/lib/bennu/iCalendar_components.php
PHP | 699 lines | 498 code | 109 blank | 92 comment | 92 complexity | 7fe47f7f3d0e3bdcdeb18a43a26c85c6 MD5 | raw file
- <?php
- /**
- * BENNU - PHP iCalendar library
- * (c) 2005-2006 Ioannis Papaioannou (pj@moodle.org). All rights reserved.
- *
- * Released under the LGPL.
- *
- * See http://bennu.sourceforge.net/ for more information and downloads.
- *
- * @author Ioannis Papaioannou
- * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
- */
- class iCalendar_component {
- var $name = NULL;
- var $properties = NULL;
- var $components = NULL;
- var $valid_properties = NULL;
- var $valid_components = NULL;
- /**
- * Added to hold errors from last run of unserialize
- * @var $parser_errors array
- */
- var $parser_errors = NULL;
- function __construct() {
- // Initialize the components array
- if(empty($this->components)) {
- $this->components = array();
- foreach($this->valid_components as $name) {
- $this->components[$name] = array();
- }
- }
- }
- function get_name() {
- return $this->name;
- }
- function add_property($name, $value = NULL, $parameters = NULL) {
- // Uppercase first of all
- $name = strtoupper($name);
- // Are we trying to add a valid property?
- $xname = false;
- if(!isset($this->valid_properties[$name])) {
- // If not, is it an x-name as per RFC 2445?
- if(!rfc2445_is_xname($name)) {
- return false;
- }
- // Since this is an xname, all components are supposed to allow this property
- $xname = true;
- }
- // Create a property object of the correct class
- if($xname) {
- $property = new iCalendar_property_x;
- $property->set_name($name);
- }
- else {
- $classname = 'iCalendar_property_'.strtolower(str_replace('-', '_', $name));
- $property = new $classname;
- }
- // If $value is NULL, then this property must define a default value.
- if($value === NULL) {
- $value = $property->default_value();
- if($value === NULL) {
- return false;
- }
- }
- // Set this property's parent component to ourselves, because some
- // properties behave differently according to what component they apply to.
- $property->set_parent_component($this->name);
- // Set parameters before value; this helps with some properties which
- // accept a VALUE parameter, and thus change their default value type.
- // The parameters must be valid according to property specifications
- if(!empty($parameters)) {
- foreach($parameters as $paramname => $paramvalue) {
- if(!$property->set_parameter($paramname, $paramvalue)) {
- return false;
- }
- }
- // Some parameters interact among themselves (e.g. ENCODING and VALUE)
- // so make sure that after the dust settles, these invariants hold true
- if(!$property->invariant_holds()) {
- return false;
- }
- }
- // $value MUST be valid according to the property data type
- if(!$property->set_value($value)) {
- return false;
- }
- // Check if the property already exists, and is limited to one occurrance,
- // DON'T overwrite the value - this can be done explicity with set_value() instead.
- if(!$xname && $this->valid_properties[$name] & RFC2445_ONCE && isset($this->properties[$name])) {
- return false;
- }
- else {
- // Otherwise add it to the instance array for this property
- $this->properties[$name][] = $property;
- }
- // Finally: after all these, does the component invariant hold?
