Add !message

docs/commands.md

@@ -75,6 +75,13 @@ This is mainly useful when reporting messages to Discord's Trust & Safety team.
 ### `!id`
 Prints the user's ID.
 
+### `!dm_channel_id`
+Prints the ID of the current DM channel with the user
+
+### `!message <number>`
+Shows the DM channel ID, DM message ID, and message link of the specified user reply.
+`<number>` is the message number shown in brackets before the user reply in the thread.
+
 ## Anywhere on the inbox server
 These commands can be used anywhere on the inbox server, even outside Modmail threads.
 

src/modules/id.js

@@ -1,3 +1,6 @@
+const ThreadMessage = require("../data/ThreadMessage");
+const utils = require("../utils");
+
 module.exports = ({ bot, knex, config, commands }) => {
   commands.addInboxThreadCommand("id", [], async (msg, args, thread) => {
     thread.postSystemMessage(thread.user_id);
@@ -7,4 +10,29 @@ module.exports = ({ bot, knex, config, commands }) => {
     const dmChannel = await thread.getDMChannel();
     thread.postSystemMessage(dmChannel.id);
   });
+
+  commands.addInboxThreadCommand("message", "<messageNumber:number>", async (msg, args, thread) => {
+    /** @type {ThreadMessage} */
+    const threadMessage = await thread.findThreadMessageByMessageNumber(args.messageNumber);
+    if (! threadMessage) {
+      thread.postSystemMessage("No message in this thread with that number");
+      return;
+    }
+
+    const channelId = threadMessage.dm_channel_id;
+    // In specific rare cases, such as createThreadOnMention, a thread message may originate from a main server
+    const channelIdServer = utils.getMainGuilds().find(g => g.channels.has(channelId));
+    const messageLink = channelIdServer
+      ? `https://discord.com/channels/${channelIdServer.id}/${channelId}/${threadMessage.dm_message_id}`
+      : `https://discord.com/channels/@me/${channelId}/${threadMessage.dm_message_id}`;
+
+    const parts = [
+      `Details for message \`[${threadMessage.message_number}]\`:`,
+      `Channel ID: \`${channelId}\``,
+      `Message ID: \`${threadMessage.dm_message_id}\``,
+      `Link: <${messageLink}>`,
+    ];
+
+    thread.postSystemMessage(parts.join("\n"));
+  });
 };