composer require symfony/workflow

# config/packages/workflow.yaml
framework:
    workflows:
        blog_publishing:
            type: 'workflow' # or 'state_machine'
            audit_trail:
                enabled: true
            marking_store:
                type: 'method'
                property: 'currentPlace'
            supports:
                - App\Entity\BlogPost
            initial_marking: draft
            places:
                - draft
                - reviewed
                - rejected
                - published
            transitions:
                to_review:
                    from: draft
                    to: reviewed
                publish:
                    from: reviewed
                    to: published
                reject:
                    from: reviewed
                    to: rejected

// config/packages/workflow.php
use App\Entity\BlogPost;
use Symfony\Config\FrameworkConfig;

return static function (FrameworkConfig $framework): void {
    $blogPublishing = $framework->workflows()->workflow('blog_publishing');
    $blogPublishing
        ->type('workflow')
        ->supports([BlogPost::class])
        ->initialMarking(['draft']);

    $blogPublishing->auditTrail()->enabled(true);
    $blogPublishing->markingStore()
        ->type('method')
        ->property('currentPlace');

    $blogPublishing->place()->name('draft');
    $blogPublishing->place()->name('reviewed');
    $blogPublishing->place()->name('rejected');
    $blogPublishing->place()->name('published');

    $blogPublishing->transition()
        ->name('to_review')
        ->from('draft')
        ->to('reviewed');

    $blogPublishing->transition()
        ->name('publish')
        ->from('reviewed')
        ->to('published');

    $blogPublishing->transition()
        ->name('reject')
        ->from('reviewed')
        ->to('rejected');
};

namespace App\Entity;

class BlogPost
{
    private string $currentPlace;
    private string $title;
    private string $content;

    public function getCurrentPlace(): string
    {
        return $this->currentPlace;
    }

    public function setCurrentPlace(string $currentPlace, array $context = []): void
    {
        $this->currentPlace = $currentPlace;
    }
}

use Symfony\Component\Workflow\WorkflowInterface;

class BlogPostController
{
    public function __construct(
        private WorkflowInterface $blogPublishingWorkflow,
    ) {
    }

    public function review(BlogPost $post): void
    {
        // Check if transition is possible
        if ($this->blogPublishingWorkflow->can($post, 'to_review')) {
            // Apply transition
            $this->blogPublishingWorkflow->apply($post, 'to_review');
        }

        // Get all enabled transitions
        $transitions = $this->blogPublishingWorkflow->getEnabledTransitions($post);

        // Get current marking
        $marking = $this->blogPublishingWorkflow->getMarking($post);
    }
}

use Symfony\Component\DependencyInjection\Attribute\Target;
use Symfony\Component\Workflow\WorkflowInterface;

class MyService
{
    public function __construct(
        #[Target('blog_publishing')] private WorkflowInterface $workflow,
    ) {
    }
}

namespace App\EventSubscriber;

use App\Entity\BlogPost;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Workflow\Event\GuardEvent;

class BlogPostReviewSubscriber implements EventSubscriberInterface
{
    public function guardReview(GuardEvent $event): void
    {
        /** @var BlogPost $post */
        $post = $event->getSubject();

        if (empty($post->getTitle())) {
            $event->setBlocked(true, 'Cannot review without a title.');
        }
    }

    public static function getSubscribedEvents(): array
    {
        return [
            'workflow.blog_publishing.guard.to_review' => ['guardReview'],
        ];
    }
}

use Symfony\Component\Workflow\Event\GuardEvent;
use Symfony\Component\Workflow\TransitionBlocker;

public function guardPublish(GuardEvent $event): void
{
    $hourLimit = $event->getMetadata('hour_limit', $event->getTransition());

    if (date('H') > $hourLimit) {
        $event->addTransitionBlocker(
            new TransitionBlocker('Cannot publish after 8 PM.', '0')
        );
    }
}

framework:
    workflows:
        blog_publishing:
            transitions:
                to_review:
                    guard: "is_granted('ROLE_REVIEWER')"
                    from: draft
                    to: reviewed
                publish:
                    guard: "is_authenticated and subject.isReady()"
                    from: reviewed
                    to: published

use Symfony\Component\Workflow\Attribute\AsTransitionListener;
use Symfony\Component\Workflow\Attribute\AsGuardListener;
use Symfony\Component\Workflow\Attribute\AsEnteredListener;

class ArticleWorkflowListener
{
    #[AsGuardListener(workflow: 'blog_publishing', transition: 'publish')]
    public function onGuardPublish(GuardEvent $event): void
    {
        // Validate transition
    }

    #[AsTransitionListener(workflow: 'blog_publishing', transition: 'publish')]
    public function onTransition(TransitionEvent $event): void
    {
        // During transition
    }

    #[AsEnteredListener(workflow: 'blog_publishing', place: 'published')]
    public function onEnteredPublished(EnteredEvent $event): void
    {
        // After entering published state
    }
}

{# Check if transition is possible #}
{% if workflow_can(post, 'publish') %}
    <a href="...">Publish</a>
{% endif %}

{# Get all enabled transitions #}
{% for transition in workflow_transitions(post) %}
    <a href="...">{{ transition.name }}</a>
{% endfor %}

{# Check marked places #}
{% if workflow_has_marked_place(post, 'reviewed') %}
    <span>Ready for review</span>
{% endif %}

{# Get transition blockers #}
{% for blocker in workflow_transition_blockers(post, 'publish') %}
    <span class="error">{{ blocker.message }}</span>
{% endfor %}

# Dump workflow visualization
php bin/console workflow:dump blog_publishing

# Debug autowiring
php bin/console debug:autowiring workflow