feat(scanner): more work on the scanner and can now scan to prod no lst right now

lstMobile/src/lib/ZebraScanner.ts

@@ -0,0 +1,40 @@
+import {
+	type EmitterSubscription,
+	NativeEventEmitter,
+	NativeModules,
+} from "react-native";
+
+const { ZebraScanner } = NativeModules;
+
+const scannerEmitter = new NativeEventEmitter(ZebraScanner);
+
+export type ZebraScanResult = {
+	data: string;
+	labelType?: string;
+	source?: string;
+	timestamp: number;
+};
+
+export const zebraScanner = {
+	startListening() {
+		ZebraScanner.startListening();
+	},
+
+	stopListening() {
+		ZebraScanner.stopListening();
+	},
+
+	triggerScan() {
+		ZebraScanner.triggerScan();
+	},
+
+	 ensureProfile() {
+    ZebraScanner.ensureProfile();
+  },
+
+	addScanListener(
+		callback: (scan: ZebraScanResult) => void,
+	): EmitterSubscription {
+		return scannerEmitter.addListener("barcodeScanned", callback);
+	},
+};

lstMobile/src/lib/tcpScan.ts

@@ -0,0 +1,72 @@
+import TcpSocket from "react-native-tcp-socket";
+
+const STX = "\x02";
+const ETX = "\x03";
+
+type TcpResponse = {
+	success: boolean;
+	message: string;
+	data: string[];
+};
+
+/**
+ * Sends a Zebra-style TCP message:
+ * <STX>98@{scanned}<ETX>
+ */
+export async function sendTcpMessage(
+	scanned: string,
+	host: string,
+	port: number,
+	timeoutMs = 5000,
+): Promise<TcpResponse> {
+	return new Promise((resolve) => {
+		const responses: string[] = [];
+
+		const client = TcpSocket.createConnection({ host, port }, () => {
+			const payload = `${STX}98@${scanned}${ETX}`;
+
+			console.log("Sending TCP (raw):", payload);
+			console.log("Sending TCP (visible):", `<stx>98@${scanned}<etx>`);
+
+			client.write(payload);
+		});
+
+		const timeout = setTimeout(() => {
+			client.destroy();
+
+			resolve({
+				success: false,
+				message: "TCP timeout",
+				data: responses,
+			});
+		}, timeoutMs);
+
+		client.on("data", (data) => {
+			const text = data.toString();
+			console.log("TCP received:", text);
+
+			responses.push(text);
+		});
+
+		client.on("error", (err) => {
+			clearTimeout(timeout);
+			client.destroy();
+
+			resolve({
+				success: false,
+				message: err.message,
+				data: responses,
+			});
+		});
+
+		client.on("close", () => {
+			clearTimeout(timeout);
+
+			resolve({
+				success: true,
+				message: "TCP complete",
+				data: responses,
+			});
+		});
+	});
+}