Create models and Clean Arch boilerplate

CSR.Domain/Entities/Role.cs

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+namespace CSR.Domain.Entities;
+
+public record Role
+{
+  public int Id { get; private set; }
+  public string Name { get; private set; }
+
+  private Role(int id, string name)
+  {
+    Id = id;
+    Name = name;
+  }
+
+  internal static Role LoadExisting(int id, string name)
+  {
+    return new Role(id, name);
+  }
+
+  public static Role Admin
+  {
+    get
+    {
+      return new Role(1, "Admin");
+    }
+  }
+  public static Role User
+  {
+    get
+    {
+      return new Role(2, "User");
+    }
+  }
+}

CSR.Domain/Entities/User.cs

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+namespace CSR.Domain.Entities;
+
+using System.Net.Mail;
+using CSR.Domain.Interfaces;
+
+public class User
+{
+  public int Id { get; private set; }
+  public string Username { get; private set; }
+  public string Email { get; private set; }
+  public string PasswordHash { get; private set; }
+
+  public int RoleId { get; private set; }
+  public Role Role { get; private set; }
+
+  private User(int id, string username, string email, string passwordHash, int roleId, Role role)
+  {
+    Id = id;
+    Username = username;
+    Email = email;
+    PasswordHash = passwordHash;
+    RoleId = roleId;
+    Role = role;
+  }
+
+  // This role is used when a new user is created
+  public static readonly Role DefaultRole = Role.User;
+
+
+  internal static User LoadExisting(int id, string username, string email, string passwordHash, int roleId, Role role)
+  {
+    return new User(id, username, email, passwordHash, roleId, role);
+  }
+
+
+  public (bool Success, IEnumerable<string>? Errors) UpdatePassword(string password, IPasswordHasher passwordHasher, User requestingUser)
+  {
+    if (requestingUser.Id != Id || requestingUser.Role.Name != "Admin")
+    {
+      throw new UnauthorizedAccessException("Only admins or the same user can update passwords.");
+    }
+
+    var validityCheck = IsValidPassword(password);
+
+    if (validityCheck.IsValid)
+    {
+      PasswordHash = passwordHasher.HashPassword(password);
+    }
+
+    return validityCheck;
+  }
+
+
+  public bool VerifyPasswordAgainstHash(string providedPassword, IPasswordHasher passwordHasher, User requestingUser)
+  {
+    if (requestingUser.Id != Id || requestingUser.Role.Name != "Admin")
+    {
+      throw new UnauthorizedAccessException("Only admins or the same user can verify passwords.");
+    }
+
+    return passwordHasher.VerifyHashedPassword(PasswordHash, providedPassword);
+  }
+
+
+  public static (bool IsValid, IEnumerable<string>? Errors) IsValidPassword(string password)
+  {
+    var Errors = new List<string>();
+    if (password.Length < 8 || password.Length > 32)
+    {
+      Errors.Add("Password must be between 8 and 32 characters long.");
+    }
+    if (!password.Any(char.IsUpper))
+    {
+      Errors.Add("Password must contain at least one uppercase letter.");
+    }
+    if (!password.Any(char.IsLower))
+    {
+      Errors.Add("Password must contain at least one lowercase letter.");
+    }
+    if (!password.Any(char.IsDigit))
+    {
+      Errors.Add("Password must contain at least one digit.");
+    }
+    if (Errors.Count > 0)
+    {
+      return (false, Errors);
+    }
+    return (true, null);
+  }
+
+
+  public (bool Success, IEnumerable<string>? Errors) UpdateEmail(string email, User requestingUser)
+  {
+    if (requestingUser.Id != Id || requestingUser.Role.Name != "Admin")
+    {
+      throw new UnauthorizedAccessException("Only admins or the same user can update email.");
+    }
+
+    if (IsValidEmail(email))
+    {
+      Email = email;
+      return (true, null);
+    }
+    return (false, new List<string> { "Invalid email format." });
+  }
+
+
+  public static bool IsValidEmail(string email)
+  {
+    try
+    {
+      var mailAddress = new MailAddress(email);
+      return true;
+    }
+    catch (FormatException)
+    {
+      return false;
+    }
+  }
+
+
+  public (bool Success, IEnumerable<string>? Errors) UpdateUsername(string username, User requestingUser)
+  {
+    if (requestingUser.Id != Id || requestingUser.Role.Name != "Admin")
+    {
+      throw new UnauthorizedAccessException("Only admins can update username.");
+    }
+
+    var validityCheck = IsValidUsername(username);
+    if (validityCheck.IsValid)
+    {
+      Username = username;
+    }
+
+    return validityCheck;
+  }
+
+
+  public static (bool IsValid, IEnumerable<string>? Errors) IsValidUsername(string username)
+  {
+    var Errors = new List<string>();
+    if (!username.All(char.IsLetterOrDigit))
+    {
+      Errors.Add("Username must be alphanumeric.");
+    }
+    if (string.IsNullOrWhiteSpace(username) || username.Length < 3)
+    {
+      Errors.Add("Username must be at least 3 characters long.");
+    }
+    if (username.Length > 32)
+    {
+      Errors.Add("Username must be less than 32 characters long.");
+    }
+
+    if (Errors.Count > 0)
+    {
+      return (false, Errors);
+    }
+
+    return (true, null);
+  }
+
+
+  public void UpdateRole(Role role, User requestingUser)
+  {
+    if (requestingUser.Role.Name != "Admin")
+    {
+      throw new UnauthorizedAccessException("Only admins can assign roles.");
+    }
+    Role = role;
+    RoleId = role.Id;
+  }
+}