<?php

namespace Assetic\Asset;

use Assetic\Filter\FilterCollection;
use Assetic\Filter\FilterInterface;

/**
 * A base abstract asset.
 *
 * The methods load() and getLastModified() are left undefined, although a
 * reusable doLoad() method is available to child classes.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
abstract class BaseAsset implements AssetInterface
{
	private $filters;
	private $sourceRoot;
	private $sourcePath;
	private $targetPath;
	private $content;
	private $loaded;


	/**
	 * Constructor.
	 *
	 * @param array $filters Filters for the asset
	 */
	public function __construct($filters = array(), $sourceRoot = null, $sourcePath = null)
	{
		$this->filters = new FilterCollection($filters);
		$this->sourceRoot = $sourceRoot;
		$this->sourcePath = $sourcePath;
		$this->loaded = false;
	}


	public function __clone()
	{
		$this->filters = clone $this->filters;
	}


	public function ensureFilter(FilterInterface $filter)
	{
		$this->filters->ensure($filter);
	}


	public function getFilters()
	{
		return $this->filters->all();
	}


	public function clearFilters()
	{
		$this->filters->clear();
	}


	/**
	 * Encapsulates asset loading logic.
	 *
	 * @param string          $content          The asset content
	 * @param FilterInterface $additionalFilter An additional filter
	 */
	protected function doLoad($content, FilterInterface $additionalFilter = null)
	{
		$filter = clone $this->filters;
		if ($additionalFilter) {
		    $filter->ensure($additionalFilter);
		}

		$asset = clone $this;
		$asset->setContent($content);

		$filter->filterLoad($asset);
		$this->content = $asset->getContent();

		$this->loaded = true;
	}


	public function dump(FilterInterface $additionalFilter = null)
	{
		if (!$this->loaded) {
		    $this->load();
		}

		$filter = clone $this->filters;
		if ($additionalFilter) {
		    $filter->ensure($additionalFilter);
		}

		$asset = clone $this;
		$filter->filterDump($asset);

		return $asset->getContent();
	}


	public function getContent()
	{
		return $this->content;
	}


	public function setContent($content)
	{
		$this->content = $content;
	}


	public function getSourceRoot()
	{
		return $this->sourceRoot;
	}


	public function getSourcePath()
	{
		return $this->sourcePath;
	}


	public function getTargetPath()
	{
		return $this->targetPath;
	}


	public function setTargetPath($targetPath)
	{
		$this->targetPath = $targetPath;
	}
}
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