionManager()
+        }
+        return Singleton.instance
+    }
+    
+    public func createUploadSessionData(identifier: String, channelId: String, message: String, totalFiles: Int) {
+        let fileIds: [String] = []
+        let uploadSessionData:  NSDictionary = [
+            "channelId": channelId,
+            "fileIds": fileIds,
+            "message": message,
+            "totalFiles": totalFiles
+        ]
+        bucket?.set(uploadSessionData, forKey: identifier)
+        bucket?.synchronize()
+    }
+    
+    public func getUploadSessionData(identifier: String) -> UploadSessionData? {
+        let dictionary = bucket?.object(forKey: identifier) as? NSDictionary
+        let sessionData = UploadSessionData()
+
+        sessionData.channelId = dictionary?.object(forKey: "channelId") as? String
+        sessionData.fileIds = dictionary?.object(forKey: "fileIds") as? [String] ?? []
+        sessionData.message = dictionary?.object(forKey: "message") as! String
+        sessionData.totalFiles = dictionary?.object(forKey: "totalFiles") as! Int
+
+        return sessionData
+    }
+    
+    public func removeUploadSessionData(identifier: String) {
+        bucket?.removeObject(forKey: identifier)
+        bucket?.synchronize()
+    }
+
+    public func appendCompletedUploadToSession(identifier: String, fileId: String) {
+        let uploadSessionData = bucket?.object(forKey: identifier) as? NSDictionary
+        if (uploadSessionData != nil) {
+            let newData = uploadSessionData?.mutableCopy() as! NSMutableDictionary
+            var fileIds = newData.object(forKey: "fileIds") as! [String]
+            fileIds.append(fileId)
+            newData.setValue(fileIds, forKey: "fileIds")
+            bucket?.set(newData, forKey: identifier)
+            bucket?.synchronize()
+        }
+    }
+    
+    public func tempContainerURL() -> URL? {
+        let filemgr = FileManager.default
+        let containerURL = filemgr.containerURL(forSecurityApplicationGroupIdentifier: APP_GROUP_ID)
+        guard let tempDirectoryURL = containerURL?.appendingPathComponent("shareTempItems") else {return nil}
+        var isDirectory = ObjCBool(false)
+        let exists = filemgr.fileExists(atPath: tempDirectoryURL.path, isDirectory: &isDirectory)
+        if !exists && !isDirectory.boolValue {
+            try? filemgr.createDirectory(atPath: tempDirectoryURL.path, withIntermediateDirectories: true, attributes: nil)
+        }
+        
+        return tempDirectoryURL
+    }
+    
+    public func clearTempDirectory() {
+        guard let tempURL = tempContainerURL() else {return}
+        let fileMgr = FileManager.default
+        try? fileMgr.removeItem(atPath: tempURL.path)
+    }
+}

package-lock.json

@@ -12098,14 +12098,6 @@
         "prop-types": "^15.6.1"
       }
     },
-    "react-native-tableview": {
-      "version": "2.4.1",
-      "resolved": "https://registry.npmjs.org/react-native-tableview/-/react-native-tableview-2.4.1.tgz",
-      "integrity": "sha512-TrCUPYbWFBYGg0ZBZ6TDEwBA1+xksSk0ffpwMJNav9q6GQOD0t6eMXCkHMxA5vkBo3+i+fwWQd0sSVHYdZuPbA==",
-      "requires": {
-        "prop-types": "^15.6.2"
-      }
-    },
     "react-native-vector-icons": {
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/react-native-vector-icons/-/react-native-vector-icons-6.3.0.tgz",

package.json

@@ -53,7 +53,6 @@
     "react-native-slider": "0.11.0",
     "react-native-status-bar-size": "0.3.3",
     "react-native-svg": "9.2.4",
-    "react-native-tableview": "2.4.1",
     "react-native-vector-icons": "6.3.0",
     "react-native-video": "4.4.0",
     "react-native-webview": "5.2.1",

share.ios.js

@@ -1,8 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import {AppRegistry} from 'react-native';
-
-import ShareExtension from 'share_extension/ios';
-
-AppRegistry.registerComponent('MattermostShare', () => ShareExtension);

share_extension/ios/error_message.js

@@ -1,86 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-import React from 'react';
-import PropTypes from 'prop-types';
-import {TouchableOpacity, View} from 'react-native';
-
-import {Preferences} from 'mattermost-redux/constants';
-
-import FormattedText from 'app/components/formatted_text';
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-
-export default function errorMessage(props) {
-    const {close} = props;
-    const theme = Preferences.THEMES.default;
-    const styles = getStyleSheet(theme);
-
-    return (
-        <View style={styles.errorWrapper}>
-            <View style={styles.errorContainer}>
-                <View style={styles.errorContent}>
-                    <View style={styles.errorMessage}>
-                        <FormattedText
-                            style={styles.errorMessageText}
-                            id={'mobile.share_extension.error_message'}
-                            defaultMessage={'An error has occurred while using the share extension.'}
-                        />
-                    </View>
-                    <TouchableOpacity
-                        style={styles.errorButton}
-                        onPress={() => close()}
-                    >
-                        <FormattedText
-                            style={styles.errorButtonText}
-                            id={'mobile.share_extension.error_close'}
-                            defaultMessage={'Close'}
-                        />
-                    </TouchableOpacity>
-                </View>
-            </View>
-        </View>
-    );
-}
-
-errorMessage.propTypes = {
-    close: PropTypes.func.isRequired,
-};
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        errorButton: {
-            alignItems: 'center',
-            justifyContent: 'center',
-            borderTopWidth: 2,
-            borderTopColor: changeOpacity(theme.linkColor, 0.3),
-            paddingVertical: 15,
-        },
-        errorButtonText: {
-            color: changeOpacity(theme.linkColor, 0.7),
-            fontSize: 18,
-        },
-        errorContainer: {
-            borderRadius: 5,
-            backgroundColor: 'white',
-            marginHorizontal: 35,
-        },
-        errorContent: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.05),
-        },
-        errorMessage: {
-            alignItems: 'center',
-            justifyContent: 'center',
-            padding: 25,
-        },
-        errorMessageText: {
-            color: theme.centerChannelColor,
-            fontSize: 16,
-            textAlign: 'center',
-        },
-        errorWrapper: {
-            flex: 1,
-            alignItems: 'center',
-            justifyContent: 'center',
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.5),
-        },
-    };
-});

