Cognitive Services -Text analytics as an Azure function

src/Functions/SantaTalk.Functions/ApiKeyServiceClientCredentials.cs

@@ -19,7 +19,7 @@ public override Task ProcessHttpRequestAsync(HttpRequestMessage request, Cancell
         {
             if (request == null)
             {
-                throw new ArgumentNullException("request");
+                throw new ArgumentNullException(nameof(request));
             }
             request.Headers.Add("Ocp-Apim-Subscription-Key", this.apiKey);
             return base.ProcessHttpRequestAsync(request, cancellationToken);

src/Functions/SantaTalk.Functions/SantaTalk.Functions.csproj

@@ -15,8 +15,7 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <None Update="local.settings.json">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
   </ItemGroup>
 </Project>

src/Functions/SantaTalk.Functions/SantaTalk.Functions.sln

@@ -0,0 +1,23 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SantaTalk.Functions", "SantaTalk.Functions.csproj", "{8B1596A8-6091-4F56-8CC1-181879196AF1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SantaTalk.Models", "..\SantaTalk.Models\SantaTalk.Models.csproj", "{4F60AC05-3995-43B7-827F-A47DC2764D6A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8B1596A8-6091-4F56-8CC1-181879196AF1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8B1596A8-6091-4F56-8CC1-181879196AF1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8B1596A8-6091-4F56-8CC1-181879196AF1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8B1596A8-6091-4F56-8CC1-181879196AF1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4F60AC05-3995-43B7-827F-A47DC2764D6A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4F60AC05-3995-43B7-827F-A47DC2764D6A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4F60AC05-3995-43B7-827F-A47DC2764D6A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4F60AC05-3995-43B7-827F-A47DC2764D6A}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

src/Functions/SantaTalk.Functions/WriteSanta.cs

@@ -17,13 +17,11 @@ namespace SantaTalk.Functions
 {
     public static class WriteSanta
     {
-        static TextAnalyticsClient textClient;
-
+        static readonly TextAnalyticsClient textClient;
         static WriteSanta()
         {
-            var keys = new ApiKeyServiceClientCredentials(Environment.GetEnvironmentVariable("APIKey"));
-
-            textClient = new TextAnalyticsClient(keys) { Endpoint = Environment.GetEnvironmentVariable("APIEndpoint") };
+            var credentials = new ApiKeyServiceClientCredentials(Environment.GetEnvironmentVariable("APIKey"));
+            textClient = new TextAnalyticsClient(credentials) { Endpoint = Environment.GetEnvironmentVariable("APIEndpoint") };
         }
 
         [FunctionName("WriteSanta")]

src/Functions/SantaTalk.Functions/local.settings.json

@@ -0,0 +1,10 @@
+{
+  "IsEncrypted": false,
+  "Values": {
+    "API_HOST": "https://configuredOnAzure.azurewebsites.net",
+    "END_POINT": "registers",
+    "APIKey": "6cf27ec5e0604d5b967fdb997f476443",
+    "APIEndpoint": "https://westcentralus.api.cognitive.microsoft.com/",
+    "FUNCTIONS_WORKER_RUNTIME": "dotnet"
+  }  
+}

src/SantaTalk.Android/SantaTalk.Android.csproj

@@ -52,7 +52,7 @@
     <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991265" />
+    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991477" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
     <PackageReference Include="Xamarin.FFImageLoading.Forms">
       <Version>2.4.11.982</Version>
@@ -64,7 +64,7 @@
       <Version>1.1.3</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms.PancakeView">
-      <Version>1.3.6</Version>
+      <Version>1.3.7</Version>
     </PackageReference>
     <PackageReference Include="Newtonsoft.Json">
       <Version>12.0.3</Version>

src/SantaTalk.iOS/SantaTalk.iOS.csproj

@@ -122,7 +122,7 @@
     <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991265" />
+    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991477" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
     <PackageReference Include="Xamarin.FFImageLoading.Forms">
       <Version>2.4.11.982</Version>
@@ -131,7 +131,7 @@
       <Version>1.3.0</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms.PancakeView">
-      <Version>1.3.6</Version>
+      <Version>1.3.7</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms.StateSquid">
       <Version>1.1.3</Version>

