Code.gs

// Google Calendar Synchronization, build on 2025-08-23
// Source: https://github.com/scriptPilot/google-calendar-synchronization

function start() {
  // Check onStart function
  if (typeof onStart !== "function") {
    throw new Error(
      "onStart() function is missing - please check the documentation",
    );
  }

  // Set the script invocation check to true
  onStart.calledByStartFunction = true;

  // Set default values
  setSyncInterval();
  setMaxExecutionTime();

  // Create or update the fallback trigger based on the max execution time (fallback if script is exeeding Google Script limits)
  createTrigger("startFallback", onStart.maxExecutionTime);

  // Remove any stop note from previous stop() call
  PropertiesService.getUserProperties().deleteProperty("stopNote");

  // Wrap the sync to catch any error and ensure the next trigger creation
  try {
    // Run the onStart function
    onStart();
  } catch (err) {
    Logger.log("An error occured during the synchronization");
    Logger.log(`Message: ${err.message}`);
  }

  // Check stop note (if stop() was called during the script run)
  if (PropertiesService.getUserProperties().getProperty("stopNote") !== null) {
    Logger.log(`Synchronization stopped.`);
    return;
  }

  // Create a trigger based on the sync interval
  createTrigger("start", onStart.syncInterval);

  // Update the fallback trigger
  // sync interval + 1 minute to allow fallback trigger update on the next regular script run
  createTrigger("startFallback", onStart.syncInterval + 1);
}

function stop() {
  // Remove all existing triggers
  deleteTrigger("start");
  deleteTrigger("startFallback");

  // Set a stop note (to stop any running script to create a new trigger)
  PropertiesService.getUserProperties().setProperty("stopNote", true);

  // Log script stop
  Logger.log(`The synchronization will not run again`);
  Logger.log(`If the script is currently running, it will complete`);
  Logger.log(`You might want to delete all synchronized events with clean()`);
}

function clean() {
  // Log start
  Logger.log(`Cleanup started`);
  // Get saved sync pairs
  const syncPairs =
    PropertiesService.getUserProperties()
      .getProperty("syncPairs")
      ?.split(";") || [];

  // Loop sync pairs
  let totalExistingTargetEvents = 0;
  syncPairs.forEach((syncPair) => {
    // Extract calendar ids
    [sourceCalendarId, targetCalendarId] = syncPair.split(":");

    // Get relevant target events
    const existingTargetEvents = getEvents({
      calendarId: targetCalendarId,
      sourceCalendarId: sourceCalendarId,
    });

    // Delete relevant target events
    deleteEvents(targetCalendarId, existingTargetEvents);

    // Sum-up target event count
    totalExistingTargetEvents =
      totalExistingTargetEvents + existingTargetEvents.length;
  });

  // Reset sync pairs property
  // - not all properties are deleted to keep script stop notice
  PropertiesService.getUserProperties().deleteProperty("syncPairs");

  // Log completion
  Logger.log(
    `${totalExistingTargetEvents} obsolete target event${totalExistingTargetEvents !== 1 ? "s" : ""} deleted`,
  );
  Logger.log("Cleanup completed");
  Logger.log("You can now remove the Google Apps Script project");
}

function sync(
  sourceCalendarName,
  targetCalendarName,
  pastDays = 7,
  nextDays = 28,
  correction = (targetEvent) => targetEvent,
) {
  // Check script invocation
  if (!onStart.calledByStartFunction) {
    throw new Error(
      "Please select the Code.gs file and run the start() script.",
    );
  }

  // Check options
  if (!sourceCalendarName) throw new Error("sourceCalendarName is missing");
  if (!targetCalendarName) throw new Error("targetCalendarName is missing");

  // Log start
  Logger.log(
    `Synchronization started from "${sourceCalendarName}" to "${targetCalendarName}"`,
  );

  // Get calendar details
  const sourceCalendar = getCalendar({ calendarName: sourceCalendarName });
  const targetCalendar = getCalendar({ calendarName: targetCalendarName });

  // Remember sync pair for later cleanup
  const syncPair = `${sourceCalendar.id}:${targetCalendar.id}`;
  const syncPairs =
    PropertiesService.getUserProperties()
      .getProperty("syncPairs")
      ?.split(";") || [];
  if (!syncPairs.includes(syncPair)) syncPairs.push(syncPair);
  PropertiesService.getUserProperties().setProperty(
    "syncPairs",
    syncPairs.join(";"),
  );

  // Calculate timeframe
  const { dateMin, dateMax } = createTimeframe(pastDays, nextDays);

  // Get source events
  let sourceEvents = getEvents({
    calendarId: sourceCalendar.id,
    dateMin,
    dateMax,
  });
  sourceEvents = correctExdates(sourceEvents, sourceCalendar.timeZone);
  sourceEvents = cutEventsSeries(
    sourceEvents,
    dateMin,
    dateMax,
    sourceCalendar.timeZone,
  );
  sourceEvents = cutSingleEvents(sourceEvents, dateMin, dateMax);
  Logger.log(
    `${sourceEvents.length} source event${sourceEvents.length !== 1 ? "s" : ""} found between ${createLocalDateStr(dateMin)} and ${createLocalDateStr(dateMax)}`,
  );

  // Get existing target events
  let existingTargetEvents = getEvents({
    calendarId: targetCalendar.id,
    sourceCalendarId: sourceCalendar.id,
  });
  existingTargetEvents = correctExdates(
    existingTargetEvents,
    targetCalendar.timeZone,
  );

  // Create target events
  const targetEvents = sourceEvents
    .map((sourceEvent) => {
      let targetEvent = createTargetEvent({ sourceEvent, sourceCalendar });
      targetEvent = correction(targetEvent, sourceEvent);
      targetEvent = correctUndefinedProps(targetEvent);
      return targetEvent;
    })
    .filter((e) => e.status !== "cancelled");

  // Calculate obsolete existing target events
  const obsoleteExistingTargetEvents = [];
  existingTargetEvents.forEach((existingTargetEvent) => {
    const targetEventFound = targetEvents.filter((e) =>
      isEventEqual(e, existingTargetEvent),
    ).length;
    const duplicatedExistingTargetEventFound = existingTargetEvents.filter(
      (e) =>
        isEventEqual(e, existingTargetEvent) && e.id < existingTargetEvent.id,
    ).length;
    if (!targetEventFound || duplicatedExistingTargetEventFound)
      obsoleteExistingTargetEvents.push(existingTargetEvent);
  });

  // Calculate missing target events
  const missingTargetEvents = targetEvents.filter((targetEvent) => {
    return !existingTargetEvents.filter((e) => isEventEqual(e, targetEvent))
      .length;
  });

  // Remove obsolete existing target events
  deleteEvents(targetCalendar.id, obsoleteExistingTargetEvents);

  // Create missing target events
  missingTargetEvents.forEach((targetEvent) => {
    Calendar.Events.insert(targetEvent, targetCalendar.id);
    Logger.log(
      `Created event "${targetEvent.summary || "(no title)"}" at ${createLocalDateStr(targetEvent.start)}`,
    );
  });

  // Log completion
  Logger.log(
    `${obsoleteExistingTargetEvents.length} obsolete target event${obsoleteExistingTargetEvents.length !== 1 ? "s" : ""} deleted`,
  );
  Logger.log(
    `${missingTargetEvents.length} missing target event${missingTargetEvents.length !== 1 ? "s" : ""} created`,
  );
  Logger.log("Synchronization completed");
}

function pastDays(dateTime) {
  const duration = DateTimeInterval.fromDateTimes(dateTime, DateTime.now());
  return Math.floor(duration.length("days"));
}

function nextDays(dateTime) {
  const duration = DateTimeInterval.fromDateTimes(DateTime.now(), dateTime);
  return Math.floor(duration.length("days"));
}

function startOfWeek(offset = 0) {
  return pastDays(DateTime.now().startOf("week").minus({ weeks: offset }));
}

function endOfWeek(offset = 0) {
  return nextDays(DateTime.now().endOf("week").plus({ weeks: offset }));
}

function startOfMonth(offset = 0) {
  return pastDays(DateTime.now().startOf("month").minus({ months: offset }));
}

function endOfMonth(offset = 0) {
  return nextDays(
    DateTime.now().startOf("month").plus({ months: offset }).endOf("month"),
  );
}

function startOfQuarter(offset = 0) {
  const now = DateTime.now();
  const monthsToStartOfQuarter = (now.month - 1) % 3;
  return pastDays(
    now
      .startOf("month")
      .minus({ months: monthsToStartOfQuarter })
      .minus({ months: offset * 3 }),
  );
}

function endOfQuarter(offset = 0) {
  const now = DateTime.now();
  const monthsToEndOfQuarter = Math.ceil(now.month / 3) * 3 - now.month;
  return nextDays(
    now
      .startOf("month")
      .plus({ months: monthsToEndOfQuarter })
      .plus({ months: offset * 3 })
      .endOf("month"),
  );
}

function startOfHalfyear(offset = 0) {
  const now = DateTime.now();
  const monthsToStartOfHalfyear = (now.month - 1) % 6;
  return pastDays(
    now
      .startOf("month")
      .minus({ months: monthsToStartOfHalfyear })
      .minus({ months: offset * 6 }),
  );
}

function endOfHalfyear(offset = 0) {
  const now = DateTime.now();
  const monthsToEndOfHalfyear = Math.ceil(now.month / 6) * 6 - now.month;
  return nextDays(
    now
      .startOf("month")
      .plus({ months: monthsToEndOfHalfyear })
      .plus({ months: offset * 6 })
      .endOf("month"),
  );
}

function startOfYear(offset = 0) {
  return nextDays(DateTime.now().startOf("year").plus({ years: offset }));
}

function endOfYear(offset = 0) {
  return nextDays(
    DateTime.now().startOf("year").plus({ years: offset }).endOf("year"),
  );
}

function isSynchronizedEvent(event) {
  return event.extendedProperties?.private?.sourceCalendarId !== undefined;
}

function isRecurringEvent(event) {
  return event.recurrence || event.recurringEventId;
}

function isOOOEvent(event) {
  return event.eventType === "outOfOffice";
}

function isAlldayEvent(event) {
  const start = new Date(event.start.dateTime || event.start.date);
  const end = new Date(event.end.dateTime || event.end.date);
  return (end - start) % (24 * 60 * 60 * 1000) === 0;
}

function isOnWeekend(event) {
  const startDate = new Date(event.start.dateTime || event.start.date);
  return startDate.getDay() === 6 || startDate.getDay() === 0;
}

function isBusyEvent(event) {
  return event.transparency !== "transparent" && !isOOOEvent(event);
}

function isOpenByMe(event) {
  return (
    event.attendees?.filter(
      (attendee) => attendee.email === Session.getEffectiveUser().getEmail(),
    )[0]?.responseStatus === "needsAction"
  );
}

function isAcceptedByMe(event) {
  return (
    event.attendees?.filter(
      (attendee) => attendee.email === Session.getEffectiveUser().getEmail(),
    )[0]?.responseStatus === "accepted"
  );
}

function isTentativeByMe(event) {
  return (
    event.attendees?.filter(
      (attendee) => attendee.email === Session.getEffectiveUser().getEmail(),
    )[0]?.responseStatus === "tentative"
  );
}

function isDeclinedByMe(event) {
  return (
    event.attendees?.filter(
      (attendee) => attendee.email === Session.getEffectiveUser().getEmail(),
    )[0]?.responseStatus === "declined"
  );
}

function setMaxExecutionTime(minutes = 6) {
  // Check script invocation
  if (!onStart.calledByStartFunction) {
    throw new Error(
      "Please select the Code.gs file and run the start() script.",
    );
  }
  // Set the new max execution time
  onStart.maxExecutionTime = minutes;
}

function setSyncInterval(minutes = 1) {
  // Check script invocation
  if (!onStart.calledByStartFunction) {
    throw new Error(
      "Please select the Code.gs file and run the start() script.",
    );
  }
  // Set the new sync interval
  onStart.syncInterval = minutes;
}

