745 lines
32 KiB
PHP
745 lines
32 KiB
PHP
<?php
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/**
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* This PHP class should only read an iCal file (*.ics), parse it and return an
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* array with its content.
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*
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* PHP Version 5
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*
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* @category Parser
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* @package ics-parser
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* @author Martin Thoma <info@martin-thoma.de>
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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* @link https://github.com/MartinThoma/ics-parser/
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* @version 1.0.3
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*/
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/**
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* This is the ICal class
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*
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* @param {string} filename The name of the file which should be parsed
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* @constructor
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*/
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class ICal
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{
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/* How many ToDos are in this iCal? */
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public /** @type {int} */ $todo_count = 0;
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/* How many events are in this iCal? */
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public /** @type {int} */ $event_count = 0;
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/* How many freebusy are in this iCal? */
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public /** @type {int} */ $freebusy_count = 0;
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/* The parsed calendar */
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public /** @type {Array} */ $cal;
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/* Which keyword has been added to cal at last? */
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private /** @type {string} */ $last_keyword;
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/* The value in years to use for indefinite, recurring events */
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public /** @type {int} */ $default_span = 2;
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/**
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* Creates the iCal Object
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*
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* @param {mixed} $filename The path to the iCal-file or an array of lines from an iCal file
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*
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* @return Object The iCal Object
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*/
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public function __construct($filename=false)
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{
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if (!$filename) {
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return false;
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}
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if (is_array($filename)) {
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$lines = $filename;
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} else {
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$lines = file($filename, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
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}
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return $this->initLines($lines);
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}
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/**
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* Initializes lines from a URL
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*
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* @url {string} $url The url of the ical file to download and initialize. Unless you know what you're doing, it should begin with "http://"
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*
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* @return Object The iCal Object
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*/
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public function initURL($url)
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{
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$contents = file_get_contents($url);
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$lines = explode("\n", $contents);
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return $this->initLines($lines);
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}
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/**
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* Initializes lines from a string
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*
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* @param {string} $contents The contents of the ical file to initialize
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*
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* @return Object The iCal Object
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*/
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public function initString($contents)
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{
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$lines = explode("\n", $contents);
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return $this->initLines($lines);
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}
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/**
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* Initializes lines from file
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*
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* @param {array} $lines The lines to initialize
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*
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* @return Object The iCal Object
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*/
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public function initLines($lines)
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{
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if (stristr($lines[0], 'BEGIN:VCALENDAR') === false) {
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return false;
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} else {
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foreach ($lines as $line) {
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$line = rtrim($line); // Trim trailing whitespace
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$add = $this->keyValueFromString($line);
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if ($add === false) {
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$this->addCalendarComponentWithKeyAndValue($component, false, $line);
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continue;
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}
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$keyword = $add[0];
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$values = $add[1]; // Could be an array containing multiple values
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if (!is_array($values)) {
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if (!empty($values)) {
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$values = array($values); // Make an array as not already
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$blank_array = array(); // Empty placeholder array
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array_push($values, $blank_array);
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} else {
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$values = array(); // Use blank array to ignore this line
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}
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} else if(empty($values[0])) {
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$values = array(); // Use blank array to ignore this line
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}
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$values = array_reverse($values); // Reverse so that our array of properties is processed first
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foreach ($values as $value) {
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switch ($line) {
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// http://www.kanzaki.com/docs/ical/vtodo.html
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case 'BEGIN:VTODO':
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$this->todo_count++;
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$component = 'VTODO';
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break;
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// http://www.kanzaki.com/docs/ical/vevent.html
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case 'BEGIN:VEVENT':
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if (!is_array($value)) {
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$this->event_count++;
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}
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$component = 'VEVENT';
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break;
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// http://www.kanzaki.com/docs/ical/vfreebusy.html
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case 'BEGIN:VFREEBUSY':
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$this->freebusy_count++;
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$component = 'VFREEBUSY';
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break;
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// All other special strings
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case 'BEGIN:VCALENDAR':
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case 'BEGIN:DAYLIGHT':
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// http://www.kanzaki.com/docs/ical/vtimezone.html
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case 'BEGIN:VTIMEZONE':
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case 'BEGIN:STANDARD':
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case 'BEGIN:VALARM':
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$component = $value;
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break;
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case 'END:VALARM':
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case 'END:VTODO': // End special text - goto VCALENDAR key
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case 'END:VEVENT':
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case 'END:VFREEBUSY':
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case 'END:VCALENDAR':
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case 'END:DAYLIGHT':
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case 'END:VTIMEZONE':
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case 'END:STANDARD':
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$component = 'VCALENDAR';
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break;
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default:
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$this->addCalendarComponentWithKeyAndValue($component, $keyword, $value);
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break;
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}
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}
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}
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$this->process_recurrences();
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return $this->cal;
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}
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}
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/**
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* Add to $this->ical array one value and key.
