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Component.php
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Component.php
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<?php
namespace Sabre\VObject;
/**
* Component
*
* A component represents a group of properties, such as VCALENDAR, VEVENT, or
* VCARD.
*
* @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class Component extends Node {
/**
* Component name.
*
* This will contain a string such as VEVENT, VTODO, VCALENDAR, VCARD.
*
* @var string
*/
public $name;
/**
* A list of properties and/or sub-components.
*
* @var array
*/
public $children = array();
/**
* Creates a new component.
*
* You can specify the children either in key=>value syntax, in which case
* properties will automatically be created, or you can just pass a list of
* Component and Property object.
*
* By default, a set of sensible values will be added to the component. For
* an iCalendar object, this may be something like CALSCALE:GREGORIAN. To
* ensure that this does not happen, set $defaults to false.
*
* @param Document $root
* @param string $name such as VCALENDAR, VEVENT.
* @param array $children
* @param bool $defaults
* @return void
*/
function __construct(Document $root, $name, array $children = array(), $defaults = true) {
$this->name = strtoupper($name);
$this->root = $root;
if ($defaults) {
// This is a terribly convoluted way to do this, but this ensures
// that the order of properties as they are specified in both
// defaults and the childrens list, are inserted in the object in a
// natural way.
$list = $this->getDefaults();
$nodes = array();
foreach($children as $key=>$value) {
if ($value instanceof Node) {
if (isset($list[$value->name])) {
unset($list[$value->name]);
}
$nodes[] = $value;
} else {
$list[$key] = $value;
}
}
foreach($list as $key=>$value) {
$this->add($key, $value);
}
foreach($nodes as $node) {
$this->add($node);
}
} else {
foreach($children as $k=>$child) {
if ($child instanceof Node) {
// Component or Property
$this->add($child);
} else {
// Property key=>value
$this->add($k, $child);
}
}
}
}
/**
* Adds a new property or component, and returns the new item.
*
* This method has 3 possible signatures:
*
* add(Component $comp) // Adds a new component
* add(Property $prop) // Adds a new property
* add($name, $value, array $parameters = array()) // Adds a new property
* add($name, array $children = array()) // Adds a new component
* by name.
*
* @return Node
*/
function add($a1, $a2 = null, $a3 = null) {
if ($a1 instanceof Node) {
if (!is_null($a2)) {
throw new \InvalidArgumentException('The second argument must not be specified, when passing a VObject Node');
}
$a1->parent = $this;
$this->children[] = $a1;
return $a1;
} elseif(is_string($a1)) {
$item = $this->root->create($a1, $a2, $a3);
$item->parent = $this;
$this->children[] = $item;
return $item;
} else {
throw new \InvalidArgumentException('The first argument must either be a \\Sabre\\VObject\\Node or a string');
}
}
/**
* This method removes a component or property from this component.
*
* You can either specify the item by name (like DTSTART), in which case
* all properties/components with that name will be removed, or you can
* pass an instance of a property or component, in which case only that
* exact item will be removed.
*
* The removed item will be returned. In case there were more than 1 items
* removed, only the last one will be returned.
*
* @param mixed $item
* @return void
*/
function remove($item) {
if (is_string($item)) {
$children = $this->select($item);
foreach($children as $k=>$child) {
unset($this->children[$k]);
}
return $child;
} else {
foreach($this->children as $k => $child) {
if ($child===$item) {
unset($this->children[$k]);
return $child;
}
}
throw new \InvalidArgumentException('The item you passed to remove() was not a child of this component');
}
}
/**
* Returns an iterable list of children
*
* @return array
*/
function children() {
return $this->children;
}
/**
* This method only returns a list of sub-components. Properties are
* ignored.
*
* @return array
*/
function getComponents() {
$result = array();
foreach($this->children as $child) {
if ($child instanceof Component) {
$result[] = $child;
}
}
return $result;
}
/**
* Returns an array with elements that match the specified name.
*
* This function is also aware of MIME-Directory groups (as they appear in
* vcards). This means that if a property is grouped as "HOME.EMAIL", it
* will also be returned when searching for just "EMAIL". If you want to
* search for a property in a specific group, you can select on the entire
* string ("HOME.EMAIL"). If you want to search on a specific property that
* has not been assigned a group, specify ".EMAIL".
*
* Keys are retained from the 'children' array, which may be confusing in
* certain cases.
*
* @param string $name
* @return array
*/
function select($name) {
$group = null;
$name = strtoupper($name);
if (strpos($name,'.')!==false) {
list($group,$name) = explode('.', $name, 2);
}
$result = array();
foreach($this->children as $key=>$child) {
if (
(
strtoupper($child->name) === $name
&& (is_null($group) || ( $child instanceof Property && strtoupper($child->group) === $group))
)
||
(
$name === '' && $child instanceof Property && strtoupper($child->group) === $group
)
) {
$result[$key] = $child;
}
}
reset($result);
return $result;
}
/**
* Turns the object back into a serialized blob.
*
* @return string
*/
function serialize() {
$str = "BEGIN:" . $this->name . "\r\n";
/**
* Gives a component a 'score' for sorting purposes.
*
* This is solely used by the childrenSort method.
*
* A higher score means the item will be lower in the list.
* To avoid score collisions, each "score category" has a reasonable
* space to accomodate elements. The $key is added to the $score to
* preserve the original relative order of elements.
