Add LiveListenerMethodsShouldBePublicRule

README.md

@@ -92,6 +92,68 @@ final class TodoList
 
 <br>
 
+### LiveListenerMethodsShouldBePublicRule
+
+Enforces that all methods annotated with `#[LiveListener]` in LiveComponents must be declared as public.
+LiveListener methods need to be publicly accessible to be invoked when listening to events from the frontend.
+
+```yaml
+rules:
+    - Kocal\PHPStanSymfonyUX\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule
+```
+
+```php
+// src/Twig/Components/Notification.php
+namespace App\Twig\Components;
+
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+#[AsLiveComponent]
+final class Notification
+{
+    #[LiveListener('notification:received')]
+    private function onNotificationReceived(): void
+    {
+    }
+
+    #[LiveListener('notification:dismissed')]
+    protected function onNotificationDismissed(): void
+    {
+    }
+}
+```
+
+:x:
+
+<br>
+
+```php
+// src/Twig/Components/Notification.php
+namespace App\Twig\Components;
+
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+#[AsLiveComponent]
+final class Notification
+{
+    #[LiveListener('notification:received')]
+    public function onNotificationReceived(): void
+    {
+    }
+
+    #[LiveListener('notification:dismissed')]
+    public function onNotificationDismissed(): void
+    {
+    }
+}
+```
+
+:+1:
+
+<br>
+
 ## TwigComponent Rules
 
 > [!NOTE]

src/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Rules\LiveComponent;
+
+use Kocal\PHPStanSymfonyUX\NodeAnalyzer\AttributeFinder;
+use PhpParser\Node;
+use PhpParser\Node\Stmt\Class_;
+use PHPStan\Analyser\Scope;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+/**
+ * @implements Rule<Class_>
+ */
+final class LiveListenerMethodsShouldBePublicRule implements Rule
+{
+    public function getNodeType(): string
+    {
+        return Class_::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        if (! AttributeFinder::findAnyAttribute($node, [AsLiveComponent::class])) {
+            return [];
+        }
+
+        $errors = [];
+
+        foreach ($node->getMethods() as $method) {
+            if (! AttributeFinder::findAnyAttribute($method, [LiveListener::class])) {
+                continue;
+            }
+
+            if (! $method->isPublic()) {
+                $errors[] = RuleErrorBuilder::message(sprintf(
+                    'LiveListener method "%s()" should be public.',
+                    $method->name->toString()
+                ))
+                    ->identifier('symfonyUX.liveComponent.liveListenerMethodShouldBePublic')
+                    ->line($method->getLine())
+                    ->tip('Change the method visibility to public.')
+                    ->build();
+            }
+        }
+
+        return $errors;
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/Fixture/NoLiveListener.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Tests\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule\Fixture;
+
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+
+#[AsLiveComponent]
+final class NoLiveListener
+{
+    protected function someProtectedMethod(): void
+    {
+    }
+
+    private function somePrivateMethod(): void
+    {
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/Fixture/NotAComponent.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Tests\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule\Fixture;
+
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+final class NotAComponent
+{
+    #[LiveListener('some.event')]
+    private function onSomeEvent(): void
+    {
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/Fixture/PrivateLiveListener.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Tests\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule\Fixture;
+
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+#[AsLiveComponent]
+final class PrivateLiveListener
+{
+    #[LiveListener('another.event')]
+    protected function onAnotherEvent(): void
+    {
+    }
+
+    #[LiveListener('some.event')]
+    private function onSomeEvent(): void
+    {
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/Fixture/PublicLiveListener.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Tests\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule\Fixture;
+
+use Symfony\UX\LiveComponent\Attribute\AsLiveComponent;
+use Symfony\UX\LiveComponent\Attribute\LiveListener;
+
+#[AsLiveComponent]
+final class PublicLiveListener
+{
+    #[LiveListener('some.event')]
+    public function onSomeEvent(): void
+    {
+    }
+
+    #[LiveListener('another.event')]
+    public function onAnotherEvent(): void
+    {
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/LiveListenerMethodsShouldBePublicRuleTest.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kocal\PHPStanSymfonyUX\Tests\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule;
+
+use Kocal\PHPStanSymfonyUX\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule;
+use PHPStan\Rules\Rule;
+use PHPStan\Testing\RuleTestCase;
+
+/**
+ * @extends RuleTestCase<LiveListenerMethodsShouldBePublicRule>
+ */
+final class LiveListenerMethodsShouldBePublicRuleTest extends RuleTestCase
+{
+    public function testViolations(): void
+    {
+        $this->analyse(
+            [__DIR__ . '/Fixture/PrivateLiveListener.php'],
+            [
+                [
+                    'LiveListener method "onAnotherEvent()" should be public.',
+                    13,
+                    'Change the method visibility to public.',
+                ],
+                [
+                    'LiveListener method "onSomeEvent()" should be public.',
+                    18,
+                    'Change the method visibility to public.',
+                ],
+            ]
+        );
+    }
+
+    public function testNoViolations(): void
+    {
+        $this->analyse(
+            [__DIR__ . '/Fixture/NotAComponent.php'],
+            []
+        );
+
+        $this->analyse(
+            [__DIR__ . '/Fixture/PublicLiveListener.php'],
+            []
+        );
+
+        $this->analyse(
+            [__DIR__ . '/Fixture/NoLiveListener.php'],
+            []
+        );
+    }
+
+    public static function getAdditionalConfigFiles(): array
+    {
+        return [__DIR__ . '/config/configured_rule.neon'];
+    }
+
+    protected function getRule(): Rule
+    {
+        return self::getContainer()->getByType(LiveListenerMethodsShouldBePublicRule::class);
+    }
+}

tests/Rules/LiveComponent/LiveListenerMethodsShouldBePublicRule/config/configured_rule.neon

@@ -0,0 +1,2 @@
+rules:
+    - Kocal\PHPStanSymfonyUX\Rules\LiveComponent\LiveListenerMethodsShouldBePublicRule