restricting post replies if a thread is locked (returns pid of -1 instead)

src/posts.js

@@ -157,9 +157,9 @@ var	RDB = require('./redis.js'),
 
 	Posts.reply = function(socket, tid, uid, content) {
 		Posts.create(uid, tid, content, function(pid) {
+			if (pid > 0) {
 				RDB.rpush('tid:' + tid + ':posts', pid);
 
-
 				socket.emit('event:alert', {
 					title: 'Reply Successful',
 					message: 'You have successfully replied. Click here to view your reply.',
@@ -189,13 +189,22 @@ var	RDB = require('./redis.js'),
 						]
 					});
 				});
-			
+			} else {
+				socket.emit('event:alert', {
+					title: 'Reply Unsuccessful',
+					message: 'Your reply could not be posted at this time. Please try again later.',
+					type: 'notify',
+					timeout: 2000
+				});
+			}
 		});
 	};
 
 	Posts.create = function(uid, tid, content, callback) {
 		if (uid === null) return;
 		
+		RDB.get('tid:' + tid + ':locked', function(locked) {
+			if (!locked || locked === '0') {
 				RDB.incr('global:next_post_id', function(pid) {
 					// Posts Info
 					RDB.set('pid:' + pid + ':content', content);
@@ -213,6 +222,10 @@ var	RDB = require('./redis.js'),
 					if (callback) 
 						callback(pid);
 				});
+			} else {
+				callback(-1);
+			}
+		});
 	}