src/SantaTalk/App.xaml

@@ -27,7 +27,7 @@
             <Color x:Key="entry_background">#190336</Color>
             <Color x:Key="normal_text">#ffffff</Color>
             <Color x:Key="white">#ffffff</Color>
-
+            <Color x:Key="shell_background">#301536</Color>
             <!-- Controls -->
             <Style TargetType="{x:Type StackLayout}">
                 <Setter Property="Spacing" Value="0" />

src/SantaTalk/App.xaml.cs

@@ -1,6 +1,5 @@
 using System;
 using Xamarin.Forms;
-using Xamarin.Forms.Xaml;
 
 namespace SantaTalk
 {
@@ -9,14 +8,7 @@ public partial class App : Application
         public App()
         {
             InitializeComponent();
-
-            var navPage = new NavigationPage(new MainPage())
-            {
-                BarBackgroundColor = Color.FromHex("#301536"),
-                BarTextColor = Color.Wheat
-            };
-
-            MainPage = navPage;
+            MainPage = new AppShell();
         }
 
         protected override void OnStart()

src/SantaTalk/AppShell.xaml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Shell xmlns="http://xamarin.com/schemas/2014/forms"
+       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+       xmlns:views="clr-namespace:SantaTalk.Views"           
+       Shell.FlyoutBehavior="Disabled"
+       Shell.TitleColor="Wheat"
+       Shell.BackgroundColor="{StaticResource shell_background}"
+       x:Class="SantaTalk.AppShell">
+
+   <ShellContent Route="home"
+                      Title="Home"                      
+                      ContentTemplate="{DataTemplate views:MainPage}">
+   </ShellContent>
+</Shell>

src/SantaTalk/AppShell.xaml.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using Xamarin.Forms;
+
+namespace SantaTalk
+{
+    public partial class AppShell : Shell
+    {
+        public AppShell()
+        {
+            InitializeComponent();
+        }
+    }
+}

src/SantaTalk/SantaTalk.csproj

@@ -11,11 +11,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991265" />
+    <PackageReference Include="Xamarin.Forms" Version="4.4.0.991477" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
     <PackageReference Include="Xamarin.FFImageLoading.Forms" Version="2.4.11.982" />
     <PackageReference Include="Refractored.MvvmHelpers" Version="1.3.0" />
-    <PackageReference Include="Xamarin.Forms.PancakeView" Version="1.3.6" />
+    <PackageReference Include="Xamarin.Forms.PancakeView" Version="1.3.7" />
     <PackageReference Include="Xamarin.Forms.StateSquid" Version="1.1.3" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
   </ItemGroup>
@@ -25,5 +25,6 @@
   <ItemGroup>
     <Folder Include="Services\" />
     <Folder Include="ViewModels\" />
+    <Folder Include="Views\" />
   </ItemGroup>
 </Project>

src/SantaTalk/Services/LetterDeliveryService.cs

@@ -9,11 +9,10 @@ namespace SantaTalk
 {
     public class LetterDeliveryService
     {
-        //string santaUrl = "{REPLACE WITH YOUR FUNCTION URL}/api/WriteSanta";
-
-        string santaUrl = "http://localhost:7071/api/WriteSanta";
-        static HttpClient httpClient = new HttpClient();
+        string santaUrl = "https://xamarinazureSantaTalk-kumar.azurewebsites.net/api/WriteSanta?code=xxxxxxxxxxx";
+        //string santaUrl = "http://localhost:7071/api/WriteSanta";
 
+        static readonly HttpClient httpClient = new HttpClient();
         public async Task<SantaResults> WriteLetterToSanta(SantaLetter letter)
         {
             // if we're on the Android emulator, running functions locally, need to swap out the function url
@@ -22,7 +21,7 @@ public async Task<SantaResults> WriteLetterToSanta(SantaLetter letter)
                 santaUrl = "http://10.0.2.2:7071/api/WriteSanta";
             }
 
