Merge branch 'vnext' of github.com:pazof/yavsc into vnext

BookAStar/BookAStar/App.xaml.cs

@@ -25,6 +25,7 @@ namespace BookAStar
     using ViewModels.UserProfile;
     using Pages.UserProfile;
     using ViewModels.EstimateAndBilling;
+    using System.Net;
 
     public partial class App : Application // superclass new in 1.3
     {
@@ -109,7 +110,7 @@ namespace BookAStar
                         BindingContext = page.BindingContext
                     });
             }
-            DataManager.Current.AppState.SaveCollection();
+            DataManager.Current.AppState.SaveEntity();
         }
 
         // called on app startup, after OnStartup, not on rotation
@@ -124,7 +125,7 @@ namespace BookAStar
                     pageType, true, pageState.BindingContext);
             }
             DataManager.Current.AppState.Clear();
-            DataManager.Current.AppState.SaveCollection();
+            DataManager.Current.AppState.SaveEntity();
         }
 
         // FIXME Not called? 
@@ -206,6 +207,7 @@ namespace BookAStar
             masterDetail.Detail = new NavigationPage(home);
             ToolbarItem tiSetts = new ToolbarItem()
             {
+                // FIXME what for? Priority = 0, 
                 Text = "Paramètres",
                 Icon = "ic_corp_icon.png",
                 Command = new Command(
@@ -290,7 +292,19 @@ namespace BookAStar
         // Start the Hub connection
         public async void StartHubConnection ()
         {
-            await chatHubConnection.Start();
+            try
+            {
+                await chatHubConnection.Start();
+            }
+            catch (WebException webex )
+            {
+                // TODO use webex, set this cx down status somewhere,
+                // & display it & maybe try again later.
+            }
+            catch (Exception ex)
+            {
+                // TODO use ex
+            }
         }
 
         public void SetupHubConnection()

BookAStar/BookAStar/BookAStar.csproj

@@ -61,6 +61,9 @@
     <Compile Include="Pages\UserProfile\UserFiles.xaml.cs">
       <DependentUpon>UserFiles.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Pages\UserProfile\UserProfilePage.xaml.cs">
+      <DependentUpon>UserProfilePage.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Settings\ChatSettings.cs" />
     <Compile Include="ViewModels\EditingViewModel.cs" />
     <Compile Include="Pages\DocSigning.xaml.cs">
@@ -78,7 +81,6 @@
     <Compile Include="Extensions\ImageResourceExtension.cs" />
     <Compile Include="Factories\ViewFactory.cs" />
     <Compile Include="Data\DataManager.cs" />
-    <Compile Include="Helpers\ObservableString.cs" />
     <Compile Include="Interfaces\ILocalEntity.cs" />
     <Compile Include="Data\LocaLEntity.cs" />
     <Compile Include="Helpers\NotIdentifiedException.cs" />
@@ -422,6 +424,12 @@
       <SubType>Designer</SubType>
     </EmbeddedResource>
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Pages\UserProfile\UserProfilePage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <Import Project="..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets" Condition="Exists('..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

BookAStar/BookAStar/Data/DataManager.cs

@@ -7,6 +7,7 @@
     using Model.Social.Messaging;
     using Model.FileSystem;
     using ViewModels.EstimateAndBilling;
+    using NonCrUD;
 
     public class DataManager
     {
@@ -14,7 +15,7 @@
         public RemoteEntityRO<BookQueryData, long> BookQueries { get; set; }
         public RemoteEntity<Estimate, long> Estimates { get; set; }
         public RemoteEntity<Blog, long> Blogspot { get; set; }
-        internal RemoteEntity<UserDirectoryInfo, string> RemoteFiles { get; set; }
+        internal RemoteFilesEntity RemoteFiles { get; set; }
 
         public LocalEntity<ClientProviderInfo,string> Contacts { get; set; }
         internal LocalEntity<PageState, int> AppState { get; set; }
@@ -48,7 +49,7 @@
             EstimationCache = new LocalEntity<EditEstimateViewModel, long>(e => e.Query.Id);
             EstimateLinesTemplates = new LocalEntity<BillingLine, string>(l => l.Description);
             PrivateMessages = new LocalEntity<ChatMessage, int>(m=> m.GetHashCode());
-            RemoteFiles = new RemoteEntity<UserDirectoryInfo, string> ("fs", d => d.SubPath);
+            RemoteFiles = new RemoteFilesEntity ();
 
