From 05ed9eeef39cc78cda9ce11f2146a4b36fc00504 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 19:42:48 +0300
Subject: [PATCH 01/13] Moved data store service

---
 UndoAssessment/UndoAssessment/App.xaml.cs                    | 1 +
 .../UndoAssessment/Services/{ => Storage}/IDataStore.cs      | 5 ++---
 .../UndoAssessment/Services/{ => Storage}/MockDataStore.cs   | 2 +-
 UndoAssessment/UndoAssessment/ViewModels/BaseViewModel.cs    | 1 +
 4 files changed, 5 insertions(+), 4 deletions(-)
 rename UndoAssessment/UndoAssessment/Services/{ => Storage}/IDataStore.cs (79%)
 rename UndoAssessment/UndoAssessment/Services/{ => Storage}/MockDataStore.cs (98%)

diff --git a/UndoAssessment/UndoAssessment/App.xaml.cs b/UndoAssessment/UndoAssessment/App.xaml.cs
index 254aae8..255d5d0 100644
--- a/UndoAssessment/UndoAssessment/App.xaml.cs
+++ b/UndoAssessment/UndoAssessment/App.xaml.cs
@@ -2,6 +2,7 @@
 using Xamarin.Forms;
 using Xamarin.Forms.Xaml;
 using UndoAssessment.Services;
+using UndoAssessment.Services.Storage;
 using UndoAssessment.Views;
 
 namespace UndoAssessment
diff --git a/UndoAssessment/UndoAssessment/Services/IDataStore.cs b/UndoAssessment/UndoAssessment/Services/Storage/IDataStore.cs
similarity index 79%
rename from UndoAssessment/UndoAssessment/Services/IDataStore.cs
rename to UndoAssessment/UndoAssessment/Services/Storage/IDataStore.cs
index ca75e0e..94461cc 100644
--- a/UndoAssessment/UndoAssessment/Services/IDataStore.cs
+++ b/UndoAssessment/UndoAssessment/Services/Storage/IDataStore.cs
@@ -1,8 +1,7 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
-namespace UndoAssessment.Services
+namespace UndoAssessment.Services.Storage
 {
     public interface IDataStore<T>
     {
diff --git a/UndoAssessment/UndoAssessment/Services/MockDataStore.cs b/UndoAssessment/UndoAssessment/Services/Storage/MockDataStore.cs
similarity index 98%
rename from UndoAssessment/UndoAssessment/Services/MockDataStore.cs
rename to UndoAssessment/UndoAssessment/Services/Storage/MockDataStore.cs
index f4a318a..993f510 100644
--- a/UndoAssessment/UndoAssessment/Services/MockDataStore.cs
+++ b/UndoAssessment/UndoAssessment/Services/Storage/MockDataStore.cs
@@ -4,7 +4,7 @@
 using System.Threading.Tasks;
 using UndoAssessment.Models;
 
-namespace UndoAssessment.Services
+namespace UndoAssessment.Services.Storage
 {
     public class MockDataStore : IDataStore<Item>
     {
diff --git a/UndoAssessment/UndoAssessment/ViewModels/BaseViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/BaseViewModel.cs
index e4ee974..fef0cda 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/BaseViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/BaseViewModel.cs
@@ -7,6 +7,7 @@
 
 using UndoAssessment.Models;
 using UndoAssessment.Services;
+using UndoAssessment.Services.Storage;
 
 namespace UndoAssessment.ViewModels
 {

From 3f60f9507c76518d8d7d097063ad9321d41dc746 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 19:43:54 +0300
Subject: [PATCH 02/13] Updated git ignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 8a30d25..972163d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 *.rsuser
 *.suo
 *.user
+*.idea
 *.userosscache
 *.sln.docstates
 

From e01641e7bf72851cbeed18cc41959de3cce47d97 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 19:47:20 +0300
Subject: [PATCH 03/13] Added task page to shell

---
 UndoAssessment/UndoAssessment/AppShell.xaml     |  1 +
 .../UndoAssessment/Views/TaskPage.xaml          | 17 +++++++++++++++++
 .../UndoAssessment/Views/TaskPage.xaml.cs       | 12 ++++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 UndoAssessment/UndoAssessment/Views/TaskPage.xaml
 create mode 100644 UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs

diff --git a/UndoAssessment/UndoAssessment/AppShell.xaml b/UndoAssessment/UndoAssessment/AppShell.xaml
index 9b3603b..e52642e 100644
--- a/UndoAssessment/UndoAssessment/AppShell.xaml
+++ b/UndoAssessment/UndoAssessment/AppShell.xaml
@@ -32,6 +32,7 @@
     <TabBar>
         <ShellContent Title="About" Icon="icon_about.png" Route="AboutPage" ContentTemplate="{DataTemplate local:AboutPage}" />
         <ShellContent Title="Browse" Icon="icon_feed.png" ContentTemplate="{DataTemplate local:ItemsPage}" />
+        <ShellContent Title="Task" Icon="icon_feed.png" ContentTemplate="{DataTemplate local:TaskPage}" />
     </TabBar>
 
