notifications.create can return null

src/groups/membership.js

@@ -74,26 +74,30 @@ module.exports = function(Groups) {
 	Groups.requestMembership = function(groupName, uid, callback) {
 		async.waterfall([
 			async.apply(inviteOrRequestMembership, groupName, uid, 'request'),
-			function(next) {
-				user.getUserField(uid, 'username', function(err, username) {
-					if (err) {
-						return next(err);
-					}
-					next(null, {
+			function (next) {
+				user.getUserField(uid, 'username', next);
+			},
+			function (username, next) {
+				async.parallel({
+					notification: function(next) {
+						notifications.create({
 							bodyShort: '[[groups:request.notification_title, ' + username + ']]',
 							bodyLong: '[[groups:request.notification_text, ' + username + ', ' + groupName + ']]',
 							nid: 'group:' + groupName + ':uid:' + uid + ':request',
 							path: '/groups/' + utils.slugify(groupName)
-					});
-				});
+						}, next);
 					},
-			async.apply(notifications.create),
-			function(notification, next) {
-				Groups.getOwners(groupName, function(err, ownerUids) {
-					next(null, notification, ownerUids);
-				});
+					owners: function(next) {
+						Groups.getOwners(groupName, next);
+					}
+				}, next);
 			},
-			async.apply(notifications.push)
+			function (results, next) {
+				if (!results.notification || !results.owners.length) {
+					return next();
+				}
+				notifications.push(results.notification, results.owners, next);
+			}
 		], callback);
 	};
 
@@ -123,10 +127,13 @@ module.exports = function(Groups) {
 				nid: 'group:' + groupName + ':uid:' + uid + ':invite',
 				path: '/groups/' + utils.slugify(groupName)
 			}),
-			function(notification, next) {
-				next(null, notification, [uid]);
-			},
-			async.apply(notifications.push)
+			function (notification, next) {
+				if (!notification) {
+					return next();
+				}
+
+				notifications.push(notification, [uid]);
+			}
 		], callback);
 	};
 

src/notifications.js

@@ -90,7 +90,7 @@ var async = require('async'),
 
 			if (oldNotification) {
 				if (parseInt(oldNotification.pid, 10) === parseInt(data.pid, 10) && parseInt(oldNotification.importance, 10) > parseInt(data.importance, 10)) {
-					return callback();
+					return callback(null, null);
 				}
 			}
 

src/socket.io/user.js

@@ -137,13 +137,13 @@ SocketUser.follow = function(socket, data, callback) {
 	}
 	var userData;
 	async.waterfall([
-		function(next) {
+		function (next) {
 			toggleFollow('follow', socket.uid, data.uid, next);
 		},
-		function(next) {
+		function (next) {
 			user.getUserFields(socket.uid, ['username', 'userslug'], next);
 		},
-		function(_userData, next) {
+		function (_userData, next) {
 			userData = _userData;
 			notifications.create({
 				bodyShort: '[[notifications:user_started_following_you, ' + userData.username + ']]',
@@ -153,7 +153,10 @@ SocketUser.follow = function(socket, data, callback) {
 				mergeId: 'notifications:user_started_following_you'
 			}, next);
 		},
-		function(notification, next) {
+		function (notification, next) {
+			if (!notification) {
+				return next();
+			}
 			notification.user = userData;
 			notifications.push(notification, [data.uid], next);
 		}

src/topics/follow.js

@@ -139,18 +139,12 @@ module.exports = function(Topics) {
 					from: exceptUid,
 					mergeId: 'notifications:user_posted_to|' + postData.topic.tid,
 					topicTitle: title
-				}, function(err, notification) {
-					if (err) {
-						return next(err);
-					}
-
+				}, next);
+			},
+			function (notification, next) {
 				if (notification) {
 					notifications.push(notification, followers);
 				}
-					next();
-				});
-			},
-			function (next) {
 
 				if (parseInt(meta.config.disableEmailSubscriptions, 10) === 1) {
 					return next();

src/user/approval.js

@@ -50,14 +50,11 @@ module.exports = function(User) {
 			nid: 'new_register:' + username,
 			path: '/admin/manage/registration'
 		}, function(err, notification) {
-			if (err) {
+			if (err || !notification) {
 				return callback(err);
 			}
-			if (notification) {
+
 			notifications.pushGroup(notification, 'administrators', callback);
-			} else {
-				callback();
-			}
 		});
 	}
 

src/user/notifications.js

@@ -295,14 +295,11 @@ var async = require('async'),
 			path: path,
 			nid: 'welcome_' + uid
 		}, function(err, notification) {
-			if (err) {
+			if (err || !notification) {
 				return callback(err);
 			}
-			if (notification) {
+
 			notifications.push(notification, [uid], callback);
-			} else {
-				callback();
-			}
 		});
 	};