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<?php |
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declare(strict_types=1); |
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namespace Benrowe\Fqcn; |
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use Benrowe\Fqcn\Value\Psr4Namespace; |
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/** |
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* PathBuilder |
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* |
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* Build a path based on a namespace and the directory it's mapped to |
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* |
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* @package Benrowe\Fqcn |
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*/ |
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class PathBuilder |
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{ |
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private $namespace; |
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private $path; |
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/** |
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* Constructor |
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* Take in the path & the psr4 namespace it represents |
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* |
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* @param string $path absolute path |
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* @param Psr4Namespace $namespace namespace that represents the provided |
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* path |
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*/ |
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public function __construct(string $path, Psr4Namespace $namespace) |
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{ |
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if (!is_dir($path)) { |
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throw new Exception('Invalid path'); |
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} |
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$this->namespace = $namespace; |
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$this->path = $path; |
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} |
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/** |
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* Get the absolute directory of the provided namespace, relative to the initial |
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* path/namespace |
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* |
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* @param Psr4Namespace $namespace The namespace you want the directory for |
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* @return string the absolute directory path, empty if it does not exist! |
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*/ |
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public function resolve(Psr4Namespace $namespace): string |
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{ |
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if (!$namespace->startsWith($this->namespace)) { |
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throw new Exception( |
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$namespace->getValue() . ' is not from the same base as ' . |
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$this->namespace->getValue() |
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); |
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} |
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$relFqn = substr($namespace->getValue(), strlen($this->namespace->getValue())); |
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$relPath = $this->nsToPath($relFqn); |
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$absPath = realpath($this->path . DIRECTORY_SEPARATOR . $relPath); |
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return $absPath ?: ''; |
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} |
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/** |
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* Convert a namespace to a path equivilent. |
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* |
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* @param string $namespace |
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* @return string |
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*/ |
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private function nsToPath(string $namespace): string |
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{ |
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return trim(strtr($namespace, [ |
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'\\' => DIRECTORY_SEPARATOR, |
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'//' => DIRECTORY_SEPARATOR |
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]), '\\/'); |
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} |
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} |
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benrowe /
fqcn
