Add ical Library
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<?php if(!defined('APP_ROOT')) exit('No direct script access allowed');
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date_default_timezone_set('America/Chicago');
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class Anvil_iCal {
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  var $calURL = '';
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  var $rawCalendar = '';
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  var $iCal;
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  var $dev_mode = true;
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  function __construct($calURL=false) { 
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    if($calURL) {
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      $this->calURL = $calURL;
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      $this->fetchCalendar();
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      $this->createCalendarFromRaw();
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    }
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  }
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  function fetchCalendar() {
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    $ch = curl_init($this->calURL);
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    curl_setopt($ch, CURLOPT_HEADER, 0);
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    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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    $this->rawCalendar = curl_exec($ch);
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    curl_close($ch);
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  }
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  function createCalendarFromRaw() {
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    $this->iCal = new ICal($this->rawCalendar);
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  }
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  function getCalendar() {
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    return $this->iCal;
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  }
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  function getTimezone() {
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    return new DateTimeZone($this->iCal->cal['VCALENDAR']['X-WR-TIMEZONE']);
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  }
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  function getEvents() {
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    if(isset($this->iCal->cal['VEVENT'])) {
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      return $this->iCal->cal['VEVENT'];
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    }
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    return [];
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  }
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  function getUpcomingEvents() {
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    $ret = [];
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    $earliest = new DateTime(date('Y-m-d H:i:s', strtotime('now')));
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    $allEvents = $this->iCal->cal['VEVENT'];
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    foreach($allEvents as $anEvent) {
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      $tstDt = new DateTime(date('Y-m-d H:i:s', strtotime($anEvent['DTSTART'])));
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      if($tstDt <= $earliest) { continue; }
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      $ret[] = $anEvent;
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    }
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    return $ret;
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  }
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  function getNextEvent() {
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    $earliest = new DateTime(date('Y-m-d H:i:s', strtotime('2016-04-21 17:00:00')));
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    $dt = new DateTime();
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    foreach($this->getEvents() as $anEv) {
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      $tstDt = new DateTime(date('Y-m-d H:i:s', strtotime($anEv['DTSTART'])));
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      // $tstDt is the _STARTING_ date of the event
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      if($tstDt <= $earliest) { continue; }
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      $diff = $dt->diff($tstDt);
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      if(!isset($nextDt)) {
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        $nextDt = $tstDt;
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        $ret = $anEv;
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      } else if($dt < $tstDt && $tstDt < $nextDt) {
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        $nextDt = $tstDt;
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        $ret = $anEv;
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      }
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    }
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    if(isset($ret)) {
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      return $ret;
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    }
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    return false;
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  }
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  // getNextEventWithCurrent will get the next event, including ones that
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  // are occurring right now, but haven't ended yet.
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  function getNextEventWithCurrent() {
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    $dt = new DateTime();
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    foreach($this->getEvents() as $anEv) {
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      $tstDt = new DateTime(date('Y-m-d H:i:s', strtotime($anEv['DTSTART'])));
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      // $tstDt is the _STARTING_ date of the event
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      $diff = $dt->diff($tstDt);
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      if(!isset($nextDt)) {
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        $nextDt = $tstDt;
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      } else if($dt < $tstDt && $tstDt < $nextDt) {
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        $nextDt = $tstDt;
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      }
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    }
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  }
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}
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class ICal {
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  private $timezone = 'UTC';
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  private $events = [];
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  private $recEvents = [];
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  public function __construct($ICalString) {
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    if(!$ICalString) {
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      return false;
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    }
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    $lines = explode("\r\n", $ICalString);
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    if(stristr($lines[0], 'BEGIN:VCALENDAR') === false) {
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      return false;
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    }
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    // First, fix all multiline values
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    $badIdx = [];
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    foreach($lines as $idx => &$line) {
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      $line = ltrim(str_replace('\,',',',$line));
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      //$line = ltrim(str_replace('','<br/>',$line));
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      $add  = $this->keyValueFromString($line);
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      if ($add === false) {
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        $badIdx[] = $idx;
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      } 
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    }
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    $newLines = [];
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    $lastGood = '';
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    foreach($lines as $idx => $aLine) {
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      if(in_array($idx, $badIdx)) {
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        $lastGood .= $aLine;
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      } else {
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        if(!empty($lastGood)) {
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          $newLines[] = $lastGood;
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          $lastGood = '';
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        }
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        $lastGood = $aLine;
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      }
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    }
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    $newLines[] = $lastGood;
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    $lines = $newLines;
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    for($idx = 0; $idx < count($lines); $idx++) {
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      $line = $lines[$idx];
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      if($line == 'BEGIN:VTIMEZONE') {
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        $i = $this->_parseFindNext('END:VTIMEZONE', $lines, $idx);
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        $this->timezone = $this->parseTimezone($i);
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      }
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      if($line == 'BEGIN:VEVENT') {
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        $i = $this->_parseFindNext('END:VEVENT', $lines, $idx);
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        if($i !== false) {
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          $newEvent = $this->parseEvent($i);
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          if($newEvent->isValid()) {
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            $this->events[] = $newEvent;
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          }
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        }
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      }
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    }
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  }
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  public function getEvents() {
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    return $this->events;
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  }
