<?php
/**
 *	RotateAntispam - antispamamova ochrana pomocou rotovania obrazku
 *
 *	tato trieda sluzi na:
 *	- ochranu formulara pred vyplnanim robotmi
 *
 *	Autor:		Igor Mino, igor@platon.sk
 *	Autor napadu:	Daniel Ivanis, daniel.ivanis@gmail.com
 *
 *				Copyright (c) 2012 Platon Technologies, s.r.o., http://platon.sk/
 *				All rights reserved.
 *
 *	verzia:		1.00, 2011-02-22 17:16
 *				1.01, 2012-03-26 17:22  Igor
 *				1.02, 2012-05-11 10:51  Igor
 *				1.03, 2012-10-02 10:20  Igor
 *				1.04, 2013-02-27 09:56  Igor
 *				1.05, 2013-08-05 16:43  Igor
 *				1.06, 2013-10-07 15:50  Igor
 *				1.07, 2015-10-21 12:40  Igor - fix pozicie siveho screenu
 *
 */

class RotateAntispam {
	// ====[ Definovanie premennych ]==========================================

	/**
	 *	definovane premenne pre beh RotateAntispam - SUKROMNE
	 */

	// chybova sprava
	// znakova hodnota
	protected $errorMessage = '';

	// ukladanie roznych poznamok pocas vykonavania, pomoze pri debugovani
	// znakova hodnota
	protected $log = '';

	// ak nastala chyba, koly ktorej nie je mozne pokracovat, tak TRUE
	// logicka hodnota
	protected $isError = false;

	// ak je nastaveny debug mod, tak pri chybe nenastane DIE() - aby bolo mozne vypisat logy
	protected $debug = false;
	
	// obrazok, ktory sa pouzije pre narotovanie
	protected $image = '';
	
	// nazov polozky s odpovedou
	protected $answer_name = '';
	
	// ID tlacitka, ktorym sa odosiela formualr
	protected $submit_name = null;
	
	// URL k triede RotateAntispam
	protected $urlRotateAntispam = '';
	
	// vysledok kontroly odpovede
	protected $correctAnswer_cache = null;
	
	// vystupne kodovanie
	protected $outputEncoding = 'UTF-8';
	
	// texty
	protected $texts = array(
		'title' => 'Antispam',
		'description' => 'Otočte obrázok do vodorovnej polohy.',
		'submit' => 'Odoslať',
		'cancel' => 'Zrušiť'
	);
	
	// informacie o obrazku
	protected $imageInfo = array(
		'width' => null,
		'height' => null,
		'type' => null,
		'mime' => null
	);
	
	// konfiguracia vzhladu
	protected $design = array(
		// Left Button
		'leftButtonColor' => '#000',
		'leftButtonColorHover' => '#fc0',
		'leftButtonBorderColor' => '#ccc',
		'leftButtonImage' => '',
		'leftButtonImageHover' => '',
		// Right Button
		'rightButtonColor' => '#000',
		'rightButtonColorHover' => '#fc0',
		'rightButtonBorderColor' => '#ccc',
		'rightButtonImage' => '',
		'rightButtonImageHover' => '',
	);
	
	// ====[ Konstruktor ]=====================================================
	
	/**
	 *  konstruktor, nastavenie behu RotateAntispam
	 *
	 *  @param  array	$opts		- nastavenie jednotlivych hodnot pre beh RotatoAntispam
	 *  @param  array	$opts['debug']			- nastavenie DEBUG modu
	 *  @param  array	$opts['image']			- nastavenie defaultneho obrazka
	 *  @return void
	 */
	public function __construct($opts = array()) {
		$this->addLog('Spusteny konstruktor');

		if (isset($opts['debug'])
			&& is_bool($opts['debug']))
		{
			$this->debug = $opts['debug'];
			$this->addLog('Debug nastaveny na hodnotu ' . (($this->debug) ? 'TRUE' : 'FALSE'));
		} else {
			$this->debug = false;
			$this->addLog('Debug bol nastaveny na default hodnotu FALSE');
		}
		
		if (isset($opts['image'])
			&& is_string($opts['image']))
		{
			if ($this->setImage($opts['image'])) {
				$this->addLog('Obrazok pre rotovanie bol nastaveny');
			} else {
               	$this->setError('Chyba pri nastavovani obrazku');
			}
		} else {
			$this->setError('Nebol nastaveny obrazok pre rotovanie');
		}
		
