90 lines
3.7 KiB
C#
90 lines
3.7 KiB
C#
using Discord.WebSocket;
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using Newtonsoft.Json.Linq;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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namespace RegexBot.Modules.RegexModerator
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{
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/// <summary>
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/// The 'star' feature of Kerobot. Users define pattern-based rules with other constraints.
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/// When triggered, each rule executes one or more different actions.
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/// </summary>
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[RegexbotModule]
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public class RegexModerator : ModuleBase
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{
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public RegexModerator(RegexbotClient bot) : base(bot)
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{
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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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{
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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(this.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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return Task.FromResult<object>(defs.AsReadOnly());
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}
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private Task DiscordClient_MessageUpdated(Discord.Cacheable<Discord.IMessage, ulong> arg1,
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SocketMessage arg2, ISocketMessageChannel arg3)
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=> ReceiveIncomingMessage(arg2);
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private Task DiscordClient_MessageReceived(SocketMessage arg) => ReceiveIncomingMessage(arg);
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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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{
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if (msg.Author.Id == 0)
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{
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// TODO what changed to cause this? this wasn't happening before.
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System.Console.WriteLine($"Skip processing of message with empty metadata. Msg ID {msg.Id} - Msg content: {msg.Content} - Embed count: {msg.Embeds.Count}");
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return;
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}
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// Ignore non-guild channels
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if (!(msg.Channel is SocketGuildChannel 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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{
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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, 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, SocketMessage msg, bool isMod)
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{
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// Reminder: IsMatch handles matching execution time
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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, BotClient);
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await executor.Execute(msg);
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}
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}
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}
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