share_extension/ios/extension.js

@@ -1,164 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import PropTypes from 'prop-types';
-import {Animated, Dimensions, NavigatorIOS, StyleSheet, View} from 'react-native';
-import {intlShape} from 'react-intl';
-
-import {Preferences} from 'mattermost-redux/constants';
-
-import initialState from 'app/initial_state';
-import mattermostBucket from 'app/mattermost_bucket';
-
-import ExtensionPost from './extension_post';
-
-const {View: AnimatedView} = Animated;
-
-export default class SharedApp extends PureComponent {
-    static propTypes = {
-        appGroupId: PropTypes.string.isRequired,
-        onClose: PropTypes.func.isRequired,
-    };
-
-    static contextTypes = {
-        intl: intlShape,
-    };
-
-    constructor(props) {
-        super(props);
-
-        const {height, width} = Dimensions.get('window');
-        const isLandscape = width > height;
-
-        this.state = {
-            backdropOpacity: new Animated.Value(0),
-            containerOpacity: new Animated.Value(0),
-            isLandscape,
-        };
-
-        mattermostBucket.readFromFile('entities', props.appGroupId).then((value) => {
-            this.entities = value || initialState.entities;
-            this.setState({init: true});
-        });
-    }
-
-    componentDidMount() {
-        Animated.parallel([
-            Animated.timing(this.state.backdropOpacity, {
-                toValue: 0.5,
-                duration: 100,
-            }),
-            Animated.timing(this.state.containerOpacity, {
-                toValue: 1,
-                duration: 250,
-            }),
-        ]).start();
-    }
-
-    onLayout = (e) => {
-        const {height, width} = e.nativeEvent.layout;
-        const isLandscape = width > height;
-        if (this.state.isLandscape !== isLandscape) {
-            this.setState({isLandscape});
-        }
-    };
-
-    userIsLoggedIn = () => {
-        if (
-            this.entities &&
-            this.entities.general &&
-            this.entities.general.credentials &&
-            this.entities.general.credentials.token &&
-            this.entities.general.credentials.url
-        ) {
-            return true;
-        }
-
-        return false;
-    };
-
-    render() {
-        const {init, isLandscape} = this.state;
-        const {intl} = this.context;
-        const {formatMessage} = intl;
-
-        if (!init) {
-            return null;
-        }
-
-        const title = formatMessage({
-            id: 'mobile.extension.title',
-            defaultMessage: 'Share in Mattermost',
-        });
-
-        const theme = Preferences.THEMES.default;
-
-        const initialRoute = {
-            component: ExtensionPost,
-            title,
-            passProps: {
-                authenticated: this.userIsLoggedIn(),
-                entities: this.entities,
-                onClose: this.props.onClose,
-                isLandscape,
-                theme,
-                title,
-            },
-            wrapperStyle: {
-                borderRadius: 10,
-                backgroundColor: theme.centerChannelBg,
-            },
-        };
-
-        return (
-            <View
-                style={styles.flex}
-                onLayout={this.onLayout}
-            >
-                <AnimatedView style={[styles.backdrop, {opacity: this.state.backdropOpacity}]}/>
-                <View style={styles.wrapper}>
-                    <AnimatedView
-                        style={[
-                            styles.container,
-                            {
-                                opacity: this.state.containerOpacity,
-                                height: this.userIsLoggedIn() ? 250 : 130,
-                                top: isLandscape ? 20 : 65,
-                            },
-                        ]}
-                    >
-                        <NavigatorIOS
-                            initialRoute={initialRoute}
-                            style={styles.flex}
-                            navigationBarHidden={true}
-                        />
-                    </AnimatedView>
-                </View>
-            </View>
-        );
-    }
-}
-
-const styles = StyleSheet.create({
-    flex: {
-        flex: 1,
-    },
-    backdrop: {
-        position: 'absolute',
-        flex: 1,
-        backgroundColor: '#000',
-        height: '100%',
-        width: '100%',
-    },
-    wrapper: {
-        flex: 1,
-        marginHorizontal: 20,
-    },
-    container: {
-        backgroundColor: 'white',
-        borderRadius: 10,
-        position: 'relative',
-        width: '100%',
-    },
-});