		if (isset($opts['answer_name'])
			&& is_string($opts['answer_name']))
		{
			$this->answer_name = $opts['answer_name'];
		} else {
			$this->answer_name = 'answer_name_'.Time();
		}
		$this->addLog('Nazov polozky odpovede bol nastaveny na hodnotu "'.$this->answer_name.'"');
		
		if (isset($opts['submit_name'])
			&& is_string($opts['submit_name']))
		{
			$this->submit_name = $opts['submit_name'];
			$this->addLog('Nazov tlacitka pre odosielanie formulara bol nastaveny');
		} else {
			$this->addLog('Nazov tlacitka pre odosielanie formulara NEBOL nastaveny');
		}

		if (isset($opts['url'])
			&& is_string($opts['url']))
		{
			if ($this->setUrlRotateAntispam($opts['url'])) {
				$this->addLog('URL pre RotateAntispam bola nastavena');
			} else {
				$this->addLog('URL pre RotateAntispam NEBOLA nastavena');
			}
		} else {
			$this->setError('URL pre RotateAntispam NEBOLA zadana');
		}
		
		if (isset($opts['encoding'])
			&& is_string($opts['encoding']))
		{
			if ($this->setOutputEncoding($opts['encoding'])) {
				$this->addLog('Vystupne kodovanie bolo nastavene na hodnotu '.$this->outputEncoding);
			} else {
				$this->addLog('Vystupne kodovanie NEBOLO nastavene na hodnotu '.$opts['encoding']);
			}
		}
	}
	
	// ====[ Metody pre zaznamenanie chyb a logov ]============================
	/**
	 *  nastavi chybovu spravu, ktoru je v mozne vyziadat pomoocu getErrorMessage()
	 *
	 *  @param  string  $msg			- chybova sprava
	 */
	protected function setErrorMessage($msg) {
		$msg = 'Error: "'.$msg.'"';
		$this->addLog($msg);
		$this->errorMessage = $msg;
	}

	/**
	 *  nastavi chybovu spravu a priznak chyby
	 *
	 *  @param  string  $msg			- chybova sprava
	 */
	protected function setError($msg) {
		$this->setErrorMessage($msg);
		$this->isError = true;
		if (!$this->debug) {
			$message = 'Error: Nastala chyba pri behu RotateAntispam. Nasleduju zaznamenavane poznamky pocas behu objektu RotateAntispam:'."\n"
					.'Umiestnenie RotateAntispam: '.$_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF']."\n"
					."\n"
					.str_replace("<br>", "\n", $this->getLog())
					."\n"
					."Koniec spravy.";
			die($msg);
		}
	}

	/**
	 *  vrati ci nastala chyba
	 *
	 *  @return bool				- ak nastala chyba vrati TRUE, inak FALSE
	 */
	public function isError() {
		return $this->isError;
	}

	/**
	 *  varati poslednu chybovu spravu
	 *
	 *  @return string				- posledna chybova sprava
	 */
	public function getErrorMessage() {
		return $this->errorMessage;
	}

	/**
	 *  prida poznamku pre neskorsi debug
	 *
	 *  @param  string $msg			- poznamka
	 */
	protected function addLog($msg) {
		if ($this->debug) {
			$init_log = '--[ RotateAntispam ]----------------------------------------------------';
			if (strpos($this->getLog(), $init_log) === false) {
				echo '<script type="text/javascript">console.log("'.$init_log.'");</script>';
				$this->log .= $init_log.'<br>';
			}
			$msg = str_replace("\n", '', $msg);
			$msg = str_replace("\r", '', $msg);
			echo '<script type="text/javascript">console.log("'.addslashes($msg).'");</script>';
		}
		$this->log .= $msg.'<br>';
	}

	/**
	 *  vrati vsetky poznamku
	 *
	 *  @return string				- poznamky, ktore boli zaznamenane pocas behu
	 */
	public function getLog() {
		return $this->log;
	}

	// ====[ Sukromne metody ]=================================================

     /**
	 *  stavi URL adresu triedy
	 *
	 *  @param $url				- URL adresa k triede RotateAntispam
	 *  @return bool				- uspesnost nastavenia
	 */
	protected function setUrlRotateAntispam($url) {
		// TODO: spravit nejake osetrenie URL
		$this->urlRotateAntispam = $url;
		return true;
	}
	
	/**
	 *  vrati URL adresu triedy
	 *
	 *  @return string				- URL adresa triedy
	 */
	protected function getUrlRotateAntispam() {
		return $this->urlRotateAntispam;
	}
	
