CelerityResourcesOnDisk.php
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	<?php

	/**
	* Defines the location of static resources on disk.
	*/
	abstract class CelerityResourcesOnDisk extends CelerityPhysicalResources {

	abstract public function getPathToResources();

	private function getPathToResource($name) {
	return $this->getPathToResources().DIRECTORY_SEPARATOR.$name;
	}

	public function getResourceData($name) {
	return Filesystem::readFile($this->getPathToResource($name));
	}

	public function findBinaryResources() {
	return $this->findResourcesWithSuffixes($this->getBinaryFileSuffixes());
	}

	public function findTextResources() {
	return $this->findResourcesWithSuffixes($this->getTextFileSuffixes());
	}

	public function getResourceModifiedTime($name) {
	return (int)filemtime($this->getPathToResource($name));
	}

	protected function getBinaryFileSuffixes() {
	return array(
	'png',
	'jpg',
	'gif',
	'swf',
	'svg',
	'woff',
	'woff2',
	'ttf',
	'eot',
	'mp3',
	);
	}

	protected function getTextFileSuffixes() {
	return array(
	'js',
	'css',
	);
	}

	private function findResourcesWithSuffixes(array $suffixes) {
	$root = $this->getPathToResources();

	$finder = id(new FileFinder($root))
	->withType('f')
	->withFollowSymlinks(true)
	->setGenerateChecksums(true);

	foreach ($suffixes as $suffix) {
	$finder->withSuffix($suffix);
	}

	$raw_files = $finder->find();

	$results = array();
	foreach ($raw_files as $path => $hash) {
	$readable = Filesystem::readablePath($path, $root);
	$results[$readable] = $hash;
	}

	return $results;
	}

	}