share_extension/ios/extension_channels.js

@@ -1,347 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import PropTypes from 'prop-types';
-import {
-    ActivityIndicator,
-    Text,
-    View,
-} from 'react-native';
-import DeviceInfo from 'react-native-device-info';
-import {intlShape} from 'react-intl';
-import TableView from 'react-native-tableview';
-import Icon from 'react-native-vector-icons/FontAwesome';
-
-import {General} from 'mattermost-redux/constants';
-
-import SearchBar from 'app/components/search_bar';
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-
-import {
-    getExtensionSortedDirectChannels,
-    getExtensionSortedPrivateChannels,
-    getExtensionSortedPublicChannels,
-} from 'share_extension/common/selectors';
-
-import ExtensionNavBar from './extension_nav_bar';
-
-export default class ExtensionChannels extends PureComponent {
-    static propTypes = {
-        entities: PropTypes.object,
-        currentChannelId: PropTypes.string.isRequired,
-        navigator: PropTypes.object.isRequired,
-        onSelectChannel: PropTypes.func.isRequired,
-        teamId: PropTypes.string.isRequired,
-        theme: PropTypes.object.isRequired,
-        title: PropTypes.string.isRequired,
-    };
-
-    static contextTypes = {
-        intl: intlShape,
-    };
-
-    state = {
-        sections: null,
-    };
-
-    componentWillMount() {
-        this.loadChannels();
-    }
-
-    buildSections = (term = '') => {
-        const {publicChannels: pub, privateChannels: priv, directChannels: dms} = this.state;
-        const sections = [];
-        const publicChannels = this.filterChannels(pub, term);
-        const privateChannels = this.filterChannels(priv, term);
-        const directChannels = this.filterChannels(dms, term);
-
-        if (publicChannels.length) {
-            sections.push({
-                id: 'sidebar.channels',
-                defaultMessage: 'PUBLIC CHANNELS',
-                data: publicChannels.sort(this.sortDisplayName),
-            });
-        }
-
-        if (privateChannels.length) {
-            sections.push({
-                id: 'sidebar.pg',
-                defaultMessage: 'PRIVATE CHANNELS',
-                data: privateChannels.sort(this.sortDisplayName),
-            });
-        }
-
-        if (directChannels.length) {
-            sections.push({
-                id: 'sidebar.direct',
-                defaultMessage: 'DIRECT MESSAGES',
-                data: directChannels.sort(this.sortDisplayName),
-            });
-        }
-
-        this.setState({sections});
-    };
-
-    cancelSearch = () => {
-        this.setState({term: ''});
-        this.buildSections();
-    };
-
-    filterChannels = (channels, term) => {
-        return channels.filter((c) => c.display_name.toLowerCase().includes(term.toLocaleLowerCase()) && c.delete_at === 0);
-    };
-
-    goBack = () => {
-        this.props.navigator.pop();
-    };
-
-    loadChannels = async () => {
-        try {
-            const {entities, teamId} = this.props;
-            const views = {
-                extension: {
-                    selectedTeamId: teamId,
-                },
-            };
-            const state = {entities, views};
-            const publicChannels = getExtensionSortedPublicChannels(state);
-            const privateChannels = getExtensionSortedPrivateChannels(state);
-            const directChannels = getExtensionSortedDirectChannels(state);
-
-            const icons = await Promise.all([
-                Icon.getImageSource('globe', 16, this.props.theme.centerChannelColor),
-                Icon.getImageSource('lock', 16, this.props.theme.centerChannelColor),
-                Icon.getImageSource('user', 16, this.props.theme.centerChannelColor),
-                Icon.getImageSource('users', 16, this.props.theme.centerChannelColor),
-            ]);
-
-            this.publicChannelIcon = icons[0];
-            this.privateChannelIcon = icons[1];
-            this.dmChannelIcon = icons[2];
-            this.gmChannelIcon = icons[3];
-
-            this.setState({
-                publicChannels,
-                privateChannels,
-                directChannels,
-            }, () => {
-                this.buildSections();
-            });
-        } catch (error) {
-            this.setState({error});
-        }
-    };
-
-    handleSearch = (term) => {
-        this.setState({term}, () => {
-            if (this.throttleTimeout) {
-                clearTimeout(this.throttleTimeout);
-            }
-
-            this.throttleTimeout = setTimeout(() => {
-                this.buildSections(term);
-            }, 300);
-        });
-    };
-
-    handleSelectChannel = (selected) => {
-        const {sections} = this.state;
-        const section = sections.find((s) => s.id === selected.detail);
-        if (section) {
-            const channel = section.data.find((c) => c.id === selected.value);
-            if (channel) {
-                this.props.onSelectChannel(channel);
-                this.goBack();
-            }
-        }
-    };
-
-    renderBody = (styles) => {
-        const {theme} = this.props;
-        const {error, sections} = this.state;
-
-        if (error) {
-            return (
-                <View style={styles.errorContainer}>
-                    <Text style={styles.error}>
-                        {error.message}
-                    </Text>
-                </View>
-            );
-        }
-
-        if (!sections) {
-            return (
-                <View style={styles.loadingContainer}>
-                    <ActivityIndicator/>
-                </View>
-            );
-        }
-
-        return (
-            <TableView
-                tableViewStyle={TableView.Consts.Style.Plain}
-                tableViewCellStyle={TableView.Consts.CellStyle.Default}
-                separatorColor={changeOpacity(theme.centerChannelColor, 0.5)}
-                tintColor={theme.linkColor}
-                detailFontSize={16}
-                detailTextColor={theme.centerChannelColor}
-                headerFontSize={15}
-                headerTextColor={changeOpacity(theme.centerChannelColor, 0.6)}
-                style={styles.flex}
-            >
-                <TableView.Header>
-                    <TableView.Cell>{this.renderSearchBar(styles)}</TableView.Cell>
-                </TableView.Header>
-                {this.renderSections()}
-            </TableView>
-        );
-    };
-
-    renderSearchBar = (styles) => {
-        const {formatMessage} = this.context.intl;
-        const {theme} = this.props;
-
-        return (
-            <View style={styles.searchContainer}>
-                <SearchBar
-                    ref='search_bar'
-                    placeholder={formatMessage({id: 'search_bar.search', defaultMessage: 'Search'})}
-                    cancelTitle={formatMessage({id: 'mobile.post.cancel', defaultMessage: 'Cancel'})}
-                    backgroundColor='transparent'
-                    inputHeight={33}
-                    inputStyle={styles.searchBarInput}
-                    placeholderTextColor={changeOpacity(theme.centerChannelColor, 0.5)}
-                    tintColorSearch={changeOpacity(theme.centerChannelColor, 0.5)}
-                    tintColorDelete={changeOpacity(theme.centerChannelColor, 0.3)}
-                    titleCancelColor={theme.linkColor}
-                    onChangeText={this.handleSearch}
-                    onCancelButtonPress={this.cancelSearch}
-                    autoCapitalize='none'
-                    value={this.state.term}
-                />
-            </View>
-        );
-    };
-
-    renderSections = () => {
-        const {formatMessage} = this.context.intl;
-        const {currentChannelId} = this.props;
-        const {sections} = this.state;
-
-        return sections.map((s) => {
-            const items = s.data.map((c) => {
-                let icon;
-                switch (c.type) {
-                case General.OPEN_CHANNEL:
-                    icon = this.publicChannelIcon.uri;
-                    break;
-                case General.PRIVATE_CHANNEL:
-                    icon = this.privateChannelIcon.uri;
-                    break;
-                case General.DM_CHANNEL:
-                    icon = this.dmChannelIcon.uri;
-                    break;
-                case General.GM_CHANNEL:
-                    icon = this.gmChannelIcon.uri;
-                    break;
-                }
-
-                return (
-                    <TableView.Item
-                        key={c.id}
-                        value={c.id}
-                        detail={s.id}
-                        selected={c.id === currentChannelId}
-                        onPress={this.handleSelectChannel}
-                        image={icon}
-                    >
-                        {c.display_name}
-                    </TableView.Item>
-                );
-            });
-
-            return (
-                <TableView.Section
-                    key={s.id}
-                    label={formatMessage({id: s.id, defaultMessage: s.defaultMessage})}
-                    headerHeight={30}
-                >
-                    {items}
-                </TableView.Section>
-            );
-        });
-    };
-
-    sortDisplayName = (a, b) => {
-        const locale = DeviceInfo.getDeviceLocale().split('-')[0];
-        return a.display_name.localeCompare(b.display_name, locale, {numeric: true});
-    };
-
-    render() {
-        const {theme, title} = this.props;
-        const styles = getStyleSheet(theme);
-
-        return (
-            <View style={styles.flex}>
-                <ExtensionNavBar
-                    backButton={true}
-                    onLeftButtonPress={this.goBack}
-                    title={title}
-                    theme={theme}
-                />
-                {this.renderBody(styles)}
-            </View>
-        );
-    }
-}
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        flex: {
-            flex: 1,
-        },
-        separatorContainer: {
-            paddingLeft: 35,
-        },
-        separator: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.2),
-            height: 1,
-        },
-        loadingContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-        },
-        searchContainer: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.2),
-            paddingBottom: 2,
-            paddingHorizontal: 5,
-        },
-        searchBarInput: {
-            backgroundColor: '#fff',
-            color: theme.centerChannelColor,
-            fontSize: 15,
-        },
-        titleContainer: {
-            height: 30,
-        },
-        title: {
-            color: changeOpacity(theme.centerChannelColor, 0.6),
-            fontSize: 15,
-            lineHeight: 30,
-            paddingHorizontal: 15,
-        },
-        errorContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-            paddingHorizontal: 15,
-        },
-        error: {
-            color: theme.errorTextColor,
-            fontSize: 14,
-        },
-    };
-});

