Move body of /post_receive handler into service

This commit just moves body of API endpoint handler
into a service. Breaking down the service into methods and
refactoring is going to be performed in another commits

Tests aren't touched in order to prove that it works as before

app/services/post_receive_service.rb

+# frozen_string_literal: true
+
+# PostReceiveService class
+#
+# Used for scheduling related jobs after a push action has been performed
+class PostReceiveService
+  attr_reader :user, :project, :params
+
+  def initialize(user, project, params)
+    @user = user
+    @project = project
+    @params = params
+  end
+
+  def execute
+    response = Gitlab::InternalPostReceive::Response.new
+
+    push_options = Gitlab::PushOptions.new(params[:push_options])
+
+    response.reference_counter_decreased = Gitlab::ReferenceCounter.new(params[:gl_repository]).decrease
+
+    PostReceive.perform_async(params[:gl_repository], params[:identifier],
+                              params[:changes], push_options.as_json)
+
+    mr_options = push_options.get(:merge_request)
+    if mr_options.present?
+      message = process_mr_push_options(mr_options, project, user, params[:changes])
+      response.add_alert_message(message)
+    end
+
+    broadcast_message = BroadcastMessage.current&.last&.message
+    response.add_alert_message(broadcast_message)
+
+    response.add_merge_request_urls(merge_request_urls)
+
+    # Neither User nor Project are guaranteed to be returned; an orphaned write deploy
+    # key could be used
+    if user && project
+      redirect_message = Gitlab::Checks::ProjectMoved.fetch_message(user.id, project.id)
+      project_created_message = Gitlab::Checks::ProjectCreated.fetch_message(user.id, project.id)
+
+      response.add_basic_message(redirect_message)
+      response.add_basic_message(project_created_message)
+    end
+
+    response
+  end
+
+  def process_mr_push_options(push_options, project, user, changes)
+    Gitlab::QueryLimiting.whitelist('https://gitlab.com/gitlab-org/gitlab-foss/issues/61359')
+
+    service = ::MergeRequests::PushOptionsHandlerService.new(
+      project, user, changes, push_options
+    ).execute
+
+    if service.errors.present?
+      push_options_warning(service.errors.join("\n\n"))
+    end
+  end
+
+  def push_options_warning(warning)
+    options = Array.wrap(params[:push_options]).map { |p| "'#{p}'" }.join(' ')
+    "WARNINGS:\nError encountered with push options #{options}: #{warning}"
+  end
+
+  def merge_request_urls
+    ::MergeRequests::GetUrlsService.new(project).execute(params[:changes])
+  end
+end

lib/api/helpers/internal_helpers.rb

@@ -55,30 +55,6 @@ module API
         ::Users::ActivityService.new(actor).execute if commands.include?(params[:action])
       end
 
-      def merge_request_urls
-        ::MergeRequests::GetUrlsService.new(project).execute(params[:changes])
-      end
-
-      def process_mr_push_options(push_options, project, user, changes)
-        Gitlab::QueryLimiting.whitelist('https://gitlab.com/gitlab-org/gitlab-foss/issues/61359')
-
-        service = ::MergeRequests::PushOptionsHandlerService.new(
-          project,
-          user,
-          changes,
-          push_options
-        ).execute
-
-        if service.errors.present?
-          push_options_warning(service.errors.join("\n\n"))
-        end
-      end
-
-      def push_options_warning(warning)
-        options = Array.wrap(params[:push_options]).map { |p| "'#{p}'" }.join(' ')
-        "WARNINGS:\nError encountered with push options #{options}: #{warning}"
-      end
-
       def redis_ping
         result = Gitlab::Redis::SharedState.with { |redis| redis.ping }
 

lib/api/internal/base.rb

@@ -212,40 +212,7 @@ module API
         post '/post_receive' do
           status 200
 
-          response = Gitlab::InternalPostReceive::Response.new
-
-          # Try to load the project and users so we have the application context
-          # available for logging before we schedule any jobs.
-          user = actor.user
-          project
-
-          push_options = Gitlab::PushOptions.new(params[:push_options])
-
-          response.reference_counter_decreased = Gitlab::ReferenceCounter.new(params[:gl_repository]).decrease
-
-          PostReceive.perform_async(params[:gl_repository], params[:identifier],
-                                    params[:changes], push_options.as_json)
-
-          mr_options = push_options.get(:merge_request)
-          if mr_options.present?
-            message = process_mr_push_options(mr_options, project, user, params[:changes])
-            response.add_alert_message(message)
-          end
-
-          broadcast_message = BroadcastMessage.current&.last&.message
-          response.add_alert_message(broadcast_message)
-
-          response.add_merge_request_urls(merge_request_urls)
-
-          # Neither User nor Project are guaranteed to be returned; an orphaned write deploy
-          # key could be used
-          if user && project
-            redirect_message = Gitlab::Checks::ProjectMoved.fetch_message(user.id, project.id)
-            project_created_message = Gitlab::Checks::ProjectCreated.fetch_message(user.id, project.id)
-
-            response.add_basic_message(redirect_message)
-            response.add_basic_message(project_created_message)
-          end
+          response = PostReceiveService.new(actor.user, project, params).execute
 
           ee_post_receive_response_hook(response)