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'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import Post from '../../models/post';
import serialize from '../../serializers/post';
/**
* Show a reposts 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;
}
const since = params.since_id || null;
const max = params.max_id || null;
// Check if both of since_id and max_id is specified
if (since !== null && max !== null) {
return rej('cannot set since_id and max_id');
}
// Lookup post
const post = await Post.findOne({
_id: new mongo.ObjectID(postId)
});
if (post === null) {
return rej('post not found', 'POST_NOT_FOUND');
}
// Construct query
const sort = {
created_at: -1
};
const query = {
repost_id: post._id
};
if (since !== null) {
sort.created_at = 1;
query._id = {
$gt: new mongo.ObjectID(since)
};
} else if (max !== null) {
query._id = {
$lt: new mongo.ObjectID(max)
};
}
// Issue query
const reposts = await Post
.find(query, {
limit: limit,
sort: sort
});
// Serialize
res(await Promise.all(reposts.map(async post =>
await serialize(post, user))));
});
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