share_extension/ios/extension_nav_bar.js

@@ -1,150 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import PropTypes from 'prop-types';
-import {Text, TouchableOpacity, View} from 'react-native';
-import IonIcon from 'react-native-vector-icons/Ionicons';
-
-import {emptyFunction} from 'app/utils/general';
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-
-export default class ExtensionNavBar extends PureComponent {
-    static propTypes = {
-        authenticated: PropTypes.bool,
-        backButton: PropTypes.bool,
-        leftButtonTitle: PropTypes.string,
-        onLeftButtonPress: PropTypes.func,
-        onRightButtonPress: PropTypes.func,
-        rightButtonTitle: PropTypes.string,
-        theme: PropTypes.object.isRequired,
-        title: PropTypes.string,
-    };
-
-    static defaultProps = {
-        backButton: false,
-        onLeftButtonPress: emptyFunction,
-    };
-
-    renderLeftButton = (styles) => {
-        const {backButton, leftButtonTitle, onLeftButtonPress} = this.props;
-        let backComponent;
-        if (backButton) {
-            backComponent = (
-                <IonIcon
-                    name='ios-arrow-back'
-                    style={styles.backButton}
-                />
-            );
-        } else if (leftButtonTitle) {
-            backComponent = (
-                <Text
-                    ellipsisMode='tail'
-                    numberOfLines={1}
-                    style={styles.leftButton}
-                >
-                    {leftButtonTitle}
-                </Text>
-            );
-        }
-
-        if (backComponent) {
-            return (
-                <TouchableOpacity
-                    onPress={onLeftButtonPress}
-                    style={styles.backButtonContainer}
-                >
-                    {backComponent}
-                </TouchableOpacity>
-            );
-        }
-
-        return <View style={styles.backButtonContainer}/>;
-    };
-
-    renderRightButton = (styles) => {
-        const {authenticated, onRightButtonPress, rightButtonTitle} = this.props;
-
-        if (rightButtonTitle && authenticated) {
-            return (
-                <TouchableOpacity
-                    onPress={onRightButtonPress}
-                    style={styles.rightButtonContainer}
-                >
-                    <Text
-                        ellipsisMode='tail'
-                        numberOfLines={1}
-                        style={styles.rightButton}
-                    >
-                        {rightButtonTitle}
-                    </Text>
-                </TouchableOpacity>
-            );
-        }
-
-        return <View style={styles.rightButtonContainer}/>;
-    };
-
-    render() {
-        const {theme, title} = this.props;
-        const styles = getStyleSheet(theme);
-
-        return (
-            <View style={styles.container}>
-                {this.renderLeftButton(styles)}
-                <View style={styles.titleContainer}>
-                    <Text style={styles.title}>
-                        {title}
-                    </Text>
-                </View>
-                {this.renderRightButton(styles)}
-            </View>
-        );
-    }
-}
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        container: {
-            borderBottomColor: changeOpacity(theme.centerChannelColor, 0.2),
-            borderBottomWidth: 1,
-            flexDirection: 'row',
-            height: 45,
-        },
-        backButtonContainer: {
-            justifyContent: 'center',
-            flex: 1,
-            paddingLeft: 15,
-        },
-        titleContainer: {
-            alignItems: 'center',
-            flex: 3,
-            justifyContent: 'center',
-        },
-        backButton: {
-            color: theme.linkColor,
-            fontSize: 34,
-        },
-        leftButton: {
-            color: theme.linkColor,
-            fontSize: 16,
-            fontWeight: '600',
-        },
-        title: {
-            fontSize: 17,
-            fontWeight: '600',
-            textAlign: 'center',
-        },
-        rightButtonContainer: {
-            justifyContent: 'center',
-            flex: 1,
-            paddingRight: 15,
-        },
-        rightButton: {
-            color: theme.linkColor,
-            fontSize: 16,
-            fontWeight: '600',
-            textAlign: 'right',
-        },
-    };
-});

