80 lines
1.7 KiB
TypeScript
80 lines
1.7 KiB
TypeScript
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/**
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* Module dependencies
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*/
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import $ from 'cafy';
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import { default as Channel, IChannel } from '../../models/channel';
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import { default as Post, IPost } from '../../models/post';
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import serialize from '../../serializers/post';
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/**
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* Show a posts of a channel
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*
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* @param {any} params
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* @param {any} user
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* @return {Promise<any>}
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*/
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module.exports = (params, user) => new Promise(async (res, rej) => {
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// Get 'limit' parameter
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const [limit = 1000, limitErr] = $(params.limit).optional.number().range(1, 1000).$;
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if (limitErr) return rej('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) return rej('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) return rej('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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return rej('cannot set since_id and max_id');
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}
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// Get 'channel_id' parameter
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const [channelId, channelIdErr] = $(params.channel_id).id().$;
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if (channelIdErr) return rej('invalid channel_id param');
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// Fetch channel
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const channel: IChannel = await Channel.findOne({
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_id: channelId
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});
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if (channel === null) {
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return rej('channel not found');
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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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channel_id: channel._id
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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 Construct query
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// Issue query
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const posts = 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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res(await Promise.all(posts.map(async (post) =>
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await serialize(post, user)
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)));
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});
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