8.5 월간집계: 월별 지표 산출 배치/차트/다운로드(CSV) o

src/app/api/stats/monthly/route.ts

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+import { NextResponse } from "next/server";
+import prisma from "@/lib/prisma";
+
+export async function GET(req: Request) {
+  const { searchParams } = new URL(req.url);
+  const year = Number(searchParams.get("year")) || new Date().getFullYear();
+  const month = Number(searchParams.get("month")) || new Date().getMonth() + 1; // 1-12
+  const start = new Date(year, month - 1, 1);
+  const end = new Date(year, month, 1);
+
+  const posts = await prisma.post.count({ where: { createdAt: { gte: start, lt: end } } });
+  const comments = await prisma.comment.count({ where: { createdAt: { gte: start, lt: end } } });
+  const users = await prisma.user.count({ where: { createdAt: { gte: start, lt: end } } });
+  const reports = await prisma.report.count({ where: { createdAt: { gte: start, lt: end } } });
+
+  return NextResponse.json({ year, month, metrics: { posts, comments, users, reports } });
+}
+
+