CoalescingDirectoryResource.php

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<?php
 
/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2014 OpenSky Project Inc
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
 
namespace Assetic\Factory\Resource;
 
class CoalescingDirectoryResource implements IteratorResourceInterface
{
    private $directories;
 
    public function __construct($directories)
    {
        $this->directories = array();
 
        foreach ($directories as $directory) {
            $this->addDirectory($directory);
        }
    }
 
    public function addDirectory(IteratorResourceInterface $directory)
    {
        $this->directories[] = $directory;
    }
 
    public function isFresh($timestamp)
    {
        foreach ($this->getFileResources() as $file) {
            if (!$file->isFresh($timestamp)) {
                return false;
            }
        }
 
        return true;
    }
 
    public function getContent()
    {
        $parts = array();
        foreach ($this->getFileResources() as $file) {
            $parts[] = $file->getContent();
        }
 
        return implode("\n", $parts);
    }
 
    public function __toString()
    {
        $parts = array();
        foreach ($this->directories as $directory) {
            $parts[] = (string) $directory;
        }
 
        return implode(',', $parts);
    }
 
    public function getIterator()
    {
        return new \ArrayIterator($this->getFileResources());
    }
 
    protected function getRelativeName(ResourceInterface $file, ResourceInterface $directory)
    {
        return substr((string) $file, strlen((string) $directory));
    }
 
    private function getFileResources()
    {
        $paths = array();
 
        foreach ($this->directories as $directory) {
            foreach ($directory as $file) {
                $relative = $this->getRelativeName($file, $directory);
 
                if (!isset($paths[$relative])) {
                    $paths[$relative] = $file;
                }
            }
        }
 
        return array_values($paths);
    }
}