Refactor topic title/category saving to support easier changing of

attributes via plugins.

app/assets/javascripts/discourse/controllers/topic.js.es6

@@ -1,7 +1,8 @@
 import ObjectController from 'discourse/controllers/object';
+import BufferedContent from 'discourse/mixins/buffered-content';
 import { spinnerHTML } from 'discourse/helpers/loading-spinner';
 
-export default ObjectController.extend(Discourse.SelectedPostsCount, {
+export default ObjectController.extend(Discourse.SelectedPostsCount, BufferedContent, {
   multiSelect: false,
   needs: ['header', 'modal', 'composer', 'quote-button', 'search', 'topic-progress', 'application'],
   allPostsSelected: false,
@@ -235,11 +236,6 @@ export default ObjectController.extend(Discourse.SelectedPostsCount, {
       this.set('allPostsSelected', false);
     },
 
-    /**
-      Toggle a participant for filtering
-
-      @method toggleParticipant
-    **/
     toggleParticipant: function(user) {
       this.get('postStream').toggleParticipant(Em.get(user, 'username'));
     },
@@ -247,17 +243,13 @@ export default ObjectController.extend(Discourse.SelectedPostsCount, {
     editTopic: function() {
       if (!this.get('details.can_edit')) return false;
 
-      this.setProperties({
-        editingTopic: true,
-        newTitle: this.get('title'),
-        newCategoryId: this.get('category_id')
-      });
+      this.set('editingTopic', true);
       return false;
     },
 
-    // close editing mode
     cancelEditingTopic: function() {
       this.set('editingTopic', false);
+      this.rollbackBuffer();
     },
 
     toggleMultiSelect: function() {
@@ -265,39 +257,25 @@ export default ObjectController.extend(Discourse.SelectedPostsCount, {
     },
 
     finishedEditingTopic: function() {
-      if (this.get('editingTopic')) {
+      if (!this.get('editingTopic')) { return; }
 
-        var topic = this.get('model');
+      // save the modifications
+      var self = this,
+          props = this.get('buffered.buffer');
 
-        // Topic title hasn't been sanitized yet, so the template shouldn't trust it.
-        this.set('topicSaving', true);
-
-        // manually update the titles & category
-        var backup = topic.setPropertiesBackup({
-          title: this.get('newTitle'),
-          category_id: parseInt(this.get('newCategoryId'), 10),
-          fancy_title: this.get('newTitle')
-        });
-
-        // save the modifications
-        var self = this;
-        topic.save().then(function(result){
-          // update the title if it has been changed (cleaned up) server-side
-          topic.setProperties(Em.getProperties(result.basic_topic, 'title', 'fancy_title'));
-          self.set('topicSaving', false);
-        }, function(error) {
-          self.setProperties({ editingTopic: true, topicSaving: false });
-          topic.setProperties(backup);
-          if (error && error.responseText) {
-            bootbox.alert($.parseJSON(error.responseText).errors[0]);
-          } else {
-            bootbox.alert(I18n.t('generic_error'));
-          }
-        });
-
-        // close editing mode
+      Discourse.Topic.update(this.get('model'), props).then(function() {
         self.set('editingTopic', false);
-      }
+      }).catch(function(error) {
+        if (error && error.responseText) {
+          bootbox.alert($.parseJSON(error.responseText).errors[0]);
+        } else {
+          bootbox.alert(I18n.t('generic_error'));
+        }
+      }).finally(function() {
+        // Note we even roll back on success here because `update` saves
+        // the properties to the topic.
+        self.rollbackBuffer();
+      });
     },
 
     toggledSelectedPost: function(post) {

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

@@ -463,13 +463,10 @@ Discourse.Composer = Discourse.Model.extend({
 
     // Update the title if we've changed it
     if (this.get('title') && post.get('post_number') === 1) {
-      var topic = this.get('topic');
-      topic.setProperties({
+      Discourse.Topic.update(this.get('topic'), {
         title: this.get('title'),
-        fancy_title: Handlebars.Utils.escapeExpression(this.get('title')),
-        category_id: parseInt(this.get('categoryId'), 10)
+        category_id: this.get('categoryId')
       });
-      topic.save();
     }
 
     post.setProperties({

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

@@ -1,12 +1,4 @@
-Discourse.Model = Ember.Object.extend(Discourse.Presence, {
-  // Like `setProperties` but returns the original values in case
-  // we want to roll back
-  setPropertiesBackup: function(obj) {
-    var backup = this.getProperties(Ember.keys(obj));
-    this.setProperties(obj);
-    return backup;
-  }
-});
+Discourse.Model = Ember.Object.extend(Discourse.Presence);
 
