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<?php
namespace Studip\Calendar;
/**
* The Studip\Calendar\Owner interface defines methods that classes whose instances own calendars
* shall implement to faciliate permission checks for that calendars.
*/
interface Owner
{
/**
* Retrieves the Owner object for a specified owner-ID.
*
* @param string $owner_id The ID of the owner.
*
* @return Owner|null Either the Owner object if it can be found or null in case
* it cannot be found.
*/
public static function getCalendarOwner(string $owner_id) : ?Owner;
/**
* Determines whether the specified user has read permissions to the calendar.
*
* @param string|null $user_id The ID of the user for which to determine write permissions.
* Defaults to the current user if no user-ID is provided.
*
* @return bool True, if the user has read permissions, false otherwise.
*/
public function isCalendarReadable(?string $user_id = null) : bool;
/**
* Determines whether the specified user has write permissions to the calendar.
*
* @param string|null $user_id The ID of the user for which to determine write permissions.
* Defaults to the current user if no user-ID is provided.
*
* @return bool True, if the user has write permissions, false otherwise.
*/
public function isCalendarWritable(?string $user_id = null) : bool;
}
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