79 lines
1.5 KiB
JavaScript
79 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 getFriends from '../../common/get-friends';
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import serialize from '../../serializers/post';
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/**
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* Get timeline of myself
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*
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* @param {Object} params
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* @param {Object} user
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* @param {Object} app
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* @return {Promise<object>}
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*/
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module.exports = (params, user, app) =>
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new Promise(async (res, rej) =>
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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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const since = params.since_id || null;
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const max = params.max_id || null;
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// Check if both of since_id and max_id is specified
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if (since !== null && max !== null) {
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return rej('cannot set since_id and max_id');
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}
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// ID list of the user itself and other users who the user follows
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const followingIds = await getFriends(user._id);
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// Construct query
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const sort = {
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_id: -1
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};
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const query = {
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user_id: {
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$in: followingIds
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}
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};
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if (since !== null) {
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sort._id = 1;
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query._id = {
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$gt: new mongo.ObjectID(since)
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};
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} else if (max !== null) {
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query._id = {
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$lt: new mongo.ObjectID(max)
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};
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}
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// Issue query
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const timeline = await Post
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.find(query, {}, {
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limit: limit,
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sort: sort
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})
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.toArray();
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// Serialize
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res(await Promise.all(timeline.map(async post =>
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await serialize(post, user)
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)));
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});
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