             PrivateMessages.Load();
             BookQueries.Load();

BookAStar/BookAStar/Data/LocaLEntity.cs

@@ -40,14 +40,24 @@ namespace BookAStar.Data
             return CurrentItem;
         }
 
-        public void Load()
+        public virtual bool Load()
         {
-            this.Populate<V>();
+            return this.Populate<V,K>();
         }
 
-        public void Load(string subKey)
+        public virtual bool Load(string subKey)
         {
-            this.Populate<V>(subKey);
+            return (this.Populate<V,K>(subKey));
+        }
+        public virtual bool Seek(int index)
+        {
+            
+            if (this.Count>index && index >=0)
+            {
+                CurrentItem = this[index];
+                return true;
+            }
+            return false;
         }
     }
 

BookAStar/BookAStar/Data/NonCrUD/RemoteFiles.cs

@@ -6,10 +6,17 @@ namespace BookAStar.Data.NonCrUD
 {
     using Helpers;
     using Model.FileSystem;
+    using System.Linq;
+    /*
+    public class DirectoryEntryChangingEvent : EventArgs
+    {
+        public UserDirectoryInfo OldItem { get; set; }
+        public UserDirectoryInfo NewItem { get; set; }
+    }*/
 
-    public class RemoteFiles : RemoteEntity<UserDirectoryInfo, FileAddress>
+    public class RemoteFilesEntity : RemoteEntity<UserDirectoryInfo, FileAddress>
     {
-        public RemoteFiles() : base("fs", d => d)
+        public RemoteFilesEntity() : base("fs", d => d)
         {
 
         }
@@ -23,14 +30,15 @@ namespace BookAStar.Data.NonCrUD
                 try
                 {
                     var subpath = parameter as string;
-                    string path = ControllerUri.AbsolutePath + ((subpath != null) ? "/" + subpath : null);
+                    string path = ControllerUri.AbsoluteUri + ((subpath != null) ? "/" + subpath : null);
-                    using (var response = await client.GetAsync(ControllerUri))
+                    using (var response = await client.GetAsync(path))
                     {
                         if (response.IsSuccessStatusCode)
                         {
                             var content = await response.Content.ReadAsStringAsync();
                             var di = JsonConvert.DeserializeObject<UserDirectoryInfo>(content);
                             this.Merge(di);
+                            this.SaveEntity();
                         }
                         else if (response.StatusCode == System.Net.HttpStatusCode.BadRequest)
                             throw new Exception("Bad request");
@@ -43,8 +51,32 @@ namespace BookAStar.Data.NonCrUD
                     throw new Exception("Remote call failed", ex);
                 }
             }
+            AfterExecuting();
+        }
+
+        /*
+        public override void Merge(UserDirectoryInfo item)
+        {
+            var key = GetKey(item);
+            DirectoryEntryChangingEvent itemChanged = null;
+            if (this.Any(x => GetKey(x).Equals(key)))
+            {
+                var old = LocalGet(key);
+                itemChanged = new DirectoryEntryChangingEvent
+                {
+                    OldItem = old,
+                    NewItem = item
+                };
+                Remove(old);
+            }
+            Add(item);
+            CurrentItem = item;
+            if (DirectoryEntryChanged != null && itemChanged != null)
+                DirectoryEntryChanged.Invoke(this, itemChanged);
         }
 
+        public event EventHandler<DirectoryEntryChangingEvent> DirectoryEntryChanged;
+        */
 
     }
 }

BookAStar/BookAStar/Data/RemoteEntity.cs

@@ -65,7 +65,7 @@ namespace BookAStar.Data
                             {
                                 Merge(item);
                             }
-                            this.SaveCollection();
+                            this.SaveEntity();
                         }
                     }
                 }

BookAStar/BookAStar/Helpers/ObservableString.cs

@@ -1,59 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace BookAStar
-{
-    public class ObservableString : IObservable<string>, IDisposable
-    {
-        public ObservableString(string data)
-        {
-            this.data = data;
-        }
-        private string data = null;
-        private List<IObserver<string>> observers = new List<IObserver<string>>();
-
-        public string Data
-        {
-            get
-            {
-                return data;
-            }
-
-            set
-            {
-                if (data != value)
-                {
-                    data = value;
-                    foreach (var obs in observers)
-                        obs.OnCompleted();
-                }
-            }
-        }
-
-        public override string ToString()
-        {
-            return data;
-        }
-
-        public static explicit operator ObservableString  (string data)
-        {
-            return new ObservableString(data);
-        }
-
-        public static explicit operator string (ObservableString observable)
-        {
-            return observable.ToString();
-        }
-
-        public void Dispose()
-        {
-            observers = null;
-        }
-
-        public IDisposable Subscribe(IObserver<string> observer)
-        {
-            observers.Add(observer);
-            return this;
-        }
-    }
-}

