Rank.js

export const RANKS = {
  FIRST: 1,
  SECOND: 2,
  THIRD: 3,
  FOURTH: 4,
  FIFTH: 5,
  SIXTH: 6,
};

export const PRIZES = {
  [RANKS.FIRST]: 100000000,
  [RANKS.SECOND]: 10000000,
  [RANKS.THIRD]: 1500000,
  [RANKS.FOURTH]: 500000,
  [RANKS.FIFTH]: 5000,
  [RANKS.SIXTH]: 0,
};

export function getRank(matchCount, hasBonus) {
  if (matchCount === 5)
    return { rank: RANKS.FIRST, prize: PRIZES[RANKS.FIRST] };
  if (matchCount === 4 && hasBonus)
    return { rank: RANKS.SECOND, prize: PRIZES[RANKS.SECOND] };
  if (matchCount === 4)
    return { rank: RANKS.THIRD, prize: PRIZES[RANKS.THIRD] };
  if (matchCount === 3)
    return { rank: RANKS.FOURTH, prize: PRIZES[RANKS.FOURTH] };
  if (matchCount === 2)
    return { rank: RANKS.FIFTH, prize: PRIZES[RANKS.FIFTH] };

  return { rank: RANKS.SIXTH, prize: PRIZES[RANKS.FIFTH] };
}