*
* @param int $key
* @param array $array
* @return int
*/
$sortScore = function($key, $array) {
if ($array[$key] instanceof Component) {
// We want to encode VTIMEZONE first, this is a personal
// preference.
if ($array[$key]->name === 'VTIMEZONE') {
$score=300000000;
return $score+$key;
} else {
$score=400000000;
return $score+$key;
}
} else {
// Properties get encoded first
// VCARD version 4.0 wants the VERSION property to appear first
if ($array[$key] instanceof Property) {
if ($array[$key]->name === 'VERSION') {
$score=100000000;
return $score+$key;
} else {
// All other properties
$score=200000000;
return $score+$key;
}
}
}
};
$tmp = $this->children;
uksort(
$this->children,
function($a, $b) use ($sortScore, $tmp) {
$sA = $sortScore($a, $tmp);
$sB = $sortScore($b, $tmp);
return $sA - $sB;
}
);
foreach($this->children as $child) $str.=$child->serialize();
$str.= "END:" . $this->name . "\r\n";
return $str;
}
/**
* 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
*/
function jsonSerialize() {
$components = array();
$properties = array();
foreach($this->children as $child) {
if ($child instanceof Component) {
$components[] = $child->jsonSerialize();
} else {
$properties[] = $child->jsonSerialize();
}
}
return array(
strtolower($this->name),
$properties,
$components
);
}
/**
* This method should return a list of default property values.
*
* @return array
*/
protected function getDefaults() {
return array();
}
/* Magic property accessors {{{ */
/**
* Using 'get' you will either get a property or component.
*
* If there were no child-elements found with the specified name,
* null is returned.
*
* To use this, this may look something like this:
*
* $event = $calendar->VEVENT;
*
* @param string $name
* @return Property
*/
function __get($name) {
$matches = $this->select($name);
if (count($matches)===0) {
return null;
} else {
$firstMatch = current($matches);
/** @var $firstMatch Property */
$firstMatch->setIterator(new ElementList(array_values($matches)));
return $firstMatch;
}
}
/**
* This method checks if a sub-element with the specified name exists.
*
* @param string $name
* @return bool
*/
function __isset($name) {
$matches = $this->select($name);
return count($matches)>0;
}
/**
* Using the setter method you can add properties or subcomponents
*
* You can either pass a Component, Property
* object, or a string to automatically create a Property.
*
* If the item already exists, it will be removed. If you want to add
* a new item with the same name, always use the add() method.
*
* @param string $name
* @param mixed $value
* @return void
*/
function __set($name, $value) {
$matches = $this->select($name);
$overWrite = count($matches)?key($matches):null;
if ($value instanceof Component || $value instanceof Property) {
$value->parent = $this;
if (!is_null($overWrite)) {
$this->children[$overWrite] = $value;
} else {
$this->children[] = $value;
}
} else {
$property = $this->root->create($name,$value);
$property->parent = $this;
if (!is_null($overWrite)) {
$this->children[$overWrite] = $property;
} else {
$this->children[] = $property;
}
}
}
/**
* Removes all properties and components within this component with the
* specified name.
*
* @param string $name
* @return void
*/
function __unset($name) {
$matches = $this->select($name);
foreach($matches as $k=>$child) {
unset($this->children[$k]);
$child->parent = null;
}
}
/* }}} */
/**
* This method is automatically called when the object is cloned.
* Specifically, this will ensure all child elements are also cloned.
*
* @return void
*/
function __clone() {
foreach($this->children as $key=>$child) {
$this->children[$key] = clone $child;
$this->children[$key]->parent = $this;
}
}
/**
* A simple list of validation rules.
*
* This is simply a list of properties, and how many times they either
* must or must not appear.
*
* Possible values per property:
* * 0 - Must not appear.
* * 1 - Must appear exactly once.
* * + - Must appear at least once.
* * * - Can appear any number of times.
* * ? - May appear, but not more than once.
*
* It is also possible to specify defaults and severity levels for
* violating the rule.
*
* See the VEVENT implementation for getValidationRules for a more complex
* example.
*
* @var array
*/
function getValidationRules() {
return array();
}
/**
* Validates the node for correctness.
*
* The following options are supported:
* Node::REPAIR - May attempt to automatically repair the problem.
* Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
* Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
*
* 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 - A warning.
* 3 - An error.
*
* @param int $options
* @return array
*/
function validate($options = 0) {
$rules = $this->getValidationRules();
$defaults = $this->getDefaults();
$propertyCounters = array();
$messages = array();
foreach($this->children as $child) {
$name = strtoupper($child->name);
if (!isset($propertyCounters[$name])) {
$propertyCounters[$name] = 1;
} else {
$propertyCounters[$name]++;
}
$messages = array_merge($messages, $child->validate($options));
}
foreach($rules as $propName => $rule) {
switch($rule) {
case '0' :
if (isset($propertyCounters[$propName])) {
$messages[] = array(
'level' => 3,
'message' => $propName . ' MUST NOT appear in a ' . $this->name . ' component',
'node' => $this,
);
}
break;
case '1' :
if (!isset($propertyCounters[$propName]) || $propertyCounters[$propName]!==1) {
$repaired = false;
if ($options & self::REPAIR && isset($defaults[$propName])) {
$this->add($propName, $defaults[$propName]);
}
$messages[] = array(
'level' => $repaired?1:3,
'message' => $propName . ' MUST appear exactly once in a ' . $this->name . ' component',
'node' => $this,
);
}
break;
case '+' :
if (!isset($propertyCounters[$propName]) || $propertyCounters[$propName] < 1) {
$messages[] = array(
'level' => 3,
'message' => $propName . ' MUST appear at least once in a ' . $this->name . ' component',
'node' => $this,
);
}
break;
case '*' :
break;
case '?' :
if (isset($propertyCounters[$propName]) && $propertyCounters[$propName] > 1) {
$messages[] = array(
'level' => 3,
'message' => $propName . ' MUST NOT appear more than once in a ' . $this->name . ' component',
'node' => $this,
);
}
break;
}
}
return $messages;
}
}

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