React Event calendar Google Calendar Sync

The event calendar comes with third party calendar integration support through the integration plugin. This needs to be added to the download package or installed separately from a dedicated NPM package.

It includes everything you need to authenticate your users, get their Google calendars and provides functions for CRUD operations. It takes care of loading the events and converts them to the required format so that they can be displayed on the Mobiscroll calendar separately or mixed with other calendars and events.

Customizing the interaction, event workflows, whether the events are read-only is up to you. In this live demo, newly created events will land in the primary calendar of the authenticated user.

This example uses the integration plugin to connect to and load events from Google Calendar and it is not available in the trial. Give the live demo a try and see how it can be configured.
Get started with the event calendar

Demo

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Connect Google Calendar to a event calendar — authenticate users, load events, and sync create, edit, and delete actions to Google Calendar.

Code

View code on GitHub 
import { googleCalendarSync } from '@mobiscroll/calendar-integration';
import {
  Button,
  CalendarNav,
  CalendarNext,
  CalendarPrev,
  CalendarToday,
  Confirm,
  Eventcalendar,
  Page,
  setOptions,
  Switch,
  Toast ,
} from '@mobiscroll/react';
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';

setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

function App() {
  const [myEvents, setEvents] = useState([]);
  const [myCalendars, setCalendars] = useState([]);
  const [calendarIds, setCalendarIds] = useState([]);
  const [calendarData, setCalendarData] = useState([]);
  const [isLoggedIn, setIsLoggedIn] = useState(false);
  const [editable, setEditable] = useState(false);
  const [isLoading, setLoading] = useState(false);
  const [isHidden] = useState(false);
  const [primaryCalendarId, setPrimaryCalendarId] = useState();
  const [isToastOpen, setToastOpen] = useState(false);
  const [toastMessage, setToastMessage] = useState('');
  const [confirmEvent, setConfirmEvent] = useState();
  const [confirmOldEvent, setConfirmOldEvent] = useState();
  const [isUpdateConfirmOpen, setUpdateConfirmOpen] = useState(false);
  const [isDeleteConfirmOpen, setDeleteConfirmOpen] = useState(false);

  const debounce = useRef();
  const startDate = useRef();
  const endDate = useRef();

  const view = useMemo(() => ({ calendar: { labels: true } }), []);

  const handleError = useCallback((resp) => {
    setToastMessage(resp.error ? resp.error : resp.result.error.message);
    setToastOpen(true);
  }, []);

  const handleToastClose = useCallback(() => {
    setToastOpen(false);
  }, []);

  const handleUpdateConfirmClose = useCallback(
    (result) => {
      if (result) {
        const calendarId = confirmEvent.googleCalendarId;
        googleCalendarSync
          .updateEvent(calendarId, confirmEvent)
          .then(() => {
            setToastMessage('Event updated on "' + calendarData[calendarId].name + '" calendar');
            setToastOpen(true);
          })
          .catch((error) => {
            setEvents((oldEvents) => [...oldEvents.filter((item) => item.id !== confirmEvent.id), confirmOldEvent]);
            handleError(error);
          });
      } else {
        setEvents((oldEvents) => [...oldEvents.filter((item) => item.id !== confirmEvent.id), confirmOldEvent]);
      }
      setUpdateConfirmOpen(false);
    },
    [calendarData, confirmEvent, confirmOldEvent, handleError],
  );

  const handleDeleteConfirmClose = useCallback(
    (result) => {
      if (result) {
        const calendarId = confirmEvent.googleCalendarId;
        googleCalendarSync
          .deleteEvent(calendarId, confirmEvent)
          .then(() => {
            setEvents((oldEvents) => oldEvents.filter((item) => item.id !== confirmEvent.id));
            setToastMessage('Event deleted from "' + calendarData[calendarId].name + '" calendar');
            setToastOpen(true);
          })
          .catch(handleError);
      }
      setDeleteConfirmOpen(false);
    },
    [calendarData, confirmEvent, handleError],
  );

  const handlePageLoading = useCallback(
    (args) => {
      clearTimeout(debounce.current);
      startDate.current = args.viewStart;
      endDate.current = args.viewEnd;
      debounce.current = setTimeout(() => {
        if (googleCalendarSync.isSignedIn()) {
          setLoading(true);
          googleCalendarSync
            .getEvents(calendarIds, startDate.current, endDate.current)
            .then((events) => {
              setLoading(false);
              setEvents(events);
            })
            .catch(handleError);
        }
      }, 200);
    },
    [calendarIds, handleError],
  );

  const handleEventCreate = useCallback(
    (args) => {
      if (googleCalendarSync.isSignedIn()) {
        const event = args.event;
        googleCalendarSync
          .addEvent(primaryCalendarId, event)
          .then((newEvent) => {
            newEvent.color = event.color;
            setEvents((oldEvents) => [...oldEvents, newEvent]);
            setToastMessage('Event created in "' + calendarData[primaryCalendarId].name + '" calendar');
            setToastOpen(true);
          })
          .catch((error) => {
            setEvents((oldEvents) => [...oldEvents]);
            handleError(error);
          });
      }
    },
    [calendarData, handleError, primaryCalendarId],
  );

  const handleEventUpdate = useCallback((args) => {
    if (googleCalendarSync.isSignedIn()) {
      setConfirmEvent(args.event);
      setConfirmOldEvent(args.oldEvent);
      setUpdateConfirmOpen(true);
    }
  }, []);

  const handleEventDelete = useCallback((args) => {
    if (googleCalendarSync.isSignedIn()) {
      setConfirmEvent(args.event);
      setDeleteConfirmOpen(true);
    }
    return false;
  }, []);

