first commit

components/com_contact/src/Rule/ContactEmailRule.php

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+<?php
+
+/**
+ * @package     Joomla.Site
+ * @subpackage  com_contact
+ *
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Contact\Site\Rule;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Form\Form;
+use Joomla\CMS\Form\Rule\EmailRule;
+use Joomla\Registry\Registry;
+use Joomla\String\StringHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * FormRule for com_contact to make sure the email address is not blocked.
+ *
+ * @since  1.6
+ */
+class ContactEmailRule extends EmailRule
+{
+    /**
+     * Method to test for banned email addresses
+     *
+     * @param   \SimpleXMLElement  $element  The SimpleXMLElement object representing the <field /> tag for the form field object.
+     * @param   mixed              $value    The form field value to validate.
+     * @param   string             $group    The field name group control value. This acts as an array container for the field.
+     *                                       For example if the field has name="foo" and the group value is set to "bar" then the
+     *                                       full field name would end up being "bar[foo]".
+     * @param   Registry           $input    An optional Registry object with the entire data set to validate against the entire form.
+     * @param   Form               $form     The form object for which the field is being tested.
+     *
+     * @return  boolean  True if the value is valid, false otherwise.
+     */
+    public function test(\SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+    {
+        if (!parent::test($element, $value, $group, $input, $form)) {
+            return false;
+        }
+
+        $params = ComponentHelper::getParams('com_contact');
+        $banned = $params->get('banned_email');
+
+        if ($banned) {
+            foreach (explode(';', $banned) as $item) {
+                $item = trim($item);
+                if ($item != '' && StringHelper::stristr($value, $item) !== false) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+}