// Correction for retrieved Google Calendar events
// - add cancelled instances as exdate to the main event
// - remove cancelled instances from the events array

function correctExdates(events, calendarTimeZone) {
  // Add missing exdates
  events = events.map((event) => {
    // Return any non-event-series unchanged
    if (!event.recurrence) return event;

    // Create array with exdates; keep existing ones
    const existingExdates = event.recurrence.filter(
      (r) => r.substr(0, 6) === "EXDATE",
    )[0];
    const exdates = existingExdates
      ? existingExdates.split(":")[1].split(",")
      : [];

    // Filter events for instances of this event series
    const instances = events.filter((e) => e.recurringEventId === event.id);

    // Add instances to the exdates array
    instances.forEach((instance) => {
      const instanceExdate = DateTime.fromISO(
        instance.originalStartTime.dateTime || instance.originalStartTime.date,
        { zone: instance.originalStartTime.timeZone || calendarTimeZone },
      );
      exdates.push(
        instance.originalStartTime.dateTime
          ? instanceExdate.toFormat("yMMdd'T'HHmmss")
          : instanceExdate.toFormat("yMMdd"),
      );
    });

    // Add exdates to the event
    if (exdates.length) {
      event.recurrence = event.recurrence.filter(
        (r) => r.substr(0, 6) !== "EXDATE",
      );
      event.recurrence.push(`EXDATE:${exdates.sort().join(",")}`);
    }

    // Return the event
    return event;
  });

  // Remove cancelled instances (listed in exdates)
  events = events.filter(
    (e) => !(e.recurringEventId && e.status === "cancelled"),
  );

  // Return corrected events
  return events;
}

function correctUndefinedProps(event) {
  // Remove undefined props
  Object.keys(event).forEach((key) => {
    if (event[key] === undefined) delete event[key];
  });
  // Return event
  return event;
}

function createBareEvent(event) {
  const {
    conferenceData,
    created,
    creator,
    etag,
    eventType,
    hangoutLink,
    htmlLink,
    iCalUID,
    id,
    kind,
    organizer,
    recurringEventId,
    reminders,
    sequence,
    status,
    updated,
    ...cleanEvent
  } = event;
  return cleanEvent;
}

function createLocalDateStr(dateTime) {
  // Create the date object
  let date;
  if (dateTime instanceof Date) date = new Date(dateTime.getTime());
  else if (typeof dateTime === "string") date = new Date(dateTime);
  else date = new Date(dateTime.dateTime || dateTime.date);
  // Format the date and time components
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, "0");
  const day = String(date.getDate()).padStart(2, "0");
  const hours = String(date.getHours()).padStart(2, "0");
  const minutes = String(date.getMinutes()).padStart(2, "0");
  const seconds = String(date.getSeconds()).padStart(2, "0");
  // Combine the components into the desired format
  const formattedDateStr = `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
  // Return formatted date string
  return formattedDateStr;
}

function createSortedEvent(obj) {
  if (Array.isArray(obj)) return obj.sort();
  if (typeof obj === "object" && obj !== null) {
    const sortedObj = {};
    const sortedKeys = Object.keys(obj).sort();
    sortedKeys.forEach((key) => {
      // Harmonize dateTime string
      if (key === "dateTime") {
        sortedObj[key] = new Date(obj[key]).toISOString();
        // Sort recurrence elements properly
      } else if (key === "recurrence") {
        sortedObj[key] = obj[key].map((el) => {
          let [elKey, elValue] = el.split(":");
          elValue = elValue.split(";").sort().join(";");
          return [elKey, elValue].join(":");
        });
        // Any other property
      } else {
        sortedObj[key] = createSortedEvent(obj[key]);
      }
    });
    return sortedObj;
  }
  return obj;
}

function createTargetEvent({ sourceEvent, sourceCalendar }) {
  // Create target event
  const targetEvent = {};

  // Keep only time-based properties to avoid any unwanted data exposure
  const defaultProps = ["start", "end", "recurrence"];
  defaultProps.forEach((prop) => {
    if (sourceEvent[prop] !== undefined) targetEvent[prop] = sourceEvent[prop];
  });

  // Use default summary
  const defaultSummary = "Busy";
  if (!defaultProps.includes("summary")) targetEvent.summary = defaultSummary;

  // Add source calendar id and source event id
  targetEvent.extendedProperties = {
    private: {
      sourceCalendarId: sourceCalendar.id,
      sourceEventId: sourceEvent.id,
    },
  };

  // Return target event
  return targetEvent;
}

function createTimeframe(pastDays, nextDays) {
  // Calculate timeframe
  const today = new Date();
  const todayMorning = new Date(
    today.getFullYear(),
    today.getMonth(),
    today.getDate(),
  );
  const dateMin = new Date(
    todayMorning.getTime() - pastDays * 24 * 60 * 60 * 1000,
  );
  const dateMax = new Date(
    todayMorning.getTime() + (nextDays + 1) * 24 * 60 * 60 * 1000,
  );
  return { dateMin, dateMax };
}

function createTrigger(functionName, minutes) {
  if (functionName === "startFallback") {
    // Ceil to next valid interval (1, 5, 10, 15 or 30)
    minutes =
      minutes >= 30
        ? minutes
        : minutes > 15
          ? 30
          : minutes > 10
            ? 15
            : minutes > 5
              ? 10
              : 5;

    let newTrigger = null;
    if (minutes <= 30) {
      newTrigger = ScriptApp.newTrigger(functionName)
        .timeBased()
        .everyMinutes(minutes)
        .create();
    } else {
      newTrigger = ScriptApp.newTrigger(functionName)
        .timeBased()
        .everyHours(1)
        .create();
    }
    deleteTrigger(functionName, newTrigger.getUniqueId());
  } else {
    deleteTrigger(functionName);
    ScriptApp.newTrigger(functionName)
      .timeBased()
      .after(minutes * 60 * 1000)
      .create();
  }
  Logger.log(
    `Trigger created for the ${functionName}() function ${functionName === "startFallback" ? "every" : "in"} ${minutes} minute${minutes !== 1 ? "s" : ""}`,
  );
}

// Cut event series according to the specified timerange

function cutEventsSeries(events, dateMin, dateMax, calendarTimeZone) {
  return events
    .map((event) => {
      if (event.recurrence) {
        // Create rule object (including DTSTART, RRULE and EXDATE)
        const eventStartTimeZone = event.start.timeZone || calendarTimeZone;
        const eventStart = DateTime.fromISO(
          event.start.dateTime || event.start.date,
          { zone: eventStartTimeZone },
        );
        const rrule = RRuleStr(
          `DTSTART:${eventStart.toFormat("yMMdd'T'HHmmss")}\n${event.recurrence.join("\n")}`,
        );

        // Get instances
        const correctedDateMin = DateTime.fromJSDate(dateMin).toJSDate();
        const correctedDateMax = DateTime.fromJSDate(dateMax)
          .minus({ seconds: 1 })
          .toJSDate();
        const instances = rrule
          .between(correctedDateMin, correctedDateMax, true)
          .map((i) =>
            DateTime.fromJSDate(i)
              .toUTC()
              .setZone(eventStartTimeZone, { keepLocalTime: true })
              .toJSDate(),
          );

        // No valid instances
        const exdates =
          typeof rrule.exdates === "function"
            ? rrule.exdates().map((exdate) => exdate.toISOString())
            : [];
        const instancesWithoutExdates = instances.filter(
          (instance) => !exdates.includes(instance.toISOString()),
        );
        if (!instancesWithoutExdates.length)
          return { ...event, status: "cancelled" };

        // Update start date
        const newEventStart = DateTime.fromJSDate(instances[0]);
        event.start = {
          ...event.start,
          ...(event.start.dateTime
            ? { dateTime: newEventStart.toISO() }
            : { date: newEventStart.toISODate() }),
        };

        // Update end date
        const eventEndTimeZone = event.end.timeZone || calendarTimeZone;
        const eventEnd = DateTime.fromISO(
          event.end.dateTime || event.end.date,
          { zone: eventEndTimeZone },
        );
        const eventDuration = eventEnd - eventStart;
        const newEventEnd = newEventStart.plus({
          seconds: eventDuration / 1000,
        });
        event.end = {
          ...event.end,
          ...(event.end.dateTime
            ? { dateTime: newEventEnd.toISO() }
            : { date: newEventEnd.toISODate() }),
        };

        // Remove COUNT, update UNTIL
        const lastInstanceEndOfDay = DateTime.fromJSDate(
          instances.slice(-1)[0],
        ).endOf("day");
        const timeframeEndDate = DateTime.fromJSDate(dateMax);
        const newUntilDate = DateTime.min(
          lastInstanceEndOfDay,
          timeframeEndDate,
        );
        event.recurrence = event.recurrence.map((arrEl) => {
          if (arrEl.substr(0, 6) === "RRULE:") {
            let [rulePrefix, ruleStr] = arrEl.split(":");
            let ruleStrParts = ruleStr.split(";");
            ruleStrParts = ruleStrParts.filter(
              (rsp) => rsp.substr(0, 6) !== "COUNT=",
            );
            ruleStrParts = ruleStrParts.filter(
              (rsp) => rsp.substr(0, 6) !== "UNTIL=",
            );
            ruleStrParts.push(
              `UNTIL=${newUntilDate.toUTC().toFormat("yMMdd'T'HHmmss'Z'")}`,
            );
            ruleStr = ruleStrParts.join(";");
            return [rulePrefix, ruleStr].join(":");
          } else {
            return arrEl;
          }
        });
      }
      return event;
    })
    .filter((e) => e.status !== "cancelled");
}

// Cut single events according to the specified timeframe

function cutSingleEvents(events, dateMin, dateMax) {
  const dateTimeMin = DateTime.fromJSDate(dateMin);
  const dateTimeMax = DateTime.fromJSDate(dateMax);
  return events
    .map((event) => {
      if (!event.recurrence) {
        let dateTimeStart = DateTime.fromISO(
          event.start.dateTime || event.start.date,
        );
        let dateTimeEnd = DateTime.fromISO(
          event.end.dateTime || event.end.date,
        );
        if (dateTimeStart < dateTimeMin) dateTimeStart = dateTimeMin;
        if (dateTimeEnd > dateTimeMax) dateTimeEnd = dateTimeMax;
        if (dateTimeEnd <= dateTimeStart)
          return { ...event, status: "cancelled" };
        return {
          ...event,
          start: {
            ...event.start,
            ...(event.start.dateTime
              ? { dateTime: dateTimeStart.toISO() }
              : { date: dateTimeStart.toISODate() }),
          },
          end: {
            ...event.end,
            ...(event.end.dateTime
              ? { dateTime: dateTimeEnd.toISO() }
              : { date: dateTimeEnd.toISODate() }),
          },
        };
      }
      return event;
    })
    .filter((e) => e.status !== "cancelled");
}

function deleteEvents(calendarId, events) {
  events.forEach((event) => {
    Calendar.Events.remove(calendarId, event.id);
    Logger.log(
      `Deleted event "${event.summary || "(no title)"}" at ${createLocalDateStr(event.start)}`,
    );
  });
}

function deleteTrigger(functionName, exclude = null) {
  let triggers = ScriptApp.getProjectTriggers();
  for (let trigger of triggers) {
    if (
      trigger.getHandlerFunction() === functionName &&
      trigger.getUniqueId() !== exclude
    ) {
      ScriptApp.deleteTrigger(trigger);
      Logger.log(`Existing trigger deleted for the ${functionName}() function`);
    }
  }
}

