RocketChat.addUserToRoom = function(rid, user, inviter) {
	let now = new Date();
	let room = RocketChat.models.Rooms.findOneById(rid);

	// Check if user is already in room
	let subscription = RocketChat.models.Subscriptions.findOneByRoomIdAndUserId(rid, user._id);
	if (subscription) {
		return;
	}

	if (room.t === 'c') {
		RocketChat.callbacks.run('beforeJoinRoom', user, room);
	}

	RocketChat.models.Rooms.addUsernameById(rid, user.username);
	RocketChat.models.Subscriptions.createWithRoomAndUser(room, user, {
		ts: now,
		open: true,
		alert: true,
		unread: 1
	});

	if (inviter) {
		RocketChat.models.Messages.createUserAddedWithRoomIdAndUser(rid, user, {
			ts: now,
			u: {
				_id: inviter._id,
				username: inviter.username
			}
		});
	} else {
		RocketChat.models.Messages.createUserJoinWithRoomIdAndUser(rid, user, { ts: now });
	}

	if (room.t === 'c') {
		Meteor.defer(function() {
			RocketChat.callbacks.run('afterJoinRoom', user, room);
		});
	}

	return true;
};