84 lines
1.5 KiB
JavaScript
84 lines
1.5 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Module dependencies
|
||
|
|
*/
|
||
|
|
import * as mongo from 'mongodb';
|
||
|
|
import Post from '../../models/post';
|
||
|
|
import serialize from '../../serializers/post';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Show a context of a post
|
||
|
|
*
|
||
|
|
* @param {Object} params
|
||
|
|
* @param {Object} user
|
||
|
|
* @return {Promise<object>}
|
||
|
|
*/
|
||
|
|
module.exports = (params, user) =>
|
||
|
|
new Promise(async (res, rej) =>
|
||
|
|
{
|
||
|
|
// Get 'post_id' parameter
|
||
|
|
const postId = params.post_id;
|
||
|
|
if (postId === undefined || postId === null) {
|
||
|
|
return rej('post_id is required');
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get 'limit' parameter
|
||
|
|
let limit = params.limit;
|
||
|
|
if (limit !== undefined && limit !== null) {
|
||
|
|
limit = parseInt(limit, 10);
|
||
|
|
|
||
|
|
// From 1 to 100
|
||
|
|
if (!(1 <= limit && limit <= 100)) {
|
||
|
|
return rej('invalid limit range');
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
limit = 10;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get 'offset' parameter
|
||
|
|
let offset = params.offset;
|
||
|
|
if (offset !== undefined && offset !== null) {
|
||
|
|
offset = parseInt(offset, 10);
|
||
|
|
} else {
|
||
|
|
offset = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Lookup post
|
||
|
|
const post = await Post.findOne({
|
||
|
|
_id: new mongo.ObjectID(postId)
|
||
|
|
});
|
||
|
|
|
||
|
|
if (post === null) {
|
||
|
|
return rej('post not found', '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))));
|
||
|
|
});
|