Function updateStreak

backend/src/dal/user.ts:1124–1157

(
  uid: string,
  timestamp: number,
)

}

export async function updateStreak(
  uid: string,
  timestamp: number,
): Promise<number> {
  const user = await getPartialUser(uid, "calculate streak", ["streak"]);
  const streak: UserStreak = {
    lastResultTimestamp: user.streak?.lastResultTimestamp ?? 0,
    length: user.streak?.length ?? 0,
    maxLength: user.streak?.maxLength ?? 0,
    hourOffset: user.streak?.hourOffset,
  };

  if (isYesterday(streak.lastResultTimestamp, streak.hourOffset ?? 0)) {
    streak.length += 1;
  } else if (!isToday(streak.lastResultTimestamp, streak.hourOffset ?? 0)) {
    void addImportantLog("streak_lost", streak, uid);
    streak.length = 1;
  }

  if (streak.length > streak.maxLength) {
    streak.maxLength = streak.length;
  }

  streak.lastResultTimestamp = timestamp;

  if (user.streak?.hourOffset === 0) {
    // todo this needs to be removed after a while
    delete streak.hourOffset;
  }

  await getUsersCollection().updateOne({ uid }, { $set: { streak } });

  return streak.length;
}

export async function setStreakHourOffset(
  uid: string,