React Timeline Block Past Event Creation

Sometimes we don't want users to be able to create events in the past or to alter past events. This might be role based in some cases or applied in general to the calendar.

To disable past event creation and manipulation, a couple of things need to be handled:

  • Invalidate dates that are before today - this takes care of validating event drop and event creation on past dates
  • Mark past events as fixed - to do this, set the editable property of the event object to false for the events that should remain fixed
  • Handle past occurrences of recurring events - recurring events are loaded as a single event and the occurrences are generated by the timeline. Moving the past occurrences need to be handled in the onEventUpdate and onEventCreate lifecycle events
  • Give feedback to the user - optionally, a toast can be displayed to give feedback to the user why an event cannot be dropped, moved and created in the past. For this we can use the onEventCreateFailed and onEventUpdateFailed lifecycle events
Get started with this example

Demo

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Keep past dates read-only on a resource timeline — block creation, moving, and resizing, and show a toast for blocked actions.

Code

View code on GitHub 
import { Eventcalendar, getJson, setOptions, Toast  } from '@mobiscroll/react';
import { useCallback, useEffect, useMemo, useState } from 'react';

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

const now = new Date(new Date().setMinutes(59));
const today = new Date(now.getFullYear(), now.getMonth(), now.getDate());
const yesterday = new Date(now.getFullYear(), now.getMonth(), now.getDate() - 1);

function App() {
  const [myEvents, setEvents] = useState([]);
  const [isToastOpen, setToastOpen] = useState(false);
  const [toastMessage, setToastMessage] = useState();

  const myInvalid = useMemo(() => [{ recurring: { repeat: 'daily', until: yesterday } }, { start: today, end: now }], []);
  const myResources = useMemo(
    () => [
      { id: 1, name: 'Resource A', color: '#e20000' },
      { id: 2, name: 'Resource B', color: '#76e083' },
      { id: 3, name: 'Resource C', color: '#4981d6' },
      { id: 4, name: 'Resource D', color: '#e25dd2' },
      { id: 5, name: 'Resource E', color: '#1dab2f' },
      { id: 6, name: 'Resource F', color: '#d6d145' },
    ],
    [],
  );

  const myView = useMemo(() => ({ timeline: { type: 'month' } }), []);

  const handleEventCreateFailed = useCallback((args) => {
    if (!args.originEvent) {
      setToastMessage("Can't create event in the past");
      setToastOpen(true);
    }
  }, []);

  const handleEventUpdateFailed = useCallback((args) => {
    if (!args.oldEventOccurrence) {
      setToastMessage("Can't move event in the past");
      setToastOpen(true);
    }
  }, []);

  const handleEventCreate = useCallback((args) => {
    const oldEvent = args.originEvent;
    const start = oldEvent && oldEvent.start ? oldEvent.start : null;

    // Handle recurring events
    if (start && start < today) {
      setToastMessage("Can't move past event");
      setToastOpen(true);
      return false;
    }
  }, []);

  const handleEventUpdate = useCallback((args) => {
    const oldEvent = args.oldEvent;
    const start = oldEvent && oldEvent.start ? oldEvent.start : null;
    const oldEventOccurrence = args.oldEventOccurrence;
    const occurrenceStart = oldEventOccurrence && oldEventOccurrence.start ? oldEventOccurrence.start : null;

    // Handle recurring events
    if ((start && start < today) || (occurrenceStart && occurrenceStart < today)) {
      return false;
    }
  }, []);

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

  useEffect(() => {
    getJson(
      'https://trial.mobiscroll.com/multiday-events/',
      (events) => {
        for (const event of events) {
          // Convert dates to date objects
          event.start = event.start ? new Date(event.start) : event.start;
          event.end = event.end ? new Date(event.end) : event.end;
          // Mark past events as fixed by setting the event.editable property to false
          event.editable = event.start && today < event.start;
        }
        setEvents(events);
      },
      'jsonp',
    );
  }, []);

  return (
    <>
      <Eventcalendar
        className="md-disallow-past-event-creation"
        view={myView}
        data={myEvents}
        resources={myResources}
        invalid={myInvalid}
        clickToCreate={true}
        dragToCreate={true}
        dragToMove={true}
        dragToResize={true}
        onEventCreateFailed={handleEventCreateFailed}
        onEventUpdateFailed={handleEventUpdateFailed}
        onEventCreate={handleEventCreate}
        onEventUpdate={handleEventUpdate}
      />
      <Toast message={toastMessage} isOpen={isToastOpen} onClose={handleCloseToast} />
    </>
  );
}

export default App;

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