Browse Source

1st version of the mathcaptcha addon

master
Tobias Diekershoff 2 years ago
parent
commit
0b5080eaa1
1 changed files with 107 additions and 0 deletions
  1. +107
    -0
      mathcaptcha.php

+ 107
- 0
mathcaptcha.php View File

@ -0,0 +1,107 @@
<?php
/**
* Name: Math-Captcha
* Description: This addon adds a smal calculation, which needs to be solved correctly before a new registration can be done
* Version: 0.1
* Author: Tobias Diekershoff <tobias@social.diekershoff.de>
* License: MIT style
**/
use Friendica\App;
use Friendica\Core\Hook;
use Friendica\Core\L10n;
use Friendica\Core\Renderer;
use Friendica\Core\System;
function mathcaptcha_install()
{
Hook::register('register_form', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_register_form');
Hook::register('register_post', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_register_post');
Hook::register('template_vars', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_template_vars');
}
function mathcaptcha_uninstall()
{
Hook::unregister('register_form', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_register_form');
Hook::unregister('register_post', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_register_post');
Hook::unregister('template_vars', 'addon/mathcaptcha/mathcaptcha.php', 'mathcaptcha_template_vars');
}
/**
* Check if the captcha was solved correctly when posting the registration form
*/
function mathcaptcha_register_post(App $a, &$b)
{
$solution = 0;
switch ($_SESSION['mathcaptcha_op']){
case 0:
$solution = $_SESSION['mathcaptcha_n1'] + $_SESSION['mathcaptcha_n2'];
break;
case 1:
$solution = $_SESSION['mathcaptcha_n1'] - $_SESSION['mathcaptcha_n2'];
break;
case 2:
$solution = $_SESSION['mathcaptcha_n1'] * $_SESSION['mathcaptcha_n2'];
break;
}
unset($_SESSION['mathcaptcha_n1']);
unset($_SESSION['mathcaptcha_n2']);
unset($_SESSION['mathcaptcha_op']);
$post = $b['post'];
if ($solution == $post['mathcaptcha']) {
return true;
} else {
notice(L10n::t('The solution for the captcha was incorrect'));
$a->internalRedirect('/register');
}
}
/**
* Add the captcha to the register form
*/
function mathcaptcha_register_form(App $a, &$b)
{
$tpl = $b['template'];
$oldPath = $tpl->filename;
$newPath = 'addon/mathcaptcha/templates/register.tpl';
if (strpos($oldPath, 'theme') == true)
{
$theme = explode('/', $oldPath)[2];
$newThemePath = 'addon/mathcaptcha/templates/theme/'.$theme.'/register.tpl';
if (file_exists($newThemePath)) {
$newPath = $newThemePath;
}
}
if (file_exists($newPath)) {
$b['template'] = Renderer::getMarkupTemplate($newPath);
$b['template']->filename = $newPath;
}
}
/**
* add template variables to the registration template
*/
function mathcaptcha_template_vars(App $a, &$arr)
{
// if the template currently processed is the register.tpl
// add some new variables to the list of template variables
if ($arr['template']=='register.tpl')
{
unset($_SESSION['mathcaptcha_n1']);
unset($_SESSION['mathcaptcha_n2']);
unset($_SESSION['mathcaptcha_op']);
$num1 = rand(1, 10);
$num2 = rand(1, 10);
$operator = rand(0, 2);
$_SESSION['mathcaptcha_n1'] = $num1;
$_SESSION['mathcaptcha_n2'] = $num2;
$_SESSION['mathcaptcha_op'] = $operator;
$ops = ['+','-','&times'];
$task = strval($num1)." ".$ops[$operator]." ".strval($num2);
$arr['vars'] = array_merge($arr['vars'], [
'$captchaTitle'=>L10n::t('Captcha'),
'$captchaDescription'=>L10n::t('In order to continue with the registration, please solve the following calculation.'),
'$mathcaptcha'=> ['mathcaptcha', $task, '', L10n::t('You have to type in the solution of the calculation'), 'required']
]);
}
}

Loading…
Cancel
Save