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*
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* @param {string} $component This could be VTODO, VEVENT, VCALENDAR, ...
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* @param {string} $keyword The keyword, for example DTSTART
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* @param {string} $value The value, for example 20110105T090000Z
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*
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* @return {None}
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*/
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public function addCalendarComponentWithKeyAndValue($component, $keyword, $value)
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{
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if ($keyword == false) {
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$keyword = $this->last_keyword;
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}
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switch ($component) {
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case 'VTODO':
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$this->cal[$component][$this->todo_count - 1][$keyword] = $value;
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break;
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case 'VEVENT':
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if (!isset($this->cal[$component][$this->event_count - 1][$keyword . '_array'])) {
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$this->cal[$component][$this->event_count - 1][$keyword . '_array'] = array(); // Create array()
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}
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if (is_array($value)) {
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array_push($this->cal[$component][$this->event_count - 1][$keyword . '_array'], $value); // Add array of properties to the end
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} else {
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if (!isset($this->cal[$component][$this->event_count - 1][$keyword])) {
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$this->cal[$component][$this->event_count - 1][$keyword] = $value;
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}
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$this->cal[$component][$this->event_count - 1][$keyword . '_array'][] = $value;
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// Glue back together for multi-line content
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if ($this->cal[$component][$this->event_count - 1][$keyword] != $value) {
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$ord = (isset($value[0])) ? ord($value[0]) : NULL; // First char
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if(in_array($ord, array(9, 32))){ // Is space or tab?
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$value = substr($value, 1); // Only trim the first character
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}
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if(is_array($this->cal[$component][$this->event_count - 1][$keyword . '_array'][1])){ // Account for multiple definitions of current keyword (e.g. ATTENDEE)
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$this->cal[$component][$this->event_count - 1][$keyword] .= ';' . $value; // Concat value *with separator* as content spans multiple lines
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} else {
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$this->cal[$component][$this->event_count - 1][$keyword] .= $value; // Concat value as content spans multiple lines
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}
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}
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}
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break;
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case 'VFREEBUSY':
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$this->cal[$component][$this->freebusy_count - 1][$keyword] = $value;
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break;
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default:
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$this->cal[$component][$keyword] = $value;
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break;
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}
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$this->last_keyword = $keyword;
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}
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/**
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* Get a key-value pair of a string.
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*
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* @param {string} $text which is like "VCALENDAR:Begin" or "LOCATION:"
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*
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* @return {array} array("VCALENDAR", "Begin")
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*/
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public function keyValueFromString($text)
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{
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// Match colon separator outside of quoted substrings
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// Fallback to nearest semicolon outside of quoted substrings, if colon cannot be found
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// Do not try and match within the value paired with the keyword
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preg_match('/(.*?)(?::(?=(?:[^"]*"[^"]*")*[^"]*$)|;(?=[^:]*$))([\w\W]*)/', htmlspecialchars($text, ENT_QUOTES, 'UTF-8'), $matches);
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if (count($matches) == 0) {
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return false;
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}
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if (preg_match('/^([A-Z-]+)([;][\w\W]*)?$/', $matches[1])) {
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$matches = array_splice($matches, 1, 2); // Remove first match and re-align ordering
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// Process properties
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if (preg_match('/([A-Z-]+)[;]([\w\W]*)/', $matches[0], $properties)) {
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array_shift($properties); // Remove first match
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$matches[0] = $properties[0]; // Fix to ignore everything in keyword after a ; (e.g. Language, TZID, etc.)
