Validator, captcha, form, #16

git-svn-id: svn+ssh://code.netmonsters.ru/svn/majestic/branches/evo@141 4cb57b5f-5bbd-dd11-951b-001d605cbbc5

captcha/Captcha.php

@@ -0,0 +1,79 @@
+<?php
+/**
+ * @copyright NetMonsters <team@netmonsters.ru>
+ * @link http://netmonsters.ru
+ * @package Majestic
+ * @subpackage captcha
+ * @since 2010-04-24
+ * @version SVN: $Id$
+ * @filesource $URL$
+ */
+
+class Captcha
+{
+    
+    protected $font_size = 38;
+    protected $width     = 200;
+    protected $height    = 70;
+
+
+    public function getImage($token)
+    {
+        $font = dirname(__FILE__) . '/poh.ttf';
+        
+        $image = imagecreatetruecolor($this->width, $this->height);
+        // белый фон
+        $background = imagecolorallocate($image, 255, 255, 255);
+        imagefilledrectangle($image, 0, 0, $this->width, $this->height, $background);
+        
+        // основная магия тут
+        if (Session::get('_ctoken') == $token && Session::get('_ccode')) {
+            
+            $code = Session::get('_ccode');
+            
+            $color = imagecolorallocate($image, 81, 81, 81);
+            
+            for ($j = 0; $j < 5; $j++) {
+                imageellipse($image, rand(-$this->width, $this->width * 2), 
+                             rand(-$this->height, $this->height * 2), 
+                             $this->width, $this->width, $color);
+            }
+            
+            $letters = preg_split("//u", strtoupper($code));
+            $length = count($letters);
+            $step = floor($this->width / $length);
+            $i = 2;
+            
+            foreach ($letters as $key => $letter) {
+                imagettftext($image, $this->font_size, 0, 
+                             rand($i + 2, $i + 4), ($this->font_size + $this->height) / 2, 
+                             $color, $font, $letter);
+                $i = $i + $step ;
+            }
+        }
+        
+        ob_start();
+        header("Cache-Control: no-store, no-cache, must-revalidate");
+        header("Content-Type: image/jpg");
+        imagejpeg($image, '', 100);
+        imagedestroy($image);
+        return ob_get_clean();
+    }
+    
+    public function getToken()
+    {
+        $token = md5(microtime() . uniqid());
+        $code = strtoupper(substr(str_ireplace(array('0', 'O'), '', md5(time() . 'captcha' . rand(0, 1000))), 1, 5));
+        Session::set('_ctoken', $token);
+        Session::set('_ccode', $code);
+        return $token;
+    }
+    
+    public function checkCode($token, $code)
+    {
+        if (Session::get('_ctoken') == $token && Session::get('_ccode') == strtoupper($code)){
+            return true;
+        }
+        return false;
+    }
+}

captcha/CaptchaImageAction.php

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+<?php
+/**
+ * @copyright NetMonsters <team@netmonsters.ru>
+ * @link http://netmonsters.ru
+ * @package Majestic
+ * @subpackage captcha
+ * @since 2010-04-24
+ * @version SVN: $Id$
+ * @filesource $URL$
+ */
+
+class CaptchaImageAction
+{
+    
+    public function __construct()
+    {
+        $captcha = new Captcha();
+        echo $captcha->getImage(Env::Get('ctoken'));
+        exit();        
+    }
+}

captcha/CaptchaValidator.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * @copyright NetMonsters <team@netmonsters.ru>
+ * @link http://netmonsters.ru
+ * @package Majestic
+ * @subpackage validator
+ * @since 2010-04-26
+ * @version SVN: $Id$
+ * @filesource $URL$
+ */
+
+class CaptchaValidator extends Validator
+{
+
+    const WRONG_CODE = 'is_empty';
+    
+    protected $templates = array(self::WRONG_CODE => 'Entered code wrong');
+    
+    public function isValid($value, $context = null)
+    {
+        if (!$context || !isset($context['ctoken']) || !isset($context['ccode'])) {
+            $this->error();
+            return false;
+        }
+        $captcha = new Captcha();
+        if ($captcha->checkCode($context['ctoken'], $context['ccode'])) {
+            return true;
+        }
+        $this->error();
+        return false;
+    }
+}