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<?php |
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declare(strict_types=1); |
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namespace loophp\phptree\Exporter; |
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use Exception; |
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use loophp\phptree\Node\NodeInterface; |
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use const LOCK_EX; |
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use const PHP_OS; |
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/** |
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* Class Image. |
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*/ |
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class Image extends Gv |
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{ |
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/** |
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* @var string |
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*/ |
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private $executable = 'dot'; |
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/** |
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* @var string |
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*/ |
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private $format = 'svg'; |
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/** |
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* Image constructor. |
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*/ |
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public function __construct() |
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{ |
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if (0 === mb_stripos(PHP_OS, 'WIN')) { |
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$this->executable = 'dot.exe'; |
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} |
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} |
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/** |
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* @param \loophp\phptree\Node\NodeInterface $node |
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* |
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* @throws Exception |
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* |
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* @return string |
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*/ |
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public function export(NodeInterface $node): string |
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{ |
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$path = $this->getTemporaryFile(); |
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$this->writeToFile($path, parent::export($node)); |
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system($this->getConvertCommand($path)); |
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return sprintf('%s.%s', $path, $this->getFormat()); |
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} |
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/** |
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* Get the executable to use. |
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* |
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* @return string |
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*/ |
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public function getExecutable(): string |
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{ |
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return $this->executable; |
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} |
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/** |
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* @return string |
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*/ |
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public function getFormat(): string |
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{ |
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return $this->format; |
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} |
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/** |
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* Change the executable to use. |
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* |
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* @param string $executable |
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* |
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* @return \loophp\phptree\Exporter\Image |
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*/ |
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public function setExecutable(string $executable): self |
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{ |
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$this->executable = $executable; |
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return $this; |
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} |
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/** |
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* @param string $format |
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* |
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* @return \loophp\phptree\Exporter\Image |
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*/ |
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public function setFormat(string $format): self |
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{ |
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$this->format = $format; |
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return $this; |
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} |
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/** |
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* @param string $path |
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* |
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* @return string |
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*/ |
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private function getConvertCommand(string $path): string |
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{ |
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return sprintf( |
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'%s -T%s %s -o %s.%s', |
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$this->getExecutable(), |
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$this->getFormat(), |
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$path, |
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$path, |
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$this->getFormat() |
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); |
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} |
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/** |
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* @throws Exception |
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* |
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* @return string |
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*/ |
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private function getTemporaryFile(): string |
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{ |
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$path = tempnam(sys_get_temp_dir(), 'graphviz'); |
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if (false === $path) { |
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throw new Exception('Unable to get temporary file name for graphviz script'); |
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} |
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return $path; |
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} |
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/** |
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* @param string $path |
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* @param string $content |
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* |
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* @throws Exception |
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* |
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* @return bool |
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*/ |
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private function writeToFile(string $path, string $content): bool |
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{ |
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$ret = file_put_contents($path, $content, LOCK_EX); |
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if (false === $ret) { |
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throw new Exception('Unable to write graphviz script to temporary file'); |
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} |
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1 |
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return true; |
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} |
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} |
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loophp /
phptree
