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<?php
declare(strict_types = 1);
namespace BaconQrCode;
use BaconQrCode\Common\ErrorCorrectionLevel;
use BaconQrCode\Encoder\Encoder;
use BaconQrCode\Exception\InvalidArgumentException;
use BaconQrCode\Renderer\RendererInterface;
/**
* QR code writer.
*/
final class Writer
{
/**
* Renderer instance.
*
* @var RendererInterface
*/
private $renderer;
/**
* Creates a new writer with a specific renderer.
*/
public function __construct(RendererInterface $renderer)
{
$this->renderer = $renderer;
}
/**
* Writes QR code and returns it as string.
*
* Content is a string which *should* be encoded in UTF-8, in case there are
* non ASCII-characters present.
*
* @throws InvalidArgumentException if the content is empty
*/
public function writeString(
string $content,
string $encoding = Encoder::DEFAULT_BYTE_MODE_ECODING,
?ErrorCorrectionLevel $ecLevel = null
) : string {
if (strlen($content) === 0) {
throw new InvalidArgumentException('Found empty contents');
}
if (null === $ecLevel) {
$ecLevel = ErrorCorrectionLevel::L();
}
return $this->renderer->render(Encoder::encode($content, $ecLevel, $encoding));
}
/**
* Writes QR code to a file.
*
* @see Writer::writeString()
*/
public function writeFile(
string $content,
string $filename,
string $encoding = Encoder::DEFAULT_BYTE_MODE_ECODING,
?ErrorCorrectionLevel $ecLevel = null
) : void {
file_put_contents($filename, $this->writeString($content, $encoding, $ecLevel));
}
}