feat(intial auth): intial auth setup for the scanner

backend/utils/generateScannerPin.utils.ts

@@ -0,0 +1,39 @@
+import { db } from "../db/db.controller.js";
+import { returnFunc } from "./returnHelper.utils.js";
+
+export function generateSixDigitPin() {
+	return Math.floor(100000 + Math.random() * 900000).toString();
+}
+
+export async function generateUniquePin() {
+	for (let i = 0; i < 10; i++) {
+		const pin = generateSixDigitPin();
+
+		const existing = await db.query.scanUser.findFirst({
+			where: (u, { eq }) => eq(u.pinHash, pin), // ⚠️ we'll fix this below
+		});
+
+		if (!existing)
+			return returnFunc({
+				success: true,
+				level: "info",
+				module: "utils",
+				subModule: "genPin",
+				message: "New pin generated",
+				data: [{ pin: pin }],
+				notify: false,
+				room: "",
+			});
+	}
+
+	return returnFunc({
+		success: false,
+		level: "error",
+		module: "utils",
+		subModule: "genPin",
+		message: "Failed to generate unique PIN after 10 attempts",
+		data: [],
+		notify: true,
+		room: "",
+	});
+}