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<?php |
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namespace RobbieP\ZbarQrdecoder; |
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use RobbieP\ZbarQrdecoder\Result\AbstractResult; |
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use RobbieP\ZbarQrdecoder\Result\ErrorResult; |
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use RobbieP\ZbarQrdecoder\Result\Parser\ParserXML; |
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use RobbieP\ZbarQrdecoder\Result\Result; |
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use RobbieP\ZbarQrdecoder\Result\ResultCollection; |
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use Symfony\Component\Process\Exception\ProcessFailedException; |
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use Symfony\Component\Process\ProcessBuilder; |
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class ZbarDecoder |
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{ |
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const EXECUTABLE = 'zbarimg'; |
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private $path; |
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private $filePath; |
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/** |
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* @var AbstractResult|ResultCollection |
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*/ |
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private $result; |
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/** |
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* @var ProcessBuilder |
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*/ |
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private $processBuilder; |
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/** |
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* @param array $config |
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* @param ProcessBuilder $processBuilder |
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*/ |
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public function __construct(array $config = [], $processBuilder = null) |
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{ |
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if (isset($config['path'])) { |
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$this->setPath($config['path']); |
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} |
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$this->processBuilder = null === $processBuilder ? new ProcessBuilder() : $processBuilder; |
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} |
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/** |
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* Main constructor - builds the process, runs it then returns the Result object |
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* |
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* @param $filename |
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* |
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* @return AbstractResult |
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* @throws \Exception |
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*/ |
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public function make($filename) |
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{ |
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$this->setFilePath($filename); |
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$this->buildProcess(); |
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$this->runProcess(); |
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return $this->output(); |
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} |
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/** |
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* Returns the path to the executable zbarimg |
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* Defaults to /usr/bin |
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* |
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* @throws \Exception |
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* @return mixed |
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*/ |
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public function getPath() |
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{ |
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if (!$this->path) { |
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$this->setPath('/usr/bin'); |
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} |
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return $this->path; |
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} |
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/** |
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* @param mixed $path |
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*/ |
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public function setPath($path) |
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{ |
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$this->path = rtrim($path, '/'); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getFilePath() |
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{ |
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return $this->filePath; |
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} |
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/** |
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* @param mixed $filePath |
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* |
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* @throws \Exception |
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*/ |
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public function setFilePath($filePath) |
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{ |
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if (!is_file($filePath)) { |
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throw new \RuntimeException('Invalid filepath given'); |
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} |
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$this->filePath = $filePath; |
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} |
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/** |
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* Builds the process |
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* TODO: Configurable arguments |
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* |
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* @throws \Exception |
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*/ |
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private function buildProcess() |
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{ |
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$path = $this->getPath(); |
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$this->processBuilder->setPrefix($path . DIRECTORY_SEPARATOR . static::EXECUTABLE); |
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$this->processBuilder->setArguments(['-D', '--xml', '-q', $this->getFilePath()])->enableOutput(); |
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} |
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/** |
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* Runs the process |
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* |
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* @throws \Exception |
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*/ |
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private function runProcess() |
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{ |
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$process = $this->processBuilder->getProcess(); |
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try { |
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$process->mustRun(); |
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$parser = new ParserXML(); |
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$result = $parser->parse($process->getOutput()); |
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if (count($result) === 1) { |
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$result = $result->getResults()[0]; |
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} |
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$this->result = $result; |
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} catch (ProcessFailedException $e) { |
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switch ($e->getProcess()->getExitCode()) { |
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case 1: |
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throw new \RuntimeException('An error occurred while processing the image. It could be bad arguments, I/O errors and image handling errors from ImageMagick'); |
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case 2: |
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throw new \RuntimeException('ImageMagick fatal error'); |
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case 4: |
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$this->result = new ErrorResult('No barcode detected'); |
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break; |
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default: |
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throw new \RuntimeException('Problem with decode - check you have zbar-tools installed'); |
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} |
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} |
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} |
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/** |
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* Only return the output class to the end user |
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* |
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* @return AbstractResult|ResultCollection |
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*/ |
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private function output() |
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{ |
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return $this->result; |
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} |
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} |
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robbiepaul /
zbar-qrdecoder
