clover/apps/ios/cleverrc/ViewController.swift

//
//  ViewController.swift
//  cleverrc
//
//  Created by Oleg Kalachev on 20.01.2018.
//  Copyright © 2018 Copter Express. All rights reserved.
//

import UIKit
import WebKit
import SwiftSocket
import NotificationBannerSwift

class ViewController: UIViewController, WKScriptMessageHandler {
    @IBOutlet weak var webView: WKWebView!
    let impactGenerator = UIImpactFeedbackGenerator(style: .medium)
    let notificationGenerator = UINotificationFeedbackGenerator()
    let udpSocket = UDPClient(address:"255.255.255.255", port: 35602)

    override func viewDidLoad() {
        super.viewDidLoad()

        // Don't lock screen
        UIApplication.shared.isIdleTimerDisabled = true

        // Setup webview event handlers
        webView.configuration.userContentController.add(self, name: "control")
        webView.configuration.userContentController.add(self, name: "controlStart")
        webView.configuration.userContentController.add(self, name: "lowBattery")
        webView.configuration.userContentController.add(self, name: "notification")

        // Load the main page
        let url = Bundle.main.url(forResource: "index", withExtension: "html")
        let requestObj = URLRequest(url: url!)
        webView.load(requestObj)

        // Setup UDP broadcasting
        udpSocket.enableBroadcast()

        // Set UDP broadcasting interface
        var wifiInterface = if_nametoindex("en0");
        setsockopt(udpSocket.fd!, IPPROTO_IP, IP_BOUND_IF, &wifiInterface, socklen_t(MemoryLayout<UInt32>.size));
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        if (message.name == "control") {
            // Send UDP control message
            let m = message.body as! NSDictionary;
            let d = pack("<hhhh", [m["x"]!, m["y"]!, m["z"]!, m["r"]!])
            _ = udpSocket.send(data: d)
        } else if (message.name == "lowBattery") {
            // Got low battery notification
            print("Low battery notification")
            notificationGenerator.notificationOccurred(.warning)
        } else if (message.name == "notification") {
            // Got notification message
            print(message)
            let m = message.body as! NSDictionary;
            let level = m["level"] as! Int
            if level == 4 {
                let banner = NotificationBanner(title: m["msg"] as! String, style: .warning)
                banner.show()
            } else {
                let banner = NotificationBanner(title: m["msg"] as! String, style: .danger)
                banner.show()
            }
        }
    }
}