     <!--
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
new file mode 100644
index 0000000..49759fa
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
@@ -0,0 +1,17 @@
+<?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="UndoAssessment.Views.TaskPage">
+    
+    <ContentPage.Content>
+        <StackLayout Padding="10"
+                     Spacing="10">
+            
+            <Button Text="Success"/>
+            <Button Text="Error"/>
+            
+        </StackLayout>
+    </ContentPage.Content>
+    
+</ContentPage>
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
new file mode 100644
index 0000000..cee37b9
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
@@ -0,0 +1,12 @@
+using Xamarin.Forms;
+
+namespace UndoAssessment.Views
+{
+    public partial class TaskPage : ContentPage
+    {
+        public TaskPage()
+        {
+            InitializeComponent();
+        }
+    }
+}
\ No newline at end of file

From 0f25278aef5db138b1bc3676e447616f72c104c7 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 19:51:10 +0300
Subject: [PATCH 04/13] Added api test buttons

---
 .../ViewModels/TaskViewModel.cs               | 46 +++++++++++++++++++
 .../UndoAssessment/Views/TaskPage.xaml        | 19 ++++----
 2 files changed, 57 insertions(+), 8 deletions(-)
 create mode 100644 UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs

diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
new file mode 100644
index 0000000..ff48fbe
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -0,0 +1,46 @@
+using System;
+using System.Diagnostics;
+using Xamarin.Forms;
+
+namespace UndoAssessment.ViewModels
+{
+    public class TaskViewModel : BaseViewModel
+    {
+        public Command SuccessCommand { get; }
+        public Command ErrorCommand { get; }
+
+        public TaskViewModel()
+        {
+            SuccessCommand = new Command(OnSuccessCommand);
+            ErrorCommand = new Command(OnErrorCommand);
+        }
+
+        private async void OnSuccessCommand()
+        {
+            try
+            {
+
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine(e);
+                if (Debugger.IsAttached)
+                    Debugger.Break();
+            }
+        }
+
+        private async void OnErrorCommand()
+        {
+            try
+            {
+                
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine(e);
+                if (Debugger.IsAttached)
+                    Debugger.Break();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
index 49759fa..7058826 100644
--- a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
@@ -2,16 +2,19 @@
 
 <ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-             x:Class="UndoAssessment.Views.TaskPage">
+             xmlns:local="clr-namespace:UndoAssessment.ViewModels"
+             Title="{Binding Title}"
+             x:Class="UndoAssessment.Views.TaskPage"
+             x:DataType="local:TaskViewModel">
     
-    <ContentPage.Content>
-        <StackLayout Padding="10"
-                     Spacing="10">
+    <StackLayout Padding="10"
+                 Spacing="10">
             
-            <Button Text="Success"/>
-            <Button Text="Error"/>
+        <Button Text="Success"
+                Command="{Binding  SuccessCommand}"/>
+        <Button Text="Error"
+                Command="{Binding  ErrorCommand}"/>
             
-        </StackLayout>
-    </ContentPage.Content>
+    </StackLayout>
     
 </ContentPage>
\ No newline at end of file

From 9f0433c36df2c62ffb8e33107f461f5ba42263ca Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:03:14 +0300
Subject: [PATCH 05/13] Added api interface and actual service

---
 UndoAssessment/UndoAssessment/App.xaml.cs     |  2 ++
 .../UndoAssessment/Models/ApiResponse.cs      | 11 ++++++++
 .../Services/Api/IApiService.cs               | 11 ++++++++
 .../Services/Api/TaskApiService.cs            | 26 +++++++++++++++++++
 .../ViewModels/TaskViewModel.cs               | 13 +++++++---
 .../UndoAssessment/Views/TaskPage.xaml.cs     |  2 ++
 6 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 UndoAssessment/UndoAssessment/Models/ApiResponse.cs
 create mode 100644 UndoAssessment/UndoAssessment/Services/Api/IApiService.cs
 create mode 100644 UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs

diff --git a/UndoAssessment/UndoAssessment/App.xaml.cs b/UndoAssessment/UndoAssessment/App.xaml.cs
index 255d5d0..5b3bfe5 100644
--- a/UndoAssessment/UndoAssessment/App.xaml.cs
+++ b/UndoAssessment/UndoAssessment/App.xaml.cs
@@ -2,6 +2,7 @@
 using Xamarin.Forms;
 using Xamarin.Forms.Xaml;
 using UndoAssessment.Services;
+using UndoAssessment.Services.Api;
 using UndoAssessment.Services.Storage;
 using UndoAssessment.Views;
 
@@ -15,6 +16,7 @@ public App ()
             InitializeComponent();
 
