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<?php |
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/** |
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* Class QROutputAbstract |
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* |
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* @created 09.12.2015 |
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* @author Smiley <[email protected]> |
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* @copyright 2015 Smiley |
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* @license MIT |
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*/ |
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namespace chillerlan\QRCode\Output; |
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use chillerlan\QRCode\Data\QRMatrix; |
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use chillerlan\Settings\SettingsContainerInterface; |
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use function base64_encode, dirname, file_put_contents, is_writable, sprintf; |
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/** |
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* common output abstract |
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*/ |
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abstract class QROutputAbstract implements QROutputInterface{ |
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/** |
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* the current size of the QR matrix |
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* |
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* @see \chillerlan\QRCode\Data\QRMatrix::size() |
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*/ |
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protected int $moduleCount; |
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/** |
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* the current scaling for a QR pixel |
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* |
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* @see \chillerlan\QRCode\QROptions::$scale |
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*/ |
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protected int $scale; |
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/** |
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* the side length of the QR image (modules * scale) |
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*/ |
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protected int $length; |
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/** |
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* an (optional) array of color values for the several QR matrix parts |
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*/ |
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protected array $moduleValues; |
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/** |
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* the (filled) data matrix object |
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*/ |
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protected QRMatrix $matrix; |
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/** |
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* @var \chillerlan\Settings\SettingsContainerInterface|\chillerlan\QRCode\QROptions |
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*/ |
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protected SettingsContainerInterface $options; |
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/** |
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* QROutputAbstract constructor. |
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*/ |
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public function __construct(SettingsContainerInterface $options, QRMatrix $matrix){ |
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$this->options = $options; |
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$this->matrix = $matrix; |
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$this->moduleCount = $this->matrix->size(); |
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$this->scale = $this->options->scale; |
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$this->length = $this->moduleCount * $this->scale; |
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$this->setModuleValues(); |
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} |
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/** |
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* Sets the initial module values |
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*/ |
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protected function setModuleValues():void{ |
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foreach($this::DEFAULT_MODULE_VALUES as $M_TYPE => $defaultValue){ |
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$value = $this->options->moduleValues[$M_TYPE] ?? null; |
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$this->moduleValues[$M_TYPE] = $this->moduleValueIsValid($value) |
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? $this->getModuleValue($value) |
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: $this->getDefaultModuleValue($defaultValue); |
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} |
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} |
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/** |
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* Determines whether the given value is valid |
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* |
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* @param mixed|null $value |
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*/ |
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abstract protected function moduleValueIsValid($value):bool; |
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/** |
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* Returns the final value for the given input (return value depends on the output module) |
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* |
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* @param mixed $value |
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* |
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* @return mixed |
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*/ |
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abstract protected function getModuleValue($value); |
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/** |
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* Returns a defualt value for either dark or light modules (return value depends on the output module) |
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* |
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* @return mixed |
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*/ |
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abstract protected function getDefaultModuleValue(bool $isDark); |
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/** |
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* Returns a base64 data URI for the given string and mime type |
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*/ |
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protected function base64encode(string $data, string $mime):string{ |
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return sprintf('data:%s;base64,%s', $mime, base64_encode($data)); |
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} |
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/** |
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* saves the qr data to a file |
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* |
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* @see file_put_contents() |
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* @see \chillerlan\QRCode\QROptions::cachefile |
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* |
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException |
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*/ |
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protected function saveToFile(string $data, string $file):void{ |
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if(!is_writable(dirname($file))){ |
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throw new QRCodeOutputException(sprintf('Cannot write data to cache file: %s', $file)); |
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} |
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if(file_put_contents($file, $data) === false){ |
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throw new QRCodeOutputException(sprintf('Cannot write data to cache file: %s (file_put_contents error)', $file)); |
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} |
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} |
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} |
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chillerlan /
php-qrcode