BookAStar/BookAStar/Interfaces/ILocalEntity.cs

@@ -1,10 +1,11 @@
 using System;
+using System.Collections;
 
 namespace BookAStar
 {
     public interface ILoadable
     {
-        void Load();
+        bool Load();
     }
 
     public interface IPersistentOnDemand : ILoadable
@@ -12,7 +13,7 @@ namespace BookAStar
         void Save();
     }
 
-    public interface ILocalEntity<V, K> : ILoadable where K : IEquatable<K>
+    public interface ILocalEntity<V, K> : IList, ILoadable where K : IEquatable<K>
     {
         V CurrentItem { get; }
 
@@ -22,5 +23,6 @@ namespace BookAStar
 
         void Merge(V item);
 
+        bool Seek(int index);
     }
 }

BookAStar/BookAStar/Pages/Estimate/BookQueryPage.xaml.cs

@@ -58,7 +58,7 @@ namespace BookAStar.Pages
 
         private void OnEditEstimate(object sender, EventArgs ev)
         {
-            var bookQueryViewModel = (BookQueryViewModel)BindingContext;
+            var bookQueryViewModel = (BookQueryViewModel) BindingContext;
 
             var editEstimateViewModel = bookQueryViewModel.DraftEstimate;
             if (editEstimateViewModel == null)
@@ -70,7 +70,7 @@ namespace BookAStar.Pages
                 if (estimateToEdit == null)
                 {
                     DataManager.Current.Contacts.Merge(BookQuery.Client);
-                    DataManager.Current.Contacts.SaveCollection();
+                    DataManager.Current.Contacts.SaveEntity();
                     estimateToEdit = new Estimate()
                     {
                         ClientId = BookQuery.Client.UserId,

BookAStar/BookAStar/Pages/Estimate/EditEstimatePage.xaml.cs

@@ -24,7 +24,7 @@ namespace BookAStar.Pages
 
         private void EditEstimatePage_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
         {
-            DataManager.Current.EstimationCache.SaveCollection();
+            DataManager.Current.EstimationCache.SaveEntity();
         }
 
         protected override void OnSizeAllocated(double width, double height)
@@ -47,7 +47,7 @@ namespace BookAStar.Pages
             var lineView = new BillingLineViewModel(com)
             { ValidateCommand = new Command(() => {
                 bill.Add(com);
-                bill.SaveCollection();
+                DataManager.Current.EstimationCache.SaveEntity();
             })};
             App.NavigationService.NavigateTo<EditBillingLinePage>(
                 true,
@@ -60,7 +60,7 @@ namespace BookAStar.Pages
             var lineView = new BillingLineViewModel(line)
             {
                 ValidateCommand = new Command(() => {
-                    bill.SaveCollection();
+                    DataManager.Current.EstimationCache.SaveEntity();
                 })
             };
             lineView.PropertyChanged += LineView_PropertyChanged;
@@ -71,7 +71,7 @@ namespace BookAStar.Pages
 
         private void LineView_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
         {
-            DataManager.Current.EstimationCache.SaveCollection();
+            DataManager.Current.EstimationCache.SaveEntity();
         }
 
         protected void OnEstimateValidated(object sender, EventArgs e)
@@ -88,9 +88,9 @@ namespace BookAStar.Pages
             {
                 DataManager.Current.Estimates.Update(evm.Data);
             }
-            DataManager.Current.Estimates.SaveCollection();
+            DataManager.Current.Estimates.SaveEntity();
             DataManager.Current.EstimationCache.Remove(evm);
-            DataManager.Current.EstimationCache.SaveCollection();
+            DataManager.Current.EstimationCache.SaveEntity();
             Navigation.PopAsync();
         }
     }

