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InputArgument.php
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InputArgument.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Input;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Completion\CompletionInput;
use Symfony\Component\Console\Completion\CompletionSuggestions;
use Symfony\Component\Console\Completion\Suggestion;
use Symfony\Component\Console\Exception\InvalidArgumentException;
use Symfony\Component\Console\Exception\LogicException;
/**
* Represents a command line argument.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class InputArgument
{
/**
* Providing an argument is required (e.g. just 'app:foo' is not allowed).
*/
public const REQUIRED = 1;
/**
* Providing an argument is optional (e.g. 'app:foo' and 'app:foo bar' are both allowed). This is the default behavior of arguments.
*/
public const OPTIONAL = 2;
/**
* The argument accepts multiple values and turn them into an array (e.g. 'app:foo bar baz' will result in value ['bar', 'baz']).
*/
public const IS_ARRAY = 4;
private int $mode;
private string|int|bool|array|float|null $default;
/**
* @param string $name The argument name
* @param int-mask-of<InputArgument::*>|null $mode The argument mode: a bit mask of self::REQUIRED, self::OPTIONAL and self::IS_ARRAY
* @param string $description A description text
* @param string|bool|int|float|array|null $default The default value (for self::OPTIONAL mode only)
* @param array|\Closure(CompletionInput,CompletionSuggestions):list<string|Suggestion> $suggestedValues The values used for input completion
*
* @throws InvalidArgumentException When argument mode is not valid
*/
public function __construct(
private string $name,
?int $mode = null,
private string $description = '',
string|bool|int|float|array|null $default = null,
private \Closure|array $suggestedValues = [],
) {
if (null === $mode) {
$mode = self::OPTIONAL;
} elseif ($mode >= (self::IS_ARRAY << 1) || $mode < 1) {
throw new InvalidArgumentException(\sprintf('Argument mode "%s" is not valid.', $mode));
}
$this->mode = $mode;
$this->setDefault($default);
}
/**
* Returns the argument name.
*/
public function getName(): string
{
return $this->name;
}
/**
* Returns true if the argument is required.
*
* @return bool true if parameter mode is self::REQUIRED, false otherwise
*/
public function isRequired(): bool
{
return self::REQUIRED === (self::REQUIRED & $this->mode);
}
/**
* Returns true if the argument can take multiple values.
*
* @return bool true if mode is self::IS_ARRAY, false otherwise
*/
public function isArray(): bool
{
return self::IS_ARRAY === (self::IS_ARRAY & $this->mode);
}
/**
* Sets the default value.
*/
public function setDefault(string|bool|int|float|array|null $default): void
{
if ($this->isRequired() && null !== $default) {
throw new LogicException('Cannot set a default value except for InputArgument::OPTIONAL mode.');
}
if ($this->isArray()) {
if (null === $default) {
$default = [];
} elseif (!\is_array($default)) {
throw new LogicException('A default value for an array argument must be an array.');
}
}
$this->default = $default;
}
/**
* Returns the default value.
*/
public function getDefault(): string|bool|int|float|array|null
{
return $this->default;
}
/**
* Returns true if the argument has values for input completion.
*/
public function hasCompletion(): bool
{
return [] !== $this->suggestedValues;
}
/**
* Supplies suggestions when command resolves possible completion options for input.
*
* @see Command::complete()
*/
public function complete(CompletionInput $input, CompletionSuggestions $suggestions): void
{
$values = $this->suggestedValues;
if ($values instanceof \Closure && !\is_array($values = $values($input))) {
throw new LogicException(\sprintf('Closure for argument "%s" must return an array. Got "%s".', $this->name, get_debug_type($values)));
}
if ($values) {
$suggestions->suggestValues($values);
}
}
/**
* Returns the description text.
*/
public function getDescription(): string
{
return $this->description;
}
}

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