Refactor validators so that they can be reused between directives and namespaces.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1589 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/ConfigSchema/Validator/Alnum.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Validates that a field is alphanumeric in the array (does not check
+ * existence!)
+ */
+class HTMLPurifier_ConfigSchema_Validator_Alnum extends HTMLPurifier_ConfigSchema_Validator
+{
+    
+    protected $index;
+    
+    public function __construct($index) {
+        $this->index = $index;
+    }
+    
+    public function validate(&$arr, $interchange) {
+        if (!ctype_alnum($arr[$this->index])) {
+            throw new HTMLPurifier_ConfigSchema_Exception($arr[$this->index] . ' in '. $this->index .' must be alphanumeric');
+        }
+    }
+    
+}

library/HTMLPurifier/ConfigSchema/Validator/Exists.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Validates that an field exists in the array
+ */
+class HTMLPurifier_ConfigSchema_Validator_Exists extends HTMLPurifier_ConfigSchema_Validator
+{
+    
+    protected $index;
+    
+    public function __construct($index) {
+        $this->index = $index;
+    }
+    
+    public function validate(&$arr, $interchange) {
+        if (empty($arr[$this->index])) {
+            throw new HTMLPurifier_ConfigSchema_Exception($this->index . ' must exist');
+        }
+    }
+    
+}

library/HTMLPurifier/ConfigSchema/Validator/IdExists.php

@@ -1,15 +0,0 @@
-<?php
-
-/**
- * Validates that an ID field exists in the array
- */
-class HTMLPurifier_ConfigSchema_Validator_IdExists extends HTMLPurifier_ConfigSchema_Validator
-{
-    
-    public function validate(&$arr, $interchange, $type) {
-        if (!isset($arr['ID'])) {
-            throw new HTMLPurifier_ConfigSchema_Exception('ID must exist in ' . $type);
-        }
-    }
-    
-}