web-threads/dist/web-threads.js

generic threads using web workers for the web

'use strict';

function worker () {
  function getFunctionArguments(fn) {
    return fn.substring(fn.indexOf("(") + 1, fn.indexOf(")"));
  }
  function getFunctionContent(fn) {
    return fn.substring(fn.indexOf("{") + 1, fn.lastIndexOf("}"));
  }
  function worker(params) {
    var context = params.data[0].context;
    var fn = params.data[0].fn;
    var newFunc = new Function(getFunctionArguments(fn), getFunctionContent(fn));
    postMessage([newFunc.apply(context, params.data[0].args), context]);
  }
  self.onmessage = worker;
  return worker;
}

var workerString = worker.toString();
var code = workerString.substring(workerString.indexOf("{") + 1, workerString.lastIndexOf("return"));
function execute(param) {
  return new Promise(function (resolve, reject) {
    var webWorker = new Worker(URL.createObjectURL(new Blob([code], {
      type: 'text/javascript'
    })));
    webWorker.onmessage = function (result) {
      if (param.context) Object.assign(param.context, result.data[1]);
      resolve(result.data[0]);
    };
    webWorker.onerror = reject;
    var copy = Object.assign({}, param, {
      fn: param.fn.toString()
    });
    webWorker.postMessage([copy]);
  });
}

exports.execute = execute;