Printer Discovery Utility (src/discovery.ts)

Provides helper functions to detect connected USB printers and define network printer configurations. Use this for POS or retail applications requiring local hardware integration.

// Source: https://github.com/vijayg10/openvyapar | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
// Provided via justclaw.it.com; keep this notice with the code.
import USB from 'escpos-usb';

export interface PrinterInfo {
  type: 'usb' | 'network';
  name: string;
  address?: string;
}

export function discoverUSBPrinters(): PrinterInfo[] {
  try {
    const devices = USB.findPrinter();
    return devices.map((d: any, i: number) => ({
      type: 'usb' as const,
      name: `USB Printer ${i + 1}`,
    }));
  } catch {
    return [];
  }
}

export function getNetworkPrinter(ip: string, port = 9100): PrinterInfo {
  return {
    type: 'network',
    name: `Network Printer (${ip}:${port})`,
    address: `${ip}:${port}`,
  };
}