All files / web_socket/agents/client agentPrinter.js

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/* eslint-disable import/no-unresolved */
/* eslint-disable import/extensions */
/* eslint-disable no-console */
 
const path = require('path');
const fs = require('fs');
const { Worker } = require('worker_threads');
 
const printZPLWorkerRawContent = require('./bundle/printZPLWorker.js');
 
let socket;
let PATH_TEMP;
let JOB_PRINTER_FILE_PATH;
 
const initialize = (currentDir, tempFolderDirParam) => {
  PATH_TEMP = tempFolderDirParam;
 
  const jobsFilesPath = path.resolve(currentDir, 'jobs');
  JOB_PRINTER_FILE_PATH = path.resolve(jobsFilesPath, 'printZPLWorker.js');
 
  const makePaths = (pathsFolder) =>
    pathsFolder.forEach(
      (pathFolder) =>
        !fs.existsSync(pathFolder) &&
        fs.mkdirSync(pathFolder, { recursive: true })
    );
 
  const makeFiles = (pathsFiles) =>
    pathsFiles.forEach((pathFile) =>
      fs.writeFileSync(pathFile.path, pathFile.content)
    );
 
  makePaths([jobsFilesPath]);
  makeFiles([
    { path: JOB_PRINTER_FILE_PATH, content: printZPLWorkerRawContent },
  ]);
};
 
const workerMessage = (
  name = 'Print Worker',
  workerMessageData = null,
  resolve = () => false,
  reject = () => false
) => {
  try {
    if (workerMessageData === 'done') resolve(true);
    else console.log(`${name}: ${JSON.stringify(workerMessageData)}`);
  } catch (e) {
    console.log(`${name}: ${e.message}`);
    reject(e.message);
  }
 
  reject(workerMessageData);
};
 
async function printZPL(printer, label, type = 'ean') {
  return new Promise((resolve, reject) => {
    const worker = new Worker(JOB_PRINTER_FILE_PATH, {
      workerData: { printer, label, type, PATH_TEMP },
    });
    worker.on('message', (message) =>
      workerMessage('printZPLWorker', message, resolve, reject)
    );
    worker.on('error', reject);
    worker.on('exit', (code) => {
      if (code !== 0) {
        reject(new Error(`Worker stopped with exit code ${code}`));
      } else {
        resolve(true);
      }
    });
  });
}
 
// Event for printer received from server
const printerEvent = async (data = {}, callback = () => false) => {
  const response = {
    success: false,
    message: '',
  };
 
  try {
    await printZPL(data.printer, data.label, data.type);
    response.success = true;
  } catch (e) {
    response.message = typeof e === 'object' ? e.message : e;
  }
 
  // Return response to server
  callback(response);
};
 
const addSocketEvents = (socketClient) => {
  socket = socketClient;
 
  socket.removeAllListeners('printer-event');
  socket.on('printer-event', printerEvent);
};
 
module.exports = {
  initialize,
  addSocketEvents,
};