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<?php
/* Icinga DB Web | (c) 2021 Icinga GmbH | GPLv2 */
namespace Icinga\Module\Icingadb\Forms\Command;
use ArrayIterator;
use Exception;
use Generator;
use Icinga\Application\Logger;
use Icinga\Module\Icingadb\Command\IcingaCommand;
use Icinga\Module\Icingadb\Command\Transport\CommandTransport;
use Icinga\Module\Icingadb\Common\Auth;
use Icinga\Web\Notification;
use Icinga\Web\Session;
use ipl\Html\Form;
use ipl\Orm\Model;
use ipl\Web\Common\CsrfCounterMeasure;
use Traversable;
abstract class CommandForm extends Form
{
use Auth;
use CsrfCounterMeasure;
protected $defaultAttributes = ['class' => 'icinga-form icinga-controls'];
/** @var mixed */
protected $objects;
/** @var bool */
protected $isApiTarget = false;
/**
* Whether an error occurred while sending the command
*
* Prevents the success message from being rendered simultaneously
*
* @var bool
*/
protected $errorOccurred = false;
/**
* Set the objects to issue the command for
*
* @param mixed $objects A traversable that is also countable
*
* @return $this
*/
public function setObjects($objects): self
{
$this->objects = $objects;
return $this;
}
/**
* Get the objects to issue the command for
*
* @return mixed
*/
public function getObjects()
{
return $this->objects;
}
/**
* Set whether this form is an API target
*
* @param bool $state
*
* @return $this
*/
public function setIsApiTarget(bool $state = true): self
{
$this->isApiTarget = $state;
return $this;
}
/**
* Get whether this form is an API target
*
* @return bool
*/
public function isApiTarget(): bool
{
return $this->isApiTarget;
}
/**
* Create and add form elements representing the command's options
*
* @return void
*/
abstract protected function assembleElements();
/**
* Create and add a submit button to the form
*
* @return void
*/
abstract protected function assembleSubmitButton();
/**
* Get the commands to issue for the given objects
*
* @param Traversable<Model> $objects
*
* @return Traversable<IcingaCommand>
*/
abstract protected function getCommands(Traversable $objects): Traversable;
protected function assemble()
{
$this->assembleElements();
if (! $this->isApiTarget()) {
$this->assembleSubmitButton();
$this->addElement($this->createCsrfCounterMeasure(Session::getSession()->getId()));
}
}
protected function onSuccess()
{
$errors = [];
$objects = $this->getObjects();
foreach ($this->getCommands(is_array($objects) ? new ArrayIterator($objects) : $objects) as $command) {
try {
$this->sendCommand($command);
} catch (Exception $e) {
Logger::error($e->getMessage());
$errors[] = $e->getMessage();
}
}
if (! empty($errors)) {
if (count($errors) > 1) {
Notification::warning(
t('Some commands were not transmitted. Please check the log. The first error follows.')
);
}
$this->errorOccurred = true;
Notification::error($errors[0]);
}
}
/**
* Transmit the given command
*
* @param IcingaCommand $command
*
* @return void
*/
protected function sendCommand(IcingaCommand $command)
{
(new CommandTransport())->send($command);
}
/**
* Yield the $objects the currently logged in user has the permission $permission for
*
* @param string $permission
* @param Traversable $objects
*
* @return Generator
*/
protected function filterGrantedOn(string $permission, Traversable $objects): Generator
{
foreach ($objects as $object) {
if ($this->isGrantedOn($permission, $object)) {
yield $object;
}
}
}
}
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