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efrain |
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<?php
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/**
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* BENNU - PHP iCalendar library
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* (c) 2005-2006 Ioannis Papaioannou (pj@moodle.org). All rights reserved.
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*
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* Released under the LGPL.
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*
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* See http://bennu.sourceforge.net/ for more information and downloads.
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*
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* @author Ioannis Papaioannou
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
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*/
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class iCalendar_component {
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var $name = NULL;
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var $properties = NULL;
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var $components = NULL;
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var $valid_properties = NULL;
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var $valid_components = NULL;
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/**
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* Added to hold errors from last run of unserialize
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* @var $parser_errors array
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*/
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var $parser_errors = NULL;
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function __construct() {
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// Initialize the components array
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if(empty($this->components)) {
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$this->components = array();
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foreach($this->valid_components as $name) {
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$this->components[$name] = array();
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}
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}
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}
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function get_name() {
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return $this->name;
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}
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function add_property($name, $value = NULL, $parameters = NULL) {
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// Uppercase first of all
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$name = strtoupper($name);
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// Are we trying to add a valid property?
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$xname = false;
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if(!isset($this->valid_properties[$name])) {
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// If not, is it an x-name as per RFC 2445?
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if(!rfc2445_is_xname($name)) {
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return false;
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}
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// Since this is an xname, all components are supposed to allow this property
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$xname = true;
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}
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// Create a property object of the correct class
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if($xname) {
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$property = new iCalendar_property_x;
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$property->set_name($name);
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}
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else {
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$classname = 'iCalendar_property_'.strtolower(str_replace('-', '_', $name));
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$property = new $classname;
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}
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// If $value is NULL, then this property must define a default value.
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if($value === NULL) {
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$value = $property->default_value();
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if($value === NULL) {
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return false;
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}
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}
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// Set this property's parent component to ourselves, because some
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// properties behave differently according to what component they apply to.
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$property->set_parent_component($this->name);
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// Set parameters before value; this helps with some properties which
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// accept a VALUE parameter, and thus change their default value type.
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// The parameters must be valid according to property specifications
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if(!empty($parameters)) {
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foreach($parameters as $paramname => $paramvalue) {
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if(!$property->set_parameter($paramname, $paramvalue)) {
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return false;
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}
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}
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// Some parameters interact among themselves (e.g. ENCODING and VALUE)
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// so make sure that after the dust settles, these invariants hold true
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if(!$property->invariant_holds()) {
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return false;
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}
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}
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// $value MUST be valid according to the property data type
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if(!$property->set_value($value)) {
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return false;
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}
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// Check if the property already exists, and is limited to one occurrance,
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// DON'T overwrite the value - this can be done explicity with set_value() instead.
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if(!$xname && $this->valid_properties[$name] & RFC2445_ONCE && isset($this->properties[$name])) {
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return false;
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}
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else {
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// Otherwise add it to the instance array for this property
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$this->properties[$name][] = $property;
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}
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// Finally: after all these, does the component invariant hold?
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if(!$this->invariant_holds()) {
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// If not, completely undo the property addition
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array_pop($this->properties[$name]);
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if(empty($this->properties[$name])) {
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unset($this->properties[$name]);
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}
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return false;
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}
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return true;
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}
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function add_component($component) {
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// With the detailed interface, you can add only components with this function
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if(!is_object($component) || !is_subclass_of($component, 'iCalendar_component')) {
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return false;
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}
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$name = $component->get_name();
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// Only valid components as specified by this component are allowed
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if(!in_array($name, $this->valid_components)) {
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return false;
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}
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// Add it
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$this->components[$name][] = $component;
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return true;
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}
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function get_property_list($name) {
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}
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function invariant_holds() {
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return true;
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}
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function is_valid() {
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// If we have any child components, check that they are all valid
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if(!empty($this->components)) {
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foreach($this->components as $component => $instances) {
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foreach($instances as $number => $instance) {
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if(!$instance->is_valid()) {
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return false;
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}
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}
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}
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}
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// Finally, check the valid property list for any mandatory properties
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// that have not been set and do not have a default value
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foreach($this->valid_properties as $property => $propdata) {
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if(($propdata & RFC2445_REQUIRED) && empty($this->properties[$property])) {
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$classname = 'iCalendar_property_'.strtolower(str_replace('-', '_', $property));
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$object = new $classname;
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if($object->default_value() === NULL) {
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return false;
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}
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unset($object);
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}
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}
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return true;
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}
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function serialize() {
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// Check for validity of the object
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if(!$this->is_valid()) {
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return false;
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}
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// Maybe the object is valid, but there are some required properties that
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// have not been given explicit values. In that case, set them to defaults.
