Adds possibility to configure Purifier-Filter dynamically

src/Soflomo/Purifier/Filter/Purifier.php

@@ -9,11 +9,55 @@ class Purifier implements FilterInterface
 {
     protected $purifier;
 
+    /**
+     * @var array
+     */
+    protected $purifierConfig;
+
+    /**
+     * @var bool
+     */
+    protected $persistentConf;
+
+
+
     public function __construct(HTMLPurifier $purifier)
     {
         $this->purifier = $purifier;
     }
 
+    /**
+     * Sets config after initialization, that is used and passed to the
+     * purify-method on filter() call
+     * @param array $config
+     * @param bool  $persistentConf
+     */
+    public function setConfig($config, $persistentConf = false)
+    {
+        $this->purifierConfig = $config;
+        $this->persistentConf = (bool) $persistentConf;
+    }
+
+
+
+    /**
+     * Retrieves the configuration set after initialization, resets config if
+     * $this->persistentConf is set to FALSE (means in this case method returns
+     * NULL on second call).
+     * 
+     * @return array|null
+     */
+    public function getConfig()
+    {
+        $config = $this->purifierConfig;
+        if (!$this->persistentConf) {
+            $this->purifierConfig = null;
+        }
+
+        return $config;
+    }
+
+
     protected function getPurifier()
     {
         return $this->purifier;
@@ -24,6 +68,9 @@ protected function getPurifier()
      */
     public function filter($value)
     {
+        if ($this->purifierConfig) {
+            return $this->getPurifier()->purify($value, $this->getConfig());
+        }
         return $this->getPurifier()->purify($value);
     }
-}
+}