Allow using inherited description templates on service desk

Allow to save and apply inherited issue description templates
on service desk.

Changelog: added
EE: true

app/controllers/projects/service_desk_controller.rb

@@ -24,24 +24,31 @@ class Projects::ServiceDeskController < Projects::ApplicationController
   private
 
   def setting_params
-    params.permit(:issue_template_key, :outgoing_name, :project_key)
+    params.permit(*allowed_update_attributes)
+  end
+
+  def allowed_update_attributes
+    %i(issue_template_key outgoing_name project_key)
+  end
+
+  def service_desk_attributes
+    service_desk_settings = project.service_desk_setting
+
+    {
+      service_desk_address: project.service_desk_address,
+      service_desk_enabled: project.service_desk_enabled,
+      issue_template_key: service_desk_settings&.issue_template_key,
+      template_file_missing: service_desk_settings&.issue_template_missing?,
+      outgoing_name: service_desk_settings&.outgoing_name,
+      project_key: service_desk_settings&.project_key
+    }
   end
 
   def json_response
     respond_to do |format|
-      service_desk_settings = project.service_desk_setting
-
-      service_desk_attributes =
-        {
-          service_desk_address: project.service_desk_address,
-          service_desk_enabled: project.service_desk_enabled,
-          issue_template_key: service_desk_settings&.issue_template_key,
-          template_file_missing: service_desk_settings&.issue_template_missing?,
-          outgoing_name: service_desk_settings&.outgoing_name,
-          project_key: service_desk_settings&.project_key
-        }
-
       format.json { render json: service_desk_attributes }
     end
   end
 end
+
+Projects::ServiceDeskController.prepend_mod

app/models/service_desk_setting.rb

@@ -19,7 +19,11 @@ class ServiceDeskSetting < ApplicationRecord
     strong_memoize(:issue_template_content) do
       next unless issue_template_key.present?
 
-      Gitlab::Template::IssueTemplate.find(issue_template_key, project).content
+      TemplateFinder.new(
+        :issues, project,
+        name: issue_template_key,
+        source_template_project: source_template_project
+      ).execute.content
     rescue ::Gitlab::Template::Finders::RepoTemplateFinder::FileNotFoundError
     end
   end
@@ -42,6 +46,10 @@ class ServiceDeskSetting < ApplicationRecord
 
   private
 
+  def source_template_project
+    nil
+  end
+
   def projects_with_same_slug_and_key_exists?
     return false unless project_key
 
@@ -53,3 +61,5 @@ class ServiceDeskSetting < ApplicationRecord
     end
   end
 end
+
+ServiceDeskSetting.prepend_mod

ee/app/controllers/ee/projects/service_desk_controller.rb

+# frozen_string_literal: true
+
+module EE
+  module Projects
+    module ServiceDeskController
+      extend ::Gitlab::Utils::Override
+
+      protected
+
+      override :allowed_update_attributes
+      def allowed_update_attributes
+        super + %i(file_template_project_id)
+      end
+
+      override :service_desk_attributes
+      def service_desk_attributes
+        service_desk_settings = project.service_desk_setting
+
+        super.merge(file_template_project_id: service_desk_settings&.file_template_project_id)
+      end
+    end
+  end
+end

ee/app/models/ee/service_desk_setting.rb

+# frozen_string_literal: true
+
+module EE
+  module ServiceDeskSetting
+    extend ActiveSupport::Concern
+    extend ::Gitlab::Utils::Override
+
+    prepended do
+      belongs_to :file_template_project, class_name: "Project", foreign_key: 'file_template_project_id'
+    end
+
+    override :source_template_project
+    def source_template_project
+      file_template_project
+    end
+  end
+end

