PhabricatorFileDeleteController.php
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	<?php

	final class PhabricatorFileDeleteController extends PhabricatorFileController {

	private $id;

	public function willProcessRequest(array $data) {
	$this->id = $data['id'];
	}

	public function processRequest() {
	$request = $this->getRequest();
	$user = $request->getUser();

	$file = id(new PhabricatorFileQuery())
	->setViewer($user)
	->withIDs(array($this->id))
	->requireCapabilities(
	array(
	PhabricatorPolicyCapability::CAN_VIEW,
	PhabricatorPolicyCapability::CAN_EDIT,
	))
	->executeOne();
	if (!$file) {
	return new Aphront404Response();
	}

	if (($user->getPHID() != $file->getAuthorPHID()) &&
	(!$user->getIsAdmin())) {
	return new Aphront403Response();
	}

	if ($request->isFormPost()) {
	$file->delete();
	return id(new AphrontRedirectResponse())->setURI('/file/');
	}

	$dialog = new AphrontDialogView();
	$dialog->setUser($user);
	$dialog->setTitle(pht('Really delete file?'));
	$dialog->appendChild(hsprintf(
	'<p>%s</p>',
	pht(
	"Permanently delete '%s'? This action can not be undone.",
	$file->getName())));
	$dialog->addSubmitButton(pht('Delete'));
	$dialog->addCancelButton($file->getInfoURI());

	return id(new AphrontDialogResponse())->setDialog($dialog);
	}
	}