feature: login support for Android

feature: display profile information

Pixiview/Illust/IllustCollectionPage.cs

@@ -73,9 +73,11 @@ namespace Pixiview.Illust
         protected readonly Command<IllustItem> commandIllustImageTapped;
         protected DateTime lastUpdated;
         protected double topOffset;
+        protected string lastError;
 
         private T illustData;
         private ParallelTask task;
+        private bool isTrying;
 
         public IllustCollectionPage()
         {
@@ -530,15 +532,31 @@ namespace Pixiview.Illust
             illustData = DoLoadIllustData(force);
             if (illustData == null)
             {
-                AppShell.Current.PushToLogin(()=>
+                if (isTrying)
                 {
-                    StartLoad(true);
-                });
+                    MainThread.BeginInvokeOnMainThread(() =>
+                    {
+                        DisplayAlert(ResourceHelper.Title,
+                            ResourceHelper.FailedResponse + "\n" + lastError?.Substring(0, 40),
+                            ResourceHelper.Ok);
+                    });
+                    isTrying = false;
+                }
+                else
+                {
+                    isTrying = true;
+                    AppShell.Current.PushToLogin(() =>
+                    {
+                        Task.Run(() => AppShell.Current.DoLoginInformation(true));
+                        StartLoad(true);
+                    });
+                }
                 //App.DebugError("illusts.load", "failed to load illusts data.");
                 IsLoading = false;
                 IsBottomLoading = false;
                 return;
             }
+            isTrying = false;
             if (force && IsFavoriteVisible)
             {
                 var now = DateTime.Now;

Pixiview/Illust/RankingPage.xaml.cs

@@ -160,7 +160,7 @@ namespace Pixiview.Illust
 
         protected override IllustRankingData DoLoadIllustData(bool force)
         {
-            var data = Stores.LoadIllustRankingData(lastQueryKey, queryDate, currentPage, force);
+            var data = Stores.LoadIllustRankingData(lastQueryKey, queryDate, currentPage, out lastError, force);
             if (data != null)
             {
                 if (int.TryParse(data.next, out int next))

Pixiview/Illust/ViewIllustPage.xaml.cs

@@ -331,16 +331,23 @@ namespace Pixiview.Illust
             }
 
             Illusts = items;
-            Task.Run(DoLoadImages);
+            Task.Run(() => DoLoadImages());
         }
 
-        private void DoLoadImages()
+        private void DoLoadImages(bool force = false)
         {
             var illustItem = IllustItem;
-            var pages = Stores.LoadIllustPageData(illustItem.Id);
+            var pages = Stores.LoadIllustPageData(illustItem.Id, out string error, force);
             if (pages == null)
             {
                 App.DebugError("illustPage.load", $"failed to load illust page data, id: {illustItem.Id}");
+                if (error != null)
+                {
+                    MainThread.BeginInvokeOnMainThread(() =>
+                    {
+                        DisplayAlert(ResourceHelper.Title, error, ResourceHelper.Ok);
+                    });
+                }
                 return;
             }
             var items = Illusts;
@@ -385,9 +392,13 @@ namespace Pixiview.Illust
                             var count = illustItem.PageCount;
                             pageCount = count;
                             Title = illustItem.Title;
-                            IsPageVisible = count > 1;
                             IsAnimateSliderVisible = illustItem.IsAnimeVisible;
-                            ProgressVisible = count > 1;
+                            if (count > 1)
+                            {
+                                IsPageVisible = true;
+                                ProgressVisible = true;
+                                PagePositionText = $"1/{count}";
+                            }
                         });
                         if (preload.user.TryGetValue(illust.userId, out var user))
                         {
@@ -423,6 +434,12 @@ namespace Pixiview.Illust
         private void DoLoadImage(int index, bool force = false)
         {
             var items = Illusts;
+            if (index == 0 && force)
+            {
+                // error, refresh all
+                Task.Run(() => DoLoadImages(true));
+                return;
+            }
             if (index < 0 || index >= items.Length)
             {
                 App.DebugPrint($"invalid index: {index}");