import UIKit
import PushKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,PKPushRegistryDelegate {

    var window: UIWindow?

    var isUserHasLoggedInWithApp: Bool = true
    var checkForIncomingCall: Bool = true
    var userIsHolding: Bool = true

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {


        if #available(iOS 8.0, *){


            let viewAccept = UIMutableUserNotificationAction()
            viewAccept.identifier = "VIEW_ACCEPT"
            viewAccept.title = "Accept"
            viewAccept.activationMode = .Foreground
            viewAccept.destructive = false
            viewAccept.authenticationRequired =  false

            let viewDecline = UIMutableUserNotificationAction()
            viewDecline.identifier = "VIEW_DECLINE"
            viewDecline.title = "Decline"
            viewDecline.activationMode = .Background
            viewDecline.destructive = true
            viewDecline.authenticationRequired = false

            let INCOMINGCALL_CATEGORY = UIMutableUserNotificationCategory()
            INCOMINGCALL_CATEGORY.identifier = "INCOMINGCALL_CATEGORY"
            INCOMINGCALL_CATEGORY.setActions([viewAccept,viewDecline], forContext: .Default)

            if application.respondsToSelector("isRegisteredForRemoteNotifications")
            {
                let categories = NSSet(array: [INCOMINGCALL_CATEGORY])
                let types:UIUserNotificationType = ([.Alert, .Sound, .Badge])

                let settings:UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, categories: categories as? Set<UIUserNotificationCategory>)

                application.registerUserNotificationSettings(settings)
                application.registerForRemoteNotifications()
            }

        }
        else{
            let types: UIRemoteNotificationType = [.Alert, .Badge, .Sound]
            application.registerForRemoteNotificationTypes(types)
        }


        self.PushKitRegistration()

    return true
    }
    //MARK: - PushKitRegistration

    func PushKitRegistration()
    {

        let mainQueue = dispatch_get_main_queue()
        // Create a push registry object
        if #available(iOS 8.0, *) {

        let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)

        // Set the registry's delegate to self

        voipRegistry.delegate = self

        // Set the push type to VoIP

        voipRegistry.desiredPushTypes = [PKPushTypeVoIP]

        } else {
        // Fallback on earlier versions
        }


    }


    @available(iOS 8.0, *)
    func pushRegistry(registry: PKPushRegistry!, didUpdatePushCredentials credentials: PKPushCredentials!, forType type: String!) {
        // Register VoIP push token (a property of PKPushCredentials) with server

        let hexString : String = UnsafeBufferPointer<UInt8>(start: UnsafePointer(credentials.token.bytes),
        count: credentials.token.length).map { String(format: "%02x", $0) }.joinWithSeparator("")

        print(hexString)


    }


    @available(iOS 8.0, *)
    func pushRegistry(registry: PKPushRegistry!, didReceiveIncomingPushWithPayload payload: PKPushPayload!, forType type: String!) {

        // Process the received push

        // Below process is specific to schedule local notification once pushkit payload received

        var arrTemp = [NSObject : AnyObject]()
        arrTemp = payload.dictionaryPayload

        let dict : Dictionary <String, AnyObject> = arrTemp["aps"] as! Dictionary<String, AnyObject>


        if isUserHasLoggedInWithApp // Check this flag then only proceed
        {

            if UIApplication.sharedApplication().applicationState == UIApplicationState.Background || UIApplication.sharedApplication().applicationState == UIApplicationState.Inactive
            {

                if checkForIncomingCall // Check this flag to know incoming call or something else
                {

                    var strTitle : String = dict["alertTitle"] as? String ?? ""
                    let strBody : String = dict["alertBody"] as? String ?? ""
                    strTitle = strTitle + "\n" + strBody

                    let notificationIncomingCall = UILocalNotification()

                    notificationIncomingCall.fireDate = NSDate(timeIntervalSinceNow: 1)
                    notificationIncomingCall.alertBody =  strTitle
                    notificationIncomingCall.alertAction = "Open"
                    notificationIncomingCall.soundName = "SoundFile.mp3"
                    notificationIncomingCall.category = dict["category"] as? String ?? ""

                    //"As per payload you receive"
                    notificationIncomingCall.userInfo = ["key1": "Value1"  ,"key2": "Value2" ]


                    UIApplication.sharedApplication().scheduleLocalNotification(notificationIncomingCall)

                }
                else
                {
                    //  something else
                }

            }
        }


    }

    //MARK: - Local Notification Methods

    func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification){

        // Your interactive local notification events will be called at this place

    }


}

<key>UIBackgroundModes</key>
<array>
    <string>audio</string>
    <string>voip</string>
    <string>fetch</string>
    <string>remote-notification</string>
</array>

<?php

// Put your device token here (without spaces):


$deviceToken = '1234567890123456789';
//


// Put your private key's passphrase here:
$passphrase = 'ProjectName';

// Put your alert message here:
$message = 'My first silent push notification!';



$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', 'PemFileName.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase);

// Open a connection to the APNS server
$fp = stream_socket_client(
//  'ssl://gateway.push.apple.com:2195', $err,
'ssl://gateway.sandbox.push.apple.com:2195', $err,
$errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);

if (!$fp)
exit("Failed to connect: $err $errstr" . PHP_EOL);

echo 'Connected to APNS' . PHP_EOL;

// Create the payload body

$body['aps'] = array(
'content-available'=> 1,
'alert' => $message,
'sound' => 'default',
'badge' => 0,
);



// Encode the payload as JSON

$payload = json_encode($body);

// Build the binary notification
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;

// Send it to the server
$result = fwrite($fp, $msg, strlen($msg));

if (!$result)
echo 'Message not delivered' . PHP_EOL;
else
echo 'Message successfully delivered' . PHP_EOL;

// Close the connection to the server
fclose($fp);

$ openssl x509 -in aps_development.cer -inform der -out PushCert.pem

// Convert .p12 to .pem. Enter your pass pharse which is the same pwd that you have given while creating the .p12 certificate. PEM pass phrase also same as .p12 cert.  
$ openssl pkcs12 -nocerts -out PushKey1.pem -in pushkey.p12

Enter Import Password:

MAC verified OK

Enter PEM pass phrase:

Verifying - Enter PEM pass phrase:

// To remove passpharse for the key to access globally. This only solved my stream_socket_client() & certificate capath warnings.
$ openssl rsa -in PushKey1.pem -out PushKey1_Rmv.pem

Enter pass phrase for PushChatKey1.pem:

writing RSA key

// To join the two .pem file into one file:
$ cat PushCert.pem PushKey1_Rmv.pem > ApnsDev.pem

- Put debug pointer on delegate methods
- Go to edit scheme
- Select run option then Launch -> Wait for executable to be launched
- Send push kit payload from back end
- Once you get payload on device
- it will automatically invoke and debug pointer will invoke at delegate methods.

    didFinishLaunchingWithOptions // will invoke

    didReceiveIncomingPushWithPayload // payload method gets invoke

    didReceiveLocalNotification  // receive local notification

    handleActionWithIdentifier // handler method if you have action buttons ( local )

    didReceiveRemoteNotification // receive remote notification

    handleActionWithIdentifier // handler method if you have action buttons ( remote )