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  public function getEventsInRange($stDtTm, $endDtTm) {
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    $ret = [];
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    foreach($this->events as $anEv) {
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      $evStTm = $anEv->getStartDttm();
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      $evEndTm = $anEv->getEndDttm();
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      if($anEv->getRecurFlag() && $evStTm < $endDtTm) {
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        $evLength = $evStTm->diff($evEndTm);
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        // Recurrences are defined by the original startDttm
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        $recurUntil = $anEv->getRecurUntil();
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        if(!empty($recurUntil)) {
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          // So there is an end date
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          if($recurUntil < $stDtTm) {
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            // Past the recur until
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            continue;
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          }
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        }
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        $recurFreq = $anEv->getRecurFrequency();
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        if(!empty($recurFreq)) {
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          switch($recurFreq) {
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          case 'WEEKLY':
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            $dow = $anEv->getRecurByDay();
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            $newArr = [];
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            if(empty($dow)) {
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              // If 'recurByDay' is blank, just recur on the event start date
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              array_push($newArr, $evStTm->format('w'));
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            } else {
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              if(is_array($dow)) {
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                foreach($dow as &$ad) {
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                  $ad = $this->shortDayToDOWNum($ad);
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                  array_push($newArr, $ad);
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                }
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              } else {
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                $ad = $this->shortDayToDOWNum($dow);
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                array_push($newArr, $ad);
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              }
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            }
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            $dow = $newArr;
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            $evStDay = new DateTime($evStTm->format('Y-m-d'));
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            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
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                $tstDt <= $endDtTm; 
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                $tstDt->add(new DateInterval('P1D'))) {
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              if(!in_array($tstDt->format('w'), $dow)) { continue; } // Same day of week
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              if($tstDt < $evStDay) { continue; }            // After the recurrence started
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              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
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							$recurInt = $anEv->getRecurInterval();
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							if($recurInt != 0) {
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								// Figure out how many 'FREQ's have passed (weeks in this case)
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								// 7 Days in a Week, recurring every $recurInt weeks
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								$recurInt *= 7;
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								$daysSince = $tstDt->diff($evStTm)->days;
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								if($daysSince%$recurInt != 0) {
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									continue;
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								}
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							}
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							$recurCnt = $anEv->getRecurCount();
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							if($recurCnt != 0) {
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								// Recurring weekly
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								$recurInt = 7;
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								$daysSince = $tstDt->diff($evStDay)->days + 1;
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								if($daysSince/$recurInt > $recurCnt) {
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									// Too many occurrences already
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									continue;
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								}
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							}
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              $tstDt->setTime($evStTm->format('H'), $evStTm->format('i'), $evStTm->format('s'));
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              // The recurrence appears to be valid, check the exception dates
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              if($anEv->isExceptionDate($tstDt)) {
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                // An exception for this date
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                continue;
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              }
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              $rEv = new ICalEvent();
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              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
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              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
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              $rEv->setDescription($anEv->getDescription());
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              $rEv->setSummary($anEv->getSummary());
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              $rEv->setLocation($anEv->getLocation());
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              $rEv->setICalTag("RecurringCopy", "true");
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              $ret[] = $rEv;
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            }
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            break;
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          case 'MONTHLY':
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            // TODO: TEST
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            $dom = $evStTm->format('d');
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            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
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                $tstDt <= $endDtTm; 
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                $tstDt->add(new DateInterval('P1M'))) {
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              if($tstDt->format('d') != $dom) { continue; } // Same day of month
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              if($tstDt < $evStTm) { continue; }            // After the recurrence started
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              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
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							// TODO: Check Recurrence Interval
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              $tstDt->setTime($evStTm->format('H'), $evStTm->format('i'), $evStTm->format('s'));
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              $evLength = $evStTm->diff($evEndTm);
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              $rEv = new ICalEvent();
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              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
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              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
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              $rEv->setDescription($anEv->getDescription());
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              $rEv->setSummary($anEv->getSummary());
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              $rEv->setLocation($anEv->getLocation());
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              $rEv->setICalTag("RecurringCopy", "true");
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              $ret[] = $rEv;
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            }
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            break;
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          case 'YEARLY':
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            // TODO: TEST
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            $doy = $evStTm->format('z');
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            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
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                $tstDt <= $endDtTm; 
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                $tstDt->add(new DateInterval('P1Y'))) {
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              if($tstDt->format('z') != $doy) { continue; } // Same day of year
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              if($tstDt < $evStTm) { continue; }            // After the recurrence started
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		||||
              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
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							// TODO: Check Recurrence Interval
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              $tstDt->setTime($evStTm->format('H'), $evStTm->format('i'), $evStTm->format('s'));
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              $evLength = $evStTm->diff($evEndTm);
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              $rEv = new ICalEvent();
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              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
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              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
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		||||
              $rEv->setDescription($anEv->getDescription());
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		||||
              $rEv->setSummary($anEv->getSummary());
 | 
			
