maycur-business/lib/utils/formula/formularFunction/interpolator.js

maycur business react components of web

"use strict";

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

var _isdate = _interopRequireDefault(require("./isdate"));

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

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

// Functor to create a function that runs the percentage between two values;
// Usage: interpolator(0, 100)(0.5) == 50
// Credit: https://github.com/sveltejs/svelte/blob/master/src/motion/tweened.ts
function interpolator(a, b) {
  if (a === b || a !== a) return function () {
    return a;
  };

  var type = _typeof(a);

  if (type !== _typeof(b) || Array.isArray(a) !== Array.isArray(b)) {
    throw new Error("Cannot interpolate values of different type");
  }

  if (Array.isArray(a)) {
    var arr = b.map(function (bi, i) {
      return interpolator(a[i], bi);
    });
    return function (t) {
      return arr.map(function (fn) {
        return fn(t);
      });
    };
  }

  if (type === "object") {
    if (!a || !b) throw new Error("Object cannot be null");

    if ((0, _isdate["default"])(a) && (0, _isdate["default"])(b)) {
      a = a.getTime();
      b = b.getTime();
      var delta = b - a;
      return function (t) {
        return new Date(a + t * delta);
      };
    }

    var keys = Object.keys(b);
    var interpolators = {};
    keys.forEach(function (key) {
      interpolators[key] = interpolator(a[key], b[key]);
    });
    return function (t) {
      var result = {};
      keys.forEach(function (key) {
        result[key] = interpolators[key](t);
      });
      return result;
    };
  }

  if (type === "number") {
    var _delta = b - a;

    return function (t) {
      return a + t * _delta;
    };
  }

  throw new Error("Cannot interpolate ".concat(type, " values"));
}