451 lines
19 KiB
C#
451 lines
19 KiB
C#
using Discord.WebSocket;
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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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using System.Threading.Tasks;
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using Discord;
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using NLog;
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using Discord.Commands;
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using NadekoBot.Extensions;
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using System.Collections.Concurrent;
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using System.Threading;
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using System.Collections.Immutable;
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using System.IO;
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using Discord.Net;
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using NadekoBot.Common;
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using NadekoBot.Common.Collections;
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using NadekoBot.Common.ModuleBehaviors;
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namespace NadekoBot.Core.Services
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{
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public class GuildUserComparer : IEqualityComparer<IGuildUser>
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{
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public bool Equals(IGuildUser x, IGuildUser y) => x.Id == y.Id;
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public int GetHashCode(IGuildUser obj) => obj.Id.GetHashCode();
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}
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public class CommandHandler : INService
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{
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public const int GlobalCommandsCooldown = 750;
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private readonly DiscordSocketClient _client;
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private readonly CommandService _commandService;
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private readonly Logger _log;
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private readonly IBotCredentials _creds;
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private readonly NadekoBot _bot;
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private INServiceProvider _services;
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private IEnumerable<IEarlyBlocker> _earlyBlockers;
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private IEarlyBlockingExecutor[] _earlyBlockingExecutors;
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private IInputTransformer[] _inputTransformers;
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private ILateBlocker[] _lateBlockers;
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private ILateExecutor[] _lateExecutors;
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public string DefaultPrefix { get; private set; }
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private ConcurrentDictionary<ulong, string> _prefixes { get; } = new ConcurrentDictionary<ulong, string>();
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private ImmutableArray<AsyncLazy<IDMChannel>> OwnerChannels { get; set; } = new ImmutableArray<AsyncLazy<IDMChannel>>();
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public event Func<IUserMessage, CommandInfo, Task> CommandExecuted = delegate { return Task.CompletedTask; };
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public event Func<CommandInfo, ITextChannel, string, Task> CommandErrored = delegate { return Task.CompletedTask; };
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public event Func<IUserMessage, Task> OnMessageNoTrigger = delegate { return Task.CompletedTask; };
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//userid/msg count
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public ConcurrentDictionary<ulong, uint> UserMessagesSent { get; } = new ConcurrentDictionary<ulong, uint>();
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public ConcurrentHashSet<ulong> UsersOnShortCooldown { get; } = new ConcurrentHashSet<ulong>();
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private readonly Timer _clearUsersOnShortCooldown;
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public CommandHandler(DiscordSocketClient client, DbService db,
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IBotConfigProvider bc, CommandService commandService,
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IBotCredentials credentials, NadekoBot bot)
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{
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_client = client;
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_commandService = commandService;
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_creds = credentials;
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_bot = bot;
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_db = db;
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_log = LogManager.GetCurrentClassLogger();
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_clearUsersOnShortCooldown = new Timer(_ =>
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{
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UsersOnShortCooldown.Clear();
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}, null, GlobalCommandsCooldown, GlobalCommandsCooldown);
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DefaultPrefix = bc.BotConfig.DefaultPrefix;
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_prefixes = bot.AllGuildConfigs
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.Where(x => x.Prefix != null)
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.ToDictionary(x => x.GuildId, x => x.Prefix)
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.ToConcurrent();
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}
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public string GetPrefix(IGuild guild) => GetPrefix(guild?.Id);
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public string GetPrefix(ulong? id)
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{
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if (id == null || !_prefixes.TryGetValue(id.Value, out var prefix))
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return DefaultPrefix;
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return prefix;
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}
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public string SetDefaultPrefix(string prefix)
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{
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if (string.IsNullOrWhiteSpace(prefix))
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throw new ArgumentNullException(nameof(prefix));
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prefix = prefix.ToLowerInvariant();
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using (var uow = _db.UnitOfWork)
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{
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uow.BotConfig.GetOrCreate(set => set).DefaultPrefix = prefix;
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uow.Complete();
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}
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return DefaultPrefix = prefix;
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}
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public string SetPrefix(IGuild guild, string prefix)
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{
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if (string.IsNullOrWhiteSpace(prefix))
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throw new ArgumentNullException(nameof(prefix));
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if (guild == null)
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throw new ArgumentNullException(nameof(guild));
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prefix = prefix.ToLowerInvariant();
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using (var uow = _db.UnitOfWork)
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{
