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, the different calendars are handled as resources and have their own timeline rows. You can manipulate events in the desired calendars, while read-only calendars are greyed out.

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 timeline

Demo

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Preview in full screen

Load Google Calendar events onto a Timeline — authenticate users, display calendars as resource rows, and sync changes back to Google Calendar.

Code

View code on GitHub 
import { CommonModule } from '@angular/common';
import { Component, ElementRef, NgZone, OnInit, ViewChild } from '@angular/core';
import { FormsModule } from '@angular/forms';
import {
  MbscCalendarEvent,
  MbscEventcalendarOptions,
  MbscModule,
  MbscPopup,
  MbscPopupOptions,
  MbscResource,
  Notifications,
  setOptions ,
} from '@mobiscroll/angular';
import { googleCalendarSync } from '@mobiscroll/calendar-integration';

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

@Component({
  selector: 'app-root', 
  templateUrl: './app.component.html',
  providers: [Notifications],
  standalone: true,
  imports: [CommonModule, FormsModule, MbscModule],
})
export class AppComponent implements OnInit {
  constructor(
    public notify: Notifications,
    public zone: NgZone,
  ) {}

  @ViewChild('popup', { static: false }) popup!: MbscPopup;

  @ViewChild('calButton') anchorElm!: ElementRef;

  myEvents: MbscCalendarEvent[] = [];

  isEditable = false;
  isLoggedIn = false;
  isLoading = false;
  calendarIds: string[] = [];
  myCalendars: any = [];
  readonlyCalendars: string[] = [];
  startDate!: Date;
  endDate!: Date;
  debounce: any;
  calendarData: any = {};
  myResources: MbscResource[] = [];
  myInvalids: any[] = [];
  myAnchor: any;
  selectedDate: any = new Date();

  calendarOptions: MbscEventcalendarOptions = {
    view: {
      timeline: {
        type: 'week',
        eventDisplay: 'fill',
      },
    },
    onPageLoading: (args: any) => {
      this.startDate = args.viewStart;
      this.endDate = args.viewEnd;
      clearTimeout(this.debounce);
      this.debounce = setTimeout(() => {
        if (googleCalendarSync.isSignedIn()) {
          this.isLoading = true;
          googleCalendarSync
            .getEvents(this.calendarIds, this.startDate, this.endDate)
            .then((resp: any) => {
              this.zone.run(() => {
                resp.forEach((event: any) => {
                  event.resource = event.googleCalendarId;
                });
                this.myEvents = resp;
                this.isLoading = false;
              });
            })
            .catch((error: any) => {
              this.onError(error);
            });
        }
      }, 200);
    },
    onEventCreate: (args: any) => {
      if (googleCalendarSync.isSignedIn()) {
        const event = args.event;
        const calendarId = event.resource;
        if (this.readonlyCalendars.indexOf(calendarId) !== -1) {
          this.notify.toast({
            message: 'This calendar is readonly',
          });
        } else {
          googleCalendarSync
            .addEvent(calendarId, event)
            .then((resp: any) => {
              this.zone.run(() => {
                resp.resource = event.resource;
                this.myEvents = [...this.myEvents.filter((item) => item.id !== event.id), resp];
              });
              this.notify.toast({
                message: 'Event created in "' + this.calendarData[calendarId].name + '" calendar',
              });
            })
            .catch((error: any) => {
              this.zone.run(() => {
                this.myEvents = this.myEvents.filter((item) => item.id !== event.id);
                this.onError(error);
              });
            });
        }
      }
    },
    onEventUpdate: (args) => {
      if (googleCalendarSync.isSignedIn()) {
        this.notify
          .confirm({
            title: 'Are you sure you want to update this event?',
            message: 'This action will affect your Google Calendar event.',
            okText: 'Update',
          })
          .then((result) => {
            const event = args.event;
            if (result) {
              const calendarId = event['googleCalendarId'];
              googleCalendarSync
                .updateEvent(calendarId, event)
                .then(() => {
                  this.notify.toast({
                    message: 'Event updated on "' + this.calendarData[calendarId].name + '" calendar',
                  });
                })
                .catch(() => {
                  this.zone.run(() => {
                    this.myEvents = [...this.myEvents.filter((item) => item.id !== event.id), args.oldEvent!];
                  });
                });
            } else {
              this.myEvents = [...this.myEvents.filter((item) => item.id !== event.id), args.oldEvent!];
            }
          });
      }
    },
    onEventDelete: (args) => {
      if (googleCalendarSync.isSignedIn()) {
        this.notify
          .confirm({
            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',
          })
          .then((result) => {
            if (result) {
              const event = args.event;
              const calendarId = event['googleCalendarId'];
              googleCalendarSync
                .deleteEvent(calendarId, event)
                .then(() => {
                  this.zone.run(() => {
                    this.myEvents = this.myEvents.filter((item) => item.id !== event.id);
                  });
                  this.notify.toast({
                    message: 'Event deleted from "' + this.calendarData[calendarId].name + '" calendar',
                  });
                })
                .catch((error: any) => {
                  this.onError(error);
                });
            }
          });
      }
      return false;
    },
  };

