[DowngradePhp84] Downgrade RoundingMode enum (#260)

* [DowngradePhp84] Downgrade RoundingMode enum

* Review comments

* Fixed description of rule

* Registered rule to downgrade-php84 ruleset

* Used FullyQualified for constant name

* Fixed PHPStan issue

* Formatting

* run rector once more

* ensure FullyQualified check

* add no namespace fixture

* from use

---------

Co-authored-by: Abdul Malik Ikhsan <[email protected]>

config/set/downgrade-php84.php

@@ -3,12 +3,14 @@
 declare(strict_types=1);
 
 use Rector\Config\RectorConfig;
+use Rector\DowngradePhp84\Rector\FuncCall\DowngradeRoundingModeEnumRector;
 use Rector\DowngradePhp84\Rector\MethodCall\DowngradeNewMethodCallWithoutParenthesesRector;
 use Rector\ValueObject\PhpVersion;
 
 return static function (RectorConfig $rectorConfig): void {
     $rectorConfig->phpVersion(PhpVersion::PHP_83);
     $rectorConfig->rules([
         DowngradeNewMethodCallWithoutParenthesesRector::class,
+        DowngradeRoundingModeEnumRector::class,
     ]);
 };

rules-tests/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/DowngradeRoundingModeEnumRectorTest.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp84\Rector\FuncCall\DowngradeRoundingModeEnumRector;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class DowngradeRoundingModeEnumRectorTest 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/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/Fixture/fixture.php.inc

@@ -0,0 +1,37 @@
+<?php
+
+namespace Rector\Tests\Php84\Rector\FuncCall\RoundingModeEnumRector;
+
+round(1.5, 0);
+round(1.5);
+round(1.5, 0, \RoundingMode::HalfAwayFromZero);
+round(1.5, 0, \RoundingMode::HalfTowardsZero);
+round(1.5, 0, \RoundingMode::HalfEven);
+round(1.5, 0, \RoundingMode::HalfOdd);
+round(1.5, 0, \RoundingMode::TowardsZero);
+round(1.5, 0, \RoundingMode::AwayFromZero);
+round(1.5, 0, \RoundingMode::NegativeInfinity);
+round(1.5, 0, \RoundingMode::PositiveInfinity);
+round(1.5, 0, 'invalid');
+round(1.5, 0, PHP_INT_MAX);
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php84\Rector\FuncCall\RoundingModeEnumRector;
+
+round(1.5, 0);
+round(1.5);
+round(1.5, 0, \PHP_ROUND_HALF_UP);
+round(1.5, 0, \PHP_ROUND_HALF_DOWN);
+round(1.5, 0, \PHP_ROUND_HALF_EVEN);
+round(1.5, 0, \PHP_ROUND_HALF_ODD);
+round(1.5, 0, \RoundingMode::TowardsZero);
+round(1.5, 0, \RoundingMode::AwayFromZero);
+round(1.5, 0, \RoundingMode::NegativeInfinity);
+round(1.5, 0, \RoundingMode::PositiveInfinity);
+round(1.5, 0, 'invalid');
+round(1.5, 0, PHP_INT_MAX);
+
+?>

rules-tests/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/Fixture/from_use.php.inc

@@ -0,0 +1,19 @@
+<?php
+
+namespace Rector\Tests\Php84\Rector\FuncCall\RoundingModeEnumRector;
+
+use RoundingMode;
+
+round(1.5, 0, RoundingMode::HalfAwayFromZero);
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php84\Rector\FuncCall\RoundingModeEnumRector;
+
+use RoundingMode;
+
+round(1.5, 0, \PHP_ROUND_HALF_UP);
+
+?>

rules-tests/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/Fixture/no_namespace.php.inc

@@ -0,0 +1,11 @@
+<?php
+
+round(1.5, 0, RoundingMode::HalfAwayFromZero);
+
+?>
+-----
+<?php
+
+round(1.5, 0, \PHP_ROUND_HALF_UP);
+
+?>

rules-tests/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/Fixture/skip_indirect_use_of_roundin_mode.php.inc

@@ -0,0 +1,10 @@
+<?php
+
+namespace Rector\Tests\Php84\Rector\FuncCall\RoundingModeEnumRector;
+
+
+$mode = \RoundingMode::HalfTowardsZero;
+
+round(1.5, 0, $mode);
+
+?>

rules-tests/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector/config/configured_rule.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\DowngradePhp84\Rector\FuncCall\DowngradeRoundingModeEnumRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rule(DowngradeRoundingModeEnumRector::class);
+};

rules/DowngradePhp84/Rector/FuncCall/DowngradeRoundingModeEnumRector.php

@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp84\Rector\FuncCall;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\ClassConstFetch;
+use PhpParser\Node\Expr\ConstFetch;
+use PhpParser\Node\Expr\FuncCall;
+use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Identifier;
+use PhpParser\Node\Name\FullyQualified;
+use Rector\Rector\AbstractRector;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * @changelog wiki.php.net/rfc/correctly_name_the_rounding_mode_and_make_it_an_enum
+ *
+ * @see \Rector\Tests\DowngradePhp84\Rector\FuncCall\DowngradeRoundingModeEnumRector\DowngradeRoundingModeEnumRectorTest
+ */
+final class DowngradeRoundingModeEnumRector extends AbstractRector
+{
+    public function getNodeTypes(): array
+    {
+        return [FuncCall::class];
+    }
+
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Replace RoundingMode enum to rounding mode constant in round()',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+round(1.5, 0, RoundingMode::HalfAwayFromZero);
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+round(1.5, 0, PHP_ROUND_HALF_UP);
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @param MethodCall $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if (! $this->isName($node, 'round')) {
+            return null;
+        }
+
+        if ($node->isFirstClassCallable()) {
+            return null;
+        }
+
+        $args = $node->getArgs();
+
+        if (count($args) !== 3) {
+            return null;
+        }
+
+        if (! isset($args[2])) {
+            return null;
+        }
+
+        $modeArg = $args[2]->value;
+        $hasChanged = false;
+        if ($modeArg instanceof ClassConstFetch && $modeArg->class instanceof FullyQualified && $this->isName(
+            $modeArg->class,
+            'RoundingMode'
+        )) {
+            if (! $modeArg->name instanceof Identifier) {
+                return null;
+            }
+
+            $constantName = match ($modeArg->name->name) {
+                'HalfAwayFromZero' => 'PHP_ROUND_HALF_UP',
+                'HalfTowardsZero' => 'PHP_ROUND_HALF_DOWN',
+                'HalfEven' => 'PHP_ROUND_HALF_EVEN',
+                'HalfOdd' => 'PHP_ROUND_HALF_ODD',
+                default => null,
+            };
+            if ($constantName === null) {
+                return null;
+            }
+
+            $args[2]->value = new ConstFetch(new FullyQualified($constantName));
+            $hasChanged = true;
+        }
+
+        if ($hasChanged) {
+            return $node;
+        }
+
+        return null;
+    }
+}