	/**
	 *  vrati ziadany text
	 *
	 *  @param string $key			- kluc retazca
	 *  @return string				- hodnota prisluchajuca klucu
	 */
	protected function getText($key) {
		$ret = $this->texts[$key];
		return ($this->outputEncoding == 'UTF-8')
			? $ret
			: iconv('UTF-8', $this->outputEncoding, $ret);
	}

	/**
	 *  vrati dizajn jedneho elementu
	 *
	 *  @param string $key			- kluc elementu
	 *  @return string				- hodnota ziadaneho elementu
	 */
	protected function getDesignElement($key) {
		if (strlen($key) <= 0
			|| !isset($this->design[$key]))
		{
			return false;
		}
		return $this->design[$key];
	}

	/**
	 *  vrati informacie o obrazku
	 *
	 *  @param string $image		- subor obrazka
	 *  @return array				- pole s informacia o obrazku
	 */
	protected function getImageInfo($image) {
		if (strlen($image) <= 0) {
			return false;
		}
		$img = getimagesize($image);
		return array(
			'width'    => $img[0],
			'height'   => $img[1],
			'type'     => $img[2],
			'mime'     => $img['mime']
		);
	}

	/**
	 *  nastavi typ vystupneho kodovania
	 *
	 *  @param string $encoding		- nazov kodovania
	 *  @return bool				- uspech nastavenia
	 */
	protected function setOutputEncoding($encoding) {
		$allowEncoding = array('UTF-8', 'CP1250', 'ISO-8859-1', 'ISO-8859-2', 'WINDOWS-1250');
		$encoding = strtoupper($encoding);
		if (in_array($encoding, $allowEncoding)) {
			$this->outputEncoding = $encoding.'//TRANSLIT';
			return true;
		}
		return false;
	}

	// ====[ Verejne metody ]==================================================

	/**
	 *  nastavi obrazok pre rotovanie
	 *
	 *  @param  string	$image		- subor s obrazkom
	 *  @return bool				- uspesnot nastavenia
	 */
	public function setImage($image) {
		$this->addLog('Spusteny setImage');
		$this->addLog('Vypis $_SESSION: '.json_encode($_SESSION));
		if (!isset($image)
			|| !is_string($image)
			|| !(strlen($image) > 0))
		{
			$this->setError('Obrazok \''.$image.'\' nebol nastaveny');
			return false;
		}
		if (!file_exists($image)) {
			$this->setError('Zadany obrazok \''.$image.'\' neexistuje');
			return false;
		}
		$this->image = $image;
		$relative_path = str_replace(dirname(__FILE__), '', realpath($image));
		if (substr($relative_path, 0, 1) == '/'
			|| substr($relative_path, 0, 1) == '\\')
		{
			$relative_path = substr($relative_path, 1);
		}
		$_SESSION['RotateAntispam']['image'] = $relative_path;
		
  		$this->imageInfo = $this->getImageInfo($this->image);
		
		$this->addLog('Obrazok "'.$image.'" bol nastaveny');
		return true;
	}
	
	/**
	 *  vrati HTML antispam ochrany
	 *
	 *  @return string				- HTML kod pre antispam ochrany
	 */
	public function getAntispamHtml() {
		$this->addLog('Spusteny getAntispamHtml');
		$shift = rand(-10, 10);
		$_SESSION['RotateAntispam']['shift'] = $shift;
		$this->addLog('Shift nastaveny na hodnotu "'.$shift.'"');
		$html = '
			<style type="text/css">
				.antispam-hide { display: none; }
				.antispam-box-hide { display: none; }
				.antispam-box {
					width: '.($this->imageInfo['width'] + 200).'px;
					height: '.($this->imageInfo['height'] + 130).'px;
					background: #FFFFFF;
					color: #000000;
					text-align: center;
					position: absolute;
					margin-left: -'.(($this->imageInfo['width'] + 200) / 2).'px;
					margin-top: 50px;
					left: 50%;
					top: 50%;
					z-index: 20;
					display: block;
					padding: 20px;
					box-shadow: 10px 10px 5px #333;
					-webkit-box-shadow: 10px 10px 5px #333;
					-moz-box-shadow: 10px 10px 5px #333;
					border-radius: 20px;
					-webkit-border-radius: 20px;
					-moz-border-radius: 20px;
					text-align: left;
					background-color: #FFFFFF;
				}
				.antispam-box .antispam-box-title { color: #000000; font-size: 20px; }
				.screen { position: fixed;	left: 0; top: 0; background: #000; }
			</style>
			<div id="screen" class="screen"></div>
			<div id="antispam-box" class="antispam-box-hide">
				<center>
				<span class="antispam-box-title">'.$this->getText('title').'</span>
				<div id="rotimg">
					<img id="rotateantispamimage" src="'.$this->getUrlRotateAntispam().'?getImage" />
					';
		$leftButtonImage = (strlen($this->getDesignElement('leftButtonImage')) > 0
							&& strlen($this->getDesignElement('leftButtonImageHover')) > 0);
		if ($leftButtonImage) {
			$html .= '<img id="rotateantispamimage_leftButton" src="'.$this->getDesignElement('leftButtonImage').'" />';
			$html .= '<img id="rotateantispamimage_leftButtonHover" src="'.$this->getDesignElement('leftButtonImageHover').'" />';
			$leftButtonImageInfo = $this->getImageInfo($this->getDesignElement('leftButtonImage'));

