Add the source code

src/scheduler/qotd.ts

@@ -0,0 +1,45 @@
+import { Client, TextChannel } from 'discord.js';
+import { withConn } from '../db/pool.js';
+import { generateQOTD } from '../ai/gemini.js';
+
+export function startQotdScheduler(client: Client): void {
+  const run = async () => {
+    const today = new Date();
+    const yyyyMmDd = today.toISOString().slice(0, 10);
+
+    const guilds = await withConn(async (conn) => {
+      return conn.query(
+        'SELECT guild_id, qotd_channel_id, qotd_last_sent FROM guild_config WHERE qotd_enabled = 1 AND qotd_channel_id IS NOT NULL'
+      );
+    });
+
+    for (const row of guilds as any[]) {
+      if (row.qotd_last_sent && row.qotd_last_sent.toISOString().slice(0, 10) === yyyyMmDd) continue;
+      const channel = client.channels.cache.get(row.qotd_channel_id) as TextChannel | undefined;
+      if (!channel) continue;
+      try {
+        const question = await generateQOTD();
+        await channel.send(`QOTD: ${question}`);
+        await withConn((conn) => conn.query('UPDATE guild_config SET qotd_last_sent = ? WHERE guild_id = ?', [yyyyMmDd, row.guild_id]));
+      } catch (err) {
+        // ignore individual failures
+      }
+    }
+  };
+
+  // Run daily at 09:00 UTC
+  const scheduleNext = () => {
+    const now = new Date();
+    const next = new Date();
+    next.setUTCHours(9, 0, 0, 0);
+    if (next <= now) next.setUTCDate(next.getUTCDate() + 1);
+    setTimeout(async () => {
+      await run();
+      scheduleNext();
+    }, next.getTime() - now.getTime());
+  };
+
+  scheduleNext();
+}
+
+