Making use of GenericMutedWorker backgroundrb worker to clear an enti…

…re locale's cache if a locale has an interface change.

lib/kete_translatable_content/extensions/controllers/translations_controller.rb

@@ -1,3 +1,32 @@
 TranslationsController.class_eval do
   uses_tiny_mce :options => Kete.translatable_tiny_mce_options, :only => %w{ new edit }
+
+  include WorkerControllerHelpers
+
+  after_filter :expire_locale_cache, :only => [:create, :update]
+
+  private
+
+  # this is the big hammer for translation clearing
+  # it does the entire locale's cache if a translation changes
+  # only use on UI element related models
+  # Kete items (i.e. user generated content) should be done on an item by item basis
+  def expire_locale_cache
+    # leave Kete items to be cleared individually
+    return true if ZOOM_CLASSES.include?(@translatable_class.to_s)
+
+    expire_locale = @translation.locale
+    method_name = "clear_locale_cache"
+    options = { :locale_to_clear => expire_locale }
+
+    worker_type = :generic_muted_worker
+    worker_key = worker_key_for("generic_muted_worker_#{method_name}_#{expire_locale}")
+
+    # only allow a single cache clearing to happen at once
+    MiddleMan.new_worker( :worker => worker_type,
+                          :worker_key => worker_key )
+
+    MiddleMan.worker(worker_type, worker_key).async_do_work( :arg => { :method_name => method_name, :options => options } )
+    true
+  end
 end

rails/init.rb

@@ -40,6 +40,18 @@
       Kete.extensions[:blocks][key] << Proc.new { Kernel.load(ext_path) }
     end
 
+    # extend the Generic Muted Worker to have the expire_locale method
+    MethodsForGenericMutedWorker.module_eval do
+      def clear_locale_cache(options = { })
+        locale_to_clear = options[:locale_to_clear]
+        raise unless locale_to_clear
+
+        # WARNING: this relies on the fact that Kete's current caching scheme is file system based
+        # if an option for Memcache or other caching mechanism is used in the future
+        # this will need to be updated with logic to figure out correct clearing mechanism
+        file_path = "#{Rails.root}/tmp/cache/views/#{Kete.site_name}/#{locale_to_clear}"
+        FileUtils.rm_r(file_path, :force => true) if File.exist?(file_path) && File.directory?(file_path)
+      end
+    end
   end
-
 end