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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2026 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Input;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\StringInput;
/**
* A StringInput subclass specialized for code arguments.
*/
class ShellInput extends StringInput
{
public const REGEX_STRING = '([^\s]+?)(?:\s|(?<!\\\\)"|(?<!\\\\)\'|$)';
private bool $hasCodeArgument = false;
/**
* Unlike the parent implementation's tokens, this contains an array of
* token/rest pairs, so that code arguments can be handled while parsing.
*/
private array $tokenPairs;
private array $parsed = [];
/**
* Constructor.
*
* @param string $input An array of parameters from the CLI (in the argv format)
*/
public function __construct(string $input)
{
parent::__construct($input);
$this->tokenPairs = $this->tokenize($input);
}
/**
* {@inheritdoc}
*
* @throws \InvalidArgumentException if $definition has CodeArgument before the final argument position
*/
public function bind(InputDefinition $definition): void
{
$hasCodeArgument = false;
if ($definition->getArgumentCount() > 0) {
$args = $definition->getArguments();
$lastArg = \array_pop($args);
foreach ($args as $arg) {
if ($arg instanceof CodeArgument) {
$msg = \sprintf('Unexpected CodeArgument before the final position: %s', $arg->getName());
throw new \InvalidArgumentException($msg);
}
}
if ($lastArg instanceof CodeArgument) {
$hasCodeArgument = true;
}
}
$this->hasCodeArgument = $hasCodeArgument;
parent::bind($definition);
}
/**
* Tokenizes a string.
*
* The version of this on StringInput is good, but doesn't handle code
* arguments if they're at all complicated. This does :)
*
* @param string $input The input to tokenize
*
* @return array An array of token/rest pairs
*
* @throws \InvalidArgumentException When unable to parse input (should never happen)
*/
private function tokenize(string $input): array
{
$tokens = [];
$length = \strlen($input);
$cursor = 0;
while ($cursor < $length) {
if (\preg_match('/\s+/A', $input, $match, 0, $cursor)) {
} elseif (\preg_match('/([^="\'\s]+?)(=?)('.StringInput::REGEX_QUOTED_STRING.'+)/A', $input, $match, 0, $cursor)) {
$tokens[] = [
$match[1].$match[2].\stripcslashes(\str_replace(['"\'', '\'"', '\'\'', '""'], '', \substr($match[3], 1, \strlen($match[3]) - 2))),
\stripcslashes(\substr($input, $cursor)),
];
} elseif (\preg_match('/'.StringInput::REGEX_QUOTED_STRING.'/A', $input, $match, 0, $cursor)) {
$tokens[] = [
\stripcslashes(\substr($match[0], 1, \strlen($match[0]) - 2)),
\stripcslashes(\substr($input, $cursor)),
];
} elseif (\preg_match('/'.self::REGEX_STRING.'/A', $input, $match, 0, $cursor)) {
$tokens[] = [
\stripcslashes($match[1]),
\stripcslashes(\substr($input, $cursor)),
];
} else {
// should never happen
// @codeCoverageIgnoreStart
throw new \InvalidArgumentException(\sprintf('Unable to parse input near "... %s ..."', \substr($input, $cursor, 10)));
// @codeCoverageIgnoreEnd
}
$cursor += \strlen($match[0]);
}
return $tokens;
}
/**
* Same as parent, but with some bonus handling for code arguments.
*/
protected function parse(): void
{
$parseOptions = true;
$this->parsed = $this->tokenPairs;
while (null !== $tokenPair = \array_shift($this->parsed)) {
// token is what you'd expect. rest is the remainder of the input
// string, including token, and will be used if this is a code arg.
list($token, $rest) = $tokenPair;
if ($parseOptions && '' === $token) {
$this->parseShellArgument($token, $rest);
} elseif ($parseOptions && '--' === $token) {
$parseOptions = false;
} elseif ($parseOptions && 0 === \strpos($token, '--')) {
$this->parseLongOption($token);
} elseif ($parseOptions && '-' === $token[0] && '-' !== $token) {
$this->parseShortOption($token);
} else {
$this->parseShellArgument($token, $rest);
}
}
}
/**
* Parses an argument, with bonus handling for code arguments.
*
* @param string $token The current token
* @param string $rest The remaining unparsed input, including the current token
*
* @throws \RuntimeException When too many arguments are given
*/
private function parseShellArgument(string $token, string $rest)
{
$c = \count($this->arguments);
// if input is expecting another argument, add it
if ($this->definition->hasArgument($c)) {
$arg = $this->definition->getArgument($c);
if ($arg instanceof CodeArgument) {
// When we find a code argument, we're done parsing. Add the
// remaining input to the current argument and call it a day.