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foreach($this->valid_properties as $property => $propdata) {
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if(($propdata & RFC2445_REQUIRED) && empty($this->properties[$property])) {
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$this->add_property($property);
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}
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}
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// Start tag
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$string = rfc2445_fold('BEGIN:'.$this->name) . RFC2445_CRLF;
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// List of properties
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if(!empty($this->properties)) {
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foreach($this->properties as $name => $properties) {
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foreach($properties as $property) {
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$string .= $property->serialize();
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}
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}
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}
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// List of components
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if(!empty($this->components)) {
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foreach($this->components as $name => $components) {
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foreach($components as $component) {
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$string .= $component->serialize();
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}
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}
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}
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// End tag
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$string .= rfc2445_fold('END:'.$this->name) . RFC2445_CRLF;
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return $string;
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}
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/**
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* unserialize()
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*
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* I needed a way to convert an iCalendar component back to a Bennu object so I could
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* easily access and modify it after it had been stored; if this functionality is already
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* present somewhere in the library, I apologize for adding it here unnecessarily; however,
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* I couldn't find it so I added it myself.
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* @param string $string the iCalendar object to load in to this iCalendar_component
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* @return bool true if the file parsed with no errors. False if there were errors.
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*/
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function unserialize($string) {
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$string = rfc2445_unfold($string); // Unfold any long lines
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$lines = preg_split("<".RFC2445_CRLF."|\n|\r>", $string, 0, PREG_SPLIT_NO_EMPTY); // Create an array of lines.
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$components = array(); // Initialise a stack of components
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$this->clear_errors();
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foreach ($lines as $key => $line) {
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// ignore empty lines
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if (trim($line) == '') {
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continue;
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}
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// Divide the line up into label, parameters and data fields.
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if (!preg_match('#^(?P<label>[-[:alnum:]]+)(?P<params>(?:;(?:(?:[-[:alnum:]]+)=(?:[^[:cntrl:]";:,]+|"[^[:cntrl:]"]+")))*):(?P<data>.*)$#', $line, $match)) {
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$this->parser_error('Invalid line: '.$key.', ignoring');
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continue;
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}
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// parse parameters
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$params = array();
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if (preg_match_all('#;(?P<param>[-[:alnum:]]+)=(?P<value>[^[:cntrl:]";:,]+|"[^[:cntrl:]"]+")#', $match['params'], $pmatch)) {
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$params = array_combine($pmatch['param'], $pmatch['value']);
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}
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$label = $match['label'];
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$data = $match['data'];
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unset($match, $pmatch);
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if ($label == 'BEGIN') {
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// This is the start of a component.
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$current_component = array_pop($components); // Get the current component off the stack so we can check its valid components
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if ($current_component == null) { // If there's nothing on the stack
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$current_component = $this; // use the iCalendar
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}
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if (in_array($data, $current_component->valid_components)) { // Check that the new component is a valid subcomponent of the current one
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if($current_component != $this) {
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array_push($components, $current_component); // We're done with the current component, put it back on the stack.
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}
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if(strpos($data, 'V') === 0) {
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$data = substr($data, 1);
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}
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$cname = 'iCalendar_' . strtolower($data);
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$new_component = new $cname;
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array_push($components, $new_component); // Push a new component onto the stack
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} else {
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if($current_component != $this) {
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array_push($components, $current_component);
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$this->parser_error('Invalid component type on line '.$key);
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}
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}
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unset($current_component, $new_component);
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} else if ($label == 'END') {
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// It's the END of a component.
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$component = array_pop($components); // Pop the top component off the stack - we're now done with it
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$parent_component = array_pop($components); // Pop the component's conatining component off the stack so we can add this component to it.
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if($parent_component == null) {
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$parent_component = $this; // If there's no components on the stack, use the iCalendar object
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}
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if ($component !== null) {
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if ($parent_component->add_component($component) === false) {
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$this->parser_error("Failed to add component on line $key");
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}
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}
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if ($parent_component != $this) { // If we're not using the iCalendar
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array_push($components, $parent_component); // Put the component back on the stack
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}
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unset($parent_component, $component);
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} else {
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$component = array_pop($components); // Get the component off the stack so we can add properties to it
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if ($component == null) { // If there's nothing on the stack
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$component = $this; // use the iCalendar
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}
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$cleanedparams = [];
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// Some parameter values are wrapped by DQUOTE character.
