ShanXi_SmartControl/GDNXFD.Alert.Config/ViewModel/MainViewModel.cs

namespace GDNXFD.Alert.Config.ViewModel
{
    using GalaSoft.MvvmLight.Messaging;
    using GDNXFD.Alert.Config.Helpers;
    using GDNXFD.Alert.Config.Model;
    using GDNXFD.Alert.Config.Resources.Strings;
    using GDNXFD.Alert.Config.Services.Navigation;
    using GDNXFD.Alert.Config.ViewModel.Base;
    using Views;
    using System;
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.IO;
    using System.Linq;
    using System.Threading.Tasks;
    using System.Windows;
    using System.Xml;

    /// <summary>
    /// MainWindow ViewModel
    /// </summary>
    public class MainViewModel : VMBase
    {
        private const string APPIMAGE_PATH = "Resources/Images/icon.png";
        private readonly INavigationService navService;
        private bool isVisibleDialog;
        private CustomDialogMessage dialogMessage;

        /// <summary>
        /// Initializes a new instance of the MainViewModel class.
        /// </summary>
        public MainViewModel(
            INavigationService navService)
        {
            this.navService = navService;
            Messenger.Default.Register<LoadingMessage>(this, HandleLoadingMessage);
            Messenger.Default.Register<UserLoginMessage>(this, HandleUserLoginMessage);
            Messenger.Default.Register<CustomDialogMessage>(this, HandleDialogMessage);
        }

        /// <summary>
        /// Initialize data
        /// </summary>
        /// <returns></returns>
        public void InitializeData()
        {
           //Messenger.Default.Send(new LoadingMessage(true));
            navService.NavigateToLogin();//.NavigateToRuleList();
        }

        private static void ShowErrorMessage(string textMessage)
        {
            CustomDialogMessage message = new CustomDialogMessage(null, textMessage, Visibility.Collapsed);
            Messenger.Default.Send<CustomDialogMessage>(message);
            Messenger.Default.Send(new LoadingMessage(false));
        }

        public bool IsLogin
        {
            get
            {
                return string.IsNullOrWhiteSpace(GlobalVar.CurrentUser) ? false : true;
            }
        }

        public string Username
        {
            get
            {
                return StringProvider.GetString("Welcome") + GlobalVar.CurrentUser;
            }
        }

        /// <summary>
        /// Is visible dialog control.
        /// </summary>
        public bool IsVisibleDialog
        {
            get { return this.isVisibleDialog; }
            set
            {
                this.isVisibleDialog = value;
                RaisePropertyChanged();
            }
        }

        /// <summary>
        /// CustomDialogMessage instance used as datacontext for the confirmation dialog.
        /// </summary>
        public CustomDialogMessage DialogMessage
        {
            get { return this.dialogMessage; }
            set
            {
                this.dialogMessage = value;
                RaisePropertyChanged();
            }
        }

        private void HandleLoadingMessage(LoadingMessage msg)
        {
            IsBusy = msg.IsLoading;
        }

        private void HandleUserLoginMessage(UserLoginMessage msg)
        {
            foreach (Window window in App.Current.Windows)
            {
                if ((window as MainWindow) != null)
                {
                    window.Top = window.Top - (750-window.Height) /2;
                    window.Left = window.Left - (1024-window.Width)/2;
                    window.Width = 1024;
                    window.Height = 750;
                }
            }
            RaisePropertyChanged(() => IsLogin);
            RaisePropertyChanged(() => Username);
        }

        private void HandleDialogMessage(CustomDialogMessage msg)
        {
            IsVisibleDialog = true;
            msg.CancelAction = () =>
            {
                IsVisibleDialog = false;
            };

            DialogMessage = msg;
        }

        /// <summary>
        /// Dispose
        /// </summary>
        /// <param name="dispose"></param>
        protected override void Dispose(bool dispose)
        {
            base.Dispose(dispose);
            Messenger.Default.Unregister<LoadingMessage>(this, HandleLoadingMessage);
            Messenger.Default.Unregister<UserLoginMessage>(this, HandleUserLoginMessage);
            Messenger.Default.Unregister<CustomDialogMessage>(this, HandleDialogMessage);
        }
    }
}