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<?php
/**
* Copyright (c) 2009-2016 Arne Blankerts <arne@blankerts.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Arne Blankerts nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT * NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER ORCONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package Autoload
* @author Arne Blankerts <arne@blankerts.de>
* @copyright Arne Blankerts <arne@blankerts.de>, All rights reserved.
* @license BSD License
*/
namespace TheSeer\Autoload {
/**
* Sorting classes by depdendency for static requires
*
* @author Arne Blankerts <arne@blankerts.de>
* @copyright Arne Blankerts <arne@blankerts.de>, All rights reserved.
*/
class ClassDependencySorter {
private $classList;
private $dependencies;
private $level;
private $sorted = array();
public function __construct(Array $classes, Array $dependencies) {
$this->classList = $classes;
$this->dependencies = $dependencies;
}
public function process() {
$this->level = 0;
foreach($this->classList as $class => $file) {
if (!in_array($class, $this->sorted)) {
$this->resolve($class);
}
}
$res = array();
foreach($this->sorted as $class) {
if (!isset($this->classList[$class])) {
continue;
}
$res[$class] = $this->classList[$class];
}
return $res;
}
private function resolve($class) {
$this->level++;
if ($this->level == 50) {
throw new ClassDependencySorterException("Can't resolve more than 50 levels of dependencies", ClassDependencySorterException::TooManyDependencyLevels);
}
if (isset($this->dependencies[$class])) {
foreach($this->dependencies[$class] as $depclass) {
if (!in_array($depclass, $this->sorted)) {
$this->resolve($depclass);
}
}
}
$this->sorted[] = $class;
$this->level--;
}
}
class ClassDependencySorterException extends \Exception {
const TooManyDependencyLevels = 1;
}
}