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<?php
namespace SimpleSoftwareIO\QrCode;
use BaconQrCode;
use BaconQrCode\Common\ErrorCorrectionLevel;
use BaconQrCode\Encoder\Encoder;
use BaconQrCode\Renderer\Color\Rgb;
use BaconQrCode\Renderer\Image\Eps;
use BaconQrCode\Renderer\Image\Png;
use BaconQrCode\Renderer\Image\RendererInterface;
use BaconQrCode\Renderer\Image\Svg;
use BaconQrCode\Writer;
class BaconQrCodeGenerator implements QrCodeInterface
{
/**
* Holds the BaconQrCode Writer Object.
*
* @var \BaconQrCode\Writer
*/
protected $writer;
/**
* Holds the QrCode error correction levels. This is stored by using the BaconQrCode ErrorCorrectionLevel class constants.
*
* @var \BaconQrCode\Common\ErrorCorrectionLevel
*/
protected $errorCorrection = ErrorCorrectionLevel::L;
/**
* Holds the Encoder mode to encode a QrCode.
*
* @var string
*/
protected $encoding = Encoder::DEFAULT_BYTE_MODE_ECODING;
/**
* Holds an image string that will be merged with the QrCode.
*
* @var null|string
*/
protected $imageMerge = null;
/**
* The percentage that a merged image should take over the source image.
*
* @var float
*/
protected $imagePercentage = .2;
/**
* BaconQrCodeGenerator constructor.
*
* @param Writer|null $writer
* @param RendererInterface|null $format
*/
public function __construct(Writer $writer = null, RendererInterface $format = null)
{
$format = $format ?: new Svg();
$this->writer = $writer ?: new Writer($format);
}
/**
* Generates a QrCode.
*
* @param string $text The text to be converted into a QrCode
* @param null|string $filename The filename and path to save the QrCode file
*
* @return string|void Returns a QrCode string depending on the format, or saves to a file.
*/
public function generate($text, $filename = null)
{
$qrCode = $this->writer->writeString($text, $this->encoding, $this->errorCorrection);
if ($this->imageMerge !== null) {
$merger = new ImageMerge(new Image($qrCode), new Image($this->imageMerge));
$qrCode = $merger->merge($this->imagePercentage);
}
if ($filename === null) {
return $qrCode;
}
return file_put_contents($filename, $qrCode);
}
/**
* Merges an image with the center of the QrCode.
*
* @param $filepath string The filepath to an image
* @param $percentage float The amount that the merged image should be placed over the qrcode.
* @param $absolute boolean Whether to use an absolute filepath or not.
*
* @return $this
*/
public function merge($filepath, $percentage = .2, $absolute = false)
{
if (function_exists('base_path') && !$absolute) {
$filepath = base_path().$filepath;
}
$this->imageMerge = file_get_contents($filepath);
$this->imagePercentage = $percentage;
return $this;
}
/**
* Merges an image string with the center of the QrCode, does not check for correct format.
*
* @param $content string The string contents of an image.
* @param $percentage float The amount that the merged image should be placed over the qrcode.
*
* @return $this
*/
public function mergeString($content, $percentage = .2)
{
$this->imageMerge = $content;
$this->imagePercentage = $percentage;
return $this;
}
/**
* Switches the format of the outputted QrCode or defaults to SVG.
*
* @param string $format The desired format.
*
* @throws \InvalidArgumentException
*
* @return $this
*/
public function format($format)
{
switch ($format) {
case 'png':
$this->writer->setRenderer(new Png());
break;
case 'eps':
$this->writer->setRenderer(new Eps());
break;
case 'svg':
$this->writer->setRenderer(new Svg());
break;
default:
throw new \InvalidArgumentException('Invalid format provided.');
}
return $this;
}
/**
* Changes the size of the QrCode.
*
* @param int $pixels The size of the QrCode in pixels
*
* @return $this
*/
public function size($pixels)
{
$this->writer->getRenderer()->setHeight($pixels);
$this->writer->getRenderer()->setWidth($pixels);
return $this;
}
/**
* Changes the foreground color of a QrCode.
*
* @param int $red
* @param int $green
* @param int $blue
*
* @return $this
*/
public function color($red, $green, $blue)
{
$this->writer->getRenderer()->setForegroundColor(new Rgb($red, $green, $blue));
return $this;
}
/**
* Changes the background color of a QrCode.
*
* @param int $red
* @param int $green
* @param int $blue
*
* @return $this
*/
public function backgroundColor($red, $green, $blue)
{
$this->writer->getRenderer()->setBackgroundColor(new Rgb($red, $green, $blue));
return $this;
}
/**
* Changes the error correction level of a QrCode.
*
* @param string $level Desired error correction level. L = 7% M = 15% Q = 25% H = 30%
*
* @return $this
*/
public function errorCorrection($level)
{
$this->errorCorrection = constant("BaconQrCode\Common\ErrorCorrectionLevel::$level");
return $this;
}
/**
* Creates a margin around the QrCode.
*
* @param int $margin The desired margin in pixels around the QrCode
*
* @return $this
*/
public function margin($margin)
{
$this->writer->getRenderer()->setMargin($margin);
return $this;
}
/**
* Sets the Encoding mode.
*
* @param string $encoding
*
* @return $this
*/
public function encoding($encoding)
{
$this->encoding = $encoding;
return $this;
}
/**
* Creates a new datatype object and then generates a QrCode.
*
* @param $method
* @param $arguments
*/
public function __call($method, $arguments)
{
$dataType = $this->createClass($method);
$dataType->create($arguments);
return $this->generate(strval($dataType));
}
/**
* Creates a new DataType class dynamically.
*
* @param string $method
*
* @return SimpleSoftwareIO\QrCode\DataTypes\DataTypeInterface
*/
private function createClass($method)
{
$class = $this->formatClass($method);
if (!class_exists($class)) {
throw new \BadMethodCallException();
}
return new $class();
}
/**
* Formats the method name correctly.
*
* @param $method
*
* @return string
*/
private function formatClass($method)
{
$method = ucfirst($method);
$class = "SimpleSoftwareIO\QrCode\DataTypes\\".$method;
return $class;
}
}