-            SantaResults results = null;
+            SantaResults results;
             try
             {
                 var letterJson = JsonConvert.SerializeObject(letter);

src/SantaTalk/ViewModels/MainPageViewModel.cs

@@ -1,18 +1,21 @@
 using System;
+using System.Text;
+using System.Threading.Tasks;
 using System.Windows.Input;
 using MvvmHelpers;
+using SantaTalk.Views;
 using Xamarin.Forms;
 
 namespace SantaTalk
 {
     public class MainPageViewModel : BaseViewModel
     {
+        public ICommand SendLetterCommand { get; private set; }
+
         public MainPageViewModel()
         {
-            SendLetterCommand = new Command(async () =>
-            {
-                await Application.Current.MainPage.Navigation.PushAsync(new ResultsPage(KidsName, LetterText));
-            });
+            SendLetterCommand = new Command(() =>
+            NavigateToResultPage().ConfigureAwait(false));
         }
 
         string kidsName;
@@ -29,6 +32,29 @@ public string LetterText
             set => SetProperty(ref letterText, value);
         }
 
-        public ICommand SendLetterCommand { get; }
+        async Task NavigateToResultPage()
+        {
+            var areFieldsValid = await AreFieldsValid(KidsName, LetterText);
+            if (!areFieldsValid)
+                return;
+
+            await Shell.Current.Navigation.PushAsync(new ResultsPage(KidsName, LetterText), true);
+        }
+
+        async Task<bool> AreFieldsValid(string name, string inputText)
+        {
+            var builder = new StringBuilder();
+
+            if (string.IsNullOrWhiteSpace(name))
+                builder.AppendLine("Please enter your name.");
+
+            else if (inputText.EndsWith("Dear Santa...", StringComparison.InvariantCultureIgnoreCase))
+                builder.AppendLine("Please write something...");
+
+            if (builder.Length != 0)
+                await Application.Current.MainPage.DisplayAlert("Invalid Field(s)", builder.ToString(), "Ok");
+
+            return builder.Length == 0;
+        }
     }
 }

src/SantaTalk/ViewModels/ResultsPageViewModel.cs

@@ -60,23 +60,31 @@ public async Task SendLetterToSanta()
                 LetterText = LetterText
             };
 
-            var letterService = new LetterDeliveryService();
-            var results = await letterService.WriteLetterToSanta(letter);
-
-            if (results.SentimentScore == -1)
+            try
             {
-                CurrentState = State.Error;
-                return;
-            }
+                var letterService = new LetterDeliveryService();
+                var results = await letterService.WriteLetterToSanta(letter);
+
+                if (results.SentimentScore.Equals(-1))
+                {
+                    CurrentState = State.Error;
+                    return;
+                }
 
-            var commentsService = new SantasCommentsService();
-            var comments = commentsService.MakeGiftDecision(results);
+                var commentsService = new SantasCommentsService();
+                var comments = commentsService.MakeGiftDecision(results);
 
-            SantasComment = comments.SentimentInterpretation;
-            GiftDecision = comments.GiftPrediction;
-            DetectedLanguage = results.DetectedLanguage;
+                SantasComment = comments.SentimentInterpretation;
+                GiftDecision = comments.GiftPrediction;
+                DetectedLanguage = results.DetectedLanguage;
 
-            CurrentState = State.Success;
+                CurrentState = State.Success;
+            }
+            catch(Exception ex)
+            {
+                currentState = State.Error;
+                Console.WriteLine(ex.Message);
+            }
         }
     }
 }

src/SantaTalk/MainPage.xaml → src/SantaTalk/Views/MainPage.xaml

@@ -7,12 +7,10 @@
     xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
     xmlns:controls="clr-namespace:Xamarin.Forms.PancakeView;assembly=Xamarin.Forms.PancakeView"
     xmlns:viewmodels="clr-namespace:SantaTalk"
-    mc:Ignorable="d"
-    NavigationPage.HasNavigationBar="False"
-    NavigationPage.BackButtonTitle=""
+    mc:Ignorable="d"    
     ios:Page.UseSafeArea="True"
-    BackgroundColor="{StaticResource dark_gradient}"
-    x:Class="SantaTalk.MainPage">
+    BackgroundColor="{StaticResource dark_gradient}"  
+    x:Class="SantaTalk.Views.MainPage">
 
     <ContentPage.BindingContext>
         <viewmodels:MainPageViewModel />