78 lines
1.5 KiB
JavaScript
78 lines
1.5 KiB
JavaScript
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'use strict';
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/**
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* Module dependencies
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*/
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import * as mongo from 'mongodb';
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import Post from '../../models/post';
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import Like from '../../models/like';
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import serialize from '../../serializers/user';
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/**
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* Show a likes of a post
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*
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* @param {Object} params
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* @param {Object} user
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* @return {Promise<object>}
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*/
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module.exports = (params, user) =>
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new Promise(async (res, rej) =>
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{
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// Get 'post_id' parameter
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const postId = params.post_id;
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if (postId === undefined || postId === null) {
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return rej('post_id is required');
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}
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// Get 'limit' parameter
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let limit = params.limit;
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if (limit !== undefined && limit !== null) {
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limit = parseInt(limit, 10);
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// From 1 to 100
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if (!(1 <= limit && limit <= 100)) {
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return rej('invalid limit range');
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}
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} else {
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limit = 10;
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}
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// Get 'offset' parameter
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let offset = params.offset;
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if (offset !== undefined && offset !== null) {
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offset = parseInt(offset, 10);
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} else {
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offset = 0;
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}
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// Get 'sort' parameter
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let sort = params.sort || 'desc';
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// Lookup post
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const post = await Post.findOne({
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_id: new mongo.ObjectID(postId)
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});
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if (post === null) {
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return rej('post not found');
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}
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// Issue query
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const likes = await Like
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.find({
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post_id: post._id,
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deleted_at: { $exists: false }
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}, {}, {
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limit: limit,
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skip: offset,
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sort: {
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_id: sort == 'asc' ? 1 : -1
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}
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})
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.toArray();
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// Serialize
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res(await Promise.all(likes.map(async like =>
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await serialize(like.user_id, user))));
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});
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