scrabble-solver/packages/solver/src/areDigraphsValid.ts

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

import { type Config, type Pattern } from '@scrabble-solver/types';

export const areDigraphsValid = (config: Config, pattern: Pattern): boolean => {
  const { twoCharacterTiles } = config;
  const { cells } = pattern;

  for (let index = 0; index < cells.length - 1; ++index) {
    const current = cells[index];
    const next = cells[index + 1];
    const digraphCandidate = current.tile.character + next.tile.character;

    if (twoCharacterTiles.includes(digraphCandidate)) {
      return false;
    }
  }

  return true;
};