// Returns calendar resource
// https://developers.google.com/calendar/api/v3/reference/calendarList#resource

function getCalendar({ calendarName }) {
  // Check input
  if (typeof calendarName !== "string")
    throw new Error("calendarName should be a string");

  // Retrieve and filter calendar list
  const calendarList = Calendar.CalendarList.list({ showHidden: true }).items;
  const filteredList = calendarList.filter((c) => c.summary === calendarName);

  // Throw error if no calendar is found
  if (filteredList.length < 1)
    throw new Error(`Calendar "${calendarName}" not found`);

  // Throw error if multiple calendar are found
  if (filteredList.length > 1)
    throw new Error(`Multiple calendar found for name "${calendarName}"`);

  // Return calendar resource
  const calendar = filteredList[0];
  return calendar;
}

// Returns array with events resources
// https://developers.google.com/calendar/api/v3/reference/events#resource

function getEvents({ calendarId, dateMin, dateMax, sourceCalendarId }) {
  // Check the input
  if (!calendarId) throw new Error("calendarId is missing");

  // Define options
  const options = {
    maxResults: 2500,
    ...(dateMin ? { timeMin: dateMin.toISOString() } : {}),
    ...(dateMax ? { timeMax: dateMax.toISOString() } : {}),
    ...(sourceCalendarId
      ? { privateExtendedProperty: `sourceCalendarId=${sourceCalendarId}` }
      : {}),
  };

  // Retrieve all events with pagination
  let events = [];
  let pageToken = null;
  while (pageToken !== undefined) {
    const { nextPageToken, items } = Calendar.Events.list(
      calendarId,
      pageToken ? { ...options, pageToken } : { ...options },
    );
    events = [...events, ...items];
    pageToken = nextPageToken;
  }

  // Return the events array
  return events;
}

function isEventEqual(firstEvent, secondEvent) {
  firstEvent = JSON.stringify(createSortedEvent(createBareEvent(firstEvent)));
  secondEvent = JSON.stringify(createSortedEvent(createBareEvent(secondEvent)));
  return firstEvent === secondEvent;
}

// Dedicated function to be called by a fallback trigger
// Workaround for script timeout

