react-timer-hoc/dist/commonjs/timer.js

A React timer higher-order component

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _invariant = require('invariant');

var _invariant2 = _interopRequireDefault(_invariant);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

function checkDelay(delay) {
    (0, _invariant2.default)(typeof delay === 'number' && delay > 0, '[react-timer-hoc] `delay` should be a number greater than 0.');
}

function timer(delay) {
    checkDelay(delay);

    return function TimerHoc(TimedComponent) {
        var Timer = function (_React$Component) {
            _inherits(Timer, _React$Component);

            function Timer(props) {
                _classCallCheck(this, Timer);

                var _this = _possibleConstructorReturn(this, (Timer.__proto__ || Object.getPrototypeOf(Timer)).call(this, props));

                _this.delay = delay;
                _this.state = { tick: 0, timestamp: Date.now() };

                _this.synchronizeWith = props.synchronizeWith;
                _this.synchronized = props.synchronizeWith !== undefined;

                _this.setTimeout = _this.setTimeout.bind(_this);
                _this.stop = _this.stop.bind(_this);
                _this.resume = _this.resume.bind(_this);
                _this.setDelay = _this.setDelay.bind(_this);
                return _this;
            }

            _createClass(Timer, [{
                key: 'setTimeout',
                value: function (_setTimeout) {
                    function setTimeout() {
                        return _setTimeout.apply(this, arguments);
                    }

                    setTimeout.toString = function () {
                        return _setTimeout.toString();
                    };

                    return setTimeout;
                }(function () {
                    var _this2 = this;

                    var delay = this.delay,
                        synchronizeWith = this.synchronizeWith;

                    var duration = delay - Math.abs(synchronizeWith - Date.now()) % delay;

                    this.timer = setTimeout(function () {
                        if (!_this2.stopped) _this2.setTimeout();
                        _this2.setState({
                            tick: _this2.state.tick + 1,
                            timestamp: Date.now()
                        });
                    }, duration);
                })
            }, {
                key: 'start',
                value: function start() {
                    this.stopped = false;
                    if (!this.synchronized) {
                        this.synchronizeWith = Date.now();
                    }
                    this.setTimeout();
                }
            }, {
                key: 'resume',
                value: function resume() {
                    if (this.stopped) {
                        this.start();
                    }
                }
            }, {
                key: 'stop',
                value: function stop() {
                    this.stopped = true;
                    clearTimeout(this.timer);
                }
            }, {
                key: 'setDelay',
                value: function setDelay(delay) {
                    checkDelay(delay);
                    this.delay = delay;
                    if (!this.stopped) {
                        this.stop();
                        this.resume();
                    }
                }
            }, {
                key: 'componentDidMount',
                value: function componentDidMount() {
                    this.start();
                }
            }, {
                key: 'componentWillUnmount',
                value: function componentWillUnmount() {
                    this.stop();
                }
            }, {
                key: 'render',
                value: function render() {
                    var props = this.props,
                        delay = this.delay,
                        stop = this.stop,
                        resume = this.resume,
                        setDelay = this.setDelay;
                    var _state = this.state,
                        tick = _state.tick,
                        timestamp = _state.timestamp;


                    var timer = { delay: delay, tick: tick, timestamp: timestamp, stop: stop, resume: resume, setDelay: setDelay };

                    return _react2.default.createElement(TimedComponent, _extends({}, props, { timer: timer }));
                }
            }]);

            return Timer;
        }(_react2.default.Component);

        Timer.propTypes = {
            synchronizeWith: _propTypes2.default.number
        };

        var componentName = TimedComponent.displayName || TimedComponent.name || 'Component';
        Timer.displayName = 'Timer@' + delay + '[' + componentName + ']';

        return Timer;
    };
}

exports.default = timer;