             DependencyService.Register<MockDataStore>();
+            DependencyService.Register<TaskApiService>();
             MainPage = new AppShell();
         }
 
diff --git a/UndoAssessment/UndoAssessment/Models/ApiResponse.cs b/UndoAssessment/UndoAssessment/Models/ApiResponse.cs
new file mode 100644
index 0000000..96df202
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Models/ApiResponse.cs
@@ -0,0 +1,11 @@
+using System;
+
+namespace UndoAssessment.Models
+{
+    public class ApiResponse
+    {
+        public string Message { get; set; }
+        public DateTime Date { get; set; }
+        public int ErrorCode { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Services/Api/IApiService.cs b/UndoAssessment/UndoAssessment/Services/Api/IApiService.cs
new file mode 100644
index 0000000..a176242
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Services/Api/IApiService.cs
@@ -0,0 +1,11 @@
+using System.Threading.Tasks;
+using UndoAssessment.Models;
+
+namespace UndoAssessment.Services.Api
+{
+    public interface IApiService
+    {
+        Task<ApiResponse> SuccessAsync();
+        Task<ApiResponse> ErrorAsync();
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs b/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs
new file mode 100644
index 0000000..c9fc86e
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs
@@ -0,0 +1,26 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+using UndoAssessment.Models;
+
+namespace UndoAssessment.Services.Api
+{
+    public class TaskApiService : IApiService
+    {
+        private readonly HttpClient _client;
+
+        public TaskApiService(HttpClient client)
+        {
+            _client = client;
+        }
+        
+        public Task<ApiResponse> SuccessAsync()
+        {
+            
+        }
+
+        public Task<ApiResponse> ErrorAsync()
+        {
+            
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
index ff48fbe..b037e68 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -1,11 +1,14 @@
 using System;
 using System.Diagnostics;
+using UndoAssessment.Services.Api;
 using Xamarin.Forms;
 
 namespace UndoAssessment.ViewModels
 {
     public class TaskViewModel : BaseViewModel
     {
+        private IApiService _apiService;
+        
         public Command SuccessCommand { get; }
         public Command ErrorCommand { get; }
 
@@ -13,13 +16,15 @@ public TaskViewModel()
         {
             SuccessCommand = new Command(OnSuccessCommand);
             ErrorCommand = new Command(OnErrorCommand);
+
+            _apiService = DependencyService.Resolve<IApiService>();
         }
 
-        private async void OnSuccessCommand()
+        private async void OnErrorCommand()
         {
             try
             {
-
+                var response = _apiService.ErrorAsync();
             }
             catch (Exception e)
             {
@@ -29,11 +34,11 @@ private async void OnSuccessCommand()
             }
         }
 
-        private async void OnErrorCommand()
+        private async void OnSuccessCommand()
         {
             try
             {
-                
+                var response = _apiService.SuccessAsync();
             }
             catch (Exception e)
             {
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
index cee37b9..3e943ed 100644
--- a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
@@ -1,3 +1,4 @@
+using UndoAssessment.ViewModels;
 using Xamarin.Forms;
 
 namespace UndoAssessment.Views
@@ -7,6 +8,7 @@ public partial class TaskPage : ContentPage
         public TaskPage()
         {
             InitializeComponent();
+            BindingContext = new TaskViewModel();
         }
     }
 }
\ No newline at end of file

From 7b16763ff64580a508ca07d0f0da562c4c2fddde Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:18:25 +0300
Subject: [PATCH 06/13] Added newton Json nuget

---
 UndoAssessment/UndoAssessment/UndoAssessment.csproj       | 1 +
 UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/UndoAssessment/UndoAssessment/UndoAssessment.csproj b/UndoAssessment/UndoAssessment/UndoAssessment.csproj
index 95a3587..05a5812 100644
--- a/UndoAssessment/UndoAssessment/UndoAssessment.csproj
+++ b/UndoAssessment/UndoAssessment/UndoAssessment.csproj
@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Xamarin.Forms" Version="5.0.0.2578" />  
     <PackageReference Include="Xamarin.Essentials" Version="1.7.6" />
   </ItemGroup>
diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
index b037e68..2b7fd05 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -24,7 +24,7 @@ private async void OnErrorCommand()
         {
             try
             {
-                var response = _apiService.ErrorAsync();
+                var response = await _apiService.ErrorAsync();
             }
             catch (Exception e)
             {
@@ -38,7 +38,7 @@ private async void OnSuccessCommand()
         {
             try
             {
-                var response = _apiService.SuccessAsync();
+                var response = await _apiService.SuccessAsync();
             }
             catch (Exception e)
             {

From 1de203553e63c3e2d0f259110657231abef46a40 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:20:03 +0300
Subject: [PATCH 07/13] Added string parsing ext

---
 .../UndoAssessment/Extensions/StringExtensions.cs     | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 UndoAssessment/UndoAssessment/Extensions/StringExtensions.cs

diff --git a/UndoAssessment/UndoAssessment/Extensions/StringExtensions.cs b/UndoAssessment/UndoAssessment/Extensions/StringExtensions.cs
new file mode 100644
index 0000000..42a861f
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Extensions/StringExtensions.cs
@@ -0,0 +1,11 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace UndoAssessment.Extensions
+{
+    public static class StringExtensions
+    {
+        public static T ParseAsJson<T>(this string str)
+            => JsonConvert.DeserializeObject<T>(str, converters: new JsonConverter[] { new IsoDateTimeConverter() });
+    }
+}
\ No newline at end of file

