Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of Psy Shell.

 *

 * (c) 2012-2022 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;

use PhpParser\Parser;

use Psy\Context;

use Psy\ContextAware;

use Psy\Input\CodeArgument;

use Psy\ParserFactory;

use Psy\VarDumper\Presenter;

use Psy\VarDumper\PresenterAware;

use Symfony\Component\Console\Input\InputInterface;

use Symfony\Component\Console\Input\InputOption;

use Symfony\Component\Console\Output\OutputInterface;

use Symfony\Component\VarDumper\Caster\Caster;

/**

 * Parse PHP code and show the abstract syntax tree.

 */

class ParseCommand extends Command implements ContextAware, PresenterAware

{

    /**

     * Context instance (for ContextAware interface).

     *

     * @var Context

     */

    protected $context;

    private $presenter;

    private $parserFactory;

    private $parsers;

    /**

     * {@inheritdoc}

     */

    public function __construct($name = null)

    {

        $this->parserFactory = new ParserFactory();

        $this->parsers = [];

        parent::__construct($name);

    }

    /**

     * ContextAware interface.

     *

     * @param Context $context

     */

    public function setContext(Context $context)

    {

        $this->context = $context;

    }

    /**

     * PresenterAware interface.

     *

     * @param Presenter $presenter

     */

    public function setPresenter(Presenter $presenter)

    {

        $this->presenter = clone $presenter;

        $this->presenter->addCasters([

            Node::class => function (Node $node, array $a) {

                $a = [

                    Caster::PREFIX_VIRTUAL.'type'       => $node->getType(),

                    Caster::PREFIX_VIRTUAL.'attributes' => $node->getAttributes(),

                ];

                foreach ($node->getSubNodeNames() as $name) {

                    $a[Caster::PREFIX_VIRTUAL.$name] = $node->$name;

                }

                return $a;

            },

        ]);

    }

    /**

     * {@inheritdoc}

     */

    protected function configure()

    {

        $kindMsg = 'One of PhpParser\\ParserFactory constants: '

            .\implode(', ', ParserFactory::getPossibleKinds())

            ." (default is based on current interpreter's version).";

        $this

            ->setName('parse')

            ->setDefinition([

            new CodeArgument('code', CodeArgument::REQUIRED, 'PHP code to parse.'),

            new InputOption('depth', '', InputOption::VALUE_REQUIRED, 'Depth to parse.', 10),

            new InputOption('kind', '', InputOption::VALUE_REQUIRED, $kindMsg, $this->parserFactory->getDefaultKind()),

        ])

            ->setDescription('Parse PHP code and show the abstract syntax tree.')

            ->setHelp(

                <<<'HELP'

Parse PHP code and show the abstract syntax tree.

This command is used in the development of PsySH. Given a string of PHP code,

it pretty-prints the PHP Parser parse tree.

See https://github.com/nikic/PHP-Parser

It prolly won't be super useful for most of you, but it's here if you want to play.

HELP

            );

    }

    /**

     * {@inheritdoc}

     */

    protected function execute(InputInterface $input, OutputInterface $output)

    {

        $code = $input->getArgument('code');

        if (\strpos($code, '<?') === false) {

            $code = '<?php '.$code;

        }

        $parserKind = $input->getOption('kind');

        $depth = $input->getOption('depth');

        $nodes = $this->parse($this->getParser($parserKind), $code);

        $output->page($this->presenter->present($nodes, $depth));

        $this->context->setReturnValue($nodes);

        return 0;

    }

    /**

     * Lex and parse a string of code into statements.

     *

     * @param Parser $parser

     * @param string $code

     *

     * @return array Statements

     */

    private function parse(Parser $parser, string $code): array

    {

        try {

            return $parser->parse($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 $parser->parse($code.';');

        }

    }

    /**

     * Get (or create) the Parser instance.

     *

     * @param string|null $kind One of Psy\ParserFactory constants (only for PHP parser 2.0 and above)

     *

     * @return Parser

     */

    private function getParser(string $kind = null): Parser

    {

        if (!\array_key_exists($kind, $this->parsers)) {

            $this->parsers[$kind] = $this->parserFactory->createParser($kind);

        }

        return $this->parsers[$kind];

    }

}