class BaseRequirementsFulfilledValidator

Validates that base requirements do not have any errors.

Base requirements are the sorts of things that must be in a good state for Package Manager to be usable. For example, Composer must be available and usable; certain paths of the file system must be writable; the current site cannot be part of a multisite, and so on.

This validator simply stops event propagation if any of the validators before it have added error results. Validators that check base requirements should run before this validator (they can use \Drupal\package_manager\Validator\BaseRequirementValidatorTrait to make this easier). To ensure that all base requirement errors are shown to the user, no base requirement validator should stop event propagation itself.

Base requirement validators should not depend on each other or assume that Composer is usable in the current environment.

Hierarchy

Expanded class hierarchy of BaseRequirementsFulfilledValidator

See also

\Drupal\package_manager\Validator\BaseRequirementValidatorTrait

1 file declares its use of BaseRequirementsFulfilledValidator
BaseRequirementsFulfilledValidatorTest.php in core/modules/package_manager/tests/src/Kernel/BaseRequirementsFulfilledValidatorTest.php

File

core/modules/package_manager/src/Validator/BaseRequirementsFulfilledValidator.php, line 33

Namespace

Drupal\package_manager\Validator
View source 
final class BaseRequirementsFulfilledValidator implements EventSubscriberInterface {
    
    /**
     * The priority of this validator.
     *
     * @see ::getSubscribedEvents()
     *
     * @var int
     */
    public const PRIORITY = 200;
    
    /**
     * Validates that base requirements are fulfilled.
     *
     * @param \Drupal\package_manager\Event\PreOperationStageEvent $event
     *   The event.
     */
    public function validate(PreOperationStageEvent $event) : void {
        // If there are any errors from the validators which ran before this one,
        // base requirements are not fulfilled. Stop any further validators from
        // running.
        if ($event->getResults(SystemManager::REQUIREMENT_ERROR)) {
            $event->stopPropagation();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() : array {
        return [
            PreCreateEvent::class => [
                'validate',
                self::PRIORITY,
            ],
            PreRequireEvent::class => [
                'validate',
                self::PRIORITY,
            ],
            PreApplyEvent::class => [
                'validate',
                self::PRIORITY,
            ],
            StatusCheckEvent::class => [
                'validate',
                self::PRIORITY,
            ],
        ];
    }

}

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