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array_shift($properties); // Repeat removing first match
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$formatted = array();
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foreach ($properties as $property) {
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preg_match_all('~[^\r\n";]+(?:"[^"\\\]*(?:\\\.[^"\\\]*)*"[^\r\n";]*)*~', $property, $attributes); // Match semicolon separator outside of quoted substrings
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$attributes = (count($attributes) == 0) ? array($property) : reset($attributes); // Remove multi-dimensional array and use the first key
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foreach ($attributes as $attribute) {
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preg_match_all('~[^\r\n"=]+(?:"[^"\\\]*(?:\\\.[^"\\\]*)*"[^\r\n"=]*)*~', $attribute, $values); // Match equals sign separator outside of quoted substrings
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$value = (count($values) == 0) ? NULL : reset($values); // Remove multi-dimensional array and use the first key
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if (is_array($value) && isset($value[1])) {
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$formatted[$value[0]] = trim($value[1], '"'); // Remove double quotes from beginning and end only
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}
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}
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}
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$properties[0] = $formatted; // Assign the keyword property information
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array_unshift($properties, $matches[1]); // Add match to beginning of array
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$matches[1] = $properties;
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}
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return $matches;
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} else {
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return false; // Ignore this match
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}
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}
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/**
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* Return Unix timestamp from iCal date time format
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*
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* @param {string} $icalDate A Date in the format YYYYMMDD[T]HHMMSS[Z] or
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* YYYYMMDD[T]HHMMSS
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*
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* @return {int}
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*/
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public function iCalDateToUnixTimestamp($icalDate)
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{
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$icalDate = str_replace('T', '', $icalDate);
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$icalDate = str_replace('Z', '', $icalDate);
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$pattern = '/([0-9]{4})'; // 1: YYYY
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$pattern .= '([0-9]{2})'; // 2: MM
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$pattern .= '([0-9]{2})'; // 3: DD
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$pattern .= '([0-9]{0,2})'; // 4: HH
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$pattern .= '([0-9]{0,2})'; // 5: MM
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$pattern .= '([0-9]{0,2})/'; // 6: SS
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preg_match($pattern, $icalDate, $date);
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// Unix timestamp can't represent dates before 1970
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if ($date[1] <= 1970) {
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return false;
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}
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// Unix timestamps after 03:14:07 UTC 2038-01-19 might cause an overflow
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// if 32 bit integers are used.
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$timestamp = mktime((int)$date[4], (int)$date[5], (int)$date[6], (int)$date[2], (int)$date[3], (int)$date[1]);
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return $timestamp;
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}
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/**
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* Processes recurrences
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*
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* @author John Grogg <john.grogg@gmail.com>
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* @return {array}
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*/
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public function process_recurrences()
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{
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$array = $this->cal;
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$events = $array['VEVENT'];
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if (empty($events))
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return false;
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foreach ($array['VEVENT'] as $anEvent) {
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if (isset($anEvent['RRULE']) && $anEvent['RRULE'] != '') {
