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<?php |
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/** |
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* This PHP-Class should only read a iCal-File (*.ics), parse it and give 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 <[email protected]> |
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* @license http://www.opensource.org/licenses/mit-license.php MIT License |
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* @version SVN: <svn_id> |
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* @link http://code.google.com/p/ics-parser/ |
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* @example $ical = new ical('MyCal.ics'); |
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* print_r( $ical->events() ); |
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*/ |
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// error_reporting(E_ALL); |
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/** |
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* This is the iCal-class |
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* |
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* @category Parser |
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* @package Ics-parser |
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* @author Martin Thoma <[email protected]> |
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* @license http://www.opensource.org/licenses/mit-license.php MIT License |
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* @link http://code.google.com/p/ics-parser/ |
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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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/* 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} */ $_lastKeyWord; |
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/** |
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* Creates the iCal-Object |
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* |
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* @param {string} $filename The path to the iCal-file |
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* |
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* @return Object The iCal-Object |
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*/ |
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public function __construct($filename) |
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{ |
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if (!$filename) { |
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return false; |
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} |
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$lines = file($filename, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES); |
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if (stristr($lines[0], 'BEGIN:VCALENDAR') === false) { |
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return false; |
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} else { |
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// TODO: Fix multiline-description problem (see http://tools.ietf.org/html/rfc2445#section-4.8.1.5) |
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foreach ($lines as $line) { |
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$line = trim($line); |
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$add = $this->keyValueFromString($line); |
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if ($add === false) { |
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$this->addCalendarComponentWithKeyAndValue($type, false, $line); |
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continue; |
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} |
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list($keyword, $value) = $add; |
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switch ($line) { |
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// http://www.kanzaki.com/docs/ical/vtodo.html |
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case "BEGIN:VTODO": |
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$this->todo_count++; |
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$type = "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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$this->event_count++; |
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$type = "VEVENT"; |
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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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$type = $value; |
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break; |
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case "END:VTODO": // end special text - goto VCALENDAR key |
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case "END:VEVENT": |
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case "END:VCALENDAR": |
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case "END:DAYLIGHT": |
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case "END:VTIMEZONE": |
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case "END:STANDARD": |
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$type = "VCALENDAR"; |
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break; |
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default: |
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$this->addCalendarComponentWithKeyAndValue($type, |
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$keyword, |
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$value); |
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break; |
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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, |
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$keyword, |
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$value) |
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{ |
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if (strstr($keyword, ';')) { |
