API to set application settings for admin

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/api/api.rb

@@ -49,5 +49,6 @@ module API
     mount Namespaces
     mount Branches
     mount Labels
+    mount Settings
   end
 end

lib/api/entities.rb

@@ -277,5 +277,27 @@ module API
     class BroadcastMessage < Grape::Entity
       expose :message, :starts_at, :ends_at, :color, :font
     end
+
+    class ApplicationSetting < Grape::Entity
+      expose :id
+      expose :default_projects_limit
+      expose :signup_enabled
+      expose :signin_enabled
+      expose :gravatar_enabled
+      expose :sign_in_text
+      expose :created_at
+      expose :updated_at
+      expose :home_page_url
+      expose :default_branch_protection
+      expose :twitter_sharing_enabled
+      expose :restricted_visibility_levels
+      expose :max_attachment_size
+      expose :session_expire_delay
+      expose :default_project_visibility
+      expose :default_snippet_visibility
+      expose :restricted_signup_domains
+      expose :user_oauth_applications
+      expose :after_sign_out_path
+    end
   end
 end

lib/api/settings.rb

+module API
+  class Settings < Grape::API
+    before { authenticate! }
+    before { authorize_admin_project }
+
+    helpers do
+      def current_settings
+        @current_setting ||= ApplicationSetting.current
+      end
+    end
+
+    # Get current applicaiton settings
+    #
+    # Example Request:
+    #   GET /application/settings
+    get "application/settings" do
+      present current_settings, with: Entities::ApplicationSetting
+    end
+
+    # Modify applicaiton settings
+    #
+    # Example Request:
+    #   PUT /application/settings
+    put "application/settings" do
+      attributes = current_settings.attributes.keys - ["id"]
+      attrs = attributes_for_keys(attributes)
+
+      if current_settings.update_attributes(attrs)
+        present current_settings, with: Entities::ApplicationSetting
+      else
+        render_validation_error!(current_settings)
+      end
+    end
+  end
+end