PhabricatorCalendarEventDragController.php
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	<?php

	final class PhabricatorCalendarEventDragController
	extends PhabricatorCalendarController {

	public function handleRequest(AphrontRequest $request) {
	$viewer = $request->getViewer();

	$event = id(new PhabricatorCalendarEventQuery())
	->setViewer($viewer)
	->withIDs(array($request->getURIData('id')))
	->requireCapabilities(
	array(
	PhabricatorPolicyCapability::CAN_VIEW,
	PhabricatorPolicyCapability::CAN_EDIT,
	))
	->executeOne();
	if (!$event) {
	return new Aphront404Response();
	}

	if (!$request->validateCSRF()) {
	return new Aphront400Response();
	}

	if ($event->getIsAllDay()) {
	return new Aphront400Response();
	}

	$xactions = array();

	$duration = $event->getDateTo() - $event->getDateFrom();

	$start = $request->getInt('start');
	$start_value = id(AphrontFormDateControlValue::newFromEpoch(
	$viewer,
	$start));

	$end = $start + $duration;
	$end_value = id(AphrontFormDateControlValue::newFromEpoch(
	$viewer,
	$end));


	$xactions[] = id(new PhabricatorCalendarEventTransaction())
	->setTransactionType(
	PhabricatorCalendarEventTransaction::TYPE_START_DATE)
	->setNewValue($start_value);

	$xactions[] = id(new PhabricatorCalendarEventTransaction())
	->setTransactionType(
	PhabricatorCalendarEventTransaction::TYPE_END_DATE)
	->setNewValue($end_value);


	$editor = id(new PhabricatorCalendarEventEditor())
	->setActor($viewer)
	->setContinueOnMissingFields(true)
	->setContentSourceFromRequest($request)
	->setContinueOnNoEffect(true);

	$xactions = $editor->applyTransactions($event, $xactions);

	return id(new AphrontReloadResponse());
	}
	}