Episode 12: Firebase Auth and Firebase Analytics (excludes google-services.json - download from firebase console)

Author: LetsCreateSeries

TimeTrackerTutorial.Android/Properties/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.timetrackertutorial">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.letscreateseries.timetrackertutorial">
 	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
 	<application android:label="TimeTrackerTutorial.Android"></application>
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<uses-permission android:name="android.permission.INTERNET" />
 </manifest>

TimeTrackerTutorial.Android/Services/AccountService.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Threading.Tasks;
+using Firebase.Auth;
+using TimeTrackerTutorial.Droid.Services;
+using TimeTrackerTutorial.Services.Account;
+using Xamarin.Forms;
+
+[assembly: Dependency(typeof(AccountService))]
+namespace TimeTrackerTutorial.Droid.Services
+{
+    public class AccountService : IAccountService
+    {
+        public AccountService()
+        {
+        }
+
+        public Task<double> GetCurrentPayRateAsync()
+        {
+            return Task.FromResult(10d);
+        }
+
+        public Task<bool> LoginAsync(string username, string password)
+        {
+            var tcs = new TaskCompletionSource<bool>();
+            FirebaseAuth.Instance.SignInWithEmailAndPasswordAsync(username, password)
+                .ContinueWith((task) => OnAuthCompleted(task, tcs));
+            return tcs.Task;
+        }
+
+        private void OnAuthCompleted(Task task, TaskCompletionSource<bool> tcs)
+        {
+            if (task.IsCanceled || task.IsFaulted)
+            {
+                // something went wrong
+                tcs.SetResult(false);
+                return;
+            }
+            tcs.SetResult(true);
+        }
+    }
+}

TimeTrackerTutorial.Android/TimeTrackerTutorial.Android.csproj

@@ -55,12 +55,19 @@
   <ItemGroup>
     <PackageReference Include="Xamarin.Forms" Version="4.4.0.991265" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
+    <PackageReference Include="Xamarin.Firebase.Analytics">
+      <Version>60.1142.1</Version>
+    </PackageReference>
+    <PackageReference Include="Xamarin.Firebase.Auth">
+      <Version>60.1142.1</Version>
+    </PackageReference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="MainActivity.cs" />
     <Compile Include="Resources\Resource.designer.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Renderers\HoursProgressViewRenderer.cs" />
+    <Compile Include="Services\AccountService.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\AboutResources.txt" />
@@ -88,12 +95,16 @@
   <ItemGroup>
     <Folder Include="Resources\drawable\" />
     <Folder Include="Renderers\" />
+    <Folder Include="Services\" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\TimeTrackerTutorial\TimeTrackerTutorial.csproj">
       <Project>{764C33A9-C9F3-4D94-B945-3F2168473335}</Project>
       <Name>TimeTrackerTutorial</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <GoogleServicesJson Include="google-services.json" />
+  </ItemGroup>
  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
 </Project>

TimeTrackerTutorial/PageModels/Base/PageModelLocator.cs

@@ -31,7 +31,7 @@ static PageModelLocator()
 
             // Register Services (registered as Singletons by default)
             _container.Register<INavigationService, NavigationService>();
-            _container.Register<IAccountService, MockAccountService>();
+            _container.Register<IAccountService>(DependencyService.Get<IAccountService>());
             _container.Register<IStatementService, MockStatementService>();
             _container.Register<IWorkService, MockWorkService>();
         }
@@ -50,14 +50,35 @@ static void Register<TPageModel, TPage>() where TPageModel : PageModelBase where
 
         public static T Resolve<T>() where T : class
         {
-            return _container.Resolve<T>();
+            try
+            {
+                return _container.Resolve<T>();
+            }
+            catch (TinyIoCResolutionException e)
+            {
+                var message = e.Message;
+                System.Diagnostics.Debug.WriteLine(e.Message);
+
+                while (e.InnerException is TinyIoCResolutionException ex)
+                {
+                    message = ex.Message;
+                    System.Diagnostics.Debug.WriteLine("\t" + ex.Message);
+                    e = ex;
+                }
+#if DEBUG
+                App.Current.MainPage.DisplayAlert("Resolution Error", message, "Ok");
+#endif
+            }
+            return default(T);
         }
 
-        public static Page CreatePageFor(Type pageModelType)
+
+        public static Page CreatePageFor<TPageModelType>() where TPageModelType : PageModelBase
         {
+            Type pageModelType = typeof(TPageModelType);
             var pageType = _lookupTable[pageModelType];
             var page = (Page)Activator.CreateInstance(pageType);
-            var pageModel = _container.Resolve(pageModelType);
+            var pageModel = Resolve<TPageModelType>();
             page.BindingContext = pageModel;
             return page;
         }

TimeTrackerTutorial/Services/Navigation/NavigationService.cs

@@ -18,7 +18,7 @@ public Task GoBackAsync()
         public async Task NavigateToAsync<TPageModel>(object navigationData = null, bool setRoot = false)
             where TPageModel : PageModelBase
         {
-            Page page = PageModelLocator.CreatePageFor(typeof(TPageModel));
+            Page page = PageModelLocator.CreatePageFor<TPageModel>();
 
             if (setRoot)
             {