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              $rEv->setLocation($anEv->getLocation());
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		||||
              $rEv->setICalTag("RecurringCopy", "true");
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              $ret[] = $rEv;
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            }
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            break;
 | 
			
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          case 'DAILY':
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            // TODO: TEST
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            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
 | 
			
		||||
                $tstDt <= $endDtTm; 
 | 
			
		||||
                $tstDt->add(new DateInterval('P1D'))) {
 | 
			
		||||
              if($tstDt < $evStTm) { continue; }            // After the recurrence started
 | 
			
		||||
              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
 | 
			
		||||
							// TODO: Check Recurrence Interval
 | 
			
		||||
              $tstDt->setTime($evStTm->format('H'), $evStTm->format('i'), $evStTm->format('s'));
 | 
			
		||||
              $evLength = $evStTm->diff($evEndTm);
 | 
			
		||||
              $rEv = new ICalEvent();
 | 
			
		||||
              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setDescription($anEv->getDescription());
 | 
			
		||||
              $rEv->setSummary($anEv->getSummary());
 | 
			
		||||
              $rEv->setLocation($anEv->getLocation());
 | 
			
		||||
              $rEv->setICalTag("RecurringCopy", "true");
 | 
			
		||||
              $ret[] = $rEv;
 | 
			
		||||
            }
 | 
			
		||||
            break;
 | 
			
		||||
          case 'HOURLY':
 | 
			
		||||
            // TODO: TEST
 | 
			
		||||
            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
 | 
			
		||||
                $tstDt <= $endDtTm; 
 | 
			
		||||
                $tstDt->add(new DateInterval('PT1H'))) {
 | 
			
		||||
              if($tstDt < $evStTm) { continue; }            // After the recurrence started
 | 
			
		||||
              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
 | 
			
		||||
							// TODO: Check Recurrence Interval
 | 
			
		||||
              $evLength = $evStTm->diff($evEndTm);
 | 
			
		||||
              $rEv = new ICalEvent();
 | 
			
		||||
              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setDescription($anEv->getDescription());
 | 
			
