98 lines
2.3 KiB
TypeScript
98 lines
2.3 KiB
TypeScript
/**
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* Module dependencies
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*/
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import $ from 'cafy';
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import rap from '@prezzemolo/rap';
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import Post from '../../models/post';
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import ChannelWatching from '../../models/channel-watching';
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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 {any} params
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* @param {any} user
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* @param {any} app
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* @return {Promise<any>}
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*/
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module.exports = async (params, user, app) => {
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// Get 'limit' parameter
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const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
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if (limitErr) throw 'invalid limit param';
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// Get 'since_id' parameter
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const [sinceId, sinceIdErr] = $(params.since_id).optional.id().$;
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if (sinceIdErr) throw 'invalid since_id param';
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// Get 'max_id' parameter
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const [maxId, maxIdErr] = $(params.max_id).optional.id().$;
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if (maxIdErr) throw 'invalid max_id param';
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// Check if both of since_id and max_id is specified
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if (sinceId && maxId) {
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throw 'cannot set since_id and max_id';
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}
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const { followingIds, watchChannelIds } = await rap({
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// ID list of the user itself and other users who the user follows
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followingIds: getFriends(user._id),
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// Watchしているチャンネルを取得
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watchChannelIds: ChannelWatching.find({
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user_id: user._id,
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// 削除されたドキュメントは除く
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deleted_at: { $exists: false }
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}).then(watches => watches.map(w => w.channel_id))
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});
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//#region Construct query
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const sort = {
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_id: -1
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};
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const query = {
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$or: [{
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// フォローしている人のタイムラインへの投稿
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user_id: {
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$in: followingIds
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},
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// 「タイムラインへの」投稿に限定するためにチャンネルが指定されていないもののみに限る
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$or: [{
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channel_id: {
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$exists: false
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}
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}, {
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channel_id: null
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}]
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}, {
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// Watchしているチャンネルへの投稿
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channel_id: {
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$in: watchChannelIds
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}
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}]
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} as any;
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if (sinceId) {
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sort._id = 1;
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query._id = {
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$gt: sinceId
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};
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} else if (maxId) {
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query._id = {
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$lt: maxId
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};
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}
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//#endregion
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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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// Serialize
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const _timeline = await Promise.all(timeline.map(post => serialize(post, user)))
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return _timeline
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};
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