share_extension/ios/extension_post.js

@@ -1,839 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import PropTypes from 'prop-types';
-import {intlShape} from 'react-intl';
-import {
-    ActivityIndicator,
-    DeviceEventEmitter,
-    Dimensions,
-    Image,
-    NativeModules,
-    ScrollView,
-    Text,
-    TextInput,
-    TouchableHighlight,
-    View,
-} from 'react-native';
-import IonIcon from 'react-native-vector-icons/Ionicons';
-import Video from 'react-native-video';
-import LocalAuth from 'react-native-local-auth';
-import RNFetchBlob from 'rn-fetch-blob';
-
-import {Client4} from 'mattermost-redux/client';
-import {General} from 'mattermost-redux/constants';
-import {getChannel, getDefaultChannel} from 'mattermost-redux/selectors/entities/channels';
-import {getFormattedFileSize, lookupMimeType} from 'mattermost-redux/utils/file_utils';
-import {isMinimumServerVersion} from 'mattermost-redux/utils/helpers';
-
-import mattermostBucket from 'app/mattermost_bucket';
-import {generateId, getAllowedServerMaxFileSize} from 'app/utils/file';
-import {preventDoubleTap} from 'app/utils/tap';
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-import Config from 'assets/config';
-
-import {
-    ExcelSvg,
-    GenericSvg,
-    PdfSvg,
-    PptSvg,
-    ZipSvg,
-} from 'share_extension/common/icons';
-
-import ExtensionChannels from './extension_channels';
-import ExtensionNavBar from './extension_nav_bar';
-import ExtensionTeams from './extension_teams';
-
-const ShareExtension = NativeModules.MattermostShare;
-const MAX_INPUT_HEIGHT = 95;
-const MAX_MESSAGE_LENGTH = 4000;
-const MAX_FILE_SIZE = 20 * 1024 * 1024;
-
-const extensionSvg = {
-    csv: ExcelSvg,
-    pdf: PdfSvg,
-    ppt: PptSvg,
-    pptx: PptSvg,
-    xls: ExcelSvg,
-    xlsx: ExcelSvg,
-    zip: ZipSvg,
-};
-
-export default class ExtensionPost extends PureComponent {
-    static propTypes = {
-        authenticated: PropTypes.bool.isRequired,
-        entities: PropTypes.object,
-        navigator: PropTypes.object.isRequired,
-        onClose: PropTypes.func.isRequired,
-        theme: PropTypes.object.isRequired,
-        title: PropTypes.string,
-    };
-
-    static contextTypes = {
-        intl: intlShape,
-    };
-
-    constructor(props, context) {
-        super(props, context);
-
-        const {height, width} = Dimensions.get('window');
-        const isLandscape = width > height;
-        const entities = props.entities;
-
-        this.useBackgroundUpload = props.authenticated ? isMinimumServerVersion(entities.general.serverVersion, 4, 8) : false;
-
-        this.state = {
-            entities,
-            error: null,
-            files: [],
-            isLandscape,
-            exceededSize: 0,
-            value: '',
-            sending: false,
-        };
-    }
-
-    componentWillMount() {
-        this.event = DeviceEventEmitter.addListener('extensionPostFailed', this.handlePostFailed);
-        this.loadData();
-    }
-
-    componentDidMount() {
-        this.focusInput();
-    }
-
-    componentWillUnmount() {
-        this.event.remove();
-    }
-
-    componentDidUpdate() {
-        this.focusInput();
-    }
-
-    emmAuthenticationIfNeeded = async () => {
-        try {
-            const emmSecured = await mattermostBucket.getPreference('emm', Config.AppGroupId);
-            if (emmSecured) {
-                const {intl} = this.context;
-                await LocalAuth.authenticate({
-                    reason: intl.formatMessage({
-                        id: 'mobile.managed.secured_by',
-                        defaultMessage: 'Secured by {vendor}',
-                    }, {emmSecured}),
-                    fallbackToPasscode: true,
-                    suppressEnterPassword: true,
-                });
-            }
-        } catch (error) {
-            this.props.onClose();
-        }
-    };
-
-    focusInput = () => {
-        if (this.input && !this.input.isFocused()) {
-            this.input.focus();
-        }
-    };
-
-    getInputRef = (ref) => {
-        this.input = ref;
-    };
-
-    getScrollViewRef = (ref) => {
-        this.scrollView = ref;
-    };
-
-    goToChannels = preventDoubleTap(() => {
-        const {navigator, theme} = this.props;
-        const {channel, entities, team} = this.state;
-
-        if (!entities || !team || !channel) {
-            return;
-        }
-
-        navigator.push({
-            component: ExtensionChannels,
-            wrapperStyle: {
-                borderRadius: 10,
-                backgroundColor: theme.centerChannelBg,
-            },
-            passProps: {
-                currentChannelId: channel.id,
-                entities,
-                onSelectChannel: this.selectChannel,
-                teamId: team.id,
-                theme,
-                title: team.display_name,
-            },
-        });
-    });
-
-    goToTeams = preventDoubleTap(() => {
-        const {navigator, theme} = this.props;
-        const {formatMessage} = this.context.intl;
-        const {entities, team} = this.state;
-
-        if (!entities || !team) {
-            return;
-        }
-
-        navigator.push({
-            component: ExtensionTeams,
-            title: formatMessage({id: 'quick_switch_modal.teams', defaultMessage: 'Teams'}),
-            wrapperStyle: {
-                borderRadius: 10,
-                backgroundColor: theme.centerChannelBg,
-            },
-            passProps: {
-                entities,
-                currentTeamId: team.id,
-                onSelectTeam: this.selectTeam,
-                theme,
-            },
-        });
-    });
-
-    handleCancel = preventDoubleTap(() => {
-        this.props.onClose();
-    });
-
-    handleTextChange = (value) => {
-        this.setState({value});
-    };
-
-    handlePostFailed = () => {
-        const {formatMessage} = this.context.intl;
-        this.setState({
-            error: {
-                message: formatMessage({
-                    id: 'mobile.share_extension.post_error',
-                    defaultMessage: 'An error has occurred while posting the message. Please try again.',
-                }),
-            },
-            sending: false,
-        });
-    };
-
-    loadData = async () => {
-        const {entities} = this.state;
-
-        if (this.props.authenticated) {
-            try {
-                const {config, credentials} = entities.general;
-                const {currentUserId} = entities.users;
-                const team = entities.teams.teams[entities.teams.currentTeamId];
-                let channel = entities.channels.channels[entities.channels.currentChannelId];
-                const items = await ShareExtension.data(Config.AppGroupId);
-                const serverMaxFileSize = getAllowedServerMaxFileSize(config);
-                const maxSize = Math.min(MAX_FILE_SIZE, serverMaxFileSize);
-                const text = [];
-                const urls = [];
-                const files = [];
-                let totalSize = 0;
-                let exceededSize = false;
-
-                if (channel && (channel.type === General.GM_CHANNEL || channel.type === General.DM_CHANNEL)) {
-                    channel = getChannel({entities}, channel.id);
-                }
-
-                if (channel.delete_at !== 0) {
-                    channel = getDefaultChannel({entities});
-                }
-
-                for (let i = 0; i < items.length; i++) {
-                    const item = items[i];
-                    switch (item.type) {
-                    case 'public.plain-text':
-                        text.push(item.value);
-                        break;
-                    case 'public.url':
-                        urls.push(item.value);
-                        break;
-                    default: {
-                        const fullPath = item.value;
-                        const filePath = decodeURIComponent(fullPath.replace('file://', ''));
-                        const fileSize = await RNFetchBlob.fs.stat(filePath); // eslint-disable-line no-await-in-loop
-                        const filename = decodeURIComponent(fullPath.replace(/^.*[\\/]/, ''));
-                        const extension = filename.split('.').pop();
-
-                        if (this.useBackgroundUpload) {
-                            if (!exceededSize) {
-                                exceededSize = fileSize.size >= maxSize;
-                            }
-                        } else {
-                            totalSize += fileSize.size;
-                        }
-                        files.push({
-                            extension,
-                            filename,
-                            filePath,
-                            fullPath,
-                            mimeType: lookupMimeType(filename.toLowerCase()),
-                            size: getFormattedFileSize(fileSize),
-                            type: item.type,
-                        });
-                        break;
-                    }
-                    }
-                }
-
-                let value = text.join('\n');
-                if (urls.length) {
-                    value += text.length ? `\n${urls.join('\n')}` : urls.join('\n');
-                }
-
-                Client4.setUrl(credentials.url);
-                Client4.setToken(credentials.token);
-                Client4.setUserId(currentUserId);
-
-                if (!this.useBackgroundUpload) {
-                    exceededSize = totalSize >= maxSize;
-                }
-
-                this.setState({channel, files, team, value, exceededSize});
-            } catch (error) {
-                this.setState({error});
-            }
-        }
-    };
-
-    onLayout = async () => {
-        const isLandscape = await ShareExtension.getOrientation() === 'LANDSCAPE';
-
-        if (this.state.isLandscape !== isLandscape) {
-            if (this.scrollView) {
-                setTimeout(() => {
-                    this.scrollView.scrollTo({y: 0, animated: false});
-                }, 250);
-            }
-            this.setState({isLandscape});
-        }
-    };
-
-    renderBody = (styles) => {
-        const {formatMessage} = this.context.intl;
-        const {authenticated, theme} = this.props;
-        const {entities, error, sending, exceededSize, value} = this.state;
-        const {config} = entities.general;
-        const serverMaxFileSize = getAllowedServerMaxFileSize(config);
-        const maxSize = Math.min(MAX_FILE_SIZE, serverMaxFileSize);
-
-        if (error) {
-            return (
-                <View style={styles.unauthenticatedContainer}>
-                    <Text style={styles.unauthenticated}>
-                        {error.message}
-                    </Text>
-                </View>
-            );
-        }
-
-        if (sending) {
-            return (
-                <View style={styles.sendingContainer}>
-                    <ActivityIndicator/>
-                    <Text style={styles.sendingText}>
-                        {formatMessage({
-                            id: 'mobile.extension.posting',
-                            defaultMessage: 'Posting...',
-                        })}
-                    </Text>
-                </View>
-            );
-        }
-
-        if (exceededSize) {
-            return (
-                <View style={styles.unauthenticatedContainer}>
-                    <Text style={styles.unauthenticated}>
-                        {formatMessage({
-                            id: 'mobile.extension.max_file_size',
-                            defaultMessage: 'File attachments shared in Mattermost must be less than {size}.',
-                        }, {size: getFormattedFileSize({size: maxSize})})}
-                    </Text>
-                </View>
-            );
-        }
-
-        if (authenticated && !error) {
-            return (
-                <ScrollView
-                    ref={this.getScrollViewRef}
-                    contentContainerStyle={styles.scrollView}
-                    style={styles.flex}
-                >
-                    <TextInput
-                        ref={this.getInputRef}
-                        maxLength={MAX_MESSAGE_LENGTH}
-                        multiline={true}
-                        onChangeText={this.handleTextChange}
-                        placeholder={formatMessage({id: 'create_post.write', defaultMessage: 'Write a message...'})}
-                        placeholderTextColor={changeOpacity(theme.centerChannelColor, 0.5)}
-                        style={[styles.input, {maxHeight: MAX_INPUT_HEIGHT}]}
-                        value={value}
-                    />
-                    {this.renderFiles(styles)}
-                </ScrollView>
-            );
-        }
-
-        return (
-            <View style={styles.unauthenticatedContainer}>
-                <Text style={styles.unauthenticated}>
-                    {formatMessage({
-                        id: 'mobile.extension.authentication_required',
-                        defaultMessage: 'Authentication required: Please first login using the app.',
-                    })}
-                </Text>
-            </View>
-        );
-    };
-
-    renderChannelButton = (styles) => {
-        const {formatMessage} = this.context.intl;
-        const {authenticated, theme} = this.props;
-        const {channel, sending} = this.state;
-        const channelName = channel ? channel.display_name : '';
-
-        if (sending) {
-            return null;
-        }
-
-        if (!authenticated) {
-            return null;
-        }
-
-        return (
-            <TouchableHighlight
-                onPress={this.goToChannels}
-                style={styles.buttonContainer}
-                underlayColor={changeOpacity(theme.centerChannelColor, 0.2)}
-            >
-                <View style={styles.buttonWrapper}>
-                    <View style={styles.buttonLabelContainer}>
-                        <Text style={styles.buttonLabel}>
