node_modules/workerpool/dist/worker.js

/**
 * workerpool.js
 * https://github.com/josdejong/workerpool
 *
 * Offload tasks to a pool of workers on node.js and in the browser.
 *
 * @version 6.1.4
 * @date    2021-04-05
 *
 * @license
 * Copyright (C) 2014-2020 Jos de Jong <wjosdejong@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy
 * of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

/******/ (function() { // webpackBootstrap
var __webpack_exports__ = {};
// This entry need to be wrapped in an IIFE because it uses a non-standard name for the exports (exports).
!function() {
var exports = __webpack_exports__;
var __webpack_unused_export__;
function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

/**
 * worker must be started as a child process or a web worker.
 * It listens for RPC messages from the parent process.
 */
// source of inspiration: https://github.com/sindresorhus/require-fool-webpack
var requireFoolWebpack = eval('typeof require !== \'undefined\'' + ' ? require' + ' : function (module) { throw new Error(\'Module " + module + " not found.\') }');
/**
 * Special message sent by parent which causes the worker to terminate itself.
 * Not a "message object"; this string is the entire message.
 */

var TERMINATE_METHOD_ID = '__workerpool-terminate__'; // var nodeOSPlatform = require('./environment').nodeOSPlatform;
// create a worker API for sending and receiving messages which works both on
// node.js and in the browser

var worker = {
  exit: function exit() {}
};

if (typeof self !== 'undefined' && typeof postMessage === 'function' && typeof addEventListener === 'function') {
  // worker in the browser
  worker.on = function (event, callback) {
    addEventListener(event, function (message) {
      callback(message.data);
    });
  };

  worker.send = function (message) {
    postMessage(message);
  };
} else if (typeof process !== 'undefined') {
  // node.js
  var WorkerThreads;

  try {
    WorkerThreads = requireFoolWebpack('worker_threads');
  } catch (error) {
    if (_typeof(error) === 'object' && error !== null && error.code === 'MODULE_NOT_FOUND') {// no worker_threads, fallback to sub-process based workers
    } else {
      throw error;
    }
  }

  if (WorkerThreads &&
  /* if there is a parentPort, we are in a WorkerThread */
  WorkerThreads.parentPort !== null) {
    var parentPort = WorkerThreads.parentPort;
    worker.send = parentPort.postMessage.bind(parentPort);
    worker.on = parentPort.on.bind(parentPort);
  } else {
    worker.on = process.on.bind(process);
    worker.send = process.send.bind(process); // register disconnect handler only for subprocess worker to exit when parent is killed unexpectedly

    worker.on('disconnect', function () {
      process.exit(1);
    });
    worker.exit = process.exit.bind(process);
  }
} else {
  throw new Error('Script must be executed as a worker');
}

function convertError(error) {
  return Object.getOwnPropertyNames(error).reduce(function (product, name) {
    return Object.defineProperty(product, name, {
      value: error[name],
      enumerable: true
    });
  }, {});
}
/**
 * Test whether a value is a Promise via duck typing.
 * @param {*} value
 * @returns {boolean} Returns true when given value is an object
 *                    having functions `then` and `catch`.
 */


function isPromise(value) {
  return value && typeof value.then === 'function' && typeof value["catch"] === 'function';
} // functions available externally


worker.methods = {};
/**
 * Execute a function with provided arguments
 * @param {String} fn     Stringified function
 * @param {Array} [args]  Function arguments
 * @returns {*}
 */

worker.methods.run = function run(fn, args) {
  var f = new Function('return (' + fn + ').apply(null, arguments);');
  return f.apply(f, args);
};
/**
 * Get a list with methods available on this worker
 * @return {String[]} methods
 */


worker.methods.methods = function methods() {
  return Object.keys(worker.methods);
};

var currentRequestId = null;
worker.on('message', function (request) {
  if (request === TERMINATE_METHOD_ID) {
    return worker.exit(0);
  }

  try {
    var method = worker.methods[request.method];

    if (method) {
      currentRequestId = request.id; // execute the function

      var result = method.apply(method, request.params);

      if (isPromise(result)) {
        // promise returned, resolve this and then return
        result.then(function (result) {
          worker.send({
            id: request.id,
            result: result,
            error: null
          });
          currentRequestId = null;
        })["catch"](function (err) {
          worker.send({
            id: request.id,
            result: null,
            error: convertError(err)
          });
          currentRequestId = null;
        });
      } else {
        // immediate result
        worker.send({
          id: request.id,
          result: result,
          error: null
        });
        currentRequestId = null;
      }
    } else {
      throw new Error('Unknown method "' + request.method + '"');
    }
  } catch (err) {
    worker.send({
      id: request.id,
      result: null,
      error: convertError(err)
    });
  }
});
/**
 * Register methods to the worker
 * @param {Object} methods
 */

worker.register = function (methods) {
  if (methods) {
    for (var name in methods) {
      if (methods.hasOwnProperty(name)) {
        worker.methods[name] = methods[name];
      }
    }
  }

  worker.send('ready');
};

worker.emit = function (payload) {
  if (currentRequestId) {
    worker.send({
      id: currentRequestId,
      isEvent: true,
      payload: payload
    });
  }
};

if (true) {
  __webpack_unused_export__ = worker.register;
  __webpack_unused_export__ = worker.emit;
}
}();
/******/ })()
;
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