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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\Question;
use Symfony\Component\Console\Exception\InvalidArgumentException;
use Symfony\Component\Console\Exception\LogicException;
/**
* Represents a Question.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Question
{
private $question;
private $attempts;
private $hidden = false;
private $hiddenFallback = true;
private $autocompleterCallback;
private $validator;
private $default;
private $normalizer;
private $trimmable = true;
private $multiline = false;
/**
* @param string $question The question to ask to the user
* @param string|bool|int|float|null $default The default answer to return if the user enters nothing
*/
public function __construct(string $question, $default = null)
{
$this->question = $question;
$this->default = $default;
}
/**
* Returns the question.
*
* @return string
*/
public function getQuestion()
{
return $this->question;
}
/**
* Returns the default answer.
*
* @return string|bool|int|float|null
*/
public function getDefault()
{
return $this->default;
}
/**
* Returns whether the user response accepts newline characters.
*/
public function isMultiline(): bool
{
return $this->multiline;
}
/**
* Sets whether the user response should accept newline characters.
*
* @return $this
*/
public function setMultiline(bool $multiline): self
{
$this->multiline = $multiline;
return $this;
}
/**
* Returns whether the user response must be hidden.
*
* @return bool
*/
public function isHidden()
{
return $this->hidden;
}
/**
* Sets whether the user response must be hidden or not.
*
* @return $this
*
* @throws LogicException In case the autocompleter is also used
*/
public function setHidden(bool $hidden)
{
if ($this->autocompleterCallback) {
throw new LogicException('A hidden question cannot use the autocompleter.');
}
$this->hidden = $hidden;
return $this;
}
/**
* In case the response cannot be hidden, whether to fallback on non-hidden question or not.
*
* @return bool
*/
public function isHiddenFallback()
{
return $this->hiddenFallback;
}
/**
* Sets whether to fallback on non-hidden question if the response cannot be hidden.
*
* @return $this
*/
public function setHiddenFallback(bool $fallback)
{
$this->hiddenFallback = $fallback;
return $this;
}
/**
* Gets values for the autocompleter.
*
* @return iterable|null
*/
public function getAutocompleterValues()
{
$callback = $this->getAutocompleterCallback();
return $callback ? $callback('') : null;
}
/**
* Sets values for the autocompleter.
*
* @return $this
*
* @throws LogicException
*/
public function setAutocompleterValues(?iterable $values)
{
if (\is_array($values)) {
$values = $this->isAssoc($values) ? array_merge(array_keys($values), array_values($values)) : array_values($values);
$callback = static function () use ($values) {
return $values;
};
} elseif ($values instanceof \Traversable) {
$valueCache = null;
$callback = static function () use ($values, &$valueCache) {
return $valueCache ?? $valueCache = iterator_to_array($values, false);
};
} else {
$callback = null;
}
return $this->setAutocompleterCallback($callback);
}
/**
* Gets the callback function used for the autocompleter.
*/
public function getAutocompleterCallback(): ?callable
{
return $this->autocompleterCallback;
}
/**
* Sets the callback function used for the autocompleter.
*
* The callback is passed the user input as argument and should return an iterable of corresponding suggestions.
*
* @return $this
*/
public function setAutocompleterCallback(?callable $callback = null): self
{
if ($this->hidden && null !== $callback) {
throw new LogicException('A hidden question cannot use the autocompleter.');
}
$this->autocompleterCallback = $callback;
return $this;
}
/**
* Sets a validator for the question.
*
* @return $this
*/
public function setValidator(?callable $validator = null)
{
$this->validator = $validator;
return $this;
}
/**
* Gets the validator for the question.
*
* @return callable|null
*/
public function getValidator()
{
return $this->validator;
}
/**
* Sets the maximum number of attempts.
*
* Null means an unlimited number of attempts.
*
* @return $this
*
* @throws InvalidArgumentException in case the number of attempts is invalid
*/
public function setMaxAttempts(?int $attempts)
{
if (null !== $attempts && $attempts < 1) {
throw new InvalidArgumentException('Maximum number of attempts must be a positive value.');
}
$this->attempts = $attempts;
return $this;
}
/**
* Gets the maximum number of attempts.
*
* Null means an unlimited number of attempts.
*
* @return int|null
*/
public function getMaxAttempts()
{
return $this->attempts;
}
/**
* Sets a normalizer for the response.
*
* The normalizer can be a callable (a string), a closure or a class implementing __invoke.
*
* @return $this
*/
public function setNormalizer(callable $normalizer)
{
$this->normalizer = $normalizer;
return $this;
}
/**
* Gets the normalizer for the response.
*
* The normalizer can ba a callable (a string), a closure or a class implementing __invoke.
*
* @return callable|null
*/
public function getNormalizer()
{
return $this->normalizer;
}
protected function isAssoc(array $array)
{
return (bool) \count(array_filter(array_keys($array), 'is_string'));
}
public function isTrimmable(): bool
{
return $this->trimmable;
}
/**
* @return $this
*/
public function setTrimmable(bool $trimmable): self
{
$this->trimmable = $trimmable;
return $this;
}
}
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