implement event name references for "AsEventListener" attribute

Author: Haehnchen

src/main/java/fr/adrienbrault/idea/symfony2plugin/config/php/PhpConfigReferenceContributor.java

@@ -62,13 +62,33 @@ public void registerReferenceProviders(@NotNull PsiReferenceRegistrar psiReferen
             .addCall("\\Symfony\\Component\\EventDispatcher\\EventDispatcherInterface", "dispatch")
         );
 
+        // #[AsEventListener(event: '<caret>')]
+        psiReferenceRegistrar.registerReferenceProvider(
+            PhpElementsUtil.getAttributeNamedArgumentStringLiteralPattern("\\Symfony\\Component\\EventDispatcher\\Attribute\\AsEventListener", "event"),
+            new PsiReferenceProvider() {
+                @Override
+                public PsiReference @NotNull [] getReferencesByElement(@NotNull PsiElement element, @NotNull ProcessingContext context) {
+                    if (!Symfony2ProjectComponent.isEnabled(element) || !(element instanceof StringLiteralExpression stringLiteralExpression)) {
+                        return new PsiReference[0];
+                    }
+
+                    return new PsiReference[]{
+                        new EventDispatcherEventReference(element, stringLiteralExpression.getContents())
+                    };
+                }
+
+                public boolean acceptsTarget(@NotNull PsiElement target) {
+                    return Symfony2ProjectComponent.isEnabled(target);
+                }
+            }
+        );
+
         psiReferenceRegistrar.registerReferenceProvider(
             PhpElementsUtil.getMethodWithFirstStringOrNamedArgumentPattern(),
             new PsiReferenceProvider() {
                 @NotNull
                 @Override
                 public PsiReference @NotNull [] getReferencesByElement(@NotNull PsiElement psiElement, @NotNull ProcessingContext processingContext) {
-
                     if (!Symfony2ProjectComponent.isEnabled(psiElement)) {
                         return new PsiReference[0];
                     }

src/main/java/fr/adrienbrault/idea/symfony2plugin/util/PhpElementsUtil.java

@@ -489,7 +489,14 @@ public static PsiElementPattern.Capture<PsiElement> getAttributeNamedArgumentStr
                 PhpTokenTypes.STRING_LITERAL_SINGLE_QUOTE,
                 PhpTokenTypes.STRING_LITERAL
             ))
-            .withParent(PlatformPatterns.psiElement(StringLiteralExpression.class)
+            .withParent(getAttributeNamedArgumentStringLiteralPattern(clazz, namedArgument));
+    }
+
+    /**
+     * #[Security(foobar: "is_granted('POST_SHOW')")]
+     */
+    public static PsiElementPattern.@NotNull Capture<StringLiteralExpression> getAttributeNamedArgumentStringLiteralPattern(@NotNull String clazz, @NotNull String namedArgument) {
+        return PlatformPatterns.psiElement(StringLiteralExpression.class)
                 .afterLeafSkipping(
                     PlatformPatterns.psiElement(PsiWhiteSpace.class),
                     PlatformPatterns.psiElement(PhpTokenTypes.opCOLON).afterLeafSkipping(
@@ -501,8 +508,7 @@ public static PsiElementPattern.Capture<PsiElement> getAttributeNamedArgumentStr
                     .withParent(PlatformPatterns.psiElement(PhpAttribute.class)
                         .with(new AttributeInstancePatternCondition(clazz))
                     )
-                )
-            );
+                );
     }
 
     /**

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/config/php/PhpConfigReferenceContributorTest.java

@@ -38,4 +38,19 @@ public void testTagReferences() {
             "foobar"
         );
     }
+
+    public void testEventNameCompletionForAsEventListener() {
+        assertCompletionContains(PhpFileType.INSTANCE, "<?php\n" +
+                "namespace App\\EventListener;\n" +
+                "\n" +
+                "use Symfony\\Component\\EventDispatcher\\Attribute\\AsEventListener;\n" +
+                "\n" +
+                "#[AsEventListener(event: '<caret>')]\n" +
+                "final class MyMultiListener implements \\Symfony\\Component\\EventDispatcher\\EventSubscriberInterface\n" +
+                "{\n" +
+                "\n" +
+                "}",
+            "yaml_event_2"
+        );
+    }
 }

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/config/php/fixtures/classes.php

@@ -25,3 +25,25 @@ interface MessageSubscriberInterface
         public static function getHandledMessages(): iterable;
     }
 }
+
+namespace Symfony\Component\EventDispatcher
+{
+    interface EventSubscriberInterface
+    {
+    }
+}
+
+namespace Symfony\Component\EventDispatcher\Attribute
+{
+    #[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
+    class AsEventListener
+    {
+        public function __construct(
+            public ?string $event = null,
+            public ?string $method = null,
+            public int $priority = 0,
+            public ?string $dispatcher = null,
+        ) {
+        }
+    }
+}

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/config/php/fixtures/services.yml

@@ -1,2 +1,7 @@
 services:
-    my_nice_service: ~
+    my_nice_service: ~
+
+    foo_service:
+        class: DateTime
+        tags:
+            - { name: "kernel.event_listener", event: "yaml_event_2", method: onKernelException }