<?php

namespace Assetic\Factory\Resource;

/**
 * Coalesces multiple directories together into one merged resource.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
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);
	}


	/**
	 * Returns a string to uniquely identify the current resource.
	 *
	 * @return string An identifying string
	 */
	public function __toString()
	{
		$parts = array();
		foreach ($this->directories as $directory) {
		    $parts[] = (string) $directory;
		}

		return implode(',', $parts);
	}


	public function getIterator()
	{
		return new \ArrayIterator($this->getFileResources());
	}


	/**
	 * Returns the relative version of a filename.
	 *
	 * @param ResourceInterface $file      The file
	 * @param ResourceInterface $directory The directory
	 *
	 * @return string The name to compare with files from other directories
	 */
	protected function getRelativeName(ResourceInterface $file, ResourceInterface $directory)
	{
		return substr((string) $file, strlen((string) $directory));
	}


	/**
	 * Performs the coalesce.
	 *
	 * @return array An array of file resources
	 */
	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);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODk5OTA0MTEwMzcwNTU5NSAyNjA3NTgwMjY1NzA5NTY0IDUxMjQzMjM4NDA0ODIzNzM=