Geofence Core Location and Beacon Integration

GeofenceViewController

//
//  GeofenceViewController.swift
//  AppleHomeKit
//
//  Created by Ankit Thakur on 2/23/15.
//  Copyright (c) 2015 Ankit Thakur. All rights reserved.
//

import UIKit
import CoreLocation;

@objc protocol GeofenceViewControllerDelegate:NSObjectProtocol {
    
    optional func deviceDidUpdateSignificantLocation(center: CLLocationCoordinate2D)
    optional func deviceDidUpdatePreciseLocation(center: CLLocationCoordinate2D)
    optional func didEnterTagRegion(tagID: String)
    optional func didExitTagRegion(tagID: String)
    optional func didEnterBeaconRegion();
    optional func didExitBeaconRegion();
}

class GeofenceViewController: NSObject,CLLocationManagerDelegate {
    
    var locationManager:CLLocationManager = CLLocationManager();
    var geofenceBeacon:CLBeaconRegion?;
    var isEnteredInBeaconRegion = false;
    var geofenceDelegate:GeofenceViewControllerDelegate?;
    
    // singleton
    class var sharedInstance: GeofenceViewController {
        struct Static {
            static var instance: GeofenceViewController?
            static var token: dispatch_once_t = 0
        }
        
        dispatch_once(&Static.token) {
            Static.instance = GeofenceViewController()
            
            
        }
        
        return Static.instance!
    }
    
    func initializeGeoFenceKit(){
        
        
        
        self.locationManager.delegate = self;
        self.locationManager.requestWhenInUseAuthorization();
        self.locationManager.requestAlwaysAuthorization();
        self.locationManager.startUpdatingLocation()
        
        if(NSUserDefaults.standardUserDefaults().objectForKey(iBeaconScan) != nil){
            self.startMonitoringBeaconRegion(NSUserDefaults.standardUserDefaults().objectForKey(iBeaconScan) as! String);
        }
        
        
    }
    
    func startMonitoringBeaconRegion(beaconuuId:String){
        
        
        var beaconuId = "B9407F30-F5F8-466E-AFF9-25556B57FE6D";//"e2c56db5-dffb-48d2-b060-d0f5a71096e0";
        
        if(count(beaconuuId) == count(beaconuId)){
            self.geofenceBeacon = CLBeaconRegion(proximityUUID: NSUUID(UUIDString:beaconuuId)!, identifier: "Estimotes");
        }
        if(self.geofenceBeacon == nil){
            
            var alertView:UIAlertView = UIAlertView(title: "", message:"Error, Please re-verify the entered UUID of the beacon.", delegate: nil, cancelButtonTitle: "Ok");
            alertView.show();
            
            self.geofenceBeacon = CLBeaconRegion(proximityUUID: NSUUID(UUIDString:beaconuId)!, identifier: "Estimotes");
        }
        
        
        self.geofenceBeacon!.notifyOnEntry = true;
        
        self.geofenceBeacon!.notifyOnExit = true;
        
        self.geofenceBeacon!.notifyEntryStateOnDisplay = true;
        self.locationManager.startMonitoringForRegion(self.geofenceBeacon);
    }
    
    func locationManager(manager: CLLocationManager!, didStartMonitoringForRegion region: CLRegion!) {
        self.locationManager.startRangingBeaconsInRegion(self.geofenceBeacon);
        manager.requestStateForRegion(self.geofenceBeacon)
        println("Scanning..., \(region)");
    }
    
    func locationManager(manager: CLLocationManager!, didDetermineState state: CLRegionState, forRegion inRegion: CLRegion!) {
        println("didDetermineState CLRegion \(inRegion)");
        println("didDetermineState CLRegionState \(state)");
        
        manager.startRangingBeaconsInRegion(self.geofenceBeacon)
        
    }
    
    func locationManager(manager: CLLocationManager!, monitoringDidFailForRegion region: CLRegion!, withError error: NSError!) {
        println("monitoringDidFailForRegion \(error) -> \(region)");
    }
    
    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
        println("didFailWithError \(error)")
    }
    
    func locationManager(manager: CLLocationManager!, didEnterRegion region: CLRegion!) {
        manager.startRangingBeaconsInRegion(region as! CLBeaconRegion)
        println("Possible Match");
    }
    
    func locationManager(manager: CLLocationManager!, didExitRegion region: CLRegion!) {
        println("didExitRegion");
        manager.stopRangingBeaconsInRegion(region as! CLBeaconRegion)
        
    }
    
    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        println("didUpdateLocations");
    }
    
    func locationManager(manager: CLLocationManager!, didRangeBeacons beacons: [AnyObject]!, inRegion region: CLBeaconRegion!) {
        println(beacons);
        
        
        
        if(beacons.count == 0){
            
            if(isEnteredInBeaconRegion == true){
                AppleHomeKitUtilities.sharedInstance.didExitBeaconRegion();
            }
            isEnteredInBeaconRegion = false;
            
        }
        else{
            
            let beacon:CLBeacon = beacons.last as! CLBeacon;
            switch(beacon.proximity){
            case CLProximity.Unknown:
                println("Unkown");
                break;
            case CLProximity.Immediate:
                println("Immediate");
                if(isEnteredInBeaconRegion == false){
                    AppleHomeKitUtilities.sharedInstance.didEnterBeaconRegion();
                }
                isEnteredInBeaconRegion = true;
                
                break;
            case CLProximity.Near:
                println("Near");
                if(isEnteredInBeaconRegion == false){
                    AppleHomeKitUtilities.sharedInstance.didEnterBeaconRegion();
                }
                isEnteredInBeaconRegion = true;
                
                break;
            case CLProximity.Far:
                println("Far");
                if(isEnteredInBeaconRegion == true){
                    AppleHomeKitUtilities.sharedInstance.didExitBeaconRegion();
                }
                isEnteredInBeaconRegion = false;
                
                break;
                
                
            }
        }
        
    }
    
    
}