File sapphire/security/LoginForm.php

 1 <?php
 2 /**
 3  * Abstract base class for a login form
 4  *
 5  * This class is used as a base class for the different log-in forms like
 6  * {@link MemberLoginForm} or {@link OpenIDLoginForm}.
 7  *
 8  * @author Markus Lanthaler <markus@silverstripe.com>
 9  * @package sapphire
10  * @subpackage security
11  */
12 abstract class LoginForm extends Form {
13     function __construct($controller, $name, $fields, $actions) {
14         parent::__construct($controller, $name, $fields, $actions);
15         
16         $this->disableSecurityToken();  
17     }
18 
19     /**
20      * Authenticator class to use with this login form
21      * 
22      * Set this variable to the authenticator class to use with this login
23      * form.
24      * @var string
25      */
26     
27     protected $authenticator_class;
28 
29     /**
30      * Get the authenticator class
31      * @return Authenticator Returns the authenticator class for this login form.
32      */
33     
34     public function getAuthenticator() {
35         if(!class_exists($this->authenticator_class) || !is_subclass_of($this->authenticator_class, 'Authenticator')) {
36             user_error("The form uses an invalid authenticator class! '{$this->authenticator_class}' is not a subclass of 'Authenticator'", E_USER_ERROR);
37             return;
38         }
39         
40         return new $this->authenticator_class;
41     }
42 }
43 
44 ?>

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