From 6cfa3ed4c12d79d6e0e94359f3207cea18574add Mon Sep 17 00:00:00 2001
From: Yan Maniez <yanmaniez@hotmail.com>
Date: Sun, 7 Apr 2019 18:41:18 +0200
Subject: [PATCH] Sub backgrounds

---
 .../AideDeJeu/Tools/NotifyTaskCompletion.cs   | 22 ++++----
 .../PlayerCharacterEditorViewModel.cs         | 55 +++++++++++++++++++
 .../ViewModels/PlayerCharacterViewModel.cs    | 12 ++++
 .../Views/PlayerCharacterEditorPage.xaml      |  6 +-
 4 files changed, 83 insertions(+), 12 deletions(-)

diff --git a/AideDeJeu/AideDeJeu/Tools/NotifyTaskCompletion.cs b/AideDeJeu/AideDeJeu/Tools/NotifyTaskCompletion.cs
index 02a75316..c93a5964 100644
--- a/AideDeJeu/AideDeJeu/Tools/NotifyTaskCompletion.cs
+++ b/AideDeJeu/AideDeJeu/Tools/NotifyTaskCompletion.cs
@@ -4,12 +4,12 @@ using System.Threading.Tasks;
 
 namespace AideDeJeu.Tools
 {
-    public sealed class NotifyTaskCompletion<TResult> : INotifyPropertyChanged
+    public class NotifyTaskCompletion<TResult> : INotifyPropertyChanged
     {
         public NotifyTaskCompletion(Task<TResult> task)
         {
             Task = task;
-            if (!task.IsCompleted)
+            if (task != null && !task.IsCompleted)
             {
                 var _ = WatchTaskAsync(task);
             }
@@ -51,22 +51,22 @@ namespace AideDeJeu.Tools
         {
             get
             {
-                return (Task.Status == TaskStatus.RanToCompletion) ? Task.Result : default(TResult);
+                return (Task?.Status == TaskStatus.RanToCompletion) ? Task.Result : default(TResult);
             }
         }
-        public TaskStatus Status { get { return Task.Status; } }
-        public bool IsCompleted { get { return Task.IsCompleted; } }
-        public bool IsNotCompleted { get { return !Task.IsCompleted; } }
+        public TaskStatus Status { get { return Task?.Status ?? TaskStatus.Running; } }
+        public bool IsCompleted { get { return Task?.IsCompleted ?? false; } }
+        public bool IsNotCompleted { get { return Task?.IsCompleted == true ? false : true; } }
         public bool IsSuccessfullyCompleted
         {
             get
             {
-                return Task.Status == TaskStatus.RanToCompletion;
+                return Task?.Status == TaskStatus.RanToCompletion;
             }
         }
-        public bool IsCanceled { get { return Task.IsCanceled; } }
-        public bool IsFaulted { get { return Task.IsFaulted; } }
-        public AggregateException Exception { get { return Task.Exception; } }
+        public bool IsCanceled { get { return Task?.IsCanceled ?? false; } }
+        public bool IsFaulted { get { return Task?.IsFaulted ?? false; } }
+        public AggregateException Exception { get { return Task?.Exception; } }
         public Exception InnerException
         {
             get
@@ -83,4 +83,4 @@ namespace AideDeJeu.Tools
         }
         public event PropertyChangedEventHandler PropertyChanged;
     }
-}
+}
\ No newline at end of file
diff --git a/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterEditorViewModel.cs b/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterEditorViewModel.cs
index b0effa79..8e93ba02 100644
--- a/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterEditorViewModel.cs
+++ b/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterEditorViewModel.cs
@@ -16,6 +16,7 @@ namespace AideDeJeu.ViewModels
             Races = new NotifyTaskCompletion<List<RaceItem>>(Task.Run(() => LoadRacesAsync()));
             Classes = new NotifyTaskCompletion<List<ClassItem>>(Task.Run(() => LoadClassesAsync()));
             Backgrounds = new NotifyTaskCompletion<List<BackgroundItem>>(Task.Run(() => LoadBackgroundsAsync()));
+            SubBackgrounds = new NotifyTaskCompletion<List<SubBackgroundItem>>(null);
         }
 
