roll initiative!

gistfile1.js

function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function roll20() {
  return getRandomInt(1, 20);
}

function getOtherPlayersWithSameRoll(rolls, player) {
  return Object.keys(rolls).filter(
    otherPlayer => otherPlayer !== player && rolls[otherPlayer] === rolls[player]
  )
}

function resolveDuplicateRolls(rolls) {
  for (const player in rolls) {
    const roll = rolls[player];
    const otherPlayersWithTheSameRoll = getOtherPlayersWithSameRoll(rolls, player);

    if (otherPlayersWithTheSameRoll.length > 0) {
      for (const otherPlayer of [player, ...otherPlayersWithTheSameRoll]) {
        rolls[otherPlayer] = roll20();
      }
    }
  }

  const rollValues = Object.values(rolls);
  const duplicatesStillExist = new Set(rollValues).size !== rollValues.length;

  if (duplicatesStillExist) {
    return resolveDuplicateRolls(rolls);
  } else {
    return rolls;
  }
}

function rollInitiative() {
  const rolls = resolveDuplicateRolls({
    spoone: roll20(),
    casus: roll20(),
    phenelope: roll20(),
    ger: roll20(),
    emrick: roll20()
  });
  
  const rankedPlayers = Object.keys(rolls).sort(
    (playerA, playerB) => rolls[playerA] < rolls[playerB] ? 1 : -1
  )

  rankedPlayers.forEach((player, index) => {
    console.log(`${index + 1}: ${player}`)
  })
}