From 27e54192059e6693d149a0066840d5d64c90c7b6 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:21:06 +0300
Subject: [PATCH 08/13] Added http response parsing extensions

---
 .../Extensions/HttpResponseMessageExtensions.cs    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs

diff --git a/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs b/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs
new file mode 100644
index 0000000..53c7bef
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs
@@ -0,0 +1,14 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace UndoAssessment.Extensions
+{
+    public static class HttpResponseMessageExtensions
+    {
+        public static async Task<T> ReadContentAsJsonAsync<T>(this HttpResponseMessage message)
+            => (await message.ReadAsStringAsync()).ParseAsJson<T>();
+
+        public static Task<string> ReadAsStringAsync(this HttpResponseMessage message)
+            => message.Content.ReadAsStringAsync();
+    }
+}
\ No newline at end of file

From 54bbc0f394c8ce58a315d39809f51d2bea4b66b0 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:29:00 +0300
Subject: [PATCH 09/13] Added request builder and api service impl

---
 .../Extensions/HttpExtensions.cs              | 30 +++++++++
 .../Extensions/HttpRequestBuilder.cs          | 63 +++++++++++++++++++
 .../HttpResponseMessageExtensions.cs          |  3 +
 .../Services/Api/TaskApiService.cs            | 27 +++++---
 4 files changed, 114 insertions(+), 9 deletions(-)
 create mode 100644 UndoAssessment/UndoAssessment/Extensions/HttpExtensions.cs
 create mode 100644 UndoAssessment/UndoAssessment/Extensions/HttpRequestBuilder.cs

diff --git a/UndoAssessment/UndoAssessment/Extensions/HttpExtensions.cs b/UndoAssessment/UndoAssessment/Extensions/HttpExtensions.cs
new file mode 100644
index 0000000..2862571
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Extensions/HttpExtensions.cs
@@ -0,0 +1,30 @@
+using System.Net.Http;
+using System.Text;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace UndoAssessment.Extensions
+{
+    public static class HttpExtensions
+    {
+        public static HttpRequestBuilder CreateRequest(this HttpClient client)
+            => new HttpRequestBuilder(client);
+
+        public static HttpContent ToHttpContent(this object requestBody)
+        {
+            var result = default(HttpContent);
+            
+            if (requestBody is HttpContent content)
+            {
+                result = content;
+            }
+            else
+            {
+                var jsonString = JsonConvert.SerializeObject(requestBody ?? new object(), new IsoDateTimeConverter());
+                result = new StringContent(jsonString, Encoding.UTF8, "application/json");
+            }
+
+            return result;
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Extensions/HttpRequestBuilder.cs b/UndoAssessment/UndoAssessment/Extensions/HttpRequestBuilder.cs
new file mode 100644
index 0000000..e0a4f95
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Extensions/HttpRequestBuilder.cs
@@ -0,0 +1,63 @@
+using System;
+using System.Diagnostics;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace UndoAssessment.Extensions
+{
+    public class HttpRequestBuilder
+    {
+        private readonly HttpClient _client;
+
+        private HttpRequestMessage _buildingRequest;
+        private CancellationToken _cancellationToken;
+
+        public HttpRequestBuilder(HttpClient client)
+        {
+            _client = client;
+
+            _buildingRequest = new HttpRequestMessage();
+        }
+
+        public HttpRequestBuilder ByResource(string address, string resource, params object[] parameters)
+        {
+            var url = address + string.Format(resource, parameters);
+            _buildingRequest.RequestUri = new Uri(url);
+            return this;
+        }
+
+        public HttpRequestBuilder WithMethod(HttpMethod method)
+        {
+            _buildingRequest.Method = method;
+            return this;
+        }
+
+        public HttpRequestBuilder WithContent(object content)
+        {
+            _buildingRequest.Content = content.ToHttpContent();
+            return this;
+        }
+
+        public HttpRequestBuilder WithHeader(string type, string val)
+        {
+            _buildingRequest.Headers.Add(type, val);
+            return this;
+        }
+
+        public async Task<HttpResponseMessage> MakeRequestAsync()
+        {
+            try
+            {
+                return await _client.SendAsync(_buildingRequest, _cancellationToken);
+            }
+            catch (Exception e)
+            {
+                if (Debugger.IsAttached)
+                    Debugger.Break();
+                Console.WriteLine(e);
+                throw;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs b/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs
index 53c7bef..413cbb2 100644
--- a/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs
+++ b/UndoAssessment/UndoAssessment/Extensions/HttpResponseMessageExtensions.cs
@@ -5,6 +5,9 @@ namespace UndoAssessment.Extensions
 {
     public static class HttpResponseMessageExtensions
     {
+        public static async Task<T> ReadContentAsJsonAsync<T>(this Task<HttpResponseMessage> taskMessage)
+            => await (await taskMessage).ReadContentAsJsonAsync<T>();
+
         public static async Task<T> ReadContentAsJsonAsync<T>(this HttpResponseMessage message)
             => (await message.ReadAsStringAsync()).ParseAsJson<T>();
 