function startFallback() {
  // Run the start function
  start();
}

// https://moment.github.io/luxon/

eval(`
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t=e[1],n=e[2],r=e[3],i=e[4],o=e[5],a=e[6];return[rn(t,e[7],n,r,i,o,a),f.utcInstance]}var dn=Ut(/([+-]\\d{6}|\\d{4})(?:-?(\\d\\d)(?:-?(\\d\\d))?)?/,I),hn=Ut(/(\\d{4})-?W(\\d\\d)(?:-?(\\d))?/,I),mn=Ut(/(\\d{4})-?(\\d{3})/,I),yn=Ut(Ht),vn=Rt(function(e,t){return[{year:$t(e,t),month:$t(e,t+1,1),day:$t(e,t+2,1)},null,t+3]},Bt,Qt,Kt),gn=Rt(Jt,Bt,Qt,Kt),pn=Rt(Gt,Bt,Qt,Kt),kn=Rt(Bt,Qt,Kt);var wn=Rt(Bt);var bn=Ut(/(\\d{4})-(\\d\\d)-(\\d\\d)/,r),Sn=Ut(t),On=Rt(Bt,Qt,Kt);var Tn="Invalid Duration",a={weeks:{days:7,hours:168,minutes:10080,seconds:604800,milliseconds:6048e5},days:{hours:24,minutes:1440,seconds:86400,milliseconds:864e5},hours:{minutes:60,seconds:3600,milliseconds:36e5},minutes:{seconds:60,milliseconds:6e4},seconds:{milliseconds:1e3}},Nn=l({years:{quarters:4,months:12,weeks:52,days:365,hours:8760,minutes:525600,seconds:31536e3,milliseconds:31536e6},quarters:{months:3,weeks:13,days:91,hours:2184,minutes:131040,seconds:7862400,milliseconds:78624e5},months:{weeks:4,days:30,hours:720,minutes:43200,seconds:2592e3,milliseconds:2592e6}},a),I=365.2425,Ht=30.436875,Dn=l({years:{quarters:4,months:12,weeks:I/7,days:I,hours:24*I,minutes:525949.2,seconds:525949.2*60,milliseconds:525949.2*60*1e3},quarters:{months:3,weeks:I/28,days:I/4,hours:24*I/4,minutes:131487.3,seconds:525949.2*60/4,milliseconds:7889237999.999999},months:{weeks:Ht/7,days:Ht,hours:24*Ht,minutes:43829.1,seconds:2629746,milliseconds:2629746e3}},a),V=["years","quarters","months","weeks","days","hours","minutes","seconds","milliseconds"],Mn=V.slice(0).reverse();function E(e,t,n){n={values:(n=void 0===n?!1:n)?t.values:l({},e.values,t.values||{}),loc:e.loc.clone(t.loc),conversionAccuracy:t.conversionAccuracy||e.conversionAccuracy,matrix:t.matrix||e.matrix};return new x(n)}function In(e,t){for(var n,r=null!=(n=t.milliseconds)?n:0,i=R(Mn.slice(1));!(o=i()).done;){var o=o.value;t[o]&&(r+=t[o]*e[o].milliseconds)}return r}function Vn(i,o){var a=In(i,o)<0?-1:1;V.reduceRight(function(e,t){var n,r;return N(o[t])?e:(e&&(r=o[e]*a,n=i[t][e],r=Math.floor(r/n),o[t]+=r*a,o[e]-=r*n*a),t)},null),V.reduce(function(e,t){var n;return N(o[t])?e:(e&&(n=o[e]%1,o[e]-=n,o[t]+=n*i[e][t]),t)},null)}var x=function(e){function m(e){var t="longterm"===e.conversionAccuracy||!1,n=t?Dn:Nn;e.matrix&&(n=e.matrix),this.values=e.values,this.loc=e.loc||b.create(),this.conversionAccuracy=t?"longterm":"casual",this.invalid=e.invalid||null,this.matrix=n,this.isLuxonDuration=!0}m.fromMillis=function(e,t){return m.fromObject({milliseconds:e},t)},m.fromObject=function(e,t){if(void 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m({invalid:e})},m.normalizeUnit=function(e){var t={year:"years",years:"years",quarter:"quarters",quarters:"quarters",month:"months",months:"months",week:"weeks",weeks:"weeks",day:"days",days:"days",hour:"hours",hours:"hours",minute:"minutes",minutes:"minutes",second:"seconds",seconds:"seconds",millisecond:"milliseconds",milliseconds:"milliseconds"}[e&&e.toLowerCase()];if(t)return t;throw new J(e)},m.isDuration=function(e){return e&&e.isLuxonDuration||!1};var t=m.prototype;return t.toFormat=function(e,t){t=l({},t=void 0===t?{}:t,{floor:!1!==t.round&&!1!==t.floor});return this.isValid?M.create(this.loc,t).formatDurationFromString(this,e):Tn},t.toHuman=function(n){var e,r=this;return void 0===n&&(n={}),this.isValid?(e=V.map(function(e){var t=r.values[e];return N(t)?null:r.loc.numberFormatter(l({style:"unit",unitDisplay:"long"},n,{unit:e.slice(0,-1)})).format(t)}).filter(function(e){return 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0===e?{}:e,t=e.locale,n=e.numberingSystem,r=e.conversionAccuracy,e=e.matrix,t=this.loc.clone({locale:t,numberingSystem:n});return E(this,{loc:t,matrix:e,conversionAccuracy:r})},t.as=function(e){return this.isValid?this.shiftTo(e).get(e):NaN},t.normalize=function(){var e;return this.isValid?(e=this.toObject(),Vn(this.matrix,e),E(this,{values:e},!0)):this},t.rescale=function(){var e;return this.isValid?(e=function(e){for(var t={},n=0,r=Object.entries(e);n<r.length;n++){var i=r[n],o=i[0],i=i[1];0!==i&&(t[o]=i)}return t}(this.normalize().shiftToAll().toObject()),E(this,{values:e},!0)):this},t.shiftTo=function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];if(!this.isValid)return this;if(0===t.length)return this;for(var r,t=t.map(function(e){return m.normalizeUnit(e)}),i={},o={},a=this.toObject(),s=0,u=V;s<u.length;s++){var l=u[s];if(0<=t.indexOf(l)){var c,f=l,d=0;for(c in o)d+=this.matrix[c][l]*o[c],o[c]=0;v(a[l])&&(d+=a[l]);var 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l(e){this.s=e.start,this.e=e.end,this.invalid=e.invalid||null,this.isLuxonInterval=!0}l.invalid=function(e,t){if(void 0===t&&(t=null),!e)throw new u("need to specify a reason the Interval is invalid");e=e instanceof h?e:new h(e,t);if(O.throwOnInvalid)throw new Y(e);return new l({invalid:e})},l.fromDateTimes=function(e,t){var n,e=kr(e),t=kr(t),r=(n=t,(r=e)&&r.isValid?n&&n.isValid?n<r?xn.invalid("end before start","The end of an interval must be after its start, but you had start="+r.toISO()+" and end="+n.toISO()):null:xn.invalid("missing or invalid end"):xn.invalid("missing or invalid start"));return null==r?new l({start:e,end:t}):r},l.after=function(e,t){t=x.fromDurationLike(t),e=kr(e);return l.fromDateTimes(e,e.plus(t))},l.before=function(e,t){t=x.fromDurationLike(t),e=kr(e);return l.fromDateTimes(e.minus(t),e)},l.fromISO=function(e,t){var n,r,i,o=(e||"").split("/",2),a=o[0],s=o[1];if(a&&s){try{u=(n=W.fromISO(a,t)).isValid}catch(s){u=!1}try{i=(r=W.fromISO(s,t)).isValid}catch(s){i=!1}if(u&&i)return l.fromDateTimes(n,r);if(u){o=x.fromISO(s,t);if(o.isValid)return l.after(n,o)}else if(i){var u=x.fromISO(a,t);if(u.isValid)return l.before(r,u)}}return l.invalid("unparsable",'the input "'+e+"\\" can't be parsed as ISO 8601")},l.isInterval=function(e){return e&&e.isLuxonInterval||!1};var t=l.prototype;return t.length=function(e){return void 0===e&&(e="milliseconds"),this.isValid?this.toDuration.apply(this,[e]).get(e):NaN},t.count=function(e,t){var n,r;return this.isValid?(n=this.start.startOf(e=void 0===e?"milliseconds":e,t),r=(r=null!=t&&t.useLocaleWeeks?this.end.reconfigure({locale:n.locale}):this.end).startOf(e,t),Math.floor(r.diff(n,e).get(e))+(r.valueOf()!==this.end.valueOf())):NaN},t.hasSame=function(e){return!!this.isValid&&(this.isEmpty()||this.e.minus(1).hasSame(this.s,e))},t.isEmpty=function(){return this.s.valueOf()===this.e.valueOf()},t.isAfter=function(e){return!!this.isValid&&this.s>e},t.isBefore=function(e){return!!this.isValid&&this.e<=e},t.contains=function(e){return!!this.isValid&&this.s<=e&&this.e>e},t.set=function(e){var e=void 0===e?{}:e,t=e.start,e=e.end;return this.isValid?l.fromDateTimes(t||this.s,e||this.e):this},t.splitAt=function(){var t=this;if(!this.isValid)return[];for(var e=arguments.length,n=new Array(e),r=0;r<e;r++)n[r]=arguments[r];for(var i=n.map(kr).filter(function(e){return t.contains(e)}).sort(function(e,t){return e.toMillis()-t.toMillis()}),o=[],a=this.s,s=0;a<this.e;){var u=i[s]||this.e,u=+u>+this.e?this.e:u;o.push(l.fromDateTimes(a,u)),a=u,s+=1}return o},t.splitBy=function(e){var t=x.fromDurationLike(e);if(!this.isValid||!t.isValid||0===t.as("milliseconds"))return[];for(var n=this.s,r=1,i=[];n<this.e;){var o=this.start.plus(t.mapUnits(function(e){return e*r})),o=+o>+this.e?this.e:o;i.push(l.fromDateTimes(n,o)),n=o,r+=1}return i},t.divideEqually=function(e){return this.isValid?this.splitBy(this.length()/e).slice(0,e):[]},t.overlaps=function(e){return this.e>e.s&&this.s<e.e},t.abutsStart=function(e){return!!this.isValid&&+this.e==+e.s},t.abutsEnd=function(e){return!!this.isValid&&+e.e==+this.s},t.engulfs=function(e){return!!this.isValid&&this.s<=e.s&&this.e>=e.e},t.equals=function(e){return!(!this.isValid||!e.isValid)&&this.s.equals(e.s)&&this.e.equals(e.e)},t.intersection=function(e){var t;return this.isValid?(t=(this.s>e.s?this:e).s,(e=(this.e<e.e?this:e).e)<=t?null:l.fromDateTimes(t,e)):this},t.union=function(e){var t;return this.isValid?(t=(this.s<e.s?this:e).s,e=(this.e>e.e?this:e).e,l.fromDateTimes(t,e)):this},l.merge=function(e){var e=e.sort(function(e,t){return e.s-t.s}).reduce(function(e,t){var n=e[0],e=e[1];return e?e.overlaps(t)||e.abutsStart(t)?[n,e.union(t)]:[n.concat([e]),t]:[n,t]},[[],null]),t=e[0],e=e[1];return e&&t.push(e),t},l.xor=function(e){for(var t,n=null,r=0,i=[],e=e.map(function(e){return[{time:e.s,type:"s"},{time:e.e,type:"e"}]}),o=R((t=Array.prototype).concat.apply(t,e).sort(function(e,t){return e.time-t.time}));!(a=o()).done;)var a=a.value,n=1===(r+="s"===a.type?1:-1)?a.time:(n&&+n!=+a.time&&i.push(l.fromDateTimes(n,a.time)),null);return l.merge(i)},t.difference=function(){for(var t=this,e=arguments.length,n=new Array(e),r=0;r<e;r++)n[r]=arguments[r];return l.xor([this].concat(n)).map(function(e){return t.intersection(e)}).filter(function(e){return e&&!e.isEmpty()})},t.toString=function(){return this.isValid?"["+this.s.toISO()+" – "+this.e.toISO()+")":En},t[e]=function(){return this.isValid?"Interval { start: "+this.s.toISO()+", end: "+this.e.toISO()+" }":"Interval { Invalid, reason: "+this.invalidReason+" }"},t.toLocaleString=function(e,t){return void 0===e&&(e=G),void 0===t&&(t={}),this.isValid?M.create(this.s.loc.clone(t),e).formatInterval(this):En},t.toISO=function(e){return 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k({ts:e,zone:S(t.zone,O.defaultZone),loc:b.fromObject(t)});throw new u("fromMillis requires a numerical input, but received a "+typeof e+" with value "+e)},k.fromSeconds=function(e,t){if(void 0===t&&(t={}),v(e))return new k({ts:1e3*e,zone:S(t.zone,O.defaultZone),loc:b.fromObject(t)});throw new u("fromSeconds requires a numerical input")},k.fromObject=function(e,t){e=e||{};var n=S((t=void 0===t?{}:t).zone,O.defaultZone);if(!n.isValid)return k.invalid(Bn(n));var r=b.fromObject(t),i=Tt(e,mr),o=it(i,r),a=o.minDaysInFirstWeek,o=o.startOfWeek,s=O.now(),t=N(t.specificOffset)?n.offset(s):t.specificOffset,u=!N(i.ordinal),l=!N(i.year),c=!N(i.month)||!N(i.day),l=l||c,f=i.weekYear||i.weekNumber;if((l||u)&&f)throw new w("Can't mix weekYear/weekNumber units with year/month/day or ordinals");if(c&&u)throw new w("Can't mix ordinal dates with month/day");for(var d,c=f||i.weekday&&!l,h=er(s,t),m=(c?(p=dr,d=lr,h=et(h,a,o)):u?(p=hr,d=cr,h=nt(h)):(p=fr,d=ur),!1),y=R(p);!(v=y()).done;){var v=v.value;N(i[v])?i[v]=(m?d:h)[v]:m=!0}var g,p=(c?(f=a,s=o,g=st((p=i).weekYear),f=D(p.weekNumber,1,kt(p.weekYear,f=void 0===f?4:f,s=void 0===s?1:s)),s=D(p.weekday,1,7),g?f?!s&&T("weekday",p.weekday):T("week",p.weekNumber):T("weekYear",p.weekYear)):u?(f=st((g=i).year),s=D(g.ordinal,1,yt(g.year)),f?!s&&T("ordinal",g.ordinal):T("year",g.year)):ot(i))||at(i);return p?k.invalid(p):(s=new k({ts:(f=tr(c?tt(i,a,o):u?rt(i):i,t,n))[0],zone:n,o:f[1],loc:r}),i.weekday&&l&&e.weekday!==s.weekday?k.invalid("mismatched weekday","you can't specify both a weekday of "+i.weekday+" and a date of "+s.toISO()):s.isValid?s:k.invalid(s.invalid))},k.fromISO=function(e,t){void 0===t&&(t={});var n=Pt(e,[dn,vn],[hn,gn],[mn,pn],[yn,kn]);return rr(n[0],n[1],t,"ISO 8601",e)},k.fromRFC2822=function(e,t){void 0===t&&(t={});var n=Pt(e.replace(/\\([^()]*\\)|[\\n\\t]/g," ").replace(/(\\s\\s+)/g," ").trim(),[on,an]);return rr(n[0],n[1],t,"RFC 2822",e)},k.fromHTTP=function(e,t){void 0===t&&(t={});e=Pt(e,[sn,cn],[un,cn],[ln,fn]);return rr(e[0],e[1],t,"HTTP",t)},k.fromFormat=function(e,t,n){if(void 0===n&&(n={}),N(e)||N(t))throw new u("fromFormat requires an input string and a format");var r=n,i=r.locale,r=r.numberingSystem,i=b.fromOpts({locale:void 0===i?null:i,numberingSystem:void 0===r?null:r,defaultToEN:!0}),i=[(r=Jn(r=i,e,t)).result,r.zone,r.specificOffset,r.invalidReason],r=i[0],o=i[1],a=i[2],i=i[3];return i?k.invalid(i):rr(r,o,n,"format "+t,e,a)},k.fromString=function(e,t,n){return k.fromFormat(e,t,n=void 0===n?{}:n)},k.fromSQL=function(e,t){void 0===t&&(t={});var n=Pt(e,[bn,vn],[Sn,On]);return rr(n[0],n[1],t,"SQL",e)},k.invalid=function(e,t){if(void 0===t&&(t=null),!e)throw new u("need to specify a reason the DateTime is invalid");e=e instanceof h?e:new h(e,t);if(O.throwOnInvalid)throw new P(e);return new k({invalid:e})},k.isDateTime=function(e){return e&&e.isLuxonDateTime||!1},k.parseFormatForOpts=function(e,t){e=Gn(e,b.fromObject(t=void 0===t?{}:t));return e?e.map(function(e){return e?e.val:null}).join(""):null},k.expandFormat=function(e,t){return void 0===t&&(t={}),Yn(M.parseFormat(e),b.fromObject(t)).map(function(e){return e.val}).join("")},k.resetCache=function(){sr=void 0,pr={}};var t=k.prototype;return t.get=function(e){return this[e]},t.getPossibleOffsets=function(){var e,t,n,r;return this.isValid&&!this.isOffsetFixed&&(e=gt(this.c),n=this.zone.offset(e-864e5),r=this.zone.offset(e+864e5),(n=this.zone.offset(e-6e4*n))!