58 lines
2.3 KiB
TypeScript
58 lines
2.3 KiB
TypeScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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import {Q} from '@nozbe/watermelondb';
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import {MM_TABLES} from '@constants/database';
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import type {RecordPair, SanitizeReactionsArgs} from '@typings/database/database';
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import type ReactionModel from '@typings/database/models/servers/reaction';
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const {REACTION} = MM_TABLES.SERVER;
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/**
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* sanitizeReactions: Treats reactions happening on a Post. For example, a user can add/remove an emoji. Hence, this function
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* tell us which reactions to create/delete in the Reaction table and which custom-emoji to create in our database.
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* For more information, please have a look at https://community.mattermost.com/core/pl/rq9e8jnonpyrmnyxpuzyc4d6ko
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* @param {SanitizeReactionsArgs} sanitizeReactions
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* @param {Database} sanitizeReactions.database
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* @param {string} sanitizeReactions.post_id
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* @param {RawReaction[]} sanitizeReactions.rawReactions
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* @returns {Promise<{createReactions: RawReaction[], deleteReactions: Reaction[]}>}
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*/
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export const sanitizeReactions = async ({database, post_id, rawReactions, skipSync}: SanitizeReactionsArgs) => {
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const reactions = (await database.
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get<ReactionModel>(REACTION).
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query(Q.where('post_id', post_id)).
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fetch());
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// similarObjects: Contains objects that are in both the RawReaction array and in the Reaction table
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const similarObjects = new Set<ReactionModel>();
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const createReactions: Array<RecordPair<ReactionModel, Reaction>> = [];
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const reactionsMap = reactions.reduce((result: Record<string, ReactionModel>, reaction) => {
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result[`${reaction.userId}-${reaction.emojiName}`] = reaction;
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return result;
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}, {});
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for (const raw of rawReactions) {
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// If the reaction is not present let's add it to the db
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const exists = reactionsMap[`${raw.user_id}-${raw.emoji_name}`];
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if (exists) {
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similarObjects.add(exists);
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} else {
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createReactions.push({raw});
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}
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}
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if (skipSync) {
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return {createReactions, deleteReactions: []};
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}
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// finding out elements to delete
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const deleteReactions = reactions.
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filter((reaction) => !similarObjects.has(reaction));
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return {createReactions, deleteReactions};
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};
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