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// We need to go through and get the actual value inside the quoted string.
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foreach ($params as $param => $value) {
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if (preg_match('#"(?P<actualvalue>[^"]*?)"#', $value, $matches)) {
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$cleanedparams[$param] = $matches['actualvalue'];
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} else {
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$cleanedparams[$param] = $value;
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}
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}
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$params = $cleanedparams;
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if ($component->add_property($label, $data, $params) === false) {
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$this->parser_error("Failed to add property '$label' on line $key");
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}
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if($component != $this) { // If we're not using the iCalendar
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array_push($components, $component); // Put the component back on the stack
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}
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unset($component);
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}
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}
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}
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function clear_errors() {
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$this->parser_errors = array();
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}
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function parser_error($error) {
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$this->parser_errors[] = $error;
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}
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}
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class iCalendar extends iCalendar_component {
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var $name = 'VCALENDAR';
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function __construct() {
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$this->valid_properties = array(
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'CALSCALE' => RFC2445_OPTIONAL | RFC2445_ONCE,
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'METHOD' => RFC2445_OPTIONAL | RFC2445_ONCE,
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'PRODID' => RFC2445_REQUIRED | RFC2445_ONCE,
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'VERSION' => RFC2445_REQUIRED | RFC2445_ONCE,
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RFC2445_XNAME => RFC2445_OPTIONAL
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);
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$this->valid_components = array(
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'VEVENT', 'VTODO', 'VJOURNAL', 'VFREEBUSY', 'VTIMEZONE', 'VALARM'
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);
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parent::__construct();
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}
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}
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class iCalendar_event extends iCalendar_component {
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363 |
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364 |
var $name = 'VEVENT';
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|
365 |
var $properties;
|
|
|
366 |
|
|
|
367 |
function __construct() {
|
|
|
368 |
|
|
|
369 |
$this->valid_components = array('VALARM');
|
|
|
370 |
|
|
|
371 |
$this->valid_properties = array(
|
|
|
372 |
'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
373 |
'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
374 |
'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
375 |
// Standard ambiguous here: in 4.6.1 it says that DTSTAMP in optional,
|
|
|
376 |
// while in 4.8.7.2 it says it's REQUIRED. Go with REQUIRED.
|
|
|
377 |
'DTSTAMP' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
378 |
// Standard ambiguous here: in 4.6.1 it says that DTSTART in optional,
|
|
|
379 |
// while in 4.8.2.4 it says it's REQUIRED. Go with REQUIRED.
|
|
|
380 |
'DTSTART' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
381 |
'GEO' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
382 |
'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
383 |
'LOCATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
384 |
'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
385 |
'PRIORITY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
386 |
'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
387 |
