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ThrowUpCommand.php
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ThrowUpCommand.php
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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Command;
use PhpParser\Node\Arg;
use PhpParser\Node\Expr\New_;
use PhpParser\Node\Expr\Throw_;
use PhpParser\Node\Expr\Variable;
use PhpParser\Node\Name\FullyQualified as FullyQualifiedName;
use PhpParser\Node\Scalar\String_;
use PhpParser\Node\Stmt\Expression;
use PhpParser\PrettyPrinter\Standard as Printer;
use Psy\Exception\ThrowUpException;
use Psy\Input\CodeArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Throw an exception or error out of the Psy Shell.
*/
class ThrowUpCommand extends Command
{
private CodeArgumentParser $parser;
private Printer $printer;
/**
* {@inheritdoc}
*/
public function __construct($name = null)
{
$this->parser = new CodeArgumentParser();
$this->printer = new Printer();
parent::__construct($name);
}
/**
* {@inheritdoc}
*/
protected function configure()
{
$this
->setName('throw-up')
->setDefinition([
new CodeArgument('exception', CodeArgument::OPTIONAL, 'Exception or Error to throw.'),
])
->setDescription('Throw an exception or error out of the Psy Shell.')
->setHelp(
<<<'HELP'
Throws an exception or error out of the current the Psy Shell instance.
By default it throws the most recent exception.
e.g.
<return>>>> throw-up</return>
<return>>>> throw-up $e</return>
<return>>>> throw-up new Exception('WHEEEEEE!')</return>
<return>>>> throw-up "bye!"</return>
HELP
);
}
/**
* {@inheritdoc}
*
* @return int 0 if everything went fine, or an exit code
*
* @throws \InvalidArgumentException if there is no exception to throw
*/
protected function execute(InputInterface $input, OutputInterface $output): int
{
$args = $this->prepareArgs($input->getArgument('exception'));
$throwStmt = new Expression(new Throw_(new New_(new FullyQualifiedName(ThrowUpException::class), $args)));
$throwCode = $this->printer->prettyPrint([$throwStmt]);
$shell = $this->getShell();
$shell->addCode($throwCode, !$shell->hasCode());
return 0;
}
/**
* Parse the supplied command argument.
*
* If no argument was given, this falls back to `$_e`
*
* @throws \InvalidArgumentException if there is no exception to throw
*
* @param string $code
*
* @return Arg[]
*/
private function prepareArgs(?string $code = null): array
{
if (!$code) {
// Default to last exception if nothing else was supplied
return [new Arg(new Variable('_e'))];
}
$nodes = $this->parser->parse($code);
if (\count($nodes) !== 1) {
throw new \InvalidArgumentException('No idea how to throw this');
}
$node = $nodes[0];
$expr = $node->expr;
$args = [new Arg($expr, false, false, $node->getAttributes())];
// Allow throwing via a string, e.g. `throw-up "SUP"`
if ($expr instanceof String_) {
return [new New_(new FullyQualifiedName(\Exception::class), $args)];
}
return $args;
}
}

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ThrowUpCommand.php (3 KB)

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