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<?php
namespace Sabre\VObject;
/**
* A node is the root class for every element in an iCalendar of vCard object.
*
* @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable {
/**
* The following constants are used by the validate() method.
*
* If REPAIR is set, the validator will attempt to repair any broken data
* (if possible).
*/
const REPAIR = 1;
/**
* If this option is set, the validator will operate on the vcards on the
* assumption that the vcards need to be valid for CardDAV.
*
* This means for example that the UID is required, whereas it is not for
* regular vcards.
*/
const PROFILE_CARDDAV = 2;
/**
* If this option is set, the validator will operate on iCalendar objects
* on the assumption that the vcards need to be valid for CalDAV.
*
* This means for example that calendars can only contain objects with
* identical component types and UIDs.
*/
const PROFILE_CALDAV = 4;
/**
* Reference to the parent object, if this is not the top object.
*
* @var Node
*/
public $parent;
/**
* Iterator override
*
* @var ElementList
*/
protected $iterator = null;
/**
* The root document
*
* @var Component
*/
protected $root;
/**
* Serializes the node into a mimedir format
*
* @return string
*/
abstract public function serialize();
/**
* This method returns an array, with the representation as it should be
* encoded in json. This is used to create jCard or jCal documents.
*
* @return array
*/
abstract public function jsonSerialize();
/* {{{ IteratorAggregator interface */
/**
* Returns the iterator for this object
*
* @return ElementList
*/
public function getIterator() {
if (!is_null($this->iterator))
return $this->iterator;
return new ElementList(array($this));
}
/**
* Sets the overridden iterator
*
* Note that this is not actually part of the iterator interface
*
* @param ElementList $iterator
* @return void
*/
public function setIterator(ElementList $iterator) {
$this->iterator = $iterator;
}
/**
* Validates the node for correctness.
*
* The following options are supported:
* Node::REPAIR - May attempt to automatically repair the problem.
*
* This method returns an array with detected problems.
* Every element has the following properties:
*
* * level - problem level.
* * message - A human-readable string describing the issue.
* * node - A reference to the problematic node.
*
* The level means:
* 1 - The issue was repaired (only happens if REPAIR was turned on)
* 2 - An inconsequential issue
* 3 - A severe issue.
*
* @param int $options
* @return array
*/
public function validate($options = 0) {
return array();
}
/* }}} */
/* {{{ Countable interface */
/**
* Returns the number of elements
*
* @return int
*/
public function count() {
$it = $this->getIterator();
return $it->count();
}
/* }}} */
/* {{{ ArrayAccess Interface */
/**
* Checks if an item exists through ArrayAccess.
*
* This method just forwards the request to the inner iterator
*
* @param int $offset
* @return bool
*/
public function offsetExists($offset) {
$iterator = $this->getIterator();
return $iterator->offsetExists($offset);
}
/**
* Gets an item through ArrayAccess.
*
* This method just forwards the request to the inner iterator
*
* @param int $offset
* @return mixed
*/
public function offsetGet($offset) {
$iterator = $this->getIterator();
return $iterator->offsetGet($offset);
}
/**
* Sets an item through ArrayAccess.
*
* This method just forwards the request to the inner iterator
*
* @param int $offset
* @param mixed $value
* @return void
*/
public function offsetSet($offset, $value) {
$iterator = $this->getIterator();
$iterator->offsetSet($offset,$value);
// @codeCoverageIgnoreStart
//
// This method always throws an exception, so we ignore the closing
// brace
}
// @codeCoverageIgnoreEnd
/**
* Sets an item through ArrayAccess.
*
* This method just forwards the request to the inner iterator
*
* @param int $offset
* @return void
*/
public function offsetUnset($offset) {
$iterator = $this->getIterator();
$iterator->offsetUnset($offset);
// @codeCoverageIgnoreStart
//
// This method always throws an exception, so we ignore the closing
// brace
}
// @codeCoverageIgnoreEnd
/* }}} */
}

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