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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2018 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\NodeTraverser;
use PhpParser\PrettyPrinter\Standard as Printer;
use Psy\Input\CodeArgument;
use Psy\ParserFactory;
use Psy\Readline\Readline;
use Psy\Sudo\SudoVisitor;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Evaluate PHP code, bypassing visibility restrictions.
*/
class SudoCommand extends Command
{
private $readline;
private $parser;
private $traverser;
private $printer;
/**
* {@inheritdoc}
*/
public function __construct($name = null)
{
$parserFactory = new ParserFactory();
$this->parser = $parserFactory->createParser();
$this->traverser = new NodeTraverser();
$this->traverser->addVisitor(new SudoVisitor());
$this->printer = new Printer();
parent::__construct($name);
}
/**
* Set the Shell's Readline service.
*
* @param Readline $readline
*/
public function setReadline(Readline $readline)
{
$this->readline = $readline;
}
/**
* {@inheritdoc}
*/
protected function configure()
{
$this
->setName('sudo')
->setDefinition([
new CodeArgument('code', CodeArgument::REQUIRED, 'Code to execute.'),
])
->setDescription('Evaluate PHP code, bypassing visibility restrictions.')
->setHelp(
<<<'HELP'
Evaluate PHP code, bypassing visibility restrictions.
e.g.
<return>>>> $sekret->whisper("hi")</return>
<return>PHP error: Call to private method Sekret::whisper() from context '' on line 1</return>
<return>>>> sudo $sekret->whisper("hi")</return>
<return>=> "hi"</return>
<return>>>> $sekret->word</return>
<return>PHP error: Cannot access private property Sekret::$word on line 1</return>
<return>>>> sudo $sekret->word</return>
<return>=> "hi"</return>
<return>>>> $sekret->word = "please"</return>
<return>PHP error: Cannot access private property Sekret::$word on line 1</return>
<return>>>> sudo $sekret->word = "please"</return>
<return>=> "please"</return>
HELP
);
}
/**
* {@inheritdoc}
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
$code = $input->getArgument('code');
// special case for !!
if ($code === '!!') {
$history = $this->readline->listHistory();
if (\count($history) < 2) {
throw new \InvalidArgumentException('No previous command to replay');
}
$code = $history[\count($history) - 2];
}
if (\strpos('<?', $code) === false) {
$code = '<?php ' . $code;
}
$nodes = $this->traverser->traverse($this->parse($code));
$sudoCode = $this->printer->prettyPrint($nodes);
$shell = $this->getApplication();
$shell->addCode($sudoCode, !$shell->hasCode());
return 0;
}
/**
* Lex and parse a string of code into statements.
*
* @param string $code
*
* @return array Statements
*/
private function parse($code)
{
try {
return $this->parser->parse($code);
} catch (\PhpParser\Error $e) {
if (\strpos($e->getMessage(), 'unexpected EOF') === false) {
throw $e;
}
// If we got an unexpected EOF, let's try it again with a semicolon.
return $this->parser->parse($code . ';');
}
}
}