add applications controller logic

app/controllers/admin/applications_controller.rb

@@ -19,10 +19,12 @@ class Admin::ApplicationsController < Admin::ApplicationController
   end
 
   def create
-    @application = Doorkeeper::Application.new(application_params)
+    @application = Applications::CreateService.new(current_user, application_params.merge(ip_address: request.remote_ip)).execute
 
-    if @application.save
-      redirect_to_admin_page
+    if @application.persisted?
+      flash[:notice] = I18n.t(:notice, scope: [:doorkeeper, :flash, :applications, :create])
+
+      redirect_to admin_application_url(@application)
     else
       render :new
     end
@@ -41,13 +43,6 @@ class Admin::ApplicationsController < Admin::ApplicationController
     redirect_to admin_applications_url, status: 302, notice: 'Application was successfully destroyed.'
   end
 
-  protected
-
-  def redirect_to_admin_page
-    flash[:notice] = I18n.t(:notice, scope: [:doorkeeper, :flash, :applications, :create])
-    redirect_to admin_application_url(@application)
-  end
-
   private
 
   def set_application

app/controllers/oauth/applications_controller.rb

@@ -16,25 +16,16 @@ class Oauth::ApplicationsController < Doorkeeper::ApplicationsController
   end
 
   def create
-    @application = Doorkeeper::Application.new(application_params)
+    @application = Applications::CreateService.new(current_user, create_application_params).execute
 
-    @application.owner = current_user
-
-    if @application.save
-      redirect_to_oauth_application_page
+    if @application.persisted?
+      flash[:notice] = I18n.t(:notice, scope: [:doorkeeper, :flash, :applications, :create])
     else
       set_index_vars
       render :index
     end
   end
 
-  protected
-
-  def redirect_to_oauth_application_page
-    flash[:notice] = I18n.t(:notice, scope: [:doorkeeper, :flash, :applications, :create])
-    redirect_to oauth_application_url(@application)
-  end
-
   private
 
   def verify_user_oauth_applications_enabled
@@ -61,4 +52,11 @@ class Oauth::ApplicationsController < Doorkeeper::ApplicationsController
   rescue_from ActiveRecord::RecordNotFound do |exception|
     render "errors/not_found", layout: "errors", status: 404
   end
+
+  def create_application_params
+    application_params.tap do |params|
+      params[:owner] = current_user
+      params[:ip_address] = request.remote_ip
+    end
+  end
 end

app/services/applications/create_searvice.rb

+module Applications
+  class CreateService
+    prepend ::EE::Applications::CreateService
+
+    def initialize(current_user, params)
+      @current_user = current_user
+      @params = params
+      @ip_address = @params.delete(:ip_address)
+    end
+
+    def execute
+      Doorkeeper::Application.create(@params)
+    end
+  end
+end

spec/services/applications/create_service_spec.rb

+require 'spec_helper'
+
+describe ::Applications::CreateService do
+  let(:user) { create(:user) }
+  let(:params) { attributes_for(:application) }
+
+  subject { described_class.new(user, params) }
+
+  it 'creates an application' do
+    expect { subject.execute }.to change { Doorkeeper::Application.count }.by(1)
+  end
+end