<?php

namespace ScriptCompiler;

class PathManager {

protected $aliases = array();

protected $docRoot;

public function __construct($aliasMap = array(), $documentRoot = null) {

$this->addAliasMap($aliasMap);

$this->setDocumentRoot($documentRoot);

}

public function addAliasMap($map) {

foreach ($map as $alias => $path) {

$check = realpath($path);

if (!$check) throw new \Exception("Alias path does not exist: {$path}");

$this->aliases[$alias] = $check;

}

}

public function setDocumentRoot($path) {

if (!$path) $path = $_SERVER["DOCUMENT_ROOT"];

// $this->docRoot = realpath($path);

$this->docRoot = $path;

if (!$this->docRoot) {

throw new \Exception("Document root is not a valid path: {$path}");

}

}

public function getPath($url) {

foreach ($this->aliases as $alias => $path) {

if (strpos($url, $alias) !== 0) continue;

return $path . basename($url);

}

return $this->docRoot . $url;

}

}