==(r=this.zone.offset(e-6e4*r)))&&(t=e-6e4*r,n=er(e=e-6e4*n,n),r=er(t,r),n.hour===r.hour)&&n.minute===r.minute&&n.second===r.second&&n.millisecond===r.millisecond?[Z(this,{ts:e}),Z(this,{ts:t})]:[this]},t.resolvedLocaleOptions=function(e){e=M.create(this.loc.clone(e=void 0===e?{}:e),e).resolvedOptions(this);return{locale:e.locale,numberingSystem:e.numberingSystem,outputCalendar:e.calendar}},t.toUTC=function(e,t){return void 0===t&&(t={}),this.setZone(f.instance(e=void 0===e?0:e),t)},t.toLocal=function(){return this.setZone(O.defaultZone)},t.setZone=function(e,t){var n,t=void 0===t?{}:t,r=t.keepLocalTime,r=void 0!==r&&r,t=t.keepCalendarTime,t=void 0!==t&&t;return(e=S(e,O.defaultZone)).equals(this.zone)?this:e.isValid?(n=this.ts,(r||t)&&(r=e.offset(this.ts),n=tr(this.toObject(),r,e)[0]),Z(this,{ts:n,zone:e})):k.invalid(Bn(e))},t.reconfigure=function(e){var e=void 0===e?{}:e,t=e.locale,n=e.numberingSystem,e=e.outputCalendar,t=this.loc.clone({locale:t,numberingSystem:n,outputCalendar:e});return Z(this,{loc:t})},t.setLocale=function(e){return this.reconfigure({locale:e})},t.set=function(e){if(!this.isValid)return this;var t,e=Tt(e,mr),n=it(e,this.loc),r=n.minDaysInFirstWeek,n=n.startOfWeek,i=!N(e.weekYear)||!N(e.weekNumber)||!N(e.weekday),o=!N(e.ordinal),a=!N(e.year),s=!N(e.month)||!N(e.day),u=e.weekYear||e.weekNumber;if((a||s||o)&&u)throw new w("Can't mix weekYear/weekNumber units with year/month/day or ordinals");if(s&&o)throw new w("Can't mix ordinal dates with month/day");i?t=tt(l({},et(this.c,r,n),e),r,n):N(e.ordinal)?(t=l({},this.toObject(),e),N(e.day)&&(t.day=Math.min(vt(t.year,t.month),t.day))):t=rt(l({},nt(this.c),e));a=tr(t,this.o,this.zone);return Z(this,{ts:a[0],o:a[1]})},t.plus=function(e){return this.isValid?Z(this,nr(this,x.fromDurationLike(e))):this},t.minus=function(e){return this.isValid?Z(this,nr(this,x.fromDurationLike(e).negate())):this},t.startOf=function(e,t){t=(void 0===t?{}:t).useLocaleWeeks,t=void 0!==t&&t;if(!this.isValid)return this;var n={},e=x.normalizeUnit(e);switch(e){case"years":n.month=1;case"quarters":case"months":n.day=1;case"weeks":case"days":n.hour=0;case"hours":n.minute=0;case"minutes":n.second=0;case"seconds":n.millisecond=0}return"weeks"===e&&(t?(t=this.loc.getStartOfWeek(),this.weekday<t&&(n.weekNumber=this.weekNumber-1),n.weekday=t):n.weekday=1),"quarters"===e&&(t=Math.ceil(this.month/3),n.month=3*(t-1)+1),this.set(n)},t.endOf=function(e,t){var n;return this.isValid?this.plus(((n={})[e]=1,n)).startOf(e,t).minus(1):this},t.toFormat=function(e,t){return void 0===t&&(t={}),this.isValid?M.create(this.loc.redefaultToEN(t)).formatDateTimeFromString(this,e):$n},t.toLocaleString=function(e,t){return void 0===e&&(e=G),void 0===t&&(t={}),this.isValid?M.create(this.loc.clone(t),e).formatDateTime(this):$n},t.toLocaleParts=function(e){return void 0===e&&(e={}),this.isValid?M.create(this.loc.clone(e),e).formatDateTimeParts(this):[]},t.toISO=function(e){var t,e=void 0===e?{}:e,n=e.format,r=e.suppressSeconds,r=void 0!==r&&r,i=e.suppressMilliseconds,i=void 0!==i&&i,o=e.includeOffset,o=void 0===o||o,e=e.extendedZone,e=void 0!==e&&e;return this.isValid?(t=or(this,n="extended"===(void 0===n?"extended":n)),(t+="T")+ar(this,n,r,i,o,e)):null},t.toISODate=function(e){e=(void 0===e?{}:e).format;return this.isValid?or(this,"extended"===(void 0===e?"extended":e)):null},t.toISOWeekDate=function(){return ir(this,"kkkk-'W'WW-c")},t.toISOTime=function(e){var e=void 0===e?{}:e,t=e.suppressMilliseconds,n=e.suppressSeconds,r=e.includeOffset,i=e.includePrefix,o=e.extendedZone,e=e.format;return this.isValid?(void 0!==i&&i?"T":"")+ar(this,"extended"===(void 0===e?"extended":e),void 0!==n&&n,void 0!==t&&t,void 0===r||r,void 0!==o&&o):null},t.toRFC2822=function(){return ir(this,"EEE, dd LLL yyyy HH:mm:ss ZZZ",!1)},t.toHTTP=function(){return ir(this.toUTC(),"EEE, dd LLL yyyy HH:mm:ss 'GMT'")},t.toSQLDate=function(){return this.isValid?or(this,!0):null},t.toSQLTime=function(e){var e=void 0===e?{}:e,t=e.includeOffset,t=void 0===t||t,n=e.includeZone,n=void 0!==n&&n,e=e.includeOffsetSpace,r="HH:mm:ss.SSS";return(n||t)&&((void 0===e||e)&&(r+=" "),n?r+="z":t&&(r+="ZZ")),ir(this,r,!0)},t.toSQL=function(e){return void 0===e&&(e={}),this.isValid?this.toSQLDate()+" "+this.toSQLTime(e):null},t.toString=function(){return this.isValid?this.toISO():$n},t[e]=function(){return this.isValid?"DateTime { ts: "+this.toISO()+", zone: "+this.zone.name+", locale: "+this.locale+" }":"DateTime { Invalid, reason: "+this.invalidReason+" }"},t.valueOf=function(){return this.toMillis()},t.toMillis=function(){return this.isValid?this.ts:NaN},t.toSeconds=function(){return this.isValid?this.ts/1e3:NaN},t.toUnixInteger=function(){return this.isValid?Math.floor(this.ts/1e3):NaN},t.toJSON=function(){return this.toISO()},t.toBSON=function(){return this.toJSDate()},t.toObject=function(e){var t;return void 0===e&&(e={}),this.isValid?(t=l({},this.c),e.includeConfig&&(t.outputCalendar=this.outputCalendar,t.numberingSystem=this.loc.numberingSystem,t.locale=this.loc.locale),t):{}},t.toJSDate=function(){return new Date(this.isValid?this.ts:NaN)},t.diff=function(e,t,n){var r;return void 0===t&&(t="milliseconds"),void 0===n&&(n={}),this.isValid&&e.isValid?(n=l({locale:this.locale,numberingSystem:this.numberingSystem},n),t=t,t=(Array.isArray(t)?t:[t]).map(x.normalizeUnit),e=Zn((r=e.valueOf()>this.valueOf())?this:e,r?e:this,t,n),r?e.negate():e):x.invalid("created by diffing an invalid DateTime")},t.diffNow=function(e,t){return void 0===e&&(e="milliseconds"),void 0===t&&(t={}),this.diff(k.now(),e,t)},t.until=function(e){return this.isValid?xn.fromDateTimes(this,e):this},t.hasSame=function(e,t,n){var r;return!!this.isValid&&(r=e.valueOf(),(e=this.setZone(e.zone,{keepLocalTime:!0})).startOf(t,n)<=r)&&r<=e.endOf(t,n)},t.equals=function(e){return this.isValid&&e.isValid&&this.valueOf()===e.valueOf()&&this.zone.equals(e.zone)&&this.loc.equals(e.loc)},t.toRelative=function(e){var t,n,r,i;return this.isValid?(t=(e=void 0===e?{}:e).base||k.fromObject({},{zone:this.zone}),n=e.padding?this<t?-e.padding:e.padding:0,r=["years","months","days","hours","minutes","seconds"],i=e.unit,Array.isArray(e.unit)&&(r=e.unit,i=void 0),vr(t,this.plus(n),l({},e,{numeric:"always",units:r,unit:i}))):null},t.toRelativeCalendar=function(e){return void 0===e&&(e={}),this.isValid?vr(e.base||k.fromObject({},{zone:this.zone}),this,l({},e,{numeric:"auto",units:["years","months","days"],calendary:!0})):null},k.min=function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];if(t.every(k.isDateTime))return ct(t,function(e){return e.valueOf()},Math.min);throw new u("min requires all arguments be DateTimes")},k.max=function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];if(t.every(k.isDateTime))return ct(t,function(e){return e.valueOf()},Math.max);throw new u("max requires all arguments be DateTimes")},k.fromFormatExplain=function(e,t,n){var n=n=void 0===n?{}:n,r=n.locale,n=n.numberingSystem;return Jn(b.fromOpts({locale:void 0===r?null:r,numberingSystem:void 0===n?null:n,defaultToEN:!0}),e,t)},k.fromStringExplain=function(e,t,n){return k.fromFormatExplain(e,t,n=void 0===n?{}:n)},k.buildFormatParser=function(e,t){var t=t=void 0===t?{}:t,n=t.locale,t=t.numberingSystem,n=b.fromOpts({locale:void 0===n?null:n,numberingSystem:void 0===t?null:t,defaultToEN:!0});return new Hn(n,e)},k.fromFormatParser=function(e,t,n){if(void 0===n&&(n={}),N(e)||N(t))throw new u("fromFormatParser requires an input string and a format parser");var r,i,o,a=n,s=a.locale,a=a.numberingSystem,s=b.fromOpts({locale:void 0===s?null:s,numberingSystem:void 0===a?null:a,defaultToEN:!0});if(s.equals(t.locale))return r=(a=t.explainFromTokens(e)).result,i=a.zone,o=a.specificOffset,(a=a.invalidReason)?k.invalid(a):rr(r,i,n,"format "+t.format,e,o);throw new u("fromFormatParser called with a locale of "+s+", but the format parser was created for "+t.locale)},i(k,[{key:"isValid",get:function(){return null===this.invalid}},{key:"invalidReason",get:function(){return this.invalid?this.invalid.reason:null}},{key:"invalidExplanation",get:function(){return this.invalid?this.invalid.explanation:null}},{key:"locale",get:function(){return this.isValid?this.loc.locale:null}},{key:"numberingSystem",get:function(){return this.isValid?this.loc.numberingSystem:null}},{key:"outputCalendar",get:function(){return this.isValid?this.loc.outputCalendar:null}},{key:"zone",get:function(){return this._zone}},{key:"zoneName",get:function(){return this.isValid?this.zone.name:null}},{key:"year",get:function(){return this.isValid?this.c.year:NaN}},{key:"quarter",get:function(){return this.isValid?Math.ceil(this.c.month/3):NaN}},{key:"month",get:function(){return this.isValid?this.c.month:NaN}},{key:"day",get:function(){return this.isValid?this.c.day:NaN}},{key:"hour",get:function(){return this.isValid?this.c.hour:NaN}},{key:"minute",get:function(){return this.isValid?this.c.minute:NaN}},{key:"second",get:function(){return this.isValid?this.c.second:NaN}},{key:"millisecond",get:function(){return this.isValid?this.c.millisecond:NaN}},{key:"weekYear",get:function(){return this.isValid?Qn(this).weekYear:NaN}},{key:"weekNumber",get:function(){return this.isValid?Qn(this).weekNumber:NaN}},{key:"weekday",get:function(){return this.isValid?Qn(this).weekday:NaN}},{key:"isWeekend",get:function(){return this.isValid&&this.loc.getWeekendDays().includes(this.weekday)}},{key:"localWeekday",get:function(){return this.isValid?Kn(this).weekday:NaN}},{key:"localWeekNumber",get:function(){return this.isValid?Kn(this).weekNumber:NaN}},{key:"localWeekYear",get:function(){return this.isValid?Kn(this).weekYear:NaN}},{key:"ordinal",get:function(){return this.isValid?nt(this.c).ordinal:NaN}},{key:"monthShort",get:function(){return this.isValid?Fn.months("short",{locObj:this.loc})[this.month-1]:null}},{key:"monthLong",get:function(){return this.isValid?Fn.months("long",{locObj:this.loc})[this.month-1]:null}},{key:"weekdayShort",get:function(){return this.isValid?Fn.weekdays("short",{locObj:this.loc})[this.weekday-1]:null}},{key:"weekdayLong",get:function(){return this.isValid?Fn.weekdays("long",{locObj:this.loc})[this.weekday-1]:null}},{key:"offset",get:function(){return this.isValid?+this.o:NaN}},{key:"offsetNameShort",get:function(){return this.isValid?this.zone.offsetName(this.ts,{format:"short",locale:this.locale}):null}},{key:"offsetNameLong",get:function(){return this.isValid?this.zone.offsetName(this.ts,{format:"long",locale:this.locale}):null}},{key:"isOffsetFixed",get:function(){return this.isValid?this.zone.isUniversal:null}},{key:"isInDST",get:function(){return!this.isOffsetFixed&&(this.offset>this.set({month:1,day:1}).offset||this.offset>this.set({month:5}).offset)}},{key:"isInLeapYear",get:function(){return mt(this.year)}},{key:"daysInMonth",get:function(){return vt(this.year,this.month)}},{key:"daysInYear",get:function(){return this.isValid?yt(this.year):NaN}},{key:"weeksInWeekYear",get:function(){return this.isValid?kt(this.weekYear):NaN}},{key:"weeksInLocalWeekYear",get:function(){return this.isValid?kt(this.localWeekYear,this.loc.getMinDaysInFirstWeek(),this.loc.getStartOfWeek()):NaN}}],[{key:"DATE_SHORT",get:function(){return G}},{key:"DATE_MED",get:function(){return $}},{key:"DATE_MED_WITH_WEEKDAY",get:function(){return B}},{key:"DATE_FULL",get:function(){return Q}},{key:"DATE_HUGE",get:function(){return K}},{key:"TIME_SIMPLE",get:function(){return X}},{key:"TIME_WITH_SECONDS",get:function(){return ee}},{key:"TIME_WITH_SHORT_OFFSET",get:function(){return te}},{key:"TIME_WITH_LONG_OFFSET",get:function(){return ne}},{key:"TIME_24_SIMPLE",get:function(){return re}},{key:"TIME_24_WITH_SECONDS",get:function(){return ie}},{key:"TIME_24_WITH_SHORT_OFFSET",get:function(){return oe}},{key:"TIME_24_WITH_LONG_OFFSET",get:function(){return ae}},{key:"DATETIME_SHORT",get:function(){return se}},{key:"DATETIME_SHORT_WITH_SECONDS",get:function(){return ue}},{key:"DATETIME_MED",get:function(){return le}},{key:"DATETIME_MED_WITH_SECONDS",get:function(){return ce}},{key:"DATETIME_MED_WITH_WEEKDAY",get:function(){return fe}},{key:"DATETIME_FULL",get:function(){return de}},{key:"DATETIME_FULL_WITH_SECONDS",get:function(){return he}},{key:"DATETIME_HUGE",get:function(){return me}},{key:"DATETIME_HUGE_WITH_SECONDS",get:function(){return ye}}]),k}(Symbol.for("nodejs.util.inspect.custom"));function kr(e){if(W.isDateTime(e))return e;if(e&&e.valueOf&&v(e.valueOf()))return W.fromJSDate(e);if(e&&"object"==typeof e)return W.fromObject(e);throw new u("Unknown datetime argument: "+e+", of type "+typeof e)}return e.DateTime=W,e.Duration=x,e.FixedOffsetZone=f,e.IANAZone=c,e.Info=Fn,e.Interval=xn,e.InvalidZone=Le,e.Settings=O,e.SystemZone=ge,e.VERSION="3.5.0",e.Zone=s,Object.defineProperty(e,"__esModule",{value:!0}),e}({});
`);

