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<?php | |
namespace com\linways\core\ams\professional\service; | |
use com\linways\core\ams\professional\exception\ProfessionalException; | |
use Endroid\QrCode\QrCode; | |
use Endroid\QrCode\ErrorCorrectionLevel; | |
class QrCodeGenerator extends BaseService | |
{ | |
private $content; | |
private $size; | |
private $margin; | |
private $errorCorrectionLevel; | |
private $color; | |
/** | |
* Constructor for QrCodeGenerator. | |
* | |
* @param string $content The content to encode in the QR code. Defaults to "No Data". | |
* @param int $size The size of the QR code. Defaults to 100. | |
* @param int|null $margin The margin around the QR code. Defaults to 1/10th of the size. | |
* @param string $ec_level The error correction level. One of 'L', 'M', 'Q', 'H'. Defaults to 'H'. | |
* @param string $color The color of the QR code in hexadecimal. Defaults to '000000' (black). | |
* @throws ProfessionalException if any of the parameters are invalid. | |
*/ | |
public function __construct($content = "No Data", $size = 100, $margin = null, $ec_level = 'H', $color = '000000') | |
{ | |
// Validate content | |
if (!is_string($content)) { | |
throw new ProfessionalException("Content must be a string."); | |
} | |
$this->content = $content ? $content : "No Data"; | |
// Validate size | |
if (!is_int($size) || $size <= 0) { | |
throw new ProfessionalException("Size must be an integer greater than 0."); | |
} | |
$this->size = $size ? $size : 100; | |
// Validate margin | |
if ($margin !== null && (!is_int($margin) || $margin < 0)) { | |
throw new ProfessionalException("Margin must be null or an integer greater than or equal to 0."); | |
} | |
$this->margin = ($margin !== null) ? $margin : ceil($this->size / 10); | |
// Validate error correction level | |
$ec_level= ($ec_level !== null) ? $ec_level : 'H'; | |
$valid_ec_levels = ['L', 'M', 'Q', 'H']; | |
if (!in_array(strtoupper($ec_level), $valid_ec_levels)) { | |
throw new ProfessionalException("Error correction level must be one of 'L', 'M', 'Q', 'H'."); | |
} | |
$this->errorCorrectionLevel = strtoupper($ec_level); | |
// Validate color | |
$color = ($color !== null) ? $color : '000000'; | |
if (!preg_match('/^[0-9A-Fa-f]{6}$/', $color)) { | |
throw new ProfessionalException("Color must be a valid hexadecimal color code."); | |
} | |
$this->color = $color; | |
} | |
/** | |
* Gets the error correction level for the QR code. | |
* | |
* @return ErrorCorrectionLevel The corresponding error correction level object. | |
*/ | |
private function getErrorCorrectionLevel() | |
{ | |
switch ($this->errorCorrectionLevel) { | |
case 'L': | |
return ErrorCorrectionLevel::LOW(); | |
case 'M': | |
return ErrorCorrectionLevel::MEDIUM(); | |
case 'Q': | |
return ErrorCorrectionLevel::QUARTILE(); | |
case 'H': | |
default: | |
return ErrorCorrectionLevel::HIGH(); | |
} | |
} | |
/** | |
* Converts a hexadecimal color string to an RGB array. | |
* | |
* @param string $hexColor The hexadecimal color string. | |
* @return array An associative array with keys 'r', 'g', and 'b'. | |
*/ | |
private function hexToRgb($hexColor) | |
{ | |
$hexColor = ltrim($hexColor, '#'); | |
if (strlen($hexColor) == 3) { | |
$hexColor = str_repeat(substr($hexColor, 0, 1), 2) . | |
str_repeat(substr($hexColor, 1, 1), 2) . | |
str_repeat(substr($hexColor, 2, 1), 2); | |
} | |
return [ | |
'r' => hexdec(substr($hexColor, 0, 2)), | |
'g' => hexdec(substr($hexColor, 2, 2)), | |
'b' => hexdec(substr($hexColor, 4, 2)) | |
]; | |
} | |
/** | |
* Generates the QR code and returns it as a string. | |
* | |
* @return string The generated QR code as a string. | |
* @throws ProfessionalException If an error occurs during QR code generation. | |
*/ | |
public function generateQRCode() | |
{ | |
try { | |
$qrCode = new QrCode($this->content); | |
$qrCode->setSize($this->size); | |
$qrCode->setMargin($this->margin); | |
$qrCode->setErrorCorrectionLevel($this->getErrorCorrectionLevel()); | |
$rgbColor = $this->hexToRgb($this->color); | |
$qrCode->setForegroundColor($rgbColor); | |
return $qrCode->writeString(); | |
} catch (\Exception $e) { | |
throw new ProfessionalException($e->getCode(), $e->getMessage()); | |
} | |
} | |
/** | |
* Generates the QR code and returns it as a data URI. | |
* | |
* @return string The generated QR code as a data URI. | |
* @throws ProfessionalException If an error occurs during QR code generation. | |
*/ | |
public function getQRCodeDataUri() | |
{ | |
try { | |
$qrCode = new QrCode($this->content); | |
$qrCode->setSize($this->size); | |
$qrCode->setMargin($this->margin); | |
$qrCode->setErrorCorrectionLevel($this->getErrorCorrectionLevel()); | |
$rgbColor = $this->hexToRgb($this->color); | |
$qrCode->setForegroundColor($rgbColor); | |
return $qrCode->writeDataUri(); | |
} catch (\Exception $e) { | |
throw new ProfessionalException($e->getCode(), $e->getMessage()); | |
} | |
} | |
/** | |
* Outputs the generated QR code directly as a PNG image. | |
*/ | |
public function outputQRCode() | |
{ | |
header('Content-Type: image/png'); | |
echo $this->generateQRCode(); | |
} | |
} |