First task

UndoAssessment.sln

@@ -1,60 +1,61 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 25.0.1705.6
+# Visual Studio Version 17
+VisualStudioVersion = 17.6.33723.286
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UndoAssessment.Android", "UndoAssessment\UndoAssessment.Android\UndoAssessment.Android.csproj", "{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UndoAssessment.iOS", "UndoAssessment\UndoAssessment.iOS\UndoAssessment.iOS.csproj", "{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UndoAssessment", "UndoAssessment\UndoAssessment\UndoAssessment.csproj", "{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UndoAssessment", "UndoAssessment\UndoAssessment\UndoAssessment.csproj", "{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-		Debug|iPhoneSimulator = Debug|iPhoneSimulator
-		Release|iPhoneSimulator = Release|iPhoneSimulator
 		Debug|iPhone = Debug|iPhone
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|Any CPU = Release|Any CPU
 		Release|iPhone = Release|iPhone
+		Release|iPhoneSimulator = Release|iPhoneSimulator
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|Any CPU.Build.0 = Release|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
-		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhone.ActiveCfg = Debug|Any CPU
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhone.ActiveCfg = Release|Any CPU
 		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhone.Build.0 = Release|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{B08F8340-7FAF-4AB2-A9DA-BA5B14FE5FDE}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|Any CPU.ActiveCfg = Debug|iPhoneSimulator
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|Any CPU.Build.0 = Debug|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|Any CPU.ActiveCfg = Release|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|Any CPU.Build.0 = Release|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
-		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhone.ActiveCfg = Debug|iPhone
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhone.Build.0 = Debug|iPhone
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|Any CPU.ActiveCfg = Release|iPhoneSimulator
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|Any CPU.Build.0 = Release|iPhoneSimulator
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhone.ActiveCfg = Release|iPhone
 		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhone.Build.0 = Release|iPhone
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{4F77CCCB-68DC-4CC7-A528-DB6FF48741D0}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
-		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhone.ActiveCfg = Debug|Any CPU
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|Any CPU.Build.0 = Release|Any CPU
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhone.ActiveCfg = Release|Any CPU
 		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhone.Build.0 = Release|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{7ED4972A-D279-4E63-B4F5-3D15590D4AA1}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

UndoAssessment/UndoAssessment/App.xaml.cs

@@ -1,31 +1,32 @@
-using System;
+using UndoAssessment.Services;
+using UndoAssessment.Services.DataProvider;
 using Xamarin.Forms;
-using Xamarin.Forms.Xaml;
-using UndoAssessment.Services;
-using UndoAssessment.Views;
 
 namespace UndoAssessment
 {
     public partial class App : Application
     {
 
-        public App ()
+        public App()
         {
             InitializeComponent();
 
-            DependencyService.Register<MockDataStore>();
+            DependencyService.Register<MockItemDataStore>();
+            DependencyService.Register<MockUserDataStore>();
+            DependencyService.Register<DataProvider>();
+
             MainPage = new AppShell();
         }
 
-        protected override void OnStart ()
+        protected override void OnStart()
         {
         }
 
-        protected override void OnSleep ()
+        protected override void OnSleep()
         {
         }
 
-        protected override void OnResume ()
+        protected override void OnResume()
         {
         }
     }

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="Users" ContentTemplate="{DataTemplate local:UsersPage}" />
     </TabBar>
 
     <!--

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
@@ -11,10 +8,12 @@ public partial class AppShell : Xamarin.Forms.Shell
         public AppShell()
         {
             InitializeComponent();
+
             Routing.RegisterRoute(nameof(ItemDetailPage), typeof(ItemDetailPage));
             Routing.RegisterRoute(nameof(NewItemPage), typeof(NewItemPage));
+            Routing.RegisterRoute(nameof(UserDetailPage), typeof(UserDetailPage));
+            Routing.RegisterRoute(nameof(NewUserPage), typeof(NewUserPage));
         }
-
     }
 }
 

UndoAssessment/UndoAssessment/Converters/InverseBoolConverter.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Globalization;
+using Xamarin.Forms;
+
+namespace UndoAssessment.Converters
+{
+    //ToDo: the converter can be replace from the Xamarin Community Toolkit package
+    public class InverseBoolConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return !(bool)value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

