lib/carrierwave/uploader/cache.rb in carrierwave-0.4.3 vs lib/carrierwave/uploader/cache.rb in carrierwave-0.4.4

@@ -23,10 +23,36 @@
     module Cache
 
       depends_on CarrierWave::Uploader::Callbacks
       depends_on CarrierWave::Uploader::Configuration
 
+      module ClassMethods
+
+        ##
+        # Removes cached files which are older than one day. You could call this method
+        # from a rake task to clean out old cached files.
+        #
+        # You can call this method directly on the module like this:
+        #
+        #   CarrierWave.clean_cached_files!
+        #
+        # === Note
+        # 
+        # This only works as long as you haven't done anything funky with your cache_dir.
+        # It's recommended that you keen cache files in one place only.
+        #
+        def clean_cached_files!
+          Dir.glob(File.expand_path(File.join(cache_dir, '*'), CarrierWave.root)).each do |dir|
+            time = dir.scan(/(\d{4})(\d{2})(\d{2})-(\d{2})(\d{2})/).first.map { |t| t.to_i }
+            time = Time.utc(*time)
+            if time < (Time.now - (60*60*24))
+              FileUtils.rm_rf(dir)
+            end
+          end
+        end
+      end
+
       ##
       # Returns true if the uploader has been cached
       #
       # === Returns
       #
@@ -114,6 +140,6 @@
         @original_filename = filename
       end
 
     end # Cache
   end # Uploader
-end # CarrierWave
\ No newline at end of file
+end # CarrierWave