Introduce a new Keys::DestroyService service

app/controllers/profiles/keys_controller.rb

@@ -23,7 +23,7 @@ class Profiles::KeysController < Profiles::ApplicationController
 
   def destroy
     @key = current_user.keys.find(params[:id])
-    @key.destroy
+    Keys::DestroyService.new(current_user).execute(@key)
 
     respond_to do |format|
       format.html { redirect_to profile_keys_url, status: 302 }

app/services/keys/base_service.rb

@@ -2,7 +2,7 @@ module Keys
   class BaseService
     attr_accessor :user, :params
 
-    def initialize(user, params)
+    def initialize(user, params = {})
       @user, @params = user, params
       @ip_address = @params.delete(:ip_address)
     end

app/services/keys/destroy_service.rb

+module Keys
+  class DestroyService < ::Keys::BaseService
+    def execute(key)
+      key.destroy if destroy_possible?(key)
+    end
+
+    # overriden in EE::Keys::DestroyService
+    def destroy_possible?(key)
+      true
+    end
+  end
+end

spec/services/keys/destroy_service_spec.rb

+require 'spec_helper'
+
+describe Keys::DestroyService do
+  let(:user) { create(:user) }
+
+  subject { described_class.new(user) }
+
+  it 'destroys a key' do
+    key = create(:key)
+
+    expect { subject.execute(key) }.to change(Key, :count).by(-1)
+  end
+end