Refactor API URL route and middleware, add Prisma errors

src/app/api/url/route.ts

@@ -1,10 +1,10 @@
-import type { NextRequest } from "next/server";
-
+import { Prisma } from "@prisma/client";
 import { NextResponse } from "next/server";
 import { db } from "@/server/db";
 
-export const GET = async (req: NextRequest) => {
-  const params = req.nextUrl.searchParams.get("slug");
+export const GET = async (req: Request) => {
+  const url = new URL(req.url);
+  const params = url.searchParams.get("slug");
   const newHeaders = new Headers(req.headers);
 
   // If no slug provided (500):
@@ -15,38 +15,45 @@ export const GET = async (req: NextRequest) => {
     );
   }
 
-  // Search for the slug in the database:
-  const getLinkFromServer = await db.links.findUnique({
-    where: {
-      slug: params,
-    },
-  });
+  try {
+    const getLinkFromServer = await db.links.findUnique({
+      where: {
+        slug: params,
+      },
+    });
+
+    if (!getLinkFromServer) {
+      return NextResponse.json(
+        { error: "Error: Slug not found or invalid." },
+        { status: 404 },
+      );
+    }
+
+    await db.links.update({
+      where: {
+        id: getLinkFromServer.id,
+      },
+      data: {
+        clicks: {
+          increment: 1,
+        },
+      },
+    });
+
+    newHeaders.set("cache-control", "public, max-age=31536000, immutable");
 
-  // If no link found (404):
-  if (!getLinkFromServer) {
     return NextResponse.json(
-      { error: "Error: Slug not found or invalid." },
-      { status: 404 },
+      { message: "Link already exists.", url: getLinkFromServer.url },
+      { headers: newHeaders, status: 200 },
+    );
+  } catch (error) {
+    if (error instanceof Prisma.PrismaClientKnownRequestError) {
+      console.log(`🚧 Error: ${error.message}`);
+      return NextResponse.json({ message: error.message }, { status: 400 });
+    }
+    return NextResponse.json(
+      { message: "Something went wrong." },
+      { status: 500 },
     );
   }
-
-  // Increment the clicks in the database:
-  await db.links.update({
-    where: {
-      id: getLinkFromServer.id,
-    },
-    data: {
-      clicks: {
-        increment: 1,
-      },
-    },
-  });
-
-  // Cache:
-  newHeaders.set("cache-control", "public, max-age=31536000, immutable");
-
-  // Redirect to the URL:
-  return NextResponse.json(getLinkFromServer, {
-    headers: newHeaders,
-  });
 };

src/middleware.ts

@@ -1,6 +1,8 @@
 import NextAuth from "next-auth";
 import authConfig from "@/auth.config";
 
+import { NextResponse } from "next/server";
+
 import {
   DEFAULT_LOGIN_REDIRECT_URL,
   apiAuthPrefix,
@@ -33,14 +35,16 @@ export default auth(async (req) => {
   // ⚙️ Is Auth Route. First, check is authenticated:
   if (isAuthRoute) {
     if (isLoggedIn) {
-      return Response.redirect(new URL(DEFAULT_LOGIN_REDIRECT_URL, nextUrl));
+      return NextResponse.redirect(
+        new URL(DEFAULT_LOGIN_REDIRECT_URL, nextUrl),
+      );
     }
     return;
   }
 
   // ⚙️ If Slug contains ``c``, redirect to /check/:slug:
   if (slugRoute && slugRoute.endsWith("&c")) {
-    return Response.redirect(
+    return NextResponse.redirect(
       new URL(`/check/${slugRoute.replace("&c", "")}`, nextUrl),
     );
   }
@@ -52,29 +56,32 @@ export default auth(async (req) => {
       callbackUrl += nextUrl.search;
     }
     const encodedCallbackUrl = encodeURIComponent(callbackUrl);
-    return Response.redirect(
+    return NextResponse.redirect(
       new URL(`/auth?callbackUrl=${encodedCallbackUrl}`, nextUrl),
     );
   }
 
   // ⚙️ Redirect using slug:
   // If not public route and not protected route:
   if (!isPublicRoute && !isProtectedRoute && !isCheckRoute) {
-    const data = await fetch(`${req.nextUrl.origin}/api/url?slug=${slugRoute}`);
-
-    if (data.status === 404) {
-      return;
-    }
-
-    const dataToJson = await data.json();
-
-    if (dataToJson.url) {
-      return Response.redirect(new URL(dataToJson.url as string).toString());
+    try {
+      const getDataApi = await fetch(
+        `${req.nextUrl.origin}/api/url?slug=${slugRoute}`,
+      );
+
+      if (getDataApi.status === 404) {
+        return;
+      }
+
+      const getDataUrl = await getDataApi.json();
+
+      if (getDataUrl?.url) {
+        return NextResponse.redirect(new URL(getDataUrl.url as string));
+      }
+    } catch (error) {
+      console.error("🚧 Error fetching slug: ", error);
     }
-
-    return;
   }
-
   return;
 });