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wp-content/plugins/mailpoet/lib/Services/Validator.php

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+<?php declare(strict_types = 1);
+
+namespace MailPoet\Services;
+
+if (!defined('ABSPATH')) exit;
+
+
+use MailPoet\WP\Functions as WPFunctions;
+
+/**
+ * This class contains validation methods that were extracted from the \MailPoet\Models\ModelValidator class.
+ * It is used only in a few places and there is a chance in the future we can remove it.
+ */
+class Validator {
+  const EMAIL_MIN_LENGTH = 6;
+  const EMAIL_MAX_LENGTH = 150;
+  const ROLE_EMAILS = [
+    'abuse',
+    'compliance',
+    'devnull',
+    'dns',
+    'ftp',
+    'hostmaster',
+    'inoc',
+    'ispfeedback',
+    'ispsupport',
+    'list-request',
+    'list',
+    'maildaemon',
+    'noc',
+    'no-reply',
+    'noreply',
+    'nospam',
+    'null',
+    'phish',
+    'phishing',
+    'postmaster',
+    'privacy',
+    'registrar',
+    'root',
+    'security',
+    'spam',
+    'sysadmin',
+    'undisclosed-recipients',
+    'unsubscribe',
+    'usenet',
+    'uucp',
+    'webmaster',
+    'www',
+  ];
+
+  public function validateEmail($email): bool {
+    $permittedLength = (strlen($email) >= self::EMAIL_MIN_LENGTH && strlen($email) <= self::EMAIL_MAX_LENGTH);
+    $validEmail = WPFunctions::get()->isEmail($email) !== false && filter_var($email, FILTER_VALIDATE_EMAIL) !== false;
+    return ($permittedLength && $validEmail);
+  }
+
+  public function validateNonRoleEmail($email): bool {
+    if (!$this->validateEmail($email)) return false;
+    $firstPart = strtolower(substr($email, 0, (int)strpos($email, '@')));
+    return array_search($firstPart, self::ROLE_EMAILS) === false;
+  }
+}