diff --git a/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs b/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs
index c9fc86e..dfb040f 100644
--- a/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs
+++ b/UndoAssessment/UndoAssessment/Services/Api/TaskApiService.cs
@@ -1,26 +1,35 @@
 using System.Net.Http;
 using System.Threading.Tasks;
+using UndoAssessment.Extensions;
 using UndoAssessment.Models;
 
 namespace UndoAssessment.Services.Api
 {
     public class TaskApiService : IApiService
     {
+        private const string ApiEndpoint = "https://malkarakundostagingpublicapi.azurewebsites.net";
+        
         private readonly HttpClient _client;
 
-        public TaskApiService(HttpClient client)
+        public TaskApiService()
         {
-            _client = client;
+            _client = new HttpClient();
         }
         
         public Task<ApiResponse> SuccessAsync()
-        {
-            
-        }
-
+            => _client
+                .CreateRequest()
+                .ByResource(ApiEndpoint, "/success")
+                .WithMethod(HttpMethod.Get)
+                .MakeRequestAsync()
+                .ReadContentAsJsonAsync<ApiResponse>();
+        
         public Task<ApiResponse> ErrorAsync()
-        {
-            
-        }
+            => _client
+                .CreateRequest()
+                .ByResource(ApiEndpoint, "/fail")
+                .WithMethod(HttpMethod.Get)
+                .MakeRequestAsync()
+                .ReadContentAsJsonAsync<ApiResponse>();
     }
 }
\ No newline at end of file

From c1b574fc49d9ee6ad86af60e8656d8007e0be0e8 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:31:43 +0300
Subject: [PATCH 10/13] Added dialogs nuget

---
 UndoAssessment/UndoAssessment.Android/MainActivity.cs | 3 ++-
 UndoAssessment/UndoAssessment/UndoAssessment.csproj   | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/UndoAssessment/UndoAssessment.Android/MainActivity.cs b/UndoAssessment/UndoAssessment.Android/MainActivity.cs
index ef6fa6e..e3fe800 100644
--- a/UndoAssessment/UndoAssessment.Android/MainActivity.cs
+++ b/UndoAssessment/UndoAssessment.Android/MainActivity.cs
@@ -1,5 +1,5 @@
 using System;
-
+using Acr.UserDialogs;
 using Android.App;
 using Android.Content.PM;
 using Android.Runtime;
@@ -16,6 +16,7 @@ protected override void OnCreate(Bundle savedInstanceState)
 
             Xamarin.Essentials.Platform.Init(this, savedInstanceState);
             global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
+            UserDialogs.Init(this);
             LoadApplication(new App());
         }
         public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
diff --git a/UndoAssessment/UndoAssessment/UndoAssessment.csproj b/UndoAssessment/UndoAssessment/UndoAssessment.csproj
index 05a5812..90a45b6 100644
--- a/UndoAssessment/UndoAssessment/UndoAssessment.csproj
+++ b/UndoAssessment/UndoAssessment/UndoAssessment.csproj
@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Acr.UserDialogs" Version="7.2.0.564" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Xamarin.Forms" Version="5.0.0.2578" />  
     <PackageReference Include="Xamarin.Essentials" Version="1.7.6" />

From 00593c00fdfc8b8d033b8248df3608ed9676f885 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:37:28 +0300
Subject: [PATCH 11/13] Showing results of api calls

---
 UndoAssessment/UndoAssessment/App.xaml.cs     |  2 ++
 .../UndoAssessment/Models/ApiResponse.cs      | 10 ++++++++++
 .../Services/Dialogs/IDialogsService.cs       |  9 +++++++++
 .../Services/Dialogs/UserDialogsService.cs    | 20 +++++++++++++++++++
 .../ViewModels/TaskViewModel.cs               |  5 +++++
 5 files changed, 46 insertions(+)
 create mode 100644 UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
 create mode 100644 UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs

diff --git a/UndoAssessment/UndoAssessment/App.xaml.cs b/UndoAssessment/UndoAssessment/App.xaml.cs
index 5b3bfe5..5e8b489 100644
--- a/UndoAssessment/UndoAssessment/App.xaml.cs
+++ b/UndoAssessment/UndoAssessment/App.xaml.cs
@@ -3,6 +3,7 @@
 using Xamarin.Forms.Xaml;
 using UndoAssessment.Services;
 using UndoAssessment.Services.Api;
+using UndoAssessment.Services.Dialogs;
 using UndoAssessment.Services.Storage;
 using UndoAssessment.Views;
 
@@ -17,6 +18,7 @@ public App ()
 
