JS snippet to redraw GitHub contribution graph into DTEK power schedule

github-contribution-graph-into-dtek.js

function convertToPeriodicValue(value, periodLength) {
  let modValue = value % periodLength;
  if (modValue < 4) {
    return 0;
  } else if (modValue >= 4 && modValue < 7) {
    return 1;
  } else if (modValue >= 7 && modValue < 9) {
    return 4;
  }
}
  
document.querySelectorAll("td.ContributionCalendar-day").forEach((e, i) => e.setAttribute("data-level", convertToPeriodicValue(i, 9)));