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<?php |
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declare(strict_types=1); |
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/* |
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* Copyright (c) 2022 Ne-Lexa <[email protected]> |
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* |
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* For the full copyright and license information, please view |
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* the LICENSE file that was distributed with this source code. |
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* |
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* @see https://github.com/Ne-Lexa/roach-php-bundle |
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*/ |
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namespace Nelexa\RoachPhpBundle\Command; |
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use RoachPHP\Roach; |
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use RoachPHP\Spider\Configuration\Overrides; |
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use Symfony\Component\Console\Command\Command; |
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use Symfony\Component\Console\Input\InputArgument; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Input\InputOption; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Style\OutputStyle; |
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use Symfony\Component\Console\Style\SymfonyStyle; |
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use Symfony\Component\DependencyInjection\ServiceLocator; |
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final class RunSpiderCommand extends Command |
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{ |
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protected static $defaultName = 'roach:run'; |
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protected static $defaultDescription = 'Run the provided spider'; |
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/** @var array<class-string<\RoachPHP\Spider\SpiderInterface>, array<string>> */ |
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private array $spiderNames; |
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public function __construct(private ServiceLocator $serviceLocator) |
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{ |
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/** @var array<class-string<\RoachPHP\Spider\SpiderInterface>> $providedServices */ |
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$providedServices = $this->serviceLocator->getProvidedServices(); |
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$this->spiderNames = $this->buildSpiderNameAliases($providedServices); |
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parent::__construct(); |
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} |
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protected function configure(): void |
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{ |
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$spiderArgDescription = "Spider class name\nSupport spiders:\n"; |
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foreach ($this->spiderNames as $className => $aliases) { |
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$spiderArgDescription .= '[*] <comment>' . $className . '</comment> or aliases <info>' |
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. implode('</info>, <info>', $aliases) |
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. '</info>' . \PHP_EOL; |
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} |
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$this |
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->addArgument('spider', InputArgument::OPTIONAL, rtrim($spiderArgDescription)) |
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->addOption('delay', 't', InputOption::VALUE_OPTIONAL, 'The delay (in seconds) between requests.') |
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->addOption('concurrency', 'p', InputOption::VALUE_OPTIONAL, 'The number of concurrent requests.') |
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; |
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} |
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/** |
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* @param array<class-string<\RoachPHP\Spider\SpiderInterface>> $services |
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* |
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* @return array<class-string<\RoachPHP\Spider\SpiderInterface>, array<string>> |
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*/ |
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private function buildSpiderNameAliases(array $services): array |
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{ |
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$aliasServices = []; |
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foreach ($services as $className) { |
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$aliases = []; |
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if (($lastPosDelim = strrpos($className, '\\')) !== false) { |
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$shortClassName = substr($className, $lastPosDelim + 1); |
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$aliases[] = $shortClassName; |
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} else { |
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$shortClassName = $className; |
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} |
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$snakeCaseClass = strtolower(ltrim(preg_replace('/[A-Z]([A-Z](?![a-z]))*/', '_$0', $shortClassName), '_')); |
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$aliases[] = $snakeCaseClass; |
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if (preg_match('~^(.*?)_spider$~', $snakeCaseClass, $matches)) { |
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$aliases[] = $matches[1]; |
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} |
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$aliasServices[$className] = $aliases; |
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} |
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return $aliasServices; |
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} |
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protected function interact(InputInterface $input, OutputInterface $output): void |
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{ |
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$spiderName = $input->getArgument('spider'); |
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if ($spiderName === null) { |
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$spiderName = $this->selectSpiderClassName(new SymfonyStyle($input, $output)); |
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$input->setArgument('spider', $spiderName); |
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} |
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} |
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private function selectSpiderClassName(OutputStyle $io): string |
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{ |
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return (string) $io->choice('Choose a spider class', array_values($this->serviceLocator->getProvidedServices())); |
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} |
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protected function execute(InputInterface $input, OutputInterface $output): int |
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{ |
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$spiderName = $input->getArgument('spider'); |
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$spiderClassName = $this->findSpiderClass($spiderName); |
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if ($spiderClassName === null) { |
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\assert($spiderName !== null); |
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$io = new SymfonyStyle($input, $output); |
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$io->error('Unknown spider ' . $spiderName); |
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return self::FAILURE; |
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} |
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$delay = $input->getOption('delay'); |
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if ($delay !== null) { |
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$delay = max(0, (int) $delay); |
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} |
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$concurrency = $input->getOption('concurrency'); |
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if ($concurrency !== null) { |
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$concurrency = max(1, (int) $concurrency); |
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} |
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$overrides = new Overrides( |
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concurrency: $concurrency, |
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requestDelay: $delay, |
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); |
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Roach::startSpider($spiderClassName, $overrides); |
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return self::SUCCESS; |
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} |
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/** |
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* @return class-string<\RoachPHP\Spider\SpiderInterface>|null |
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*/ |
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private function findSpiderClass(?string $spiderName): ?string |
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{ |
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if ($spiderName !== null) { |
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foreach ($this->spiderNames as $className => $aliases) { |
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if ($className === $spiderName || \in_array($spiderName, $aliases, true)) { |
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return $className; |
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} |
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} |
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} |
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return null; |
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} |
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} |
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Ne-Lexa /
roach-php-bundle
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