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main/MyFriendsAround.WP7/ViewModel/MainViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Device.Location;
+using System.Net;
+using System.ServiceModel.Channels;
+using System.Windows;
+using System.Windows.Input;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+using GalaSoft.MvvmLight.Messaging;
+using GalaSoft.MvvmLight.Threading;
+using Hammock;
+using Hammock.Serialization;
+using Microsoft.Phone.Controls;
+using Microsoft.Silverlight.Testing;
+using MyFriendsAround.Common.Entities;
+using MyFriendsAround.WP7.Service;
+using MyFriendsAround.WP7.Utils;
+using Newtonsoft.Json;
+
+namespace MyFriendsAround.WP7.ViewModel
+{
+    /// <summary>
+    /// This class contains properties that the main View can data bind to.
+    /// <para>
+    /// Use the <strong>mvvminpc</strong> snippet to add bindable properties to this ViewModel.
+    /// </para>
+    /// <para>
+    /// You can also use Blend to data bind with the tool's support.
+    /// </para>
+    /// <para>
+    /// See http://www.galasoft.ch/mvvm/getstarted
+    /// </para>
+    /// </summary>
+    public class MainViewModel : ViewModelBase
+    {
+        public string ApplicationTitle
+        {
+            get
+            {
+                return "MVVM LIGHT";
+            }
+        }
+
+        public string PageName
+        {
+            get
+            {
+                //myfriendsservice 
+                return "My page:";
+            }
+        }
+
+        public string Welcome
+        {
+            get
+            {
+                return "Welcome to MVVM Light";
+            }
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the MainViewModel class.
+        /// </summary>
+        public MainViewModel()
+        {
+            MyName = "Guest";
+            PublishLocationCommand = new RelayCommand(() => PublishLocationAction());
+            if (IsInDesignMode)
+            {
+                // Code runs in Blend --> create design time data.
+            }
+            else
+            {
+                // Code runs "for real"
+                ServiceAgent.GetFriends(this.GetFriendsResult);
+            }
+
+        }
+
+        private void PopulatePushPins(List<Friend> list)
+        {
+            ObservableCollection<PushPinModel> result = new ObservableCollection<PushPinModel>();
+            list.ForEach((f) =>
+                             {
+                                 //f.LocationStr
+                                 result.Add(new PushPinModel()
+                                                  {
+                                                      PinSource = "ApplicationIcon.png",
+                                                      Location = new GeoCoordinate(f.Latitude, f.Longitude)
+                                                  });
+                             });            
+            PushPins = result;
+
+        }
+
+
+        private void PublishLocationAction()
+        {
+            Friend myInfo = new Friend();
+            myInfo.Id = Identification.GetDeviceId();
+            myInfo.FriendName = MyName;
+            myInfo.LastUpdated = DateTime.UtcNow;
+            myInfo.LocationStr = string.Format("POINT({0} {1})", MapCenter.Latitude, MapCenter.Longitude);
+            ServiceAgent.PublishLocation(myInfo, new EventHandler<PublishLocationEventArgs>(PublishLocationResult));
+        }
+
+        public void GetFriendsResult(object sender, FriendsListEventArgs args)
+        {
+            List<Friend> list = args.Friends;
+            DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                                                      {
+                                                          PopulatePushPins(list);
+                                                      }
+                );
+        }
+
+        public void PublishLocationResult(object sender, PublishLocationEventArgs args)
+        {
+            if (!args.IsSuccess)
+            {
+                var message = new DialogMessage("Communication error!", DialogMessageCallback)
+                {
+                    Button = MessageBoxButton.OK,
+                    Caption = "Error!"
+                };
+
+                Messenger.Default.Send(message);
+            }
+            //
+            //update
+            ServiceAgent.GetFriends(this.GetFriendsResult);
+        }
+
+        private void DialogMessageCallback(MessageBoxResult result)
+        {
+            if (result == MessageBoxResult.OK)
+            {
+                //Message = "Continue";
+            }
+            else
+            {
+                //Message = "Stop";
+            }
+        }
+
+        public RelayCommand PublishLocationCommand { get; set; }
+        public string MyName { get; set; }
+
+        ////public override void Cleanup()
+        ////{
+        ////    // Clean up if needed
+
+        ////    base.Cleanup();
+        ////}
+
+
+        /// <summary>
+        /// The <see cref="PushPins" /> property's name.
+        /// </summary>
+        public const string PushPinsPropertyName = "PushPins";
+        private ObservableCollection<PushPinModel> _PushPins = new ObservableCollection<PushPinModel>();
+        /// <summary>
+        /// Gets the PushPins property.
+        /// </summary>
+        public ObservableCollection<PushPinModel> PushPins
+        {
+            get
+            {
+                return _PushPins;
+            }
+
+            set
+            {
+                if (_PushPins == value)
+                {
+                    return;
+                }
+
+                var oldValue = _PushPins;
+                _PushPins = value;
+
+                // Update bindings, no broadcast
+                RaisePropertyChanged(PushPinsPropertyName);
+
+                //// Update bindings and broadcast change using GalaSoft.MvvmLight.Messenging
+                //RaisePropertyChanged(PushPinsPropertyName, oldValue, value, true);
+            }
+        }
+
+
+
+
+        /// <summary>
+        /// The <see cref="MapCenter" /> property's name.
+        /// </summary>
+        public const string MapCenterPropertyName = "MapCenter";
+        private GeoCoordinate _mapCenter = new GeoCoordinate(0,0);
+
+        /// <summary>
+        /// Gets the MapCenter property.
+        /// </summary>
+        public GeoCoordinate MapCenter
+        {
+            get
+            {
+                return _mapCenter;
+            }
+
+            set
+            {
+                if (_mapCenter == value)
+                {
+                    return;
+                }
+
+                var oldValue = _mapCenter;
+                _mapCenter = value;
+
+                // Update bindings, no broadcast
+                RaisePropertyChanged(MapCenterPropertyName);
+                //// Update bindings and broadcast change using GalaSoft.MvvmLight.Messenging
+                //RaisePropertyChanged(MapCenterPropertyName, oldValue, value, true);
+            }
+        }
+    }
+}