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/**
* Module dependencies
*/
import $ from 'cafy';
import Like from '../../../models/like';
import Post from '../../../models/post';
import User from '../../../models/user';
import notify from '../../../common/notify';
/**
* Like 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 likee
const post = await Post.findOne({
_id: postId
});
if (post === null) {
return rej('post not found');
}
// Myself
if (post.user_id.equals(user._id)) {
return rej('-need-translate-');
}
// if already liked
const exist = await Like.findOne({
post_id: post._id,
user_id: user._id,
deleted_at: { $exists: false }
});
if (exist !== null) {
return rej('already liked');
}
// Create like
await Like.insert({
created_at: new Date(),
post_id: post._id,
user_id: user._id
});
// Send response
res();
// Increment likes count
Post.update({ _id: post._id }, {
$inc: {
likes_count: 1
}
});
// Increment user likes count
User.update({ _id: user._id }, {
$inc: {
likes_count: 1
}
});
// Increment user liked count
User.update({ _id: post.user_id }, {
$inc: {
liked_count: 1
}
});
// Notify
notify(post.user_id, user._id, 'like', {
post_id: post._id
});
});
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