64 lines
1.3 KiB
TypeScript
64 lines
1.3 KiB
TypeScript
/**
|
|
* Module dependencies
|
|
*/
|
|
import $ from 'cafy';
|
|
import Post from '../../models/post';
|
|
import serialize from '../../serializers/post';
|
|
|
|
/**
|
|
* Show a context of a post
|
|
*
|
|
* @param {any} params
|
|
* @param {any} user
|
|
* @return {Promise<any>}
|
|
*/
|
|
module.exports = (params, user) => new Promise(async (res, rej) => {
|
|
// Get 'post_id' parameter
|
|
const [postId, postIdErr] = $(params.post_id).id().$;
|
|
if (postIdErr) return rej('invalid post_id param');
|
|
|
|
// Get 'limit' parameter
|
|
const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
|
|
if (limitErr) return rej('invalid limit param');
|
|
|
|
// Get 'offset' parameter
|
|
const [offset = 0, offsetErr] = $(params.offset).optional.number().min(0).$;
|
|
if (offsetErr) return rej('invalid offset param');
|
|
|
|
// Lookup post
|
|
const post = await Post.findOne({
|
|
_id: postId
|
|
});
|
|
|
|
if (post === null) {
|
|
return rej('post not found');
|
|
}
|
|
|
|
const context = [];
|
|
let i = 0;
|
|
|
|
async function get(id) {
|
|
i++;
|
|
const p = await Post.findOne({ _id: id });
|
|
|
|
if (i > offset) {
|
|
context.push(p);
|
|
}
|
|
|
|
if (context.length == limit) {
|
|
return;
|
|
}
|
|
|
|
if (p.reply_to_id) {
|
|
await get(p.reply_to_id);
|
|
}
|
|
}
|
|
|
|
if (post.reply_to_id) {
|
|
await get(post.reply_to_id);
|
|
}
|
|
|
|
// Serialize
|
|
res(await Promise.all(context.map(async post =>
|
|
await serialize(post, user))));
|
|
});
|