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<?php
/**
* Class QRMarkup
*
* @created 17.12.2016
* @author Smiley <smiley@chillerlan.net>
* @copyright 2016 Smiley
* @license MIT
*/
namespace chillerlan\QRCode\Output;
use function is_string, preg_match, strip_tags, trim;
/**
* Abstract for markup types: HTML, SVG, ... XML anyone?
*/
abstract class QRMarkup extends QROutputAbstract{
/**
* note: we're not necessarily validating the several values, just checking the general syntax
* note: css4 colors are not included
*
* @todo: XSS proof
*
* @see https://developer.mozilla.org/en-US/docs/Web/CSS/color_value
* @inheritDoc
*/
public static function moduleValueIsValid($value):bool{
if(!is_string($value)){
return false;
}
$value = trim(strip_tags($value), " '\"\r\n\t");
// hex notation
// #rgb(a)
// #rrggbb(aa)
if(preg_match('/^#([\da-f]{3}){1,2}$|^#([\da-f]{4}){1,2}$/i', $value)){
return true;
}
// css: hsla/rgba(...values)
if(preg_match('#^(hsla?|rgba?)\([\d .,%/]+\)$#i', $value)){
return true;
}
// predefined css color
if(preg_match('/^[a-z]+$/i', $value)){
return true;
}
return false;
}
/**
* @inheritDoc
*/
protected function prepareModuleValue($value):string{
return trim(strip_tags($value), " '\"\r\n\t");
}
/**
* @inheritDoc
*/
protected function getDefaultModuleValue(bool $isDark):string{
return ($isDark) ? '#000' : '#fff';
}
/**
* @inheritDoc
*/
public function dump(?string $file = null):string{
$data = $this->createMarkup($file !== null);
$this->saveToFile($data, $file);
return $data;
}
/**
* returns a string with all css classes for the current element
*/
protected function getCssClass(int $M_TYPE = 0):string{
return $this->options->cssClass;
}
/**
* returns the fully parsed and rendered markup string for the given input
*/
abstract protected function createMarkup(bool $saveToFile):string;
}
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