first part of messaging refactor

src/messaging/unread.js

@@ -0,0 +1,44 @@
+'use strict';
+
+var async = require('async');
+
+var db = require('../database');
+var sockets = require('../socket.io');
+
+module.exports = function(Messaging) {
+
+	Messaging.getUnreadCount = function(uid, callback) {
+		db.sortedSetCard('uid:' + uid + ':chat:rooms:unread', callback);
+	};
+
+	Messaging.pushUnreadCount = function(uid) {
+		Messaging.getUnreadCount(uid, function(err, unreadCount) {
+			if (err) {
+				return;
+			}
+			sockets.in('uid_' + uid).emit('event:unread.updateChatCount', unreadCount);
+		});
+	};
+
+	Messaging.markRead = function(uid, roomId, callback) {
+		db.sortedSetRemove('uid:' + uid + ':chat:rooms:unread', roomId, callback);
+	};
+
+	Messaging.markUnread = function(uids, roomId, callback) {
+		async.waterfall([
+			function (next) {
+				Messaging.roomExists(roomId, next);
+			},
+			function (exists, next) {
+				if (!exists) {
+					return next(new Error('[[error:chat-room-does-not-exist]]'));
+				}
+				var keys = uids.map(function(uid) {
+					return 'uid:' + uid + ':chat:rooms:unread';
+				});
+				db.sortedSetAdd(keys, Date.now(), roomId, next);
+			}
+		], callback);
+	};
+
+};