PSR4Namespace.php
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PSR4Namespace.php
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	<?php
	declare(strict_types=1);

	namespace Keruald\OmniTools\Registration\PSR4;

	use Keruald\OmniTools\IO\Directory;
	use Keruald\OmniTools\IO\File;

	class PSR4Namespace {

	public function __construct (
	public string $namespacePrefix,
	public string $baseDirectory,
	) {
	}

	///
	/// Auto-discovery
	///

	/**
	* Discover classes in the namespace folder following PSR-4 convention,
	* directly at top-level, ignoring subdirectories.
	*
	* @see discoverRecursive
	* @return string[]
	*/
	public function discover () : array {
	$files = (new Directory($this->baseDirectory))
	->glob("*.php");

	return array_map(function (File $file) {
	return $this->namespacePrefix
	. "\\" . $file->getFileNameWithoutExtension();
	}, $files);
	}

	/**
	* Discover classes in the namespace folder following PSR-4 convention,
	* including all subfolders.
	*
	* @return string[]
	*/
	public function discoverRecursive () : array {
	$classes = $this->discover();

	$subDirectories = (new Directory($this->baseDirectory))
	->getSubdirectories();

	foreach ($subDirectories as $dir) {
	$ns = new PSR4Namespace(
	$this->namespacePrefix . "\\" . $dir->getDirectoryName(),
	$dir->getPath(),
	);

	array_push($classes, ...$ns->discoverRecursive());
	}

	return $classes;
	}

	/**
	* Discover classes for a specific namespace in a specific folder,
	* following the PSR-4 convention, including all subfolders.
	*
	* @return string[]
	*/
	public static function discoverAllClasses (
	string $namespacePrefix,
	string $baseDirectory
	) : array {
	$ns = new PSR4Namespace($namespacePrefix, $baseDirectory);
	return $ns->discoverRecursive();
	}

	}