ee/spec/lib/ee/gitlab/email/handler/service_desk_handler_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
+  include_context :email_shared_context
+
+  before do
+    stub_incoming_email_setting(enabled: true, address: "incoming+%{key}@appmail.adventuretime.ooo")
+    stub_config_setting(host: 'localhost')
+  end
+
+  let(:email_raw) { email_fixture('emails/service_desk.eml') }
+  let_it_be_with_refind(:group) { create(:group, :private, name: "email") }
+
+  let(:expected_description) do
+    "Service desk stuff!\n\n```\na = b\n```\n\n`/label ~label1`\n`/assign @user1`\n`/close`"
+  end
+
+  context 'service desk is enabled for the project' do
+    let_it_be(:project) { create(:project, :repository, :private, group: group, path: 'test', service_desk_enabled: true) }
+
+    before do
+      allow(Gitlab::ServiceDesk).to receive(:supported?).and_return(true)
+    end
+
+    context 'when everything is fine' do
+      context 'when using inherited issue templates' do
+        let_it_be_with_reload(:settings) { create(:service_desk_setting, project: project) }
+        let_it_be(:project_with_instance_template) { create(:project, :custom_repo, files: { '.gitlab/issue_templates/inherited_instance_template.md' => 'instance template' }) }
+
+        context 'from instance' do
+          before do
+            stub_licensed_features(custom_file_templates: true)
+            stub_ee_application_setting(file_template_project: project_with_instance_template)
+          end
+
+          it 'appends instance issue description template' do
+            settings.update!(issue_template_key: 'inherited_instance_template')
+
+            receiver.execute
+
+            issue_description = Issue.last.description
+            expect(issue_description).to include(expected_description)
+            expect(issue_description.lines.last).to eq('instance template')
+          end
+        end
+
+        context 'from groups' do
+          let_it_be(:project_with_group_template) { create(:project, :custom_repo, files: { '.gitlab/issue_templates/inherited_group_template.md' => 'group template' }) }
+
+          before do
+            stub_licensed_features(custom_file_templates_for_namespace: true)
+          end
+
+          it 'appends group issue description template' do
+            create(:project_group_link, project: project_with_group_template, group: group)
+            group.update!(file_template_project_id: project_with_group_template.id)
+            settings.update!(issue_template_key: 'inherited_group_template')
+
+            receiver.execute
+
+            issue_description = Issue.last.description
+            expect(issue_description).to include(expected_description)
+            expect(issue_description.lines.last).to eq('group template')
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/models/ee/service_desk_setting_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ServiceDeskSetting do
+  let_it_be_with_refind(:group) { create(:group) }
+  let_it_be(:project) { create(:project, group: group) }
+  let_it_be(:project_with_group_template) { create(:project, :custom_repo, files: { '.gitlab/issue_templates/inherited_group_template.md' => 'group template' }) }
+  let_it_be(:project_with_instance_template) { create(:project, :custom_repo, files: { '.gitlab/issue_templates/inherited_instance_template.md' => 'instance template' }) }
+
+  before_all do
+    create(:project_group_link, project: project_with_group_template, group: group)
+  end
+
+  subject { build(:service_desk_setting) }
+
+  describe '.issue_template_content' do
+    context 'when file_template_project_id is present' do
+      context 'for group templates' do
+        before do
+          stub_licensed_features(custom_file_templates_for_namespace: true)
+          group.update!(file_template_project_id: project_with_group_template.id)
+        end
+
+        it 'returns template content' do
+          settings =
+            build(:service_desk_setting,
+              project: project,
+              file_template_project_id:
+              project_with_group_template.id,
+              issue_template_key: 'inherited_group_template'
+            )
+
+          expect(settings.issue_template_content).to eq('group template')
+        end
+      end
+
+      context 'for instance templates' do
+        before do
+          stub_licensed_features(custom_file_templates: true)
+          stub_ee_application_setting(file_template_project: project_with_instance_template)
+        end
+
+        it 'returns template content' do
+          settings = build(:service_desk_setting, project: project, file_template_project_id: project_with_instance_template.id, issue_template_key: 'inherited_instance_template')
+
+          expect(settings.issue_template_content).to eq('instance template')
+        end
+      end
+    end
+  end
+end