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var gc = uow.GuildConfigs.For(guild.Id, set => set);
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gc.Prefix = prefix;
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uow.Complete();
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}
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_prefixes.AddOrUpdate(guild.Id, prefix, (key, old) => prefix);
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return prefix;
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}
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public void AddServices(INServiceProvider services)
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{
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_services = services;
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_earlyBlockers = services
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.Select(x => x as IEarlyBlocker)
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.Where(x => x != null)
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.ToArray();
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_earlyBlockingExecutors = services
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.Select(x => x as IEarlyBlockingExecutor)
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.Where(x => x != null)
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.ToArray();
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_inputTransformers = services
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.Select(x => x as IInputTransformer)
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.Where(x => x != null)
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.ToArray();
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_lateBlockers = services
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.Select(x => x as ILateBlocker)
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.Where(x => x != null)
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.ToArray();
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_lateExecutors = services
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.Select(x => x as ILateExecutor)
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.Where(x => x != null)
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.ToArray();
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}
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public async Task ExecuteExternal(ulong? guildId, ulong channelId, string commandText)
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{
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if (guildId != null)
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{
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var guild = _client.GetGuild(guildId.Value);
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var channel = guild?.GetChannel(channelId) as SocketTextChannel;
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if (channel == null)
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{
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_log.Warn("Channel for external execution not found.");
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return;
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}
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try
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{
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IUserMessage msg = await channel.SendMessageAsync(commandText).ConfigureAwait(false);
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msg = (IUserMessage)await channel.GetMessageAsync(msg.Id).ConfigureAwait(false);
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await TryRunCommand(guild, channel, msg).ConfigureAwait(false);
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//msg.DeleteAfter(5);
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}
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catch { }
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}
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}
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public Task StartHandling()
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{
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_client.MessageReceived += (msg) => { var _ = Task.Run(() => MessageReceivedHandler(msg)); return Task.CompletedTask; };
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return Task.CompletedTask;
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}
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private const float _oneThousandth = 1.0f / 1000;
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private readonly DbService _db;
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private Task LogSuccessfulExecution(IUserMessage usrMsg, ITextChannel channel, params int[] execPoints)
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{
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_log.Info($"Command Executed after " + string.Join("/", execPoints.Select(x => x * _oneThousandth)) + "s\n\t" +
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"User: {0}\n\t" +
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"Server: {1}\n\t" +
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"Channel: {2}\n\t" +
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"Message: {3}",
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usrMsg.Author + " [" + usrMsg.Author.Id + "]", // {0}
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(channel == null ? "PRIVATE" : channel.Guild.Name + " [" + channel.Guild.Id + "]"), // {1}
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(channel == null ? "PRIVATE" : channel.Name + " [" + channel.Id + "]"), // {2}
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usrMsg.Content // {3}
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);
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return Task.CompletedTask;
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}
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private void LogErroredExecution(string errorMessage, IUserMessage usrMsg, ITextChannel channel, params int[] execPoints)
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{
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_log.Warn($"Command Errored after " + string.Join("/", execPoints.Select(x => x * _oneThousandth)) + "s\n\t" +
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"User: {0}\n\t" +
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"Server: {1}\n\t" +
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"Channel: {2}\n\t" +
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"Message: {3}\n\t" +
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"Error: {4}",
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usrMsg.Author + " [" + usrMsg.Author.Id + "]", // {0}
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(channel == null ? "PRIVATE" : channel.Guild.Name + " [" + channel.Guild.Id + "]"), // {1}
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(channel == null ? "PRIVATE" : channel.Name + " [" + channel.Id + "]"), // {2}
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usrMsg.Content,// {3}
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errorMessage
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//exec.Result.ErrorReason // {4}
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);
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}
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private async Task MessageReceivedHandler(SocketMessage msg)
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{
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try
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{
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if (msg.Author.IsBot || !_bot.Ready.Task.IsCompleted) //no bots, wait until bot connected and initialized
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return;
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if (!(msg is SocketUserMessage usrMsg))
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return;
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#if !GLOBAL_NADEKO
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// track how many messagges each user is sending
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UserMessagesSent.AddOrUpdate(usrMsg.Author.Id, 1, (key, old) => ++old);
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#endif
