FbWrap.Swift

//
//  FacebookSocialMediaManager.swift
//  
//
//  Created by Erison Veshi<Bashta> on 2/25/16.
//

import FBSDKCoreKit
import FBSDKLoginKit
import Parse

final class FacebookSocialMediaManager {
    static let sharedInstance = FacebookSocialMediaManager()
}

extension FacebookSocialMediaManager {

    func logInWithFacebook(controler: UIViewController, completion:(success:Bool, error: NSError?) -> ()) {
        let loginManager = FBSDKLoginManager()
        loginManager.logInWithReadPermissions(["public_profile", "email"], fromViewController: controler) { results, error in
            if let error = error {
                completion(success: false, error: error)
            }

            FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "name, gender,email"]).startWithCompletionHandler({ connection, result, error in
                guard let resultDictionary = result as? Dictionary<String, AnyObject>,
                      let name = resultDictionary["name"] as? String,
                      let email = resultDictionary["email"] as? String else {
                        completion(success: false, error: error)
                        return
                }

                PFUser.logInWithUsernameInBackground(email, password: email, block: { user, error in
                    if let error = error {
                        //invalid login parameters
                        if error.code == 101 {
                            //Register and signup a new user
                            let newUser = PFUser()
                            newUser.username = email
                            newUser.password = email

                            newUser.signUpInBackgroundWithBlock({ success, error in
                                newUser.setValue(true, forKey: GlobalConstants.ParseKeys.isFacebookAutenticated)
                                newUser.setObject(name, forKey: GlobalConstants.ParseKeys.UserNameKey)
                                newUser.saveInBackground()
                                completion(success: success, error: error)
                            })
                        }
                    }

                    completion(success: true, error: error)
                })
            })
        }
    }

    func logOutFromFacebook() {
        let loginManager = FBSDKLoginManager()
        loginManager.logOut()
    }
}