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 = [];

}