RDateIterator.php

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<?php
 
namespace Sabre\VObject\Recur;
 
use DateTimeInterface;
use Iterator;
use Sabre\VObject\DateTimeParser;
 
class RDateIterator implements Iterator {
 
    function __construct($rrule, DateTimeInterface $start) {
 
        $this->startDate = $start;
        $this->parseRDate($rrule);
        $this->currentDate = clone $this->startDate;
 
    }
 
    /* Implementation of the Iterator interface {{{ */
 
    function current() {
 
        if (!$this->valid()) return;
        return clone $this->currentDate;
 
    }
 
    function key() {
 
        return $this->counter;
 
    }
 
    function valid() {
 
        return ($this->counter <= count($this->dates));
 
    }
 
    function rewind() {
 
        $this->currentDate = clone $this->startDate;
        $this->counter = 0;
 
    }
 
    function next() {
 
        $this->counter++;
        if (!$this->valid()) return;
 
        $this->currentDate =
            DateTimeParser::parse(
                $this->dates[$this->counter - 1],
                $this->startDate->getTimezone()
            );
 
    }
 
    /* End of Iterator implementation }}} */
 
    function isInfinite() {
 
        return false;
 
    }
 
    function fastForward(DateTimeInterface $dt) {
 
        while ($this->valid() && $this->currentDate < $dt) {
            $this->next();
        }
 
    }
 
    protected $startDate;
 
    protected $currentDate;
 
    protected $counter = 0;
 
    /* }}} */
 
    protected function parseRDate($rdate) {
 
        if (is_string($rdate)) {
            $rdate = explode(',', $rdate);
        }
 
        $this->dates = $rdate;
 
    }
 
    protected $dates = [];
 
}