		}
		$rightButtonImage = (strlen($this->getDesignElement('rightButtonImage')) > 0
							&& strlen($this->getDesignElement('rightButtonImageHover')) > 0);
		if ($rightButtonImage) {
			$html .= '<img id="rotateantispamimage_rightButton" src="'.$this->getDesignElement('rightButtonImage').'" />';
			$html .= '<img id="rotateantispamimage_rightButtonHover" src="'.$this->getDesignElement('rightButtonImageHover').'" />';
			$rightButtonImageInfo = $this->getImageInfo($this->getDesignElement('rightButtonImage'));
		}
		$submitType = (strlen($this->getText('submit')) <= 0) ? 'image' : 'submit';
		$cancelType = (strlen($this->getText('cancel')) <= 0) ? 'image' : 'button';
		$html .= '
				</div>
				'.$this->getText('description').'<br>
				<input type="'.$submitType.'" value="'.$this->getText('submit').'" id="rotate_antispam_submit_button">
				<input type="'.$cancelType.'" value="'.$this->getText('cancel').'" id="rotate_antispam_cancel_button" onclick="antispam_box_hide(); return false;">
				</center>
			</div>
			<input type="hidden" name="'.$this->answer_name.'" id="ezin_antispam" value="'.$shift.'">
			<input type="hidden" name="antispam_log" id="antispam_log" value="">
			<script type="text/javascript">
				if (typeof RotateAntispam == "undefined") window.RotateAntispam = {};
				var _beforeBox = null;
				RotateAntispam.beforeBox = function(fnc) {
					_beforeBox = fnc;
				}
				var button_submit;
				var IE;
				var MSIE_ver;
				function initRotateAntispam() {
					var button_submit = document.getElementsByName("'.$this->submit_name.'")[0];
					if (button_submit == null) {
						console.error("Not exists submit button with name '.$this->submit_name.'");
						return false;
					}
					var fnc = button_submit.getAttribute("onclick");
					//var IE = document.all ? true : false;
					IE = (navigator.appName == "Microsoft Internet Explorer");
					//var version = navigator.appVersion.substr(0,3);
					var MSIE_pos = navigator.appVersion.search("MSIE");
					MSIE_ver = parseFloat(navigator.appVersion.substr(MSIE_pos+4, 5));
					if(IE && MSIE_ver < 10) { // fixnute pre IE7 a menej; 2013-07-16 zmenene na IE9 a starsie
						var ret = button_submit.setAttribute("onclick", function(){ antispam_box(); return false; });
					} else { // if onclick is a function, use the IE7 method and call onclick() in the anonymous function
						var ret = button_submit.setAttribute("onclick","antispam_box(); return false;"); // for FF,Opera,Chrome
					}
					//console.info(button_submit.getAttribute("onclick").toString().toString());
					button_submit.setAttribute("name","submit");
					// hide old input
					var old_inputs = document.getElementsByName("ezin_antispam");
					var old_input = null;
					var i = 0;
					if (old_inputs != null) {
						for (i = 0; i < old_inputs.length; i++) {
							old_input = old_inputs[i];
							if (IE) {
								old_input.className = "antispam-hide";
							} else {
								old_input.setAttribute("class","antispam-hide");
							}
						}
					}
					button_submit.disabled = "";
					document.getElementById("rotate_antispam_submit_button").setAttribute("name","'.$this->submit_name.'");
				}
				window.onload = initRotateAntispam;
				function getPageSize() {
					var xScroll, yScroll;
					if (window.innerHeight && window.scrollMaxY) {
						xScroll = window.innerWidth + window.scrollMaxX;
						yScroll = window.innerHeight + window.scrollMaxY;
					} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
						xScroll = document.body.scrollWidth;
						yScroll = document.body.scrollHeight;
					} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
						xScroll = document.body.offsetWidth;
						yScroll = document.body.offsetHeight;
					}
					var windowWidth, windowHeight;
					if (self.innerHeight) {	// all except Explorer
						if(document.documentElement.clientWidth){
							windowWidth = document.documentElement.clientWidth;
						} else {
							windowWidth = self.innerWidth;
						}
						windowHeight = self.innerHeight;
					} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
						windowWidth = document.documentElement.clientWidth;
						windowHeight = document.documentElement.clientHeight;
