List invalid schema errors as tips

Author: vojtech-dobes

src/GraphQL/CorrespondanceRule.php

@@ -45,12 +45,23 @@ class_exists($invalidClassName) === false
 			}
 
 			if ($this->reflectionProvider->hasClass($invalidClassName)) {
-				$result[] = PHPStan\Rules\RuleErrorBuilder::message("GraphQL schema isn't valid.")
+				$ruleError = PHPStan\Rules\RuleErrorBuilder::message("GraphQL schema isn't valid.")
 					->identifier('graphql.schemaInvalid')
 					->file($schemaName)
 					->line(0)
-					->nonIgnorable()
-					->build();
+					->nonIgnorable();
+
+				$errors = $this->reflectionProvider
+					->getClass($invalidClassName)
+					->getNativeProperty('errors')
+					->getNativeReflection()
+					->getDefaultValue();
+
+				foreach ($errors as $error) {
+					$ruleError = $ruleError->addTip($error['message']);
+				}
+
+				$result[] = $ruleError->build();
 
 				continue;
 			}

src/GraphQL/SchemaClassGenerator.php

@@ -57,7 +57,16 @@ private function generateInvalidSchemaClass(
 		$file = new Nette\PhpGenerator\PhpFile();
 		$file->setStrictTypes();
 
-		$file->addClass($invalidClassName);
+		$class = $file->addClass($invalidClassName);
+
+		$class->addProperty('errors')
+			->setPublic()
+			->setValue(
+				array_map(
+					static fn ($error) => $error->toResponse(),
+					$e->errors,
+				),
+			);
 
 		Nette\Utils\FileSystem::write(
 			"{$this->generatedDir}/{$invalidClassName}.php",