Generátor statických do cache

fileCacheGenerator.php

<?php

class fileCacheGenerator {
	private $sourceDir;
	private $cacheDir;
	private $cacheUrl;

	public function __construct( $sourceDir, $cacheDir, $cacheUrl ) {
		$this->sourceDir = $sourceDir;
		$this->cacheDir = $cacheDir;
		$this->cacheUrl = $cacheUrl;
	}

	public function getFileUrl( $file ) {
		if( ! file_exists( $this->sourceDir . $file ) ) {
			throw new fileCacheGeneratorException("Source file $file doensn't exist.", 1);
		}

		$hash = getFileHash( $this->sourceDir . $file );
		$extension = "." . pathinfo($path, PATHINFO_EXTENSION);

		$cachedFile = $file . $extension;

		if( ! file_exists( $this->cacheDir . '/' . $cachedFile ) ) {
			$content = $this->generate( $this->sourceDir . $file );
			if( ! file_put_contents( $this->cacheDir . '/' . $cachedFile, $content ) ) {
				throw new fileCacheGeneratorException("Unable to write file $cachedFile to $this->cacheDir, is directory exists?", 1);
			}
		}
		return $this->cacheUrl . '/' . $cachedFile;
	}

	private function getFileHash( $file ) {
		$lastModified = filemtime( $file );
		return md5( $file . $lastModified );
	}

	private function generate( $sourceFile ) {
		//tady se napište nějaký kód, který bude do cache generovat a vracet obsah souboru
	}
}

class fileCacheGeneratorException extends Exception {}