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// Recurring event, parse RRULE and add appropriate duplicate events
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$rrules = array();
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$rrule_strings = explode(';', $anEvent['RRULE']);
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foreach ($rrule_strings as $s) {
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$s_array = explode('=', $s);
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$k = $s_array[0];
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$v = $s_array[1];
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$rrules[$k] = $v;
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}
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// Get frequency
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$frequency = $rrules['FREQ'];
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// Get Start timestamp
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$start_timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTSTART']);
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$end_timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTEND']);
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$event_timestamp_offset = $end_timestamp - $start_timestamp;
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// Get Interval
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$interval = (isset($rrules['INTERVAL']) && $rrules['INTERVAL'] != '') ? $rrules['INTERVAL'] : 1;
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if (in_array($frequency, array('MONTHLY', 'YEARLY')) && isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') {
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// Deal with BYDAY
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$day_number = intval($rrules['BYDAY']);
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if (empty($day_number)) { // Returns 0 when no number defined in BYDAY
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if (!isset($rrules['BYSETPOS'])) {
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$day_number = 1; // Set first as default
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} else if (is_numeric($rrules['BYSETPOS'])) {
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$day_number = $rrules['BYSETPOS'];
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}
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}
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$day_number = ($day_number == -1) ? 6 : $day_number; // Override for our custom key (6 => 'last')
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$week_day = substr($rrules['BYDAY'], -2);
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$day_ordinals = array(1 => 'first', 2 => 'second', 3 => 'third', 4 => 'fourth', 5 => 'fifth', 6 => 'last');
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$weekdays = array('SU' => 'sunday', 'MO' => 'monday', 'TU' => 'tuesday', 'WE' => 'wednesday', 'TH' => 'thursday', 'FR' => 'friday', 'SA' => 'saturday');
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}
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$until_default = date_create('now');
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$until_default->modify($this->default_span . ' year');
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$until_default->setTime(23, 59, 59); // End of the day
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$until_default = date_format($until_default, 'Ymd\THis');
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if (isset($rrules['UNTIL'])) {
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// Get Until
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$until = $this->iCalDateToUnixTimestamp($rrules['UNTIL']);
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} else if (isset($rrules['COUNT'])) {
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$frequency_conversion = array('DAILY' => 'day', 'WEEKLY' => 'week', 'MONTHLY' => 'month', 'YEARLY' => 'year');
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$count_orig = (is_numeric($rrules['COUNT']) && $rrules['COUNT'] > 1) ? $rrules['COUNT'] : 0;
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$count = ($count_orig - 1); // Remove one to exclude the occurrence that initialises the rule
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$count += ($count > 0) ? $count * ($interval - 1) : 0;
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$offset = "+$count " . $frequency_conversion[$frequency];
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$until = strtotime($offset, $start_timestamp);
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if (in_array($frequency, array('MONTHLY', 'YEARLY')) && isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') {
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$dtstart = date_create($anEvent['DTSTART']);
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for ($i = 1; $i <= $count; $i++) {
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$dtstart_clone = clone $dtstart;
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$dtstart_clone->modify('next ' . $frequency_conversion[$frequency]);
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$offset = "{$day_ordinals[$day_number]} {$weekdays[$week_day]} of " . $dtstart_clone->format('F Y H:i:01');
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$dtstart->modify($offset);
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}
