app/APP/Utility/StringAssemble.cs

using System.Text;
using APP.DTO;

namespace APP.Utility;

public static class StringAssemble
{
    public static string UserInfo(User? user)
    {
        if (user == null)
        {
            return string.Empty;
        }

        var sb = new StringBuilder();
        sb.Append("MAL ID:");
        sb.AppendLine();

        sb.Append("Last online:");
        sb.AppendLine();

        if (!string.IsNullOrEmpty(user.Location))
        {
            sb.Append("Location:");
            sb.AppendLine();
        }

        sb.Append("Joined:");
        sb.AppendLine();

        return sb.ToString();
    }

    public static string UserData(User? user)
    {
        if (user == null)
        {
            return string.Empty;
        }

        var sb = new StringBuilder();
        sb.Append(user.Id);
        sb.AppendLine();

        sb.Append(user.LastOnline);
        sb.AppendLine();

        if (!string.IsNullOrEmpty(user.Location))
        {
            sb.Append(user.Location);
            sb.AppendLine();
        }

        sb.Append(user.Joined.ToShortDateString());
        sb.AppendLine();

        return sb.ToString();
    }
}