'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
388 |
'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
389 |
'TRANSP' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
390 |
// Standard ambiguous here: in 4.6.1 it says that UID in optional,
|
|
|
391 |
// while in 4.8.4.7 it says it's REQUIRED. Go with REQUIRED.
|
|
|
392 |
'UID' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
393 |
'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
394 |
'RECURRENCE-ID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
395 |
'DTEND' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
396 |
'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
397 |
'ATTACH' => RFC2445_OPTIONAL,
|
|
|
398 |
'ATTENDEE' => RFC2445_OPTIONAL,
|
|
|
399 |
'CATEGORIES' => RFC2445_OPTIONAL,
|
|
|
400 |
'COMMENT' => RFC2445_OPTIONAL,
|
|
|
401 |
'CONTACT' => RFC2445_OPTIONAL,
|
|
|
402 |
'EXDATE' => RFC2445_OPTIONAL,
|
|
|
403 |
'EXRULE' => RFC2445_OPTIONAL,
|
|
|
404 |
'REQUEST-STATUS' => RFC2445_OPTIONAL,
|
|
|
405 |
'RELATED-TO' => RFC2445_OPTIONAL,
|
|
|
406 |
'RESOURCES' => RFC2445_OPTIONAL,
|
|
|
407 |
'RDATE' => RFC2445_OPTIONAL,
|
|
|
408 |
'RRULE' => RFC2445_OPTIONAL,
|
|
|
409 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
410 |
);
|
|
|
411 |
|
|
|
412 |
parent::__construct();
|
|
|
413 |
}
|
|
|
414 |
|
|
|
415 |
function invariant_holds() {
|
|
|
416 |
// DTEND and DURATION must not appear together
|
|
|
417 |
if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
|
|
|
418 |
return false;
|
|
|
419 |
}
|
|
|
420 |
|
|
|
421 |
|
|
|
422 |
if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
|
|
|
423 |
// DTEND must be later than DTSTART
|
|
|
424 |
// The standard is not clear on how to hande different value types though
|
|
|
425 |
// TODO: handle this correctly even if the value types are different
|
|
|
426 |
if($this->properties['DTEND'][0]->value < $this->properties['DTSTART'][0]->value) {
|
|
|
427 |
return false;
|
|
|
428 |
}
|
|
|
429 |
|
|
|
430 |
// DTEND and DTSTART must have the same value type
|
|
|
431 |
if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
|
|
|
432 |
return false;
|
|
|
433 |
}
|
|
|
434 |
|
|
|
435 |
}
|
|
|
436 |
return true;
|
|
|
437 |
}
|
|
|
438 |
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
class iCalendar_todo extends iCalendar_component {
|
|
|
442 |
var $name = 'VTODO';
|
|
|
443 |
var $properties;
|
|
|
444 |
|
|
|
445 |
function __construct() {
|
|
|
446 |
|
|
|
447 |
$this->valid_components = array('VALARM');
|
|
|
448 |
|
|
|
449 |
$this->valid_properties = array(
|
|
|
450 |
'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
451 |
'COMPLETED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
452 |
'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
453 |
'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
454 |
'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
455 |
'DTSTAP' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
456 |
'GEO' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
457 |
'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
458 |
'LOCATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
459 |
'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
460 |
'PERCENT' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
461 |
'PRIORITY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
462 |
'RECURID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
463 |
'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
464 |
'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
465 |
'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
466 |
'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
467 |
'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
468 |
'DUE' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
469 |
'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
470 |
'ATTACH' => RFC2445_OPTIONAL,
|
|
|
471 |
'ATTENDEE' => RFC2445_OPTIONAL,
|
|
|
472 |
'CATEGORIES' => RFC2445_OPTIONAL,
|
|
|
473 |
'COMMENT' => RFC2445_OPTIONAL,
|
|
|
474 |
'CONTACT' => RFC2445_OPTIONAL,
|
|
|
475 |
'EXDATE' => RFC2445_OPTIONAL,
|
|
|
476 |
'EXRULE' => RFC2445_OPTIONAL,
|
|
|
477 |
'RSTATUS' => RFC2445_OPTIONAL,
|
|
|
478 |
'RELATED' => RFC2445_OPTIONAL,
|
|
|
479 |
'RESOURCES' => RFC2445_OPTIONAL,
|
|
|
480 |
'RDATE' => RFC2445_OPTIONAL,
|
|
|
481 |
'RRULE' => RFC2445_OPTIONAL,
|
|
|
482 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
483 |
);
|
|
|
484 |
|
|
|
485 |
parent::__construct();
|
|
|
486 |
}
|
|
|
487 |
|
|
|
488 |
function invariant_holds() {
|
|
|
489 |
// DTEND and DURATION must not appear together
|
|
|
490 |
if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
|
|
|
491 |
return false;
|
|
|
492 |
}
|
|
|
493 |
|
|
|
494 |
|
|
|
495 |
if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
|
|
|
496 |
// DTEND must be later than DTSTART
|
|
|
497 |
// The standard is not clear on how to hande different value types though
|
|
|
498 |
