Clean up settings/preferences controller (#2237)

* Add missing fields group on preferences page

* Clean up settings/preferences controller

* Extract a UserSettingsDecorator

spec/controllers/settings/preferences_controller_spec.rb

@@ -1,16 +1,45 @@
 require 'rails_helper'
 
-RSpec.describe Settings::PreferencesController, type: :controller do
-
+describe Settings::PreferencesController do
+  let(:user) { Fabricate(:user) }
   before do
-    sign_in Fabricate(:user), scope: :user
+    sign_in user, scope: :user
   end
 
-  describe "GET #show" do
-    it "returns http success" do
+  describe 'GET #show' do
+    it 'returns http success' do
       get :show
+
       expect(response).to have_http_status(:success)
     end
   end
 
+  describe 'PUT #update' do
+    it 'udpates the user record' do
+      put :update, params: { user: { locale: 'en' } }
+
+      expect(response).to redirect_to(settings_preferences_path)
+      expect(user.reload.locale).to eq 'en'
+    end
+
+    it 'updates user settings' do
+      user.settings['boost_modal'] = false
+      user.settings['notification_emails']['follow'] = false
+      user.settings['interactions']['must_be_follower'] = true
+
+      put :update, params: {
+        user: {
+          setting_boost_modal: '1',
+          notification_emails: { follow: '1' },
+          interactions: { must_be_follower: '0' }
+        }
+      }
+
+      expect(response).to redirect_to(settings_preferences_path)
+      user.reload
+      expect(user.settings['boost_modal']).to be true
+      expect(user.settings['notification_emails']['follow']).to be true
+      expect(user.settings['interactions']['must_be_follower']).to be false
+    end
+  end
 end