@barchart/common-js/dist/cjs/timing/WindowCounter.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))
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        __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 WindowCounter_exports = {};
__export(WindowCounter_exports, {
  default: () => WindowCounter
});
module.exports = __toCommonJS(WindowCounter_exports);
var assert = __toESM(require("./../lang/assert.js"));
class WindowCounter {
  #duration;
  #windows;
  #maximum;
  #previousCount;
  /**
   * @param {number} duration
   * @param {number} windows
   */
  constructor(duration, windows) {
    assert.argumentIsRequired(duration, "duration", Number);
    assert.argumentIsRequired(windows, "windows", Number);
    this.#duration = duration;
    this.#windows = [new Window(getTime(), this.#duration)];
    this.#maximum = Math.max(windows, 2);
    this.#previousCount = 0;
  }
  /**
   * @public
   * @param {number} count
   */
  increment(count) {
    assert.argumentIsRequired(count, "count", Number);
    this.#advance().increment(count);
  }
  /**
   * @public
   * @returns {number}
   */
  getCurrent() {
    return this.#advance().getCount();
  }
  /**
   * @public
   * @returns {number}
   */
  getPrevious() {
    this.#advance();
    let returnVal;
    if (this.#windows.length > 1) {
      returnVal = this.#windows[1].getCount();
    } else {
      returnVal = 0;
    }
    return returnVal;
  }
  /**
   * @public
   * @returns {number}
   */
  getAverage() {
    const previousWindows = this.#windows.length - 1;
    let returnVal;
    if (previousWindows > 0) {
      returnVal = this.#previousCount / previousWindows;
    } else {
      returnVal = 0;
    }
    return returnVal;
  }
  /**
   * Returns a string representation.
   *
   * @public
   * @returns {string}
   */
  toString() {
    return "[WindowCounter]";
  }
  #advance() {
    const now = getTime();
    while (!this.#windows[0].contains(now)) {
      const previous = this.#windows[0];
      const current = new Window(previous.getEnd(), this.#duration);
      this.#windows.unshift(current);
      this.#previousCount = this.#previousCount + previous.getCount();
      if (this.#windows.length > this.#maximum) {
        const removed = this.#windows.pop();
        this.#previousCount = this.#previousCount - removed.getCount();
      }
    }
    return this.#windows[0];
  }
}
function getTime() {
  return (/* @__PURE__ */ new Date()).getTime();
}
class Window {
  #start;
  #end;
  #count;
  constructor(start, duration) {
    this.#start = start;
    this.#end = start + duration;
    this.#count = 0;
  }
  contains(now) {
    return !(now < this.#start || now > this.#end);
  }
  increment(count) {
    this.#count = this.#count + count;
  }
  getStart() {
    return this.#start;
  }
  getEnd() {
    return this.#end;
  }
  getCount() {
    return this.#count;
  }
}

{
	const cjsExports = module.exports;
	const cjsDefaultExport = cjsExports && cjsExports.__esModule ? cjsExports.default : cjsExports;

	if (cjsDefaultExport && (typeof cjsDefaultExport === 'function' || typeof cjsDefaultExport === 'object')) {
		Object.keys(cjsExports).forEach((key) => {
			if (key !== 'default' && key !== '__esModule') {
				cjsDefaultExport[key] = cjsExports[key];
			}
		});
	}

	module.exports = cjsDefaultExport;
}