105 lines
3.5 KiB
C#
105 lines
3.5 KiB
C#
using SharpChat.Commands;
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using SharpChat.Config;
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using SharpChat.Events;
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using SharpChat.Packet;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace SharpChat.PacketHandlers {
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public class SendMessageHandler : IChatPacketHandler {
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private readonly CachedValue<int> MaxMessageLength;
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private List<IChatCommand> Commands { get; } = new();
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public SendMessageHandler(CachedValue<int> maxMsgLength) {
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MaxMessageLength = maxMsgLength ?? throw new ArgumentNullException(nameof(maxMsgLength));
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}
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public void AddCommand(IChatCommand command) {
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Commands.Add(command ?? throw new ArgumentNullException(nameof(command)));
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}
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public void AddCommands(IEnumerable<IChatCommand> commands) {
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Commands.AddRange(commands ?? throw new ArgumentNullException(nameof(commands)));
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}
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public bool IsMatch(ChatPacketHandlerContext ctx) {
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return ctx.CheckPacketId("2");
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}
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public void Handle(ChatPacketHandlerContext ctx) {
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string[] args = ctx.SplitText(3);
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ChatUser user = ctx.Connection.User;
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// No longer concats everything after index 1 with \t, no previous implementation did that either
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string messageText = args.ElementAtOrDefault(2);
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if(user == null || !user.Can(ChatUserPermissions.SendMessage) || string.IsNullOrWhiteSpace(messageText))
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return;
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// Extra validation step, not necessary at all but enforces proper formatting in SCv1.
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if(!long.TryParse(args[1], out long mUserId) || user.UserId != mUserId)
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return;
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ChatChannel channel = user.CurrentChannel;
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if(channel == null
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|| !user.InChannel(channel)
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|| (user.IsSilenced && !user.Can(ChatUserPermissions.SilenceUser)))
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return;
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if(user.Status != ChatUserStatus.Online) {
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user.Status = ChatUserStatus.Online;
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channel.Send(new UserUpdatePacket(user));
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}
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int maxMsgLength = MaxMessageLength;
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if(messageText.Length > maxMsgLength)
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messageText = messageText[..maxMsgLength];
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messageText = messageText.Trim();
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#if DEBUG
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Logger.Write($"<{ctx.Connection.Id} {user.Username}> {messageText}");
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#endif
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IChatMessage message = null;
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if(messageText.StartsWith("/")) {
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ChatCommandContext context = new(messageText, ctx.Chat, user, ctx.Connection, channel);
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IChatCommand command = null;
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foreach(IChatCommand cmd in Commands)
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if(cmd.IsMatch(context)) {
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command = cmd;
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break;
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}
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if(command != null) {
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if(command is ActionCommand actionCommand)
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message = actionCommand.ActionDispatch(context);
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else {
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command.Dispatch(context);
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return;
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}
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}
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}
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message ??= new ChatMessage {
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Target = channel,
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TargetName = channel.TargetName,
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DateTime = DateTimeOffset.UtcNow,
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Sender = user,
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Text = messageText,
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};
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lock(ctx.Chat.EventsAccess) {
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ctx.Chat.Events.AddEvent(message);
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channel.Send(new ChatMessageAddPacket(message));
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}
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}
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}
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}
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