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/**
* Module dependencies
*/
import $ from 'cafy';
import Post from '../../models/post';
import getFriends from '../../common/get-friends';
import serialize from '../../serializers/post';
/**
* Get timeline of myself
*
* @param {any} params
* @param {any} user
* @param {any} app
* @return {Promise<any>}
*/
module.exports = (params, user, app) => new Promise(async (res, rej) => {
// Get 'limit' parameter
const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
if (limitErr) return rej('invalid limit param');
// Get 'since_id' parameter
const [sinceId, sinceIdErr] = $(params.since_id).optional.id().$;
if (sinceIdErr) return rej('invalid since_id param');
// Get 'max_id' parameter
const [maxId, maxIdErr] = $(params.max_id).optional.id().$;
if (maxIdErr) return rej('invalid max_id param');
// Check if both of since_id and max_id is specified
if (sinceId && maxId) {
return rej('cannot set since_id and max_id');
}
// ID list of the user $self and other users who the user follows
const followingIds = await getFriends(user._id);
// Construct query
const sort = {
_id: -1
};
const query = {
user_id: {
$in: followingIds
}
} as any;
if (sinceId) {
sort._id = 1;
query._id = {
$gt: sinceId
};
} else if (maxId) {
query._id = {
$lt: maxId
};
}
// Issue query
const timeline = await Post
.find(query, {
limit: limit,
sort: sort
});
// Serialize
res(await Promise.all(timeline.map(async post =>
await serialize(post, user)
)));
});
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