package com
{
	import flash.events.Event;
	import flash.events.IOErrorEvent;
	import flash.filesystem.File;
	import flash.filesystem.FileMode;
	import flash.filesystem.FileStream;
	import flash.net.URLLoader;
	import flash.net.URLLoaderDataFormat;
	import flash.net.URLRequest;
	import flash.utils.ByteArray;

	public class CacheImage {
	    private var loader:URLLoader = new URLLoader();  
	    private var fileName:String; 
	    private var file:File;
	    
	    public var imageProperty:String;
	    
	    public function CacheImage(url:String, name:String, destination:File, defaultImage:String):void {
		    loader.dataFormat = URLLoaderDataFormat.BINARY;
		    loader.addEventListener(Event.COMPLETE, onLoad);
		    imageProperty = defaultImage;
		    fileName = name;
		    file = destination;
		    loader.load(new URLRequest(url));
	    }

	    private function onLoad(event:Event):void {
		imageProperty = file.nativePath;
		saveLocally(fileName, loader.data);
	    } 

	    private function saveLocally(fileName:String, data:ByteArray):void {
		//create a file under the application storage directory using the filename argument
		if (file.exists) {
		    file.deleteFile(); 
		}
		var fileStream:FileStream = new FileStream();
		fileStream.open(file, FileMode.WRITE);
		fileStream.writeBytes(data, 0, data.length);
		fileStream.close();
	    }
	}
}