/**
* Overrides the TCPDF::Image method to decrypt encrypted $file paths from the Image widget, then pass
* them to the normal TCPDF::Image along with all of the other (unmodified) parameters.
*
* @param string $file Name of the file containing the image.
* @param float $x Abscissa of the upper-left corner.
* @param float $y Ordinate of the upper-left corner.
* @param float $w Width of the image in the page. If not specified or equal to zero, it is automatically calculated.
* @param float $h Height of the image in the page. If not specified or equal to zero, it is automatically calculated.
* @param string $type Image format. Possible values are (case insensitive): JPEG and PNG (whitout GD library) and all images supported by GD: GD, GD2, GD2PART, GIF, JPEG, PNG, BMP, XBM, XPM;. If not specified, the type is inferred from the file extension.
* @param mixed $link URL or identifier returned by AddLink().
* @param string $align Indicates the alignment of the pointer next to image insertion relative to image height. The value can be:<ul><li>T: top-right for LTR or top-left for RTL</li><li>M: middle-right for LTR or middle-left for RTL</li><li>B: bottom-right for LTR or bottom-left for RTL</li><li>N: next line</li></ul>
* @param bool $resize If true resize (reduce) the image to fit $w and $h (requires GD library).
* @param int $dpi dot-per-inch resolution used on resize
* @param string $palign Allows to center or align the image on the current line. Possible values are:<ul><li>L : left align</li><li>C : center</li><li>R : right align</li><li>'' : empty string : left for LTR or right for RTL</li></ul>
* @param bool $ismask true if this image is a mask, false otherwise
* @param mixed $imgmask image object returned by this function or false
* @param mixed $border Indicates if borders must be drawn around the image. The value can be either a number:<ul><li>0: no border (default)</li><li>1: frame</li></ul>or a string containing some or all of the following characters (in any order):<ul><li>L: left</li><li>T: top</li><li>R: right</li><li>B: bottom</li></ul>
*
* @since 1.0
*/
public function Image($file, $x = '', $y = '', $w = 0, $h = 0, $type = '', $link = '', $align = '', $resize = false, $dpi = 300, $palign = '', $ismask = false, $imgmask = false, $border = 0)
{
if (self::$logger == null) {
self::$logger = new Logger('TCPDF');
}
$config = ConfigProvider::getInstance();
self::$logger->debug('Processing image file URL [' . $file . ']');
try {
if (mb_strpos($file, '/tk/') !== false) {
$start = mb_strpos($file, '/tk/') + 3;
$end = mb_strlen($file);
$tk = mb_substr($file, $start + 1, $end - ($start + 1));
$decoded = FrontController::getDecodeQueryParams($tk);
parent::Image($decoded['source'], $x, $y, $w, $h, $type, $link, $align, $resize, $dpi, $palign, $ismask, $imgmask, $border);
} else {
// it has no query string, so threat as a regular image URL
if (Validator::isURL($file)) {
parent::Image($config->get('app.root') . '/' . Image::convertImageURLToPath($file), $x, $y, $w, $h, $type, $link, $align, $resize, $dpi, $palign, $ismask, $imgmask, $border);
} else {
parent::Image($file, $x, $y, $w, $h, $type, $link, $align, $resize, $dpi, $palign, $ismask, $imgmask, $border);
}
}
} catch (\Exception $e) {
self::$logger->error('Error processing image file URL [' . $file . '], error [' . $e->getMessage() . ']');
throw $e;
}
}
/**
* Testing that the getDecodeQueryParams method will return the known params with a known encrypted result for a test key.
*
* @since 1.0
*/
public function testGetDecodeQueryParams()
{
$config = ConfigProvider::getInstance();
$oldKey = $config->get('security.encryption.key');
$config->set('security.encryption.key', 'testkey12345678901234567');
$tk = '7eYCDOP1AFAv2Kc45D2eSgFM1dJ2mboM4fMMMjs3PP6cb8Qafsv0L06zZjWeIWRH';
$decoded = FrontController::getDecodeQueryParams($tk);
$this->assertEquals('ViewArticleTitle', $decoded['act'], 'testing that the getDecodeQueryParams method will return the known params with a known encrypted result for a test key');
$this->assertEquals('Test_Title', $decoded['title'], 'testing that the getDecodeQueryParams method will return the known params with a known encrypted result for a test key');
$config->set('security.encryption.key', $oldKey);
}