Remove SystemHook observer

app/observers/base_observer.rb

@@ -10,4 +10,8 @@ class BaseObserver < ActiveRecord::Observer
   def log_info message
     Gitlab::AppLogger.info message
   end
+
+  def system_hook_service
+    SystemHooksService.new
+  end
 end

app/observers/system_hook_observer.rb

-class SystemHookObserver < BaseObserver
-  observe :user, :project, :users_project
-
-  def after_create(model)
-    system_hook_service.execute_hooks_for(model, :create)
-  end
-
-  def after_destroy(model)
-    system_hook_service.execute_hooks_for(model, :destroy)
-  end
-
-  private
-
-  def system_hook_service
-    SystemHooksService.new
-  end
-end

app/observers/user_observer.rb

 class UserObserver < BaseObserver
   def after_create(user)
     log_info("User \"#{user.name}\" (#{user.email}) was created")
-
     notification.new_user(user)
+    system_hook_service.execute_hooks_for(user, :create)
   end
 
   def after_destroy user
     log_info("User \"#{user.name}\" (#{user.email})  was removed")
+    system_hook_service.execute_hooks_for(user, :destroy)
   end
 
   def after_save user

app/observers/users_project_observer.rb

@@ -7,6 +7,7 @@ class UsersProjectObserver < BaseObserver
     )
 
     notification.new_team_member(users_project)
+    system_hook_service.execute_hooks_for(users_project, :create)
   end
 
   def after_update(users_project)
@@ -19,5 +20,6 @@ class UsersProjectObserver < BaseObserver
       action: Event::LEFT,
       author_id: users_project.user.id
     )
+    system_hook_service.execute_hooks_for(users_project, :destroy)
   end
 end

app/services/base_service.rb

@@ -28,4 +28,8 @@ class BaseService
   def log_info message
     Gitlab::AppLogger.info message
   end
+
+  def system_hook_service
+    SystemHooksService.new
+  end
 end

app/services/projects/create_service.rb

@@ -52,6 +52,7 @@ module Projects
 
       if @project.save
         log_info("#{@project.owner.name} created a new project \"#{@project.name_with_namespace}\"")
+        system_hook_service.execute_hooks_for(@project, :create)
 
         unless @project.group
           @project.users_projects.create(

app/services/projects/destroy_service.rb

@@ -19,6 +19,8 @@ module Projects
         project.satellite.destroy
 
         log_info("Project \"#{project.name}\" was removed")
+        system_hook_service.execute_hooks_for(project, :destroy)
+        true
       end
     end
   end

config/application.rb

@@ -19,8 +19,7 @@ module Gitlab
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
     # Activate observers that should always be running.
-    config.active_record.observers = :system_hook_observer,
-                                     :user_observer,
+    config.active_record.observers = :user_observer,
                                      :users_project_observer
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.