$this->parsed = [];
$this->arguments[$arg->getName()] = $rest;
} else {
$this->arguments[$arg->getName()] = $arg->isArray() ? [$token] : $token;
}
return;
}
// (copypasta)
//
// @codeCoverageIgnoreStart
// if last argument isArray(), append token to last argument
if ($this->definition->hasArgument($c - 1) && $this->definition->getArgument($c - 1)->isArray()) {
$arg = $this->definition->getArgument($c - 1);
$this->arguments[$arg->getName()][] = $token;
return;
}
// unexpected argument
$all = $this->definition->getArguments();
if (\count($all)) {
throw new \RuntimeException(\sprintf('Too many arguments, expected arguments "%s".', \implode('" "', \array_keys($all))));
}
throw new \RuntimeException(\sprintf('No arguments expected, got "%s".', $token));
// @codeCoverageIgnoreEnd
}
// Everything below this is copypasta from ArgvInput private methods
// @codeCoverageIgnoreStart
/**
* Parses a short option.
*
* @param string $token The current token
*/
private function parseShortOption(string $token)
{
$name = \substr($token, 1);
if (\strlen($name) > 1) {
if ($this->definition->hasShortcut($name[0]) && $this->definition->getOptionForShortcut($name[0])->acceptValue()) {
// an option with a value (with no space)
$this->addShortOption($name[0], \substr($name, 1));
} else {
$this->parseShortOptionSet($name);
}
} else {
$this->addShortOption($name, null);
}
}
/**
* Parses a short option set.
*
* @param string $name The current token
*
* @throws \RuntimeException When option given doesn't exist
*/
private function parseShortOptionSet(string $name)
{
$len = \strlen($name);
for ($i = 0; $i < $len; $i++) {
if (!$this->definition->hasShortcut($name[$i])) {
throw new \RuntimeException(\sprintf('The "-%s" option does not exist.', $name[$i]));
}
$option = $this->definition->getOptionForShortcut($name[$i]);
if ($option->acceptValue()) {
$this->addLongOption($option->getName(), $i === $len - 1 ? null : \substr($name, $i + 1));
break;
} else {
$this->addLongOption($option->getName(), null);
}
}
}
/**
* Parses a long option.
*
* @param string $token The current token
*/
private function parseLongOption(string $token)
{
$name = \substr($token, 2);
if (false !== $pos = \strpos($name, '=')) {
if (($value = \substr($name, $pos + 1)) === '') {
\array_unshift($this->parsed, [$value, null]);
}
$this->addLongOption(\substr($name, 0, $pos), $value);
} else {
$this->addLongOption($name, null);
}
}
/**
* Adds a short option value.
*
* @param string $shortcut The short option key
* @param mixed $value The value for the option
*
* @throws \RuntimeException When option given doesn't exist
*/
private function addShortOption(string $shortcut, $value)
{
if (!$this->definition->hasShortcut($shortcut)) {
throw new \RuntimeException(\sprintf('The "-%s" option does not exist.', $shortcut));
}
$this->addLongOption($this->definition->getOptionForShortcut($shortcut)->getName(), $value);
}
/**
* Adds a long option value.
*
* @param string $name The long option key
* @param mixed $value The value for the option
*
* @throws \RuntimeException When option given doesn't exist
*/
private function addLongOption(string $name, $value)
{
if (!$this->definition->hasOption($name)) {
throw new \RuntimeException(\sprintf('The "--%s" option does not exist.', $name));
}
$option = $this->definition->getOption($name);
if (null !== $value && !$option->acceptValue()) {
throw new \RuntimeException(\sprintf('The "--%s" option does not accept a value.', $name));
}
if (\in_array($value, ['', null], true) && $option->acceptValue() && \count($this->parsed)) {
// if option accepts an optional or mandatory argument
// let's see if there is one provided
$next = \array_shift($this->parsed);
$nextToken = $next[0];
if ((isset($nextToken[0]) && '-' !== $nextToken[0]) || \in_array($nextToken, ['', null], true)) {
$value = $nextToken;
} else {
\array_unshift($this->parsed, $next);
}
}
if ($value === null) {
if ($option->isValueRequired()) {
throw new \RuntimeException(\sprintf('The "--%s" option requires a value.', $name));
}
if (!$option->isArray() && !$option->isValueOptional()) {
$value = true;
}
}
if ($option->isArray()) {
$this->options[$name][] = $value;
} else {
$this->options[$name] = $value;
}
}
// @codeCoverageIgnoreEnd
}