         public NotifyTaskCompletion<List<RaceItem>> Races { get; private set; }
@@ -64,8 +65,45 @@ namespace AideDeJeu.ViewModels
             {
                 SetProperty(ref _BackgroundSelectedIndex, value);
                 SelectedPlayerCharacter.Background = Backgrounds.Result[_BackgroundSelectedIndex];
+                SubBackgrounds = new NotifyTaskCompletion<List<SubBackgroundItem>>(Task.Run(() => LoadSubBackgroundsAsync(SelectedPlayerCharacter.Background)));
             }
         }
+
+        private NotifyTaskCompletion<List<SubBackgroundItem>> _SubBackgrounds = null;
+        public NotifyTaskCompletion<List<SubBackgroundItem>> SubBackgrounds
+        {
+            get
+            {
+                return _SubBackgrounds;
+            }
+            private set
+            {
+                SetProperty(ref _SubBackgrounds, value);
+            }
+        }
+
+        private int _SubBackgroundSelectedIndex = 0;
+        public int SubBackgroundSelectedIndex
+        {
+            get
+            {
+                return _SubBackgroundSelectedIndex;
+            }
+            set
+            {
+                SetProperty(ref _SubBackgroundSelectedIndex, value);
+                if(_SubBackgroundSelectedIndex == 0)
+                {
+                    SelectedPlayerCharacter.SubBackground = null;
+                    SubBackgroundSelectedIndex = -1;
+                }
+                else if(_SubBackgroundSelectedIndex > 0)
+                {
+                    SelectedPlayerCharacter.SubBackground = SubBackgrounds.Result[_SubBackgroundSelectedIndex];
+                }
+            }
+        }
+
         private PlayerCharacterViewModel _SelectedPlayerCharacter = new PlayerCharacterViewModel();
         public PlayerCharacterViewModel SelectedPlayerCharacter
         {
@@ -109,5 +147,22 @@ namespace AideDeJeu.ViewModels
                 return await context.Backgrounds.Where(b => b.GetType() == typeof(BackgroundItem)).OrderBy(b => Tools.Helpers.RemoveDiacritics(b.Name)).ToListAsync().ConfigureAwait(false);
             }
         }
+
+        public async Task<List<SubBackgroundItem>> LoadSubBackgroundsAsync(BackgroundItem background)
+        {
+            if (background != null)
+            {
+                using (var context = await StoreViewModel.GetLibraryContextAsync())
+                {
+                    var list = await context.SubBackgrounds.Where(item => item.ParentLink == background.Id).OrderBy(b => Tools.Helpers.RemoveDiacritics(b.Name)).ToListAsync().ConfigureAwait(false);
+                    list.Insert(0, null);
+                    return list;
+                }
+            }
+            else
+            {
+                return new List<SubBackgroundItem>();
+            }
+        }
     }
 }
diff --git a/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterViewModel.cs b/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterViewModel.cs
index 1676662f..264faef3 100644
--- a/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterViewModel.cs
+++ b/AideDeJeu/AideDeJeu/ViewModels/PlayerCharacterViewModel.cs
@@ -43,5 +43,17 @@ namespace AideDeJeu.ViewModels
                 SetProperty(ref _Background, value);
             }
         }
+        private SubBackgroundItem _SubBackground = null;
+        public SubBackgroundItem SubBackground
+        {
+            get
+            {
+                return _SubBackground;
+            }
+            set
+            {
+                SetProperty(ref _SubBackground, value);
+            }
+        }
     }
 }
diff --git a/AideDeJeu/AideDeJeu/Views/PlayerCharacterEditorPage.xaml b/AideDeJeu/AideDeJeu/Views/PlayerCharacterEditorPage.xaml
index 51b2911b..b0561cdf 100644
--- a/AideDeJeu/AideDeJeu/Views/PlayerCharacterEditorPage.xaml
+++ b/AideDeJeu/AideDeJeu/Views/PlayerCharacterEditorPage.xaml
@@ -53,8 +53,12 @@
     <ContentPage Title="Historique">
         <StackLayout>
             <Picker Title="Historique" HorizontalOptions="FillAndExpand" IsEnabled="{Binding Backgrounds.IsSuccessfullyCompleted}" ItemsSource="{Binding Backgrounds.Result}" ItemDisplayBinding="{Binding Name}" SelectedIndex="{Binding BackgroundSelectedIndex, Mode=TwoWay}" />
+            <Picker Title="Variante" HorizontalOptions="FillAndExpand" IsEnabled="{Binding SubBackgrounds.IsSuccessfullyCompleted}" ItemsSource="{Binding SubBackgrounds.Result}" ItemDisplayBinding="{Binding Name}" SelectedIndex="{Binding SubBackgroundSelectedIndex, Mode=TwoWay}" />
             <ScrollView Orientation="Vertical">
-                <mdview:MarkdownView Markdown="{Binding SelectedPlayerCharacter.Background.Markdown}" />
+                <StackLayout>
+                    <mdview:MarkdownView Markdown="{Binding SelectedPlayerCharacter.Background.Markdown}" />
+                    <mdview:MarkdownView Markdown="{Binding SelectedPlayerCharacter.SubBackground.Markdown}" />
+                </StackLayout>
             </ScrollView>
         </StackLayout>
     </ContentPage>