BookAStar/BookAStar/Pages/UserProfile/DashboardPage.xaml

@@ -18,36 +18,18 @@
       </Style>
     </ResourceDictionary>
   </ContentPage.Resources>
-  <ScrollView>
+  <ContentPage.Content>
-    <StackLayout Orientation="Vertical" >
+    <ScrollView>
-      <StackLayout>
+    <StackLayout BoxView.Color="{StaticResource ContentBackgroundColor}">
-        <lc:GesturesContentView ExcludeChildren="false" VisualElement.HeightRequest="{StaticResource BigUserAvatarSize}">
+      <Label Text="{Binding UserName}" Style="{StaticResource LabelPageHeadingStyle}"
-            <StackLayout>
+                                         HorizontalTextAlignment="Center"
-          <Label Text="{Binding UserName}" Style="{StaticResource LabelPageHeadingStyle}"
+                                         LineBreakMode="WordWrap" XAlign="Center"
-                                             HorizontalTextAlignment="Center"
-                                             LineBreakMode="WordWrap" XAlign="Center"
            ></Label>
 
-          <Frame VisualElement.HeightRequest="{StaticResource BigUserAvatarSize}">
 
-              <lb:Gestures.Interests>
+       <Image Source="{Binding Avatar}"
-                <lb:GestureCollection>
-                  <lb:GestureInterest GestureType="LongPress"
-                                      GestureCommand="{Binding UserNameGesture}"
-                                    />
-                </lb:GestureCollection>
-              </lb:Gestures.Interests>
-              <Image Source="{Binding Avatar}" Aspect="AspectFit"
                      VisualElement.HeightRequest="{StaticResource BigUserAvatarSize}" />
-
+       <views:RatingView Rating="{Binding Rating, Mode=TwoWay}" x:Name="ratingView" />
-            
-          </Frame>
-        </StackLayout>
-        </lc:GesturesContentView>
-        <views:RatingView Rating="{Binding Rating, Mode=TwoWay}" x:Name="ratingView"/>
-
-        
-      </StackLayout>
 
       <Button Text="{Binding PerformerStatus}" Clicked="OnViewPerformerStatus" />
       <Button Text="{Binding UserQueries}" Clicked="OnViewUserQueries"
@@ -63,11 +45,11 @@
         <Switch HorizontalOptions="End" IsToggled="{Binding AllowUseMyPosition, Mode=TwoWay}"/>
       </StackLayout>
       <StackLayout Orientation="Horizontal" VerticalOptions="Start"
-                   VisualElement.IsVisible="{Binding UserIsPro}">
+                   VisualElement.IsVisible="{Binding UserIsPro}" >
-        <Label Text="Ne recevoir de demande de devis que de la part de professionnels uniquement"
+        <Label Text="Ne recevoir de demande de devis que de la part de professionnels uniquement" />
-               StyleClass="Header"/>
         <Switch HorizontalOptions="End" IsToggled="{Binding AllowProBookingOnly, Mode=TwoWay}"/>
       </StackLayout>
     </StackLayout>
   </ScrollView>
+    </ContentPage.Content>
 </ContentPage>

BookAStar/BookAStar/Pages/UserProfile/DashboardPage.xaml.cs

@@ -6,6 +6,7 @@ namespace BookAStar.Pages.UserProfile
 {
     using Data;
     using ViewModels.UserProfile;
+
     public partial class DashboardPage : ContentPage
     {
 
@@ -23,10 +24,12 @@ namespace BookAStar.Pages.UserProfile
                         ShowPage<AccountChooserPage>(null, true);
                     });
         }
+
         public void OnManageFiles(object sender, EventArgs e)
         {
-            ShowPage<UserFiles>(new object[] { new DirectoryInfoViewModel() }, true);
+            ShowPage<UserFiles>(null, true);
         }
+
         public void OnViewPerformerStatus(object sender, EventArgs e)
         {
             ShowPage<AccountChooserPage>(null, true);

