rudeshark.net/src/server/api/endpoints/channels/posts.ts

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/**
* Module dependencies
*/
import $ from 'cafy';
import { default as Channel, IChannel } from '../../models/channel';
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import Post, { pack } from '../../models/post';
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/**
* Show a posts of a channel
*
* @param {any} params
* @param {any} user
* @return {Promise<any>}
*/
module.exports = (params, user) => new Promise(async (res, rej) => {
// Get 'limit' parameter
const [limit = 1000, limitErr] = $(params.limit).optional.number().range(1, 1000).$;
if (limitErr) return rej('invalid limit param');
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// Get 'sinceId' parameter
const [sinceId, sinceIdErr] = $(params.sinceId).optional.id().$;
if (sinceIdErr) return rej('invalid sinceId param');
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// Get 'untilId' parameter
const [untilId, untilIdErr] = $(params.untilId).optional.id().$;
if (untilIdErr) return rej('invalid untilId param');
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// Check if both of sinceId and untilId is specified
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if (sinceId && untilId) {
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return rej('cannot set sinceId and untilId');
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}
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// Get 'channelId' parameter
const [channelId, channelIdErr] = $(params.channelId).id().$;
if (channelIdErr) return rej('invalid channelId param');
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// Fetch channel
const channel: IChannel = await Channel.findOne({
_id: channelId
});
if (channel === null) {
return rej('channel not found');
}
//#region Construct query
const sort = {
_id: -1
};
const query = {
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channelId: channel._id
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} as any;
if (sinceId) {
sort._id = 1;
query._id = {
$gt: sinceId
};
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} else if (untilId) {
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query._id = {
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$lt: untilId
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};
}
//#endregion Construct query
// Issue query
const posts = await Post
.find(query, {
limit: limit,
sort: sort
});
// Serialize
res(await Promise.all(posts.map(async (post) =>
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await pack(post, user)
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)));
});