const DateTime = luxon.DateTime;
const DateTimeInterval = luxon.Interval;

// https://github.com/jkbrzt/rrule

eval(`
    !function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.rrule=e():t.rrule=e()}("undefined"!=typeof self?self:this,(()=>(()=>{"use strict";var t={d:(e,n)=>{for(var r in n)t.o(n,r)&&!t.o(e,r)&&Object.defineProperty(e,r,{enumerable:!0,get:n[r]})},o:(t,e)=>Object.prototype.hasOwnProperty.call(t,e),r:t=>{"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})}},e={};t.r(e),t.d(e,{ALL_WEEKDAYS:()=>n,Frequency:()=>Z,RRule:()=>Pt,RRuleSet:()=>Gt,Weekday:()=>r,datetime:()=>b,rrulestr:()=>Kt});var n=["MO","TU","WE","TH","FR","SA","SU"],r=function(){function t(t,e){if(0===e)throw new Error("Can't create weekday with n == 0");this.weekday=t,this.n=e}return t.fromStr=function(e){return new t(n.indexOf(e))},t.prototype.nth=function(e){return this.n===e?this:new t(this.weekday,e)},t.prototype.equals=function(t){return this.weekday===t.weekday&&this.n===t.n},t.prototype.toString=function(){var t=n[this.weekday];return this.n&&(t=(this.n>0?"+":"")+String(this.n)+t),t},t.prototype.getJsWeekday=function(){return 6===this.weekday?0:this.weekday+1},t}(),i=function(t){return null!=t},o=function(t){return"number"==typeof t},a=function(t){return"string"==typeof t&&n.includes(t)},s=Array.isArray,u=function(t,e){void 0===e&&(e=t),1===arguments.length&&(e=t,t=0);for(var n=[],r=t;r<e;r++)n.push(r);return n},h=function(t,e){var n=0,r=[];if(s(t))for(;n<e;n++)r[n]=[].concat(t);else for(;n<e;n++)r[n]=t;return r};function y(t,e,n){void 0===n&&(n=" ");var r=String(t);return e>>=0,r.length>e?String(r):((e-=r.length)>n.length&&(n+=h(n,e/n.length)),n.slice(0,e)+String(r))}var c=function(t,e){var n=t%e;return n*e<0?n+e:n},d=function(t,e){return{div:Math.floor(t/e),mod:c(t,e)}},l=function(t){return!i(t)||0===t.length},f=function(t){return!l(t)},p=function(t,e){return f(t)&&-1!==t.indexOf(e)},b=function(t,e,n,r,i,o){return void 0===r&&(r=0),void 0===i&&(i=0),void 0===o&&(o=0),new Date(Date.UTC(t,e-1,n,r,i,o))},m=[31,28,31,30,31,30,31,31,30,31,30,31],w=864e5,v=b(1970,1,1),g=[6,0,1,2,3,4,5],k=function(t){return t%4==0&&t%100!=0||t%400==0},E=function(t){return t instanceof Date},T=function(t){return E(t)&&!isNaN(t.getTime())},x=function(t){return e=v,n=t.getTime()-e.getTime(),Math.round(n/w);var e,n},D=function(t){return new Date(v.getTime()+t*w)},O=function(t){var e=t.getUTCMonth();return 1===e&&k(t.getUTCFullYear())?29:m[e]},S=function(t){return g[t.getUTCDay()]},U=function(t,e){var n=b(t,e+1,1);return[S(n),O(n)]},Y=function(t,e){return e=e||t,new Date(Date.UTC(t.getUTCFullYear(),t.getUTCMonth(),t.getUTCDate(),e.getHours(),e.getMinutes(),e.getSeconds(),e.getMilliseconds()))},L=function(t){return new Date(t.getTime())},M=function(t){for(var e=[],n=0;n<t.length;n++)e.push(L(t[n]));return e},_=function(t){t.sort((function(t,e){return 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Date(e.dt.getTime()-1):"after"===t&&(this.minDate=e.inc?e.dt:new Date(e.dt.getTime()+1))}return t.prototype.accept=function(t){++this.total;var e=this.minDate&&t<this.minDate,n=this.maxDate&&t>this.maxDate;if("between"===this.method){if(e)return!0;if(n)return!1}else if("before"===this.method){if(n)return!1}else if("after"===this.method)return!!e||(this.add(t),!1);return this.add(t)},t.prototype.add=function(t){return this._result.push(t),!0},t.prototype.getValue=function(){var t=this._result;switch(this.method){case"all":case"between":return t;default:return t.length?t[t.length-1]:null}},t.prototype.clone=function(){return new t(this.method,this.args)},t}();var I=function(t,e){return I=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n])},I(t,e)};function j(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Class extends value "+String(e)+" is not a constructor 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t.toString()},K=function(t,e,n){return"".concat(e," ").concat(n,", ").concat(t)};const B=function(){function t(t,e,n,r){if(void 0===e&&(e=z),void 0===n&&(n=P),void 0===r&&(r=K),this.text=[],this.language=n||P,this.gettext=e,this.dateFormatter=r,this.rrule=t,this.options=t.options,this.origOptions=t.origOptions,this.origOptions.bymonthday){var o=[].concat(this.options.bymonthday),a=[].concat(this.options.bynmonthday);o.sort((function(t,e){return t-e})),a.sort((function(t,e){return e-t})),this.bymonthday=o.concat(a),this.bymonthday.length||(this.bymonthday=null)}if(i(this.origOptions.byweekday)){var u=s(this.origOptions.byweekday)?this.origOptions.byweekday:[this.origOptions.byweekday],h=String(u);this.byweekday={allWeeks:u.filter((function(t){return!t.n})),someWeeks:u.filter((function(t){return Boolean(t.n)})),isWeekdays:-1!==h.indexOf("MO")&&-1!==h.indexOf("TU")&&-1!==h.indexOf("WE")&&-1!==h.indexOf("TH")&&-1!==h.indexOf("FR")&&-1===h.indexOf("SA")&&-1===h.indexOf("SU"),isEveryDay:-1!==h.indexOf("MO")&&-1!==h.indexOf("TU")&&-1!==h.indexOf("WE")&&-1!==h.indexOf("TH")&&-1!==h.indexOf("FR")&&-1!==h.indexOf("SA")&&-1!==h.indexOf("SU")};var y=function(t,e){return t.weekday-e.weekday};this.byweekday.allWeeks.sort(y),this.byweekday.someWeeks.sort(y),this.byweekday.allWeeks.length||(this.byweekday.allWeeks=null),this.byweekday.someWeeks.length||(this.byweekday.someWeeks=null)}else this.byweekday=null}return t.isFullyConvertible=function(e){if(!(e.options.freq in t.IMPLEMENTED))return!1;if(e.origOptions.until&&e.origOptions.count)return!1;for(var n in e.origOptions){if(F(["dtstart","tzid","wkst","freq"],n))return!0;if(!F(t.IMPLEMENTED[e.options.freq],n))return!1}return!0},t.prototype.isFullyConvertible=function(){return t.isFullyConvertible(this.rrule)},t.prototype.toString=function(){var e=this.gettext;if(!(this.options.freq in t.IMPLEMENTED))return e("RRule error: Unable to fully convert this rrule to text");if(this.text=[e("every")],this[Pt.FREQUENCIES[this.options.freq]](),this.options.until){this.add(e("until"));var n=this.options.until;this.add(this.dateFormatter(n.getUTCFullYear(),this.language.monthNames[n.getUTCMonth()],n.getUTCDate()))}else this.options.count&&this.add(e("for")).add(this.options.count.toString()).add(this.plural(this.options.count)?e("times"):e("time"));return this.isFullyConvertible()||this.add(e("(~ approximate)")),this.text.join("")},t.prototype.HOURLY=function(){var t=this.gettext;1!==this.options.interval&&this.add(this.options.interval.toString()),this.add(this.plural(this.options.interval)?t("hours"):t("hour"))},t.prototype.MINUTELY=function(){var t=this.gettext;1!==this.options.interval&&this.add(this.options.interval.toString()),this.add(this.plural(this.options.interval)?t("minutes"):t("minute"))},t.prototype.DAILY=function(){var t=this.gettext;1!==this.options.interval&&this.add(this.options.interval.toString()),this.byweekday&&this.byweekday.isWeekdays?this.add(this.plural(this.options.interval)?t("weekdays"):t("weekday")):this.add(this.plural(this.options.interval)?t("days"):t("day")),this.origOptions.bymonth&&(this.add(t("in")),this._bymonth()),this.bymonthday?this._bymonthday():this.byweekday?this._byweekday():this.origOptions.byhour&&this._byhour()},t.prototype.WEEKLY=function(){var t=this.gettext;1!==this.options.interval&&this.add(this.options.interval.toString()).add(this.plural(this.options.interval)?t("weeks"):t("week")),this.byweekday&&this.byweekday.isWeekdays?1===this.options.interval?this.add(this.plural(this.options.interval)?t("weekdays"):t("weekday")):this.add(t("on")).add(t("weekdays")):this.byweekday&&this.byweekday.isEveryDay?this.add(this.plural(this.options.interval)?t("days"):t("day")):(1===this.options.interval&&this.add(t("week")),this.origOptions.bymonth&&(this.add(t("in")),this._bymonth()),this.bymonthday?this._bymonthday():this.byweekday&&this._byweekday(),this.origOptions.byhour&&this._byhour())},t.prototype.MONTHLY=function(){var t=this.gettext;this.origOptions.bymonth?(1!==this.options.interval&&(this.add(this.options.interval.toString()).add(t("months")),this.plural(this.options.interval)&&this.add(t("in"))),this._bymonth()):(1!==this.options.interval&&this.add(this.options.interval.toString()),this.add(this.plural(this.options.interval)?t("months"):t("month"))),this.bymonthday?this._bymonthday():this.byweekday&&this.byweekday.isWeekdays?this.add(t("on")).add(t("weekdays")):this.byweekday&&this._byweekday()},t.prototype.YEARLY=function(){var t=this.gettext;this.origOptions.bymonth?(1!==this.options.interval&&(this.add(this.options.interval.toString()),this.add(t("years"))),this._bymonth()):(1!