User.swift

//
//  User.swift
//  twitterApp
//
//  Created by Deepak on 9/27/14.
//  Copyright (c) 2014 Deepak. All rights reserved.
//

import UIKit

var _currentUser: User?
let currentUserKey = "kCurrentUserKey"
let userDidLoginNotification = "userDidLoginNotification"
let userDidLogoutNotification = "userDidLogoutNotification"

class User: NSObject {
    var name: String?
    var screenname: String?
    var profileImageUrl: String?
    var tagline: String?
    var dictionary: NSDictionary
    var profileBackgroundImageUrl: String?
    var numTweets: NSNumber?
    var numFollowers: NSNumber?
    var numFollowing: NSNumber?
    
    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
        profileBackgroundImageUrl = dictionary["profile_background_image_url"] as? String
        numTweets = dictionary["statuses_count"] as? NSNumber
        numFollowers = dictionary["friends_count"] as? NSNumber
        numFollowing = dictionary["followers_count"] as? NSNumber
    }
    
    func logout() {
        User.currentUser = nil
        TwitterClient.sharedInstance.requestSerializer.removeAccessToken()
        NSNotificationCenter.defaultCenter().postNotificationName(userDidLogoutNotification, object: nil)
    }
    
    class var currentUser: User? {
        get {
            if _currentUser == nil {
                var data  = NSUserDefaults.standardUserDefaults().objectForKey(currentUserKey) as? NSData
                if data != nil {
                    var dictionary = NSJSONSerialization.JSONObjectWithData(data!, options: nil, error: nil) as NSDictionary
                    _currentUser = User(dictionary: dictionary)
                }
            }
            return _currentUser
        }
        set(user) {
            _currentUser = user

            if _currentUser != nil {
                var data = NSJSONSerialization.dataWithJSONObject(user!.dictionary, options: nil, error: nil)
                NSUserDefaults.standardUserDefaults().setObject(data, forKey: currentUserKey)
                NSUserDefaults.standardUserDefaults().synchronize()
            }
        }
    }

   
}