- if(!$this->invariant_holds()) {
- // If not, completely undo the property addition
- array_pop($this->properties[$name]);
- if(empty($this->properties[$name])) {
- unset($this->properties[$name]);
- }
- return false;
- }
- return true;
-
- }
- function add_component($component) {
- // With the detailed interface, you can add only components with this function
- if(!is_object($component) || !is_subclass_of($component, 'iCalendar_component')) {
- return false;
- }
- $name = $component->get_name();
- // Only valid components as specified by this component are allowed
- if(!in_array($name, $this->valid_components)) {
- return false;
- }
- // Add it
- $this->components[$name][] = $component;
- return true;
- }
- function get_property_list($name) {
- }
- function invariant_holds() {
- return true;
- }
- function is_valid() {
- // If we have any child components, check that they are all valid
- if(!empty($this->components)) {
- foreach($this->components as $component => $instances) {
- foreach($instances as $number => $instance) {
- if(!$instance->is_valid()) {
- return false;
- }
- }
- }
- }
- // Finally, check the valid property list for any mandatory properties
- // that have not been set and do not have a default value
- foreach($this->valid_properties as $property => $propdata) {
- if(($propdata & RFC2445_REQUIRED) && empty($this->properties[$property])) {
- $classname = 'iCalendar_property_'.strtolower(str_replace('-', '_', $property));
- $object = new $classname;
- if($object->default_value() === NULL) {
- return false;
- }
- unset($object);
- }
- }
- return true;
- }
-
- function serialize() {
- // Check for validity of the object
- if(!$this->is_valid()) {
- return false;
- }
- // Maybe the object is valid, but there are some required properties that
- // have not been given explicit values. In that case, set them to defaults.
- foreach($this->valid_properties as $property => $propdata) {
- if(($propdata & RFC2445_REQUIRED) && empty($this->properties[$property])) {
- $this->add_property($property);
- }
- }
- // Start tag
- $string = rfc2445_fold('BEGIN:'.$this->name) . RFC2445_CRLF;
- // List of properties
- if(!empty($this->properties)) {
- foreach($this->properties as $name => $properties) {
- foreach($properties as $property) {
- $string .= $property->serialize();
- }
- }
- }
- // List of components
- if(!empty($this->components)) {
- foreach($this->components as $name => $components) {
- foreach($components as $component) {
- $string .= $component->serialize();
- }
- }
- }
- // End tag
- $string .= rfc2445_fold('END:'.$this->name) . RFC2445_CRLF;
- return $string;
- }
-
- /**
- * unserialize()
- *
- * I needed a way to convert an iCalendar component back to a Bennu object so I could
- * easily access and modify it after it had been stored; if this functionality is already
- * present somewhere in the library, I apologize for adding it here unnecessarily; however,
- * I couldn't find it so I added it myself.
- * @param string $string the iCalendar object to load in to this iCalendar_component
- * @return bool true if the file parsed with no errors. False if there were errors.
- */
-
- function unserialize($string) {
- $string = rfc2445_unfold($string); // Unfold any long lines
- $lines = preg_split("<".RFC2445_CRLF."|\n|\r>", $string, 0, PREG_SPLIT_NO_EMPTY); // Create an array of lines.
-
- $components = array(); // Initialise a stack of components
- $this->clear_errors();
- foreach ($lines as $key => $line) {
- // ignore empty lines
- if (trim($line) == '') {
- continue;
- }
- // Divide the line up into label, parameters and data fields.
- if (!preg_match('#^(?P<label>[-[:alnum:]]+)(?P<params>(?:;(?:(?:[-[:alnum:]]+)=(?:[^[:cntrl:]";:,]+|"[^[:cntrl:]"]+")))*):(?P<data>.*)$#', $line, $match)) {
- $this->parser_error('Invalid line: '.$key.', ignoring');
- continue;
- }
- // parse parameters
- $params = array();
- if (preg_match_all('#;(?P<param>[-[:alnum:]]+)=(?P<value>[^[:cntrl:]";:,]+|"[^[:cntrl:]"]+")#', $match['params'], $pmatch)) {
- $params = array_combine($pmatch['param'], $pmatch['value']);
- }
- $label = $match['label'];
- $data = $match['data'];
- unset($match, $pmatch);
- if ($label == 'BEGIN') {
- // This is the start of a component.
- $current_component = array_pop($components); // Get the current component off the stack so we can check its valid components
- if ($current_component == null) { // If there's nothing on the stack
- $current_component = $this; // use the iCalendar
- }
- if (in_array($data, $current_component->valid_components)) { // Check that the new component is a valid subcomponent of the current one
- if($current_component != $this) {
- array_push($components, $current_component); // We're done with the current component, put it back on the stack.