 Discourse.Model.reopenClass({
   extractByKey: function(collection, klass) {

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

@@ -202,23 +202,6 @@ Discourse.Topic = Discourse.Model.extend({
     });
   },
 
-  // Save any changes we've made to the model
-  save: function() {
-    // Don't save unless we can
-    if (!this.get('details.can_edit')) return;
-
-    var data = { title: this.get('title') };
-
-    if(this.get('category')){
-      data.category_id = this.get('category.id');
-    }
-
-    return Discourse.ajax(this.get('url'), {
-      type: 'PUT',
-      data: data
-    });
-  },
-
   /**
     Invite a user to this topic
 
@@ -373,6 +356,17 @@ Discourse.Topic.reopenClass({
     }
   },
 
+  update: function(topic, props) {
+    return Discourse.ajax(topic.get('url'), { type: 'PUT', data: props }).then(function(result) {
+
+      // The title can be cleaned up server side
+      props.title = result.basic_topic.title;
+      props.fancy_title = result.basic_topic.fancy_title;
+
+      topic.setProperties(props);
+    });
+  },
+
   create: function() {
     var result = this._super.apply(this, arguments);
     this.createActionSummary(result);

app/assets/javascripts/discourse/templates/topic.hbs

@@ -16,11 +16,11 @@
           {{#if editingTopic}}
             {{#if isPrivateMessage}}
               <span class="private-message-glyph">{{fa-icon envelope}}</span>
-              {{autofocus-text-field id='edit-title' value=newTitle maxLength=maxTitleLength}}
+              {{autofocus-text-field id='edit-title' value=buffered.title maxLength=maxTitleLength}}
             {{else}}
-              {{autofocus-text-field id='edit-title' value=newTitle maxLength=maxTitleLength}}
+              {{autofocus-text-field id='edit-title' value=buffered.title maxLength=maxTitleLength}}
               </br>
-              {{category-chooser valueAttribute="id" value=newCategoryId source=category_id}}
+              {{category-chooser valueAttribute="id" value=buffered.category_id source=buffered.category_id}}
             {{/if}}
 
             <button class='btn btn-primary btn-small no-text' {{action "finishedEditingTopic"}}>{{fa-icon check}}</button>
@@ -34,11 +34,7 @@
               {{#if details.loaded}}
                 {{topic-status topic=model}}
                 <a href='{{unbound url}}' {{action "jumpTop"}}>
-                  {{#if topicSaving}}
-                    {{fancy_title}}
-                  {{else}}
-                    {{{fancy_title}}}
-                  {{/if}}
+                  {{{fancy_title}}}
                 </a>
               {{/if}}
 

app/assets/javascripts/discourse/views/category-chooser.js.es6

@@ -7,6 +7,7 @@ export default ComboboxView.extend({
   overrideWidths: true,
   dataAttributes: ['id', 'description_text'],
   valueBinding: Ember.Binding.oneWay('source'),
+  castInteger: true,
 
   content: function() {
     var scopedCategoryId = this.get('scopedCategoryId');

app/assets/javascripts/discourse/views/combo-box.js.es6

@@ -63,7 +63,7 @@ export default Discourse.View.extend({
     this.rerender();
   }.observes('content.@each'),
 
-  didInsertElement: function() {
+  _initializeCombo: function() {
     var $elem = this.$(),
         self = this;
 
@@ -75,10 +75,15 @@ export default Discourse.View.extend({
 
     $elem.select2({formatResult: this.template, minimumResultsForSearch: 5, width: 'resolve'});
 
+    var castInteger = this.get('castInteger');
     $elem.on("change", function (e) {
-      self.set('value', $(e.target).val());
+      var val = $(e.target).val();
+      if (val.length && castInteger) {
+        val = parseInt(val, 10);
+      }
+      self.set('value', val);
     });
-  },
+  }.on('didInsertElement'),
 
   willClearRender: function() {
     var elementId = "s2id_" + this.$().attr('id');

test/javascripts/controllers/topic-test.js.es6

@@ -28,8 +28,8 @@ test("editingMode", function() {
   topicController.set('model.details.can_edit', true);
   topicController.send('editTopic');
   ok(topicController.get('editingTopic'), "calling editTopic enables editing if the user can edit");
-  equal(topicController.get('newTitle'), topic.get('title'));
-  equal(topicController.get('newCategoryId'), topic.get('category_id'));
+  equal(topicController.get('buffered.title'), topic.get('title'));
+  equal(topicController.get('buffered.category_id'), topic.get('category_id'));
 
   topicController.send('cancelEditingTopic');
   ok(!topicController.get('editingTopic'), "cancelling edit mode reverts the property value");