Add Unleash API compatible interface

lib/api/api.rb

@@ -158,6 +158,7 @@ module API
     mount ::API::Templates
     mount ::API::Todos
     mount ::API::Triggers
+    mount ::API::Unleash
     mount ::API::Users
     mount ::API::Variables
     mount ::API::Version

lib/api/entities.rb

@@ -1515,6 +1515,40 @@ module API
       end
       expose :label, using: Entities::LabelBasic
       expose :action
+
+    class UnleashIssue < Grape::Entity
+      expose :name
+      expose :title, as: :description
+      expose :enabled
+      expose :strategies
+
+      private
+
+      def name
+        "\##{object.iid}"
+      end
+
+      def enabled
+        true
+      end
+
+      def strategies
+        [{ name: 'default' }]
+      end
+    end
+
+    class UnleashFeatureResponse < Grape::Entity
+      expose :version
+      expose :features, with: UnleashIssue
+
+      private
+
+      def version
+        1
+      end
+
+      def features
+      end
     end
   end
 end

lib/api/unleash.rb

+module API
+  class Unleash < Grape::API
+    include PaginationParams
+
+    #before { authenticate! }
+
+    params do
+      requires :id, type: String, desc: 'The ID of a project'
+    end
+    resource :projects, requirements: API::PROJECT_ENDPOINT_REQUIREMENTS do
+      get ':id/unleash/features' do
+        issues = IssuesFinder.new(current_user, project_id: user_project.id, label_name: 'rollout')
+        present issues, with: Entities::UnleashFeatureResponse
+      end
+
+      post ':id/unleash/client/register' do
+        status :ok
+      end
+
+      post ':id/unleash/client/metrics' do
+        status :ok
+      end
+    end
+  end
+end