- }
- if(strpos($data, 'V') === 0) {
- $data = substr($data, 1);
- }
- $cname = 'iCalendar_' . strtolower($data);
- $new_component = new $cname;
- array_push($components, $new_component); // Push a new component onto the stack
- } else {
- if($current_component != $this) {
- array_push($components, $current_component);
- $this->parser_error('Invalid component type on line '.$key);
- }
- }
- unset($current_component, $new_component);
- } else if ($label == 'END') {
- // It's the END of a component.
- $component = array_pop($components); // Pop the top component off the stack - we're now done with it
- $parent_component = array_pop($components); // Pop the component's conatining component off the stack so we can add this component to it.
- if($parent_component == null) {
- $parent_component = $this; // If there's no components on the stack, use the iCalendar object
- }
- if ($parent_component->add_component($component) === false) {
- $this->parser_error("Failed to add component on line $key");
- }
- if ($parent_component != $this) { // If we're not using the iCalendar
- array_push($components, $parent_component); // Put the component back on the stack
- }
- unset($parent_component, $component);
- } else {
-
- $component = array_pop($components); // Get the component off the stack so we can add properties to it
- if ($component == null) { // If there's nothing on the stack
- $component = $this; // use the iCalendar
- }
- if ($component->add_property($label, $data, $params) === false) {
- $this->parser_error("Failed to add property '$label' on line $key");
- }
- if($component != $this) { // If we're not using the iCalendar
- array_push($components, $component); // Put the component back on the stack
- }
- unset($component);
- }
- }
-
- }
- function clear_errors() {
- $this->parser_errors = array();
- }
- function parser_error($error) {
- $this->parser_errors[] = $error;
- }
- }
- class iCalendar extends iCalendar_component {
- var $name = 'VCALENDAR';
- function __construct() {
- $this->valid_properties = array(
- 'CALSCALE' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'METHOD' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'PRODID' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'VERSION' => RFC2445_REQUIRED | RFC2445_ONCE,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
- $this->valid_components = array(
- 'VEVENT', 'VTODO', 'VJOURNAL', 'VFREEBUSY', 'VTIMEZONE', 'VALARM'
- );
- parent::__construct();
- }
- }
- class iCalendar_event extends iCalendar_component {
- var $name = 'VEVENT';
- var $properties;
-
- function __construct() {
-
- $this->valid_components = array('VALARM');
- $this->valid_properties = array(
- 'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- // Standard ambiguous here: in 4.6.1 it says that DTSTAMP in optional,
- // while in 4.8.7.2 it says it's REQUIRED. Go with REQUIRED.
- 'DTSTAMP' => RFC2445_REQUIRED | RFC2445_ONCE,
- // Standard ambiguous here: in 4.6.1 it says that DTSTART in optional,
- // while in 4.8.2.4 it says it's REQUIRED. Go with REQUIRED.
- 'DTSTART' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'GEO' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'LOCATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'PRIORITY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'TRANSP' => RFC2445_OPTIONAL | RFC2445_ONCE,
- // Standard ambiguous here: in 4.6.1 it says that UID in optional,
- // while in 4.8.4.7 it says it's REQUIRED. Go with REQUIRED.
