source: subversion/branches/release-0.2-beta/bin/quotaimg.php @ 2162

<?php
/*
 +-----------------------------------------------------------------------+
 | bin/quotaimg.php                                                      |
 |                                                                       |
 | This file is part of the RoundCube Webmail client                     |
 | Copyright (C) 2005-2008, RoundCube Dev. - Switzerland                 |
 | Licensed under the GNU GPL                                            |
 |                                                                       |
 | PURPOSE:                                                              |
 |   Create a GIF image showing the mailbox quot as bar                  |
 |                                                                       |
 +-----------------------------------------------------------------------+
 | Author: Brett Patterson <brett2@umbc.edu>                             |
 +-----------------------------------------------------------------------+

 $Id$

*/

$used   = isset($_GET['u']) ? intval($_GET['u']) : '??';
$quota  = isset($_GET['q']) ? intval($_GET['q']) : '??';
$width  = empty($_GET['w']) ? 100 : min(300, intval($_GET['w']));
$height = empty($_GET['h']) ? 14  : min(50,  intval($_GET['h']));

/**
 * Quota display
 * 
 *      Modify the following few elements to change the display of the image.
 *      Modifiable attributes are:
 *      bool    border  ::      Defines whether you want to show a border around it?
 *      bool    unknown ::      Leave default; Defines whether quota is "unknown"
 *
 *      int             height  ::      Defines height of the image
 *      int             width   ::      Defines width of the image
 *      int             font    ::      Changes the font size & font used in the GD library.
 *                                              Available values are from 1 to 5.
 *      int             padding ::      Changes the offset (in pixels) from the top of the image
 *                      to where the top of the text will be aligned. User
 *                      greater than 0 to ensure text is off the border.
 *      array   limit   ::      Holds the integer values of in an associative array as
 *                      to what defines the upper and lower levels for quota
 *                      display.
 *                                              High - Quota is nearing capacity.
 *                                              Mid  - Quota is around the middle
 *                                              Low  - Currently not used.
 *      array   color   ::      An associative array of strings of comma separated
 *                      values (R,G,B) for use in color creation.  Define the
 *                      RGB values you'd like to use. A list of colors (and
 *                      their RGB values) can be found here:
 *                                              http://www.december.com/html/spec/colorcodes.html
 * 
 * @return void
 * 
 * @param mixed $used   The amount used, or ?? if unknown.
 * @param mixed $total  The total available, or ?? if unknown.
 * @param int   $width  Width of the image.
 * @param int   $height Height of the image.
 * 
 * @see rcube_imap::get_quota()
 * @see iil_C_GetQuota()
 * 
 * @todo Make colors a config option.
 */
function genQuota($used, $total, $width, $height)
{
        $unknown = false;
        $border  = 0;

        $font    = 2;
        $padding = 0;

        $limit['high'] = 70;
        $limit['mid']  = 45;
        $limit['low']  = 0;

        // Fill Colors
        $color['fill']['high'] = '215, 13, 13';   // Near quota fill color
        $color['fill']['mid']  = '126, 192, 238'; // Mid-area of quota fill color
        $color['fill']['low']  = '147, 225, 100'; // Far from quota fill color

        // Background colors
        $color['bg']['OL']      = '215, 13, 13';   // Over limit bbackground
        $color['bg']['Unknown'] = '238, 99, 99';   // Unknown background
        $color['bg']['quota']   = '255, 255, 255'; // Normal quota background

        // Misc. Colors
        $color['border'] = '0, 0, 0';
        $color['text']   = '102, 102, 102';


        /************************************
         *****  DO NOT EDIT BELOW HERE  *****
         ***********************************/

    // @todo: Set to "??" instead?
        if (ereg("^[^0-9?]*$", $used) || ereg("^[^0-9?]*$", $total)) {
                return false; 
        }

        if (strpos($used, '?') !== false || strpos($total, '?') !== false && $used != 0) {
                $unknown = true; 
        }

        $im = imagecreate($width, $height);

        if ($border) {
                list($r, $g, $b) = explode(',', $color['border']);
        
                $borderc = imagecolorallocate($im, $r, $g, $b);
        
                imageline($im, 0, 0, $width, 0, $borderc);
                imageline($im, 0, $height-$border, 0, 0, $borderc);
                imageline($im, $width-1, 0, $width-$border, $height, $borderc);
                imageline($im, $width, $height-$border, 0, $height-$border, $borderc);
        }
                
        list($r, $g, $b) = explode(',', $color['text']);
        $text = imagecolorallocate($im, $r, $g, $b);

        if ($unknown) {
                list($r, $g, $b) = explode(',', $color['bg']['Unknown']);
                $background = imagecolorallocate($im, $r, $g, $b);
                imagefilledrectangle($im, 0, 0, $width, $height, $background);

                $string = 'Unknown';
                $mid    = floor(($width-(strlen($string)*imagefontwidth($font)))/2)+1;
                imagestring($im, $font, $mid, $padding, $string, $text);
        } else if ($used > $total) {
                list($r, $g, $b) = explode(',', $color['bg']['OL']);
        
                $background = imagecolorallocate($im, $r, $g, $b);
        
                imagefilledrectangle($im, 0, 0, $width, $height, $background);

                $string = 'Over Limit';
                $mid    = floor(($width-(strlen($string)*imagefontwidth($font)))/2)+1;
                imagestring($im, $font, $mid, $padding, $string, $text);
        } else {
                list($r, $g, $b) = explode(',', $color['bg']['quota']);
        
                $background = imagecolorallocate($im, $r, $b, $g);
        
                imagefilledrectangle($im, 0, 0, $width, $height, $background);
                
                $quota = ($used==0)?0:(round($used/$total, 2)*100);

                if ($quota >= $limit['high']) {
                        list($r, $g, $b) = explode(',', $color['fill']['high']);
                        $fill = imagecolorallocate($im, $r, $g, $b);
                } elseif($quota >= $limit['mid']) {
                        list($r, $g, $b) = explode(',', $color['fill']['mid']);
                        $fill = imagecolorallocate($im, $r, $g, $b);
                } else {
                        // if($quota >= $limit['low'])
                        list($r, $g, $b) = explode(',', $color['fill']['low']);
                        $fill = imagecolorallocate($im, $r, $g, $b);
                }

                $quota_width = $quota / 100 * $width;
                imagefilledrectangle($im, $border, 0, $quota_width, $height-2*$border, $fill);

                $string = $quota . '%';
                $mid    = floor(($width-(strlen($string)*imagefontwidth($font)))/2)+1;
                // Print percent in black
                imagestring($im, $font, $mid, $padding, $string, $text); 
        }

        header('Content-Type: image/gif');

        // cache for 1 hour
        $maxage = 3600;
        header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$maxage). ' GMT');
        header('Cache-Control: max-age=' . $maxage);
        
        imagegif($im);
        imagedestroy($im);
}

if ($width > 1 && $height > 1) {
        genQuota($used, $quota, $width, $height);  
}
else {
        header("HTTP/1.0 404 Not Found");
}

exit;
?>