==this.options.interval&&this.add(this.options.interval.toString()),this.add(this.plural(this.options.interval)?t("years"):t("year"))),this.bymonthday?this._bymonthday():this.byweekday&&this._byweekday(),this.options.byyearday&&this.add(t("on the")).add(this.list(this.options.byyearday,this.nth,t("and"))).add(t("day")),this.options.byweekno&&this.add(t("in")).add(this.plural(this.options.byweekno.length)?t("weeks"):t("week")).add(this.list(this.options.byweekno,void 0,t("and")))},t.prototype._bymonthday=function(){var t=this.gettext;this.byweekday&&this.byweekday.allWeeks?this.add(t("on")).add(this.list(this.byweekday.allWeeks,this.weekdaytext,t("or"))).add(t("the")).add(this.list(this.bymonthday,this.nth,t("or"))):this.add(t("on the")).add(this.list(this.bymonthday,this.nth,t("and")))},t.prototype._byweekday=function(){var t=this.gettext;this.byweekday.allWeeks&&!this.byweekday.isWeekdays&&this.add(t("on")).add(this.list(this.byweekday.allWeeks,this.weekdaytext)),this.byweekday.someWeeks&&(this.byweekday.allWeeks&&this.add(t("and")),this.add(t("on the")).add(this.list(this.byweekday.someWeeks,this.weekdaytext,t("and"))))},t.prototype._byhour=function(){var t=this.gettext;this.add(t("at")).add(this.list(this.origOptions.byhour,void 0,t("and")))},t.prototype._bymonth=function(){this.add(this.list(this.options.bymonth,this.monthtext,this.gettext("and")))},t.prototype.nth=function(t){var e;t=parseInt(t.toString(),10);var n=this.gettext;if(-1===t)return n("last");var r=Math.abs(t);switch(r){case 1:case 21:case 31:e=r+n("st");break;case 2:case 22:e=r+n("nd");break;case 3:case 23:e=r+n("rd");break;default:e=r+n("th")}return t<0?e+" "+n("last"):e},t.prototype.monthtext=function(t){return this.language.monthNames[t-1]},t.prototype.weekdaytext=function(t){var e=o(t)?(t+1)%7:t.getJsWeekday();return(t.n?this.nth(t.n)+" ":"")+this.language.dayNames[e]},t.prototype.plural=function(t){return t%100!=1},t.prototype.add=function(t){return this.text.push(" "),this.text.push(t),this},t.prototype.list=function(t,e,n,r){var i=this;void 0===r&&(r=","),s(t)||(t=[t]);e=e||function(t){return t.toString()};var o=function(t){return e&&e.call(i,t)};return 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this.accept("number")},t.prototype.expect=function(t){if(this.accept(t))return!0;throw new Error("expected "+t+" but found "+this.symbol)},t}();function G(t,e){void 0===e&&(e=P);var n={},r=new X(e.tokens);return r.start(t)?(function(){r.expect("every");var t=r.acceptNumber();t&&(n.interval=parseInt(t[0],10));if(r.isDone())throw new Error("Unexpected end");switch(r.symbol){case"day(s)":n.freq=Pt.DAILY,r.nextSymbol()&&(o(),h());break;case"weekday(s)":n.freq=Pt.WEEKLY,n.byweekday=[Pt.MO,Pt.TU,Pt.WE,Pt.TH,Pt.FR],r.nextSymbol(),o(),h();break;case"week(s)":n.freq=Pt.WEEKLY,r.nextSymbol()&&(i(),o(),h());break;case"hour(s)":n.freq=Pt.HOURLY,r.nextSymbol()&&(i(),h());break;case"minute(s)":n.freq=Pt.MINUTELY,r.nextSymbol()&&(i(),h());break;case"month(s)":n.freq=Pt.MONTHLY,r.nextSymbol()&&(i(),h());break;case"year(s)":n.freq=Pt.YEARLY,r.nextSymbol()&&(i(),h());break;case"monday":case"tuesday":case"wednesday":case"thursday":case"friday":case"saturday":case"sunday":n.freq=Pt.WEEKLY;var e=r.symbol.substr(0,2).toUpperCase();if(n.byweekday=[Pt[e]],!r.nextSymbol())return;for(;r.accept("comma");){if(r.isDone())throw new Error("Unexpected end");var y=s();if(!y)throw new Error("Unexpected symbol "+r.symbol+", expected weekday");n.byweekday.push(Pt[y]),r.nextSymbol()}o(),function(){r.accept("on"),r.accept("the");var t=u();if(!t)return;n.bymonthday=[t],r.nextSymbol();for(;r.accept("comma");){if(!(t=u()))throw new Error("Unexpected symbol "+r.symbol+"; expected monthday");n.bymonthday.push(t),r.nextSymbol()}}(),h();break;case"january":case"february":case"march":case"april":case"may":case"june":case"july":case"august":case"september":case"october":case"november":case"december":if(n.freq=Pt.YEARLY,n.bymonth=[a()],!r.nextSymbol())return;for(;r.accept("comma");){if(r.isDone())throw new Error("Unexpected end");var c=a();if(!c)throw new Error("Unexpected symbol "+r.symbol+", expected month");n.bymonth.push(c),r.nextSymbol()}i(),h();break;default:throw new Error("Unknown symbol")}}(),n):null;function i(){var t=r.accept("on"),e=r.accept("the");if(t||e)do{var i=u(),o=s(),h=a();if(i)o?(r.nextSymbol(),n.byweekday||(n.byweekday=[]),n.byweekday.push(Pt[o].nth(i))):(n.bymonthday||(n.bymonthday=[]),n.bymonthday.push(i),r.accept("day(s)"));else if(o)r.nextSymbol(),n.byweekday||(n.byweekday=[]),n.byweekday.push(Pt[o]);else if("weekday(s)"===r.symbol)r.nextSymbol(),n.byweekday||(n.byweekday=[Pt.MO,Pt.TU,Pt.WE,Pt.TH,Pt.FR]);else if("week(s)"===r.symbol){r.nextSymbol();var y=r.acceptNumber();if(!y)throw new Error("Unexpected symbol "+r.symbol+", expected week number");for(n.byweekno=[parseInt(y[0],10)];r.accept("comma");){if(!(y=r.acceptNumber()))throw new Error("Unexpected symbol "+r.symbol+"; expected monthday");n.byweekno.push(parseInt(y[0],10))}}else{if(!h)return;r.nextSymbol(),n.bymonth||(n.bymonth=[]),n.bymonth.push(h)}}while(r.accept("comma")||r.accept("the")||r.accept("on"))}function o(){if(r.accept("at"))do{var t=r.acceptNumber();if(!t)throw new 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this.yearinfo.yearordinal},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"mrange",{get:function(){return this.yearinfo.mrange},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"wdaymask",{get:function(){return this.yearinfo.wdaymask},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"mmask",{get:function(){return this.yearinfo.mmask},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"wnomask",{get:function(){return this.yearinfo.wnomask},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"nwdaymask",{get:function(){return this.monthinfo?this.monthinfo.nwdaymask:[]},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"nextyearlen",{get:function(){return this.yearinfo.nextyearlen},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"mdaymask",{get:function(){return this.yearinfo.mdaymask},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"nmdaymask",{get:function(){return this.yearinfo.nmdaymask},enumerable:!1,configurable:!0}),t.prototype.ydayset=function(){return[u(this.yearlen),0,this.yearlen]},t.prototype.mdayset=function(t,e){for(var n=this.mrange[e-1],r=this.mrange[e],i=h(null,this.yearlen),o=n;o<r;o++)i[o]=o;return[i,n,r]},t.prototype.wdayset=function(t,e,n){for(var r=h(null,this.yearlen+7),i=x(b(t,e,n))-this.yearordinal,o=i,a=0;a<7&&(r[i]=i,++i,this.wdaymask[i]!==this.options.wkst);a++);return[r,o,i]},t.prototype.ddayset=function(t,e,n){var r=h(null,this.yearlen),i=x(b(t,e,n))-this.yearordinal;return r[i]=i,[r,i,i+1]},t.prototype.htimeset=function(t,e,n,r){var i=this,o=[];return this.options.byminute.forEach((function(e){o=o.concat(i.mtimeset(t,e,n,r))})),_(o),o},t.prototype.mtimeset=function(t,e,n,r){var i=this.options.bysecond.map((function(n){return new tt(t,e,n,r)}));return _(i),i},t.prototype.stimeset=function(t,e,n,r){return[new tt(t,e,n,r)]},t.prototype.getdayset=function(t){switch(t){case Z.YEARLY:return this.ydayset.bind(this);case Z.MONTHLY:return this.mdayset.bind(this);case Z.WEEKLY:return this.wdayset.bind(this);case Z.DAILY:default:return this.ddayset.bind(this)}},t.prototype.gettimeset=function(t){switch(t){case Z.HOURLY:return this.htimeset.bind(this);case Z.MINUTELY:return this.mtimeset.bind(this);case Z.SECONDLY:return this.stimeset.bind(this)}},t}();function Rt(t,e,n,r,o,a){for(var s=[],u=0;u<t.length;u++){var h=void 0,y=void 0,d=t[u];d<0?(h=Math.floor(d/e.length),y=c(d,e.length)):(h=Math.floor((d-1)/e.length),y=c(d-1,e.length));for(var l=[],f=n;f<r;f++){var b=a[f];i(b)&&l.push(b)}var m=void 0;m=h<0?l.slice(h)[0]:l[h];var w=e[y],v=D(o.yearordinal+m),g=Y(v,w);p(s,g)||s.push(g)}return _(s),s}function Nt(t,e){var n=e.dtstart,r=e.freq,o=e.interval,a=e.until,s=e.bysetpos,u=e.count;if(0===u||0===o)return It(t);var h=et.fromDate(n),y=new _t(e);y.rebuild(h.year,h.month);for(var c=function(t,e,n){var r=n.freq,i=n.byhour,o=n.byminute,a=n.bysecond;if(Q(r))return function(t){var e=t.dtstart.getTime()%1e3;if(!Q(t.freq))return[];var n=[];return t.byhour.forEach((function(r){t.byminute.forEach((function(i){t.bysecond.forEach((function(t){n.push(new tt(r,i,t,e))}))}))})),n}(n);if(r>=Pt.HOURLY&&f(i)&&!p(i,e.hour)||r>=Pt.MINUTELY&&f(o)&&!p(o,e.minute)||r>=Pt.SECONDLY&&f(a)&&!p(a,e.second))return[];return t.gettimeset(r)(e.hour,e.minute,e.second,e.millisecond)}(y,h,e);;){var d=y.getdayset(r)(h.year,h.month,h.day),l=d[0],b=d[1],m=d[2],w=jt(l,b,m,y,e);if(f(s))for(var v=Rt(s,c,b,m,y,l),g=0;g<v.length;g++){var k=v[g];if(a&&k>a)return It(t);if(k>=n){var E=Ct(k,e);if(!t.accept(E))return It(t);if(u&&!--u)return It(t)}}else for(g=b;g<m;g++){var T=l[g];if(i(T))for(var x=D(y.yearordinal+T),O=0;O<c.length;O++){var S=c[O];k=Y(x,S);if(a&&k>a)return It(t);if(k>=n){E=Ct(k,e);if(!t.accept(E))return It(t);if(u&&!--u)return It(t)}}}if(0===e.interval)return It(t);if(h.add(e,w),h.year>9999)return It(t);Q(r)||(c=y.gettimeset(r)(h.hour,h.minute,h.second,0)),y.rebuild(h.year,h.month)}}function At(t,e,n){var r=n.bymonth,i=n.byweekno,o=n.byweekday,a=n.byeaster,s=n.bymonthday,u=n.bynmonthday,h=n.byyearday;return f(r)&&!p(r,t.mmask[e])||f(i)&&!t.wnomask[e]||f(o)&&!p(o,t.wdaymask[e])||f(t.nwdaymask)&&!t.nwdaymask[e]||null!