-                            {formatMessage({id: 'mobile.share_extension.channel', defaultMessage: 'Channel'})}
-                        </Text>
-                    </View>
-                    <View style={styles.buttonValueContainer}>
-                        <Text
-                            ellipsizeMode='tail'
-                            numberOfLines={1}
-                            style={styles.buttonValue}
-                        >
-                            {channelName}
-                        </Text>
-                        <View style={styles.arrowContainer}>
-                            <IonIcon
-                                color={changeOpacity(theme.centerChannelColor, 0.4)}
-                                name='ios-arrow-forward'
-                                size={25}
-                            />
-                        </View>
-                    </View>
-                </View>
-            </TouchableHighlight>
-        );
-    };
-
-    renderFiles = (styles) => {
-        const {files} = this.state;
-        return files.map((file, index) => {
-            let component;
-
-            switch (file.type) {
-            case 'public.image':
-                component = (
-                    <View
-                        key={`item-${index}`}
-                        style={styles.imageContainer}
-                    >
-                        <Image
-                            source={{uri: file.fullPath}}
-                            resizeMode='cover'
-                            style={styles.image}
-                        />
-                    </View>
-                );
-                break;
-            case 'public.movie':
-                component = (
-                    <View
-                        key={`item-${index}`}
-                        style={styles.imageContainer}
-                    >
-                        <Video
-                            style={styles.video}
-                            resizeMode='cover'
-                            source={{uri: file.fullPath}}
-                            volume={0}
-                            paused={true}
-                        />
-                    </View>
-                );
-                break;
-            case 'public.file-url': {
-                let SvgIcon = extensionSvg[file.extension];
-                if (!SvgIcon) {
-                    SvgIcon = GenericSvg;
-                }
-
-                component = (
-                    <View
-                        key={`item-${index}`}
-                        style={styles.otherContainer}
-                    >
-                        <View style={styles.otherWrapper}>
-                            <View style={styles.fileIcon}>
-                                <SvgIcon
-                                    width={19}
-                                    height={48}
-                                />
-                            </View>
-                        </View>
-                    </View>
-                );
-                break;
-            }
-            }
-
-            return (
-                <View
-                    style={styles.fileContainer}
-                    key={`item-${index}`}
-                >
-                    {component}
-                    <Text
-                        ellipsisMode='tail'
-                        numberOfLines={1}
-                        style={styles.filename}
-                    >
-                        {`${file.size} - ${file.filename}`}
-                    </Text>
-                </View>
-            );
-        });
-    };
-
-    renderTeamButton = (styles) => {
-        const {formatMessage} = this.context.intl;
-        const {authenticated, theme} = this.props;
-        const {sending, team} = this.state;
-        const teamName = team ? team.display_name : '';
-
-        if (sending) {
-            return null;
-        }
-
-        if (!authenticated) {
-            return null;
-        }
-
-        return (
-            <TouchableHighlight
-                onPress={this.goToTeams}
-                style={styles.buttonContainer}
-                underlayColor={changeOpacity(theme.centerChannelColor, 0.2)}
-            >
-                <View style={styles.buttonWrapper}>
-                    <View style={styles.flex}>
-                        <Text style={styles.buttonLabel}>
-                            {formatMessage({id: 'mobile.share_extension.team', defaultMessage: 'Team'})}
-                        </Text>
-                    </View>
-                    <View style={styles.buttonValueContainer}>
-                        <Text style={styles.buttonValue}>
-                            {teamName}
-                        </Text>
-                        <View style={styles.arrowContainer}>
-                            <IonIcon
-                                color={changeOpacity(theme.centerChannelColor, 0.4)}
-                                name='ios-arrow-forward'
-                                size={25}
-                            />
-                        </View>
-                    </View>
-                </View>
-            </TouchableHighlight>
-        );
-    };
-
-    selectChannel = (channel) => {
-        this.setState({channel});
-    };
-
-    selectTeam = (team, channel) => {
-        this.setState({channel, team, error: null});
-
-        // Update the channels for the team
-        Client4.getMyChannels(team.id).then((channels) => {
-            const defaultChannel = channels.find((c) => c.name === General.DEFAULT_CHANNEL && c.team_id === team.id);
-            this.updateChannelsInEntities(channels);
-            if (!channel) {
-                this.setState({channel: defaultChannel});
-            }
-        }).catch((error) => {
-            const {entities} = this.props;
-            if (entities.channels.channelsInTeam[team.id]) {
-                const townSquare = Object.values(entities.channels.channels).find((c) => {
-                    return c.name === General.DEFAULT_CHANNEL && c.team_id === team.id;
-                });
-
-                if (!channel) {
-                    this.setState({channel: townSquare});
-                }
-            } else {
-                this.setState({error, channel: null});
-            }
-        });
-    };
-
-    sendMessage = preventDoubleTap(async () => {
-        const {authenticated, onClose} = this.props;
-        const {channel, entities, files, value} = this.state;
-        const {currentUserId} = entities.users;
-
-        // If no text and no files do nothing
-        if ((!value && !files.length) || !channel) {
-            return;
-        }
-
-        if (currentUserId && authenticated) {
-            await this.emmAuthenticationIfNeeded();
-            const certificate = await mattermostBucket.getPreference('cert', Config.AppGroupId);
-
-            try {
-                // Check to see if the use still belongs to the channel
-                await Client4.getMyChannelMember(channel.id);
-                const post = {
-                    user_id: currentUserId,
-                    channel_id: channel.id,
-                    message: value,
-                };
-
-                const data = {
-                    files,
-                    post,
-                    requestId: generateId().replace(/-/g, ''),
-                    useBackgroundUpload: this.useBackgroundUpload,
-                    certificate: certificate || '',
-                };
-
-                this.setState({sending: true});
-                onClose(data);
-            } catch (error) {
-                this.setState({error});
-                setTimeout(() => {
-                    onClose();
-                }, 5000);
-            }
-        }
-    });
-
-    updateChannelsInEntities = (newChannels) => {
-        const {entities} = this.state;
-        const newEntities = {
-            ...entities,
-            channels: {
-                ...entities.channels,
-                channels: {...entities.channels.channels},
-                channelsInTeam: {...entities.channels.channelsInTeam},
-            },
-        };
-        const {channels, channelsInTeam} = newEntities.channels;
-
-        newChannels.forEach((c) => {
-            channels[c.id] = c;
-            const channelIdsInTeam = channelsInTeam[c.team_id];
-            if (channelIdsInTeam) {
-                if (!channelIdsInTeam.includes(c.id)) {
-                    channelsInTeam[c.team_id].push(c.id);
-                }
-            } else {
-                channelsInTeam[c.team_id] = [c.id];
-            }
-        });
-
-        this.setState({entities: newEntities});
-        mattermostBucket.writeToFile('entities', JSON.stringify(newEntities), Config.AppGroupId);
-    };
-
-    render() {
-        const {authenticated, theme, title} = this.props;
-        const {channel, error, totalSize, sending} = this.state;
-        const {formatMessage} = this.context.intl;
-        const styles = getStyleSheet(theme);
-
-        let postButtonText = formatMessage({id: 'mobile.share_extension.send', defaultMessage: 'Send'});
-        if (totalSize >= MAX_FILE_SIZE || sending || error || !channel) {
-            postButtonText = null;
-        }
-
-        let cancelButton = formatMessage({id: 'mobile.share_extension.cancel', defaultMessage: 'Cancel'});
-        if (sending) {
-            cancelButton = null;
-        } else if (error) {
-            cancelButton = formatMessage({id: 'mobile.share_extension.error_close', defaultMessage: 'Close'});
-        }
-
-        return (
-            <View
-                onLayout={this.onLayout}
-                style={styles.container}
-            >
-                <ExtensionNavBar
-                    authenticated={authenticated}
-                    leftButtonTitle={cancelButton}
-                    onLeftButtonPress={this.handleCancel}
-                    onRightButtonPress={this.sendMessage}
-                    rightButtonTitle={postButtonText}
-                    theme={theme}
-                    title={title}
-                />
-                {this.renderBody(styles)}
-                {!error && this.renderTeamButton(styles)}
-                {!error && this.renderChannelButton(styles)}
-            </View>
-        );
-    }
-}
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        flex: {
-            flex: 1,
-        },
-        container: {
-            flex: 1,
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.05),
-        },
-        input: {
-            color: theme.centerChannelColor,
-            fontSize: 17,
-            marginBottom: 5,
-            width: '100%',
-        },
-        divider: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.1),
-            height: 1,
-            marginVertical: 5,
-            width: '100%',
-        },
-        scrollView: {
-            paddingHorizontal: 15,
-        },
-        buttonContainer: {
-            borderTopColor: changeOpacity(theme.centerChannelColor, 0.2),
-            borderTopWidth: 1,
-            height: 45,
-            paddingHorizontal: 15,
-        },
-        buttonWrapper: {
-            alignItems: 'center',
-            flex: 1,
-            flexDirection: 'row',
-        },
-        buttonLabelContainer: {
-            flex: 1,
-        },
-        buttonLabel: {
-            fontSize: 17,
-            lineHeight: 45,
-        },
-        buttonValueContainer: {
-            justifyContent: 'flex-end',
-            flex: 1,
-            flexDirection: 'row',
-        },
-        buttonValue: {
-            color: changeOpacity(theme.centerChannelColor, 0.4),
-            alignSelf: 'flex-end',
-            fontSize: 17,
-            lineHeight: 45,
-        },
-        arrowContainer: {
-            height: 45,
-            justifyContent: 'center',
-            marginLeft: 15,
-            top: 2,
-        },
-        unauthenticatedContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-            paddingHorizontal: 15,
-        },
-        unauthenticated: {
-            color: theme.errorTextColor,
-            fontSize: 14,
-        },
-        fileContainer: {
-            alignItems: 'center',
-            backgroundColor: theme.centerChannelBg,
-            borderColor: changeOpacity(theme.centerChannelColor, 0.2),
-            borderRadius: 4,
-            borderWidth: 1,
-            flexDirection: 'row',
-            height: 48,
-            marginBottom: 10,
-            width: '100%',
-        },
-        filename: {
-            color: changeOpacity(theme.centerChannelColor, 0.5),
-            fontSize: 13,
-            flex: 1,
-        },
-        otherContainer: {
-            borderBottomLeftRadius: 4,
-            borderTopLeftRadius: 4,
-            height: 48,
-            marginRight: 10,
-            paddingVertical: 10,
-            width: 38,
-        },
-        otherWrapper: {
-            borderRightWidth: 1,
-            borderRightColor: changeOpacity(theme.centerChannelColor, 0.2),
-            flex: 1,
-        },
-        fileIcon: {
-            alignItems: 'center',
-            justifyContent: 'center',
-            flex: 1,
-        },
-        imageContainer: {
-            borderBottomLeftRadius: 4,
-            borderTopLeftRadius: 4,
-            height: 48,
-            marginRight: 10,
-            width: 38,
-        },
-        image: {
-            alignItems: 'center',
-            height: 48,
-            justifyContent: 'center',
-            overflow: 'hidden',
-            width: 38,
-        },
-        video: {
-            backgroundColor: theme.centerChannelBg,
-            alignItems: 'center',
-            height: 48,
-            justifyContent: 'center',
-            overflow: 'hidden',
-            width: 38,
-        },
-        sendingContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-            paddingHorizontal: 15,
-        },
-        sendingText: {
-            color: theme.centerChannelColor,
-            fontSize: 16,
-            paddingTop: 10,
-        },
-    };
-});