					} else if (document.body) { // other Explorers
						windowWidth = document.body.clientWidth;
						windowHeight = document.body.clientHeight;
					}
					// for small pages with total height less then height of the viewport
					if(yScroll < windowHeight){
						pageHeight = windowHeight;
					} else {
						pageHeight = yScroll;
					}
					// for small pages with total width less then width of the viewport
					if(xScroll < windowWidth){
						pageWidth = xScroll;
					} else {
						pageWidth = windowWidth;
					}
					arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
					return arrayPageSize;
				};
				function getPageScroll() {
					var xScroll, yScroll;
					if (self.pageYOffset) {
						yScroll = self.pageYOffset;
						xScroll = self.pageXOffset;
					} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
						yScroll = document.documentElement.scrollTop;
						xScroll = document.documentElement.scrollLeft;
					} else if (document.body) {// all other Explorers
						yScroll = document.body.scrollTop;
						xScroll = document.body.scrollLeft;
					}
					arrayPageScroll = new Array(xScroll,yScroll);
					return arrayPageScroll;
				};
				function antispam_box(){
					if (!triggerBeforeBox()) {
						return false;
					}
					var pageSize = getPageSize();
					var pageScroll = getPageScroll();
					var myWidth = pageSize[0];
					var myHeight = pageSize[1];
					var paddingTop = pageScroll[1];
					var windowHeight = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight;
					var screen = document.getElementById("screen");
					screen.style.display = "block";
					screen.style.opacity = "0.7";
					screen.style.width = myWidth+"px";
					screen.style.height = myHeight+"px";
					var antispam_box = document.getElementById("antispam-box");
					antispam_box.className = "antispam-box";
					antispam_box.style.top = paddingTop+"px";
				}
				function antispam_box_hide(){
					var screen = document.getElementById("screen");
					screen.style.display = "none";
					var antispam_box = document.getElementById("antispam-box");
					antispam_box.className = "antispam-box-hide";
				}
				function antispam_log(val) {
					console.log(val);
					document.getElementById("antispam_log").value += val+"\n";
				}
				function triggerBeforeBox() {
					if (_beforeBox != null) {
						return _beforeBox();
					}
					return true;
				}
				var src = document.getElementById("rotateantispamimage").src;
				';
		if ($leftButtonImage) {
			$html .= 'var src_leftButton = document.getElementById("rotateantispamimage_leftButton").src;';
			$html .= 'var src_leftButtonHover = document.getElementById("rotateantispamimage_leftButtonHover").src;';
		}
		if ($rightButtonImage) {
			$html .= 'var src_rightButton = document.getElementById("rotateantispamimage_rightButton").src;';
			$html .= 'var src_rightButtonHover = document.getElementById("rotateantispamimage_rightButtonHover").src;';
		}
		$html .= '
				var angle = '.$shift.';
				document.getElementById("rotimg").innerHTML = "";
				var R = Raphael("rotimg", '.($this->imageInfo['width'] + 100).', '.($this->imageInfo['height'] + 50).');
				R.circle('.(($this->imageInfo['width'] + 100) / 2).', '.(($this->imageInfo['height'] + 50) / 2).', '.(($this->imageInfo['width'] /2 ) + 5).').attr({fill: "#CCC", "stroke-width": 5});
				var img = R.image(src, 50, 25, '.$this->imageInfo['width'].', '.$this->imageInfo['height'].');
				var butt1 = R.set(),
				    butt2 = R.set();
				';
		if ($leftButtonImage) {
			$html .= '
				butt1.push(R.image(src_leftButton, 0, 0, '.$leftButtonImageInfo['width'].', '.$leftButtonImageInfo['height'].'));
				butt1.translate(10, 20);
				butt1.click(function () {                                       //antispam_log("klik DOLAVA");
				    angle -= 10;                                                //antispam_log("angle "+angle.toString());
				    img.stop().animate({transform: "r" + angle}, 1000, "<>");
				    document.getElementById("ezin_antispam").value = angle;     //antispam_log("-------------------------");
				}).mouseover(function () {
					if(IE && MSIE_ver < 9) {
						butt1[0].node.href.baseVal = src_leftButtonHover;
					} else {
