fc.php

<?php
/**
 * FakeBurner
 * FeedBurner counter imitator / Имитатор счетчика FeedBurner
 * Originally written for Zebrum Bloglike (http://zebrum.net.ru)
 *
 * @author Alek$ <aleks@aradmin.org.ru> http://nevkontakte.org.ru
 * @copyright Alek$, 2009
 * @license GNU General Public License v 2
 */
/**
 * Feel free to use and spread this script, but please keep my copyrights
 * Вы можете свободно пользоваться этим скриптом и распространять его, но, пожалуйста, сохраняйте мои копирайты
 */

$bgcolor = '#99CCFF';		// Основной цвет фона
$fgcolor = '#000000';		// Цвет текста
$readers = 50;				// Среднее количество читателей
$fluctuation = 10;			// Максимальное отклонение от среднего количества читателей

class FakeBurner
{
	private $readers = 0;
	private $fluct = 0;
	private $fgcolor = '000000';
	private $bgcolor = '99cccc';
	
	private $img;
	
	function FakeBurner($options = null)
	{
		if(is_array($options))
		{
			$this->SetOptions($options);
		}
		
		$this->img = imagecreatetruecolor(88, 26);
	}
	
	function SetOptions($options)
	{
		if(is_array($options))
		{
			foreach($options as $key => $val)
			{
				$this->SetOption($key, $val);
			}
		}
	}
	
	function SetOption($key, $value)
	{
		switch($key)
		{
			case 'readers':
				return $this->readers = intval($value);
			case 'fluct':
			case 'fluctuations':
				return $this->fluct = intval($value);
			case 'bgcolor':
			case 'bg':
				return $this->bgcolor = ltrim($value, '#');
			case 'fgcolor':
			case 'fg':
				return $this->fgcolor = ltrim($value, '#');
		}
	}
	
	function Rgb2hsv($r, $g, $b)
	{
		$r /= 255;
		$g /= 255;
		$b /= 255;
		
		$V = max($r, max($g, $b));
		$v = min($r, min($g, $b));
		
		$S = ($V == 0) ? 0 : ($V - $v)/$V;
		
		if($V - $v == 0)
		{
			$cr = $cg = $cb = 0;
		}
		else
		{
			$cr = ($V - $r)/($V - $v);
			$cg = ($V - $g)/($V - $v);
			$cb = ($V - $b)/($V - $v);
		}
		
		if($r == $V)
		{
			$H = $cb - $cg;
		}
		else if($g == $V)
		{
			$H = $cr - $cb + 2;
		}
		else if($b == $V)
		{
			$H = $cg - $cr + 4;
		}
		
		if($H < 0)
		{
			$H += 6;
		}
		
		return array('h' => round($H*60), 's' => round($S*100), 'v' => round($V*100));
	}
	
	function Hsv2rgb($H, $S, $V)
	{
		$H /= 60;
		$S /= 100;
		$V /= 100;
		
		$f = $H - intval($H);
		$m = $V * (1 - $S);
		$i = intval($H);
		$n = $V * (1 - $S * $f);
		$k = $V * (1 - $S * (1 - $f));
		
		switch($i)
		{
			case 0:
				return array('r' => round($V*255), 'g' => round($k*255), 'b' => round($m*255));
			case 1:
				return array('r' => round($n*255), 'g' => round($V*255), 'b' => round($m*255));
			case 2:
				return array('r' => round($m*255), 'g' => round($V*255), 'b' => round($k*255));
			case 3:
				return array('r' => round($m*255), 'g' => round($n*255), 'b' => round($V*255));
			case 4:
				return array('r' => round($k*255), 'g' => round($m*255), 'b' => round($V*255));
			case 5:
			case 6:
				return array('r' => round($V*255), 'g' => round($m*255), 'b' => round($n*255));
		}
	}
	
	function ModifyColor($r, $g, $b, $h = null, $s = null, $v = null)
	{
		$hsv = $this->Rgb2hsv($r, $g, $b);
		
		if($h !== NULL)
		{
			$val = intval(substr($h, 1));
			
			switch($h[0])
			{
				case ' ':
					$hsv['h'] = $val;
					break;
				case '+':
					$hsv['h'] += $val;
					break;
				case '-':
					$hsv['h'] -= $val;
					break;
			}
			
