feat: show monthly new users

packages/lib/server-only/user/get-user-monthly-growth.ts

@@ -0,0 +1,32 @@
+import { DateTime } from 'luxon';
+
+import { prisma } from '@documenso/prisma';
+
+export type GetUserMonthlyGrowthResult = Array<{
+  month: string;
+  count: number;
+}>;
+
+type GetUserMonthlyGrowthQueryResult = Array<{
+  month: Date;
+  count: bigint;
+}>;
+
+export const getUserMonthlyGrowth = async () => {
+  const result = await prisma.$queryRaw<GetUserMonthlyGrowthQueryResult>`
+    SELECT
+      DATE_TRUNC('month', "createdAt") AS "month",
+      COUNT("id") AS "count"
+    FROM "User"
+    GROUP BY "month"
+    ORDER BY "month" DESC
+    LIMIT 12
+  `;
+
+  console.log('result', result);
+
+  return result.map((row) => ({
+    month: DateTime.fromJSDate(row.month).toFormat('yyyy-MM'),
+    count: Number(row.count),
+  }));
+};