function generateDutyCycle()

in index.js [202:232]

• 28 lines of code
• 5 McCabe index (conditional complexity)

function generateDutyCycle({ dutyCycleHistory, triagers, components }) {
  let { lastDutyDate, lastTriagePair } = getLastDutyCycle({ dutyCycleHistory })
  let lastTriagerIdx = -1;
  const triagerNames = Object.keys(triagers);
  const componentNames = Object.keys(components);

  if (!lastDutyDate || !Array.isArray(lastTriagePair) || lastTriagePair.length !== 2) {
    console.warn('No existing duty cycle history. Generating first cycle.');
    lastDutyDate = createDateString(getLastMonday(new Date()));
  } else {
    lastTriagerIdx = triagerNames.indexOf(lastTriagePair[1]);
    if (lastTriagerIdx === -1) {
      console.warn(`Unable to find triager named ${lastTriagePair[1]} in config. Starting over from first triager.`);
    }
  }

  const nextTriagerIdx = (lastTriagerIdx + 1) % triagerNames.length;
  const nextDutyDateMS = new Date(lastDutyDate).getTime() + CYCLE_LENGTH_MS;
  const nextTriagePair = [triagerNames[nextTriagerIdx], triagerNames[(nextTriagerIdx +1 ) % triagerNames.length]];
  const nextDutyDate = createDateString(new Date(nextDutyDateMS));
  const firstComponentSet = selectRandom(componentNames, Math.floor(componentNames.length / 2));
  const secondComponentSet = componentNames.filter(c => firstComponentSet.indexOf(c) === -1);
  const dutyCycle = {};
  dutyCycle[nextTriagePair[0]] = firstComponentSet;
  dutyCycle[nextTriagePair[1]] = secondComponentSet;

  return {
    date: nextDutyDate,
    dutyCycle
  };
}