ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
class.ilCaptchaUtil.php
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1<?php
2/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */
3
12{
13 const CONTEXT_FORUM = 'frm';
14 const CONTEXT_LOGIN = 'auth';
15 const CONTEXT_REGISTRATION = 'reg';
16 const CONTEXT_WIKI = 'wiki';
17
21 protected static $context_map;
22
27 public static function checkFreetype()
28 {
29 if(function_exists('imageftbbox'))
30 {
31 return true;
32 }
33 return false;
34 }
35
42 public static function __callStatic($name, array $arguments = array())
43 {
44 if(
45 strpos($name, 'isActiveFor') === 0 ||
46 strpos($name, 'setActiveFor') === 0
47 )
48 {
49 $settings = new ilSetting('cptch');
50 $supported_contexts = self::getSupportedContexts();
51 $method_parts = explode('_', strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $name)));
52 $requested_context = strtolower($method_parts[count($method_parts) - 1]);
53 if(!isset($requested_context, self::$context_map))
54 {
55 throw new BadMethodCallException('Method ' . $name . ' called for a non existing context.');
56 }
57
58 if('set' == $method_parts[0])
59 {
60 $settings->set('activate_captcha_anonym_' . $supported_contexts[$requested_context], (int)$arguments[0]);
61 return;
62 }
63 else
64 {
65 return self::checkFreetype() && (bool)$settings->get('activate_captcha_anonym_' . $supported_contexts[$requested_context], false);
66 }
67 }
68 else
69 {
70 throw new BadMethodCallException('Call to an undefined static method ' . $name . ' in class ' . __CLASS__ . '.');
71 }
72 }
73
77 public static function getPreconditionsMessage()
78 {
82 global $lng;
83
84 $lng->loadLanguageModule('cptch');
85 return "<a target='_blank' href='http://php.net/manual/en/image.installation.php'>" . $lng->txt('cptch_freetype_support_needed') . "</a>";
86 }
87
91 private static function getSupportedContexts()
92 {
93 if(null !== self::$context_map)
94 {
95 return self::$context_map;
96 }
97
98 self::$context_map = array();
99
100 $r = new ReflectionClass(new self());
101 $constants = $r->getConstants();
102 foreach($constants as $name => $value)
103 {
104 if(strpos($name, 'CONTEXT_') === 0)
105 {
106 self::$context_map[strtolower(substr($name, strlen('CONTEXT_')))] = $value;
107 }
108 }
109
110 return self::$context_map;
111 }
112}
static getSupportedContexts()
static checkFreetype()
Check whether captcha support is active.
static __callStatic($name, array $arguments=array())
ILIAS Setting Class.
$r
Definition: example_031.php:79
global $lng
Definition: privfeed.php:40