Added On-demand revalidation

src/pages/api/revalidate.ts

@@ -0,0 +1,50 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+
+export type RequestMailProps = {
+  event: "entry.update" | "entry.delete" | "entry.create";
+  model: string;
+  entry: {
+    slug: string;
+  };
+};
+
+export type ResponseMailProps = {
+  message: string;
+  revalidated: boolean;
+};
+
+export default async function Mail(
+  req: NextApiRequest,
+  res: NextApiResponse<ResponseMailProps>
+) {
+  console.log(req.body);
+  const body = req.body as RequestMailProps;
+
+  // Check for secret to confirm this is a valid request
+  if (
+    req.headers.authorization !== `Bearer ${process.env.REVALIDATION_TOKEN}`
+  ) {
+    return res
+      .status(401)
+      .json({ message: "Invalid token", revalidated: false });
+  }
+
+  const uRLsToRevalidate: string[] = [];
+
+  if (body.model === "post") {
+    uRLsToRevalidate.push(`/news/${body.entry.slug}`);
+  }
+
+  console.table(uRLsToRevalidate);
+
+  try {
+    uRLsToRevalidate.map(async (url) => await res.unstable_revalidate(url));
+    return res.json({ message: "Success!", revalidated: true });
+  } catch (err) {
+    // If there was an error, Next.js will continue
+    // to show the last successfully generated page
+    return res
+      .status(500)
+      .send({ message: "Error revalidating", revalidated: false });
+  }
+}