share_extension/ios/extension_team_item.js

@@ -1,119 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React from 'react';
-import PropTypes from 'prop-types';
-import {
-    Text,
-    TouchableHighlight,
-    View,
-} from 'react-native';
-
-import {preventDoubleTap} from 'app/utils/tap';
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-
-import TeamIcon from 'app/components/team_icon/team_icon';
-
-export default class TeamsListItem extends React.PureComponent {
-    static propTypes = {
-        currentTeamId: PropTypes.string.isRequired,
-        onSelectTeam: PropTypes.func.isRequired,
-        team: PropTypes.object.isRequired,
-        theme: PropTypes.object.isRequired,
-    };
-
-    onPress = preventDoubleTap(() => {
-        const {onSelectTeam, team} = this.props;
-        onSelectTeam(team);
-    });
-
-    render() {
-        const {
-            currentTeamId,
-            team,
-            theme,
-        } = this.props;
-        const styles = getStyleSheet(theme);
-
-        const wrapperStyle = [styles.wrapper];
-        if (team.id === currentTeamId) {
-            wrapperStyle.push({
-                width: '90%',
-            });
-        }
-
-        return (
-            <TouchableHighlight
-                underlayColor={changeOpacity(theme.sidebarTextHoverBg, 0.5)}
-                onPress={this.onPress}
-                style={styles.wrapper}
-            >
-                <View style={styles.container}>
-                    <View style={styles.item}>
-                        <TeamIcon
-                            styleContainer={styles.teamIconContainer}
-                            styleText={styles.teamIconText}
-                            styleImage={styles.imageContainer}
-                            teamId={team.id}
-                            team={team}
-                            theme={theme}
-                        />
-                        <Text
-                            style={[styles.text]}
-                            ellipsizeMode='tail'
-                            numberOfLines={1}
-                        >
-                            {team.display_name}
-                        </Text>
-                    </View>
-                </View>
-            </TouchableHighlight>
-        );
-    }
-}
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        wrapper: {
-            height: 45,
-            width: '100%',
-        },
-        container: {
-            flex: 1,
-            flexDirection: 'row',
-            height: 45,
-            paddingHorizontal: 15,
-        },
-        item: {
-            alignItems: 'center',
-            height: 45,
-            flex: 1,
-            flexDirection: 'row',
-        },
-        text: {
-            color: theme.centerChannelColor,
-            flex: 1,
-            fontSize: 16,
-            fontWeight: '600',
-            lineHeight: 16,
-            paddingRight: 5,
-        },
-        teamIconContainer: {
-            backgroundColor: theme.sidebarBg,
-            marginRight: 10,
-        },
-        teamIconText: {
-            color: theme.sidebarText,
-        },
-        imageContainer: {
-            backgroundColor: '#ffffff',
-        },
-        checkmarkContainer: {
-            alignItems: 'flex-end',
-        },
-        checkmark: {
-            color: theme.linkColor,
-            fontSize: 16,
-        },
-    };
-});

