AphrontURIMapper.php
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	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	/**
	* @group aphront
	*/
	final class AphrontURIMapper {

	private $map;

	final public function __construct(array $map) {
	$this->map = $map;
	}

	final public function mapPath($path) {
	$map = $this->map;
	foreach ($map as $rule => $value) {
	list($controller, $data) = $this->tryRule($rule, $value, $path);
	if ($controller) {
	foreach ($data as $k => $v) {
	if (is_numeric($k)) {
	unset($data[$k]);
	}
	}
	return array($controller, $data);
	}
	}

	return array(null, null);
	}

	final private function tryRule($rule, $value, $path) {
	$match = null;
	$pattern = '#^'.$rule.(is_array($value) ? '' : '$').'#';
	if (!preg_match($pattern, $path, $match)) {
	return array(null, null);
	}

	if (!is_array($value)) {
	return array($value, $match);
	}

	$path = substr($path, strlen($match[0]));
	foreach ($value as $srule => $sval) {
	list($controller, $data) = $this->tryRule($srule, $sval, $path);
	if ($controller) {
	return array($controller, $data + $match);
	}
	}

	return array(null, null);
	}
	}