topics.isFollowing works with multiple tids now

public/language/en_GB/global.json

@@ -98,6 +98,7 @@
 	"updated.message": "This forum has just been updated to the latest version. Click here to refresh the page.",
 
 	"privacy": "Privacy",
-
+	"follow": "Follow",
+	"unfollow": "Unfollow",
 	"delete_all": "Delete All"
 }

public/src/ajaxify.js

@@ -115,7 +115,7 @@ $(document).ready(function() {
 						ajaxify.variables.parse();
 
 						ajaxify.widgets.render(tpl_url, url, function() {
-							$(window).trigger('action:ajaxify.end', {url: url});
+							$(window).trigger('action:ajaxify.end', {url: url, tpl_url: tpl_url});
 						});
 
 						$(window).trigger('action:ajaxify.contentLoaded', {url: url});

public/src/app.js

@@ -539,7 +539,8 @@ app.uid = null;
 				ajaxify.widgets.render(tpl_url, url, function() {
 					app.processPage();
 					$window.trigger('action:ajaxify.end', {
-						url: url
+						url: url,
+						tpl_url: tpl_url
 					});
 				});
 			});

src/threadTools.js

@@ -239,11 +239,11 @@ var winston = require('winston'),
 				if (!exists) {
 					return next(new Error('[[error:no-topic]]'));
 				}
-				topics.isFollowing(tid, uid, next);
+				topics.isFollowing([tid], uid, next);
 			},
 			function (isFollowing, next) {
-				db[isFollowing ? 'setRemove' : 'setAdd']('tid:' + tid + ':followers', uid, function(err) {
-					next(err, !isFollowing);
+				db[isFollowing[0] ? 'setRemove' : 'setAdd']('tid:' + tid + ':followers', uid, function(err) {
+					next(err, !isFollowing[0]);
 				});
 			}
 		], callback);

src/topics.js

@@ -234,7 +234,7 @@ var async = require('async'),
 				category: async.apply(Topics.getCategoryData, tid),
 				threadTools: async.apply(plugins.fireHook, 'filter:topic.thread_tools', []),
 				tags: async.apply(Topics.getTopicTagsObjects, tid),
-				isFollowing: async.apply(Topics.isFollowing, tid, uid)
+				isFollowing: async.apply(Topics.isFollowing, [tid], uid)
 			}, function(err, results) {
 				if (err) {
 					return callback(err);
@@ -244,7 +244,7 @@ var async = require('async'),
 				topicData.category = results.category;
 				topicData.thread_tools = results.threadTools;
 				topicData.tags = results.tags;
-				topicData.isFollowing = results.isFollowing;
+				topicData.isFollowing = results.isFollowing[0];
 
 				topicData.unreplied = parseInt(topicData.postcount, 10) === 1;
 				topicData.deleted = parseInt(topicData.deleted, 10) === 1;

src/topics/follow.js

@@ -14,11 +14,17 @@ var async = require('async'),
 module.exports = function(Topics) {
 
 
-	Topics.isFollowing = function(tid, uid, callback) {
-		if (!parseInt(uid, 10)) {
-			return callback(null, false);
+	Topics.isFollowing = function(tids, uid, callback) {
+		if (!Array.isArray(tids)) {
+			return callback();
 		}
-		db.isSetMember('tid:' + tid + ':followers', uid, callback);
+		if (!parseInt(uid, 10)) {
+			return callback(null, tids.map(function() { return false; }));
+		}
+		var keys = tids.map(function(tid) {
+			return 'tid:' + tid + ':followers';
+		})
+		db.isMemberOfSets(keys, uid, callback);
 	};
 
 	Topics.getFollowers = function(tid, callback) {