Attempt to discover deprecations on constants

Author: mglaman

extension.neon

@@ -21,6 +21,7 @@ rules:
 	- PHPStan\Rules\Drupal\Coder\DiscouragedFunctionsRule
 	- PHPStan\Rules\Drupal\GlobalDrupalDependencyInjectionRule
 	- PHPStan\Rules\Drupal\PluginManager\PluginManagerSetsCacheBackendRule
+	- PHPStan\Rules\Deprecations\AccessDeprecatedConstant
 services:
 	drupal.serviceMapFactory:
 		class: PHPStan\Drupal\ServiceMapFactory

src/Rules/Deprecations/AccessDeprecatedConstant.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Rules\Deprecations;
+
+use PhpParser\Node;
+use PHPStan\Analyser\Scope;
+use PHPStan\Broker\Broker;
+use PHPStan\Rules\RuleLevelHelper;
+
+class AccessDeprecatedConstant implements \PHPStan\Rules\Rule
+{
+    /** @var Broker */
+    private $broker;
+    /** @var RuleLevelHelper */
+    private $ruleLevelHelper;
+    public function __construct(Broker $broker, RuleLevelHelper $ruleLevelHelper)
+    {
+        $this->broker = $broker;
+        $this->ruleLevelHelper = $ruleLevelHelper;
+    }
+
+    public function getNodeType(): string
+    {
+        return Node\Expr\ConstFetch::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        if (DeprecatedScopeHelper::isScopeDeprecated($scope)) {
+            return [];
+        }
+
+        // comment is not resolved.
+        $comment = $node->getDocComment();
+        $constnatName = $this->broker->resolveConstantName($node->name, $scope);
+        return [];
+    }
+
+}

tests/src/DeprecationRulesTest.php

@@ -19,6 +19,21 @@ public function testDeprecationRules(string $path, int $count, array $errorMessa
 
     public function dataDeprecatedSamples(): \Generator
     {
+//        yield [
+//            __DIR__ . '/../fixtures/drupal/modules/phpstan_fixtures/src/UsesDeprecatedUrlFunction.php',
+//            2,
+//            [
+//                '\Drupal calls should be avoided in classes, use dependency injection instead',
+//                'Call to deprecated method url() of class Drupal.'
+//            ]
+//        ];
+//        yield [
+//            __DIR__ . '/../fixtures/drupal/core/lib/Drupal/Core/Entity/EntityManager.php',
+//            1,
+//            [
+//                'Class Drupal\Core\Entity\EntityManager implements deprecated interface Drupal\Core\Entity\EntityManagerInterface.'
+//            ]
+//        ];
         yield [
             __DIR__ . '/../fixtures/drupal/modules/phpstan_fixtures/src/UsesDeprecatedUrlFunction.php',
             2,