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// Jumping X months forwards doesn't mean the end date will fall on the same day defined in BYDAY
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// Use the largest of these to ensure we are going far enough in the future to capture our final end day
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$until = max($until, $dtstart->format('U'));
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}
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unset($offset);
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} else {
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$until = $this->iCalDateToUnixTimestamp($until_default);
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}
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if(!isset($anEvent['EXDATE_array'])){
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$anEvent['EXDATE_array'] = array();
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}
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// Decide how often to add events and do so
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switch ($frequency) {
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case 'DAILY':
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// Simply add a new event each interval of days until UNTIL is reached
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$offset = "+$interval day";
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$recurring_timestamp = strtotime($offset, $start_timestamp);
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while ($recurring_timestamp <= $until) {
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// Add event
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$anEvent['DTSTART'] = date('Ymd\THis', $recurring_timestamp);
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$anEvent['DTEND'] = date('Ymd\THis', $recurring_timestamp + $event_timestamp_offset);
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$search_date = $anEvent['DTSTART'];
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$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) {
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return is_string($val) && strpos($search_date, $val) === 0;
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});
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if (!$is_excluded) {
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$events[] = $anEvent;
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}
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// Move forwards
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$recurring_timestamp = strtotime($offset, $recurring_timestamp);
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}
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break;
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case 'WEEKLY':
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// Create offset
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$offset = "+$interval week";
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// Build list of days of week to add events
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$weekdays = array('SU', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA');
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if (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') {
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$bydays = explode(',', $rrules['BYDAY']);
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} else {
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$weekTemp = array('SU', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA');
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$findDay = $weekTemp[date('w', $start_timestamp)];
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$bydays = array($findDay);
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}
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// Get timestamp of first day of start week
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$week_recurring_timestamp = (date('w', $start_timestamp) == 0) ? $start_timestamp : strtotime('last Sunday ' . date('H:i:s', $start_timestamp), $start_timestamp);
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// Step through weeks
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while ($week_recurring_timestamp <= $until) {
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// Add events for bydays
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$day_recurring_timestamp = $week_recurring_timestamp;
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foreach ($weekdays as $day) {
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// Check if day should be added
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if (in_array($day, $bydays) && $day_recurring_timestamp > $start_timestamp && $day_recurring_timestamp <= $until) {
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// Add event to day
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$anEvent['DTSTART'] = date('Ymd\THis', $day_recurring_timestamp);
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$anEvent['DTEND'] = date('Ymd\THis', $day_recurring_timestamp + $event_timestamp_offset);
|
|
|
|
$search_date = $anEvent['DTSTART'];
|
|
$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) { return is_string($val) && strpos($search_date, $val) === 0; });
|
|
|
|
if (!$is_excluded) {
|
|
$events[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
// Move forwards a day
|
|
$day_recurring_timestamp = strtotime('+1 day', $day_recurring_timestamp);
|
|
}
|
|
|
|
// Move forwards $interval weeks
|
|