  popupOptions: MbscPopupOptions = {
    width: 400,
    touchUi: false,
    showOverlay: false,
    scrollLock: false,
    contentPadding: false,
    display: 'anchored',
  };

  ngOnInit(): void {
    googleCalendarSync.init({
      apiKey: '<YOUR_GOOGLE_API_KEY>',
      clientId: '<YOUR_GOOGLE_CLIENT_ID>',
      onSignedIn: () => {
        this.isLoggedIn = true;
        googleCalendarSync
          .getCalendars()
          .then((calendars: any) => {
            const newCalendarIds = [];
            const newResources = [];
            const readonlyCals = [];

            calendars.sort((a: { isDefaultCalendar: boolean }) => (a.isDefaultCalendar ? -1 : 1));

            for (const c of calendars) {
              newCalendarIds.push(c.id);
              newResources.push({ id: c.id, name: c.summary, color: c.hexColor });
              this.calendarData[c.id] = { name: c.summary, color: c.hexColor, checked: true };
              if (!(c.accessRole === 'writer' || c.accessRole === 'owner')) {
                readonlyCals.push(c.id);
              }
            }

            this.myCalendars = calendars;
            this.calendarIds = newCalendarIds;
            this.myResources = newResources;
            this.readonlyCalendars = readonlyCals;

            this.isLoading = true;
            this.myInvalids = [
              {
                recurring: {
                  repeat: 'daily',
                },
                resource: readonlyCals,
              },
            ];

            googleCalendarSync
              .getEvents(this.calendarIds, this.startDate, this.endDate)
              .then((resp: any) => {
                this.zone.run(() => {
                  resp.forEach((event: any) => {
                    event.resource = event.googleCalendarId;
                  });
                  this.myEvents = resp;
                  this.isLoading = false;
                });
              })
              .catch((error: any) => {
                this.onError(error);
              });
          })
          .catch((error: any) => {
            this.onError(error);
          });
      },
      onSignedOut: () => {
        this.isLoggedIn = false;
        this.popup.close();
        this.myCalendars = [];
        this.calendarIds = [];
        this.calendarData = {};
        this.myEvents = [];
        this.myResources = [];
        this.myInvalids = [];
        this.readonlyCalendars = [];
      },
    });
  }

  onError(error: any): void {
    this.notify.toast({
      message: error || 'An error occured',
    });
  }

  changeEditable(ev: any): void {
    this.isEditable = ev.target.checked;
  }

  toggleCalendars(ev: any, calendarId: string): void {
    const checked = ev.target.checked;
    this.calendarData[calendarId].checked = checked;

    if (checked) {
      const newResource = this.calendarData[calendarId];
      this.myResources = [...this.myResources, { id: calendarId, name: newResource.name, color: newResource.color }];
      this.calendarIds = [...this.calendarIds, calendarId];
    } else {
      this.myResources = this.myResources.filter((r) => r.id !== calendarId);
      this.calendarIds = this.calendarIds.filter((id) => id !== calendarId);
    }

    if (this.calendarIds.length === 0) {
      this.myEvents = [];
      return;
    }

    this.isLoading = true;
    googleCalendarSync
      .getEvents(this.calendarIds, this.startDate, this.endDate)
      .then((resp: any) => {
        this.zone.run(() => {
          resp.forEach((event: any) => {
            event.resource = event.googleCalendarId;
          });
          this.myEvents = resp;
          this.isLoading = false;
        });
      })
      .catch((error: any) => {
        this.onError(error);
      });
  }

  openPopup(): void {
    this.myAnchor = this.anchorElm.nativeElement;
    this.popup.open();
  }

  navigate(): void {
    this.selectedDate = new Date();
  }

  logOut(): void {
    googleCalendarSync.signOut().catch((error: any) => {
      this.onError(error);
    });
  }

  logIn(): void {
    if (!googleCalendarSync.isSignedIn()) {
      googleCalendarSync.signIn().catch((error: any) => {
        this.onError(error);
      });
    }
  }
}

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