reuse code

src/iOS.Core/Views/ExtensionSearchDelegate.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Foundation;
+using UIKit;
+
+namespace Bit.iOS.Core.Views
+{
+    public class ExtensionSearchDelegate : UISearchBarDelegate
+    {
+        private readonly UITableView _tableView;
+        private CancellationTokenSource _filterResultsCancellationTokenSource;
+
+        public ExtensionSearchDelegate(UITableView tableView)
+        {
+            _tableView = tableView;
+        }
+
+        public override void TextChanged(UISearchBar searchBar, string searchText)
+        {
+            var cts = new CancellationTokenSource();
+            Task.Run(() =>
+            {
+                NSRunLoop.Main.BeginInvokeOnMainThread(async () =>
+                {
+                    if(!string.IsNullOrWhiteSpace(searchText))
+                    {
+                        await Task.Delay(300);
+                        if(searchText != searchBar.Text)
+                        {
+                            return;
+                        }
+                        else
+                        {
+                            _filterResultsCancellationTokenSource?.Cancel();
+                        }
+                    }
+                    try
+                    {
+                        ((ExtensionTableSource)_tableView.Source).FilterResults(searchText, cts.Token);
+                        _tableView.ReloadData();
+                    }
+                    catch(OperationCanceledException) { }
+                    _filterResultsCancellationTokenSource = cts;
+                });
+            }, cts.Token);
+        }
+    }
+}

src/iOS.Core/Views/ExtensionTableSource.cs

@@ -21,7 +21,6 @@ namespace Bit.iOS.Core.Views
         private const string CellIdentifier = "TableCell";
 
         private IEnumerable<CipherViewModel> _allItems = new List<CipherViewModel>();
-        protected IEnumerable<CipherViewModel> _tableItems = new List<CipherViewModel>();
         protected ICipherService _cipherService;
         protected ISettings _settings;
         private bool _accessPremium;
@@ -37,6 +36,8 @@ namespace Bit.iOS.Core.Views
             _controller = controller;
         }
 
+        public IEnumerable<CipherViewModel> Items { get; private set; }
+
         public async Task LoadItemsAsync(bool urlFilter = true, string searchFilter = null)
         {
             var combinedLogins = new List<Cipher>();
@@ -74,12 +75,12 @@ namespace Bit.iOS.Core.Views
 
             if(string.IsNullOrWhiteSpace(searchFilter))
             {
-                _tableItems = _allItems.ToList();
+                Items = _allItems.ToList();
             }
             else
             {
                 searchFilter = searchFilter.ToLower();
-                _tableItems = _allItems
+                Items = _allItems
                     .Where(s => s.Name.ToLower().Contains(searchFilter) ||
                         (s.Username?.ToLower().Contains(searchFilter) ?? false) ||
                         (s.Uris?.FirstOrDefault()?.Uri.ToLower().Contains(searchFilter) ?? false))
@@ -92,12 +93,12 @@ namespace Bit.iOS.Core.Views
 
         public override nint RowsInSection(UITableView tableview, nint section)
         {
-            return _tableItems == null || _tableItems.Count() == 0 ? 1 : _tableItems.Count();
+            return Items == null || Items.Count() == 0 ? 1 : Items.Count();
         }
 
         public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
         {
-            if(_tableItems == null || _tableItems.Count() == 0)
+            if(Items == null || Items.Count() == 0)
             {
                 var noDataCell = new UITableViewCell(UITableViewCellStyle.Default, "NoDataCell");
                 noDataCell.TextLabel.Text = AppResources.NoItemsTap;
@@ -121,17 +122,17 @@ namespace Bit.iOS.Core.Views
 
         public override void WillDisplay(UITableView tableView, UITableViewCell cell, NSIndexPath indexPath)
         {
-            if(_tableItems == null || _tableItems.Count() == 0 || cell == null)
+            if(Items == null || Items.Count() == 0 || cell == null)
             {
                 return;
             }
 
-            var item = _tableItems.ElementAt(indexPath.Row);
+            var item = Items.ElementAt(indexPath.Row);
             cell.TextLabel.Text = item.Name;
             cell.DetailTextLabel.Text = item.Username;
         }
 
-        protected string GetTotp(CipherViewModel item)
+        public string GetTotp(CipherViewModel item)
         {
             string totp = null;
             if(_accessPremium)

src/iOS.Core/iOS.Core.csproj

@@ -71,6 +71,7 @@
     <Compile Include="Views\SliderTableViewCell.cs" />
     <Compile Include="Views\SwitchTableViewCell.cs" />
     <Compile Include="Views\FormEntryTableViewCell.cs" />
+    <Compile Include="Views\ExtensionSearchDelegate.cs" />
     <Compile Include="Views\Toast.cs" />
     <Compile Include="Models\CipherViewModel.cs" />
     <Compile Include="Utilities\ASHelpers.cs" />