Rework Labs feature toggling

Refs #4750
- Make "Feature" a Controller with promise support.
- Use via 'needs' instead of injecting from an initializer because
  we need authenticated access to the API.
- Check whether feature is enabled when entering Code Injection route.

core/client/controllers/feature.js

@@ -0,0 +1,37 @@
+var FeatureController = Ember.Controller.extend(Ember.PromiseProxyMixin, {
+    init: function () {
+        var promise;
+
+        promise = this.store.find('setting', {type: 'blog,theme'}).then(function (settings) {
+            return settings.get('firstObject');
+        });
+
+        this.set('promise', promise);
+    },
+
+    setting: Ember.computed.alias('content'),
+
+    labs: Ember.computed('isSettled', 'setting.labs', function () {
+        var value = {};
+
+        if (this.get('isFulfilled')) {
+            try {
+                value = JSON.parse(this.get('setting.labs') || {});
+            } catch (err) {
+                value = {};
+            }
+        }
+
+        return value;
+    }),
+
+    tagsUI: Ember.computed('config.tagsUI', 'labs.tagsUI', function () {
+        return this.get('config.tagsUI') || this.get('labs.tagsUI');
+    }),
+
+    codeInjectionUI: Ember.computed('config.codeInjectionUI', 'labs.codeInjectionUI', function () {
+        return this.get('config.codeInjectionUI') || this.get('labs.codeInjectionUI');
+    })
+});
+
+export default FeatureController;

core/client/controllers/settings.js

@@ -1,15 +1,17 @@
 var SettingsController = Ember.Controller.extend({
+    needs: ['feature'],
+
     showGeneral: Ember.computed('session.user.name', function () {
         return this.get('session.user.isAuthor') || this.get('session.user.isEditor') ? false : true;
     }),
     showUsers: Ember.computed('session.user.name', function () {
         return this.get('session.user.isAuthor') ? false : true;
     }),
-    showTags: Ember.computed('session.user.name', 'feature.tagsUI', function () {
-        return this.get('session.user.isAuthor') || !this.get('feature.tagsUI') ? false : true;
+    showTags: Ember.computed('session.user.name', 'controllers.feature.tagsUI', function () {
+        return this.get('session.user.isAuthor') || !this.get('controllers.feature.tagsUI') ? false : true;
     }),
-    showCodeInjection: Ember.computed('session.user.name', 'feature.codeInjectionUI', function () {
-        return this.get('session.user.isAuthor') || this.get('session.user.isEditor') || !this.get('feature.codeInjectionUI') ? false : true;
+    showCodeInjection: Ember.computed('session.user.name', 'controllers.feature.codeInjectionUI', function () {
+        return this.get('session.user.isAuthor') || this.get('session.user.isEditor') || !this.get('controllers.feature.codeInjectionUI') ? false : true;
     }),
     showLabs: Ember.computed('session.user.name', function () {
         return this.get('session.user.isAuthor')  || this.get('session.user.isEditor') ? false : true;

core/client/controllers/settings/labs.js

@@ -1,4 +1,6 @@
 var LabsController = Ember.Controller.extend(Ember.Evented, {
+    needs: ['feature'],
+
     uploadButtonText: 'Import',
     importErrors: '',
     labsJSON: Ember.computed('model.labs', function () {
@@ -23,24 +25,24 @@ var LabsController = Ember.Controller.extend(Ember.Evented, {
     tagsUIFlag: Ember.computed.alias('config.tagsUI'),
     codeUIFlag: Ember.computed.alias('config.codeInjectionUI'),
 
-    useTagsUI: Ember.computed('tagsUI', function (key, value) {
+    useTagsUI: Ember.computed('controllers.feature.tagsUI', function (key, value) {
         // setter
         if (arguments.length > 1) {
             this.saveLabs('tagsUI', value);
         }
 
         // getter
-        return this.get('feature.tagsUI') || false;
+        return this.get('controllers.feature.tagsUI') || false;
     }),
 
