Merge pull request #84 from pandaninjas/main

src/index.ts

@@ -10,13 +10,14 @@ import { reuploadCommands } from './_reupload';
 import * as BuildConfig from './constants';
 import { parseLog } from './logs';
 import { getLatestMinecraftVersion } from './utils/remoteVersions';
+import { expandDiscordLink } from './utils/resolveMessage';
 
 import { membersCommand } from './commands/members';
 import { starsCommand } from './commands/stars';
 import { modrinthCommand } from './commands/modrinth';
 import { tagsCommand } from './commands/tags';
 import { jokeCommand } from './commands/joke';
-import { roryCommand } from "./commands/rory";
+import { roryCommand } from './commands/rory';
 
 import random from 'just-random';
 import { green, bold, yellow, cyan } from 'kleur/colors';
@@ -87,12 +88,12 @@ client.once('ready', async () => {
         `${random(BuildConfig.ETA_MESSAGES)} <:pofat:1031701005559144458>`
       );
     }
-
     const log = await parseLog(e.content);
     if (log != null) {
       e.reply({ embeds: [log] });
       return;
     }
+    await expandDiscordLink(e);
   });
 });
 
@@ -121,7 +122,7 @@ client.on('interactionCreate', async (interaction) => {
       await tagsCommand(interaction);
     } else if (commandName === 'joke') {
       await jokeCommand(interaction);
-    } else if (commandName === "rory") {
+    } else if (commandName === 'rory') {
       await roryCommand(interaction);
     }
   }

src/utils/resolveMessage.ts

@@ -0,0 +1,93 @@
+import {
+  ActionRowBuilder,
+  ButtonBuilder,
+  ButtonStyle,
+  Colors,
+  EmbedBuilder,
+  type Message,
+  ThreadChannel,
+} from 'discord.js';
+
+function findFirstImage(message: Message): string | undefined {
+  const result = message.attachments.find((attach) => {
+    return attach.contentType?.startsWith('image/');
+  });
+  if (result == undefined) {
+    return undefined;
+  } else {
+    return result.url;
+  }
+}
+
+export async function expandDiscordLink(message: Message): Promise<void> {
+  const re =
+    /(https?:\/\/)?(?:canary\.|ptb\.)?discord(?:app)?\.com\/channels\/(?<server_id>\d+)\/(?<channel_id>\d+)\/(?<message_id>\d+)/g;
+
+  const results = message.content.matchAll(re);
+
+  let n = 0;
+
+  for (const r of results) {
+    if (n >= 3)
+      break; // only process three previews
+
+    if (r.groups == undefined && r.groups.server_id != message.guildId)
+      continue; // do not let the bot leak messages from one server to another
+
+    const channel = await message.guild?.channels.fetch(
+      r.groups.channel_id
+    );
+
+    if (!channel || !channel.isTextBased())
+      continue;
+
+    if (channel instanceof ThreadChannel) {
+      if (!channel.parent?.members?.some((user) => user.id == message.author.id))
+        continue; // do not reveal a message to a user who can't see it
+    } else {
+      if (!channel.members?.some((user) => user.id == message.author.id))
+        continue; // do not reveal a message to a user who can't see it
+    }
+
+    try {
+      const messageToShow = await channel.messages.fetch(r.groups.message_id);
+
+      const builder = new EmbedBuilder()
+        .setAuthor({
+          name: `${messageToShow.author.username}#${messageToShow.author.discriminator}`,
+          iconURL: messageToShow.author.displayAvatarURL(),
+        })
+        .setColor(Colors.Aqua)
+        .setTimestamp(messageToShow.createdTimestamp)
+        .setFooter({ text: `#${messageToShow.channel.name}`})
+      if (messageToShow.content) {
+        builder.setDescription(messageToShow.content);
+      }
+      if (messageToShow.attachments.size > 0) {
+        let attachmentsString = '';
+        messageToShow.attachments.forEach((value) => {
+          attachmentsString += `[${value.name}](${value.url}) `;
+        });
+
+        builder.addFields({ name: 'Attachments', value: attachmentsString });
+
+        const firstImage = findFirstImage(messageToShow);
+        if (firstImage != undefined) {
+          builder.setImage(firstImage);
+        }
+      }
+
+      const row = new ActionRowBuilder<ButtonBuilder>().addComponents(
+        new ButtonBuilder()
+          .setLabel('Jump to original message')
+          .setStyle(ButtonStyle.Link)
+          .setURL(messageToShow.url)
+      );
+
+      await message.reply({ embeds: [builder], components: [row], allowedMentions: {repliedUser: false}});
+      n++;
+    } catch (e) {
+      console.error(e);
+    }
+  }
+}