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'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import Post from '../../models/post';
import Like from '../../models/like';
import serialize from '../../serializers/user';
/**
* Show a likes 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;
}
// Get 'sort' parameter
let sort = params.sort || 'desc';
// Lookup post
const post = await Post.findOne({
_id: new mongo.ObjectID(postId)
});
if (post === null) {
return rej('post not found');
}
// Issue query
const likes = await Like
.find({
post_id: post._id,
deleted_at: { $exists: false }
}, {
limit: limit,
skip: offset,
sort: {
_id: sort == 'asc' ? 1 : -1
}
});
// Serialize
res(await Promise.all(likes.map(async like =>
await serialize(like.user_id, user))));
});
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