Add WPF Linking module support (#1192)

* Add WPF Linking module support

* Align coding style

Author: Kudo

ReactWindows/Playground.Net46/App.xaml.cs

@@ -1,4 +1,5 @@
-using System;
+using ReactNative.Modules.Launch;
+using System;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Navigation;
@@ -38,6 +39,8 @@ private void OnCreate(string[] arguments)
         {
             _reactPage.OnResume(Shutdown);
 
+            LauncherModule.SetActivatedUrl(String.Join(" ", arguments));
+
             var shellWindow = Application.Current.MainWindow;
 
             if (shellWindow == null)

ReactWindows/ReactNative.Net46/Modules/Launch/LauncherModule.cs

@@ -0,0 +1,164 @@
+using Newtonsoft.Json.Linq;
+using ReactNative.Bridge;
+using ReactNative.Modules.Core;
+using System;
+using System.Reactive.Subjects;
+using static System.FormattableString;
+
+namespace ReactNative.Modules.Launch
+{
+    /// <summary>
+    /// The module responsible for activating URIs and managing the initial launch URL. 
+    /// </summary>
+    public class LauncherModule : ReactContextNativeModuleBase, ILifecycleEventListener
+    {
+        private static readonly Subject<string> s_urlSubject = new Subject<string>();
+        private static string s_activatedUrl;
+
+        private bool _initialized;
+        private IDisposable _subscription;
+
+        /// <summary>
+        /// Instantiates the <see cref="LauncherModule"/>. 
+        /// </summary>
+        /// <param name="reactContext">The React context.</param>
+        public LauncherModule(ReactContext reactContext)
+            : base(reactContext)
+        {
+        }
+
+        /// <summary>
+        /// The name of the module.
+        /// </summary>
+        public override string Name
+        {
+            get
+            {
+                return "LinkingManager";
+            }
+        }
+
+        /// <summary>
+        /// Opens the given URL.
+        /// </summary>
+        /// <param name="url">The URL.</param>
+        /// <param name="promise">
+        /// The promise that should be resolved after the URL is opened.
+        /// </param>
+        [ReactMethod]
+        public async void openURL(string url, IPromise promise)
+        {
+            if (url == null)
+            {
+                promise.Reject(new ArgumentNullException(nameof(url)));
+                return;
+            }
+
+            var uri = default(Uri);
+            if (!Uri.TryCreate(url, UriKind.Absolute, out uri))
+            {
+                promise.Reject(new ArgumentException(Invariant($"URL argument '{uri}' is not valid.")));
+                return;
+            }
+
+            System.Diagnostics.Process.Start(uri.AbsoluteUri);
+            promise.Resolve(true);
+        }
+
+        /// <summary>
+        /// Checks if the application can open the given URL.
+        /// </summary>
+        /// <param name="url">The URL.</param>
+        /// <param name="promise">
+        /// The promise used to return the result of the check.
+        /// </param>
+        [ReactMethod]
+        public async void canOpenURL(string url, IPromise promise)
+        {
+            if (url == null)
+            {
+                promise.Reject(new ArgumentNullException(nameof(url)));
+                return;
+            }
+
+            var uri = default(Uri);
+            if (!Uri.TryCreate(url, UriKind.Absolute, out uri))
+            {
+                promise.Reject(new ArgumentException(Invariant($"URL argument '{uri}' is not valid.")));
+                return;
+            }
+
+            promise.Resolve(true);
+        }
+
+        /// <summary>
+        /// Gets the URL the application was launched with, or <code>null</code>
+        /// if the application was started normally.
+        /// </summary>
+        /// <param name="promise">
+        /// The promise used to return the initial URL.
+        /// </param>
+        [ReactMethod]
+        public void getInitialURL(IPromise promise)
+        {
+            promise.Resolve(s_activatedUrl);
+        }
+
+        /// <summary>
+        /// Called when the app is initialized.
+        /// </summary>
+        public override void Initialize()
+        {
+            _subscription = CreateUrlSubscription();
+            _initialized = true;
+        }
+
+        /// <summary>
+        /// Called when the app is being suspended.
+        /// </summary>
+        public void OnSuspend()
+        {
+            _subscription.Dispose();
+        }
+
+        /// <summary>
+        /// Called when the app is resumed.
+        /// </summary>
+        public void OnResume()
+        {
+            // Wait for initialization to subscribe to protect against sending
+            // events to a context that has not been fully initialized.
+            if (_initialized)
+            {
+                _subscription = CreateUrlSubscription();
+            }
+        }
+
+        /// <summary>
+        /// Called when the app is destroyed.
+        /// </summary>
+        public void OnDestroy()
+        {
+            _subscription.Dispose();
+        }
+
+        /// <summary>
+        /// The initial URL used to activate the application.
+        /// </summary>
+        public static void SetActivatedUrl(string url)
+        {
+            s_activatedUrl = url;
+            s_urlSubject.OnNext(url);
+        }
+
+        private IDisposable CreateUrlSubscription()
+        {
+            return s_urlSubject.Subscribe(url =>
+                Context.GetJavaScriptModule<RCTDeviceEventEmitter>()
+                    .emit("url", new JObject
+                    {
+                        { "url", url },
+                    }));
+        }
+    }
+}

ReactWindows/ReactNative.Net46/ReactNative.Net46.csproj

@@ -142,6 +142,7 @@
     <Compile Include="Modules\Dialog\DialogModule.cs" />
     <Compile Include="Modules\Image\BitmapImageHelpers.cs" />
     <Compile Include="Modules\Image\ImageLoaderModule.cs" />
+    <Compile Include="Modules\Launch\LauncherModule.cs" />
     <Compile Include="Modules\Storage\AsyncStorageModule.cs" />
     <Compile Include="Modules\Clipboard\ClipboardModule.cs" />
     <Compile Include="Modules\Clipboard\ClipboardInstance.cs" />

ReactWindows/ReactNative.Net46/Shell/MainReactPackage.cs

@@ -6,6 +6,7 @@
 using ReactNative.Modules.Dialog;
 using ReactNative.Modules.Image;
 using ReactNative.Modules.I18N;
+using ReactNative.Modules.Launch;
 using ReactNative.Modules.NetInfo;
 using ReactNative.Modules.Network;
 using ReactNative.Modules.Storage;
@@ -48,7 +49,7 @@ public IReadOnlyList<INativeModule> CreateNativeModules(ReactContext reactContex
                 new DialogModule(reactContext),
                 new ImageLoaderModule(),
                 new I18NModule(),
-                //new LauncherModule(reactContext),
+                new LauncherModule(reactContext),
                 //new LocationModule(reactContext),
                 new NativeAnimatedModule(reactContext),
                 new NetworkingModule(reactContext),

local-cli/generator-wpf/templates/src/App.xaml.cs

@@ -1,4 +1,5 @@
-using System;
+using ReactNative.Modules.Launch;
+using System;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Navigation;
@@ -37,7 +38,9 @@ protected override void OnStartup(StartupEventArgs e)
         private void OnCreate(string[] arguments)
         {
             _reactPage.OnResume(Shutdown);
-            
+
+            LauncherModule.SetActivatedUrl(String.Join(" ", arguments));
+
             var shellWindow = Application.Current.MainWindow;
 
             if (shellWindow == null)