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<?php

/**
 * Class DirFileLister
 */
class DirFileLister
{

	protected $dir;
	protected $currentList;

	/**
	 * DirFileLister constructor.
	 * @param string $dir
	 */
	public function __construct($dir = __DIR__)
	{
		$this->setDir($dir);
		$this->scan();
	}

	/**
	 * @param string $dir
	 */
	public function setDir($dir)
	{
		$this->dir = $dir;
	}

	public function scan()
	{
		$this->clearList();
		$items = scandir($this->dir);
		if (!$items) return;
		foreach ($items as $item) {
			if (in_array($item, ['.'])) continue;
			if (is_dir(__DIR__.'/'.$item)) {
				$this->addDir($item);
				continue;
			}
			if (is_file(__DIR__.'/'.$item)) {
				$this->addFile($item);
			}
		}
	}

	/**
	 * @return array
	 */
	public function getDirs()
	{
		return $this->currentList['dirs'];
	}

	/**
	 * @return array
	 */
	public function getFiles()
	{
		return $this->currentList['files'];
	}

	/**
	 * @return array
	 */
	public function getDirsWithLinks()
	{
		$dirs = $this->getDirs();
		foreach ($dirs as $key => $dir) {
			$dirs[$key] = $this->makeLink($dir);
		}
		return $dirs;
	}

	/**
	 * @return array
	 */
	public function getFilesWithLinks()
	{
		$files = $this->getFiles();
		foreach ($files as $key => $file) {
			if (preg_match('/.*\.((php)|(htm)|(html))$/i', $file)) {
				$files[$key] = $this->makeLink($file);
			}
		}
		return $files;
	}

	protected function clearList()
	{
		$this->clearDirs();
		$this->clearFiles();
	}

	protected function clearDirs()
	{
		$this->currentList['dirs'] = [];
	}

	protected function clearFiles()
	{
		$this->currentList['files'] = [];
	}

	protected function addDir($item)
	{
		$this->currentList['dirs'][] = $item;
	}

	protected function addFile($item)
	{
		$this->currentList['files'][] = $item;
	}

	/**
	 * @param string $item
	 * @return string
	 */
	protected function makeLink($item)
	{
		return '<a href="'.$item.'">'.$item.'</a>';
	}
}

$lister = new DirFileLister();

foreach ($lister->getDirsWithLinks() as $item) {
	echo $item.'<br/>';
}
foreach ($lister->getFilesWithLinks() as $item) {
	echo $item.'<br/>';
}