// TODO: handle this correctly even if the value types are different
|
|
|
499 |
if($this->properties['DTEND'][0]->value <= $this->properties['DTSTART'][0]->value) {
|
|
|
500 |
return false;
|
|
|
501 |
}
|
|
|
502 |
|
|
|
503 |
// DTEND and DTSTART must have the same value type
|
|
|
504 |
if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
|
|
|
505 |
return false;
|
|
|
506 |
}
|
|
|
507 |
|
|
|
508 |
}
|
|
|
509 |
|
|
|
510 |
if(isset($this->properties['DUE']) && isset($this->properties['DTSTART'])) {
|
|
|
511 |
if($this->properties['DUE'][0]->value <= $this->properties['DTSTART'][0]->value) {
|
|
|
512 |
return false;
|
|
|
513 |
}
|
|
|
514 |
}
|
|
|
515 |
|
|
|
516 |
return true;
|
|
|
517 |
}
|
|
|
518 |
|
|
|
519 |
}
|
|
|
520 |
|
|
|
521 |
class iCalendar_journal extends iCalendar_component {
|
|
|
522 |
var $name = 'VJOURNAL';
|
|
|
523 |
var $properties;
|
|
|
524 |
|
|
|
525 |
function __construct() {
|
|
|
526 |
|
|
|
527 |
$this->valid_properties = array(
|
|
|
528 |
'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
529 |
'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
530 |
'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
531 |
'DTSTART' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
532 |
'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
533 |
'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
534 |
'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
535 |
'RECURRANCE-ID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
536 |
'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
537 |
'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
538 |
'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
539 |
'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
540 |
'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
541 |
'ATTACH' => RFC2445_OPTIONAL,
|
|
|
542 |
'ATTENDEE' => RFC2445_OPTIONAL,
|
|
|
543 |
'CATEGORIES' => RFC2445_OPTIONAL,
|
|
|
544 |
'COMMENT' => RFC2445_OPTIONAL,
|
|
|
545 |
'CONTACT' => RFC2445_OPTIONAL,
|
|
|
546 |
'EXDATE' => RFC2445_OPTIONAL,
|
|
|
547 |
'EXRULE' => RFC2445_OPTIONAL,
|
|
|
548 |
'RELATED-TO' => RFC2445_OPTIONAL,
|
|
|
549 |
'RDATE' => RFC2445_OPTIONAL,
|
|
|
550 |
'RRULE' => RFC2445_OPTIONAL,
|
|
|
551 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
552 |
);
|
|
|
553 |
|
|
|
554 |
parent::__construct();
|
|
|
555 |
|
|
|
556 |
}
|
|
|
557 |
}
|
|
|
558 |
|
|
|
559 |
class iCalendar_freebusy extends iCalendar_component {
|
|
|
560 |
var $name = 'VFREEBUSY';
|
|
|
561 |
var $properties;
|
|
|
562 |
|
|
|
563 |
function __construct() {
|
|
|
564 |
$this->valid_components = array();
|
|
|
565 |
$this->valid_properties = array(
|
|
|
566 |
'CONTACT' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
567 |
'DTSTART' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
568 |
'DTEND' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
569 |
'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
570 |
'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
571 |
'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
572 |
'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
573 |
'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
574 |
// TODO: the next two are components of their own!
|
|
|
575 |
'ATTENDEE' => RFC2445_OPTIONAL,
|
|
|
576 |
'COMMENT' => RFC2445_OPTIONAL,
|
|
|
577 |
'FREEBUSY' => RFC2445_OPTIONAL,
|
|
|
578 |
'RSTATUS' => RFC2445_OPTIONAL,
|
|
|
579 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
580 |
);
|
|
|
581 |
|
|
|
582 |
parent::__construct();
|
|
|
583 |
}
|
|
|
584 |
|
|
|
585 |
function invariant_holds() {
|
|
|
586 |
// DTEND and DURATION must not appear together
|
|
|
587 |
if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
|
|
|
588 |
return false;
|
|
|
589 |
}
|
|
|
590 |
|
|
|
591 |
|
|
|
592 |
if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
|
|
|
593 |
// DTEND must be later than DTSTART
|
|
|
594 |
// The standard is not clear on how to hande different value types though
|
|
|
595 |
// TODO: handle this correctly even if the value types are different
|
|
|
596 |
if($this->properties['DTEND'][0]->value <= $this->properties['DTSTART'][0]->value) {
|
|
|
597 |
return false;
|
|
|
598 |
}
|
|
|
599 |
|
|
|
600 |
// DTEND and DTSTART must have the same value type
|
|
|
601 |
if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
|
|
|
602 |
return false;
|
|
|
603 |
}
|
|
|
604 |
|
|
|
605 |
}
|
|
|
606 |
return true;
|
|
|
607 |
}
|
|
|
608 |
}
|
|
|
609 |
|
|
|
610 |
class iCalendar_alarm extends iCalendar_component {
|
|
|
611 |
var $name = 'VALARM';
|
|
|
612 |
var $properties;
|
|
|
613 |
|
|
|
614 |
function __construct() {
|
|
|
615 |
$this->valid_components = array();
|
|
|
616 |
$this->valid_properties = array(
|
|
|
617 |
'ACTION' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
618 |
'TRIGGER' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
619 |
// If one of these 2 occurs, so must the other.
