Merge pull request #1678 from ClearlyClaire/glitch-soc/fixes/robust-theme-fallback

Make theme-selection fall back to default ones if configured is not found

app/controllers/application_controller.rb

@@ -136,16 +136,6 @@ class ApplicationController < ActionController::Base
     @current_session = SessionActivation.find_by(session_id: cookies.signed['_session_id']) if cookies.signed['_session_id'].present?
   end
 
-  def current_flavour
-    return Setting.flavour unless Themes.instance.flavours.include? current_user&.setting_flavour
-    current_user.setting_flavour
-  end
-
-  def current_skin
-    return Setting.skin unless Themes.instance.skins_for(current_flavour).include? current_user&.setting_skin
-    current_user.setting_skin
-  end
-
   def respond_with_error(code)
     respond_to do |format|
       format.any do

app/controllers/concerns/theming_concern.rb

@@ -10,6 +10,15 @@ module ThemingConcern
 
   private
 
+  def current_flavour
+    [current_user&.setting_flavour, Setting.flavour, 'glitch', 'vanilla'].find { |flavour| Themes.instance.flavours.include?(flavour) }
+  end
+
+  def current_skin
+    skins = Themes.instance.skins_for(current_flavour)
+    [current_user&.setting_skin, Setting.skin, 'default'].find { |skin| skins.include?(skin) }
+  end
+
   def valid_pack_data?(data, pack_name)
     data['pack'].is_a?(Hash) && [String, Hash].any? { |c| data['pack'][pack_name].is_a?(c) }
   end