Fetch target user from audit log

src/events/channelUpdate.ts

@@ -1,5 +1,5 @@
 import client from "../client";
-import { Events } from "discord.js";
+import { AuditLogEvent, Events, GuildAuditLogsEntry, PermissionFlagsBits, User } from "discord.js";
 import { getGuildSetting } from "../tools/data";
 import { Badword, database } from "../data";
 import { IsNull } from "typeorm";
@@ -27,7 +27,7 @@ client.on(Events.ChannelUpdate, async (oldChannel, newChannel) => {
 
     const blocklist = [...globalBlocklist, ...localBlocklist];
     let found: string | null = null;
-    
+
     for (let i = 0; i < blocklist.length; i++) {
         const word = blocklist[i];
         if (!word) continue;
@@ -39,6 +39,33 @@ client.on(Events.ChannelUpdate, async (oldChannel, newChannel) => {
 
     if (found === null) return;
 
+    let responsibleUser: User | null;
+
+    try {
+        const clientMember = await guild.members.fetchMe();
+        const canSeeAuditLog = clientMember.permissions.has(PermissionFlagsBits.ViewAuditLog);
+        const auditLogs = canSeeAuditLog ? await guild.fetchAuditLogs({
+            type: AuditLogEvent.ChannelUpdate,
+            limit: 50
+        }) : undefined;
+
+        const change = auditLogs?.entries.filter((entry) => {
+            if (entry.target.id !== newChannel.id) return false;
+
+            return entry.changes.filter((change) => {
+                return change.key === "name" && change.new === newChannel.name;
+            }).length > 0;
+        }).reduce<null | GuildAuditLogsEntry<AuditLogEvent.ChannelUpdate, "Update", "Channel", AuditLogEvent.ChannelUpdate>>((unknown, curr) => {
+            if (!unknown) return curr;
+            const prev = unknown as GuildAuditLogsEntry<AuditLogEvent.ChannelUpdate, "Update", "Channel", AuditLogEvent.ChannelUpdate>
+            return curr.createdTimestamp > prev.createdTimestamp ? curr : prev;
+        }, null);
+
+        responsibleUser = change?.executor || null;
+    } catch (error) {
+        responsibleUser = null;
+    }
+
     const logChannel = settings.notificationChannelID ? await getGuildChannel(guild.id, settings.notificationChannelID) : null;
 
     try {
@@ -51,6 +78,9 @@ client.on(Events.ChannelUpdate, async (oldChannel, newChannel) => {
         embed.addFields({
             name: "Detected banned word:",
             value: `||${found}||`
+        }, {
+            name: "Channel renamed by:",
+            value: responsibleUser ? `${responsibleUser.tag} (${responsibleUser.id})` : "`Couldn't detect responsible user :(`"
         });
 
         logChannel.send({
@@ -68,6 +98,9 @@ client.on(Events.ChannelUpdate, async (oldChannel, newChannel) => {
         name: "Detected banned word:",
         value: `||${found}||`,
         inline: true
+    }, {
+        name: "Channel renamed by:",
+        value: responsibleUser ? `${responsibleUser.tag} (${responsibleUser.id})` : "`Couldn't detect responsible user :(`"
     });
 
     logChannel.send({