ActionScript 3 AS3：Facebook身份验证类

Posted 2021-05-23

package com.chrisaiv
{
	import com.facebook.events.FacebookEvent;
	import com.facebook.utils.FacebookSessionUtil;
	
	import flash.events.Event;
	import flash.events.EventDispatcher;
	
	import mx.controls.Alert;

	public class FBAuthenticate extends EventDispatcher
	{
		private var session:FacebookSessionUtil;

		private var _currentMethod:Function;
		
		public function FBAuthenticate( fbSession:FacebookSessionUtil, func:Function )
		{			
			_currentMethod = func;
			
			session = fbSession;
			session.addEventListener( FacebookEvent.WAITING_FOR_LOGIN, fbWaitingForLoginHandler, false, 0, true );
			session.addEventListener( FacebookEvent.CONNECT, fbOnConnectHandler, false, 0, true );
			session.login();
		}

		/**************************************
		 * Facebook Connect/Login Event Handlers
		**************************************/
		private function fbOnConnectHandler( e:FacebookEvent ):void
		{
			//Continue where the user last left off before requiring Authentication
			dispatchEvent( new Event( Event.COMPLETE ) );
		}
		
		private function fbWaitingForLoginHandler( e:FacebookEvent ):void
		{
			showAlert( "Click OK after you've logged in", "Logging In" );
		}			
		
		private function fbValidateLogin( e:Event ):void
		{
			session.validateLogin();
		}
		
		/**************************************
		 * Alert
		**************************************/
		private function showAlert( message:String, header:String ):void
		{
			//The user has returned from the log-in page and are now clicking "OK"
			var alert:Alert = Alert.show( message, header );
				alert.addEventListener( Event.CLOSE, fbValidateLogin, false, 0, true );				
				alert.addEventListener( Event.CLOSE, alertCloseHandler, false, 0, true );				
		}
		
		private function alertCloseHandler( e:Event ):void
		{
			
		}
		
		/**************************************
		 * Getters / Setters
		**************************************/
		public function get currentMethod():Function
		{
			return _currentMethod;
		}		
		
	}
}


/**************************
* This belongs outside of the class
**************************/

private function isAuthenticated():Boolean
{
	if( fbSession == null || !fbSession.facebook.is_connected ){
		return false;
	}
	return true;
}

private function fbGoAuthenticate( method:Function ):void
{
	fbAuthenticate = new FBAuthenticate( fbSession, method );					
	fbAuthenticate.addEventListener( Event.COMPLETE, fbAuthenticateComplete, false, 0, true );				
}

private function fbAuthenticateComplete( e:Event ):void
{
	updateStatus( "You are logged into Facebook" );

	var currentMethod:Function = FBAuthenticate(e.currentTarget).currentMethod;
	//Continue where the User Last Left Off
	currentMethod();
}
private function getPhotoAlbums():void
{	
	//-- AUTHENTICATE USER: Force USER to Login() Before calling FB API
	if( !isAuthenticated() ){ fbGoAuthenticate( arguments.callee ); return; } 
	
	var call:FacebookCall = fbook.post( new GetAlbums( fbook.uid ) );
		call.addEventListener( FacebookEvent.COMPLETE, photoAlbumsCompleteHandler, false, 0, true );					
}

private function photoAlbumsCompleteHandler( e:FacebookEvent ):void
{
	var albumsResponseData:GetAlbumsData = e.data as GetAlbumsData;
}