send flag notifications to global mods as well

push notifications to unique uids only

src/notifications.js

@@ -120,8 +120,8 @@ var async = require('async'),
 			uids = [uids];
 		}
 
-		uids = uids.filter(function(uid) {
+		uids = uids.filter(function(uid, index, array) {
-			return parseInt(uid, 10);
+			return parseInt(uid, 10) && array.indexOf(uid) === index;
 		});
 
 		if (!uids.length) {

src/socket.io/posts/flag.js

@@ -73,6 +73,9 @@ module.exports = function(SocketPosts) {
 					admins: function(next) {
 						groups.getMembers('administrators', 0, -1, next);
 					},
+					globalMods: function (next) {
+						groups.getMembers('Global Moderators', 0, -1, next);
+					},
 					moderators: function(next) {
 						groups.getMembers('cid:' + post.topic.cid + ':privileges:mods', 0, -1, next);
 					}
@@ -93,7 +96,7 @@ module.exports = function(SocketPosts) {
 					}
 
 					plugins.fireHook('action:post.flag', {post: post, flaggingUser: flaggingUser});
-					notifications.push(notification, results.admins.concat(results.moderators), next);
+					notifications.push(notification, results.admins.concat(results.moderators).concat(results.globalMods), next);
 				});
 			}
 		], callback);