			$hsv['h'] = min(360, max(0, $hsv['h']));
		}
		
		if($v !== NULL)
		{
			$val = intval(substr($v, 1));
			
			switch($v[0])
			{
				case ' ':
					$hsv['v'] = $val;
					break;
				case '+':
					$hsv['v'] += $val;
					break;
				case '-':
					$hsv['v'] -= $val;
					break;
			}
			$hsv['v'] = min(100, max(0, $hsv['v']));
		}
		
		if($s !== NULL)
		{
			$val = intval(substr($s, 1));
			
			switch($s[0])
			{
				case ' ':
					$hsv['s'] = $val;
					break;
				case '+':
					$hsv['s'] += $val;
					break;
				case '-':
					$hsv['s'] -= $val	;
					break;
			}
			$hsv['s'] = min(100, max(0, $hsv['s']));
		}
		
		return $this->Hsv2rgb($hsv['h'], $hsv['s'], $hsv['v']);
	}
	
	function GetReaders()
	{
		return max(0, $this->readers + ((date('d')+date('m')+date('y')+date('H')) % ($this->fluct*2)) - $this->fluct);
	}
	
	function Render($fakeburner = false)
	{
		// Calculate colors
		$bgrgb= array(
			'r'	=> hexdec(substr($this->bgcolor, 0, 2)),
			'g'	=> hexdec(substr($this->bgcolor, 2, 2)),
			'b'	=> hexdec(substr($this->bgcolor, 4, 2)),
		);
		
		$fgrgb= array(
			'r'	=> hexdec(substr($this->fgcolor, 0, 2)),
			'g'	=> hexdec(substr($this->fgcolor, 2, 2)),
			'b'	=> hexdec(substr($this->fgcolor, 4, 2)),
		);
		
		//var_dump($fgrgb);
		
		$bgboxrgb = $this->ModifyColor($bgrgb['r'], $bgrgb['g'], $bgrgb['b'], null, '-25', '+5');
		$bgboxdarkrgb = $this->ModifyColor($bgrgb['r'], $bgrgb['g'], $bgrgb['b'], null, '-25', '-20');
		$borderlightrgb = $this->ModifyColor($bgrgb['r'], $bgrgb['g'], $bgrgb['b'], null, null, ' 100');
		$borderdarkrgb = $this->ModifyColor($bgrgb['r'], $bgrgb['g'], $bgrgb['b'], null, '-25', '-40');
		
		// Init color resources
		$transparent = imagecolorallocate($this->img, 255, 1, 254);
		$bg = imagecolorallocate($this->img, $bgrgb['r'], $bgrgb['g'], $bgrgb['b']);
		$bgbox = imagecolorallocate($this->img, $bgboxrgb['r'], $bgboxrgb['g'], $bgboxrgb['b']);
		$bgboxdark = imagecolorallocate($this->img, $bgboxdarkrgb['r'], $bgboxdarkrgb['g'], $bgboxdarkrgb['b']);
		$bgboxlight = imagecolorallocate($this->img, 255, 255, 255);
		$borderlight = imagecolorallocate($this->img, $borderlightrgb['r'], $borderlightrgb['g'], $borderlightrgb['b']);
		$borderdark = imagecolorallocate($this->img, $borderdarkrgb['r'], $borderdarkrgb['g'], $borderdarkrgb['b']);
		
		$textcolor = imagecolorallocate($this->img, $fgrgb['r'], $fgrgb['g'], $fgrgb['b']);
		$byfeedburner = imagecolorallocate($this->img, 108, 108, 108);
		
		// Enable transparency
		imagecolortransparent($this->img, $transparent);
		
		// Draw background
		imagefilledrectangle($this->img, 0, 0, 88, 26, $transparent);
		
		// Main bar
		imagefilledrectangle($this->img, 0, 0, 88, 18, $bg);
		imageline($this->img, 0, 0, 88, 0, $borderlight);
		imageline($this->img, 0, 0, 0, 18, $borderlight);
		imageline($this->img, 1, 18, 87, 18, $borderdark);
		imageline($this->img, 87, 1, 87, 18, $borderdark);
		
		// Number bar
		imagefilledrectangle($this->img, 3, 2, 38, 15, $bgbox);
		imageline($this->img, 3, 2, 3, 15, $bgboxdark);
		imageline($this->img, 3, 2, 38, 2, $bgboxdark);
		imageline($this->img, 4, 15, 38, 15, $bgboxlight);
		imageline($this->img, 38, 3, 38, 15, $bgboxlight);
		
		//Draw text
		$x = 36 - imagefontwidth(2)*strlen($this->readers);
		imagestring($this->img, 2, $x, 2, $this->GetReaders(), $textcolor);
		
		imagestring($this->img, 2, 43, 2, 'readers', $textcolor);
		
		if($fakeburner)
		{
			$str = 'BY FAKEBURNER';
		}
		else
		{
			$str = 'BY FEEDBURNER';
		}
		$width = imagesx($this->img) - 2;
		$step = $width/strlen($str);
		//var_dump($width, $step);
		for($i = 0; $i < strlen($str); $i ++)
		{
			imagestring($this->img, 1, 2 + $i*$step, 19, $str[$i], $byfeedburner);
		}
	}
	
	function Output($fakeburner = false)
	{
		$this->Render($fakeburner);
		
		header('Content-Type: image/gif');
		imagegif($this->img);
	}
}

$fc = new FakeBurner();
$fc->SetOption('bg', $bgcolor);
$fc->SetOption('fg', $fgcolor);
$fc->SetOption('fluct', $fluctuation);
$fc->SetOption('readers', $readers);
$fc->Output();
?>