prs/prs.mobile.new/PRS.Mobile/App.xaml.cs

using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.Mobile;
using InABox.Rpc;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
namespace PRS.Mobile
{
    
    public enum TransportStatus
    {
        BadConfiguration,
        NoConnection,
        OK,
        None
    }
    
    public partial class App : Application
    {
        
        public static string LaunchParameters { get; set; }

        public static IRpcClientTransport Transport { get; set; }
        
        public static TransportStatus ConnectTransport(string[] urls)
        {
            if (Transport?.IsConnected() == true)
                Transport.Disconnect();
            
            Transport = null;
            
            if (!urls.Any())
                return TransportStatus.BadConfiguration;
            
            var transport = new RpcClientSocketTransport(urls);
            transport.Connect();
            if (!transport.IsConnected())
                return TransportStatus.NoConnection;

            Transport = transport;
            ClientFactory.SetClientType(typeof(RpcClient<>), InABox.Core.Platform.TimeBench, MobileUtils.AppVersion.InstalledVersionNumber + App.DeviceString, Transport);
            
            // Workaround for bug in RPCSocketServer where lrge uploads (ie photos)
            // actually crash the server.  So to get something working, we'll
            // fall back to a Rest Client while still maintaining the RPC Transport stuff
            var info = new Client<User>().Info();
            if (info.RestPort != 0)
            {
                var resturl = $"{transport.ServerName()}:{info.RestPort}";
                ClientFactory.SetClientType(typeof(RestClient<>), InABox.Core.Platform.TimeBench,
                    MobileUtils.AppVersion.InstalledVersionNumber + App.DeviceString, resturl);
            }

            return TransportStatus.OK;
        }

        public static LocationServices GPS { get; } = new LocationServices() { ScanDelay = new TimeSpan(0, 1, 0) };

        public static Bluetooth Bluetooth { get; } = new Bluetooth() { ScanDelay = new TimeSpan(0, 1, 0) };

        public static DataModel Data { get; } = new DataModel();
        
        public static string DeviceString
        {
            get
            {
                var result = Device.RuntimePlatform.Substring(0, 1).ToUpper();
                if (Device.Idiom == TargetIdiom.Phone)
                    result = result.ToLower();
                return result;
            }
        }
        
        public static double GetXamarinWidth()
        {
            var mainDisplayInfo = DeviceDisplay.MainDisplayInfo;
            var width = mainDisplayInfo.Width;
            return width / mainDisplayInfo.Density;
        }

        public static bool IsInForeground { get; set; } = false;
        
        
        // this is set by PINLoginPage if DatabaseSettings.UserID is blank
        // Effective, this will enable the "back" (-> logout) button on the Main page
        // if the userid is not set.
        public static bool IsSharedDevice { get; set; }

        public const string MessageOnStart = "OnStart";
        public const string MessageOnSleep = "OnSleep";
        public const string MessageOnResume = "OnResume";

        
        public App()
        {
            InitializeComponent();
            
            // https://github.com/Baseflow/XF-Material-Library
            XF.Material.Forms.Material.Init(this);
            XF.Material.Forms.Material.Use("Material.Configuration");

            MobileUtils.Init();
            CoreUtils.RegisterClasses();
            ComalUtils.RegisterClasses();
            
            StartMonitoringGPS();
            
            StartMonitoringBlueTooth();
            
            // PINLoginPage is going to be the root navigation page.
            // If shown, it will rerun the validation process
            // So we should be able to get to this page from
            // 1. App Startup => Autologin
            // 2. SettingsPage.Save() => AutoLogin
            // 3. Main Window => Always manual login?
            var login = new PinLoginPage();
            var navigation = new NavigationPage(login); 
            MainPage = navigation;
        }

        protected override void OnStart()
        {
            // Handle when your app starts
        }

        protected override void OnSleep()
        {
            // Handle when your app sleeps
        }

        protected override void OnResume()
        {
            // Handle when your app resumes
        }
        
        private void StartMonitoringGPS()
        {

            Task.Run(() =>
            {
                while (true)
                {

                    if (App.IsInForeground)
                    {
                        try
                        {
                            GPS.GetLocation();
                        }
                        catch (Exception e)
                        {
                            // Need to Log this
                        }
                    }

                    Thread.Sleep(TimeSpan.FromSeconds(30));
                }
            });
        }
        
        private void StartMonitoringBlueTooth()
        {
            Task.Run(() =>
            {
                while (true)
                {
                    if (App.IsInForeground)
                    {
                        try
                        {
                            Bluetooth.ScanForDevices();
                        }
                        catch (Exception e)
                        {
                            // Need to Log this
                        }
                    }
                    Thread.Sleep(TimeSpan.FromSeconds(30));
                }
            });
        }


    }
}