		||||
              $rEv->setSummary($anEv->getSummary());
 | 
			
		||||
              $rEv->setLocation($anEv->getLocation());
 | 
			
		||||
              $rEv->setICalTag("RecurringCopy", "true");
 | 
			
		||||
              $ret[] = $rEv;
 | 
			
		||||
            }
 | 
			
		||||
            break;
 | 
			
		||||
          case 'MINUTELY':
 | 
			
		||||
            // TODO: TEST
 | 
			
		||||
            for($tstDt = new DateTime($stDtTm->format(DATE_RFC3339)); 
 | 
			
		||||
                $tstDt <= $endDtTm; 
 | 
			
		||||
                $tstDt->add(new DateInterval('PT1M'))) {
 | 
			
		||||
              if($tstDt < $evStTm) { continue; }            // After the recurrence started
 | 
			
		||||
              if(!empty($recurUntil) && $tstDt > $recurUntil) { continue; } // Before it ended
 | 
			
		||||
							// TODO: Check Recurrence Interval
 | 
			
		||||
              $evLength = $evStTm->diff($evEndTm);
 | 
			
		||||
              $rEv = new ICalEvent();
 | 
			
		||||
              $rEv->setStartDttm(new DateTime($tstDt->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setEndDttm(new DateTime($tstDt->add($evLength)->format(DATE_RFC3339)));
 | 
			
		||||
              $rEv->setDescription($anEv->getDescription());
 | 
			
		||||
              $rEv->setSummary($anEv->getSummary());
 | 
			
		||||
              $rEv->setLocation($anEv->getLocation());
 | 
			
		||||
              $rEv->setICalTag("RecurringCopy", "true");
 | 
			
		||||
              $ret[] = $rEv;
 | 
			
		||||
            }
 | 
			
		||||
            break;
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
      } else {
 | 
			
		||||
        // Normal Event, just check the dates
 | 
			
		||||
        // If any part of the event takes place in the range, append it
 | 
			
		||||
        if(($evStTm >= $stDtTm && $evStTm < $endDtTm) 
 | 
			
		||||
            || ($evEndTm > $stDtTm && $evEndTm <= $endDtTm)) {
 | 
			
		||||
          $ret[] = $anEv;  
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
    usort($ret, "_eventSortHelper");
 | 
			
		||||
    return $ret;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
  public function parseTimezone($lines) {
 | 
			
		||||
    $defaultTZ = 'UTC';
 | 
			
		||||
    foreach($lines as $line) {
 | 
			
		||||
      $line = trim($line);
 | 
			
		||||
      if($line == "END:VTIMEZONE") {
 | 
			
		||||
        break;
 | 
			
		||||
      }
 | 
			
		||||
      $add  = $this->keyValueFromString($line);
 | 
			
		||||
      if ($add === false) {
 | 
			
		||||
        continue;
 | 
			
		||||
      } 
 | 
			
		||||
      list($keyword, $value) = $add;
 | 
			
		||||
      if($keyword == 'TZID') {
 | 
			
		||||
        return $value;
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
    return $defaultTZ;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
  // Parses and returns the first event out of $lines
 | 
			
		||||
  public function parseEvent($lines) {
 | 
			
		||||
    $newEvent = new ICalEvent();
 | 
			
		||||
    foreach($lines as $line) {
 | 
			
		||||
      $line = trim($line);
 | 
			
		||||
      if($line == 'END:VEVENT') {
 | 
			
		||||
        break;
 | 
			
		||||
      }
 | 
			
		||||
      $add = $this->keyValueFromString($line);
 | 
			
		||||
      if($add === FALSE) {
 | 
			
		||||
        continue;
 | 
			
		||||
      }
 | 
			
		||||
      list($keyword, $value) = $add;
 | 
			
		||||
      $newEvent->setICalTag($keyword, $value);
 | 
			
		||||
      if(stristr($keyword, "DTSTART") 
 | 
			
		||||
            || stristr($keyword, "DTEND")
 | 
			
		||||
            || stristr($keyword, "EXDATE")) {
 | 
			
		||||
        $tz = 'UTC';
 | 
			
		||||
        if(stristr($keyword, ';')) {
 | 
			
		||||
          $keywordPts = explode(';', $keyword);
 | 
			
		||||
          $keyword = $keywordPts[0];
 | 
			
		||||
          $tzPts = $keywordPts[1];
 | 
			
		||||
          $tzPts = explode('=', $tzPts);
 | 
			
		||||
          if($tzPts[0] == 'TZID') {
 | 
			
		||||
            $tz = $tzPts[1];
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
        if($keyword == 'EXDATE') {
 | 
			
