function getSegmentGranularity()

in src/main.js [3005:3039]

• 31 lines of code
• 17 McCabe index (conditional complexity)

  function getSegmentGranularity(min_date, max_date) {
    if (min_date === undefined || max_date === undefined) {
      return "";
    }

    var timeline_range,  // limit the number of facets to less than 20, rounding up / down to nearest natural temporal boundary
      days_to_years; // flag for transitioning to granularities of years or longer

    if (globals.date_granularity === "days") {
      timeline_range = time.day.count(time.day.floor(min_date), time.day.floor(max_date));

      if (timeline_range <= 7) {
        return "days";
      } else if (timeline_range > 7 && timeline_range <= 42) {
        return "weeks";
      } else if (timeline_range > 42 && timeline_range <= 732) {
        return "months";
      }
      days_to_years = true;
    }
    if (globals.date_granularity === "years" || days_to_years) {
      timeline_range = max_date.getUTCFullYear() - min_date.getUTCFullYear();

      if (timeline_range <= 10) {
        return "years";
      } else if (timeline_range > 10 && timeline_range <= 100) {
        return "decades";
      } else if (timeline_range > 100 && timeline_range <= 1000) {
        return "centuries";
      }
      return "millenia";
    } else if (globals.date_granularity === "epochs") {
      return "epochs";
    }
  }