moved CAPTCHA plugin to a helper

1 files changed, 246 insertions, 0 deletions

diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
new file mode 100644
index 000000000..a58789219
--- /dev/null
+++ b/system/helpers/captcha_helper.php
@@ -0,0 +1,246 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter CAPTCHA Helper
+ *
+ * @package		CodeIgniter
+ * @subpackage	Helpers
+ * @category	Helpers
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/helpers/xml_helper.html
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Create CAPTCHA
+ *
+ * @access	public
+ * @param	array	array of data for the CAPTCHA
+ * @param	string	path to create the image in
+ * @param	string	URL to the CAPTCHA image folder
+ * @param	string	server path to font
+ * @return	string
+ */
+if ( ! function_exists('create_captcha'))
+{
+	function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '')
+	{		
+		$defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200);		
+	
+		foreach ($defaults as $key => $val)
+		{
+			if ( ! is_array($data))
+			{
+				if ( ! isset($$key) OR $$key == '')
+				{
+					$$key = $val;
+				}
+			}
+			else
+			{			
+				$$key = ( ! isset($data[$key])) ? $val : $data[$key];
+			}
+		}
+	
+		if ($img_path == '' OR $img_url == '')
+		{
+			return FALSE;
+		}
+
+		if ( ! @is_dir($img_path))
+		{
+			return FALSE;
+		}
+	
+		if ( ! is_writable($img_path))
+		{
+			return FALSE;
+		}
+			
+		if ( ! extension_loaded('gd'))
+		{
+			return FALSE;
+		}		
+	
+		// -----------------------------------
+		// Remove old images	
+		// -----------------------------------
+			
+		list($usec, $sec) = explode(" ", microtime());
+		$now = ((float)$usec + (float)$sec);
+			
+		$current_dir = @opendir($img_path);
+	
+		while($filename = @readdir($current_dir))
+		{
+			if ($filename != "." and $filename != ".." and $filename != "index.html")
+			{
+				$name = str_replace(".jpg", "", $filename);
+		
+				if (($name + $expiration) < $now)
+				{
+					@unlink($img_path.$filename);
+				}
+			}
+		}
+	
+		@closedir($current_dir);
+
+		// -----------------------------------
+		// Do we have a "word" yet?
+		// -----------------------------------
+	
+	   if ($word == '')
+	   {
+			$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+			$str = '';
+			for ($i = 0; $i < 8; $i++)
+			{
+				$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
+			}
+		
+			$word = $str;
+	   }
+	
+		// -----------------------------------
+		// Determine angle and position	
+		// -----------------------------------
+	
+		$length	= strlen($word);
+		$angle	= ($length >= 6) ? rand(-($length-6), ($length-6)) : 0;
+		$x_axis	= rand(6, (360/$length)-16);			
+		$y_axis = ($angle >= 0 ) ? rand($img_height, $img_width) : rand(6, $img_height);
+	
+		// -----------------------------------
+		// Create image
+		// -----------------------------------
+	
+		// PHP.net recommends imagecreatetruecolor(), but it isn't always available
+		if (function_exists('imagecreatetruecolor'))
+		{
+			$im = imagecreatetruecolor($img_width, $img_height);
+		}
+		else
+		{
+			$im = imagecreate($img_width, $img_height);
+		}
+			
+		// -----------------------------------
+		//  Assign colors
+		// -----------------------------------
+	
+		$bg_color		= imagecolorallocate ($im, 255, 255, 255);
+		$border_color	= imagecolorallocate ($im, 153, 102, 102);
+		$text_color		= imagecolorallocate ($im, 204, 153, 153);
+		$grid_color		= imagecolorallocate($im, 255, 182, 182);
+		$shadow_color	= imagecolorallocate($im, 255, 240, 240);
+
+		// -----------------------------------
+		//  Create the rectangle
+		// -----------------------------------
+	
+		ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color);
+	
+		// -----------------------------------
+		//  Create the spiral pattern
+		// -----------------------------------
+	
+		$theta		= 1;
+		$thetac		= 7;
+		$radius		= 16;
+		$circles	= 20;
+		$points		= 32;
+
+		for ($i = 0; $i < ($circles * $points) - 1; $i++)
+		{
+			$theta = $theta + $thetac;
+			$rad = $radius * ($i / $points );
+			$x = ($rad * cos($theta)) + $x_axis;
+			$y = ($rad * sin($theta)) + $y_axis;
+			$theta = $theta + $thetac;
+			$rad1 = $radius * (($i + 1) / $points);
+			$x1 = ($rad1 * cos($theta)) + $x_axis;
+			$y1 = ($rad1 * sin($theta )) + $y_axis;
+			imageline($im, $x, $y, $x1, $y1, $grid_color);
+			$theta = $theta - $thetac;
+		}
+
+		// -----------------------------------
+		//  Write the text
+		// -----------------------------------
+	
+		$use_font = ($font_path != '' AND file_exists($font_path) AND function_exists('imagettftext')) ? TRUE : FALSE;
+		
+		if ($use_font == FALSE)
+		{
+			$font_size = 5;
+			$x = rand(0, $img_width/($length/3));
+			$y = 0;
+		}
+		else
+		{
+			$font_size	= 16;
+			$x = rand(0, $img_width/($length/1.5));
+			$y = $font_size+2;
+		}
+
+		for ($i = 0; $i < strlen($word); $i++)
+		{
+			if ($use_font == FALSE)
+			{
+				$y = rand(0 , $img_height/2);
+				imagestring($im, $font_size, $x, $y, substr($word, $i, 1), $text_color);
+				$x += ($font_size*2);
+			}
+			else
+			{		
+				$y = rand($img_height/2, $img_height-3);
+				imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, substr($word, $i, 1));
+				$x += $font_size;
+			}
+		}
+	
+
+		// -----------------------------------
+		//  Create the border
+		// -----------------------------------
+
+		imagerectangle($im, 0, 0, $img_width-1, $img_height-1, $border_color);		
+
+		// -----------------------------------
+		//  Generate the image
+		// -----------------------------------
+	
+		$img_name = $now.'.jpg';
+
+		ImageJPEG($im, $img_path.$img_name);
+	
+		$img = "<img src=\"$img_url$img_name\" width=\"$img_width\" height=\"$img_height\" style=\"border:0;\" alt=\" \" />";
+	
+		ImageDestroy($im);
+		
+		return array('word' => $word, 'time' => $now, 'image' => $img);
+	}
+}
+
+// ------------------------------------------------------------------------
+
+/* End of file captcha_pi.php */
+/* Location: ./system/plugins/captcha_pi.php */
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