Checkout of Instiki Trunk 1/21/2007.

app/controllers/revision_sweeper.rb

@@ -0,0 +1,29 @@
+require_dependency 'cache_sweeping_helper'
+
+class RevisionSweeper < ActionController::Caching::Sweeper
+
+  include CacheSweepingHelper
+  
+  observe Revision, Page
+  
+  def after_save(record)
+    if record.is_a?(Revision)
+      expire_caches(record.page)
+    end
+  end
+  
+  def after_delete(record)
+    if record.is_a?(Page)
+      expire_caches(record)
+    end
+  end
+  
+  private
+  
+  def expire_caches(page)
+    expire_cached_summary_pages(page.web)
+    pages_to_expire = ([page.name] + WikiReference.pages_that_reference(page.name)).uniq
+    pages_to_expire.each { |page_name| expire_cached_page(page.web, page_name) }
+  end
+
+end