BookAStar/BookAStar/Pages/UserProfile/UserFiles.xaml

@@ -1,35 +1,49 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-             x:Class="BookAStar.Pages.UserProfile.UserFiles">
+             x:Class="BookAStar.Pages.UserProfile.UserFiles"
-  <Label Text="{Binding SubPath}" VerticalOptions="Center" HorizontalOptions="Center" />
+             Style="{StaticResource PageStyle}">
-  <ListView x:Name="dirlist" ItemsSource="{Binding SubDirectories}"
+  <ScrollView>
-          RefreshCommand="{Binding RefreshCommand}" >
+  <StackLayout>
-    <ListView.ItemTemplate >
+    <StackLayout Orientation="Horizontal">
-      <DataTemplate>
+      <Label Text="Dossiers:" />
-        <ViewCell>
+      <Label Text="{Binding UserName}" HorizontalOptions="Start" />
-          <ViewCell.View>
+      <Label Text="{Binding SubPath}" HorizontalOptions="Start" />
-            <StackLayout Orientation="Horizontal">
+    </StackLayout>
-              <Label Text="{Binding Name}" />
+    <ListView x:Name="filelist" ItemsSource="{Binding SubDirectories}"
-              <Label Text="{Binding Size}" />
+              RefreshCommand="{Binding RefreshCommand}"
-              <Label Text="{Binding CreationTime, StringFormat='créé {0:dddd d MMMM à HH:mm}'}" />
+              SeparatorVisibility="Default"
-              <Label Text="{Binding LastModified, StringFormat='modifié {0:dddd d MMMM à HH:mm}'}" />
+              VerticalOptions="Start">
-            </StackLayout>
+      <ListView.ItemTemplate >
-          </ViewCell.View>
+        <DataTemplate>
-        </ViewCell>
+          <ViewCell>
-      </DataTemplate>
+            <ViewCell.View>
-    </ListView.ItemTemplate>
+              <Label Text="{Binding .}" />
-  </ListView>
+            </ViewCell.View>
-  <ListView x:Name="filelist" ItemsSource="{Binding FileInfo}"
+          </ViewCell>
-            RefreshCommand="{Binding RefreshCommand}">
+        </DataTemplate>
-    <ListView.ItemTemplate >
+      </ListView.ItemTemplate>
-      <DataTemplate>
+    </ListView>
-        <ViewCell>
+    <ListView x:Name="dirlist" ItemsSource="{Binding FileInfo}"
-          <ViewCell.View>
+            RefreshCommand="{Binding RefreshCommand}"
-            <Label Text="{Binding .}" />
+              SeparatorVisibility="Default"
-          </ViewCell.View>
+              VerticalOptions="Start" >
-        </ViewCell>
+      <ListView.ItemTemplate >
-      </DataTemplate>
+        <DataTemplate>
-    </ListView.ItemTemplate>
+          <ViewCell>
-  </ListView>
+            <ViewCell.View>
+              <StackLayout Orientation="Horizontal">
+                <Label Text="{Binding Name}" />
+                <Label Text="{Binding Size, StringFormat='{0}b'}" /> 
+                <Label Text="{Binding CreationTime, StringFormat='créé {0:dddd d MMMM à HH:mm}'}" />
+                <Label Text="{Binding LastModified, StringFormat='modifié {0:dddd d MMMM à HH:mm}'}" />
+              </StackLayout>
+            </ViewCell.View>
+          </ViewCell>
+        </DataTemplate>
+      </ListView.ItemTemplate>
+    </ListView> 
+    
+  </StackLayout>
+    </ScrollView>
 </ContentPage>

BookAStar/BookAStar/Pages/UserProfile/UserFiles.xaml.cs

@@ -4,31 +4,49 @@ namespace BookAStar.Pages.UserProfile
 {
     using ViewModels.UserProfile;
     using Data;
+    using System.Windows.Input;
+
     public partial class UserFiles : ContentPage
     {
         protected DirectoryInfoViewModel model;
-
         public UserFiles()
         {
             InitializeComponent();
-
+            var current = DataManager.Current.RemoteFiles.CurrentItem;
-            var currentDir = DataManager.Current.RemoteFiles.CurrentItem;
+            if (current != null)
-
+                BindingContext = new DirectoryInfoViewModel(current);
-            BindingContext = new DirectoryInfoViewModel(currentDir)
+            else BindingContext = new DirectoryInfoViewModel
             {
-                RefreshCommand = new Command(() =>
+                UserName = MainSettings.UserName
-                {
-                    DataManager.Current.RemoteFiles.Execute(null);
-
-                    this.dirlist.EndRefresh();
-                    this.filelist.EndRefresh();
-                })
             };
         }
 