- 'UID' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'RECURRENCE-ID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTEND' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ATTACH' => RFC2445_OPTIONAL,
- 'ATTENDEE' => RFC2445_OPTIONAL,
- 'CATEGORIES' => RFC2445_OPTIONAL,
- 'COMMENT' => RFC2445_OPTIONAL,
- 'CONTACT' => RFC2445_OPTIONAL,
- 'EXDATE' => RFC2445_OPTIONAL,
- 'EXRULE' => RFC2445_OPTIONAL,
- 'REQUEST-STATUS' => RFC2445_OPTIONAL,
- 'RELATED-TO' => RFC2445_OPTIONAL,
- 'RESOURCES' => RFC2445_OPTIONAL,
- 'RDATE' => RFC2445_OPTIONAL,
- 'RRULE' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
- parent::__construct();
- }
- function invariant_holds() {
- // DTEND and DURATION must not appear together
- if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
- return false;
- }
-
- if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
- // DTEND must be later than DTSTART
- // The standard is not clear on how to hande different value types though
- // TODO: handle this correctly even if the value types are different
- if($this->properties['DTEND'][0]->value <= $this->properties['DTSTART'][0]->value) {
- return false;
- }
- // DTEND and DTSTART must have the same value type
- if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
- return false;
- }
- }
- return true;
- }
- }
- class iCalendar_todo extends iCalendar_component {
- var $name = 'VTODO';
- var $properties;
- function __construct() {
-
- $this->valid_components = array('VALARM');
- $this->valid_properties = array(
- 'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'COMPLETED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTAP' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'GEO' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'LOCATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'PERCENT' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'PRIORITY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'RECURID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DUE' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ATTACH' => RFC2445_OPTIONAL,
- 'ATTENDEE' => RFC2445_OPTIONAL,
- 'CATEGORIES' => RFC2445_OPTIONAL,
- 'COMMENT' => RFC2445_OPTIONAL,
- 'CONTACT' => RFC2445_OPTIONAL,
- 'EXDATE' => RFC2445_OPTIONAL,
- 'EXRULE' => RFC2445_OPTIONAL,
- 'RSTATUS' => RFC2445_OPTIONAL,
- 'RELATED' => RFC2445_OPTIONAL,
- 'RESOURCES' => RFC2445_OPTIONAL,
- 'RDATE' => RFC2445_OPTIONAL,
- 'RRULE' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
- parent::__construct();
- }
-
- function invariant_holds() {
- // DTEND and DURATION must not appear together
- if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
- return false;
- }
-
- if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
- // DTEND must be later than DTSTART
- // The standard is not clear on how to hande different value types though
- // TODO: handle this correctly even if the value types are different
- if($this->properties['DTEND'][0]->value <= $this->properties['DTSTART'][0]->value) {
- return false;
- }
- // DTEND and DTSTART must have the same value type
- if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
- return false;
- }
- }
-
- if(isset($this->properties['DUE']) && isset($this->properties['DTSTART'])) {
- if($this->properties['DUE'][0]->value <= $this->properties['DTSTART'][0]->value) {
- return false;
- }
- }
-
- return true;
- }
-
- }
- class iCalendar_journal extends iCalendar_component {
- var $name = 'VJOURNAL';
- var $properties;
-
- function __construct() {
-
- $this->valid_properties = array(
- 'CLASS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'CREATED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTART' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'RECURRANCE-ID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SEQUENCE' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'STATUS' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ATTACH' => RFC2445_OPTIONAL,
- 'ATTENDEE' => RFC2445_OPTIONAL,
- 'CATEGORIES' => RFC2445_OPTIONAL,
- 'COMMENT' => RFC2445_OPTIONAL,
- 'CONTACT' => RFC2445_OPTIONAL,
- 'EXDATE' => RFC2445_OPTIONAL,
- 'EXRULE' => RFC2445_OPTIONAL,
- 'RELATED-TO' => RFC2445_OPTIONAL,
- 'RDATE' => RFC2445_OPTIONAL,
- 'RRULE' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
-
- parent::__construct();
-
- }
- }
- class iCalendar_freebusy extends iCalendar_component {
- var $name = 'VFREEBUSY';
- var $properties;
- function __construct() {
- $this->valid_components = array();
- $this->valid_properties = array(
- 'CONTACT' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTART' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTEND' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'DTSTAMP' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ORGANIZER' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'UID' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'URL' => RFC2445_OPTIONAL | RFC2445_ONCE,
- // TODO: the next two are components of their own!