             DependencyService.Register<MockDataStore>();
             DependencyService.Register<TaskApiService>();
+            DependencyService.Register<UserDialogsService>();
             MainPage = new AppShell();
         }
 
diff --git a/UndoAssessment/UndoAssessment/Models/ApiResponse.cs b/UndoAssessment/UndoAssessment/Models/ApiResponse.cs
index 96df202..e428507 100644
--- a/UndoAssessment/UndoAssessment/Models/ApiResponse.cs
+++ b/UndoAssessment/UndoAssessment/Models/ApiResponse.cs
@@ -7,5 +7,15 @@ public class ApiResponse
         public string Message { get; set; }
         public DateTime Date { get; set; }
         public int ErrorCode { get; set; }
+
+        public override string ToString()
+        {
+            var errorLine = ErrorCode > 0 ? $"ErrorCode: {ErrorCode}" : "";
+            return
+                $"Message: {Message}\n" +
+                $"Date: {Date.ToString()}\n" +
+                errorLine;
+                
+        }
     }
 }
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs b/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
new file mode 100644
index 0000000..4c70337
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
@@ -0,0 +1,9 @@
+using System.Threading.Tasks;
+
+namespace UndoAssessment.Services.Dialogs
+{
+    public interface IDialogsService
+    {
+        Task AlertAsync(string message);
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs b/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs
new file mode 100644
index 0000000..12f066c
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs
@@ -0,0 +1,20 @@
+using System.Threading.Tasks;
+using Acr.UserDialogs;
+
+namespace UndoAssessment.Services.Dialogs
+{
+    public class UserDialogsService : IDialogsService
+    {
+        private readonly IUserDialogs _userDialogs;
+
+        public UserDialogsService()
+        {
+            _userDialogs = UserDialogs.Instance;
+        }
+        
+        public Task AlertAsync(string message)
+        {
+            return _userDialogs.AlertAsync(message, "Api Call");
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
index 2b7fd05..ca7676f 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using UndoAssessment.Services.Api;
+using UndoAssessment.Services.Dialogs;
 using Xamarin.Forms;
 
 namespace UndoAssessment.ViewModels
@@ -8,6 +9,7 @@ namespace UndoAssessment.ViewModels
     public class TaskViewModel : BaseViewModel
     {
         private IApiService _apiService;
+        private IDialogsService _dialogsService;
         
         public Command SuccessCommand { get; }
         public Command ErrorCommand { get; }
@@ -18,6 +20,7 @@ public TaskViewModel()
             ErrorCommand = new Command(OnErrorCommand);
 
             _apiService = DependencyService.Resolve<IApiService>();
+            _dialogsService = DependencyService.Resolve<IDialogsService>();
         }
 
         private async void OnErrorCommand()
@@ -25,6 +28,7 @@ private async void OnErrorCommand()
             try
             {
                 var response = await _apiService.ErrorAsync();
+                await _dialogsService.AlertAsync(response.ToString());
             }
             catch (Exception e)
             {
@@ -39,6 +43,7 @@ private async void OnSuccessCommand()
             try
             {
                 var response = await _apiService.SuccessAsync();
+                await _dialogsService.AlertAsync(response.ToString());
             }
             catch (Exception e)
             {

From a647ec4c172518aa7fa5e671ec7de77fb0020ad9 Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 20:39:41 +0300
Subject: [PATCH 12/13] Fixed title for allert

---
 .../UndoAssessment/Services/Dialogs/IDialogsService.cs        | 2 +-
 .../UndoAssessment/Services/Dialogs/UserDialogsService.cs     | 4 ++--
 UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs     | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs b/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
index 4c70337..8576f59 100644
--- a/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
+++ b/UndoAssessment/UndoAssessment/Services/Dialogs/IDialogsService.cs
@@ -4,6 +4,6 @@ namespace UndoAssessment.Services.Dialogs
 {
     public interface IDialogsService
     {
-        Task AlertAsync(string message);
+        Task AlertAsync(string title, string message);
     }
 }
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs b/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs
index 12f066c..0cf4e5a 100644
--- a/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs
+++ b/UndoAssessment/UndoAssessment/Services/Dialogs/UserDialogsService.cs
@@ -12,9 +12,9 @@ public UserDialogsService()
             _userDialogs = UserDialogs.Instance;
         }
         
-        public Task AlertAsync(string message)
+        public Task AlertAsync(string title, string message)
         {
-            return _userDialogs.AlertAsync(message, "Api Call");
+            return _userDialogs.AlertAsync(message, title);
         }
     }
 }
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
index ca7676f..2f946a9 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -28,7 +28,7 @@ private async void OnErrorCommand()
             try
             {
                 var response = await _apiService.ErrorAsync();
-                await _dialogsService.AlertAsync(response.ToString());
+                await _dialogsService.AlertAsync(response.Message, response.ToString());
             }
             catch (Exception e)
             {
@@ -43,7 +43,7 @@ private async void OnSuccessCommand()
             try
             {
                 var response = await _apiService.SuccessAsync();
-                await _dialogsService.AlertAsync(response.ToString());
+                await _dialogsService.AlertAsync(response.Message, response.ToString());
             }
             catch (Exception e)
             {