						butt1.animate({opacity: 0.5}, 200, function() {
							butt1[0].node.href.baseVal = src_leftButtonHover;
							butt1.animate({opacity: 1}, 200);
						});
					}
				}).mouseout(function () {
                    if(IE && MSIE_ver < 9) {
                    	butt1[0].node.href.baseVal = src_leftButton;
                    } else {
						butt1.animate({opacity: 0.5}, 200, function() {
							butt1[0].node.href.baseVal = src_leftButton;
							butt1.animate({opacity: 1}, 200);
						});
					}
				});
				';
		} else {
			$html .= '
				butt1.push(R.circle(24.833, 26.917, 26.667).attr({stroke: "'.$this->getDesignElement('leftButtonBorderColor').'", fill: "#fff", "fill-opacity": .4, "stroke-width": 2}),
				           R.path("M12.582,9.551C3.251,16.237,0.921,29.021,7.08,38.564l-2.36,1.689l4.893,2.262l4.893,2.262l-0.568-5.36l-0.567-5.359l-2.365,1.694c-4.657-7.375-2.83-17.185,4.352-22.33c7.451-5.338,17.817-3.625,23.156,3.824c5.337,7.449,3.625,17.813-3.821,23.152l2.857,3.988c9.617-6.893,11.827-20.277,4.935-29.896C35.591,4.87,22.204,2.658,12.582,9.551z").attr({stroke: "none", fill: "'.$this->getDesignElement('leftButtonColor').'"}),
				           R.circle(24.833, 26.917, 26.667).attr({fill: "#fff", opacity: 0}));
				butt1.translate(10, 20);
				butt1[2].click(function () {
				    angle -= 10;
				    img.stop().animate({transform: "r" + angle}, 1000, "<>");
				    document.getElementById("ezin_antispam").value = angle;
				}).mouseover(function () {
				    butt1[1].animate({fill: "'.$this->getDesignElement('leftButtonColorHover').'"}, 300);
				}).mouseout(function () {
				    butt1[1].stop().attr({fill: "'.$this->getDesignElement('leftButtonColor').'"});
				});
				';
		}
		if ($rightButtonImage) {
			$html .= '
				butt2.push(R.image(src_rightButton, 0, 0, '.$rightButtonImageInfo['width'].', '.$rightButtonImageInfo['height'].'));
				butt2.translate('.($this->imageInfo['width'] + 40).', 20);
				butt2.click(function () {                                       //antispam_log("klik DOPRAVA");
				    angle += 10;                                                //antispam_log("angle "+angle.toString());
				    img.stop().animate({transform: "r" + angle}, 1000, "<>");
				    document.getElementById("ezin_antispam").value = angle;     //antispam_log("-------------------------");
				}).mouseover(function () {
					if(IE && MSIE_ver < 9) {
						butt2[0].node.href.baseVal = src_rightButtonHover;
					} else {
						butt2.animate({opacity: 0.5}, 200, function() {
							butt2[0].node.href.baseVal = src_rightButtonHover;
							butt2.animate({opacity: 1}, 200);
						});
					}
				}).mouseout(function () {
					if(IE && MSIE_ver < 9) {
						butt2[0].node.href.baseVal = src_rightButton;
					} else {
						butt2.animate({opacity: 0.5}, 200, function() {
							butt2[0].node.href.baseVal = src_rightButton;
							butt2.animate({opacity: 1}, 200);
						});
					}
				});
				';
		} else {
			$html .= '
				butt2.push(R.circle(24.833, 26.917, 26.667).attr({stroke: "'.$this->getDesignElement('rightButtonBorderColor').'", fill: "#fff", "fill-opacity": .4, "stroke-width": 2}),
				           R.path("M37.566,9.551c9.331,6.686,11.661,19.471,5.502,29.014l2.36,1.689l-4.893,2.262l-4.893,2.262l0.568-5.36l0.567-5.359l2.365,1.694c4.657-7.375,2.83-17.185-4.352-22.33c-7.451-5.338-17.817-3.625-23.156,3.824C6.3,24.695,8.012,35.06,15.458,40.398l-2.857,3.988C2.983,37.494,0.773,24.109,7.666,14.49C14.558,4.87,27.944,2.658,37.566,9.551z").attr({stroke: "none", fill: "'.$this->getDesignElement('rightButtonColor').'"}),
				           R.circle(24.833, 26.917, 26.667).attr({fill: "#fff", opacity: 0}));
				butt2.translate('.($this->imageInfo['width'] + 40).', 20);
				butt2[2].click(function () {
				    angle += 10;
				    img.animate({transform: "r" + angle}, 1000, "<>");
				    document.getElementById("ezin_antispam").value = angle;
				}).mouseover(function () {
				    butt2[1].animate({fill: "'.$this->getDesignElement('rightButtonColorHover').'"}, 300);
				}).mouseout(function () {
				    butt2[1].stop().attr({fill: "'.$this->getDesignElement('rightButtonColor').'"});
				});
				';
		}
		$html .= '
				setTimeout(function () {R.safari();});
				
