Add artifact information for job controller

gitlab-org/gitlab-ce#50101

app/serializers/build_details_entity.rb

@@ -9,6 +9,28 @@ class BuildDetailsEntity < JobEntity
 
   expose :metadata, using: BuildMetadataEntity
 
+  expose :artifact, if: -> (*) { can?(current_user, :read_build, build) } do
+    expose :download_path, if: -> (*) { build.artifacts? } do |build|
+      download_project_job_artifacts_path(project, build)
+    end
+
+    expose :browse_path, if: -> (*) { build.browsable_artifacts? } do |build|
+      browse_project_job_artifacts_path(project, build)
+    end
+
+    expose :keep_path, if: -> (*) { build.has_expiring_artifacts? && can?(current_user, :update_build, build) } do |build|
+      keep_project_job_artifacts_path(project, build)
+    end
+
+    expose :expire_at, if: -> (*) { build.artifacts_expire_at.present? } do |build|
+      build.artifacts_expire_at
+    end
+
+    expose :expired, if: -> (*) { build.artifacts_expire_at.present? } do |build|
+      build.artifacts_expired?
+    end
+  end
+
   expose :erased_by, if: -> (*) { build.erased? }, using: UserEntity
   expose :erase_path, if: -> (*) { build.erasable? && can?(current_user, :erase_build, build) } do |build|
     erase_project_job_path(project, build)

changelogs/unreleased/50101-add-artifact-information-to-job-api.yml

+---
+title: Send artifact information in job API
+merge_request: 50460
+author:
+type: other

spec/controllers/projects/jobs_controller_spec.rb

@@ -135,7 +135,7 @@ describe Projects::JobsController, :clean_gitlab_redis_shared_state do
       end
     end
 
-    context 'when requesting JSON' do
+    context 'when requesting JSON with failed job' do
       let(:merge_request) { create(:merge_request, source_project: project) }
 
       before do
@@ -150,9 +150,56 @@ describe Projects::JobsController, :clean_gitlab_redis_shared_state do
       it 'exposes needed information' do
         expect(response).to have_gitlab_http_status(:ok)
         expect(json_response['raw_path']).to match(%r{jobs/\d+/raw\z})
+        expect(json_response['merge_request']['path']).to match(%r{merge_requests/\d+\z})
+        expect(json_response['new_issue_path']).to include('/issues/new')
+      end
+    end
+
+    context 'when request JSON for successful job' do
+      let(:merge_request) { create(:merge_request, source_project: project) }
+      let(:job) { create(:ci_build, :success, :artifacts, pipeline: pipeline) }
+
+      before do
+        project.add_developer(user)
+        sign_in(user)
+
+        allow_any_instance_of(Ci::Build).to receive(:merge_request).and_return(merge_request)
+
+        get_show(id: job.id, format: :json)
+      end
+
+      it 'exposes needed information' do
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response['artifact']['download_path']).to match(%r{artifacts/download})
+        expect(json_response['artifact']['browse_path']).to match(%r{artifacts/browse})
+        expect(json_response['artifact']).not_to have_key(:expired)
+        expect(json_response['artifact']).not_to have_key(:expired_at)
+        expect(json_response['raw_path']).to match(%r{jobs/\d+/raw\z})
         expect(json_response.dig('merge_request', 'path')).to match(%r{merge_requests/\d+\z})
-        expect(json_response['new_issue_path'])
-          .to include('/issues/new')
+      end
+
+      context 'when request JSON for successful job and expired artifacts' do
+        let(:merge_request) { create(:merge_request, source_project: project) }
+        let(:job) { create(:ci_build, :success, :artifacts, :expired, pipeline: pipeline) }
+
+        before do
+          project.add_developer(user)
+          sign_in(user)
+
+          allow_any_instance_of(Ci::Build).to receive(:merge_request).and_return(merge_request)
+
+          get_show(id: job.id, format: :json)
+        end
+
+        it 'exposes needed information' do
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response['artifact']).not_to have_key(:download_path)
+          expect(json_response['artifact']).not_to have_key(:browse_path)
+          expect(json_response['artifact']['expired']).to eq(true)
+          expect(json_response['artifact']['expire_at']).not_to be_empty
+          expect(json_response['raw_path']).to match(%r{jobs/\d+/raw\z})
+          expect(json_response.dig('merge_request', 'path')).to match(%r{merge_requests/\d+\z})
+        end
       end
     end