From 0c0baf1b10300f654f5656c42017a5fbd9651165 Mon Sep 17 00:00:00 2001
From: Oliver Hauff <ochauu@hotmail.com>
Date: Wed, 14 Jul 2021 22:39:31 +0200
Subject: [PATCH] Toggle either bike id input controls and lock management view
 implemented.

---
 TINK/TINK/View/FindBike/FindBikePage.xaml     |  9 ++++--
 .../Settings/PermissionToVisibleConverter.cs  |  2 +-
 .../FindBike/FindBikePageViewModel.cs         | 28 +++++++++++++++++--
 3 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/TINK/TINK/View/FindBike/FindBikePage.xaml b/TINK/TINK/View/FindBike/FindBikePage.xaml
index 3512b5f..c7bf28f 100644
--- a/TINK/TINK/View/FindBike/FindBikePage.xaml
+++ b/TINK/TINK/View/FindBike/FindBikePage.xaml
@@ -12,11 +12,14 @@
         <Frame>
             <StackLayout>
                 <Entry 
-                    Placeholder="Bike id hier eingeben"
+                    Placeholder="Fahrrad-Nummer bitte hier eingeben"
+                    IsVisible="{Binding IsSelectBikeVisible}"
                     Text="{Binding BikeIdUserInput}">
                 </Entry>
-                <Button
-                    Text="Wählen"
+                <Button                    
+                    Text="Rad Wählen"
+                    IsEnabled="{Binding IsSelectBikeEnabled}"
+                    IsVisible="{Binding IsSelectBikeVisible}"
                     Command="{Binding OnSelectBikeRequest}">
                 </Button>
                 <ListView
diff --git a/TINK/TINK/View/Settings/PermissionToVisibleConverter.cs b/TINK/TINK/View/Settings/PermissionToVisibleConverter.cs
index 9eb72e7..0713b19 100644
--- a/TINK/TINK/View/Settings/PermissionToVisibleConverter.cs
+++ b/TINK/TINK/View/Settings/PermissionToVisibleConverter.cs
@@ -27,7 +27,7 @@ namespace TINK.View.Settings
         /// <returns>Boolean value indicating whether object is visible or not.</returns>
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            return ((Permissions)(value)).HasFlag(VisibleFlag);
+            return ((Permissions)value).HasFlag(VisibleFlag);
         }
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
diff --git a/TINKLib/ViewModel/FindBike/FindBikePageViewModel.cs b/TINKLib/ViewModel/FindBike/FindBikePageViewModel.cs
index b7f11e6..dbd561c 100644
--- a/TINKLib/ViewModel/FindBike/FindBikePageViewModel.cs
+++ b/TINKLib/ViewModel/FindBike/FindBikePageViewModel.cs
@@ -29,13 +29,33 @@ namespace TINK.ViewModel.FindBike
 {
     public class FindBikePageViewModel : BikesViewModel, INotifyCollectionChanged, INotifyPropertyChanged
     {
+        private string bikeIdUserInput = string.Empty;
 
         /// <summary> Text entered by user to specify a bike.</summary>
-        public string BikeIdUserInput { get; set; }
+        public string BikeIdUserInput 
+        {
+            get => bikeIdUserInput;
+            set
+            {
+                if (value == bikeIdUserInput)
+                {
+                    return;
+                }
+
+                bikeIdUserInput = value;
+                base.OnPropertyChanged(new PropertyChangedEventArgs(nameof(IsSelectBikeEnabled)));
+            }
+        }
 
         /// <summary> Holds all bikes available.</summary>
         public BikeCollection Bikes { get; set; }
 
+        /// <summary> Do not allow to select bike if id is not set.</summary>
+        public bool IsSelectBikeEnabled => BikeIdUserInput != null && BikeIdUserInput.Length > 0;
+        
+        /// <summary> Hide id input fields as soon as bike is found.</summary>
+        public bool IsSelectBikeVisible => BikeCollection != null && BikeCollection.Count == 0;
+
         /// <summary>
         /// Constructs bike collection view model in case information about occupied bikes is available.
         /// </summary>
@@ -65,6 +85,10 @@ namespace TINK.ViewModel.FindBike
             ISmartDevice smartDevice,
             IViewService viewService) : base(p_oUser, permissions, bluetoothLE, runtimPlatform, isConnectedDelegate, connectorFactory, geolocation, lockService, polling, postAction, smartDevice, viewService, () => new MyBikeInUseStateInfoProvider())
         {
+            CollectionChanged += (sender, eventargs) =>
+            {
+                OnPropertyChanged(new PropertyChangedEventArgs(nameof(IsSelectBikeVisible)));
+            };
         }
 
         /// <summary>
@@ -87,7 +111,7 @@ namespace TINK.ViewModel.FindBike
         }
 
         /// <summary> Command object to bind select bike button to view model. </summary>
-        public System.Windows.Input.ICommand OnSelectBikeRequest =>  new Xamarin.Forms.Command(async () => await SelectBike());
+        public System.Windows.Input.ICommand OnSelectBikeRequest =>  new Xamarin.Forms.Command(async () => await SelectBike(), () => IsSelectBikeEnabled);
 
         /// <summary> Select a bike by ID</summary>
         public async Task SelectBike()