migrare UI in WebAssembly + integrare Serviciu stocare info pe web + WebToken

backend/Application/Endpoints/Authorization/Doctor/DoctorLoginHandler.cs

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+using Application.Services.Database.PostgreSQL;
+using Application.Services.HashingAlgorithms;
+
+namespace Application.Endpoints.Authorization.Doctor;
+
+public class DoctorLoginHandler
+{
+    private readonly IDoctorRepository _database;
+    private readonly IHashingAlgorithms _hashingAlgorithms;
+
+    public DoctorLoginHandler(IDoctorRepository database, IHashingAlgorithms hashingAlgorithms)
+    {
+        _database = database;
+        _hashingAlgorithms = hashingAlgorithms;
+    }
+
+    public async Task<BaseResponse> Handle(LoginDto loginDTO)
+    {
+        loginDTO.Password = _hashingAlgorithms.SHA256Algorithm(loginDTO.Password);
+
+        var validation = new DoctorLoginValidation(_database);
+        var validationResult = await validation.ValidateAsync(loginDTO);
+
+        if (validationResult.IsValid)
+        {
+            var doctor = await _database.FindByEmailAsync(loginDTO.Email);
+            return new BaseResponse
+            {
+                StatusCode = HttpStatusCodes.OK,
+                Message = "Authentication successful",
+                Data = doctor
+            };
+        }
+
+        var firstError = validationResult.Errors.FirstOrDefault();
+        var errorCode = int.TryParse(firstError.ErrorCode, out var code) ? code : -1;
+        var errorMessage = firstError.ErrorMessage;
+        return new BaseResponse
+        {
+            StatusCode = errorCode,
+            Message = errorMessage,
+            Data = null
+        };
+    }
+}

backend/Application/Endpoints/Authorization/Doctor/DoctorLoginValidation.cs

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+using Application.Services.Database.PostgreSQL;
+using FluentValidation;
+
+namespace Application.Endpoints.Authorization.Doctor;
+
+public class DoctorLoginValidation : AbstractValidator<LoginDto>
+{
+    private readonly IDoctorRepository _doctorRepository;
+
+    public DoctorLoginValidation(IDoctorRepository doctorRepository)
+    {
+        _doctorRepository = doctorRepository;
+
+        RuleFor(x => x.Email)
+            .NotEmpty().WithMessage("Email is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
+            .EmailAddress().WithMessage("Invalid email format.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+
+        RuleFor(x => x.Password)
+            .NotEmpty().WithMessage("Password is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
+            .MinimumLength(8).WithMessage("Password must be at least 8 characters long.")
+            .WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+
+        RuleFor(x => x)
+            .MustAsync(CredentialsMatch).WithMessage("Invalid credentials")
+            .WithErrorCode(HttpStatusCodes.Unauthorized.ToString());
+    }
+
+    private async Task<bool> CredentialsMatch(LoginDto dto, CancellationToken cancellationToken)
+    {
+        var code = await _doctorRepository.CredentialsMatch(dto.Email, dto.Password);
+        return code;
+    }
+}

backend/Application/Endpoints/Authorization/Doctor/DoctorResetPasswordHandler.cs

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+using Application.Services.Database.PostgreSQL;
+using Application.Services.HashingAlgorithms;
+
+namespace Application.Endpoints.Authorization.Doctor;
+
+public class DoctorResetPasswordHandler
+{
+    private readonly IDoctorRepository _doctorRepository;
+    private readonly IHashingAlgorithms _hashingAlgorithms;
+
+    public DoctorResetPasswordHandler(IDoctorRepository doctorRepository, IHashingAlgorithms hashingAlgorithms)
+    {
+        _doctorRepository = doctorRepository;
+        _hashingAlgorithms = hashingAlgorithms;
+    }
+
+    public async Task<BaseResponse> Handle(LoginDto resetDoctorDto)
+    {
+        var validation = new DoctorResetPasswordValidation(_doctorRepository, _hashingAlgorithms);
+        var validationResult = await validation.ValidateAsync(resetDoctorDto);
+
+        if (!validationResult.IsValid)
+        {
+            var firstError = validationResult.Errors.FirstOrDefault();
+            var errorCode = int.TryParse(firstError.ErrorCode, out var code) ? code : -1;
+            var errorMessage = firstError.ErrorMessage;
+
+            return new BaseResponse
+            {
+                StatusCode = errorCode,
+                Message = errorMessage,
+                Data = null
+            };
+        }
+
+        var currentDoctor = await _doctorRepository.FindByEmailAsync(resetDoctorDto.Email);
+        var updatedDoctor = currentDoctor;
+        updatedDoctor.SetPassword(_hashingAlgorithms.SHA256Algorithm(resetDoctorDto.Password));
+
+        await _doctorRepository.UpdateAsync(updatedDoctor);
+
+        return new BaseResponse
+        {
+            StatusCode = HttpStatusCodes.OK,
+            Message = "Password successfully changed!",
+            Data = null
+        };
+    }
+}

backend/Application/Endpoints/Authorization/Doctor/DoctorResetPasswordValidation.cs

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+using System.Net;
+using Application.Services.Database.PostgreSQL;
+using Application.Services.HashingAlgorithms;
+using FluentValidation;
+
+namespace Application.Endpoints.Authorization.Doctor;
+
+public class DoctorResetPasswordValidation : AbstractValidator<LoginDto>
+{
+    private readonly IDoctorRepository _doctorRepository;
+    private readonly IHashingAlgorithms _hashingAlgorithms;
+
+    public DoctorResetPasswordValidation(IDoctorRepository doctorRepository, IHashingAlgorithms hashingAlgorithms)
+    {
+        _doctorRepository = doctorRepository;
+        _hashingAlgorithms = hashingAlgorithms;
+
+        RuleFor(x => x.Email)
+            .NotEmpty().WithMessage("Email is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
+            .EmailAddress().WithMessage("Invalid email format.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
+            .MustAsync(BeExistingDoctor).WithMessage("Patient with this email does not exist.")
+            .WithErrorCode(HttpStatusCodes.NotFound.ToString());
+
+        RuleFor(x => x.Password)
+            .NotEmpty().WithMessage("Password is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
+            .WithErrorCode(HttpStatusCode.BadRequest.ToString());
+
+        RuleFor(x => x)
+            .MustAsync(BeDifferentFromOldPassword).WithMessage("Password can't be as the previous.")
+            .WithErrorCode(HttpStatusCode.BadRequest.ToString()).WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+    }
+
+    private async Task<bool> BeExistingDoctor(string email, CancellationToken cancellationToken)
+    {
+        var doctor = await _doctorRepository.FindByEmailAsync(email);
+        return doctor != null;
+    }
+
+    private async Task<bool> BeDifferentFromOldPassword(LoginDto dto, CancellationToken cancellationToken)
+    {
+        var currentPatient = await _doctorRepository.FindByEmailAsync(dto.Email);
+        return !_hashingAlgorithms.SHA256Algorithm(dto.Password)
+            .Equals(currentPatient?.Password, StringComparison.Ordinal);
+    }
+}