decorator-synchronized/dist/index.js

function decorator which ensures that calls do not run simultaneously

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.synchronized = void 0;

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(source, true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(source).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var toDecorator = function toDecorator(wrapFn) {
  var wrapMd = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : wrapFn;
  return function () {
    var wrapFn_ = wrapFn.apply(void 0, arguments);
    var wrapMd_ = wrapMd.apply(void 0, arguments);
    return function (target, key, descriptor) {
      return key === undefined ? wrapFn_(target) : _objectSpread({}, descriptor, {
        value: (typeof target === "function" ? wrapFn_ : wrapMd_)(descriptor.value)
      });
    };
  };
};

var synchronized = toDecorator(function () {
  var queue = Promise.resolve();
  return function (fn) {
    return function () {
      var _this = this,
          _arguments = arguments;

      var makeCall = function makeCall() {
        return fn.apply(_this, _arguments);
      };

      return queue = queue.then(makeCall, makeCall);
    };
  };
}, function () {
  var queues = new WeakMap();
  return function (method) {
    return function () {
      var _this2 = this,
          _arguments2 = arguments;

      var makeCall = function makeCall() {
        return method.apply(_this2, _arguments2);
      };

      var queue = queues.get(this);
      queues.set(this, queue = queue === undefined ? makeCall() : queue.then(makeCall, makeCall));
      return queue;
    };
  };
});
exports.synchronized = synchronized;

var DEFAULT_KEY_FUNCTION = function DEFAULT_KEY_FUNCTION(arg) {
  return arg;
};

synchronized.withKey = toDecorator(function () {
  var keyFunction = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_KEY_FUNCTION;
  var queues = new Map();
  return function (fn) {
    return function () {
      var _this3 = this,
          _arguments3 = arguments;

      var key = keyFunction.apply(this, arguments);

      var makeCall = function makeCall() {
        return fn.apply(_this3, _arguments3);
      };

      var queue = queues.get(key);
      queues.set(key, queue = queue === undefined ? makeCall() : queue.then(makeCall, makeCall));

      var clean = function clean() {
        if (queues.get(key) === queue) {
          queues.delete(key);
        }
      };

      queue.then(clean, clean);
      return queue;
    };
  };
}, function () {
  var keyFunction = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_KEY_FUNCTION;
  var instancesQueues = new WeakMap();
  return function (method) {
    return function () {
      var _this4 = this,
          _arguments4 = arguments;

      var key = keyFunction.apply(this, arguments);
      var queues = instancesQueues.get(this);

      if (queues === undefined) {
        instancesQueues.set(this, queues = new Map());
      }

      var makeCall = function makeCall() {
        return method.apply(_this4, _arguments4);
      };

      var queue = queues.get(key);
      queues.set(key, queue = queue === undefined ? makeCall() : queue.then(makeCall, makeCall));

      var clean = function clean() {
        if (queues.get(key) === queue) {
          queues.delete(key);
        }
      };

      queue.then(clean, clean);
      return queue;
    };
  };
});
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