[CE backport]Add sort direction button with sort dropdown for epics

app/controllers/concerns/issuable_collections.rb

@@ -91,7 +91,7 @@ module IssuableCollections
     options = {
       scope: params[:scope],
       state: params[:state],
-      sort: set_sort_order_from_cookie || default_sort_order
+      sort: set_sort_order
     }
 
     # Used by view to highlight active option
@@ -113,6 +113,32 @@ module IssuableCollections
     'opened'
   end
 
+  def set_sort_order
+    set_sort_order_from_user_preference || set_sort_order_from_cookie || default_sort_order
+  end
+
+  def set_sort_order_from_user_preference
+    return unless current_user
+    return unless issuable_sorting_field
+
+    user_preference = current_user.user_preference
+
+    sort_param = params[:sort]
+    sort_param ||= user_preference[issuable_sorting_field]
+
+    if user_preference[issuable_sorting_field] != sort_param
+      user_preference.update_attribute(issuable_sorting_field, sort_param)
+    end
+
+    sort_param
+  end
+
+  # Implement default_sorting_field method on controllers
+  # to choose which column to store the sorting parameter.
+  def issuable_sorting_field
+    nil
+  end
+
   def set_sort_order_from_cookie
     sort_param = params[:sort] if params[:sort].present?
     # fallback to legacy cookie value for backward compatibility

spec/controllers/concerns/issuable_collections_spec.rb

@@ -86,6 +86,7 @@ describe IssuableCollections do
 
     it 'only allows whitelisted params' do
       allow(controller).to receive(:cookies).and_return({})
+      allow(controller).to receive(:current_user).and_return(nil)
 
       finder_options = controller.send(:finder_options)