New module 'HTML Purifier'

sites/all/modules/htmlpurifier/HTMLPurifier_DefinitionCache_Drupal.php

@@ -0,0 +1,95 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache.php';
+
+/**
+ * Cache handler that stores all data in drupals builtin cache
+ */
+class HTMLPurifier_DefinitionCache_Drupal extends HTMLPurifier_DefinitionCache
+{
+  /**
+   * Add an object to the cache without overwriting
+   */
+  function add($def, $config) {
+    if (!$this->checkDefType($def)) return;
+    $key = $this->generateKey($config);
+
+    if ($this->fetchFromDrupalCache($key)) {
+      // already cached
+      return false;
+    }
+    $this->storeInDrupalCache($def, $key);
+    return true;
+  }
+
+  /**
+   * Unconditionally add an object to the cache, overwrites any existing object. 
+   */
+  function set($def, $config) {
+    if (!$this->checkDefType($def)) return;
+    $key = $this->generateKey($config);
+
+    $this->storeInDrupalCache($def, $key);
+    return true;
+  }
+
+  /**
+   * Replace an object that already exists in the cache.
+   */
+  function replace($def, $config) {
+    if (!$this->checkDefType($def)) return;
+    $key = $this->generateKey($config);
+
+    if (!$this->fetchFromDrupalCache($key)) {
+      // object does not exist in cache
+      return false;
+    }
+
+    $this->storeInDrupalCache($def, $key);
+    return true;
+  }
+
+  /**
+   * Retrieve an object from the cache 
+   */
+  function get($config) {
+    $key = $this->generateKey($config);
+    return $this->fetchFromDrupalCache($key);
+  }
+
+  /**
+   * Delete an object from the cache 
+   */
+  function remove($config) {
+    $key = $this->generateKey($config);
+    cache_clear_all("htmlpurifier:$key", 'cache');
+    return true;
+  }
+
+  function flush($config) {
+    cache_clear_all("htmlpurifier:*", 'cache', true);
+    return true;
+  }
+
+  function cleanup($config) {
+    $res = db_query("SELECT cid FROM {cache} WHERE cid LIKE '%s%%'", 'htmlpurifier:');
+    while ($row = db_fetch_object($res)) {
+      $key = substr($row->cid, 13); // 13 == strlen('htmlpurifier:')
+      if ($this->isOld($key, $config)) {
+        cache_clear_all($row->cid, 'cache');
+      }
+    }
+  }
+
+  function fetchFromDrupalCache($key) {
+    $cached = cache_get("htmlpurifier:$key");
+    if ($cached) return unserialize($cached->data);
+    return false;
+  }
+
+  function storeInDrupalCache($def, $key) {
+    cache_set("htmlpurifier:$key", serialize($def), 'cache', CACHE_PERMANENT);
+  }
+  
+}
+