|
|
|
620 |
'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
621 |
'REPEAT' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
622 |
// The following is required if action == "PROCEDURE" | "AUDIO"
|
|
|
623 |
'ATTACH' => RFC2445_OPTIONAL,
|
|
|
624 |
// The following is required if trigger == "EMAIL" | "DISPLAY"
|
|
|
625 |
'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
626 |
// The following are required if action == "EMAIL"
|
|
|
627 |
'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
628 |
'ATTENDEE' => RFC2445_OPTIONAL,
|
|
|
629 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
630 |
);
|
|
|
631 |
|
|
|
632 |
parent::__construct();
|
|
|
633 |
}
|
|
|
634 |
|
|
|
635 |
function invariant_holds() {
|
|
|
636 |
// DTEND and DURATION must not appear together
|
|
|
637 |
if(isset($this->properties['ACTION'])) {
|
|
|
638 |
switch ($this->properties['ACTION'][0]->value) {
|
|
|
639 |
case 'AUDIO':
|
|
|
640 |
if (!isset($this->properties['ATTACH'])) {
|
|
|
641 |
return false;
|
|
|
642 |
}
|
|
|
643 |
break;
|
|
|
644 |
case 'DISPLAY':
|
|
|
645 |
if (!isset($this->properties['DESCRIPTION'])) {
|
|
|
646 |
return false;
|
|
|
647 |
}
|
|
|
648 |
break;
|
|
|
649 |
case 'EMAIL':
|
|
|
650 |
if (!isset($this->properties['DESCRIPTION']) || !isset($this->properties['SUMMARY']) || !isset($this->properties['ATTACH'])) {
|
|
|
651 |
return false;
|
|
|
652 |
}
|
|
|
653 |
break;
|
|
|
654 |
case 'PROCEDURE':
|
|
|
655 |
if (!isset($this->properties['ATTACH']) || count($this->properties['ATTACH']) > 1) {
|
|
|
656 |
return false;
|
|
|
657 |
}
|
|
|
658 |
break;
|
|
|
659 |
}
|
|
|
660 |
}
|
|
|
661 |
return true;
|
|
|
662 |
}
|
|
|
663 |
|
|
|
664 |
|
|
|
665 |
}
|
|
|
666 |
|
|
|
667 |
class iCalendar_timezone extends iCalendar_component {
|
|
|
668 |
var $name = 'VTIMEZONE';
|
|
|
669 |
var $properties;
|
|
|
670 |
|
|
|
671 |
function __construct() {
|
|
|
672 |
|
|
|
673 |
$this->valid_components = array('STANDARD', 'DAYLIGHT');
|
|
|
674 |
|
|
|
675 |
$this->valid_properties = array(
|
|
|
676 |
'TZID' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
677 |
'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
678 |
'TZURL' => RFC2445_OPTIONAL | RFC2445_ONCE,
|
|
|
679 |
RFC2445_XNAME => RFC2445_OPTIONAL
|
|
|
680 |
);
|
|
|
681 |
|
|
|
682 |
parent::__construct();
|
|
|
683 |
}
|
|
|
684 |
|
|
|
685 |
}
|
|
|
686 |
|
|
|
687 |
class iCalendar_standard extends iCalendar_component {
|
|
|
688 |
var $name = 'STANDARD';
|
|
|
689 |
var $properties;
|
|
|
690 |
|
|
|
691 |
function __construct() {
|
|
|
692 |
$this->valid_components = array();
|
|
|
693 |
$this->valid_properties = array(
|
|
|
694 |
'DTSTART' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
695 |
'TZOFFSETTO' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
696 |
'TZOFFSETFROM' => RFC2445_REQUIRED | RFC2445_ONCE,
|
|
|
697 |
'COMMENT' => RFC2445_OPTIONAL,
|
|
|
698 |
'RDATE' => RFC2445_OPTIONAL,
|
|
|
699 |
'RRULE' => RFC2445_OPTIONAL,
|
|
|
700 |
'TZNAME' => RFC2445_OPTIONAL,
|
|
|
701 |
'TZURL' => RFC2445_OPTIONAL,
|
|
|
702 |
RFC2445_XNAME => RFC2445_OPTIONAL,
|
|
|
703 |
);
|
|
|
704 |
parent::__construct();
|
|
|
705 |
}
|
|
|
706 |
}
|
|
|
707 |
|
|
|
708 |
class iCalendar_daylight extends iCalendar_standard {
|
|
|
709 |
var $name = 'DAYLIGHT';
|
|
|
710 |
}
|
|
|
711 |
|
|
|
712 |
// REMINDER: DTEND must be later than DTSTART for all components which support both
|
|
|
713 |
// REMINDER: DUE must be later than DTSTART for all components which support both
|
|
|
714 |
|