FEATURE: added UI for tracking categories

app/assets/javascripts/discourse/models/user.js

@@ -181,8 +181,9 @@ Discourse.User = Discourse.Model.extend({
                                'external_links_in_new_tab',
                                'watch_new_topics',
                                'enable_quoting');
-    data.watched_category_ids = this.get('watchedCategories').map(function(c){ return c.get('id')});
-    data.muted_category_ids = this.get('mutedCategories').map(function(c){ return c.get('id')});
+    _.each(['muted','watched','tracked'], function(s){
+      data[s + '_category_ids'] = user.get(s + 'Categories').map(function(c){ return c.get('id')});
+    });
 
     return Discourse.ajax("/users/" + this.get('username_lower'), {
       data: data,
@@ -362,6 +363,12 @@ Discourse.User = Discourse.Model.extend({
     }));
   }.observes("muted_category_ids"),
 
+  updateTrackedCategories: function() {
+    this.set("trackedCategories", _.map(this.tracked_category_ids, function(id){
+      return Discourse.Category.findById(id);
+    }));
+  }.observes("tracked_category_ids"),
+
   updateWatchedCategories: function() {
     this.set("watchedCategories", _.map(this.watched_category_ids, function(id){
       return Discourse.Category.findById(id);

app/assets/javascripts/discourse/templates/user/preferences.js.handlebars

@@ -141,6 +141,11 @@
         {{category-group categories=watchedCategories}}
         <div class="instructions">{{i18n user.watched_categories_instructions}}</div>
       </div>
+      <div class="controls">
+        <label>{{i18n user.tracked_categories}}</label>
+        {{category-group categories=trackedCategories}}
+        <div class="instructions">{{i18n user.tracked_categories_instructions}}</div>
+      </div>
       <div class="controls">
         <label>{{i18n user.muted_categories}}</label>
         {{category-group categories=mutedCategories}}

app/serializers/user_serializer.rb

@@ -62,6 +62,7 @@ class UserSerializer < BasicUserSerializer
                      :gravatar_template,
                      :uploaded_avatar_template,
                      :muted_category_ids,
+                     :tracked_category_ids,
                      :watched_category_ids
 
 
@@ -112,6 +113,10 @@ class UserSerializer < BasicUserSerializer
     CategoryUser.lookup(object, :muted).pluck(:category_id)
   end
 
+  def tracked_category_ids
+    CategoryUser.lookup(object, :tracking).pluck(:category_id)
+  end
+
   def watched_category_ids
     CategoryUser.lookup(object, :watching).pluck(:category_id)
   end

app/services/user_updater.rb

@@ -15,6 +15,10 @@ class UserUpdater
       CategoryUser.batch_set(user, :watching, ids)
     end
 
+    if ids = attributes[:tracked_category_ids]
+      CategoryUser.batch_set(user, :tracking, ids)
+    end
+
     if ids = attributes[:muted_category_ids]
       CategoryUser.batch_set(user, :muted, ids)
     end

config/locales/client.en.yml

@@ -230,6 +230,8 @@ en:
       watch_new_topics: "Automatically watch all new topics posted on the forum"
       watched_categories: "Watched"
       watched_categories_instructions: "You will automatically watch all topics in these categories"
+      tracked_categories: "Tracked"
+      tracked_categories_instructions: "You will automatically recieve notifications for topics in these categories"
       muted_categories: "Muted"
       muted_categories_instructions: "You will automatically mute all topics in these categories"