fix: some optimizations

app/controllers/api/qdc/resources_controller.rb

@@ -120,14 +120,10 @@ def country_language_preference
       user_device_language = request.query_parameters[:user_device_language]
       country = request.query_parameters[:country]&.upcase
 
-      if user_device_language.blank?
-        return render_bad_request('user_device_language is required')
+      if user_device_language.blank? || country.blank?
+        return render_bad_request("#{user_device_language.blank? ? 'user_device_language' : 'country'} is required")
       end
 
-      if country.blank?
-        return render_bad_request('country is required')
-      end
-
       unless Language.exists?(iso_code: user_device_language)
         return render_bad_request('Invalid user_device_language')
       end
@@ -143,22 +139,28 @@ def country_language_preference
                                       .find_by(user_device_language: user_device_language, country: nil)
 
       if @preference
-        @data = {
-          preference: @preference,
-          default_mushaf: @preference.mushaf,
-          default_translations: @preference.default_translation_ids.present? ? ResourceContent.where(id: @preference.default_translation_ids.split(',')).approved : [],
-          default_tafsir: @preference.tafsir,
-          default_wbw_language: @preference.wbw_language,
-          default_reciter: @preference.reciter,
-          ayah_reflections_languages: Language.where(iso_code: @preference.ayah_reflections_languages&.split(',') || []),
-          learning_plan_languages: Language.where(iso_code: @preference.learning_plan_languages&.split(',') || [])
-        }
+        @data = build_preference_data(@preference)
         render
       else
         render_404("No matching country language preference found")
       end
     end
 
+    private
+
+    def build_preference_data(preference)
+      {
+        preference: preference,
+        default_mushaf: preference.mushaf,
+        default_translations: preference.default_translation_ids.present? ? ResourceContent.where(id: preference.default_translation_ids.split(',')).approved : [],
+        default_tafsir: preference.tafsir,
+        default_wbw_language: preference.wbw_language,
+        default_reciter: preference.reciter,
+        ayah_reflections_languages: Language.where(iso_code: preference.ayah_reflections_languages&.split(',') || []),
+        learning_plan_languages: Language.where(iso_code: preference.learning_plan_languages&.split(',') || [])
+      }
+    end
+
     protected
 
     def load_translations