Refactor a SSOT for integration event descriptions

app/helpers/integrations_helper.rb

 # frozen_string_literal: true
 
 module IntegrationsHelper
-  def integration_event_description(event)
-    case event
-    when "push", "push_events"
-      s_("ProjectService|Trigger event for pushes to the repository.")
-    when "tag_push", "tag_push_events"
-      s_("ProjectService|Trigger event for new tags pushed to the repository.")
-    when "note", "note_events"
-      s_("ProjectService|Trigger event for new comments.")
-    when "confidential_note", "confidential_note_events"
-      s_("ProjectService|Trigger event for new comments on confidential issues.")
-    when "issue", "issue_events"
-      s_("ProjectService|Trigger event when an issue is created, updated, or closed.")
-    when "confidential_issue", "confidential_issue_events"
-      s_("ProjectService|Trigger event when a confidential issue is created, updated, or closed.")
-    when "merge_request", "merge_request_events"
-      s_("ProjectService|Trigger event when a merge request is created, updated, or merged.")
-    when "pipeline", "pipeline_events"
-      s_("ProjectService|Trigger event when a pipeline status changes.")
-    when "wiki_page", "wiki_page_events"
-      s_("ProjectService|Trigger event when a wiki page is created or updated.")
-    when "commit", "commit_events"
-      s_("ProjectService|Trigger event when a commit is created or updated.")
-    when "deployment"
-      s_("ProjectService|Trigger event when a deployment starts or finishes.")
-    when "alert"
-      s_("ProjectService|Trigger event when a new, unique alert is recorded.")
+  def integration_event_description(integration, event)
+    case integration
+    when Integrations::Jira
+      jira_integration_event_description(event)
+    when Integrations::Teamcity
+      teamcity_integration_event_description(event)
+    else
+      default_integration_event_description(event)
     end
   end
 
@@ -144,6 +126,53 @@ module IntegrationsHelper
 
   private
 
+  def jira_integration_event_description(event)
+    case event
+    when "merge_request", "merge_request_events"
+      s_("JiraService|Jira comments are created when an issue is referenced in a merge request.")
+    when "commit", "commit_events"
+      s_("JiraService|Jira comments are created when an issue is referenced in a commit.")
+    end
+  end
+
+  def teamcity_integration_event_description(event)
+    case event
+    when 'push', 'push_events'
+      s_('TeamcityIntegration|Trigger TeamCity CI after every push to the repository, except branch delete')
+    when 'merge_request', 'merge_request_events'
+      s_('TeamcityIntegration|Trigger TeamCity CI after a merge request has been created or updated')
+    end
+  end
+
+  def default_integration_event_description(event)
+    case event
+    when "push", "push_events"
+      s_("ProjectService|Trigger event for pushes to the repository.")
+    when "tag_push", "tag_push_events"
+      s_("ProjectService|Trigger event for new tags pushed to the repository.")
+    when "note", "note_events"
+      s_("ProjectService|Trigger event for new comments.")
+    when "confidential_note", "confidential_note_events"
+      s_("ProjectService|Trigger event for new comments on confidential issues.")
+    when "issue", "issue_events"
+      s_("ProjectService|Trigger event when an issue is created, updated, or closed.")
+    when "confidential_issue", "confidential_issue_events"
+      s_("ProjectService|Trigger event when a confidential issue is created, updated, or closed.")
+    when "merge_request", "merge_request_events"
+      s_("ProjectService|Trigger event when a merge request is created, updated, or merged.")
+    when "pipeline", "pipeline_events"
+      s_("ProjectService|Trigger event when a pipeline status changes.")
+    when "wiki_page", "wiki_page_events"
+      s_("ProjectService|Trigger event when a wiki page is created or updated.")
+    when "commit", "commit_events"
+      s_("ProjectService|Trigger event when a commit is created or updated.")
+    when "deployment"
+      s_("ProjectService|Trigger event when a deployment starts or finishes.")
+    when "alert"
+      s_("ProjectService|Trigger event when a new, unique alert is recorded.")
+    end
+  end
+
   def trigger_events_for_integration(integration)
     ServiceEventSerializer.new(service: integration).represent(integration.configurable_events).to_json
   end

app/models/integration.rb

@@ -172,10 +172,6 @@ class Integration < ApplicationRecord
     'push'
   end
 
-  def self.event_description(event)
-    IntegrationsHelper.integration_event_description(event)
-  end
-
   def self.find_or_create_templates
     create_nonexistent_templates
     for_template

app/models/integrations/jira.rb

@@ -577,15 +577,6 @@ module Integrations
         data_fields.deployment_server!
       end
     end
-
-    def self.event_description(event)
-      case event
-      when "merge_request", "merge_request_events"
-        s_("JiraService|Jira comments are created when an issue is referenced in a merge request.")
-      when "commit", "commit_events"
-        s_("JiraService|Jira comments are created when an issue is referenced in a commit.")
-      end
-    end
   end
 end
 

app/models/integrations/teamcity.rb

@@ -29,15 +29,6 @@ module Integrations
       def supported_events
         %w(push merge_request)
       end
-
-      def event_description(event)
-        case event
-        when 'push', 'push_events'
-          'TeamCity CI will be triggered after every push to the repository except branch delete'
-        when 'merge_request', 'merge_request_events'
-          'TeamCity CI will be triggered after a merge request has been created or updated'
-        end
-      end
     end
 
     def compose_service_hook

app/serializers/service_event_entity.rb

@@ -14,7 +14,7 @@ class ServiceEventEntity < Grape::Entity
   end
 
   expose :description do |event|
-    IntegrationsHelper.integration_event_description(event)
+    IntegrationsHelper.integration_event_description(integration, event)
   end
 
   expose :field, if: -> (_, _) { event_field } do

lib/api/services.rb

@@ -23,14 +23,14 @@ module API
 
     INTEGRATIONS = integrations.freeze
 
-    integration_classes.each do |service|
-      event_names = service.try(:event_names) || next
+    integration_classes.each do |integration|
+      event_names = integration.try(:event_names) || next
       event_names.each do |event_name|
-        INTEGRATIONS[service.to_param.tr("_", "-")] << {
+        INTEGRATIONS[integration.to_param.tr("_", "-")] << {
           required: false,
           name: event_name.to_sym,
           type: String,
-          desc: service.event_description(event_name)
+          desc: IntegrationsHelper.integration_event_description(integration, event_name)
         }
       end
     end

locale/gitlab.pot

@@ -31878,6 +31878,12 @@ msgstr ""
 msgid "Team domain"
 msgstr ""
 
+msgid "TeamcityIntegration|Trigger TeamCity CI after a merge request has been created or updated"
+msgstr ""
+
+msgid "TeamcityIntegration|Trigger TeamCity CI after every push to the repository, except branch delete"
+msgstr ""
+
 msgid "Telephone number"
 msgstr ""
 

spec/helpers/integrations_helper_spec.rb

@@ -3,6 +3,22 @@
 require 'spec_helper'
 
 RSpec.describe IntegrationsHelper do
+  describe '#integration_event_description' do
+    subject(:description) { helper.integration_event_description(integration, 'merge_request_events') }
+
+    context 'when integration is Jira' do
+      let(:integration) { Integrations::Jira.new }
+
+      it { is_expected.to include('Jira') }
+    end
+
+    context 'when integration is Team City' do
+      let(:integration) { Integrations::Teamcity.new }
+
+      it { is_expected.to include('TeamCity') }
+    end
+  end
+
   describe '#integration_form_data' do
     let(:fields) do
       [