package com.yourmajesty.services
{
	import com.yourmajesty.async.*;
	import flash.events.*;
	import flash.net.*;
	
	/**
	 * Simple form submission using GET or POST and URL-encoded variables.
	 * Send the keys/values in an Object.
	 * Get back a token which will populate with the result.
	 * Extend this class and override extractFunction() to interpret the results differently.
	 * You may also extend this class adding public static constants for the URLs of your services,
	 * a la event names in Event subclasses.
	 * @author Roger Braunstein 2007
	 */
	public class FormSubmitter
	{
		public function send(url:String, hash:Object, method:String = URLRequestMethod.POST):IAsynchronousToken
		{
			var vars:URLVariables = new URLVariables();
			for (var key:String in hash)
			{
				vars[key] = hash[key];
			}
			
			var request:URLRequest = new URLRequest();
			request.url = url;
			request.method = method;
			request.data = vars;
			
			var loader:URLLoader = new URLLoader();
			loader.dataFormat = URLLoaderDataFormat.VARIABLES;
			
			try {
				loader.load(request);
			} catch (error:Error) {
				var t:AsynchronousToken = new AsynchronousToken(this, error);
				return t;
			}
			return new AsynchronousToken(loader, null, Event.COMPLETE, [IOErrorEvent.IO_ERROR, SecurityErrorEvent.SECURITY_ERROR], extractFunction);
		}
		
		protected function extractFunction(event:Event):*
		{
			return (event.target as URLLoader).data;
		}
		
	}
}