add user agent details API endpoints to issues and snippets

lib/api/issues.rb

@@ -241,6 +241,23 @@ module API
 
         present paginate(merge_requests), with: Entities::MergeRequestBasic, current_user: current_user, project: user_project
       end
+
+      desc 'Get the user agent details for an issue' do
+        success Entities::UserAgentDetail
+      end
+      params do
+        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
+      end
+      get ":id/issues/:issue_iid/user_agent_detail" do
+        authenticated_as_admin!
+
+        issue = find_project_issue(params[:issue_iid])
+
+        return not_found!('Issue') unless issue
+        return not_found!('UserAgentDetail') unless issue.user_agent_detail
+
+        present issue.user_agent_detail, with: Entities::UserAgentDetail, current_user: current_user, project: user_project
+      end
     end
   end
 end

lib/api/snippets.rb

@@ -140,6 +140,23 @@ module API
         content_type 'text/plain'
         present snippet.content
       end
+
+      desc 'Get the user agent details for a snippet' do
+        success Entities::UserAgentDetail
+      end
+      params do
+        requires :id, type: Integer, desc: 'The ID of a snippet'
+      end
+      get ":id/user_agent_detail" do
+        authenticated_as_admin!
+
+        snippet = Snippet.find_by(id: params[:id])
+
+        return not_found!('Snippet') unless snippet
+        return not_found!('UserAgentDetail') unless snippet.user_agent_detail
+
+        present snippet.user_agent_detail, with: Entities::UserAgentDetail
+      end
     end
   end
 end

spec/requests/api/issues_spec.rb

@@ -1463,7 +1463,7 @@ describe API::Issues do
   end
 
   describe "GET /projects/:id/issues/:issue_iid/user_agent_detail" do
-    let(:user_agent_detail) { create(:user_agent_detail, subject: issue) }
+    let!(:user_agent_detail) { create(:user_agent_detail, subject: issue) }
 
     it 'exposes known attributes' do
       get api("/projects/#{project.id}/issues/#{issue.iid}/user_agent_detail", admin)