- 'ATTENDEE' => RFC2445_OPTIONAL,
- 'COMMENT' => RFC2445_OPTIONAL,
- 'FREEBUSY' => RFC2445_OPTIONAL,
- 'RSTATUS' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
-
- parent::__construct();
- }
-
- function invariant_holds() {
- // DTEND and DURATION must not appear together
- if(isset($this->properties['DTEND']) && isset($this->properties['DURATION'])) {
- return false;
- }
-
- if(isset($this->properties['DTEND']) && isset($this->properties['DTSTART'])) {
- // DTEND must be later than DTSTART
- // The standard is not clear on how to hande different value types though
- // TODO: handle this correctly even if the value types are different
- if($this->properties['DTEND'][0]->value <= $this->properties['DTSTART'][0]->value) {
- return false;
- }
- // DTEND and DTSTART must have the same value type
- if($this->properties['DTEND'][0]->val_type != $this->properties['DTSTART'][0]->val_type) {
- return false;
- }
- }
- return true;
- }
- }
- class iCalendar_alarm extends iCalendar_component {
- var $name = 'VALARM';
- var $properties;
- function __construct() {
- $this->valid_components = array();
- $this->valid_properties = array(
- 'ACTION' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'TRIGGER' => RFC2445_REQUIRED | RFC2445_ONCE,
- // If one of these 2 occurs, so must the other.
- 'DURATION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'REPEAT' => RFC2445_OPTIONAL | RFC2445_ONCE,
- // The following is required if action == "PROCEDURE" | "AUDIO"
- 'ATTACH' => RFC2445_OPTIONAL,
- // The following is required if trigger == "EMAIL" | "DISPLAY"
- 'DESCRIPTION' => RFC2445_OPTIONAL | RFC2445_ONCE,
- // The following are required if action == "EMAIL"
- 'SUMMARY' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'ATTENDEE' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
-
- parent::__construct();
- }
-
- function invariant_holds() {
- // DTEND and DURATION must not appear together
- if(isset($this->properties['ACTION'])) {
- switch ($this->properties['ACTION'][0]->value) {
- case 'AUDIO':
- if (!isset($this->properties['ATTACH'])) {
- return false;
- }
- break;
- case 'DISPLAY':
- if (!isset($this->properties['DESCRIPTION'])) {
- return false;
- }
- break;
- case 'EMAIL':
- if (!isset($this->properties['DESCRIPTION']) || !isset($this->properties['SUMMARY']) || !isset($this->properties['ATTACH'])) {
- return false;
- }
- break;
- case 'PROCEDURE':
- if (!isset($this->properties['ATTACH']) || count($this->properties['ATTACH']) > 1) {
- return false;
- }
- break;
- }
- }
- return true;
- }
-
-
- }
- class iCalendar_timezone extends iCalendar_component {
- var $name = 'VTIMEZONE';
- var $properties;
- function __construct() {
- $this->valid_components = array('STANDARD', 'DAYLIGHT');
- $this->valid_properties = array(
- 'TZID' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'LAST-MODIFIED' => RFC2445_OPTIONAL | RFC2445_ONCE,
- 'TZURL' => RFC2445_OPTIONAL | RFC2445_ONCE,
- RFC2445_XNAME => RFC2445_OPTIONAL
- );
-
- parent::__construct();
- }
- }
- class iCalendar_standard extends iCalendar_component {
- var $name = 'STANDARD';
- var $properties;
-
- function __construct() {
- $this->valid_components = array();
- $this->valid_properties = array(
- 'DTSTART' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'TZOFFSETTO' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'TZOFFSETFROM' => RFC2445_REQUIRED | RFC2445_ONCE,
- 'COMMENT' => RFC2445_OPTIONAL,
- 'RDATE' => RFC2445_OPTIONAL,
- 'RRULE' => RFC2445_OPTIONAL,
- 'TZNAME' => RFC2445_OPTIONAL,
- RFC2445_XNAME => RFC2445_OPTIONAL,
- );
- parent::__construct();
- }
- }
- class iCalendar_daylight extends iCalendar_standard {
- var $name = 'DAYLIGHT';
- }
- // REMINDER: DTEND must be later than DTSTART for all components which support both
- // REMINDER: DUE must be later than DTSTART for all components which support both