Add support for default mentions

Signed-off-by: Alessandro Grassi <alessandro.grassi@2ndquadrant.com>

app/models/messenger.rb

@@ -219,9 +219,12 @@ class Messenger
     result
   end
 
-  def self.mentions(text)
-    return nil if text.nil?
-    names = extract_usernames(text)
+  def self.mentions(project, text)
+    names = []
+    Messenger.textfield_for_project(project, :default_mentions).split(',').each { |m|
+      names.push m.strip
+    }
+    names += extract_usernames(text) unless text.nil?
     names.present? ? '\nTo: ' + names.join(', ') : nil
   end
 

app/models/messenger_setting.rb

@@ -12,6 +12,7 @@ class MessengerSetting < ActiveRecord::Base
                   'messenger_username',
                   'messenger_verify_ssl',
                   'auto_mentions',
+                  'default_mentions',
                   'display_watchers',
                   'post_updates',
                   'new_include_description',
@@ -33,6 +34,7 @@ class MessengerSetting < ActiveRecord::Base
                   :messenger_username,
                   :messenger_verify_ssl,
                   :auto_mentions,
+                  :default_mentions,
                   :display_watchers,
                   :post_updates,
                   :new_include_description,