FINAL-PROJECT-BACK/model/chat.js

const Chat = require('./schemas/chat');

const getList = async (
	userId,
	{ sortBy, sortByDesc, filter, limit = '500', page = '1', sub }
) => {
	const options = { owner: userId };
	if (sub) options.subscription = { $all: [sub] };
	const results = await Chat.paginate(options, {
		limit,
		page,
		sort: {
			...(sortBy ? { [`${sortBy}`]: 1 } : {}),
			...(sortByDesc ? { [`${sortByDesc}`]: -1 } : {}),
		},
		select: filter ? filter.split('|').join(' ') : '',
		populate: {
			path: 'owner',
			select: '_id',
		},
	});
	const { docs: chats, totalDocs: total } = results;
	return { total: total.toString(), limit, page, chats };
};

const getByField = async (companionId, userId) => {
	const chat = await Chat.findOne({
		companionId,
		owner: userId,
	});
	return chat;
};

const add = async (obj) => {
	const chat = await Chat.create(obj);
	return chat;
};

const update = async (id, obj) => {
	const chat = await Chat.updateOne({ _id: id }, { ...obj });
	return chat;
};

module.exports = {
	getList,
	getByField,
	add,
	update,
};