feat(db): add next.js middleware

This middleware works together with next to authenticate the supabase session

db/middleware.ts

@@ -0,0 +1,78 @@
+import { createServerClient, type CookieOptions } from "@supabase/ssr";
+import { type NextRequest, NextResponse } from "next/server";
+
+export const updateSession = async (request: NextRequest) => {
+  // This `try/catch` block is only here for the interactive tutorial.
+  // Feel free to remove once you have Supabase connected.
+  try {
+    // Create an unmodified response
+    let response = NextResponse.next({
+      request: {
+        headers: request.headers,
+      },
+    });
+
+    const supabase = createServerClient(
+      process.env.NEXT_PUBLIC_SUPABASE_URL!,
+      process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+      {
+        cookies: {
+          get(name: string) {
+            return request.cookies.get(name)?.value;
+          },
+          set(name: string, value: string, options: CookieOptions) {
+            // If the cookie is updated, update the cookies for the request and response
+            request.cookies.set({
+              name,
+              value,
+              ...options,
+            });
+            response = NextResponse.next({
+              request: {
+                headers: request.headers,
+              },
+            });
+            response.cookies.set({
+              name,
+              value,
+              ...options,
+            });
+          },
+          remove(name: string, options: CookieOptions) {
+            // If the cookie is removed, update the cookies for the request and response
+            request.cookies.set({
+              name,
+              value: "",
+              ...options,
+            });
+            response = NextResponse.next({
+              request: {
+                headers: request.headers,
+              },
+            });
+            response.cookies.set({
+              name,
+              value: "",
+              ...options,
+            });
+          },
+        },
+      }
+    );
+
+    // This will refresh session if expired - required for Server Components
+    // https://supabase.com/docs/guides/auth/server-side/nextjs
+    await supabase.auth.getUser();
+
+    return response;
+  } catch (e) {
+    // If you are here, a Supabase client could not be created!
+    // This is likely because you have not set up environment variables.
+    // Check out http://localhost:3000 for Next Steps.
+    return NextResponse.next({
+      request: {
+        headers: request.headers,
+      },
+    });
+  }
+};