+        public UserFiles(DirectoryInfoViewModel model)
+        {
+            InitializeComponent();
+            BindingContext = model;
+        }
+
         protected override void OnBindingContextChanged()
         {
+            model = BindingContext as DirectoryInfoViewModel;
+            if (model != null)
+                model.RefreshCommand = new Command(() =>
+            {
+                DataManager.Current.RemoteFiles.Execute(null);
+                var item = DataManager.Current.RemoteFiles.CurrentItem;
+                if (item != null)
+                    model.InnerModel = item;
+           //     this.dirlist.EndRefresh();
+           //     this.filelist.EndRefresh();
+            });
             base.OnBindingContextChanged();
         }
+        protected override void OnAppearing()
+        {
+            base.OnAppearing();
+            model.RefreshCommand.Execute(model.SubPath);
+        }
+
     }
 }

BookAStar/BookAStar/Pages/UserProfile/UserProfilePage.xaml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="BookAStar.Pages.UserProfile.UserProfilePage">
+  <Label Text="{Binding UserName}" VerticalOptions="Center" HorizontalOptions="Center" />
+  
+</ContentPage>

BookAStar/BookAStar/Pages/UserProfile/UserProfilePage.xaml.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+
+namespace BookAStar.Pages.UserProfile
+{
+    public partial class UserProfilePage : ContentPage
+    {
+        public UserProfilePage()
+        {
+            InitializeComponent();
+        }
+    }
+}

BookAStar/BookAStar/Settings/MainSettings.cs

@@ -265,9 +265,9 @@ namespace BookAStar
         /// <typeparam name="V"></typeparam>
         /// <param name="collection"></param>
         /// <param name="subKey"></param>
-        public static void Populate<V>(this IList<V> collection, string subKey = null)
+        public static bool Populate<V,K>(this ILocalEntity<V, K> collection, string subKey = null) where K : IEquatable<K>
         {
-            var key = $"{EntityDataSettingsPrefix}/{subKey}/{typeof(V).FullName}";
+            var key = GetCollectionKey<V>(subKey);
             var data = AppSettings.GetValueOrDefault<string>(key, null);
             if (!string.IsNullOrWhiteSpace(data))
             {
@@ -275,7 +275,15 @@ namespace BookAStar
                 if (items != null)
                 foreach (var item in items)
                     collection.Add(item);
+                var cursorKey = GetCursorKey<V>(subKey);
+                var index = AppSettings.GetValueOrDefault<int>(cursorKey, -1);
+                if (index>=0)
+                {
+                    collection.Seek(index);
+                }
+                return true;
             }
+            return false;
         }
 
         /// <summary>
@@ -284,11 +292,25 @@ namespace BookAStar
         /// <typeparam name="V"></typeparam>
         /// <param name="collection"></param>
         /// <param name="subKey"></param>
-        public static void SaveCollection<V>(this IList<V> collection, string subKey=null)
+        public static void SaveEntity<V,K>(this ILocalEntity<V, K> collection, string subKey=null) where K : IEquatable<K>
         {
             if (collection == null) return;
-            var key = $"{EntityDataSettingsPrefix}/{subKey}/{typeof(V).FullName}";
+            var key = GetCollectionKey<V>(subKey);
+            var cursorKey = GetCursorKey<V>(subKey);
             AppSettings.AddOrUpdateValue(key, JsonConvert.SerializeObject(collection));
+            if (collection.CurrentItem!=null)
+            {
+                int index =  collection.IndexOf(collection.CurrentItem) ;
+                AppSettings.AddOrUpdateValue<int>(cursorKey, index);
+            }
+        }
+        private static string GetCursorKey<V>(string subKey)
+        {
+            return $"{EntityDataSettingsPrefix}/{subKey}/{typeof(V).FullName}/c";
+        }
+        private static string GetCollectionKey<V>(string subKey)
+        {
+            return $"{EntityDataSettingsPrefix}/{subKey}/{typeof(V).FullName}";
         }
     }
 }