==a&&!p(t.eastermask,e)||(f(s)||f(u))&&!p(s,t.mdaymask[e])&&!p(u,t.nmdaymask[e])||f(h)&&(e<t.yearlen&&!p(h,e+1)&&!p(h,-t.yearlen+e)||e>=t.yearlen&&!p(h,e+1-t.yearlen)&&!p(h,-t.nextyearlen+e-t.yearlen))}function Ct(t,e){return new ht(t,e.tzid).rezonedDate()}function It(t){return t.getValue()}function jt(t,e,n,r,i){for(var o=!1,a=e;a<n;a++){var s=t[a];(o=At(r,s,i))&&(t[s]=null)}return o}var Wt={MO:new r(0),TU:new r(1),WE:new r(2),TH:new r(3),FR:new r(4),SA:new r(5),SU:new r(6)},Ht={freq:Z.YEARLY,dtstart:null,interval:1,wkst:Wt.MO,count:null,until:null,tzid:null,bysetpos:null,bymonth:null,bymonthday:null,bynmonthday:null,byyearday:null,byweekno:null,byweekday:null,bynweekday:null,byhour:null,byminute:null,bysecond:null,byeaster:null},qt=Object.keys(Ht),Pt=function(){function t(t,e){void 0===t&&(t={}),void 0===e&&(e=!1),this._cache=e?null:new lt,this.origOptions=nt(t);var n=rt(t).parsedOptions;this.options=n}return t.parseText=function(t,e){return G(t,e)},t.fromText=function(t,e){return $(t,e)},t.fromString=function(e){return new t(t.parseString(e)||void 0)},t.prototype._iter=function(t){return Nt(t,this.options)},t.prototype._cacheGet=function(t,e){return!!this._cache&&this._cache._cacheGet(t,e)},t.prototype._cacheAdd=function(t,e,n){if(this._cache)return this._cache._cacheAdd(t,e,n)},t.prototype.all=function(t){if(t)return this._iter(new q("all",{},t));var e=this._cacheGet("all");return!1===e&&(e=this._iter(new C("all",{})),this._cacheAdd("all",e)),e},t.prototype.between=function(t,e,n,r){if(void 0===n&&(n=!1),!T(t)||!T(e))throw new Error("Invalid date passed in to RRule.between");var i={before:e,after:t,inc:n};if(r)return this._iter(new q("between",i,r));var o=this._cacheGet("between",i);return!1===o&&(o=this._iter(new C("between",i)),this._cacheAdd("between",o,i)),o},t.prototype.before=function(t,e){if(void 0===e&&(e=!1),!T(t))throw new Error("Invalid date passed in to RRule.before");var n={dt:t,inc:e},r=this._cacheGet("before",n);return!1===r&&(r=this._iter(new C("before",n)),this._cacheAdd("before",r,n)),r},t.prototype.after=function(t,e){if(void 0===e&&(e=!1),!T(t))throw new Error("Invalid date passed in to RRule.after");var n={dt:t,inc:e},r=this._cacheGet("after",n);return!1===r&&(r=this._iter(new C("after",n)),this._cacheAdd("after",r,n)),r},t.prototype.count=function(){return this.all().length},t.prototype.toString=function(){return yt(this.origOptions)},t.prototype.toText=function(t,e,n){return function(t,e,n,r){return new B(t,e,n,r).toString()}(this,t,e,n)},t.prototype.isFullyConvertibleToText=function(){return V(this)},t.prototype.clone=function(){return new t(this.origOptions)},t.FREQUENCIES=["YEARLY","MONTHLY","WEEKLY","DAILY","HOURLY","MINUTELY","SECONDLY"],t.YEARLY=Z.YEARLY,t.MONTHLY=Z.MONTHLY,t.WEEKLY=Z.WEEKLY,t.DAILY=Z.DAILY,t.HOURLY=Z.HOURLY,t.MINUTELY=Z.MINUTELY,t.SECONDLY=Z.SECONDLY,t.MO=Wt.MO,t.TU=Wt.TU,t.WE=Wt.WE,t.TH=Wt.TH,t.FR=Wt.FR,t.SA=Wt.SA,t.SU=Wt.SU,t.parseString=it,t.optionsToString=yt,t}();var Ft={dtstart:null,cache:!1,unfold:!1,forceset:!1,compatible:!1,tzid:null};function zt(t,e){var n=[],r=[],i=[],o=[],a=ot(t),s=a.dtstart,u=a.tzid,h=function(t,e){void 0===e&&(e=!1);if(!(t=t&&t.trim()))throw new Error("Invalid empty string");if(!e)return t.split(/\\s/);var n=t.split("\\n"),r=0;for(;r<n.length;){var i=n[r]=n[r].replace(/\\s+$/g,"");i?r>0&&" "===i[0]?(n[r-1]+=i.slice(1),n.splice(r,1)):r+=1:n.splice(r,1)}return n}(t,e.unfold);return h.forEach((function(t){var e;if(t){var a=function(t){var e=function(t){if(-1===t.indexOf(":"))return{name:"RRULE",value:t};var e=(i=t,o=":",a=1,s=i.split(o),a?s.slice(0,a).concat([s.slice(a).join(o)]):s),n=e[0],r=e[1];var i,o,a,s;return{name:n,value:r}}(t),n=e.name,r=e.value,i=n.split(";");if(!i)throw new Error("empty property name");return{name:i[0].toUpperCase(),parms:i.slice(1),value:r}}(t),s=a.name,h=a.parms,y=a.value;switch(s.toUpperCase()){case"RRULE":if(h.length)throw new Error("unsupported RRULE parm: ".concat(h.join(",")));n.push(it(t));break;case"RDATE":var c=(null!==(e=/RDATE(?:;TZID=([^:=]+))?/i.exec(t))&&void 0!==e?e:[])[1];c&&!u&&(u=c),r=r.concat(Zt(y,h));break;case"EXRULE":if(h.length)throw new Error("unsupported EXRULE parm: ".concat(h.join(",")));i.push(it(y));break;case"EXDATE":o=o.concat(Zt(y,h));break;case"DTSTART":break;default:throw new Error("unsupported property: "+s)}}})),{dtstart:s,tzid:u,rrulevals:n,rdatevals:r,exrulevals:i,exdatevals:o}}function Kt(t,e){return void 0===e&&(e={}),function(t,e){var n=zt(t,e),r=n.rrulevals,i=n.rdatevals,o=n.exrulevals,a=n.exdatevals,s=n.dtstart,u=n.tzid,h=!1===e.cache;if(e.compatible&&(e.forceset=!0,e.unfold=!0),e.forceset||r.length>1||i.length||o.length||a.length){var y=new Gt(h);return y.dtstart(s),y.tzid(u||void 0),r.forEach((function(t){y.rrule(new Pt(Bt(t,s,u),h))})),i.forEach((function(t){y.rdate(t)})),o.forEach((function(t){y.exrule(new Pt(Bt(t,s,u),h))})),a.forEach((function(t){y.exdate(t)})),e.compatible&&e.dtstart&&y.rdate(s),y}var c=r[0]||{};return new Pt(Bt(c,c.dtstart||e.dtstart||s,c.tzid||e.tzid||u),h)}(t,function(t){var e=[],n=Object.keys(t),r=Object.keys(Ft);if(n.forEach((function(t){p(r,t)||e.push(t)})),e.length)throw new Error("Invalid options: "+e.join(", "));return W(W({},Ft),t)}(e))}function Bt(t,e,n){return W(W({},t),{dtstart:e,tzid:n})}function Zt(t,e){return function(t){t.forEach((function(t){if(!/(VALUE=DATE(-TIME)?)|(TZID=)/.test(t))throw new Error("unsupported RDATE/EXDATE parm: "+t)}))}(e),t.split(",").map((function(t){return N(t)}))}function Xt(t){var e=this;return function(n){if(void 0!==n&&(e["_".concat(t)]=n),void 0!==e["_".concat(t)])return e["_".concat(t)];for(var r=0;r<e._rrule.length;r++){var i=e._rrule[r].origOptions[t];if(i)return i}}}var Gt=function(t){function e(e){void 0===e&&(e=!1);var n=t.call(this,{},e)||this;return n.dtstart=Xt.apply(n,["dtstart"]),n.tzid=Xt.apply(n,["tzid"]),n._rrule=[],n._rdate=[],n._exrule=[],n._exdate=[],n}return j(e,t),e.prototype._iter=function(t){return function(t,e,n,r,i,o){var a={},s=t.accept;function u(t,e){n.forEach((function(n){n.between(t,e,!0).forEach((function(t){a[Number(t)]=!0}))}))}i.forEach((function(t){var e=new ht(t,o).rezonedDate();a[Number(e)]=!0})),t.accept=function(t){var e=Number(t);return isNaN(e)?s.call(this,t):!(!a[e]&&(u(new Date(e-1),new Date(e+1)),!a[e]))||(a[e]=!0,s.call(this,t))},"between"===t.method&&(u(t.args.after,t.args.before),t.accept=function(t){var e=Number(t);return!!a[e]||(a[e]=!0,s.call(this,t))});for(var h=0;h<r.length;h++){var y=new ht(r[h],o).rezonedDate();if(!t.accept(new Date(y.getTime())))break}e.forEach((function(e){Nt(t,e.options)}));var c=t._result;switch(_(c),t.method){case"all":case"between":return c;case"before":return c.length&&c[c.length-1]||null;default:return c.length&&c[0]||null}}(t,this._rrule,this._exrule,this._rdate,this._exdate,this.tzid())},e.prototype.rrule=function(t){Qt(t,this._rrule)},e.prototype.exrule=function(t){Qt(t,this._exrule)},e.prototype.rdate=function(t){$t(t,this._rdate)},e.prototype.exdate=function(t){$t(t,this._exdate)},e.prototype.rrules=function(){return this._rrule.map((function(t){return Kt(t.toString())}))},e.prototype.exrules=function(){return this._exrule.map((function(t){return Kt(t.toString())}))},e.prototype.rdates=function(){return this._rdate.map((function(t){return new Date(t.getTime())}))},e.prototype.exdates=function(){return this._exdate.map((function(t){return new Date(t.getTime())}))},e.prototype.valueOf=function(){var t=[];return!this._rrule.length&&this._dtstart&&(t=t.concat(yt({dtstart:this._dtstart}))),this._rrule.forEach((function(e){t=t.concat(e.toString().split("\\n"))})),this._exrule.forEach((function(e){t=t.concat(e.toString().split("\\n").map((function(t){return t.replace(/^RRULE:/,"EXRULE:")})).filter((function(t){return!/^DTSTART/.test(t)})))})),this._rdate.length&&t.push(Jt("RDATE",this._rdate,this.tzid())),this._exdate.length&&t.push(Jt("EXDATE",this._exdate,this.tzid())),t},e.prototype.toString=function(){return this.valueOf().join("\\n")},e.prototype.clone=function(){var t=new e(!!this._cache);return this._rrule.forEach((function(e){return t.rrule(e.clone())})),this._exrule.forEach((function(e){return t.exrule(e.clone())})),this._rdate.forEach((function(e){return t.rdate(new Date(e.getTime()))})),this._exdate.forEach((function(e){return t.exdate(new Date(e.getTime()))})),t},e}(Pt);function Qt(t,e){if(!(t instanceof Pt))throw new TypeError(String(t)+" is not RRule instance");p(e.map(String),String(t))||e.push(t)}function $t(t,e){if(!(t instanceof Date))throw new TypeError(String(t)+" is not Date instance");p(e.map(Number),Number(t))||(e.push(t),_(e))}function Jt(t,e,n){var r=!n||"UTC"===n.toUpperCase(),i=r?"".concat(t,":"):"".concat(t,";TZID=").concat(n,":"),o=e.map((function(t){return R(t.valueOf(),r)})).join(",");return"".concat(i).concat(o)}return e})()));
`);

const RRule = new rrule.RRule();
const RRuleStr = rrule.rrulestr;