[DowngradePhp83] Add DowngradeDynamicClassConstFetchRector (#280)

* [DowngradePhp83] Add DowngradeDynamicClassConstFetchRector

* cleasns up

* cleasns up

Author: samsonasik

config/set/downgrade-php83.php

@@ -6,11 +6,13 @@
 use Rector\DowngradePhp83\Rector\Class_\DowngradeReadonlyAnonymousClassRector;
 use Rector\ValueObject\PhpVersion;
 use Rector\DowngradePhp83\Rector\ClassConst\DowngradeTypedClassConstRector;
+use Rector\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector;
 
 return static function (RectorConfig $rectorConfig): void {
     $rectorConfig->phpVersion(PhpVersion::PHP_82);
     $rectorConfig->rules([
         DowngradeTypedClassConstRector::class,
         DowngradeReadonlyAnonymousClassRector::class,
+        DowngradeDynamicClassConstFetchRector::class,
     ]);
 };

rules-tests/DowngradePhp83/Rector/ClassConstFetch/DowngradeDynamicClassConstFetchRector/DowngradeDynamicClassConstFetchRectorTest.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class DowngradeDynamicClassConstFetchRectorTest extends AbstractRectorTestCase
+{
+    #[DataProvider('provideData')]
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}

rules-tests/DowngradePhp83/Rector/ClassConstFetch/DowngradeDynamicClassConstFetchRector/Fixture/fixture.php.inc

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector\Fixture;
+
+class Fixture
+{
+    public const string FOO = 'foo';
+
+    public function run()
+    {
+        $someValue = 'FOO';
+        Fixture::{$someValue};
+    }
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector\Fixture;
+
+class Fixture
+{
+    public const string FOO = 'foo';
+
+    public function run()
+    {
+        $someValue = 'FOO';
+        constant(Fixture::class . '::' . $someValue);
+    }
+}
+
+?>

rules-tests/DowngradePhp83/Rector/ClassConstFetch/DowngradeDynamicClassConstFetchRector/Fixture/skip_named_class_const_fetch.php.inc

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector\Fixture;
+
+class SkipNamedClassConstFetch
+{
+    public const FOO = 'foo';
+
+    public function run()
+    {
+        return self::FOO;
+    }
+}

rules-tests/DowngradePhp83/Rector/ClassConstFetch/DowngradeDynamicClassConstFetchRector/config/configured_rule.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rule(DowngradeDynamicClassConstFetchRector::class);
+};

rules/DowngradePhp83/Rector/ClassConstFetch/DowngradeDynamicClassConstFetchRector.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp83\Rector\ClassConstFetch;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\BinaryOp\Concat;
+use PhpParser\Node\Expr\ClassConstFetch;
+use PhpParser\Node\Identifier;
+use PhpParser\Node\Scalar\String_;
+use Rector\Rector\AbstractRector;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * @changelog https://wiki.php.net/rfc/dynamic_class_constant_fetch
+ *
+ * @see \Rector\Tests\DowngradePhp83\Rector\ClassConstFetch\DowngradeDynamicClassConstFetchRector\DowngradeDynamicClassConstFetchRectorTest
+ */
+final class DowngradeDynamicClassConstFetchRector extends AbstractRector
+{
+    /**
+     * @return array<class-string<Node>>
+     */
+    public function getNodeTypes(): array
+    {
+        return [ClassConstFetch::class];
+    }
+
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Change dynamic class const fetch Example::{$constName} to constant(Example::class . \'::\' . $constName)',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+$value = Example::{$constName};
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+$value = constant(Example::class . '::' . $constName);
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @param ClassConstFetch $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if ($node->name instanceof Identifier) {
+            return null;
+        }
+
+        return $this->nodeFactory->createFuncCall('constant', [
+            new Concat(
+                new Concat(new ClassConstFetch($node->class, new Identifier('class')), new String_('::')),
+                $node->name
+            ),
+        ]);
+    }
+}