$week_recurring_timestamp = strtotime($offset, $week_recurring_timestamp);
|
|
}
|
|
break;
|
|
case 'MONTHLY':
|
|
// Create offset
|
|
$offset = "+$interval month";
|
|
$recurring_timestamp = strtotime($offset, $start_timestamp);
|
|
|
|
if (isset($rrules['BYMONTHDAY']) && $rrules['BYMONTHDAY'] != '') {
|
|
// Deal with BYMONTHDAY
|
|
$monthdays = explode(',', $rrules['BYMONTHDAY']);
|
|
|
|
while ($recurring_timestamp <= $until) {
|
|
foreach ($monthdays as $monthday) {
|
|
// Add event
|
|
$anEvent['DTSTART'] = date('Ym' . sprintf('%02d', $monthday) . '\THis', $recurring_timestamp);
|
|
$anEvent['DTEND'] = date('Ymd\THis', $this->iCalDateToUnixTimestamp($anEvent['DTSTART']) + $event_timestamp_offset);
|
|
|
|
$search_date = $anEvent['DTSTART'];
|
|
$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) { return is_string($val) && strpos($search_date, $val) === 0; });
|
|
|
|
if (!$is_excluded) {
|
|
$events[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
// Move forwards
|
|
$recurring_timestamp = strtotime($offset, $recurring_timestamp);
|
|
}
|
|
} else if (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') {
|
|
$start_time = date('His', $start_timestamp);
|
|
|
|
while ($recurring_timestamp <= $until) {
|
|
$event_start_desc = "{$day_ordinals[$day_number]} {$weekdays[$week_day]} of " . date('F Y H:i:s', $recurring_timestamp);
|
|
$event_start_timestamp = strtotime($event_start_desc);
|
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) {
|
|
$anEvent['DTSTART'] = date('Ymd\T', $event_start_timestamp) . $start_time;
|
|
$anEvent['DTEND'] = date('Ymd\THis', $this->iCalDateToUnixTimestamp($anEvent['DTSTART']) + $event_timestamp_offset);
|
|
|
|
$search_date = $anEvent['DTSTART'];
|
|
$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) { return is_string($val) && strpos($search_date, $val) === 0; });
|
|
|
|
if (!$is_excluded) {
|
|
$events[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
// Move forwards
|
|
$recurring_timestamp = strtotime($offset, $recurring_timestamp);
|
|
}
|
|
}
|
|
break;
|
|
case 'YEARLY':
|
|
// Create offset
|
|
$offset = "+$interval year";
|
|
$recurring_timestamp = strtotime($offset, $start_timestamp);
|
|
$month_names = array(1 => 'January', 2 => 'February', 3 => 'March', 4 => 'April', 5 => 'May', 6 => 'June', 7 => 'July', 8 => 'August', 9 => 'September', 10 => 'October', 11 => 'November', 12 => 'December');
|
|
|
|
// Check if BYDAY rule exists
|
|
if (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') {
|
|
$start_time = date('His', $start_timestamp);
|
|
|
|
while ($recurring_timestamp <= $until) {
|
|
$event_start_desc = "{$day_ordinals[$day_number]} {$weekdays[$week_day]} of {$month_names[$rrules['BYMONTH']]} " . date('Y H:i:s', $recurring_timestamp);
|
|
$event_start_timestamp = strtotime($event_start_desc);
|
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) {
|
|
$anEvent['DTSTART'] = date('Ymd\T', $event_start_timestamp) . $start_time;
|
|
$anEvent['DTEND'] = date('Ymd\THis', $this->iCalDateToUnixTimestamp($anEvent['DTSTART']) + $event_timestamp_offset);
|
|
|
|
$search_date = $anEvent['DTSTART'];
|
|
$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) { return is_string($val) && strpos($search_date, $val) === 0; });
|
|
|
|
if (!$is_excluded) {
|
|
$events[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
// Move forwards
|
|
$recurring_timestamp = strtotime($offset, $recurring_timestamp);
|
|
}
|
|
} else {
|
|
$day = date('d', $start_timestamp);
|
|
$start_time = date('His', $start_timestamp);
|
|
|
|
// Step through years
|
|
while ($recurring_timestamp <= $until) {
|
|
// Add specific month dates
|
|
if (isset($rrules['BYMONTH']) && $rrules['BYMONTH'] != '') {
|
|
$event_start_desc = "$day {$month_names[$rrules['BYMONTH']]} " . date('Y H:i:s', $recurring_timestamp);
|
|
} else {
|
|
$event_start_desc = $day . date('F Y H:i:s', $recurring_timestamp);
|
|
}
|
|
|
|
$event_start_timestamp = strtotime($event_start_desc);
|
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) {
|
|
$anEvent['DTSTART'] = date('Ymd\T', $event_start_timestamp) . $start_time;
|
|
$anEvent['DTEND'] = date('Ymd\THis', $this->iCalDateToUnixTimestamp($anEvent['DTSTART']) + $event_timestamp_offset);
|
|
|
|
$search_date = $anEvent['DTSTART'];
|
|
$is_excluded = array_filter($anEvent['EXDATE_array'], function($val) use ($search_date) { return is_string($val) && strpos($search_date, $val) === 0; });
|
|
|
|
if (!$is_excluded) {
|
|
$events[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
// Move forwards
|
|
$recurring_timestamp = strtotime($offset, $recurring_timestamp);
|
|
}
|
|
}
|
|
break;
|
|
|
|
$events = (isset($count_orig) && count($events) > $count_orig) ? array_slice($events, 0, $count_orig) : $events; // Ensure we abide by COUNT if defined
|
|
}
|
|
}
|
|
}
|
|
$this->cal['VEVENT'] = $events;
|
|
}
|
|
|
|
/**
|
|
* Returns an array of arrays with all events. Every event is an associative
|
|
* array and each property is an element it.
|
|
*
|
|
* @return {array}
|
|
*/
|
|
public function events()
|
|
{
|
|
$array = $this->cal;
|
|
return $array['VEVENT'];
|
|
}
|
|
|
|
/**
|
|
* Returns the calendar name
|
|
*
|
|
* @return {calendar name}
|
|
*/
|
|
public function calendarName()
|
|
{
|
|
return $this->cal['VCALENDAR']['X-WR-CALNAME'];
|
|
}
|
|
|
|
/**
|
|
* Returns the calendar description
|
|
*
|
|
* @return {calendar description}
|
|
*/
|
|
public function calendarDescription()
|
|
{
|
|
return $this->cal['VCALENDAR']['X-WR-CALDESC'];
|
|
}
|
|
|
|
/**
|
|
* Returns an array of arrays with all free/busy events. Every event is
|
|
* an associative array and each property is an element it.
