@barchart/common-js/dist/cjs/lang/memoize.js

Library of common JavaScript utilities

var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var memoize_exports = {};
__export(memoize_exports, {
  cache: () => cache,
  simple: () => simple
});
module.exports = __toCommonJS(memoize_exports);
var assert = __toESM(require("./assert.js"));
function simple(fn) {
  const cache2 = {};
  return (x) => {
    if (!Object.prototype.hasOwnProperty.call(cache2, x)) {
      cache2[x] = fn(x);
    }
    return cache2[x];
  };
}
function cache(fn, duration) {
  assert.argumentIsRequired(fn, "fn", Function);
  assert.argumentIsOptional(duration, "duration", Number);
  const durationToUse = duration || 0;
  let executionTime = null;
  let cacheResult = null;
  return () => {
    const currentTime = (/* @__PURE__ */ new Date()).getTime();
    if (executionTime === null || durationToUse > 0 && currentTime > executionTime + durationToUse) {
      executionTime = currentTime;
      cacheResult = fn();
    }
    return cacheResult;
  };
}