		||||
          // Exception Dates (could be an array)
 | 
			
		||||
          if(stristr($value, ',')) {
 | 
			
		||||
            $exDates = explode(',', $value);
 | 
			
		||||
            foreach($exDates as $exDt) {
 | 
			
		||||
              $date = new DateTime($exDt, new DateTimeZone($tz));
 | 
			
		||||
              $date->setTimezone(new DateTimeZone($this->timezone));
 | 
			
		||||
              $newEvent->addExceptionDate($date);
 | 
			
		||||
            }
 | 
			
		||||
          } else {
 | 
			
		||||
            $date = new DateTime($value, new DateTimeZone($tz));
 | 
			
		||||
            $date->setTimezone(new DateTimeZone($this->timezone));
 | 
			
		||||
            $newEvent->addExceptionDate($date);
 | 
			
		||||
          }
 | 
			
		||||
        } else {
 | 
			
		||||
          $date = new DateTime($value, new DateTimeZone($tz));
 | 
			
		||||
          $date->setTimezone(new DateTimeZone($this->timezone));
 | 
			
		||||
          if($keyword == 'DTSTART') {
 | 
			
		||||
            $newEvent->setStartDttm($date);
 | 
			
		||||
          } else if($keyword == 'DTEND') {
 | 
			
		||||
            $newEvent->setEndDttm($date);
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
        continue;
 | 
			
		||||
      }
 | 
			
		||||
      switch($keyword) {
 | 
			
		||||
      case 'RRULE': // Recurrence Rule
 | 
			
		||||
        // http://www.kanzaki.com/docs/ical/rrule.html
 | 
			
		||||
        $pts = explode(';', $value);
 | 
			
		||||
        foreach($pts as $recRules) {
 | 
			
		||||
          $recRulePts = explode('=', $recRules);
 | 
			
		||||
          switch($recRulePts[0]) {
 | 
			
		||||
          case 'FREQ': // (MINUTELY, HOURLY, DAILY, WEEKLY, MONTHLY, YEARLY)
 | 
			
		||||
            $newEvent->setRecurFrequency($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'INTERVAL': // 1 out of every x of FREQ that it recurs
 | 
			
		||||
            $newEvent->setRecurInterval($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'COUNT': // Number of times it recurs
 | 
			
		||||
            $newEvent->setRecurCount($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'UNTIL': // Recur until this date
 | 
			
		||||
            // TODO: Create a DateTime
 | 
			
		||||
            $date = new DateTime($recRulePts[1], new DateTimeZone('UTC'));
 | 
			
		||||
            $date->setTimezone(new DateTimeZone($this->timezone));
 | 
			
		||||
            $newEvent->setRecurUntil($date);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'BYMONTH': // idx of months that it recurs (1 indexed)
 | 
			
		||||
            $newEvent->setRecurByMonth($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'BYDAY': // (SU,MO,TU,WE,TH,FR,SA)
 | 
			
		||||
            $newEvent->setRecurByDay($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'BYMONTHDAY': // idx of day of month, 1 indexed, <0 is from end
 | 
			
		||||
            $newEvent->setRecurByMonthDay($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'BYYEARDAY': // idx of day of year
 | 
			
		||||
            $newEvent->setRecurByYearDay($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          case 'WKST': // Week Start?
 | 
			
		||||
            $newEvent->setRecurWkSt($recRulePts[1]);
 | 
			
		||||
            break;
 | 
			
		||||
          }
 | 
			
		||||
        }
 | 
			
		||||
        break;
 | 
			
		||||
      case 'DESCRIPTION': // Event Description
 | 
			
		||||
        $newEvent->setDescription($value);
 | 
			
		||||
        break;
 | 
			
		||||
      case 'LOCATION': // Event Location
 | 
			
		||||
        $newEvent->setLocation($value);
 | 
			
		||||
        break;
 | 
			
		||||
      case 'SUMMARY': // Event Summary
 | 
			
		||||
        $newEvent->setSummary($value);
 | 
			
		||||
        break;
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
    return $newEvent;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function _parseFindNext($needle, $haystack, $start=0) {
 | 
			