ee/spec/requests/ee/projects/service_desk_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Projects::ServiceDeskController do
+  let_it_be(:project) do
+    create(:project, :private, :custom_repo, service_desk_enabled: true,
+           files: { '.gitlab/issue_templates/service_desk.md' => 'template' })
+  end
+
+  let_it_be(:template_project) { create(:project) }
+
+  let_it_be(:user) { create(:user) }
+
+  before do
+    project.add_maintainer(user)
+    sign_in(user)
+  end
+
+  describe 'PUT service desk properties' do
+    it 'sets file_template_project_id', :aggregate_failures do
+      params = {
+        namespace_id: project.namespace.to_param,
+        project_id: project,
+        issue_template_key: 'service_desk',
+        file_template_project_id: template_project.id,
+        format: :json
+      }
+
+      put namespace_project_service_desk_refresh_path(params)
+
+      settings = project.service_desk_setting
+      expect(settings).to be_present
+      expect(settings.issue_template_key).to eq('service_desk')
+      expect(json_response['template_file_missing']).to eq(false)
+      expect(json_response['issue_template_key']).to eq('service_desk')
+      expect(json_response['file_template_project_id']).to eq(template_project.id)
+    end
+  end
+end

spec/helpers/issuables_description_templates_helper_spec.rb

@@ -56,32 +56,17 @@ RSpec.describe IssuablesDescriptionTemplatesHelper, :clean_gitlab_redis_cache do
       let(:templates) do
         {
           "" => [
-            { name: "another_issue_template", id: "another_issue_template" },
-            { name: "custom_issue_template", id: "custom_issue_template" }
+            { name: "another_issue_template", id: "another_issue_template", project_id: project.id },
+            { name: "custom_issue_template", id: "custom_issue_template", project_id: project.id }
           ]
         }
       end
 
-      it 'returns project templates only' do
+      it 'returns project templates' do
         expect(helper.issuable_templates_names(Issue.new)).to eq(%w[another_issue_template custom_issue_template])
       end
     end
 
-    context 'without matching project templates' do
-      let(:templates) do
-        {
-          "Project Templates" => [
-            { name: "another_issue_template", id: "another_issue_template", project_id: non_existing_record_id },
-            { name: "custom_issue_template", id: "custom_issue_template", project_id: non_existing_record_id }
-          ]
-        }
-      end
-
-      it 'returns empty array' do
-        expect(helper.issuable_templates_names(Issue.new)).to eq([])
-      end
-    end
-
     context 'when there are not templates in the project' do
       let(:templates) { {} }
 

spec/lib/gitlab/email/handler/service_desk_handler_spec.rb

@@ -353,13 +353,4 @@ RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
       expect { receiver.execute rescue nil }.not_to change { Issue.count }
     end
   end
-
-  def email_fixture(path)
-    fixture_file(path).gsub('project_id', project.project_id.to_s)
-  end
-
-  def service_desk_fixture(path, slug: nil, key: 'mykey')
-    slug ||= project.full_path_slug.to_s
-    fixture_file(path).gsub('project_slug', slug).gsub('project_key', key)
-  end
 end

spec/lib/gitlab/import_export/all_models.yml

@@ -771,3 +771,5 @@ push_rule:
   - group
 bulk_import_export:
   - group
+service_desk_setting:
+  - file_template_project

spec/support/shared_contexts/email_shared_context.rb

@@ -18,6 +18,15 @@ RSpec.shared_context :email_shared_context do
   end
 end
 
+def email_fixture(path)
+  fixture_file(path).gsub('project_id', project.project_id.to_s)
+end
+
+def service_desk_fixture(path, slug: nil, key: 'mykey')
+  slug ||= project.full_path_slug.to_s
+  fixture_file(path).gsub('project_slug', slug).gsub('project_key', key)
+end
+
 RSpec.shared_examples :reply_processing_shared_examples do
   context 'when the user could not be found' do
     before do