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PhutilCalendarRecurrenceList.php
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			<?php

			final class PhutilCalendarRecurrenceList
			extends PhutilCalendarRecurrenceSource {

			private $dates = array();
			private $order;

			public function setDates(array $dates) {
			assert_instances_of($dates, 'PhutilCalendarDateTime');
			$this->dates = $dates;
			return $this;
			}

			public function getDates() {
			return $this->dates;
			}

			public function resetSource() {
			foreach ($this->getDates() as $date) {
			$date->setViewerTimezone($this->getViewerTimezone());
			}

			$order = msort($this->getDates(), 'getEpoch');
			$order = array_reverse($order);
			$this->order = $order;

			return $this;
			}

			public function getNextEvent($cursor) {
			while ($this->order) {
			$next = array_pop($this->order);
			if ($next->getEpoch() >= $cursor) {
			return $next;
			}
			}

			return null;
			}


			}