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// Ignore everything in keyword after a ; (things like Language, etc) |
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$keyword = substr($keyword, 0, strpos($keyword, ";")); |
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} |
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if ($keyword == false) { |
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$keyword = $this->last_keyword; |
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switch ($component) { |
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case 'VEVENT': |
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$value = $this->cal[$component][$this->event_count - 1] |
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[$keyword].$value; |
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break; |
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case 'VTODO' : |
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$value = $this->cal[$component][$this->todo_count - 1] |
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[$keyword].$value; |
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break; |
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} |
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} |
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if (stristr($keyword, "DTSTART") or stristr($keyword, "DTEND")) { |
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$keyword = explode(";", $keyword); |
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$keyword = $keyword[0]; |
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} |
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switch ($component) { |
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case "VTODO": |
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$this->cal[$component][$this->todo_count - 1][$keyword] = $value; |
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//$this->cal[$component][$this->todo_count]['Unix'] = $unixtime; |
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break; |
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case "VEVENT": |
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$this->cal[$component][$this->event_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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preg_match("/([^:]+)[:]([\w\W]*)/", $text, $matches); |
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if (count($matches) == 0) { |
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return false; |
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} |
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$matches = array_splice($matches, 1, 2); |
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return $matches; |
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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], |
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(int)$date[5], |
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(int)$date[6], |
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(int)$date[2], |
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(int)$date[3], |
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(int)$date[1]); |
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return $timestamp; |
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} |
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/** |
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* Processes recurrences |
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* |
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* @author John Grogg <[email protected]> |
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* @return {array} |
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*/ |
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public function process_recurrences() |
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{ |
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$array = $this->cal; |
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$events = $array['VEVENT']; |
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foreach ($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 $s) { |
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list($k,$v) = explode('=', $s); |
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$rrules[$k] = $v; |
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} |
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// Get Start timestamp |
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$start_timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTSTART']); |
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$end_timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTEND']); |
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$event_timestmap_offset = $end_timestamp - $start_timestamp; |
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// Get Interval |
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$interval = (isset($rrules['INTERVAL']) && $rrules['INTERVAL'] != '') ? $rrules['INTERVAL'] : 1; |
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// Get Until |
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$until = $this->iCalDateToUnixTimestamp($rrules['UNTIL']); |
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// Decide how often to add events and do so |
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switch ($rrules['FREQ']) { |
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case 'DAILY': |
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// Simply add a new event each interval of days until UNTIL is reached |
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$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_timestmap_offset); |
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$events[] = $anEvent; |
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// Move forward |
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$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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$weekdays = array('SU','MO','TU','WE','TH','FR','SA'); |
