Adding a letter history page to help users to remember the letters

src/Functions/SantaTalk.Models/Letter.cs

@@ -0,0 +1,10 @@
+using System;
+namespace SantaTalk.Models
+{
+    public class Letter
+    {
+        public string Sender { get; set; }
+        public string Receiver { get; set; }
+        public string Message { get; set; }
+    }
+}

src/Functions/SantaTalk.Models/SantaResultDisplay.cs

@@ -5,8 +5,13 @@
 namespace SantaTalk.Models
 {
     public class SantaResultDisplay
-    {        
+    {
         public string SentimentInterpretation { get; set; }
         public string GiftPrediction { get; set; }
+
+        public override string ToString()
+        {
+            return SentimentInterpretation + " " +  GiftPrediction;
+        }
     }
 }

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

@@ -4,4 +4,7 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="sqlite-net-pcl" Version="1.6.292" />
+  </ItemGroup>
 </Project>

src/SantaTalk.Android/SantaTalk.Android.csproj

@@ -69,6 +69,9 @@
     <PackageReference Include="Newtonsoft.Json">
       <Version>12.0.3</Version>
     </PackageReference>
+    <PackageReference Include="sqlite-net-pcl">
+      <Version>1.6.292</Version>
+    </PackageReference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="MainActivity.cs" />

src/SantaTalk.iOS/SantaTalk.iOS.csproj

@@ -139,6 +139,9 @@
     <PackageReference Include="Newtonsoft.Json">
       <Version>12.0.3</Version>
     </PackageReference>
+    <PackageReference Include="sqlite-net-pcl">
+      <Version>1.6.292</Version>
+    </PackageReference>
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
   <ItemGroup>

src/SantaTalk/LetterHistoryPage.xaml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="SantaTalk.LetterHistoryPage"
+             Title="History">
+    <ContentPage.Content>
+
+        <ListView
+            ItemsSource="{Binding Letters}"
+            VerticalOptions="FillAndExpand"
+            HasUnevenRows="True"
+            SeparatorVisibility="None">
+            <ListView.ItemTemplate>
+                <DataTemplate>
+                    <ViewCell>
+                        <StackLayout Padding="8">
+
+                            <StackLayout Orientation="Horizontal"
+                                     Spacing="8"
+                                     Grid.Row="0">
+                                <Label Text="Sender:"
+                                   TextColor="{StaticResource dark_gradient}"
+                                   FontAttributes="Bold"/>
+                                <Label Text="{Binding Sender}"
+                                   TextColor="{StaticResource dark_gradient}"/>
+                            </StackLayout>
+                            <StackLayout Orientation="Horizontal" Spacing="8"
+                                     Grid.Row="1">
+                                <Label Text="Receiver:"
+                                   TextColor="{StaticResource dark_gradient}"
+                                   FontAttributes="Bold"/>
+                                <Label Text="{Binding Receiver}"
+                                   TextColor="{StaticResource dark_gradient}" />
+                            </StackLayout>
+
+                            <StackLayout Orientation="Vertical"
+                                       Grid.Row="2">
+                                <Label Text="Message:"
+                                   TextColor="{StaticResource dark_gradient}"
+                                   FontAttributes="Bold" />
+                                <Label Text="{Binding Message}"
+                                   TextColor="{StaticResource dark_gradient}"/>
+                            </StackLayout>
+
+                        </StackLayout>
+                    </ViewCell>
+                </DataTemplate>
+            </ListView.ItemTemplate>
+        </ListView>
+    </ContentPage.Content>
+</ContentPage>

src/SantaTalk/LetterHistoryPage.xaml.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using SantaTalk.ViewModels;
+using Xamarin.Forms;
+
+namespace SantaTalk
+{
+    public partial class LetterHistoryPage : ContentPage
+    {
+        public LetterHistoryPage()
+        {
+            BindingContext = new LetterHistoryPageViewModel();
+            InitializeComponent();
+        }
+    }
+}

src/SantaTalk/MainPage.xaml

@@ -39,7 +39,12 @@
                             <Editor Text="{Binding LetterText}" TextColor="White"/>
                         </StackLayout>
                     </StackLayout>
-                    <Button VerticalOptions="EndAndExpand" Text="SEND TO SANTA" Margin="16" Command="{Binding SendLetterCommand}" />
+                    <StackLayout Margin="16"
+                                 VerticalOptions="EndAndExpand"
+                                 Spacing="16">
+                        <Button  Text="SEND TO SANTA" Command="{Binding SendLetterCommand}" />
+                        <Button  Text="HISTORY" Command="{Binding SeeHistoryCommand}" />  
+                    </StackLayout>
                 </StackLayout>
             </ScrollView>
         </Grid>

src/SantaTalk/ResultsPage.xaml

@@ -8,7 +8,7 @@
     x:Class="SantaTalk.ResultsPage"
     ios:Page.UseSafeArea="True"
     BackgroundColor="{StaticResource dark_gradient}"
-    NavigationPage.HasNavigationBar="False">
+    Title="Results">
 
