Recursive alt check

src/events/handle-member-join.ts

@@ -6,23 +6,41 @@ export async function handleMemberJoin(member: GuildMember) {
   const guildSettings = await Database.getGuildSettings(member.guild.id);
 
   if (guildSettings?.new_member_channel_id) {
-    const e621UserIds = await Database.getE621Ids(member.id);
     const channel = await member.guild.channels.fetch(guildSettings.new_member_channel_id) as GuildTextBasedChannel;
 
     if (channel) {
-      let content = `${member.toString()}'s e621 and discord account(s):\n`;
-
-      for (const e621Id of e621UserIds) {
-        content += `- ${config.E621_BASE_URL}/users/${e621Id}\n`;
-
-        const discordIds = await Database.getDiscordIds(e621Id);
-
-        for (const discordId of discordIds) {
-          content += `- - <@${discordId}>\n`;
-        }
-      }
+      const content = `${member.toString()}'s e621 and discord account(s):\n${await getE621Alts(member.id)}`;
 
       channel.send(content).catch(console.error);
     }
   }
+}
+
+async function getE621Alts(discordId: string, depth = 1, ignore: number[] = []): Promise<string> {
+  const e621UserIds = await Database.getE621Ids(discordId);
+
+  const toIgnore = ignore.concat(e621UserIds);
+
+  let content = '';
+
+  for (const e621Id of e621UserIds) {
+    if (ignore.includes(e621Id)) continue;
+    content += `${'- '.repeat(depth)}${config.E621_BASE_URL}/users/${e621Id}\n${await getDiscordAlts(e621Id, depth + 1, toIgnore)}`;
+  }
+
+  return content;
+}
+
+async function getDiscordAlts(e621Id: number, depth = 1, ignore: number[] = []): Promise<string> {
+  const discordIds = await Database.getDiscordIds(e621Id);
+
+  let content = '';
+
+  for (const discordId of discordIds) {
+    const alts = await getE621Alts(discordId, depth + 1, ignore);
+
+    if (alts) content += `${'- '.repeat(depth)}<@${discordId}>\n${alts}`;
+  }
+
+  return content;
 }