misskey/src/server/api/endpoints/notes/favorites/delete.ts

import $ from 'cafy';
import ID, { transform } from '../../../../../misc/cafy-id';
import Favorite from '../../../../../models/favorite';
import Note from '../../../../../models/note';
import define from '../../../define';

export const meta = {
	stability: 'stable',

	desc: {
		'ja-JP': '指定した投稿のお気に入りを解除します。',
		'en-US': 'Unfavorite a note.'
	},

	requireCredential: true,

	kind: 'favorite-write',

	params: {
		noteId: {
			validator: $.type(ID),
			transform: transform,
			desc: {
				'ja-JP': '対象の投稿のID',
				'en-US': 'Target note ID.'
			}
		}
	}
};

export default define(meta, (ps, user) => new Promise(async (res, rej) => {
	// Get favoritee
	const note = await Note.findOne({
		_id: ps.noteId
	});

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

	// if already favorited
	const exist = await Favorite.findOne({
		noteId: note._id,
		userId: user._id
	});

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

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

	// Send response
	res();
}));