		||||
    $ret = [];
 | 
			
		||||
    for($i = $start; $i < count($haystack); $i++) {
 | 
			
		||||
      if(!empty(trim($haystack[$i]))) {
 | 
			
		||||
        $ret[] = $haystack[$i];
 | 
			
		||||
        if($haystack[$i] == $needle) {
 | 
			
		||||
          return $ret;
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
    // Didn't find it.
 | 
			
		||||
    return false;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function keyValueFromString($text) {
 | 
			
		||||
    preg_match("/([^:]+)[:]([\w\W]*)/", $text, $matches);
 | 
			
		||||
    if (count($matches) == 0) {
 | 
			
		||||
      return false;
 | 
			
		||||
    }
 | 
			
		||||
    $matches = array_splice($matches, 1, 2);
 | 
			
		||||
    return $matches;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // shortDayToDOWNum takes a 'Recur By Day' value (SU,MO,TU,WE,TH,FR,SA)
 | 
			
		||||
  public function shortDayToDOWNum($shortDay) {
 | 
			
		||||
    switch($shortDay) {
 | 
			
		||||
    case 'SU': return 0;
 | 
			
		||||
    case 'MO': return 1;
 | 
			
		||||
    case 'TU': return 2;
 | 
			
		||||
    case 'WE': return 3;
 | 
			
		||||
    case 'TH': return 4;
 | 
			
		||||
    case 'FR': return 5;
 | 
			
		||||
    case 'SA': return 6;
 | 
			
		||||
    }
 | 
			
		||||
    return -1;
 | 
			
		||||
  }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
class ICalEvent {
 | 
			
		||||
  private $summary = '';
 | 
			
		||||
  private $description = '';
 | 
			
		||||
  private $location = '';
 | 
			
		||||
  private $isRecurring = false;
 | 
			
		||||
  private $_recurRules = [];
 | 
			
		||||
  private $exceptionDates = [];
 | 
			
		||||
  private $stDtTm;
 | 
			
		||||
  private $endDtTm;
 | 
			
		||||
  private $valid = false;
 | 
			
		||||
 | 
			
		||||
  private $ICalTags = [];
 | 
			
		||||
 | 
			
		||||
  public function __construct() { }
 | 
			
		||||
 | 
			
		||||
  public function setSummary($s) { $this->summary = $s; }
 | 
			
		||||
  public function getSummary() { return $this->summary; }
 | 
			
		||||
 | 
			
		||||
  public function setDescription($s) { $this->description = $s; }
 | 
			
		||||
  public function getDescription() { return $this->description; }
 | 
			
		||||
 | 
			
		||||
  public function setStartDttm($dttm) { $this->stDtTm = $dttm; }
 | 
			
		||||
  public function getStartDttm() { return $this->stDtTm; }
 | 
			
		||||
 | 
			
		||||
  public function setEndDttm($dttm) { $this->endDtTm = $dttm; }
 | 
			
		||||
  public function getEndDttm() { return $this->endDtTm; }
 | 
			
		||||
 | 
			
		||||
  public function setLocation($loc) { $this->location = $loc; }
 | 
			
		||||
  public function getLocation() { return $this->location; }
 | 
			
		||||
 | 
			
		||||
  // getDuration returns a DateInterval for how long this event lasts
 | 
			
		||||
  public function getDuration() {
 | 
			
		||||
    return $this->stDtTm->diff($this->endDtTm);
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function isValid() {
 | 
			
		||||
    return ($this->stDtTm < $this->endDtTm);
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function getRecurFlag() {
 | 
			
		||||
    return $this->isRecurring;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function getRecurRules() {
 | 
			
		||||
    return $this->_recurRules;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function getRecurRule($rule) {
 | 
			
		||||
    if(isset($this->_recurRules[$rule])) {
 | 
			
		||||
      return $this->_recurRules[$rule];
 | 
			
		||||
    }
 | 
			
		||||
    return '';
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // Frequency to recur
 | 
			
