Fix Clipboard clear after time on iOS (#1679)

* Fixed Clipboard clear after x seconds depending on what the user set. Also refactored a bit to make the Clipboard a custom service to provide a better way to handle this situation #1464

* Clear some usings #1464

src/iOS.Core/Services/ClipboardService.cs

@@ -0,0 +1,40 @@
+using System.Threading.Tasks;
+using Bit.Core.Abstractions;
+using Foundation;
+using MobileCoreServices;
+using UIKit;
+using Xamarin.Forms;
+
+namespace Bit.iOS.Core.Services
+{
+    public class ClipboardService : IClipboardService
+    {
+        private readonly IStorageService _storageService;
+
+        public ClipboardService(IStorageService storageService)
+        {
+            _storageService = storageService;
+        }
+
+        public async Task CopyTextAsync(string text, int expiresInMs = -1)
+        {
+            int clearSeconds = -1;
+            if (expiresInMs < 0)
+            {
+                clearSeconds = await _storageService.GetAsync<int?>(Bit.Core.Constants.ClearClipboardKey) ?? -1;
+            }
+            else
+            {
+                clearSeconds = expiresInMs * 1000;
+            }
+
+            var dictArr = new NSDictionary<NSString, NSObject>[1];
+            dictArr[0] = new NSDictionary<NSString, NSObject>(new NSString(UTType.UTF8PlainText), new NSString(text));
+            Device.BeginInvokeOnMainThread(() => UIPasteboard.General.SetItems(dictArr, new UIPasteboardOptions
+            {
+                LocalOnly = true,
+                ExpirationDate = clearSeconds > 0 ? NSDate.FromTimeIntervalSinceNow(clearSeconds) : null
+            }));
+        }
+    }
+}

src/iOS.Core/Utilities/iOSCoreHelpers.cs

@@ -52,6 +52,7 @@ namespace Bit.iOS.Core.Utilities
             var cryptoPrimitiveService = new CryptoPrimitiveService();
             var mobileStorageService = new MobileStorageService(preferencesStorage, liteDbStorage);
             var deviceActionService = new DeviceActionService(mobileStorageService, messagingService);
+            var clipboardService = new ClipboardService(mobileStorageService);
             var platformUtilsService = new MobilePlatformUtilsService(deviceActionService, messagingService,
                 broadcasterService);
             var biometricService = new BiometricService(mobileStorageService);
@@ -67,6 +68,7 @@ namespace Bit.iOS.Core.Utilities
             ServiceContainer.Register<IStorageService>("storageService", mobileStorageService);
             ServiceContainer.Register<IStorageService>("secureStorageService", secureStorageService);
             ServiceContainer.Register<IDeviceActionService>("deviceActionService", deviceActionService);
+            ServiceContainer.Register<IClipboardService>("clipboardService", clipboardService);
             ServiceContainer.Register<IPlatformUtilsService>("platformUtilsService", platformUtilsService);
             ServiceContainer.Register<IBiometricService>("biometricService", biometricService);
             ServiceContainer.Register<ICryptoFunctionService>("cryptoFunctionService", cryptoFunctionService);

src/iOS.Core/iOS.Core.csproj

@@ -191,6 +191,7 @@
     <Compile Include="Views\Toast.cs" />
     <Compile Include="Renderers\SelectableLabelRenderer.cs" />
     <Compile Include="Effects\ScrollEnabledEffect.cs" />
+    <Compile Include="Services\ClipboardService.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\App\App.csproj">