64 lines
1.2 KiB
TypeScript
64 lines
1.2 KiB
TypeScript
/**
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* Module dependencies
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*/
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import $ from 'cafy';
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import Post, { pack } from '../../models/post';
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/**
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* Show a context of a post
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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 'postId' parameter
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const [postId, postIdErr] = $(params.postId).id().$;
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if (postIdErr) return rej('invalid postId param');
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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) return rej('invalid limit param');
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// Get 'offset' parameter
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const [offset = 0, offsetErr] = $(params.offset).optional.number().min(0).$;
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if (offsetErr) return rej('invalid offset param');
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// Lookup post
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const post = await Post.findOne({
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_id: postId
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});
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if (post === null) {
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return rej('post not found');
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}
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const context = [];
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let i = 0;
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async function get(id) {
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i++;
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const p = await Post.findOne({ _id: id });
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if (i > offset) {
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context.push(p);
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}
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if (context.length == limit) {
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return;
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}
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if (p.replyId) {
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await get(p.replyId);
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}
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}
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if (post.replyId) {
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await get(post.replyId);
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}
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// Serialize
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res(await Promise.all(context.map(async post =>
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await pack(post, user))));
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});
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