A script that handles incomplete morse signals and gives the original source possibilities

MorseAutocompleteSuggestions.ts

/**
 * Finds the number in an array with the most digits.
 *
 * @param {string} signals - The incomplete source.
 * @returns {string[]} Suggestions of possible complete sources.
*/

const MORSE_DICTIONARY: Record<string, string> = {
  ".": "E",
  "-": "T",
  "..": "I",
  ".-": "A",
  "-.": "N",
  "--": "M",
  "...": "S",
  "..-": "U",
  ".-.": "R",
  ".--": "W",
  "-..": "D",
  "-.-": "K",
  "--.": "G",
  "---": "O"
}

const getPossibillitiesBySignals = (signals: string): string[] => {
  if (signals.indexOf('?') === -1)
    return [signals];
  
  return [
    ...getPossibillitiesBySignals(signals.replace('?', '.')),
    ...getPossibillitiesBySignals(signals.replace('?', '-'))
  ];
}

const charactersPossibilities = (signals: string): string[] => {
  return getPossibillitiesBySignals(signals).map(
    possibility => MORSE_DICTIONARY[possibility]
  );
};

export default charactersPossibilities;