|
|
*
|
|
* @return {array}
|
|
*/
|
|
public function freeBusyEvents()
|
|
{
|
|
$array = $this->cal;
|
|
return $array['VFREEBUSY'];
|
|
}
|
|
|
|
/**
|
|
* Returns a boolean value whether the current calendar has events or not
|
|
*
|
|
* @return {boolean}
|
|
*/
|
|
public function hasEvents()
|
|
{
|
|
return (count($this->events()) > 0) ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Returns false when the current calendar has no events in range, else the
|
|
* events.
|
|
*
|
|
* Note that this function makes use of a UNIX timestamp. This might be a
|
|
* problem on January the 29th, 2038.
|
|
* See http://en.wikipedia.org/wiki/Unix_time#Representing_the_number
|
|
*
|
|
* @param {boolean} $rangeStart Either true or false
|
|
* @param {boolean} $rangeEnd Either true or false
|
|
*
|
|
* @return {mixed}
|
|
*/
|
|
public function eventsFromRange($rangeStart = false, $rangeEnd = false)
|
|
{
|
|
$events = $this->sortEventsWithOrder($this->events(), SORT_ASC);
|
|
|
|
if (!$events) {
|
|
return false;
|
|
}
|
|
|
|
$extendedEvents = array();
|
|
|
|
if ($rangeStart === false) {
|
|
$rangeStart = new DateTime();
|
|
} else {
|
|
$rangeStart = new DateTime($rangeStart);
|
|
}
|
|
|
|
if ($rangeEnd === false or $rangeEnd <= 0) {
|
|
$rangeEnd = new DateTime('2038/01/18');
|
|
} else {
|
|
$rangeEnd = new DateTime($rangeEnd);
|
|
}
|
|
|
|
$rangeStart = $rangeStart->format('U');
|
|
$rangeEnd = $rangeEnd->format('U');
|
|
|
|
// Loop through all events by adding two new elements
|
|
foreach ($events as $anEvent) {
|
|
$timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTSTART']);
|
|
if ($timestamp >= $rangeStart && $timestamp <= $rangeEnd) {
|
|
$extendedEvents[] = $anEvent;
|
|
}
|
|
}
|
|
|
|
return $extendedEvents;
|
|
}
|
|
|
|
/**
|
|
* Returns a boolean value whether the current calendar has events or not
|
|
*
|
|
* @param {array} $events An array with events.
|
|
* @param {array} $sortOrder Either SORT_ASC, SORT_DESC, SORT_REGULAR,
|
|
* SORT_NUMERIC, SORT_STRING
|
|
*
|
|
* @return {boolean}
|
|
*/
|
|
public function sortEventsWithOrder($events, $sortOrder = SORT_ASC)
|
|
{
|
|
$extendedEvents = array();
|
|
|
|
// Loop through all events by adding two new elements
|
|
foreach ($events as $anEvent) {
|
|
if (!array_key_exists('UNIX_TIMESTAMP', $anEvent)) {
|
|
$anEvent['UNIX_TIMESTAMP'] = $this->iCalDateToUnixTimestamp($anEvent['DTSTART']);
|
|
}
|
|
|
|
if (!array_key_exists('REAL_DATETIME', $anEvent)) {
|
|
$anEvent['REAL_DATETIME'] = date('d.m.Y', $anEvent['UNIX_TIMESTAMP']);
|
|
}
|
|
|
|
$extendedEvents[] = $anEvent;
|
|
}
|
|
|
|
foreach ($extendedEvents as $key => $value) {
|
|
$timestamp[$key] = $value['UNIX_TIMESTAMP'];
|
|
}
|
|
array_multisort($timestamp, $sortOrder, $extendedEvents);
|
|
|
|
return $extendedEvents;
|
|
}
|
|
}
|