Extract Clusters::BuildService

app/controllers/clusters/clusters_controller.rb

@@ -181,30 +181,15 @@ class Clusters::ClustersController < Clusters::BaseController
   end
 
   def gcp_cluster
-    @gcp_cluster = new_cluster do |cluster|
+    cluster = Clusters::BuildService.new(clusterable.subject).execute
     cluster.build_provider_gcp
-    end
+    @gcp_cluster = cluster.present(current_user: current_user)
   end
 
   def user_cluster
-    @user_cluster = new_cluster do |cluster|
+    cluster = Clusters::BuildService.new(clusterable.subject).execute
     cluster.build_platform_kubernetes
-    end
-  end
-
-  def new_cluster
-    ::Clusters::Cluster.new.tap do |cluster|
-      yield cluster
-
-      case clusterable.subject
-      when ::Project
-        cluster.cluster_type = :project_type
-      when ::Group
-        cluster.cluster_type = :group_type
-      else
-        raise NotImplementedError
-      end
-    end.present(current_user: current_user)
+    @user_cluster = cluster.present(current_user: current_user)
   end
 
   def validate_gcp_token

app/services/clusters/build_service.rb

+# frozen_string_literal: true
+module Clusters
+  class BuildService
+    def initialize(subject)
+      @subject = subject
+    end
+
+    def execute
+      ::Clusters::Cluster.new.tap do |cluster|
+        case @subject
+        when ::Project
+          cluster.cluster_type = :project_type
+        when ::Group
+          cluster.cluster_type = :group_type
+        else
+          raise NotImplementedError
+        end
+      end
+    end
+  end
+end

spec/services/clusters/build_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Clusters::BuildService do
+  describe '#execute' do
+    subject { described_class.new(cluster_subject).execute }
+
+    describe 'when cluster subject is a project' do
+      let(:cluster_subject) { build(:project) }
+
+      it 'sets the cluster_type to project_type' do
+        is_expected.to be_project_type
+      end
+    end
+
+    describe 'when cluster subject is a group' do
+      let(:cluster_subject) { build(:group) }
+
+      it 'sets the cluster_type to group_type' do
+        is_expected.to be_group_type
+      end
+    end
+  end
+end