first pass analytics redo

src/lib/server/stats/digest.ts

@@ -0,0 +1,44 @@
+import type { SnapshotPayload } from '$lib/types/stats';
+import { sortSignals } from './signals';
+
+/** Compose the ~6-line plain-language daily digest. Pure / testable. */
+export function composeDigest(payload: SnapshotPayload): string {
+	const { activity, kpis } = payload;
+	const top = sortSignals(payload.signals)[0];
+	const lines = [
+		`**Bibdle stats — ${payload.asOfDate}**`,
+		`Players: ${activity.dau} today · ${activity.wau} this week · ${activity.mau} this month`,
+		`New ${activity.newPlayers} · returning ${activity.returningShare ?? '—'}% · net ${activity.netGrowth >= 0 ? '+' : ''}${activity.netGrowth}`,
+		`D1 return ${kpis.d1Return ?? '—'}% · 7-day ${kpis.return7 ?? '—'}%`,
+		top ? `Top signal: ${top.title} — ${top.detail}` : 'No signals.',
+		`https://bibdle.com/admin/stats?date=${payload.asOfDate}`
+	];
+	return lines.join('\n');
+}
+
+/**
+ * POST the digest to the admin Discord webhook. No-op (with a log) when the
+ * webhook is unset; never throws so a digest failure can't fail the build.
+ */
+export async function sendDigest(
+	payload: SnapshotPayload,
+	webhookUrl: string | undefined = Bun.env.DISCORD_ADMIN_WEBHOOK
+): Promise<boolean> {
+	const message = composeDigest(payload);
+	if (!webhookUrl) {
+		console.log('[stats] DISCORD_ADMIN_WEBHOOK not set; digest skipped:\n' + message);
+		return false;
+	}
+	try {
+		const res = await fetch(webhookUrl, {
+			method: 'POST',
+			headers: { 'Content-Type': 'application/json' },
+			body: JSON.stringify({ content: message })
+		});
+		if (!res.ok) console.error('[stats] digest webhook responded', res.status);
+		return res.ok;
+	} catch (err) {
+		console.error('[stats] digest failed', err);
+		return false;
+	}
+}