<?php
namespace gnomephp\cache;
/**
 * Used to cache views.
 * 
 * @author peec
 *
 */
class ViewCache{
	
	private $viewName;
	private $suffix;
	private $cachePath;
	private $urlAppendix;
	
	/**
	 * Constructs a view cache object.
	 * @param string $viewName The view name ( relative or absolute path )
	 * @param string $suffix File extension
	 * @param string $cachePath Where to store cache files.
	 * @param string $urlAppendix Salt or url appendix.
	 */
	public function __construct($viewName, $suffix, $cachePath, $urlAppendix){
		$this->viewName = $viewName;
		$this->suffix = $suffix;
		$this->cachePath = $cachePath;
		$this->urlAppendix = $urlAppendix;
			
	}
	
	/**
	 * Gets the cache path ( can be both absolute and non-absolute )
	 */
	public function getViewName(){
		return $this->viewName;
	}
	
	/**
	 * Gets the suffix ( file extension ) of the cache file.
	 */
	public function getSuffix(){
		return $this->suffix;
	}
	/**
	 * Gets the cache path.
	 */
	public function getCachePath(){
		return $this->cachePath;
	}
	
	/**
	 * Gets the salt of the cache file.
	 */
	public function getUrlAppendix(){
		return $this->urlAppendix;
	}
	
	/**
	 * Gets the cache file name
	 */
	public function getCacheFile(){
		return (string)($this->cachePath . DIRECTORY_SEPARATOR . md5((string)$this->urlAppendix). '_' . md5($this->viewName) . $this->suffix);
	}
	
	/**
	 * Puts content into this file.
	 * Contents are overridden.
	 * @param string $content The content to put in the file.
	 */
	public function put($content){
		return file_put_contents($this->getCacheFile(), $content);
	}
	/**
	 * Appends content to the cached file.
	 * @param string $content The content to append to the file.
	 */
	public function append($content){
		return file_put_contents($this->getCacheFile(), $content, FILE_APPEND);
	}
	/**
	 * Prepends content to the file.
	 * @param string $content The content to prepend to the file.
	 */
	public function prepend($content){
		return file_put_contents($this->getCacheFile(), @file_get_contents($this->getCacheFile()) . $content);
	}
	/**
	 * Delets the cache file.
	 */
	public function delete(){
		return @unlink($this->getCacheFile());
	}
	
	
}