Restructure Epic data map structure for refactored Epic app

ee/app/helpers/epics_helper.rb

 module EpicsHelper
   def epic_show_app_data(epic, opts)
-    author = epic.author
     group = epic.group
     todo = issuable_todo(epic)
 
     epic_meta = {
       epic_id: epic.id,
       created: epic.created_at,
-      author: {
-        name: author.name,
-        url: user_path(author),
-        username: "@#{author.username}",
-        src: opts[:author_icon]
-      },
+      author: epic_author(epic, opts),
       todo_exists: todo.present?,
       todo_path: group_todos_path(group),
       start_date: epic.start_date,
@@ -34,7 +28,12 @@ module EpicsHelper
         due_date: epic.due_date_sourcing_milestone&.due_date
       },
       end_date: epic.end_date,
-      state: epic.state
+      state: epic.state,
+      namespace: group.path,
+      labels_path: group_labels_path(group, format: :json, only_group_labels: true, include_ancestor_groups: true),
+      toggle_subscription_path: toggle_subscription_group_epic_path(group, epic),
+      labels_web_url: group_labels_path(group),
+      epics_web_url: group_epics_path(group)
     }
 
     epic_meta[:todo_delete_path] = dashboard_todo_path(todo) if todo.present?
@@ -44,6 +43,8 @@ module EpicsHelper
                                    participants: participants,
                                    subscribed: epic.subscribed?(current_user))
 
+    # TODO: Remove from `namespace` to epics_web_url
+    # from below as it is already included in `epic_meta`
     {
       initial: initial.to_json,
       meta: epic_meta.to_json,
@@ -55,6 +56,15 @@ module EpicsHelper
     }
   end
 
+  def epic_author(epic, opts)
+    {
+      name: epic.author.name,
+      url: user_path(epic.author),
+      username: "@#{epic.author.username}",
+      src: opts[:author_icon]
+    }
+  end
+
   def epic_endpoint_query_params(opts)
     opts[:data] ||= {}
     opts[:data][:endpoint_query_params] = {

ee/spec/helpers/epics_helper_spec.rb

@@ -30,10 +30,12 @@ describe EpicsHelper do
       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 epic_id todo_exists todo_path state
-        start_date start_date_fixed start_date_is_fixed start_date_from_milestones start_date_sourcing_milestone_title
-        end_date due_date due_date_fixed due_date_is_fixed due_date_from_milestones due_date_sourcing_milestone_title
-        start_date_sourcing_milestone_dates due_date_sourcing_milestone_dates
+        epic_id created author todo_exists todo_path start_date
+        start_date_is_fixed start_date_fixed start_date_from_milestones
+        start_date_sourcing_milestone_title start_date_sourcing_milestone_dates
+        due_date due_date_is_fixed due_date_fixed due_date_from_milestones due_date_sourcing_milestone_title
+        due_date_sourcing_milestone_dates end_date state namespace labels_path toggle_subscription_path
+        labels_web_url epics_web_url
       ])
       expect(meta_data['author']).to eq({
         'name' => user.name,
@@ -74,15 +76,21 @@ describe EpicsHelper do
         meta_data = JSON.parse(data[:meta])
 
         expect(meta_data.keys).to match_array(%w[
-          created author epic_id todo_exists todo_path state
-          start_date start_date_fixed start_date_is_fixed start_date_from_milestones start_date_sourcing_milestone_title
-          end_date due_date due_date_fixed due_date_is_fixed due_date_from_milestones due_date_sourcing_milestone_title
-          start_date_sourcing_milestone_dates due_date_sourcing_milestone_dates
+          epic_id created author todo_exists todo_path start_date
+          start_date_is_fixed start_date_fixed start_date_from_milestones
+          start_date_sourcing_milestone_title start_date_sourcing_milestone_dates
+          due_date due_date_is_fixed due_date_fixed due_date_from_milestones due_date_sourcing_milestone_title
+          due_date_sourcing_milestone_dates end_date state namespace labels_path toggle_subscription_path
+          labels_web_url epics_web_url
         ])
         expect(meta_data['start_date']).to eq('2000-01-01')
         expect(meta_data['start_date_sourcing_milestone_title']).to eq(milestone1.title)
+        expect(meta_data['start_date_sourcing_milestone_dates']['start_date']).to eq(milestone1.start_date.to_s)
+        expect(meta_data['start_date_sourcing_milestone_dates']['due_date']).to eq(milestone1.due_date.to_s)
         expect(meta_data['due_date']).to eq('2000-01-02')
         expect(meta_data['due_date_sourcing_milestone_title']).to eq(milestone2.title)
+        expect(meta_data['due_date_sourcing_milestone_dates']['start_date']).to eq(milestone2.start_date.to_s)
+        expect(meta_data['due_date_sourcing_milestone_dates']['due_date']).to eq(milestone2.due_date.to_s)
       end
     end
   end