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var channel = msg.Channel as ISocketMessageChannel;
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var guild = (msg.Channel as SocketTextChannel)?.Guild;
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await TryRunCommand(guild, channel, usrMsg);
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}
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catch (Exception ex)
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{
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_log.Warn("Error in CommandHandler");
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_log.Warn(ex);
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if (ex.InnerException != null)
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{
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_log.Warn("Inner Exception of the error in CommandHandler");
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_log.Warn(ex.InnerException);
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}
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}
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}
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public async Task TryRunCommand(SocketGuild guild, ISocketMessageChannel channel, IUserMessage usrMsg)
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{
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var execTime = Environment.TickCount;
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//its nice to have early blockers and early blocking executors separate, but
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//i could also have one interface with priorities, and just put early blockers on
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//highest priority. :thinking:
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foreach (var blocker in _earlyBlockers)
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{
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if (await blocker.TryBlockEarly(guild, usrMsg).ConfigureAwait(false))
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{
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_log.Info("Blocked User: [{0}] Message: [{1}] Service: [{2}]", usrMsg.Author, usrMsg.Content, blocker.GetType().Name);
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return;
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}
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}
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var exec2 = Environment.TickCount - execTime;
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foreach (var exec in _earlyBlockingExecutors)
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{
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if (await exec.TryExecuteEarly(_client, guild, usrMsg).ConfigureAwait(false))
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{
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_log.Info("User [{0}] executed [{1}] in [{2}]", usrMsg.Author, usrMsg.Content, exec.GetType().Name);
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return;
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}
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}
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var exec3 = Environment.TickCount - execTime;
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string messageContent = usrMsg.Content;
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foreach (var exec in _inputTransformers)
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{
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string newContent;
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if ((newContent = await exec.TransformInput(guild, usrMsg.Channel, usrMsg.Author, messageContent).ConfigureAwait(false)) != messageContent.ToLowerInvariant())
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{
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messageContent = newContent;
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break;
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}
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}
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var prefix = GetPrefix(guild?.Id);
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var isPrefixCommand = messageContent.StartsWith(".prefix");
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// execute the command and measure the time it took
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if (messageContent.StartsWith(prefix) || isPrefixCommand)
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{
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var result = await ExecuteCommandAsync(new CommandContext(_client, usrMsg), messageContent, isPrefixCommand ? 1 : prefix.Length, _services, MultiMatchHandling.Best);
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execTime = Environment.TickCount - execTime;
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if (result.Success)
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{
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await LogSuccessfulExecution(usrMsg, channel as ITextChannel, exec2, exec3, execTime).ConfigureAwait(false);
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await CommandExecuted(usrMsg, result.Info).ConfigureAwait(false);
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return;
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}
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else if (result.Error != null)
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{
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LogErroredExecution(result.Error, usrMsg, channel as ITextChannel, exec2, exec3, execTime);
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if (guild != null)
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await CommandErrored(result.Info, channel as ITextChannel, result.Error);
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}
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}
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else
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{
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await OnMessageNoTrigger(usrMsg).ConfigureAwait(false);
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}
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foreach (var exec in _lateExecutors)
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{
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await exec.LateExecute(_client, guild, usrMsg).ConfigureAwait(false);
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}
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}
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public Task<(bool Success, string Error, CommandInfo Info)> ExecuteCommandAsync(CommandContext context, string input, int argPos, IServiceProvider serviceProvider, MultiMatchHandling multiMatchHandling = MultiMatchHandling.Exception)
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=> ExecuteCommand(context, input.Substring(argPos), serviceProvider, multiMatchHandling);
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public async Task<(bool Success, string Error, CommandInfo Info)> ExecuteCommand(CommandContext context, string input, IServiceProvider services, MultiMatchHandling multiMatchHandling = MultiMatchHandling.Exception)
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{
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var searchResult = _commandService.Search(context, input);
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if (!searchResult.IsSuccess)
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return (false, null, null);
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var commands = searchResult.Commands;
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var preconditionResults = new Dictionary<CommandMatch, PreconditionResult>();
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foreach (var match in commands)
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{
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preconditionResults[match] = await match.Command.CheckPreconditionsAsync(context, services).ConfigureAwait(false);
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}
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var successfulPreconditions = preconditionResults
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.Where(x => x.Value.IsSuccess)