		||||
  public function setRecurFrequency($fr) {
 | 
			
		||||
    if($fr == 'MINUTELY' || $fr == 'HOURLY' || $fr == 'DAILY' 
 | 
			
		||||
          || $fr == 'WEEKLY' || $fr == 'MONTHLY' || $fr == 'YEARLY') {
 | 
			
		||||
      $this->_recurRules['frequency'] = $fr;
 | 
			
		||||
      $this->isRecurring = true;
 | 
			
		||||
      return true;
 | 
			
		||||
    }
 | 
			
		||||
    return false;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurFrequency() {
 | 
			
		||||
    return $this->getRecurRule('frequency');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // One out of every $i of Frequency to occur
 | 
			
		||||
  public function setRecurInterval($i) {
 | 
			
		||||
    $this->_recurRules['interval'] = $i;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurInterval() {
 | 
			
		||||
    return $this->getRecurRule('interval');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // How many times it should recur
 | 
			
		||||
  public function setRecurCount($i) {
 | 
			
		||||
    $this->_recurRules['count'] = $i;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurCount() {
 | 
			
		||||
    return $this->getRecurRule('count');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // Date to stop recurring
 | 
			
		||||
  public function setRecurUntil($dt) {
 | 
			
		||||
    $this->_recurRules['until'] = $dt;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurUntil() {
 | 
			
		||||
    return $this->getRecurRule('until');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // array of 1-indexed months to recur on
 | 
			
		||||
  public function setRecurByMonth($mos) {
 | 
			
		||||
    $mos = is_array($mos)?$mos:[$mos];
 | 
			
		||||
    $this->_recurRules['byMonth'] = $mos;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurByMonth() {
 | 
			
		||||
    return $this->getRecurRule('byMonth');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // array of abbreviated days to recur on (SU,MO,TU,WE,TH,FR,SA)
 | 
			
		||||
  public function setRecurByDay($dys) {
 | 
			
		||||
    $dys = is_array($dys)?$dys:[$dys];
 | 
			
		||||
    $this->_recurRules['byDay'] = explode(',',$dys[0]);
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurByDay() {
 | 
			
		||||
    return $this->getRecurRule('byDay');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // arary of 1-indexed day-of-months to recur on
 | 
			
		||||
  public function setRecurByMonthDay($doms) {
 | 
			
		||||
    $doms = is_array($doms)?$doms:[$doms];
 | 
			
		||||
    $this->_recurRules['byMonthDay'] = $doms;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurByMonthDay() {
 | 
			
		||||
    return $this->getRecurRule('byMonthDay');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // array of 1-indexed day-of-years to recur on
 | 
			
		||||
  public function setRecurByYearDay($doys) {
 | 
			
		||||
    $doys = is_array($doys)?$doys:[$doys];
 | 
			
		||||
    $this->_recurRules['byYearDay'] = $doys;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurByYearDay() {
 | 
			
		||||
    return $this->getRecurRule('byYearDay');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  // Set the week start day for the recurrence
 | 
			
		||||
  public function setRecurWkSt($wkst) {
 | 
			
		||||
    $this->_recurRules['wkSt'] = $wkst;
 | 
			
		||||
  }
 | 
			
		||||
  public function getRecurWkSt() {
 | 
			
		||||
    return $this->getRecurRule('wkSt');
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function setICalTag($key, $val) {
 | 
			
		||||
    $this->ICalTags[$key] = $val;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function addExceptionDate($dy) {
 | 
			
		||||
    array_push($this->exceptionDates, $dy);
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  public function isExceptionDate($dy) {
 | 
			
		||||
    foreach($this->exceptionDates as $exDt) {
 | 
			
		||||
      if($dy == $exDt) {
 | 
			
		||||
        return true;
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
    return false;
 | 
			
		||||
  }
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
function _eventSortHelper($a, $b) {
 | 
			
		||||
  if($a->getStartDttm() == $b->getStartDttm()) {
 | 
			
		||||
    return 0;
 | 
			
		||||
  }
 | 
			
		||||
  return ($a->getStartDttm() > $b->getStartDttm())?1:-1;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
		Reference in New Issue
	
	Block a user