feat: backend route for generating qr codes out of data

backend/src/routes/generateqrcode.route.ts

@@ -0,0 +1,33 @@
+import { FastifyInstance, FastifyReply, FastifyRequest } from "fastify";
+import QRCode from "qrcode";
+
+interface RequestBody {
+  text: string;
+}
+
+export async function generateQRCode(app: FastifyInstance) {
+  app.post(
+    "/api/generate-qrcode",
+    async (
+      request: FastifyRequest<{ Body: RequestBody }>,
+      reply: FastifyReply,
+    ) => {
+      const data = request.body;
+
+      if (!data) {
+        return reply.status(400).send({ error: "Missing data parameter" });
+      }
+
+      try {
+        const qrCodeDataUrl = QRCode.toDataURL(data.text);
+        return reply
+          .header("Content-Type", "application/json")
+          .status(200)
+          .send({ qrCode: qrCodeDataUrl });
+      } catch (error) {
+        console.error("QR Code generation error:", error);
+        reply.status(500).send({ error: "Error generating QR code" });
+      }
+    },
+  );
+}