Add service desk information to project graphQL endpoint

- serviceDeskEnabled, serviceDeskAddress
- add new matcher for graphql

app/graphql/types/project_type.rb

@@ -159,3 +159,5 @@ module Types
           resolver: Resolvers::Projects::SnippetsResolver
   end
 end
+
+Types::ProjectType.prepend_if_ee('::EE::Types::ProjectType')

changelogs/unreleased/34261-service-desk-to-graphql.yml

+---
+title: Add service desk information to project graphQL endpoint
+merge_request: 20722
+author:
+type: changed

doc/api/graphql/reference/gitlab_schema.graphql

@@ -4551,6 +4551,16 @@ type Project {
     id: ID!
   ): SentryDetailedError
 
+  """
+  E-mail address of the service desk.
+  """
+  serviceDeskAddress: String
+
+  """
+  Indicates if the project has service desk enabled.
+  """
+  serviceDeskEnabled: Boolean
+
   """
   Indicates if shared runners are enabled on the project
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -1314,6 +1314,34 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "serviceDeskAddress",
+              "description": "E-mail address of the service desk.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "serviceDeskEnabled",
+              "description": "Indicates if the project has service desk enabled.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "Boolean",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "sharedRunnersEnabled",
               "description": "Indicates if shared runners are enabled on the project",

doc/api/graphql/reference/index.md

@@ -668,6 +668,8 @@ The API can be explored interactively using the [GraphiQL IDE](../index.md#graph
 | `mergeRequest` | MergeRequest | A single merge request of the project |
 | `issue` | Issue | A single issue of the project |
 | `sentryDetailedError` | SentryDetailedError | Detailed version of a Sentry error on the project |
+| `serviceDeskEnabled` | Boolean | Indicates if the project has service desk enabled. |
+| `serviceDeskAddress` | String | E-mail address of the service desk. |
 
 ### ProjectPermissions
 

ee/app/graphql/ee/types/project_type.rb

+# frozen_string_literal: true
+
+module EE
+  module Types
+    module ProjectType
+      extend ActiveSupport::Concern
+
+      prepended do
+        field :service_desk_enabled, GraphQL::BOOLEAN_TYPE, null: true,
+          description: 'Indicates if the project has service desk enabled.'
+
+        field :service_desk_address, GraphQL::STRING_TYPE, null: true,
+          description: 'E-mail address of the service desk.'
+      end
+    end
+  end
+end

ee/spec/graphql/types/project_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe GitlabSchema.types['Project'] do
+  it 'includes the ee specific fields' do
+    expected_fields = %w[service_desk_enabled service_desk_address]
+
+    is_expected.to include_graphql_fields(*expected_fields)
+  end
+end

spec/graphql/types/project_type_spec.rb

@@ -25,7 +25,7 @@ describe GitlabSchema.types['Project'] do
       issue pipelines removeSourceBranchAfterMerge sentryDetailedError snippets
     ]
 
-    is_expected.to have_graphql_fields(*expected_fields)
+    is_expected.to include_graphql_fields(*expected_fields)
   end
 
   describe 'issue field' do

spec/support/matchers/graphql_matchers.rb

@@ -28,6 +28,19 @@ RSpec::Matchers.define :have_graphql_fields do |*expected|
   end
 end
 
+RSpec::Matchers.define :include_graphql_fields do |*expected|
+  expected_field_names = expected.map { |name| GraphqlHelpers.fieldnamerize(name) }
+
+  match do |kls|
+    expect(kls.fields.keys).to include(*expected_field_names)
+  end
+
+  failure_message do |kls|
+    missing = expected_field_names - kls.fields.keys
+    "is missing fields: <#{missing.inspect}>" if missing.any?
+  end
+end
+
 RSpec::Matchers.define :have_graphql_field do |field_name, args = {}|
   match do |kls|
     field = kls.fields[GraphqlHelpers.fieldnamerize(field_name)]