From 5677cc35481fcfe488e83c7b69e7eabd1a86118c Mon Sep 17 00:00:00 2001
From: Mark Iliiev <ilievmarik@gmail.com>
Date: Sun, 9 Jul 2023 21:19:34 +0300
Subject: [PATCH 13/13] Added user data page form with result fields

---
 .../UndoAssessment/AppShell.xaml.cs           |  6 ++--
 .../UndoAssessment/Models/UserData.cs         |  8 +++++
 .../ViewModels/TaskViewModel.cs               | 33 ++++++++++++++---
 .../ViewModels/UserDataFormViewModel.cs       | 35 ++++++++++++++++++
 .../UndoAssessment/Views/TaskPage.xaml        | 14 ++++++++
 .../UndoAssessment/Views/TaskPage.xaml.cs     | 10 +++++-
 .../Views/UserDataFormPage.xaml               | 36 +++++++++++++++++++
 .../Views/UserDataFormPage.xaml.cs            | 14 ++++++++
 8 files changed, 147 insertions(+), 9 deletions(-)
 create mode 100644 UndoAssessment/UndoAssessment/Models/UserData.cs
 create mode 100644 UndoAssessment/UndoAssessment/ViewModels/UserDataFormViewModel.cs
 create mode 100644 UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml
 create mode 100644 UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml.cs

diff --git a/UndoAssessment/UndoAssessment/AppShell.xaml.cs b/UndoAssessment/UndoAssessment/AppShell.xaml.cs
index abbe3ed..ee5b242 100644
--- a/UndoAssessment/UndoAssessment/AppShell.xaml.cs
+++ b/UndoAssessment/UndoAssessment/AppShell.xaml.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using UndoAssessment.ViewModels;
-using UndoAssessment.Views;
+using UndoAssessment.Views;
 using Xamarin.Forms;
 
 namespace UndoAssessment
@@ -13,6 +10,7 @@ public AppShell()
             InitializeComponent();
             Routing.RegisterRoute(nameof(ItemDetailPage), typeof(ItemDetailPage));
             Routing.RegisterRoute(nameof(NewItemPage), typeof(NewItemPage));
+            Routing.RegisterRoute(nameof(UserDataFormPage), typeof(UserDataFormPage));
         }
 
     }
diff --git a/UndoAssessment/UndoAssessment/Models/UserData.cs b/UndoAssessment/UndoAssessment/Models/UserData.cs
new file mode 100644
index 0000000..55ece7b
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Models/UserData.cs
@@ -0,0 +1,8 @@
+namespace UndoAssessment.Models
+{
+    public class UserData
+    {
+        public string Name { get; set; }
+        public int Age { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
index 2f946a9..86a14f9 100644
--- a/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
+++ b/UndoAssessment/UndoAssessment/ViewModels/TaskViewModel.cs
@@ -1,16 +1,24 @@
 using System;
 using System.Diagnostics;
+using UndoAssessment.Models;
 using UndoAssessment.Services.Api;
 using UndoAssessment.Services.Dialogs;
+using UndoAssessment.Views;
 using Xamarin.Forms;
 
 namespace UndoAssessment.ViewModels
 {
     public class TaskViewModel : BaseViewModel
     {
+        //This is awful, but without normal navigation service hardly to get back some results
+        public static UserData UserData;
+        
         private IApiService _apiService;
         private IDialogsService _dialogsService;
         
+        public bool IsUserDataCreated { get; set; }
+        public UserData User { get; set; }
+        public Command UpdateUserDataCommand { get; }
         public Command SuccessCommand { get; }
         public Command ErrorCommand { get; }
 
@@ -18,16 +26,20 @@ public TaskViewModel()
         {
             SuccessCommand = new Command(OnSuccessCommand);
             ErrorCommand = new Command(OnErrorCommand);
+            UpdateUserDataCommand = new Command(OnUpdateUserDataCommand);
+            
+            IsUserDataCreated = false;
+            User = UserData;
 
             _apiService = DependencyService.Resolve<IApiService>();
             _dialogsService = DependencyService.Resolve<IDialogsService>();
         }
 
-        private async void OnErrorCommand()
+        private async void OnSuccessCommand()
         {
             try
             {
-                var response = await _apiService.ErrorAsync();
+                var response = await _apiService.SuccessAsync();
                 await _dialogsService.AlertAsync(response.Message, response.ToString());
             }
             catch (Exception e)
@@ -38,11 +50,11 @@ private async void OnErrorCommand()
             }
         }
 
