separate page/site stats API endpoints to lower memory usage

pages/api/count.ts

@@ -0,0 +1,47 @@
+import { prisma } from "../../lib/helpers/prisma";
+import { logServerError } from "../../lib/helpers/sentry";
+import type { NextApiRequest, NextApiResponse } from "next";
+import type { PageStats } from "../../types";
+
+const handler = async (req: NextApiRequest, res: NextApiResponse) => {
+  try {
+    if (!req.query?.slug) {
+      return res.status(400).json({ message: "Missing `slug` parameter." });
+    }
+
+    // add one to this page's count and return the new number
+    const result = await incrementPageHits(req.query.slug as string);
+
+    // disable caching on both ends
+    res.setHeader("Cache-Control", "private, no-cache, no-store, must-revalidate");
+
+    // send result as JSON
+    return res.status(200).json(result);
+  } catch (error) {
+    // extract just the error message to send back to client
+    const message = error instanceof Error ? error.message : error;
+
+    // log full error to console and sentry
+    await logServerError(error);
+
+    // 500 Internal Server Error
+    return res.status(500).json({ message });
+  }
+};
+
+const incrementPageHits = async (slug: string): Promise<PageStats> => {
+  const { hits } = await prisma.hits.upsert({
+    where: { slug },
+    create: { slug },
+    update: {
+      hits: {
+        increment: 1,
+      },
+    },
+  });
+
+  // send client the *new* hit count
+  return { hits };
+};
+
+export default handler;