				function updateAngle() {
                	img.stop().animate({transform: "r" + angle}, 1, "<>");
                	//console.log("updateAngle");
                	setTimeout("updateAngle();", 5000);
				}
				updateAngle();
				
			</script>
		';
		return $html;
	}
	
	/**
	 *  nastavi ziadany text
	 *
	 *  @param string $key			- kluc retazca
	 *  @param string $value			- hodnota prisluchajuca klucu
	 *  @return void
	 */
	public function setText($key, $value) {
		$this->texts[$key] = $value;
	}
	
	/**
	 *  nastavi dizajn
	 *
	 *  @param string $arr			- asociativne pole prvkov
	 *  @return void
	 */
	public function setDesign($arr) {
		if (!is_array($arr)) {
			return false;
		}
		foreach($arr as $key => $val) {
			$this->setDesignElement($key, $val);
		}
	}

	/**
	 *  nastavi dizajn jedneho elementu
	 *
	 *  @param string $key			- kluc elementu
	 *  @param string $val			- hodnota elementu
	 *  @return void
	 */
	public function setDesignElement($key, $val) {
		if (strlen($key) <= 0) {
			return false;
		}
		$this->design[$key] = $val;
	}

     /**
	 *  skontroluje ovdpoved
	 *
	 *  @param $answer				- odpoved, ak nie je nastavena default to berie z $_POST
	 *  @return bool				- spravnost odpovede, TRUE = spravna, FALSE = nespravna
	 */
	public function correctAnswer($answer_user = null) {
		$this->addLog('Spusta sa correctAnswer');
		if (is_null($this->correctAnswer_cache)) {
			$this->addLog('Prvy krat spracuvavam');
			$answer_user = (is_null($answer_user)) ? @$_POST[$this->answer_name] : $answer_user;
			$answer = @$_SESSION['RotateAntispam']['answer'];
			$this->addLog('Odpoved pouzivatela je "'.$answer_user.'"');
			if (!isset($answer)
				|| strlen($answer) <= 0)
			{
			     $this->addLog('Odpoved nebola nastavena');
				$this->correctAnswer_cache = false;
			} else {
				$this->addLog('Spravna odpoved je "'.$answer.'"');
				$this->correctAnswer_cache = ($answer == $answer_user);
			}
			$_SESSION['RotateAntispam'] = null;
			unset($_SESSION['RotateAntispam']);
		}
		$this->addLog('Vraciam odpoved '.(($this->correctAnswer_cache) ? 'TRUE' : 'FALSE'));
		$this->addLog('<hr>JavaScript LOG: <br>'.nl2br(@$_REQUEST['antispam_log']));
		return $this->correctAnswer_cache;
	}
	
	// ====[ Funkcie - vseobecne ]=============================================
	

} // class RotateAntispam

error_reporting(E_ALL && ~E_NOTICE);

// ak nie je nastartovana $_SESSION
if (!isset($_SESSION)
	|| strlen(session_id()) == 0)
{
	session_start();
}

function loadFromSession($name) {
	$ret = null;
	$maxSleep = 10;
	$sleep = 1;
	while (strlen($ret) <= 0 && $maxSleep > 0) {
		$ret = @$_SESSION['RotateAntispam'][$name];
		sleep($sleep); // prve nacitanie = 0
		$sleep = 1;
		$maxSleep--;
	}
	return $ret;
}

// Spracovanie vyziadaneho obrazku
if (isset($_REQUEST['getImage'])) {
	$filename = loadFromSession('image');
	if (strlen($filename) <= 0
		|| !file_exists($filename))
	{
		die('Neexistuje obrazok "'.$filename.'"');
	}
	$shift = loadFromSession('shift');
	do {
		$degrees = (rand(-5,5) * 10) + $shift;
	} while($degrees == $shift || $_SESSION['RotateAntispam']['answer'] == $degrees);
	$_SESSION['RotateAntispam']['answer'] = (string)$degrees;

	if(!function_exists("imagerotate")) {
	    function imagerotate($srcImg, $angle, $bgcolor=0, $ignore_transparent = 0) {
	        return imagerotateEquivalent($srcImg, $angle, $bgcolor, $ignore_transparent);
	    }
	}

