Interface Sabre\CalDAV\Backend\SharingSupport

`extends`	`BackendInterface`

Adds support for sharing features to a CalDAV server.

CalDAV backends that implement this interface, must make the following modifications to getCalendarsForUser:

Return shared calendars for users.
For every calendar, return calendar-resource-uri. This strings is a URI or relative URI reference that must be unique for every calendar, but identical for every instance of the same shared calendar.
For every calendar, you must return a share-access element. This element should contain one of the Sabre\DAV\Sharing\Plugin:ACCESS_* constants and indicates the access level the user has.

Sabre\CalDAV\Backend\SharingSupport extends BackendInterface
- Afterlogic\DAV\CalDAV\Backend\PDO implements SharingSupport
- Sabre\CalDAV\Backend\PDO implements SyncSupport, SubscriptionSupport, SchedulingSupport, SharingSupport
  - Afterlogic\DAV\CalDAV\Backend\PDO implements SharingSupport

Methods
`public`	`updateInvites(mixed $calendarId, Sharee[] $sharees)` Updates the list of shares. Updates the list of shares. Implemented by `Sabre\CalDAV\Backend\PDO::updateInvites()`	#
`public`	`getInvites(mixed $calendarId): Sharee[]` Returns the list of people whom this calendar is shared with. Returns the list of people whom this calendar is shared with. Every item in the returned list must be a Sharee object with at least the following properties set: $href $shareAccess $inviteStatus and optionally: $properties Implemented by `Sabre\CalDAV\Backend\PDO::getInvites()`	#
`public`	`setPublishStatus(mixed $calendarId, bool $value)` Publishes a calendar. Publishes a calendar. Implemented by `Sabre\CalDAV\Backend\PDO::setPublishStatus()` `Afterlogic\DAV\CalDAV\Backend\PDO::setPublishStatus()`	#

Methods inherited from Sabre\CalDAV\Backend\BackendInterface
`getCalendarsForUser(), createCalendar(), updateCalendar(), deleteCalendar(), getCalendarObjects(), getCalendarObject(), getMultipleCalendarObjects(), createCalendarObject(), updateCalendarObject(), deleteCalendarObject(), calendarQuery(), getCalendarObjectByUID()`