<?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;
/**
* Represents a choice question.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ChoiceQuestion extends Question
{
private $choices;
private $multiselect = false;
private $prompt = ' > ';
private $errorMessage = 'Value "%s" is invalid';
/**
* Constructor.
*
* @param string $question The question to ask to the user
* @param array $choices The list of available choices
* @param mixed $default The default answer to return
*/
public function __construct($question, array $choices, $default = null)
{
if (!$choices) {
throw new \LogicException('Choice question must have at least 1 choice available.');
}
parent::__construct($question, $default);
$this->choices = $choices;
$this->setValidator($this->getDefaultValidator());
$this->setAutocompleterValues($choices);
}
/**
* Returns available choices.
*
* @return array
*/
public function getChoices()
{
return $this->choices;
}
/**
* Sets multiselect option.
*
* When multiselect is set to true, multiple choices can be answered.
*
* @param bool $multiselect
*
* @return $this
*/
public function setMultiselect($multiselect)
{
$this->multiselect = $multiselect;
$this->setValidator($this->getDefaultValidator());
return $this;
}
/**
* Returns whether the choices are multiselect.
*
* @return bool
*/
public function isMultiselect()
{
return $this->multiselect;
}
/**
* Gets the prompt for choices.
*
* @return string
*/
public function getPrompt()
{
return $this->prompt;
}
/**
* Sets the prompt for choices.
*
* @param string $prompt
*
* @return $this
*/
public function setPrompt($prompt)
{
$this->prompt = $prompt;
return $this;
}
/**
* Sets the error message for invalid values.
*
* The error message has a string placeholder (%s) for the invalid value.
*
* @param string $errorMessage
*
* @return $this
*/
public function setErrorMessage($errorMessage)
{
$this->errorMessage = $errorMessage;
$this->setValidator($this->getDefaultValidator());
return $this;
}
/**
* Returns the default answer validator.
*
* @return callable
*/
private function getDefaultValidator()
{
$choices = $this->choices;
$errorMessage = $this->errorMessage;
$multiselect = $this->multiselect;
$isAssoc = $this->isAssoc($choices);
return function ($selected) use ($choices, $errorMessage, $multiselect, $isAssoc) {
// Collapse all spaces.
$selectedChoices = str_replace(' ', '', $selected);
if ($multiselect) {
// Check for a separated comma values
if (!preg_match('/^[^,]+(?:,[^,]+)*$/', $selectedChoices, $matches)) {
throw new InvalidArgumentException(sprintf($errorMessage, $selected));
}
$selectedChoices = explode(',', $selectedChoices);
} else {
$selectedChoices = array($selected);
}
$multiselectChoices = array();
foreach ($selectedChoices as $value) {
$results = array();
foreach ($choices as $key => $choice) {
if ($choice === $value) {
$results[] = $key;
}
}
if (count($results) > 1) {
throw new InvalidArgumentException(sprintf('The provided answer is ambiguous. Value should be one of %s.', implode(' or ', $results)));
}
$result = array_search($value, $choices);
if (!$isAssoc) {
if (false !== $result) {
$result = $choices[$result];
} elseif (isset($choices[$value])) {
$result = $choices[$value];
}
} elseif (false === $result && isset($choices[$value])) {
$result = $value;
}
if (false === $result) {
throw new InvalidArgumentException(sprintf($errorMessage, $value));
}
$multiselectChoices[] = (string) $result;
}
if ($multiselect) {
return $multiselectChoices;
}
return current($multiselectChoices);
};
}
}
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