device-motion/lib/index.js

A package to work with the device-motion API..

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

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

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

class Seismograph {
  constructor() {
    var {
      minShakes,
      minAmplitude,
      onShake,
      delay
    } = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {
      minShakes: 3,
      minAmplitude: 3,
      onShake: () => "EAAAARTHQUAAAAKEEE!",
      delay: 1500
    };
    (0, _defineProperty2.default)(this, "startRecording", () => {
      if (typeof DeviceMotionEvent.requestPermission === 'function') {
        // iOS 13+
        DeviceMotionEvent.requestPermission().then(response => {
          if (response == 'granted') {
            window.addEventListener("devicemotion", this._onMotionEvent);
          }
        }).catch(console.error);
      } else {
        window.addEventListener("devicemotion", this._onMotionEvent);
      }
    });
    (0, _defineProperty2.default)(this, "stopRecording", () => {
      window.removeEventListener("devicemotion", this._onMotionEvent);
    });
    (0, _defineProperty2.default)(this, "_onMotionEvent", event => {
      var x = null;

      if ("acceleration" in event) {
        x = event.acceleration.x;
      } else {
        x = event.accelerationIncludingGravity.x;
      }

      this._initValues(x);

      this._detectShake(x, this.previousX);
    });
    (0, _defineProperty2.default)(this, "_initValues", x => {
      if (!this.previousX) {
        this.previousX = x;
      }
    });
    (0, _defineProperty2.default)(this, "_detectShake", (current, previous) => {
      if (this._belowTimeThreshold()) {
        return false;
      }

      if (!this._checkAmplitude(current, previous)) {
        return false;
      } else {
        ++this.currentShakes;
      }

      previous = current;

      if (this._shakeThresholdReached()) {
        this.currentShakes = 0;
        this.lastShake = this._currentDate();
        this.onShake();
        return true;
      }

      return false;
    });
    (0, _defineProperty2.default)(this, "_checkAmplitude", (current, previous) => {
      if (Math.sign(current) === Math.sign(previous) || Math.abs(current) < this.minAmplitude) {
        return false;
      }

      return true;
    });
    (0, _defineProperty2.default)(this, "_shakeThresholdReached", () => {
      return this.currentShakes > this.minShakes;
    });
    (0, _defineProperty2.default)(this, "_belowTimeThreshold", () => {
      return this._currentDate() - this.lastShake < this.delay;
    });
    (0, _defineProperty2.default)(this, "_currentDate", () => Date.now());

    if (typeof minShakes === "number" && minShakes > 0) {
      this.minShakes = minShakes;
    } else {
      this.minShakes = 3;
    }

    if (typeof minAmplitude === "number" && minAmplitude > 0) {
      this.minAmplitude = minAmplitude;
    } else {
      this.minAmplitude = 3;
    }

    if (typeof onShake === "function") {
      this.onShake = onShake;
    } else {
      this.onShake = () => "EAAAARTHQUAAAAKEEE!";
    }

    this.delay = delay > 0 ? delay : 1500;
    this.currentShakes = 0;
    this.lastShake = Date.now();
    this.previousX = null;
  }

}

exports.Seismograph = Seismograph;
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