Method to get shake moves

getShakeMove.js

import throttle from 'throttle';

const totalMoves = [];

let totalShakes = 0;

const mousePos = event => {
  totalMoves.push({
    x: event.clientX,
    y: event.clientY
  });
};

const throttledMousePos = throttle(mousePos, 200);

const testPivot = (list, pivot) => {
  const passed = list.filter(number => {
    const diff = number - pivot;
    return diff > 0 && diff <= 150;
  });
  return passed.length >= 3;
};
const _setShake = () =>
  document.addEventListener('mousemove', throttledMousePos);

const getAllShakes = () => {
  if (totalMoves.length < 4) return 0;
  const pairNumbers = totalMoves.filter((element, idx) => idx % 2 === 0);

  const pivotX =
    pairNumbers.reduce((acc, current) => acc + current.x, 0) /
    pairNumbers.length;
  const pivotY =
    pairNumbers.reduce((acc, current) => acc + current.y, 0) /
    pairNumbers.length;

  const passOnPivotX = testPivot(pairNumbers.map(num => num.x), pivotX);
  const passOnPivotY = testPivot(pairNumbers.map(num => num.y), pivotY);

  if (passOnPivotX && passOnPivotY) {
    totalShakes += 1;
  }
  return totalShakes;
};

const getShake = () =>
  new Promise(resolve =>
    resolve({
      shake_clicks: getAllShakes()
    })
  );

export { _setShake, getShake };