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$bydays = (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') ? explode(',', $rrules['BYDAY']) : array('SU','MO','TU','WE','TH','FR','SA'); |
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// Get timestamp of first day of start week |
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$week_recurring_timestamp = (date('w', $start_timestamp) == 0) ? $start_timestamp : strtotime('last Sunday '.date('H:i:s',$start_timestamp), $start_timestamp); |
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269
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// Step through weeks |
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while ($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_timestmap_offset); |
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$events[] = $anEvent; |
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280
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} |
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281
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// Move forward a day |
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282
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$day_recurring_timestamp = strtotime('+1 day',$day_recurring_timestamp); |
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283
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} |
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284
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// Move forward $interaval weeks |
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285
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$week_recurring_timestamp = strtotime($offset,$week_recurring_timestamp); |
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286
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} |
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287
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break; |
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288
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case 'MONTHLY': |
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289
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// Create offset |
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290
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$offset = "+$interval month"; |
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$recurring_timestamp = strtotime($offset, $start_timestamp); |
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if (isset($rrules['BYMONTHDAY']) && $rrules['BYMONTHDAY'] != '') { |
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// Deal with BYMONTHDAY |
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294
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while ($recurring_timestamp <= $until) { |
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// Add event |
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$anEvent['DTSTART'] = date('Ym'.sprintf('%02d',$rrules['BYMONTHDAY']).'\THis',$recurring_timestamp); |
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$anEvent['DTEND'] = date('Ymd\THis',$this->iCalDateToUnixTimestamp($anEvent['DTSTART'])+$event_timestmap_offset); |
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$events[] = $anEvent; |
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// Move forward |
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300
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$recurring_timestamp = strtotime($offset,$recurring_timestamp); |
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} |
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302
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} elseif (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') { |
|
303
|
|
|
$start_time = date('His',$start_timestamp); |
|
304
|
|
|
// Deal with BYDAY |
|
305
|
|
|
$day_number = substr($rrules['BYDAY'], 0, 1); |
|
306
|
|
|
$week_day = substr($rrules['BYDAY'], 1); |
|
307
|
|
|
$day_cardinals = array(1 => 'first', 2 => 'second', 3 => 'third', 4 => 'fourth', 5 => 'fifth'); |
|
308
|
|
|
$weekdays = array('SU' => 'sunday','MO' => 'monday','TU' => 'tuesday','WE' => 'wednesday','TH' => 'thursday','FR' => 'friday','SA' => 'saturday'); |
|
309
|
|
|
while ($recurring_timestamp <= $until) { |
|
310
|
|
|
$event_start_desc = "{$day_cardinals[$day_number]} {$weekdays[$week_day]} of ".date('F',$recurring_timestamp)." ".date('Y',$recurring_timestamp)." ".date('H:i:s',$recurring_timestamp); |
|
311
|
|
|
$event_start_timestamp = strtotime($event_start_desc); |
|
312
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) { |
|
313
|
|
|
$anEvent['DTSTART'] = date('Ymd\T',$event_start_timestamp).$start_time; |
|
314
|
|
|
$anEvent['DTEND'] = date('Ymd\THis',$this->iCalDateToUnixTimestamp($anEvent['DTSTART'])+$event_timestmap_offset); |
|
315
|
|
|
$events[] = $anEvent; |
|
316
|
|
|
} |
|
317
|
|
|
// Move forward |
|
318
|
|
|
$recurring_timestamp = strtotime($offset,$recurring_timestamp); |
|
319
|
|
|
} |
|
320
|
|
|
} |
|
321
|
|
|
break; |
|
322
|
|
|
case 'YEARLY': |
|
323
|
|
|
// Create offset |
|
324
|
|
|
$offset = "+$interval year"; |
|
325
|
|
|
$recurring_timestamp = strtotime($offset, $start_timestamp); |
|
326
|
|
|
$month_names = array(1=>"January", 2=>"Februrary", 3=>"March", 4=>"April", 5=>"May", 6=>"June", 7=>"July", 8=>"August", 9=>"September", 10=>"October", 11=>"November", 12=>"December"); |
|
327
|
|
|
// HACK: Exchange doesn't set a correct UNTIL for yearly events, so just go 2 years out |
|
328
|
|
|
$until = strtotime('+2 year',$start_timestamp); |
|
329
|
|
|
// Check if BYDAY rule exists |
|
330
|
|
|
if (isset($rrules['BYDAY']) && $rrules['BYDAY'] != '') { |
|
331
|
|
|
$start_time = date('His',$start_timestamp); |
|
332
|
|
|
// Deal with BYDAY |
|
333
|
|
|
$day_number = substr($rrules['BYDAY'], 0, 1); |
|
334
|
|
|
$month_day = substr($rrules['BYDAY'], 1); |
|
335
|
|
|
$day_cardinals = array(1 => 'first', 2 => 'second', 3 => 'third', 4 => 'fourth', 5 => 'fifth'); |
