mattermost-mobile/app/actions/local/reactions.ts

// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {SYSTEM_IDENTIFIERS} from '@constants/database';
import DatabaseManager from '@database/manager';
import {getRecentReactions} from '@queries/servers/system';

const MAXIMUM_RECENT_EMOJI = 27;

export const addRecentReaction = async (serverUrl: string, emojiNames: string[], prepareRecordsOnly = false) => {
    const operator = DatabaseManager.serverDatabases[serverUrl]?.operator;
    if (!operator) {
        return {error: `${serverUrl} database not found`};
    }
    const {database} = operator;

    if (!emojiNames.length) {
        return [];
    }

    let recent = await getRecentReactions(database);

    try {
        const recentEmojis = new Set(recent);
        for (const name of emojiNames) {
            if (recentEmojis.has(name)) {
                recentEmojis.delete(name);
            }
        }

        recent = Array.from(recentEmojis);

        for (const name of emojiNames) {
            recent.unshift(name);
        }
        return operator.handleSystem({
            systems: [{
                id: SYSTEM_IDENTIFIERS.RECENT_REACTIONS,
                value: JSON.stringify(recent.slice(0, MAXIMUM_RECENT_EMOJI)),
            }],
            prepareRecordsOnly,
        });
    } catch (error) {
        return {error};
    }
};