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.ToArray();
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if (successfulPreconditions.Length == 0)
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{
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//All preconditions failed, return the one from the highest priority command
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var bestCandidate = preconditionResults
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.OrderByDescending(x => x.Key.Command.Priority)
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.FirstOrDefault(x => !x.Value.IsSuccess);
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return (false, bestCandidate.Value.ErrorReason, commands[0].Command);
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}
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var parseResultsDict = new Dictionary<CommandMatch, ParseResult>();
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foreach (var pair in successfulPreconditions)
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{
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var parseResult = await pair.Key.ParseAsync(context, searchResult, pair.Value, services).ConfigureAwait(false);
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if (parseResult.Error == CommandError.MultipleMatches)
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{
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IReadOnlyList<TypeReaderValue> argList, paramList;
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switch (multiMatchHandling)
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{
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case MultiMatchHandling.Best:
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argList = parseResult.ArgValues.Select(x => x.Values.OrderByDescending(y => y.Score).First()).ToImmutableArray();
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paramList = parseResult.ParamValues.Select(x => x.Values.OrderByDescending(y => y.Score).First()).ToImmutableArray();
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parseResult = ParseResult.FromSuccess(argList, paramList);
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break;
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}
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}
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parseResultsDict[pair.Key] = parseResult;
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}
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// Calculates the 'score' of a command given a parse result
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float CalculateScore(CommandMatch match, ParseResult parseResult)
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{
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float argValuesScore = 0, paramValuesScore = 0;
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if (match.Command.Parameters.Count > 0)
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{
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var argValuesSum = parseResult.ArgValues?.Sum(x => x.Values.OrderByDescending(y => y.Score).FirstOrDefault().Score) ?? 0;
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var paramValuesSum = parseResult.ParamValues?.Sum(x => x.Values.OrderByDescending(y => y.Score).FirstOrDefault().Score) ?? 0;
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argValuesScore = argValuesSum / match.Command.Parameters.Count;
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paramValuesScore = paramValuesSum / match.Command.Parameters.Count;
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}
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var totalArgsScore = (argValuesScore + paramValuesScore) / 2;
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return match.Command.Priority + totalArgsScore * 0.99f;
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}
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//Order the parse results by their score so that we choose the most likely result to execute
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var parseResults = parseResultsDict
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.OrderByDescending(x => CalculateScore(x.Key, x.Value));
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var successfulParses = parseResults
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.Where(x => x.Value.IsSuccess)
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.ToArray();
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if (successfulParses.Length == 0)
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{
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//All parses failed, return the one from the highest priority command, using score as a tie breaker
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var bestMatch = parseResults
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.FirstOrDefault(x => !x.Value.IsSuccess);
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return (false, bestMatch.Value.ErrorReason, commands[0].Command);
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}
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var cmd = successfulParses[0].Key.Command;
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// Bot will ignore commands which are ran more often than what specified by
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// GlobalCommandsCooldown constant (miliseconds)
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if (!UsersOnShortCooldown.Add(context.Message.Author.Id))
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return (false, null, cmd);
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//return SearchResult.FromError(CommandError.Exception, "You are on a global cooldown.");
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var commandName = cmd.Aliases.First();
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foreach (var exec in _lateBlockers)
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{
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if (await exec.TryBlockLate(_client, context.Message, context.Guild, context.Channel, context.User, cmd.Module.GetTopLevelModule().Name, commandName).ConfigureAwait(false))
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{
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_log.Info("Late blocking User [{0}] Command: [{1}] in [{2}]", context.User, commandName, exec.GetType().Name);
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return (false, null, cmd);
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}
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}
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//If we get this far, at least one parse was successful. Execute the most likely overload.
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var chosenOverload = successfulParses[0];
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var execResult = (ExecuteResult)await chosenOverload.Key.ExecuteAsync(context, chosenOverload.Value, services).ConfigureAwait(false);
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if (execResult.Exception != null && (!(execResult.Exception is HttpException he) || he.DiscordCode != 50013))
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{
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lock (errorLogLock)
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{
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var now = DateTime.Now;
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File.AppendAllText($"./command_errors_{now:yyyy-MM-dd}.txt",
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$"[{now:HH:mm-yyyy-MM-dd}]" + Environment.NewLine
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+ execResult.Exception.ToString() + Environment.NewLine
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+ "------" + Environment.NewLine);
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_log.Warn(execResult.Exception);
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}
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}
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return (true, null, cmd);
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}
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private readonly object errorLogLock = new object();
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}
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} |