Update page epic init data to include new date fields

ee/app/helpers/epics_helper.rb

@@ -16,11 +16,23 @@ module EpicsHelper
       todo_exists: todo.present?,
       todo_path: group_todos_path(group),
       start_date: epic.start_date,
+      due_date: epic.due_date,
       end_date: epic.end_date
     }
 
     epic_meta[:todo_delete_path] = dashboard_todo_path(todo) if todo.present?
 
+    if Ability.allowed?(current_user, :update_epic, epic.group)
+      epic_meta.merge!(
+        start_date_fixed: epic.start_date_fixed,
+        start_date_is_fixed: epic.start_date_is_fixed?,
+        start_date_from_milestones: epic.start_date_from_milestones,
+        due_date_fixed: epic.due_date_fixed,
+        due_date_is_fixed: epic.due_date_is_fixed?,
+        due_date_from_milestones: epic.due_date_from_milestones
+      )
+    end
+
     participants = UserSerializer.new.represent(epic.participants)
     initial = opts[:initial].merge(labels: epic.labels,
                                    participants: participants,

ee/spec/helpers/epics_helper_spec.rb

@@ -4,18 +4,21 @@ describe EpicsHelper do
   include ApplicationHelper
 
   describe '#epic_show_app_data' do
-    it 'returns the correct json' do
-      user = create(:user)
-      @epic = create(:epic, author: user)
+    let(:user) { create(:user) }
+    let!(:epic) { create(:epic, author: user) }
 
+    before do
       allow(helper).to receive(:current_user).and_return(user)
+      stub_licensed_features(epics: true)
+    end
 
-      data = helper.epic_show_app_data(@epic, initial: {}, author_icon: 'icon_path')
+    it 'returns the correct json' do
+      data = helper.epic_show_app_data(epic, initial: {}, author_icon: 'icon_path')
       meta_data = JSON.parse(data[:meta])
 
       expected_keys = %i(initial meta namespace labels_path toggle_subscription_path labels_web_url epics_web_url)
       expect(data.keys).to match_array(expected_keys)
-      expect(meta_data.keys).to match_array(%w[created author start_date end_date epic_id todo_exists todo_path])
+      expect(meta_data.keys).to match_array(%w[created author start_date end_date due_date epic_id todo_exists todo_path])
       expect(meta_data['author']).to eq({
         'name' => user.name,
         'url' => "/#{user.username}",
@@ -23,6 +26,23 @@ describe EpicsHelper do
         'src' => 'icon_path'
       })
     end
+
+    context 'when user has edit permission' do
+      before do
+        epic.group.add_developer(user)
+      end
+
+      it 'returns extra date fields if user can edit' do
+        data = helper.epic_show_app_data(epic, initial: {}, author_icon: 'icon_path')
+        meta_data = JSON.parse(data[:meta])
+
+        expect(meta_data.keys).to match_array(%w[
+          created author
+          start_date start_date_fixed start_date_is_fixed start_date_from_milestones
+          end_date due_date due_date_fixed due_date_is_fixed due_date_from_milestones
+        ])
+      end
+    end
   end
 
   describe '#epic_endpoint_query_params' do