PhabricatorProjectColumnRemoveTriggerController.php
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	<?php

	final class PhabricatorProjectColumnRemoveTriggerController
	extends PhabricatorProjectBoardController {

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

	$column = id(new PhabricatorProjectColumnQuery())
	->setViewer($viewer)
	->withIDs(array($id))
	->requireCapabilities(
	array(
	PhabricatorPolicyCapability::CAN_VIEW,
	PhabricatorPolicyCapability::CAN_EDIT,
	))
	->executeOne();
	if (!$column) {
	return new Aphront404Response();
	}

	$done_uri = $column->getWorkboardURI();

	if (!$column->getTriggerPHID()) {
	return $this->newDialog()
	->setTitle(pht('No Trigger'))
	->appendParagraph(
	pht('This column does not have a trigger.'))
	->addCancelButton($done_uri);
	}

	if ($request->isFormPost()) {
	$column_xactions = array();

	$column_xactions[] = $column->getApplicationTransactionTemplate()
	->setTransactionType(
	PhabricatorProjectColumnTriggerTransaction::TRANSACTIONTYPE)
	->setNewValue(null);

	$column_editor = $column->getApplicationTransactionEditor()
	->setActor($viewer)
	->setContentSourceFromRequest($request)
	->setContinueOnNoEffect(true)
	->setContinueOnMissingFields(true);

	$column_editor->applyTransactions($column, $column_xactions);

	return id(new AphrontRedirectResponse())->setURI($done_uri);
	}

	$body = pht('Really remove the trigger from this column?');

	return $this->newDialog()
	->setTitle(pht('Remove Trigger'))
	->appendParagraph($body)
	->addSubmitButton(pht('Remove Trigger'))
	->addCancelButton($done_uri);
	}
	}