Add new API endpoint - get a namespace by ID

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/api/namespaces.rb b/lib/api/namespaces.rb
index f1eaff6b0eb..21dc5009d0e 100644
--- a/lib/api/namespaces.rb
+++ b/lib/api/namespaces.rb
@@ -19,6 +19,30 @@ module API
 
         present paginate(namespaces), with: Entities::Namespace, current_user: current_user
       end
+
+      desc 'Get a namespace by ID' do
+        success Entities::Namespace
+      end
+      params do
+        requires :id, type: Integer, desc: "Namespace's ID"
+      end
+      get ':id' do
+        namespace = Namespace.find(params[:id])
+        authenticate_get_namespace!(namespace)
+
+        present namespace, with: Entities::Namespace, current_user: current_user
+      end
+    end
+
+    helpers do
+      def authenticate_get_namespace!(namespace)
+        return if current_user.admin?
+        forbidden!('No access granted') unless user_can_access_namespace?(namespace)
+      end
+
+      def user_can_access_namespace?(namespace)
+        namespace.has_owner?(current_user)
+      end
     end
   end
 end