users/src/Nocr.Users.AppServices/Users/User.cs

namespace Nocr.Users.AppServices.Users;

public sealed class User
{
    public long Id { get; set; }

    public string Username { get; private set; } = default!;
    
    public bool BotBlocked { get; private set; }

    private readonly List<UserIdentity> _identities = new();

    public IReadOnlyCollection<UserIdentity> Identities => _identities;

    /// <summary>
    /// Used by ef.
    /// </summary>
    private User()
    {
    }
    
    private User(string username, params UserIdentity[] identities)
    {
        Username = username;

        // TODO: Check that there is no repeating identity types
        if (identities.GroupBy(x => x.Type).SelectMany(g => g.Skip(1)).Any())
        {
            throw new InvalidOperationException($"All identities should be unique by {nameof(UserIdentity.Type)}");
        }

        _identities.AddRange(identities);
    }

    public static User Initialize(string username, params UserIdentity[] identities)
    {
        if (string.IsNullOrWhiteSpace(username))
        {
            throw new ArgumentNullException(nameof(username));
        }

        if (username.Length is < 5 or > 32)
        {
            throw new ArgumentException("Username length should be between 5 and 32 symbols", username);
        }

        return new User(username, identities);
    }

    public void MarkAsBlocked()
    {
        BotBlocked = true;
    }

    public void MarkAsUnblocked()
    {
        BotBlocked = false;
    }
}