Expose ProjectHook attributes via API

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/api/entities.rb

@@ -24,6 +24,10 @@ module API
       expose :id, :url, :created_at
     end
 
+    class ProjectHook < Hook
+      expose :project_id, :push_events, :issues_events, :merge_requests_events
+    end
+
     class ForkedFromProject < Grape::Entity
       expose :id
       expose :name, :name_with_namespace

lib/api/project_hooks.rb

@@ -22,7 +22,7 @@ module API
       #   GET /projects/:id/hooks
       get ":id/hooks" do
         @hooks = paginate user_project.hooks
-        present @hooks, with: Entities::Hook
+        present @hooks, with: Entities::ProjectHook
       end
 
       # Get a project hook
@@ -34,7 +34,7 @@ module API
       #   GET /projects/:id/hooks/:hook_id
       get ":id/hooks/:hook_id" do
         @hook = user_project.hooks.find(params[:hook_id])
-        present @hook, with: Entities::Hook
+        present @hook, with: Entities::ProjectHook
       end
 
 
@@ -50,7 +50,7 @@ module API
 
         @hook = user_project.hooks.new({"url" => params[:url]})
         if @hook.save
-          present @hook, with: Entities::Hook
+          present @hook, with: Entities::ProjectHook
         else
           if @hook.errors[:url].present?
             error!("Invalid url given", 422)
@@ -73,7 +73,7 @@ module API
 
         attrs = attributes_for_keys [:url]
         if @hook.update_attributes attrs
-          present @hook, with: Entities::Hook
+          present @hook, with: Entities::ProjectHook
         else
           if @hook.errors[:url].present?
             error!("Invalid url given", 422)