Thermal Ticket Printer

Thermal Ticket Printer is a npm package that provides a TypeScript class to process and print thermal tickets using a thermal printer. It supports rendering tickets from an XML template and printing them with customizable formatting options.

Installation

To use this module in your TypeScript project, you'll need to install the required dependencies:

npm install thermal-ticket-printer

Usage

1. Import the Module

   Import the ThermalTicketPrinter class from thermal-ticket-printer in your TypeScript file:

   import { ThermalTicketPrinter } from 'thermal-ticket-printer';

2. Prepare Ticket Data

   Define the data for your thermal ticket. For example:

   const ticketData = {
       current_date: '2024-04-03',
        items: [
            { name: 'Item 1', quantity: 2, price: 10.99 },
            { name: 'Item 2', quantity: 1, price: 5.99 },
        ],
        total_amount: 27.97,
   };

3. Define Printer Configuration

   Set up the printer configuration, including the interface (e.g., /dev/usb/lp2):

   const printerInterface: string = '/dev/usb/lp2'; // Your printer interface

4. Create Printer Instance

   Create an instance of ThermalTicketPrinter with the template path and printer interface:

   const printer = new ThermalTicketPrinter('path/to/your/template.xml', printerInterface);

5. Print the Ticket

   Call the printTicket method of the printer instance with the ticket data:

   printer.printTicket(ticketData)
       .then(() => {
           console.log('Ticket printed successfully.');
       })
       .catch((error) => {
           console.error('Error printing ticket:', error);
       });

XML Template

The XML template defines the structure of the thermal ticket. It follows a specific format and structure to properly render the ticket elements. Here's an example of an XML template:

<!DOCTYPE ticket SYSTEM "ticket-receipt.dtd">
<ticket width="32">
   <alignment alignment="CENTER">
      <img src="templates/resources/logo.png"/>
      <text underline="true" bold="true">Store Name</text>
      <linebreak/>
      <text>Date: {{ current_date }}</text>
   </alignment>
   <linebreak/>

   <table>
      <tr>
         <td width=".4">Item</td>
         <td width=".2">Qty</td>
         <td>Price</td>
      </tr>
      {{#items}}
      <tr>
         <td width=".4" alignment="LEFT">{{ name }}</td>
         <td width=".2" alignment="RIGHT">{{ quantity }}</td>
         <td alignment="RIGHT">{{ price }}</td>
      </tr>
      {{/items}}
   </table>
   <linebreak/>

   <text bold="true">Total: {{ total_amount }}€</text>
   <linebreak/>

   <text>Thank you for shopping with us!</text>
</ticket>

Modify this template to fit your specific ticket layout. The template uses placeholders ({{ ... }}) which will be replaced with the actual data when rendering the ticket.

Sample Files

The package includes sample files to help you get started:

• templates/ticket-receipt.dtd: This file is the DTD for a thermal ticket.
• templates/ticket-template.xml: This file is an example XML template for a thermal ticket.

You can use these sample files as templates for creating your own thermal tickets. To access them, install the package and navigate to the templates directory in the installed package directory.

There is also the full TS + XML sample files in the folder example to test rapidly the config

License

This module is licensed under the MIT License. Feel free to modify and use it in your projects.

Author

Created by Cabrasky - Javier Mateos Mata

Issues and Contributions

If you encounter any issues or have suggestions for improvement, please open an issue on the GitHub repository: thermal-ticket-printer

Contributions are welcome! Fork the repository, make your changes, and submit a pull request.