     <ContentPage.Resources>
         <ResourceDictionary>

src/SantaTalk/SantaTalk.csproj

@@ -18,6 +18,7 @@
     <PackageReference Include="Xamarin.Forms.PancakeView" Version="1.3.6" />
     <PackageReference Include="Xamarin.Forms.StateSquid" Version="1.1.3" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="sqlite-net-pcl" Version="1.6.292" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Functions\SantaTalk.Models\SantaTalk.Models.csproj" />

src/SantaTalk/Services/LetterDeliveryService.cs

@@ -3,12 +3,20 @@
 using System.Threading.Tasks;
 using Newtonsoft.Json;
 using SantaTalk.Models;
+using SantaTalk.Services;
 using Xamarin.Essentials;
 
 namespace SantaTalk
 {
     public class LetterDeliveryService
     {
+        private LettersHistoryService _lettersHistoryService;
+
+        public LetterDeliveryService()
+        {
+            _lettersHistoryService = new LettersHistoryService();
+        }
+
         //string santaUrl = "{REPLACE WITH YOUR FUNCTION URL}/api/WriteSanta";
 
         string santaUrl = "http://localhost:7071/api/WriteSanta";
@@ -30,6 +38,8 @@ public async Task<SantaResults> WriteLetterToSanta(SantaLetter letter)
                 var httpResponse = await httpClient.PostAsync(santaUrl, new StringContent(letterJson));
 
                 results = JsonConvert.DeserializeObject<SantaResults>(await httpResponse.Content.ReadAsStringAsync());
+
+                _lettersHistoryService.SaveLetterAndResults(letter, results);
 
                 return results;
             }

src/SantaTalk/Services/LettersHistoryService.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using SantaTalk.Models;
+using SQLite;
+using SQLitePCL;
+
+namespace SantaTalk.Services
+{
+    public class LettersHistoryService
+    {
+        private SQLiteConnection _db;
+        private SantasCommentsService _santaResultDisplay;
+
+        public LettersHistoryService()
+        {
+            _santaResultDisplay = new SantasCommentsService();
+
+            var databasePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "MyData.db");
+            _db = new SQLiteConnection(databasePath);
+            _db.CreateTable<Letter>();
+        }
+
+        public IList<Letter> ListLetters()
+        {
+            return _db.Table<Letter>().ToList();
+        }
+
+        public void SaveLetterAndResults(SantaLetter letter, SantaResults results)
+        {
+            var santaResultDisplay = _santaResultDisplay.MakeGiftDecision(results);
+            var santaLetter = new Letter()
+            {
+                Message = letter.LetterText,
+                Receiver = "Santa",
+                Sender = letter.KidName
+            };
+
+            var resultsLetter = new Letter()
+            {
+                Message = santaResultDisplay.ToString(),
+                Sender = "Santa",
+                Receiver = results.KidName
+            };
+
+            _db.InsertAll(new List<Letter>() { santaLetter, resultsLetter }, true);
+        }
+    }
+}

src/SantaTalk/ViewModels/LetterHistoryPageViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using SantaTalk.Models;
+using SantaTalk.Services;
+
+namespace SantaTalk.ViewModels
+{
+    public class LetterHistoryPageViewModel
+    {        
+        public IList<Letter> Letters { get; set; }
+
+        public LetterHistoryPageViewModel()
+        {
+            var lettersService = new LettersHistoryService();
+            Letters = lettersService.ListLetters();
+        }
+    }
+}

src/SantaTalk/ViewModels/MainPageViewModel.cs

@@ -6,13 +6,18 @@
 namespace SantaTalk
 {
     public class MainPageViewModel : BaseViewModel
-    {
+    {        
         public MainPageViewModel()
-        {
+        {            
             SendLetterCommand = new Command(async () =>
             {
                 await Application.Current.MainPage.Navigation.PushAsync(new ResultsPage(KidsName, LetterText));
             });
+
+            SeeHistoryCommand = new Command(async () =>
+            {
+                await Application.Current.MainPage.Navigation.PushAsync(new LetterHistoryPage());
+            });
         }
 
         string kidsName;
@@ -30,5 +35,6 @@ public string LetterText
         }
 
         public ICommand SendLetterCommand { get; }
+        public ICommand SeeHistoryCommand { get; }
     }
 }