@barchart/common-js/dist/cjs/collections/sorting/ComparatorBuilder.js

Library of common JavaScript utilities

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var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
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var ComparatorBuilder_exports = {};
__export(ComparatorBuilder_exports, {
  default: () => ComparatorBuilder
});
module.exports = __toCommonJS(ComparatorBuilder_exports);
var assert = __toESM(require("./../../lang/assert.js"));
var comparators = __toESM(require("./comparators.js"));
class ComparatorBuilder {
  #comparator;
  #invert;
  #previous;
  /**
   * @param {Function} comparator - The initial comparator.
   * @param {boolean=} invert - Indicates if the comparator should sort in descending order.
   * @param {ComparatorBuilder=} previous - The previous comparator builder in the chain.
   */
  constructor(comparator, invert, previous) {
    assert.argumentIsRequired(comparator, "comparator", Function);
    assert.argumentIsOptional(invert, "invert", Boolean);
    this.#comparator = comparator;
    this.#invert = invert || false;
    this.#previous = previous || null;
  }
  /**
   * Adds a new comparator to the list of comparators to use.
   *
   * @public
   * @param {Function} comparator - The next comparator function.
   * @param {boolean=} invert - Indicates if the comparator should sort in descending order.
   * @returns {ComparatorBuilder}
   */
  thenBy(comparator, invert) {
    assert.argumentIsRequired(comparator, "comparator", Function);
    assert.argumentIsOptional(invert, "invert", Boolean);
    return new ComparatorBuilder(comparator, invert, this);
  }
  /**
   * Flips the order of the comparator (e.g. ascending to descending).
   *
   * @public
   * @returns {ComparatorBuilder}
   */
  invert() {
    let previous;
    if (this.#previous) {
      previous = this.#previous.invert();
    } else {
      previous = null;
    }
    return new ComparatorBuilder(this.#comparator, !this.#invert, previous);
  }
  /**
   * Returns the comparator function.
   *
   * @public
   * @returns {Function}
   */
  toComparator() {
    let previousComparator;
    if (this.#previous) {
      previousComparator = this.#previous.toComparator();
    } else {
      previousComparator = comparators.empty;
    }
    return (a, b) => {
      let result = previousComparator(a, b);
      if (result === 0) {
        let sortA;
        let sortB;
        if (this.#invert) {
          sortA = b;
          sortB = a;
        } else {
          sortA = a;
          sortB = b;
        }
        result = this.#comparator(sortA, sortB);
      }
      return result;
    };
  }
  /**
   * Returns a string representation.
   *
   * @public
   * @returns {string}
   */
  toString() {
    return "[ComparatorBuilder]";
  }
  /**
   * Creates a {@link ComparatorBuilder}, given an initial comparator function.
   *
   * @public
   * @static
   * @param {Function} comparator - The initial comparator.
   * @param {boolean=} invert - Indicates if the comparator should sort in descending order.
   * @returns {ComparatorBuilder}
   */
  static startWith(comparator, invert) {
    return new ComparatorBuilder(comparator, invert);
  }
}

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

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			if (key !== 'default' && key !== '__esModule') {
				cjsDefaultExport[key] = cjsExports[key];
			}
		});
	}

	module.exports = cjsDefaultExport;
}