Add data required for note form

app/controllers/projects/issues_controller.rb

@@ -92,7 +92,7 @@ class Projects::IssuesController < Projects::ApplicationController
     respond_to do |format|
       format.html
       format.json do
-        render json: IssueSerializer.new.represent(@issue)
+        render json: serializer.represent(@issue)
       end
     end
   end
@@ -152,7 +152,7 @@ class Projects::IssuesController < Projects::ApplicationController
       format.json do
         if @issue.valid?
-          render json: IssueSerializer.new.represent(@issue)
+          render json: serializer.represent(@issue)
         else
           render json: { errors: @issue.errors.full_messages }, status: :unprocessable_entity
         end
@@ -308,4 +308,8 @@ class Projects::IssuesController < Projects::ApplicationController
     redirect_to new_user_session_path, notice: notice
   end
+
+  def serializer
+    IssueSerializer.new(current_user: current_user, project: issue.project)
+  end
 end

app/helpers/issuables_helper.rb

@@ -35,7 +35,7 @@ module IssuablesHelper
   def serialize_issuable(issuable)
     case issuable
     when Issue
-      IssueSerializer.new.represent(issuable).to_json
+      IssueSerializer.new(current_user: current_user, project: issuable.project).represent(issuable).to_json
     when MergeRequest
       MergeRequestSerializer
         .new(current_user: current_user, project: issuable.project)

app/serializers/issuable_entity.rb

@@ -15,4 +15,6 @@ class IssuableEntity < Grape::Entity
   expose :total_time_spent
   expose :human_time_estimate
   expose :human_total_time_spent
+  expose :milestone, using: API::Entities::Milestone
+  expose :labels, using: LabelEntity
 end

app/serializers/issue_entity.rb

@@ -7,10 +7,26 @@ class IssueEntity < IssuableEntity
   expose :due_date
   expose :moved_to_id
   expose :project_id
-  expose :milestone, using: API::Entities::Milestone
-  expose :labels, using: LabelEntity
   expose :web_url do |issue|
     project_issue_path(issue.project, issue)
   end
+
+  expose :current_user do
+    expose :can_create_note do |issue|
+      can?(request.current_user, :create_note, issue.project)
+    end
+
+    expose :can_update do |issue|
+      can?(request.current_user, :update_issue, issue)
+    end
+  end
+
+  expose :create_note_path do |issue|
+    namespace_project_notes_path(issue.project.namespace, issue.project, noteable_type: 'Issue', noteable_id: issue.id, target_type: 'issue', target_id: issue.id)
+  end
+
+  expose :preview_note_path do |issue|
+    preview_markdown_path(issue.project, quick_actions_target_type: 'Issue', quick_actions_target_id: issue.id)
+  end
 end

app/serializers/user_serializer.rb

+class UserSerializer < BaseSerializer
+  entity UserEntity
+end

app/views/projects/issues/_discussion.html.haml

@@ -12,3 +12,9 @@
 / #notes{style: "margin-top: 150px"}
 /   = render 'shared/notes/notes_with_form', :autocomplete => true
+
+:javascript
+  window.gl.issueData = #{serialize_issuable(@issue)};
+  window.gl.currentUserData = #{UserSerializer.new.represent(current_user).to_json};
+
+%section#note-form{ data: { new_session_path: new_session_path(:user, redirect_to_referer: 'yes') } }