	/*
	    Imagerotate replacement. ignore_transparent is work for png images
	    Also, have some standard functions for 90, 180 and 270 degrees.
	    Rotation is clockwise
	*/

	function imagerotateEquivalent($srcImg, $angle, $bgcolor, $ignore_transparent = 0) {
	    function rotateX($x, $y, $theta){
	        return $x * cos($theta) - $y * sin($theta);
	    }
	    function rotateY($x, $y, $theta){
	        return $x * sin($theta) + $y * cos($theta);
	    }

	    $srcw = imagesx($srcImg);
	    $srch = imagesy($srcImg);

	    //Normalize angle
	    $angle %= 360;
	    //Set rotate to clockwise
	    //$angle = -$angle;

	    if($angle == 0) {
	        if ($ignore_transparent == 0) {
	            imagesavealpha($srcImg, true);
	        }
	        return $srcImg;
	    }

	    // Convert the angle to radians
	    $theta = deg2rad ($angle);

	    //Standart case of rotate
	    if ( (abs($angle) == 90) || (abs($angle) == 270) ) {
	        $width = $srch;
	        $height = $srcw;
	        if ( ($angle == 90) || ($angle == -270) ) {
	            $minX = 0;
	            $maxX = $width;
	            $minY = -$height+1;
	            $maxY = 1;
	        } else if ( ($angle == -90) || ($angle == 270) ) {
	            $minX = -$width+1;
	            $maxX = 1;
	            $minY = 0;
	            $maxY = $height;
	        }
	    } else if (abs($angle) === 180) {
	        $width = $srcw;
	        $height = $srch;
	        $minX = -$width+1;
	        $maxX = 1;
	        $minY = -$height+1;
	        $maxY = 1;
	    } else {
	        // Calculate the width of the destination image.
	        $temp = array (rotateX(0, 0, 0-$theta),
	        rotateX($srcw, 0, 0-$theta),
	        rotateX(0, $srch, 0-$theta),
	        rotateX($srcw, $srch, 0-$theta)
	        );
	        $minX = floor(min($temp));
	        $maxX = ceil(max($temp));
	        $width = $maxX - $minX;

	        // Calculate the height of the destination image.
	        $temp = array (rotateY(0, 0, 0-$theta),
	        rotateY($srcw, 0, 0-$theta),
	        rotateY(0, $srch, 0-$theta),
	        rotateY($srcw, $srch, 0-$theta)
	        );
	        $minY = floor(min($temp));
	        $maxY = ceil(max($temp));
	        $height = $maxY - $minY;
	    }

	    $destimg = imagecreatetruecolor($width, $height);
	    if ($ignore_transparent == 0) {
	        imagefill($destimg, 0, 0, imagecolorallocatealpha($destimg, 255,255, 255, 127));
	        imagesavealpha($destimg, true);
	    }

	    // sets all pixels in the new image
	    for($x=$minX; $x<$maxX; $x++) {
	        for($y=$minY; $y<$maxY; $y++) {
	            // fetch corresponding pixel from the source image
	            $srcX = round(rotateX($x, $y, $theta));
	            $srcY = round(rotateY($x, $y, $theta));
	            if($srcX >= 0 && $srcX < $srcw && $srcY >= 0 && $srcY < $srch) {
	                $color = imagecolorat($srcImg, $srcX, $srcY );
	            } else {
	                $color = $bgcolor;
	            }
	            imagesetpixel($destimg, $x-$minX, $y-$minY, $color);
	        }
	    }
	    return $destimg;
	}

	header('Content-type: image/png');
	$source = imagecreatefrompng($filename);
	$color = imagecolorallocate($source, 204, 204, 204);
	$rotate = imagerotate($source, $degrees, $color);

	$img = getimagesize($filename);
	$image_info['width'] = $img[0];
	$image_info['height'] = $img[1];
	$image_info['type'] = $img[2];
	$image_info['mime'] = $img['mime'];

	$rotate_width = imagesx($rotate);
	$rotate_height = imagesy($rotate);

	$trim_image = imagecreatetruecolor($image_info['width'], $image_info['height']);
	imagecopyresampled($trim_image, $rotate,
					0, 0,
					($rotate_width - $image_info['width']) / 2, ($rotate_height - $image_info['height']) / 2,
					$image_info['width'], $image_info['height'],
					$image_info['width'], $image_info['height'] );

	imagecolortransparent($trim_image, $color);
	imagepng($trim_image);

}

?>