yumechi-no-kuni/src/api/endpoints/posts/favorites/delete.ts

'use strict';

/**
 * Module dependencies
 */
import it from '../../../it';
import Favorite from '../../../models/favorite';
import Post from '../../../models/post';

/**
 * Unfavorite 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] = it(params.post_id, 'id', true);
		if (postIdErr) return rej('invalid post_id param');

		// Get favoritee
		const post = await Post.findOne({
			_id: postId
		});

		if (post === null) {
			return rej('post not found');
		}

		// if already favorited
		const exist = await Favorite.findOne({
			post_id: post._id,
			user_id: user._id
		});

		if (exist === null) {
			return rej('already not favorited');
		}

		// Delete favorite
		await Favorite.deleteOne({
			_id: exist._id
		});

		// Send response
		res();
	});