Discover your longest StackOverflow/StackExchange login streak

stackexchange-max-login-streak.js

/*! stackexchange-max-login-streak.js | Samuel Jones 2022 | MIT License | gist.github.com/samthecodingman */

/*
 * == USAGE ==
 * 1. Review and vet the below code
 * 2. Open your profile page on the relevant SE site (e.g. https://stackoverflow.com/users/3068190/samthecodingman)
 * 3. Open your Browser's JavaScript console (usually Ctrl+Shift+J or F12)
 * 4. Paste and execute this helper script
 * 5. Take note of the stats logged to the console
 */

if (typeof visited === 'undefined') {
  // if visited isn't present: open, load, and close the daily access calendar widget
  const btnDailyAccessCal = document.querySelector(".js-daily-access-calendar-toggle");
  btnDailyAccessCal.click();
  await new Promise(res => setTimeout(res, 1000));
  btnDailyAccessCal.click();
}

// init vars
let vistedDates = [],
  currentStreakDays = 0,
  maxStreakDays = 0,
  currentStreakStartDateStr = null,
  checkDateStr = null,
  nextDateStr = null,
  maxStreakDetails = null;

// parse global "visited" object into ordered array of dates "vistedDates"
for (let yearStr in visited) {
  for (let monthStr in visited[yearStr]) {
    for (let dayStr in visited[yearStr][monthStr]) {
      if (visited[yearStr][monthStr][dayStr]) {
        vistedDates.push(`${yearStr}-${("0" + monthStr).slice(-2)}-${("0" + dayStr).slice(-2)}`);
      }
    }
  }
}

// for each date, check if a streak occurred
for (let dateStr of vistedDates) {
  checkDateStr = nextDateStr;
  nextDateStr = new Date((new Date(dateStr)).getTime() + 86410000).toISOString().slice(0,10); // gets YYYY-MM-DD of the day after dateStr

  // current streak continues?
  if (checkDateStr === dateStr) {
    currentStreakDays++;
    continue;
  }

  // streak was broken. Was this streak the best so far?
  if (currentStreakDays > maxStreakDays) {
    maxStreakDetails = {
      startDateStr: currentStreakStartDateStr,
      endDateStr: new Date((new Date(checkDateStr)).getTime() - 3600000).toISOString().slice(0,10), // gets YYYY-MM-DD of the day before checkDateStr
      days: currentStreakDays
    }
    maxStreakDays = currentStreakDays
  }
  
  // reset tracked streak
  currentStreakDays = 1;
  currentStreakStartDateStr = dateStr;
}

// output results
console.log([
  "You have logged in on " + vistedDates.length + " different days, with a current streak of " + currentStreakDays + " days (starting on " + currentStreakStartDateStr + " UTC)",
  maxStreakDetails
    ? "Your best login streak was " + maxStreakDetails.days + " days (" + (maxStreakDetails.days == 1 ? "first on " + maxStreakDetails.startDateStr : maxStreakDetails.startDateStr + " to " + maxStreakDetails.endDateStr) + " UTC)."
    : "You are currently on your best login streak."
].join("\n"));