make oaf remind people not to talk about farming in the iotm channel (#…

…165)

* make oaf remind people not to talk about farming in the iotm channel

* actually make a thread

* month printing

* use `date-fns`

* further streamlining

src/subs.ts

@@ -1,8 +1,21 @@
-import { roleMention } from "discord.js";
+import { add, closestTo, format } from "date-fns";
+import { ThreadAutoArchiveDuration, roleMention } from "discord.js";
 
 import { discordClient } from "./clients/discord.js";
 import { config } from "./config.js";
 
+function determineIotmMonthYear() {
+  const today = new Date();
+
+  format(
+    closestTo(today, [
+      add(today, { months: 1 }).setDate(1),
+      add(today, { months: -1 }).setDate(1),
+    ]) ?? today,
+    "LLLL y",
+  );
+}
+
 export async function rollSubs() {
   const guild = await discordClient.guilds.fetch(config.GUILD_ID);
   const iotmChannel = guild?.channels.cache.get(config.IOTM_CHANNEL_ID);
@@ -17,12 +30,20 @@ export async function rollSubs() {
   const subRollEmoji =
     guild.emojis.cache.find((e) => e.name === "subsRolling") ?? "";
 
-  await iotmChannel.send({
+  const message = await iotmChannel.send({
     content: `🚨${subRollEmoji} Attention ${roleMention(
       config.SUBSCRIBER_ROLE_ID,
-    )}! This is an automated message to let you know that subscriptions are now rolling ${subRollEmoji}🚨`,
+    )}! This is an automated message to let you know that subscriptions are now rolling ${subRollEmoji}🚨
+    
+Feel free to discuss spading and speed strats here in the main channel; speculation about farming strategy should be done in the thread.`,
     allowedMentions: {
       roles: [config.SUBSCRIBER_ROLE_ID],
     },
   });
+
+  await message.startThread({
+    name: `Farming Discussion for ${determineIotmMonthYear()} IotM`,
+    autoArchiveDuration: ThreadAutoArchiveDuration.OneWeek,
+    reason: `to discuss & speculate about farming strategy for the ${determineIotmMonthYear()} IotM`,
+  });
 }