Backend login and register

src/Application/Validators/RegisterRequestValidator.cs

@@ -0,0 +1,29 @@
+using Application.Models;
+using FluentValidation;
+
+namespace Application.Validators;
+
+public class RegisterRequestValidator : AbstractValidator<RegisterRequest>
+{
+    public RegisterRequestValidator()
+    {
+        RuleFor(x => x.Email)
+            .NotEmpty().WithMessage("{PropertyName} is required.")
+            .EmailAddress().WithMessage("{PropertyName} is not valid.");
+
+        RuleFor(x => x.Password)
+            .NotEmpty().WithMessage("{PropertyName} is required.")
+            .MinimumLength(10).WithMessage("{PropertyName} must be at least 10 characters long.")
+            .Matches("[A-Z]").WithMessage("{PropertyName} must contain at least one uppercase letter.")
+            .Matches("[a-z]").WithMessage("{PropertyName} must contain at least one lowercase letter.")
+            .Matches("[0-9]").WithMessage("{PropertyName} must contain at least one digit.")
+            .Matches("[^a-zA-Z0-9]").WithMessage("{PropertyName} must contain at least one special character.");
+
+        RuleFor(x => x.Username)
+            .NotEmpty().WithMessage("{PropertyName} is required.")
+            .MinimumLength(3).WithMessage("{PropertyName} must be at least 3 characters long.")
+            .MaximumLength(20).WithMessage("{PropertyName} must not exceed 20 characters.")
+            .Matches("^[a-zA-Z0-9_]*$")
+            .WithMessage("{PropertyName} can only contain letters, numbers, and underscores.");
+    }
+}