-        private async void OnSuccessCommand()
+        private async void OnErrorCommand()
         {
             try
             {
-                var response = await _apiService.SuccessAsync();
+                var response = await _apiService.ErrorAsync();
                 await _dialogsService.AlertAsync(response.Message, response.ToString());
             }
             catch (Exception e)
@@ -52,5 +64,18 @@ private async void OnSuccessCommand()
                     Debugger.Break();
             }
         }
+
+        private async void OnUpdateUserDataCommand()
+        {
+            await Shell.Current.GoToAsync(nameof(UserDataFormPage));
+        }
+
+        public void OnAppearing()
+        {
+            User = UserData;
+            IsUserDataCreated = User != null;
+            OnPropertyChanged(nameof(IsUserDataCreated));
+            OnPropertyChanged(nameof(User));
+        }
     }
 }
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/ViewModels/UserDataFormViewModel.cs b/UndoAssessment/UndoAssessment/ViewModels/UserDataFormViewModel.cs
new file mode 100644
index 0000000..a13b699
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/ViewModels/UserDataFormViewModel.cs
@@ -0,0 +1,35 @@
+using UndoAssessment.Models;
+using Xamarin.Forms;
+
+namespace UndoAssessment.ViewModels
+{
+    public class UserDataFormViewModel : BaseViewModel
+    {
+        public string Name { get; set; }
+        public int Age { get; set; }
+        public Command SaveCommand { get; }
+        public Command CancelCommand { get; }
+
+        public UserDataFormViewModel()
+        {
+            SaveCommand = new Command(OnSaveCommand);
+            CancelCommand = new Command(OnCancelCommand);
+        }
+
+        private async void OnCancelCommand()
+        {
+            await Shell.Current.GoToAsync("..");
+        }
+
+        private async void OnSaveCommand()
+        {
+            TaskViewModel.UserData = new UserData
+            {
+                Name = Name,
+                Age = Age
+            };
+            
+            await Shell.Current.GoToAsync("..");
+        }
+    }
+}
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
index 7058826..9d29951 100644
--- a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml
@@ -7,11 +7,25 @@
              x:Class="UndoAssessment.Views.TaskPage"
              x:DataType="local:TaskViewModel">
     
+    <ContentPage.ToolbarItems>
+        
+        <ToolbarItem Text="Add user data"
+                     Command="{Binding UpdateUserDataCommand}" />
+        
+    </ContentPage.ToolbarItems>
+    
     <StackLayout Padding="10"
                  Spacing="10">
+        
+        <Label IsVisible="{Binding IsUserDataCreated}"
+               Text="{Binding User.Name, StringFormat='Name: {0}'}"/>
+        
+        <Label IsVisible="{Binding IsUserDataCreated}"
+               Text="{Binding User.Age, StringFormat='Age: {0}'}"/>
             
         <Button Text="Success"
                 Command="{Binding  SuccessCommand}"/>
+        
         <Button Text="Error"
                 Command="{Binding  ErrorCommand}"/>
             
diff --git a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
index 3e943ed..8e2d777 100644
--- a/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
+++ b/UndoAssessment/UndoAssessment/Views/TaskPage.xaml.cs
@@ -5,10 +5,18 @@ namespace UndoAssessment.Views
 {
     public partial class TaskPage : ContentPage
     {
+        private TaskViewModel _viewModel;
+        
         public TaskPage()
         {
             InitializeComponent();
-            BindingContext = new TaskViewModel();
+            BindingContext = _viewModel = new TaskViewModel();
+        }
+
+        protected override void OnAppearing()
+        {
+            base.OnAppearing();
+            _viewModel.OnAppearing();
         }
     }
 }
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml b/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml
new file mode 100644
index 0000000..8ad445a
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:UndoAssessment.ViewModels"
+             Title="Add user data"
+             xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
+             ios:Page.UseSafeArea="true"
+             Shell.PresentationMode="ModalAnimated"
+             x:Class="UndoAssessment.Views.UserDataFormPage"
+             x:DataType="local:UserDataFormViewModel">
+    
+    <StackLayout Spacing="10"
+                 Padding="10">
+            
+        <Label Text="Name:"/>
+        <Entry Text="{Binding Name, Mode=TwoWay}"/>
+        
+        <Label Text="Age:"/>
+        <Editor Text="{Binding Age, Mode=TwoWay}"/>
+        
+        <StackLayout Orientation="Horizontal">
+            
+            <Button Text="Cancel"
+                    Command="{Binding CancelCommand}"
+                    HorizontalOptions="FillAndExpand"/>
+            
+            <Button Text="Save"
+                    Command="{Binding SaveCommand}"
+                    HorizontalOptions="FillAndExpand"/>
+            
+        </StackLayout>
+            
+    </StackLayout>
+    
+</ContentPage>
\ No newline at end of file
diff --git a/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml.cs b/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml.cs
new file mode 100644
index 0000000..124636a
--- /dev/null
+++ b/UndoAssessment/UndoAssessment/Views/UserDataFormPage.xaml.cs
@@ -0,0 +1,14 @@
+using UndoAssessment.ViewModels;
+using Xamarin.Forms;
+
+namespace UndoAssessment.Views
+{
+    public partial class UserDataFormPage : ContentPage
+    {
+        public UserDataFormPage()
+        {
+            InitializeComponent();
+            BindingContext = new UserDataFormViewModel();
+        }
+    }
+}
\ No newline at end of file