74 lines
3.2 KiB
C#
74 lines
3.2 KiB
C#
using Discord;
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namespace RegexBot.Modules.RegexModerator;
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/// <summary>
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/// The namesake of RegexBot. This module allows users to define pattern-based rules with other constraints.
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/// When triggered, one or more actions are executed as defined in its configuration.
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/// </summary>
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[RegexbotModule]
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internal class RegexModerator : RegexbotModule {
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public RegexModerator(RegexbotClient bot) : base(bot) {
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DiscordClient.MessageReceived += DiscordClient_MessageReceived;
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DiscordClient.MessageUpdated += DiscordClient_MessageUpdated;
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}
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public override Task<object?> CreateGuildStateAsync(ulong guildID, JToken config) {
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if (config == null) return Task.FromResult<object?>(null);
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var defs = new List<ConfDefinition>();
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if (config.Type != JTokenType.Array)
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throw new ModuleLoadException(Name + " configuration must be a JSON array.");
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// TODO better error reporting during this process
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foreach (var def in config.Children<JObject>())
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defs.Add(new ConfDefinition(def));
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if (defs.Count == 0) return Task.FromResult<object?>(null);
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Log(DiscordClient.GetGuild(guildID), $"Loaded {defs.Count} definition(s).");
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return Task.FromResult<object?>(defs.AsReadOnly());
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}
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private Task DiscordClient_MessageReceived(SocketMessage arg) => ReceiveIncomingMessage(arg);
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private Task DiscordClient_MessageUpdated(Cacheable<Discord.IMessage, ulong> arg1, SocketMessage arg2, ISocketMessageChannel arg3) {
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// Ignore embed edits (see comment in MessageCachingSubservice)
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if (!arg2.EditedTimestamp.HasValue) return Task.CompletedTask;
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return ReceiveIncomingMessage(arg2);
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}
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/// <summary>
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/// Does initial message checking before further processing.
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/// </summary>
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private async Task ReceiveIncomingMessage(SocketMessage msg) {
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if (!Common.Utilities.IsValidUserMessage(msg, out var ch)) return;
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// Get config?
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var defs = GetGuildState<IEnumerable<ConfDefinition>>(ch.Guild.Id);
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if (defs == null) return;
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// Send further processing to thread pool.
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// Match checking is a CPU-intensive task, thus very little checking is done here.
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var msgProcessingTasks = new List<Task>();
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foreach (var item in defs) {
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// Need to check sender's moderator status here. Definition can't access mod list.
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var isMod = GetModerators(ch.Guild.Id).IsListMatch(msg, true);
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var match = item.IsMatch(msg, isMod);
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msgProcessingTasks.Add(Task.Run(async () => await ProcessMessage(item, ch.Guild, msg, isMod)));
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}
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await Task.WhenAll(msgProcessingTasks);
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}
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/// <summary>
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/// Does further message checking and response execution.
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/// Invocations of this method are meant to be placed onto a thread separate from the caller.
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/// </summary>
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private async Task ProcessMessage(ConfDefinition def, SocketGuild g, SocketMessage msg, bool isMod) {
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if (!def.IsMatch(msg, isMod)) return;
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// TODO logging options for match result; handle here?
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var executor = new ResponseExecutor(def, Bot, msg, (string logLine) => Log(g, logLine));
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await executor.Execute();
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}
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}
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