share_extension/ios/extension_teams.js

@@ -1,219 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import PropTypes from 'prop-types';
-import {ActivityIndicator, Text, View} from 'react-native';
-import DeviceInfo from 'react-native-device-info';
-import {intlShape} from 'react-intl';
-import TableView from 'react-native-tableview';
-
-import {General} from 'mattermost-redux/constants';
-import {getChannelsInTeam} from 'mattermost-redux/selectors/entities/channels';
-
-import {changeOpacity, makeStyleSheetFromTheme} from 'app/utils/theme';
-
-import ExtensionNavBar from './extension_nav_bar';
-import ExtensionTeamItem from './extension_team_item';
-
-export default class ExtensionTeams extends PureComponent {
-    static propTypes = {
-        currentTeamId: PropTypes.string.isRequired,
-        entities: PropTypes.object,
-        navigator: PropTypes.object.isRequired,
-        onSelectTeam: PropTypes.func.isRequired,
-        theme: PropTypes.object.isRequired,
-    };
-
-    static contextTypes = {
-        intl: intlShape,
-    };
-
-    state = {
-        defaultChannels: null,
-        error: null,
-        myTeams: null,
-    };
-
-    componentWillMount() {
-        this.loadTeams();
-    }
-
-    goBack = () => {
-        this.props.navigator.pop();
-    };
-
-    handleSelectTeam = (team) => {
-        const {defaultChannels} = this.state;
-        const townSquare = defaultChannels[team.id];
-        this.props.onSelectTeam(team, townSquare);
-        this.goBack();
-    };
-
-    loadTeams = async () => {
-        try {
-            const defaultChannels = {};
-            const {teams, myMembers} = this.props.entities.teams;
-            const myTeams = [];
-            const channelsInTeam = getChannelsInTeam({entities: this.props.entities});
-
-            for (const key in teams) {
-                if (teams.hasOwnProperty(key)) {
-                    const team = teams[key];
-                    const belong = myMembers[key];
-                    if (belong) {
-                        const channelIds = channelsInTeam[key];
-                        let channels;
-                        if (channelIds) {
-                            channels = channelIds.map((id) => this.props.entities.channels.channels[id]);
-                            defaultChannels[team.id] = channels.find((channel) => channel.name === General.DEFAULT_CHANNEL);
-                        }
-
-                        myTeams.push(team);
-                    }
-                }
-            }
-
-            this.setState({
-                defaultChannels,
-                myTeams: myTeams.sort(this.sortDisplayName),
-            });
-        } catch (error) {
-            this.setState({error});
-        }
-    };
-
-    renderBody = (styles) => {
-        const {theme} = this.props;
-        const {error, myTeams} = this.state;
-
-        if (error) {
-            return (
-                <View style={styles.errorContainer}>
-                    <Text style={styles.error}>
-                        {error.message}
-                    </Text>
-                </View>
-            );
-        }
-
-        if (!myTeams) {
-            return (
-                <View style={styles.loadingContainer}>
-                    <ActivityIndicator/>
-                </View>
-            );
-        }
-
-        return (
-            <TableView
-                tableViewStyle={TableView.Consts.Style.Plain}
-                tableViewCellStyle={TableView.Consts.CellStyle.Default}
-                separatorColor={changeOpacity(theme.centerChannelColor, 0.5)}
-                tintColor={theme.linkColor}
-                detailFontSize={16}
-                detailTextColor={theme.centerChannelColor}
-                headerFontSize={15}
-                headerTextColor={changeOpacity(theme.centerChannelColor, 0.6)}
-                style={styles.flex}
-            >
-                <TableView.Section>
-                    {this.renderItems(myTeams)}
-                </TableView.Section>
-            </TableView>
-        );
-    };
-
-    renderItems = (myTeams) => {
-        const {currentTeamId, theme} = this.props;
-
-        return myTeams.map((team) => {
-            return (
-                <TableView.Cell
-                    key={team.id}
-                    selected={team.id === currentTeamId}
-                >
-                    <View>
-                        <ExtensionTeamItem
-                            currentTeamId={currentTeamId}
-                            onSelectTeam={this.handleSelectTeam}
-                            team={team}
-                            theme={theme}
-                        />
-                    </View>
-                </TableView.Cell>
-            );
-        });
-    };
-
-    sortDisplayName = (a, b) => {
-        const locale = DeviceInfo.getDeviceLocale().split('-')[0];
-        return a.display_name.localeCompare(b.display_name, locale, {numeric: true});
-    };
-
-    render() {
-        const {formatMessage} = this.context.intl;
-        const {theme} = this.props;
-        const styles = getStyleSheet(theme);
-
-        return (
-            <View style={styles.flex}>
-                <ExtensionNavBar
-                    backButton={true}
-                    onLeftButtonPress={this.goBack}
-                    title={formatMessage({id: 'mobile.drawer.teamsTitle', defaultMessage: 'Teams'})}
-                    theme={theme}
-                />
-                {this.renderBody(styles)}
-            </View>
-        );
-    }
-}
-
-const getStyleSheet = makeStyleSheetFromTheme((theme) => {
-    return {
-        flex: {
-            flex: 1,
-        },
-        separatorContainer: {
-            paddingLeft: 60,
-        },
-        separator: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.2),
-            height: 1,
-        },
-        loadingContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-        },
-        searchContainer: {
-            backgroundColor: changeOpacity(theme.centerChannelColor, 0.2),
-            paddingBottom: 2,
-        },
-        searchBarInput: {
-            backgroundColor: '#fff',
-            color: theme.centerChannelColor,
-            fontSize: 15,
-        },
-        titleContainer: {
-            height: 30,
-        },
-        title: {
-            color: changeOpacity(theme.centerChannelColor, 0.6),
-            fontSize: 15,
-            lineHeight: 30,
-            paddingHorizontal: 15,
-        },
-        errorContainer: {
-            alignItems: 'center',
-            flex: 1,
-            justifyContent: 'center',
-            paddingHorizontal: 15,
-        },
-        error: {
-            color: theme.errorTextColor,
-            fontSize: 14,
-        },
-    };
-});

share_extension/ios/index.js

@@ -1,68 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-import React, {PureComponent} from 'react';
-import {NativeModules} from 'react-native';
-import {IntlProvider} from 'react-intl';
-import DeviceInfo from 'react-native-device-info';
-
-import Config from 'assets/config';
-import {getTranslations} from 'app/i18n';
-import 'app/fetch_preconfig';
-
-import {captureExceptionWithoutState, initializeSentry, LOGGER_EXTENSION} from 'app/utils/sentry';
-
-import ErrorMessage from './error_message';
-import Extension from './extension';
-
-const ShareExtension = NativeModules.MattermostShare;
-
-export class SharedApp extends PureComponent {
-    constructor(props) {
-        super(props);
-
-        initializeSentry();
-
-        this.state = {
-            hasError: false,
-        };
-    }
-
-    componentDidCatch(error) {
-        this.setState({hasError: true});
-
-        captureExceptionWithoutState(error, LOGGER_EXTENSION);
-    }
-
-    close = (data) => {
-        ShareExtension.close(data, Config.AppGroupId);
-    };
-
-    render() {
-        if (this.state.hasError) {
-            return (
-                <ErrorMessage close={this.close}/>
-            );
-        }
-
-        return (
-            <Extension
-                appGroupId={Config.AppGroupId}
-                onClose={this.close}
-            />
-        );
-    }
-}
-
-export default function ShareExtensionProvider() {
-    const locale = DeviceInfo.getDeviceLocale().split('-')[0];
-
-    return (
-        <IntlProvider
-            locale={locale}
-            messages={getTranslations(locale)}
-        >
-            <SharedApp/>
-        </IntlProvider>
-    );
-}