flushed out upgrade path for notifications

src/upgrade.js

@@ -11,20 +11,52 @@ Upgrade.upgrade = function() {
 		function(next) {
 			RDB.hget('notifications:1', 'score', function(err, score) {
 				if (score) {
-					winston.info('[2013/10/03] Updating Notifications');
-					RDB.keys('uid:*:notifications:*', function(err, keys) {
-						async.each(keys, function(key, next) {
-							RDB.zrange(key, 0, -1, function(err, nids) {
-								async.each(nids, function(nid, next) {
-									notifications.get(nid, function(notif_data) {
-										RDB.zadd(key, notif_data.datetime, nid, next);
+					async.series([
+						function(next) {
+							RDB.keys('uid:*:notifications:flag', function(err, keys) {
+								if (keys.length > 0) {
+									winston.info('[2013/10/03] Removing deprecated Notification Flags');
+									async.each(keys, function(key, next) {
+										RDB.del(key, next);
+									}, next);
+								} else {
+									winston.info('[2013/10/03] No Notification Flags found. Good.');
+									next();
+								}
+							});
+						},
+						function(next) {
+							winston.info('[2013/10/03] Updating Notifications');
+							RDB.keys('uid:*:notifications:*', function(err, keys) {
+								async.each(keys, function(key, next) {
+									RDB.zrange(key, 0, -1, function(err, nids) {
+										async.each(nids, function(nid, next) {
+											notifications.get(nid, function(notif_data) {
+												RDB.zadd(key, notif_data.datetime, nid, next);
+											});
+										}, next);
 									});
 								}, next);
 							});
-						}, next);
-					});
+						},
+						function(next) {
+							RDB.keys('notifications:*', function(err, keys) {
+								if (keys.length > 0) {
+									winston.info('[2013/10/03] Removing Notification Scores');
+									async.each(keys, function(key, next) {
+										if (key === 'notifications:next_nid') return next();
+										RDB.hdel(key, 'score', next);
+									}, next);
+								} else {
+									winston.info('[2013/10/03] No Notification Scores found. Good.');
+									next();
+								}
+							});
+						}
+					], next);
 				} else {
 					winston.info('[2013/10/03] Updates to Notifications skipped.');
+					next();
 				}
 			});
 		}