-    useCodeInjectionUI: Ember.computed('codeInjectionUI', function (key, value) {
+    useCodeInjectionUI: Ember.computed('controllers.feature.tagsUI', function (key, value) {
         // setter
         if (arguments.length > 1) {
             this.saveLabs('codeInjectionUI', value);
         }
 
         // getter
-        return this.get('feature.codeInjectionUI') || false;
+        return this.get('controllers.feature.codeInjectionUI') || false;
     }),
 
     actions: {

core/client/initializers/feature.js

@@ -1,17 +0,0 @@
-import Feature from 'ghost/utils/feature';
-
-var injectFeatureInitializer = {
-    name: 'injectFeature',
-    after: ['config', 'store'],
-
-    initialize: function (container, application) {
-        application.register('feature:main', Feature);
-        application.inject('feature:main', 'store', 'store:main');
-        application.inject('feature:main', 'config', 'ghost:config');
-
-        application.inject('controller', 'feature', 'feature:main');
-        application.inject('route', 'feature', 'feature:main');
-    }
-};
-
-export default injectFeatureInitializer;

core/client/routes/settings/code-injection.js

@@ -7,9 +7,24 @@ var SettingsCodeInjectionRoute = AuthenticatedRoute.extend(styleBody, loadingInd
     classNames: ['settings-view-code'],
 
     beforeModel: function () {
+        var feature = this.controllerFor('feature'),
+            self = this;
+
+        if (!feature) {
+            this.generateController('feature');
+            feature = this.controllerFor('feature');
+        }
+
         return this.currentUser()
             .then(this.transitionAuthor())
-            .then(this.transitionEditor());
+            .then(this.transitionEditor())
+            .then(function () {
+                return feature.then(function () {
+                    if (!feature.get('codeInjectionUI')) {
+                        return self.transitionTo('settings.general');
+                    }
+                });
+            });
     },
 
     model: function () {

core/client/routes/settings/tags.js

@@ -12,7 +12,6 @@ paginationSettings = {
 };
 
 TagsRoute = AuthenticatedRoute.extend(CurrentUserSettings, PaginationRouteMixin, {
-
     actions: {
         willTransition: function () {
             this.send('closeSettingsMenu');
@@ -22,12 +21,23 @@ TagsRoute = AuthenticatedRoute.extend(CurrentUserSettings, PaginationRouteMixin,
     titleToken: 'Tags',
 
     beforeModel: function () {
-        if (!this.get('feature.tagsUI')) {
-            return this.transitionTo('settings.general');
+        var feature = this.controllerFor('feature'),
+            self = this;
+
+        if (!feature) {
+            this.generateController('feature');
+            feature = this.controllerFor('feature');
         }
 
         return this.currentUser()
-            .then(this.transitionAuthor());
+            .then(this.transitionAuthor())
+            .then(function () {
+                return feature.then(function () {
+                    if (!feature.get('tagsUI')) {
+                        return self.transitionTo('settings.general');
+                    }
+                });
+            });
     },
 
     model: function () {

core/client/utils/feature.js

@@ -1,24 +0,0 @@
-var Feature;
-
-Feature = Ember.Object.extend({
-    init: function () {
-        var self = this;
-        this.store.find('setting').then(function (settings) {
-            self.set('setting', settings.get('firstObject'));
-        });
-    },
-    labs: Ember.computed('setting', 'setting.labs', function () {
-        if (this.setting) {
-            return JSON.parse(this.get('setting.labs') || {});
-        }
-        return {};
-    }),
-    tagsUI: Ember.computed('config.tagsUI', 'labs.tagsUI', function () {
-        return this.config.tagsUI || this.get('labs.tagsUI');
-    }),
-    codeInjectionUI: Ember.computed('config.codeInjectionUI', 'labs.codeInjectionUI', function () {
-        return this.config.codeInjectionUI || this.get('labs.codeInjectionUI');
-    })
-});
-
-export default Feature;