botframework-webchat-component/lib/hooks/internal/useForceRenderAtInterval.js

React component of botframework-webchat

"use strict";

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

var _react = require("react");

var _mathRandom = _interopRequireDefault(require("math-random"));

var _useTimer = _interopRequireDefault(require("./useTimer"));

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

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

// The `nextTimer` function calculates the next absolute time that the timer should be fired based on the origin (original time received), interval, and current time.
// If the origin is t=260, and we are currently at t=1000, nextTimer must return t=60260.
// If the origin is t=260, and we are currently at t=60260 (exact landing), we must return t=120260, not t=60260.
// This is for fixing bug #2103: https://github.com/microsoft/BotFramework-WebChat/issues/2103.
function nextTimer(origin, interval) {
  var time = new Date(origin).getTime();
  var now = Date.now();
  return time > now ? time : now + interval - (now - time) % interval;
}

function useForceRenderAtInterval(origin, interval, fn) {
  var _useState = (0, _react.useState)(nextTimer(origin, interval)),
      _useState2 = _slicedToArray(_useState, 2),
      timer = _useState2[0],
      setTimer = _useState2[1];

  var handler = (0, _react.useCallback)(function () {
    fn && fn(); // Chrome may fire the setTimeout callback 1 ms before its original schedule.
    // Thus, when we calculate the "next" value, it will have the same value as before.
    // Sending the same value to useTimer(), it will not do another schedule because the value did not change.
    // So, we are adding a bit randomness, so useTimer() should pick up the newer scheduled time.

    setTimer(nextTimer(origin, interval) + (0, _mathRandom.default)());
  }, [fn, origin, interval]);
  (0, _useTimer.default)(timer, handler);
  return [timer, setTimer];
}
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