scrabble-solver/packages/dictionaries/src/lib/createCacheTimestampComparator.ts

Scrabble Solver 2 - Free, open-source, cross-platform, multi-language analysis tool for Scrabble, Scrabble Duel, Super Scrabble, Letter League, Literaki, and Kelimelik. Quickly find the top-scoring words using the given board and tiles.

import { Trie } from '@kamilmielnik/trie';
import { Locale } from '@scrabble-solver/types';

import { Cache } from '../types';

export const createCacheTimestampComparator = (locale: Locale) => {
  return (a: Cache<Locale, Trie>, b: Cache<Locale, Trie>): number => {
    const aTimestamp = a.getLastModifiedTimestamp(locale);
    const bTimestamp = b.getLastModifiedTimestamp(locale);

    if (aTimestamp === bTimestamp) {
      return 0;
    }

    if (typeof aTimestamp === 'undefined') {
      return 1;
    }

    if (typeof bTimestamp === 'undefined') {
      return -1;
    }

    return bTimestamp - aTimestamp;
  };
};