*/
/**
* patTemplate-function to display QRCodes
*
* Usage
* [[PROTOCOL]]://[[SERVER]][[SELF]]{URI}
*
* [[PROTOCOL]]://[[SERVER]][[SELF]]{URI}
*
* @version 1.1.0
* @package Wombat
* @subpackage patTemplate
*/
class patTemplate_Function_Qrcode extends patTemplate_Function
{
/**
* Name of Function
*
* @access private
* @var string
*/
public $_name = 'Qrcode';
/**
* Function Type
*
* Tell that this function has to be executed during runtime
* @var string
*/
public $_type = PATTEMPLATE_FUNCTION_RUNTIME;
/**
* QR-Code Generator
*
* @var WBUte_QRCode
*/
private $qrc;
/**
* Call the function
*
* Initialize WBUte_QRCode, set configuration parameter and QRCode-Text and finally
* render either for HTML or LaTeX (see: attribute "mode")
*
* Known parameter
* - mode: html (default) or latex
* - class: class-attribute name for HTML img-tag
* - border: 1 (default) or 0 for no border Usually QRCodes with border are easier to scan
* - width: "" (default) for LaTeX includegraphics and HTML
* - height: "" (default) for LaTeX includegraphics and HTML
* Furthermore all parameters will be passed as configuration parameter to WBUte_QRCode
*
* @see WBUte_QRCode::configure()
* @param array $params parameters of the function (= attributes of the tag)
* @param string $content inside tag
* @return string content to insert into the template
*/
public function call($params, $content)
{
$paramsDef = array(
'mode' => 'html',
'class' => '',
'border' => 1,
'width' => '',
'height' => ''
);
$params = array_merge($paramsDef, $params);
$this->qrc = WBClass::create('WBUte_QRCode');
$this->qrc->configure($params);
$content = WBString::replaceSuperPlaceholders($content);
$this->qrc->setText($content);
switch (strtolower($params['mode'])) {
case 'tex':
case 'latex':
return $this->get4LaTeX($params);
break;
default:
case 'html':
return $this->get4HTML($params);
break;
}
}
/**
* Get Content for LaTeX Output
*
* @todo to be implemented
* @param array
*/
private function get4LaTeX($params)
{
$att = array('keepaspectratio');
$key = array(
'width',
'height'
);
foreach ($key as $k) {
if (empty($params[$k])) {
continue;
}
$att[] = sprintf('%s=%s', $k, $params[$k]);
}
$file = $this->qrc->getImage()->realpath();
rename($file, $file . '.png');
$tex = '\includegraphics[%s]{%s}';
return sprintf($tex, implode(',', $att), $file . '.png');
}
/**
* Get Content for HTML Output
*
* Convert image file to base64 and render img-tag with inline image data
*
* @param array
*/
private function get4HTML($params)
{
$file = $this->qrc->getImage();
$file = base64_encode(file_get_contents($file->realpath()));
$this->qrc->flush();
$att = array();
$key = array(
'class',
'width',
'height'
);
foreach ($key as $k) {
if (empty($params[$k])) {
continue;
}
$att[] = sprintf('%s=%s', $k, $params[$k]);
}
$att = implode(' ', $att);
return sprintf('
', $att, $file);
}
}