User.swift

//
//  User.swift
//  Twitter
//
//  Created by user on 2/18/16.
//  Copyright © 2016 Aurielle. All rights reserved.
//

import UIKit

var _currentUser: User?
let currentUserKey = "kCuurentUserKey";
let userDidLoginNotification = "userDidLoginNotification";
let userDidLogoutNotification = "userDidLogoutNotification";


class User: NSObject {
    var name: String?
    var screenname: String?
    var profileImageUrl: String?
    var tagline: String?
    var dictionary: NSDictionary
    
    init(dictionary: NSDictionary) {
        self.dictionary = dictionary
        
        name = dictionary["name"] as? String
        screenname = dictionary["screen_name"] as? String
        profileImageUrl = dictionary["profile_image_url"] as? String
        tagline = dictionary["description"] as? String
        
    }
    
    func logout() {
        User.currentUser = nil
        TwitterClient.sharedInstance.requestSerializer.removeAccessToken()
        NSNotificationCenter.defaultCenter().postNotificationName(userDidLogoutNotification, object: nil)
    }
    
    class var currentUser: User? {
        
        get {
        if _currentUser == nil {
        //logged out or just boot up
        let data = NSUserDefaults.standardUserDefaults().objectForKey(currentUserKey) as? NSData
        if data != nil {
        let dictionary: NSDictionary?
        do {
        try dictionary = NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary
        _currentUser = User(dictionary: dictionary!)
    } catch {
        print(error)
        }
        }
        }
        return _currentUser
        }
        //please
        
        
        set(user) {
            _currentUser = user
            //User need to implement NSCoding; but, JSON also serialized by default
            if let _ = _currentUser {
                var data: NSData?
                do {
                    try data = NSJSONSerialization.dataWithJSONObject(user!.dictionary, options: .PrettyPrinted)
                    NSUserDefaults.standardUserDefaults().setObject(data, forKey: currentUserKey)
                } catch {
                    print(error)
                }
            } else {
                //Clear the currentUser data
                NSUserDefaults.standardUserDefaults().setObject(nil, forKey: currentUserKey)
            }
        }
    }


}