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<?php |
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namespace TheAentMachine\Helper; |
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use Symfony\Component\Console\Exception\InvalidArgumentException; |
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use Symfony\Component\Console\Helper\QuestionHelper; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Question\ChoiceQuestion as SymfonyChoiceQuestion; |
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/** |
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* A helper class to easily create choice questions. |
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*/ |
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class ChoiceQuestion extends BaseQuestion |
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{ |
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/** @var string[] */ |
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private $choices; |
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/** @var bool */ |
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private $multiselect = false; |
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public function __construct(QuestionHelper $helper, InputInterface $input, OutputInterface $output, string $question, array $choices, bool $printAnswer = true) |
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{ |
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parent::__construct($helper, $input, $output, $question, $printAnswer); |
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$this->choices = $choices; |
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} |
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public function setDefault(string $default): self |
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{ |
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$this->default = $default; |
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return $this; |
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} |
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public function setHelpText(string $helpText): self |
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{ |
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$this->helpText = $helpText; |
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return $this; |
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} |
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public function ask(): string |
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{ |
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$question = $this->initQuestion(false); |
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do { |
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$answer = $this->helper->ask($this->input, $this->output, $question); |
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} while ($this->helpText !== null && $answer === '?'); |
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return $answer; |
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} |
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/** @return string[] */ |
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public function askWithMultipleChoices(): array |
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{ |
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$question = $this->initQuestion(true); |
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do { |
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$answer = $this->helper->ask($this->input, $this->output, $question); |
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} while ($this->helpText !== null && $answer === '?'); |
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return $answer; |
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} |
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private function initQuestion(bool $multiselect): SymfonyChoiceQuestion |
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{ |
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$text = $this->question; |
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if ($this->helpText) { |
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$text .= ' (? for help)'; |
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} |
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if ($this->default) { |
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$defaultText = (\is_array($this->default) ? implode(', ', $this->default) : $this->default); |
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$text .= ' [' . $defaultText . ']'; |
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} |
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$text .= ': '; |
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$this->question = $text; |
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$question = new SymfonyChoiceQuestion($this->question, $this->choices, $this->default); |
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$this->multiselect = $multiselect; |
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$question->setMultiselect($this->multiselect); |
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$question->setValidator($this->getDefaultValidator()); |
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return $question; |
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} |
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/** Greatly inspired from the default Symfony's ChoiceQuestion validator*/ |
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private function getDefaultValidator(): callable |
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{ |
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$choices = $this->choices; |
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$errorMessage = 'Value "%s" is invalid'; |
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$multiselect = $this->multiselect; |
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$isAssoc = (bool)count(array_filter(array_keys($this->choices), '\is_string')); |
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return function ($selected) use ($choices, $errorMessage, $multiselect, $isAssoc) { |
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// Collapse all spaces. |
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$selectedChoices = str_replace(' ', '', $selected); |
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if ($this->helpText !== null && $selectedChoices === '?') { |
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$this->output->writeln($this->helpText ?: ''); |
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return '?'; |
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} |
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if ($multiselect) { |
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// Check for a separated comma values |
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if (!preg_match('/^[^,]+(?:,[^,]+)*$/', $selectedChoices, $matches)) { |
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throw new InvalidArgumentException(sprintf($errorMessage, $selected)); |
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} |
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$selectedChoices = explode(',', $selectedChoices); |
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} else { |
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$selectedChoices = array($selected); |
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} |
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$multiselectChoices = array(); |
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foreach ($selectedChoices as $value) { |
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$results = array(); |
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foreach ($choices as $key => $choice) { |
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if ($choice === $value) { |
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$results[] = $key; |
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} |
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} |
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if (count($results) > 1) { |
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throw new InvalidArgumentException(sprintf('The provided answer is ambiguous. Value should be one of %s.', implode(' or ', $results))); |
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} |
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$result = array_search($value, $choices, true); |
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if (!$isAssoc) { |
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if (false !== $result) { |
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$result = $choices[$result]; |
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} elseif (isset($choices[$value])) { |
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$result = $choices[$value]; |
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} |
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} elseif (false === $result && isset($choices[$value])) { |
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$result = $value; |
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} |
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if (false === $result) { |
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throw new InvalidArgumentException(sprintf($errorMessage, $value)); |
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} |
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$multiselectChoices[] = (string)$result; |
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} |
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if ($multiselect) { |
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if ($this->printAnswer) { |
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$this->output->writeln('<info>You selected: ' . \implode(", ", $multiselectChoices) . '</info>'); |
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$this->spacer(); |
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} |
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return $multiselectChoices; |
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} |
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$answer = current($multiselectChoices); |
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if ($this->printAnswer) { |
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$this->output->writeln("<info>You selected: $answer</info>"); |
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$this->spacer(); |
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} |
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return $answer; |
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}; |
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} |
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} |
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