implemented database functionality

WebAppCW.sln

@@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.9.34723.18
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WebAppCW", "WebAppCW\WebAppCW.csproj", "{EA2E2843-3C6A-4142-A68F-414A1E55EA07}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WebAppCW", "WebAppCW\WebAppCW.csproj", "{EA2E2843-3C6A-4142-A68F-414A1E55EA07}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

WebAppCW/AccountPage.xaml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="WebAppCW.AccountPage"
+             Title="AccountPage">
+    <VerticalStackLayout>
+        <Label 
+            Text="Account Details"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+    </VerticalStackLayout>
+</ContentPage>

WebAppCW/AccountPage.xaml.cs

@@ -0,0 +1,9 @@
+namespace WebAppCW;
+
+public partial class AccountPage : ContentPage
+{
+	public AccountPage()
+	{
+		InitializeComponent();
+	}
+}

WebAppCW/App.xaml.cs

@@ -2,11 +2,14 @@
 {
     public partial class App : Application
     {
-        public App()
+        public static UserDB Userdb { get; private set; }
+        public App(UserDB db)
         {
             InitializeComponent();
 
             MainPage = new AppShell();
+
+            Userdb = db;
         }
     }
 }

WebAppCW/CreateAccountPage.xaml.cs

@@ -1,3 +1,6 @@
+
+//using Windows.System;
+
 namespace WebAppCW;
 
 public partial class CreateAccountPage : ContentPage
@@ -21,13 +24,13 @@ private void OnCreateAccountButtonClicked(object sender, EventArgs e)
 			return;
         }
 
-		bool isUsernameAvailable = checkUsernameAvailability(username);
+		//bool isUsernameAvailable = checkUsernameAvailability(username);
 
-		if (!isUsernameAvailable)
-		{
-			CreateAccountStatusLabel.Text = "Username is already taken. Please choose another";
-			return;
-        }
+		//if (!isUsernameAvailable)
+		//{
+		//	CreateAccountStatusLabel.Text = "Username is already taken. Please choose another";
+		//	return;
+        //}
 
 		bool isPasswordSame = checkPasswordValidity(password1, password2);
 
@@ -53,20 +56,25 @@ private void OnCreateAccountButtonClicked(object sender, EventArgs e)
 
 	private bool checkUsernameAvailability(string username)
 	{
-		return true;
-	}
+        return App.Userdb.IsUsernameAvailable(username);
+    }
 
 	private bool checkPasswordValidity(string password1, string password2)
 	{
-		if (password1 == password2)
-		{  
-			return true;
-		}
-		return false;
+		return password1 == password2;
 	}
 
 	private bool createAccount(string username, string password, string email)
 	{
-		return true;
+		try
+		{
+			App.Userdb.AddNewUser(username, password, email);
+			return true;
+		}
+		catch (Exception ex)
+		{
+			CreateAccountStatusLabel.Text = $"Failed to create account: {ex.Message}";
+			return false;
+		}
 	}
 }

WebAppCW/DB/User.cs

@@ -0,0 +1,22 @@
+using SQLite;
+
+namespace WebAppCW
+{
+    [Table("User")]
+    public class User
+    {
+        [PrimaryKey]
+        [AutoIncrement]
+        [Column("id")]
+        public int Id { get; set; }
+
+        [Column("username")]
+        public string? Username { get; set; }
+
+        [Column("password")]
+        public string? Password { get; set; }
+
+        [Column("email")]
+        public string? Email { get; set; }
+    }
+}

