main project split, authpassword endpoint created

TimetableDesigner.Backend.Services.Authentication.Core/Commands/AuthPassword/AuthPasswordHandler.cs

@@ -0,0 +1,36 @@
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using TimetableDesigner.Backend.Services.Authentication.Core.Helpers;
+using TimetableDesigner.Backend.Services.Authentication.Database;
+using TimetableDesigner.Backend.Services.Authentication.Database.Model;
+
+namespace TimetableDesigner.Backend.Services.Authentication.Core.Commands.AuthPassword;
+
+public class AuthPasswordHandler : IRequestHandler<AuthPasswordCommand, AuthPasswordResult>
+{
+    private readonly DatabaseContext _databaseContext;
+    private readonly IPasswordHasher _passwordHasher;
+
+    public AuthPasswordHandler(DatabaseContext databaseContext, IPasswordHasher passwordHasher)
+    {
+        _databaseContext = databaseContext;
+        _passwordHasher = passwordHasher;
+    }
+    
+    public async Task<AuthPasswordResult> Handle(AuthPasswordCommand request, CancellationToken cancellationToken)
+    {
+        Account? account = await _databaseContext.Accounts.FirstOrDefaultAsync(x => x.Email == request.Email, cancellationToken);
+        if (account is null)
+        {
+            return AuthPasswordResult.Failure();
+        }
+
+        PasswordHashData hash = new PasswordHashData(account.Password, account.PasswordSalt);
+        if (!_passwordHasher.ValidatePassword(hash, request.Password))
+        {
+            return AuthPasswordResult.Failure();
+        }
+
+        return null;
+    }
+}