|
336
|
|
|
$weekdays = array('SU' => 'sunday','MO' => 'monday','TU' => 'tuesday','WE' => 'wednesday','TH' => 'thursday','FR' => 'friday','SA' => 'saturday'); |
|
337
|
|
|
while ($recurring_timestamp <= $until) { |
|
338
|
|
|
$event_start_desc = "{$day_cardinals[$day_number]} {$weekdays[$month_day]} of {$month_names[$rrules['BYMONTH']]} ".date('Y',$recurring_timestamp)." ".date('H:i:s',$recurring_timestamp); |
|
339
|
|
|
$event_start_timestamp = strtotime($event_start_desc); |
|
340
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) { |
|
341
|
|
|
$anEvent['DTSTART'] = date('Ymd\T',$event_start_timestamp).$start_time; |
|
342
|
|
|
$anEvent['DTEND'] = date('Ymd\THis',$this->iCalDateToUnixTimestamp($anEvent['DTSTART'])+$event_timestmap_offset); |
|
343
|
|
|
$events[] = $anEvent; |
|
344
|
|
|
} |
|
345
|
|
|
// Move forward |
|
346
|
|
|
$recurring_timestamp = strtotime($offset,$recurring_timestamp); |
|
347
|
|
|
} |
|
348
|
|
|
} else { |
|
349
|
|
|
$day = date('d',$start_timestamp); |
|
350
|
|
|
// Step throuhg years adding specific month dates |
|
351
|
|
|
while ($recurring_timestamp <= $until) { |
|
352
|
|
|
$event_start_desc = "$day {$month_names[$rrules['BYMONTH']]} ".date('Y',$recurring_timestamp)." ".date('H:i:s',$recurring_timestamp); |
|
353
|
|
|
$event_start_timestamp = strtotime($event_start_desc); |
|
354
|
|
|
if ($event_start_timestamp > $start_timestamp && $event_start_timestamp < $until) { |
|
355
|
|
|
$anEvent['DTSTART'] = date('Ymd\T',$event_start_timestamp).$start_time; |
|
356
|
|
|
$anEvent['DTEND'] = date('Ymd\THis',$this->iCalDateToUnixTimestamp($anEvent['DTSTART'])+$event_timestmap_offset); |
|
357
|
|
|
$events[] = $anEvent; |
|
358
|
|
|
} |
|
359
|
|
|
// Move forward |
|
360
|
|
|
$recurring_timestamp = strtotime($offset,$recurring_timestamp); |
|
361
|
|
|
} |
|
362
|
|
|
} |
|
363
|
|
|
break; |
|
364
|
|
|
} |
|
365
|
|
|
} |
|
366
|
|
|
} |
|
367
|
|
|
$this->cal['VEVENT'] = $events; |
|
368
|
|
|
} |
|
369
|
|
|
|
|
370
|
|
|
/** |
|
371
|
|
|
* Returns an array of arrays with all events. Every event is an associative |
|
372
|
|
|
* array and each property is an element it. |
|
373
|
|
|
* |
|
374
|
|
|
* @return {array} |
|
375
|
|
|
*/ |
|
376
|
|
|
public function events() |
|
377
|
|
|
{ |
|
378
|
|
|
$array = $this->cal; |
|
379
|
|
|
return $array['VEVENT']; |
|
380
|
|
|
} |
|
381
|
|
|
|
|
382
|
|
|
/** |
|
383
|
|
|
* Returns a boolean value whether thr current calendar has events or not |
|
384
|
|
|
* |
|
385
|
|
|
* @return {boolean} |
|
386
|
|
|
*/ |
|
387
|
|
|
public function hasEvents() |
|
388
|
|
|
{ |
|
389
|
|
|
return ( count($this->events()) > 0 ? true : false ); |
|
390
|
|
|
} |
|
391
|
|
|
|
|
392
|
|
|
/** |
|
393
|
|
|
* Returns false when the current calendar has no events in range, else the |
|
394
|
|
|
* events. |
|
395
|
|
|
* |
|
396
|
|
|
* Note that this function makes use of a UNIX timestamp. This might be a |
|
397
|
|
|
* problem on January the 29th, 2038. |
|
398
|
|
|
* See http://en.wikipedia.org/wiki/Unix_time#Representing_the_number |
|
399
|
|
|
* |
|
400
|
|
|
* @param {boolean} $rangeStart Either true or false |
|
401
|
|
|
* @param {boolean} $rangeEnd Either true or false |
|
402
|
|
|
* |
|
403
|
|
|
* @return {mixed} |
|
404
|
|
|
*/ |
|
405
|
|
|
public function eventsFromRange($rangeStart = false, $rangeEnd = false) |
|
406
|
|
|
{ |
|
407
|
|
|
$events = $this->sortEventsWithOrder($this->events(), SORT_ASC); |
|
408
|
|
|
|
|
409
|
|
|
if (!$events) { |
|
410
|
|
|
return false; |
|
411
|
|
|
} |
|
412
|
|
|
|
|
413
|
|
|
$extendedEvents = array(); |
|
414
|
|
|
|
|
415
|
|
|
if ($rangeStart === false) { |
|
416
|
|
|
$rangeStart = new DateTime(); |
|
417
|
|
|
} else { |
|
418
|
|
|
$rangeStart = new DateTime($rangeStart); |
|
419
|
|
|
} |
|
420
|
|
|
|
|
421
|
|
|
if ($rangeEnd === false or $rangeEnd <= 0) { |
|
422
|
|
|
$rangeEnd = new DateTime('2038/01/18'); |
|
423
|
|
|
} else { |
|
424
|
|
|
$rangeEnd = new DateTime($rangeEnd); |
|
425
|
|
|
} |
|
426
|
|
|
|
|
427
|
|
|
$rangeStart = $rangeStart->format('U'); |
|
428
|
|
|
$rangeEnd = $rangeEnd->format('U'); |
|
429
|
|
|
|
|
430
|
|
|
|
|
431
|
|
|
|
|
432
|
|
|
// loop through all events by adding two new elements |
|
433
|
|
|
foreach ($events as $anEvent) { |
|
434
|
|
|
$timestamp = $this->iCalDateToUnixTimestamp($anEvent['DTSTART']); |
|
435
|
|
|
if ($timestamp >= $rangeStart && $timestamp <= $rangeEnd) { |
|
436
|
|
|
$extendedEvents[] = $anEvent; |
|
437
|
|
|
} |
|
438
|
|
|
} |
|
439
|
|
|
|
|
440
|
|
|
return $extendedEvents; |
|
441
|
|
|
} |
|
442
|
|
|
|
|
443
|
|
|
/** |
|
444
|
|
|
* Returns a boolean value whether thr current calendar has events or not |
|
445
|
|
|
* |
|
446
|
|
|
* @param {array} $events An array with events. |
|
447
|
|
|
* @param {array} $sortOrder Either SORT_ASC, SORT_DESC, SORT_REGULAR, |
|
448
|
|
|
* SORT_NUMERIC, SORT_STRING |
|
449
|
|
|
* |
|
450
|
|
|
* @return {boolean} |
|
451
|
|
|
*/ |
|
452
|
|
|
public function sortEventsWithOrder($events, $sortOrder = SORT_ASC) |
|
453
|
|
|
{ |
|
454
|
|
|
$extendedEvents = array(); |
|
455
|
|
|
|
|
456
|
|
|
// loop through all events by adding two new elements |
|
457
|
|
|
foreach ($events as $anEvent) { |
|
458
|
|
|
if (!array_key_exists('UNIX_TIMESTAMP', $anEvent)) { |
|
459
|
|
|
$anEvent['UNIX_TIMESTAMP'] = |
|
460
|
|
|
$this->iCalDateToUnixTimestamp($anEvent['DTSTART']); |
|
461
|
|
|
} |
|
462
|
|
|
|
|
463
|
|
|
if (!array_key_exists('REAL_DATETIME', $anEvent)) { |
|
464
|
|
|
$anEvent['REAL_DATETIME'] = |
|
465
|
|
|
date("d.m.Y", $anEvent['UNIX_TIMESTAMP']); |
|
466
|
|
|
} |
|
467
|
|
|
|
|
468
|
|
|
$extendedEvents[] = $anEvent; |
|
469
|
|
|
} |
|
470
|
|
|
|
|
471
|
|
|
foreach ($extendedEvents as $key => $value) { |
|
472
|
|
|
$timestamp[$key] = $value['UNIX_TIMESTAMP']; |
|
473
|
|
|
} |
|
474
|
|
|
array_multisort($timestamp, $sortOrder, $extendedEvents); |
|
475
|
|
|
|
|
476
|
|
|
return $extendedEvents; |
|
477
|
|
|
} |
|
478
|
|
|
} |
|
479
|
|
|
?> |
|
480
|
|
|
|
lochmueller /
calendarize