WebAppCW/DB/UserDB.cs

@@ -0,0 +1,114 @@
+using Microsoft.Maui.Storage;
+using SQLite;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+namespace WebAppCW
+{
+    public class UserDB
+    {
+        string _dbPath;
+
+        public string? StatusMessage { get; set; }
+
+        private SQLiteConnection conn;
+
+        private void Init()
+        {
+            if (conn != null)
+                return;
+
+            conn = new SQLiteConnection(_dbPath);
+            conn.CreateTable<User>();
+        }
+
+        public UserDB(string dbPath)
+        {
+            _dbPath = dbPath;
+            conn = new SQLiteConnection(_dbPath);
+        }
+
+        public void AddNewUser(string username, string password, string email)
+        {
+            int result = 0;
+            try
+            {
+                Init();
+
+                result = conn.Insert(new User { Username = username, Password = password, Email = email});
+                result = 0;
+
+                StatusMessage = string.Format("{0} record(s) added (Name: {1})", result, username);
+            }
+            catch (Exception ex)
+            {
+                StatusMessage = string.Format("Failed to add {0}. Error: {1}", username, ex.Message);
+            }
+
+        }
+
+        public List<User> GetAllUsers()
+        {
+            try
+            {
+                Init();
+                return conn.Table<User>().ToList();
+            }
+            catch (Exception ex)
+            {
+                StatusMessage = string.Format("Failed to retrieve data. {0}", ex.Message);
+            }
+
+            return new List<User>();
+        }
+
+        public User GetByUsername(string username)
+        {
+            try
+            {
+                Init();
+                var user = from u in conn.Table<User>()
+                           where u.Username == username
+                           select u;
+                return user.FirstOrDefault();
+            }
+            catch (Exception ex)
+            {
+                StatusMessage = string.Format("Failed to retrieve data. {0}", ex.Message);
+            }
+            return null;
+        }
+
+        public int UpdateUser(User user)
+        {
+            int result = 0;
+            result = conn.Update(user);
+            return result;
+        }
+
+        public int DeleteUser(int userID)
+        {
+            int result = 0;
+            result = conn.Delete<User>(userID);
+            return result;
+        }
+        public bool IsUsernameAvailable(string username)
+        {
+            try
+            {
+                Init();
+                var existingUser = conn.Table<User>().FirstOrDefault(u => u.Username == username);
+                return existingUser == null;
+            }
+            catch (Exception ex)
+            {
+                StatusMessage = $"Failed to check username availability. Error: {ex.Message}";
+                return false;
+            }
+        }
+    }
+}

WebAppCW/FileAccessHelper.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WebAppCW
+{
+    public class FileAccessHelper
+    {
+        public static string GetLocalFilePath(string filename)
+        {
+            return System.IO.Path.Combine(FileSystem.AppDataDirectory, filename);
+        }
+    }
+}

WebAppCW/LoginPage.xaml.cs

@@ -27,17 +27,19 @@ private void OnLoginButtonClicked(object sender, EventArgs e)
 	}
 
 	private bool AuthenticateUser(string username, string password)
-	{
-		if (username == "user" && password == "pass")
-		{
-			return true;
-		}
-		else
-		{
-			return false;
-		}
-	}
-	private void OnCreateAccountButtonClicked(object sender, EventArgs e)
+    {
+        var user = App.Userdb.GetByUsername(username);
+
+        if (user != null && user.Password == password)
+        {
+            return true;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    private void OnCreateAccountButtonClicked(object sender, EventArgs e)
 	{
         Navigation.PushAsync(new CreateAccountPage());
     }

WebAppCW/MainPage.xaml

@@ -8,6 +8,18 @@
         <VerticalStackLayout
             Padding="30,0"
             Spacing="25">
+            <HorizontalStackLayout
+                HorizontalOptions="FillAndExpand"
+                Spacing="10">
+                <Button
+                    Text="Account Details"
+                    Clicked="OnAccountDetailsClicked"
+                    HorizontalOptions="FillAndExpand" />
+                <Button
+                    Text="Logout"
+                    Clicked="OnLogoutClicked"
+                    HorizontalOptions="FillAndExpand" />
+            </HorizontalStackLayout>
             <Image
                 Source="raven_tor_img"
                 HeightRequest="185"

WebAppCW/MainPage.xaml.cs

@@ -2,13 +2,22 @@
 {
     public partial class MainPage : ContentPage
     {
-        int count = 0;
 
         public MainPage()
         {
             InitializeComponent();
         }
 
+        private void OnAccountDetailsClicked(object sender, EventArgs e)
+        {
+            Navigation.PushAsync(new AccountPage());
+        }
+
+        private void OnLogoutClicked(object sender, EventArgs e)
+        {
+            Navigation.PushAsync(new LoginPage());
+        }
+
         private void OnRavenClicked(object sender, EventArgs e)
         {
             Navigation.PushAsync(new RavenTorPage());

WebAppCW/MauiProgram.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Logging;
 
+
 namespace WebAppCW
 {
     public static class MauiProgram
@@ -14,9 +15,11 @@ public static MauiApp CreateMauiApp()
                     fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                     fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
                 });
+            string dbPath = FileAccessHelper.GetLocalFilePath("User.db3");
+            builder.Services.AddSingleton<UserDB>(s => ActivatorUtilities.CreateInstance<UserDB>(s, dbPath));
 
 #if DEBUG
-    		builder.Logging.AddDebug();
+            builder.Logging.AddDebug();
 #endif
 
             return builder.Build();