<?php
define('MODX_API_MODE', true);
include_once('../../index.php');
$modx->db->connect();
$modx->getSettings();
$modx->invokeEvent('OnWebPageInit');

$vword = new VeriWord(148,60);
$vword->output_image();
$vword->destroy_image();

#captchaClass.php file below

## v1 Stable ##

######
## Verification Word
######
## This class generate an image with random text
## to be used in form verification. It has visual
## elements design to confuse OCR software preventing
## the use of BOTS.
##
#######
## Author: Huda M Elmatsani
## Email:   justhuda at netrada.co.id
##
## 25/07/2004
#######
## Copyright (c) 2004 Huda M Elmatsani All rights reserved.
## This program is free for any purpose use.
########
##
## USAGE
## create some image with noise texture, put in image directory,
## rename to noise_#, see examples
## put some true type font into font directory,
## rename to font_#, see exmplae
## you can search and put free font you like
##
## see sample.php for test and usage
## sample URL: http://www.program-ruti.org/veriword/
####
class VeriWord {

    /* path to font directory*/
    public $dir_font   = "ttf/";
    /* path to background image directory*/
    public $dir_noise  = "noises/";
    public $word       = "";
    public $im_width   = 0;
    public $im_height  = 0;
    public $im;

    public function __construct($w=200, $h=80) {
        /* create session to set word for verification */
        $this->set_veriword();
        $this->dir_font = dirname(__FILE__) . '/' . $this->dir_font;
        $this->im_width         = $w;
        $this->im_height        = $h;
    }

    public function set_veriword() {
        /* create session variable for verification,
           you may change the session variable name */
        $this->word             = $this->pick_word();
        $_SESSION['veriword']   = $this->word;
    }

    public function output_image() {
        /* output the image as jpeg */
        $this->draw_image();
        header("Content-type: image/jpeg");
        imagejpeg($this->im);
    }

    public function pick_word() {
        $modx = evolutionCMS();
        // set default words
        $words="MODX,Access,Better,BitCode,Chunk,Cache,Desc,Design,Excell,Enjoy,URLs,TechView,Gerald,Griff,Humphrey,Holiday,Intel,Integration,Joystick,Join(),Oscope,Genetic,Light,Likeness,Marit,Maaike,Niche,Netherlands,Ordinance,Oscillo,Parser,Phusion,Query,Question,Regalia,Righteous,Snippet,Sentinel,Template,Thespian,Unity,Enterprise,Verily,Veri,Website,WideWeb,Yap,Yellow,Zebra,Zygote";
        $words = $modx->config['captcha_words'] ? $modx->config['captcha_words'] : $words;
        $arr_words = array_filter(array_map('trim', explode(',', $words)));

        /* pick one randomly for text verification */
        return (string) $arr_words[array_rand($arr_words)].rand(10,999);
    }

    public function draw_text() {
        $dir = dir($this->dir_font);
        $fontstmp = array();
        while (false !== ($file = $dir->read())) {
            if(substr($file, -4) == '.ttf') {
                $fontstmp[] = $this->dir_font.$file;
            }
        }
        $dir->close();
        $text_font = (string) $fontstmp[array_rand($fontstmp)];

        /* angle for text inclination */
        $text_angle = rand(-9,9);
        /* initial text size */
        $text_size  = 30;
        /* calculate text width and height */
        $box        = imagettfbbox ( $text_size, $text_angle, $text_font, $this->word);
        $text_width = $box[2]-$box[0]; //text width
        $text_height= $box[5]-$box[3]; //text height

        /* adjust text size */
        $text_size  = round((20 * $this->im_width)/$text_width);

        /* recalculate text width and height */
        $box        = imagettfbbox ( $text_size, $text_angle, $text_font, $this->word);
        $text_width = $box[2]-$box[0]; //text width
        $text_height= $box[5]-$box[3]; //text height

        /* calculate center position of text */
        $text_x         = ($this->im_width - $text_width)/2;
        $text_y         = ($this->im_height - $text_height)/2;

        /* create canvas for text drawing */
        $im_text        = imagecreate ($this->im_width, $this->im_height);
        $bg_color       = imagecolorallocate ($im_text, 255, 255, 255);

        /* pick color for text */
        $text_color     = imagecolorallocate ($im_text, 0, 51, 153);

        /* draw text into canvas */
        imagettftext    (   $im_text,
            $text_size,
            $text_angle,
            $text_x,
            $text_y,
            $text_color,
            $text_font,
            $this->word);

        /* remove background color */
        imagecolortransparent($im_text, $bg_color);
        return $im_text;
    }


    public function draw_image() {

        /* pick one background image randomly from image directory */
        $img_file       = $this->dir_noise."noise".rand(1,4).".jpg";

        /* create "noise" background image from your image stock*/
        $noise_img      = @imagecreatefromjpeg ($img_file);
        $noise_width    = imagesx($noise_img);
        $noise_height   = imagesy($noise_img);

        /* resize the background image to fit the size of image output */
        $this->im       = imagecreatetruecolor($this->im_width,$this->im_height);
        imagecopyresampled ($this->im,
            $noise_img,
            0, 0, 0, 0,
            $this->im_width,
            $this->im_height,
            $noise_width,
            $noise_height);

        /* put text image into background image */
        imagecopymerge (    $this->im,
            $this->draw_text(),
            0, 0, 0, 0,
            $this->im_width,
            $this->im_height,
            70 );

        return $this->im;
    }

    public function destroy_image() {

        imagedestroy($this->im);

    }

}