UndoAssessment/UndoAssessment/Models/IEntity.cs

@@ -0,0 +1,7 @@
+namespace UndoAssessment.Models
+{
+    public interface IEntity
+    {
+        string Id { get; set; }
+    }
+}

UndoAssessment/UndoAssessment/Models/Item.cs

@@ -1,8 +1,6 @@
-using System;
-
-namespace UndoAssessment.Models
+namespace UndoAssessment.Models
 {
-    public class Item
+    public class Item : IEntity
     {
         public string Id { get; set; }
         public string Text { get; set; }

UndoAssessment/UndoAssessment/Models/User.cs

@@ -0,0 +1,9 @@
+namespace UndoAssessment.Models
+{
+    public class User : IEntity
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+        public uint Age { get; set; }
+    }
+}

UndoAssessment/UndoAssessment/Services/ApiResponse.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace UndoAssessment.Services
+{
+    public class ApiResponse
+    {
+        public bool IsSuccess { get; set; }
+        public string ErrorMessage { get; set; }
+        public ApiResponseModel Result { get; set; }
+    }
+
+    public class ApiResponseModel
+    {
+        public string Message { get; set; }
+        public DateTime Date { get; set; }
+
+        public override string ToString()
+        {
+            return $"Message: {Message}, date: {Date}";
+        }
+    }
+}

UndoAssessment/UndoAssessment/Services/DataProvider/DataProvider.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using UndoAssessment.Models;
+
+namespace UndoAssessment.Services.DataProvider
+{
+    internal class DataProvider : IDataProvider
+    {
+        private const string Url = "https://malkarakundostagingpublicapi.azurewebsites.net/";
+        private const string SuccessPartUrl = "success";
+        private const string FailPartUrl = "fail";
+
+        public async Task<IEnumerable<Item>> GetItems()
+        {
+            var items = Enumerable.Range(0, 11)
+                            .Select(ind =>
+                                new Item
+                                {
+                                    Id = ind.ToString(),
+                                    Text = ind.ToString(),
+                                    Description = ind.ToString()
+                                });
+
+            return await Task.FromResult(items);
+        }
+
+        public async Task<ApiResponse> MakeApiRequest(bool flag)
+        {
+            try
+            {
+                using (HttpClient client = new HttpClient())
+                {
+                    var urlformat = $"{Url}{(flag ? SuccessPartUrl : FailPartUrl)}";
+                    var response = await client.GetAsync(urlformat);
+
+                    if (response.IsSuccessStatusCode)
+                    {
+                        var responseBody = await response.Content.ReadAsStringAsync();
+                        var result = ParseResponse(responseBody);
+
+                        return new ApiResponse
+                        {
+                            IsSuccess = true,
+                            Result = result
+                        };
+                    }
+                    else
+                    {
+                        // Read the error message from the response
+                        var errorMessage = await response.Content.ReadAsStringAsync();
+
+                        // Return an error result with the error message
+                        return new ApiResponse
+                        {
+                            IsSuccess = false,
+                            ErrorMessage = errorMessage
+                        };
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse
+                {
+                    IsSuccess = false,
+                    ErrorMessage = ex.Message
+                };
+            }
+        }
+
+        private static ApiResponseModel ParseResponse(string responseBody)
+        {
+            // ToDo: it can be replace to JsonConvert, it for needs install a package
+            // {\"message\":\"Success message\",\"date\":\"11.07.2023 12:50:30\"}
+            // var data = JsonConvert.DeserializeObject<ApiResponseModel>(responseBody);
+            // return new ApiResponseModel()
+            // {
+            //     Message = date.Message,
+            //     Date = date.Date
+            // };
+
+            // Fictitious response
+            return new ApiResponseModel()
+            {
+                Message = "Success message",
+                Date = DateTime.UtcNow
+            };
+        }
+    }
+}

UndoAssessment/UndoAssessment/Services/DataProvider/IDataProvider.cs

@@ -0,0 +1,13 @@
+using UndoAssessment.Models;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace UndoAssessment.Services.DataProvider
+{
+    public interface IDataProvider
+    {
+        Task<IEnumerable<Item>> GetItems();
+
+        Task<ApiResponse> MakeApiRequest(bool flag);
+    }
+}