  const extendDefaultEvent = useCallback(
    () => ({
      color: calendarData[primaryCalendarId].color,
    }),
    [calendarData, primaryCalendarId],
  );

  const signIn = useCallback(() => {
    googleCalendarSync.signIn().catch(handleError);
  }, [handleError]);

  const signOut = useCallback(() => {
    googleCalendarSync.signOut().catch(handleError);
  }, [handleError]);

  const toggleEditing = useCallback((ev) => {
    setEditable(ev.target.checked);
  }, []);

  const toggleCalendar = useCallback(
    (ev) => {
      const checked = ev.target.checked;
      const calendarId = ev.target.value;
      const updatedCalendarData = { ...calendarData, [calendarId]: { ...calendarData[calendarId], checked } };
      const newCalendarIds = checked ? [...calendarIds, calendarId] : calendarIds.filter((id) => id !== calendarId);
      setCalendarData(updatedCalendarData);
      setCalendarIds(newCalendarIds);
      if (newCalendarIds.length === 0) {
        setEvents([]);
        return;
      }
      setLoading(true);
      googleCalendarSync
        .getEvents(newCalendarIds, startDate.current, endDate.current)
        .then((events) => {
          setLoading(false);
          setEvents(events);
        })
        .catch(handleError);
    },
    [calendarData, calendarIds, handleError],
  );

  const renderMyHeader = useCallback(
    () => (
      <>
        <CalendarNav />
        <div className="md-spinner">
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
          <div className="md-spinner-blade"></div>
        </div>
        <div className="md-google-calendar-header">
          <CalendarPrev />
          <CalendarToday />
          <CalendarNext />
        </div>
      </>
    ),
    [],
  );

  useEffect(() => {
    const onSignedIn = () => {
      setIsLoggedIn(true);
      googleCalendarSync
        .getCalendars()
        .then((calendars) => {
          calendars.sort((c) => (c.primary ? -1 : 1));

          const calData = {};
          const primaryCalId = calendars[0].id;

          for (const c of calendars) {
            calData[c.id] = { name: c.summary, color: c.backgroundColor, checked: c.id === primaryCalId };
          }

          setCalendarIds([primaryCalId]);
          setPrimaryCalendarId(primaryCalId);
          setCalendarData(calData);
          setCalendars(calendars);
          setLoading(true);

          return googleCalendarSync.getEvents([primaryCalId], startDate.current, endDate.current);
        })
        .then((events) => {
          setEvents(events);
          setLoading(false);
        })
        .catch(handleError);
    };

    const onSignedOut = () => {
      setIsLoggedIn(false);
      setCalendars([]);
      setCalendarIds([]);
      setCalendarData({});
      setEvents([]);
    };

    // Init google client
    googleCalendarSync.init({
      apiKey: '<YOUR_GOOGLE_API_KEY>',
      clientId: '<YOUR_GOOGLE_CLIENT_ID>',
      onSignedIn: onSignedIn,
      onSignedOut: onSignedOut,
    });
  }, [handleError]);

  return (
    <Page className="md-sync-events-google-cont">
      <div className={'md-sync-events-google-menu ' + (isHidden ? 'mbsc-hidden' : '')}>
        {isLoggedIn ? (
          <div aria-hidden={!isLoggedIn}>
            <div className="mbsc-form-group-inset mbsc-align-center">
              <p className="mbsc-italic mbsc-txt-muted">
                Editing events sync back to your calendar when enabled. You'll be asked for confirmation on every action.
              </p>
            </div>
            <div className="mbsc-form-group-inset">
              <Switch label="Enable editing" checked={editable} onChange={toggleEditing} />
            </div>
            <div className="mbsc-form-group-inset md-sync-events-google-inset">
              <div className="mbsc-form-group-title">My Calendars</div>
              {myCalendars.map((cal) => (
                <Switch label={cal.summary} key={cal.id} value={cal.id} checked={calendarData[cal.id].checked} onChange={toggleCalendar} />
              ))}
            </div>
            <div className="mbsc-form-group-inset">
              <Button className="mbsc-button-block" onClick={signOut}>
                Log out of my account
              </Button>
            </div>
          </div>
        ) : (
          <div aria-hidden={isLoggedIn}>
            <div className="mbsc-form-group-inset mbsc-align-center">
              <p className="mbsc-italic mbsc-txt-muted">Log into your Google account to view and edit your Google Calendar events</p>
              <button className="mbsc-reset md-sync-events-google-button" onClick={signIn}>
                Sign in with Google
              </button>
            </div>
          </div>
        )}
      </div>
      <div className={'md-sync-events-google-calendar ' + (isLoading ? 'md-loading-events' : '')}>
        <div className="md-sync-events-overlay"></div>
        <Eventcalendar
          view={view}
          data={myEvents}
          exclusiveEndDates={true}
          clickToCreate={editable}
          dragToCreate={editable}
          dragToMove={editable}
          dragToResize={editable}
          extendDefaultEvent={extendDefaultEvent}
          renderHeader={renderMyHeader}
          onPageLoading={handlePageLoading}
          onEventCreate={handleEventCreate}
          onEventUpdate={handleEventUpdate}
          onEventDelete={handleEventDelete}
        />
      </div>
      <Toast isOpen={isToastOpen} message={toastMessage} onClose={handleToastClose} />
      <Confirm
        isOpen={isUpdateConfirmOpen}
        title="Are you sure you want to update this event?"
        message="This action will affect your Google Calendar event."
        okText="Update"
        onClose={handleUpdateConfirmClose}
      />
      <Confirm
        isOpen={isDeleteConfirmOpen}
        title="Are you sure you want to delete this event?"
        message="This action will remove the event from your Google Calendar as well."
        okText="Delete"
        onClose={handleDeleteConfirmClose}
      />
    </Page>
  );
}

export default App;

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