sharp-chat/SharpChat/Packet/UserUpdatePacket.cs

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C#
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using System;
using System.Collections.Generic;
using System.Text;
namespace SharpChat.Packet {
public class UserUpdatePacket : ServerPacket {
public ChatUser User { get; private set; }
public string PreviousName { get; private set; }
public UserUpdatePacket(ChatUser user, string previousName = null) {
User = user ?? throw new ArgumentNullException(nameof(user));
PreviousName = previousName;
}
public override IEnumerable<string> Pack() {
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StringBuilder sb = new();
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bool isSilent = string.IsNullOrEmpty(PreviousName);
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if(!isSilent) {
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sb.Append('2');
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sb.Append('\t');
sb.Append(DateTimeOffset.Now.ToUnixTimeSeconds());
sb.Append("\t-1\t0\fnick\f");
sb.Append(PreviousName);
sb.Append('\f');
sb.Append(User.DisplayName);
sb.Append('\t');
sb.Append(SequenceId);
sb.Append("\t10010");
yield return sb.ToString();
sb.Clear();
}
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sb.Append("10");
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sb.Append('\t');
sb.Append(User.Pack());
yield return sb.ToString();
}
}
}