(mvc) add validator for string list types (csv type data)

src/opnsense/mvc/app/models/OPNsense/Base/Validators/CsvListValidator.php

+<?php
+/**
+ *    Copyright (C) 2015 Deciso B.V.
+ *
+ *    All rights reserved.
+ *
+ *    Redistribution and use in source and binary forms, with or without
+ *    modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *    POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+namespace OPNsense\Base\Validators;
+
+use \Phalcon\Validation\Validator;
+use \Phalcon\Validation\ValidatorInterface;
+use \Phalcon\Validation\Message;
+
+/**
+ * Class CsvListValidator validate a string list against a list of options
+ * @package OPNsense\Base\Validators
+ */
+class CsvListValidator extends Validator implements ValidatorInterface
+{
+
+    /**
+     * Executes validation
+     *
+     * @param \Phalcon\Validation $validator
+     * @param string $attribute
+     * @return boolean
+     */
+    public function validate(\Phalcon\Validation $validator, $attribute)
+    {
+        $value = $validator->getValue($attribute);
+        $domain = $this->getOption('domain');
+        $msg = $this->getOption('message');
+
+        foreach (explode(",", $value) as $valItem) {
+            if (!in_array($valItem, $domain)) {
+                $validator->appendMessage(new Message($msg, $attribute, 'CsvListValidator'));
+                return false;
+            }
+        }
+
+        return true;
+    }
+}