BookAStar/BookAStar/ViewModels/UserProfile/DirectoryInfoViewModel.cs

@@ -5,28 +5,71 @@ using XLabs.Forms.Mvvm;
 
 namespace BookAStar.ViewModels.UserProfile
 {
+    using System.ComponentModel;
     using Model.FileSystem;
 
     public class DirectoryInfoViewModel :  ViewModel
     {
-        public ObservableString SubPath { get; set; }
+        private string subPath;
-        public ObservableCollection<string> SubDirectories { get; set; }
+        public string SubPath
-        public ObservableCollection<UserFileInfo> FileInfo { get; set; }
-        public ICommand RefreshCommand { get; set; }
-        public DirectoryInfoViewModel (UserDirectoryInfo model=null)
         {
-            Data.DataManager.Current.RemoteFiles.CollectionChanged += RemoteFiles_CollectionChanged;
+            get { return subPath; }
+            set { SetProperty<string>(ref subPath, value); }
+        }
+
+        private string userName;
+        public string UserName
+        {
+            get { return userName; }
+            set { SetProperty<string>(ref userName, value); }
+        }
+
+        private ObservableCollection<string> subDirectories;
+        public ObservableCollection<string> SubDirectories
+        {
+            get { return subDirectories; }
+            set { SetProperty< ObservableCollection < string >>( ref subDirectories, value) ; }
+        }
 
-            if (model == null)
+        private ObservableCollection<UserFileInfo> fileInfo;
-                model = Data.DataManager.Current.RemoteFiles.CurrentItem;
+        public ObservableCollection<UserFileInfo> FileInfo
-            SubDirectories = new ObservableCollection<string> (model.SubDirectories);
+        {
-            SubPath = new ObservableString (model.SubPath);
+            get { return fileInfo; }
-            FileInfo = new ObservableCollection<Model.FileSystem.UserFileInfo> (model.Files);
+            set { SetProperty<ObservableCollection<UserFileInfo>> ( ref fileInfo, value ); }
+        }
+
+        UserDirectoryInfo model;
+        public UserDirectoryInfo InnerModel {
+            get { return model; }
+            set {
+                if (SetProperty<UserDirectoryInfo>(ref model, value))
+                if (model == null)
+                {
+                    SubDirectories = new ObservableCollection<string>();
+                    FileInfo = new ObservableCollection<UserFileInfo>();
+                    SubPath = "<no path>";
+                    UserName = "<no user>";
+                }
+                else
+                {
+                    SubDirectories = new ObservableCollection<string>(model.SubDirectories);
+                    FileInfo = new ObservableCollection<UserFileInfo>(model.Files);
+                    SubPath = model.SubPath;
+                    UserName = model.UserName;
+                }
+            }
+        }
+
+        public DirectoryInfoViewModel(UserDirectoryInfo model = null)
+        {
+            this.InnerModel = model;
         }
 
-        private void RemoteFiles_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
+        private ICommand refreshCommand;
+        public ICommand RefreshCommand
         {
-            throw new System.NotImplementedException();
+            get { return refreshCommand; }
+            set { SetProperty<ICommand>(ref refreshCommand, value); }
         }
     }
 }

BookAStar/BookAStar/Views/RatingView.xaml

@@ -14,8 +14,8 @@
     </ResourceDictionary>
   </ContentView.Resources>
   <ContentView.Content>
-    <StackLayout>
+      <StackLayout>
-      <StackLayout Orientation="Horizontal" HeightRequest="70">
+        <StackLayout Orientation="Horizontal"  >
         <Grid>
           <Grid.Behaviors>
             <behaviors:StarBehavior x:Name="starOne" GroupName="myStar"/>
@@ -61,8 +61,7 @@
 
           <Image x:Name="starSelectedFour"
                   Source="{extensions:ImageResource BookAStar.Images.Validation.star_selected.png}"
-                  IsVisible="{Binding Source={x:Reference starFour},
+                  IsVisible="{Binding Source={x:Reference starFour},  Path=IsStarred}" />
-                                    Path=IsStarred}"/>
         </Grid>
         <Grid >
           <Grid.Behaviors>
@@ -73,9 +72,9 @@
 
           <Image x:Name="starSelectedFive"
                   Source="{extensions:ImageResource BookAStar.Images.Validation.star_selected.png}"
-                  IsVisible="{Binding Source={x:Reference starFive},
+                  IsVisible="{Binding Source={x:Reference starFive}, Path=IsStarred}" />
-                                    Path=IsStarred}"/>
         </Grid>
+          
       </StackLayout>
       <StackLayout>
         <StackLayout.Resources>
@@ -85,7 +84,7 @@
         </StackLayout.Resources>
         <Label Text="{Binding Source={x:Reference starFive}, Path=Rating, Converter={StaticResource ratingText}}" ></Label>
       </StackLayout>
-    </StackLayout>
+      </StackLayout>
       
   </ContentView.Content>
 </ContentView>