/**
* Get the thumbnail url to be displayed.
* If the thumbnail exists, and it is up-to-date
* the thumbnail url will be returns. If the
* file is not an image, a default image will be returned.
* If it is an image file, and no thumbnail exists or
* the thumbnail is out-of-date (i.e. the thumbnail
* modified time is less than the original file)
* then a thumbs.php?img=filename.jpg is returned.
* The thumbs.php url will generate a new thumbnail
* on the fly. If the image is less than the dimensions
* of the thumbnails, the image will be display instead.
* @param string $relative the relative image file.
* @return string the url of the thumbnail, be it
* actually thumbnail or a script to generate the
* thumbnail on the fly.
*/
function getThumbnail($relative)
{
global $IMConfig;
_ddt(__FILE__, __LINE__, "getThumbnail(): top with '{$relative}'");
$fullpath = Files::makeFile($this->getImagesDir(), $relative);
//not a file???
if (!is_file($fullpath)) {
return $this->getDefaultThumb();
}
$imgInfo = @getImageSize($fullpath);
//not an image
if (!is_array($imgInfo)) {
return $this->getDefaultThumb();
}
//the original image is smaller than thumbnails,
//so just return the url to the original image.
if ($imgInfo[0] <= $this->config['thumbnail_width'] && $imgInfo[1] <= $this->config['thumbnail_height']) {
return $this->getFileURL($relative);
}
$thumbnail = $this->getThumbName($fullpath);
//check for thumbnails, if exists and
// it is up-to-date, return the thumbnail url
if (is_file($thumbnail)) {
if (filemtime($thumbnail) >= filemtime($fullpath)) {
_ddt(__FILE__, __LINE__, "getThumbnail(): returning url '" . $this->getThumbURL($relative) . "'");
return $this->getThumbURL($relative);
}
}
//well, no thumbnail was found, so ask the thumbs.php
//to generate the thumbnail on the fly.
return $IMConfig['backend_url'] . '__function=thumbs&img=' . rawurlencode($relative);
}
include_once $IMConfig['base_dir'] . "/manager.php";
exit;
break;
case "images":
include_once $IMConfig['base_dir'] . "/images.php";
exit;
break;
case "thumbs":
include_once $IMConfig['base_dir'] . "/thumbs.php";
exit;
break;
case "resizer":
include_once $IMConfig['base_dir'] . "/resizer.php";
exit;
break;
case "youtube":
include_once $IMConfig['base_dir'] . "/youtube.php";
exit;
break;
case "flickr":
include_once $IMConfig['base_dir'] . "/flickr.php";
exit;
break;
default:
_ddt(__FILE__, __LINE__, "function request not supported");
_error(__FILE__, __LINE__, "function request not supported");
break;
}
// end of switch.
return false;
// END