Support array_values in ArrayFirstLastRector

Author: Orest-Divintari

rules-tests/Php85/Rector/ArrayDimFetch/ArrayFirstLastRector/Fixture/array_values_pattern.php.inc

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php85\Rector\ArrayDimFetch\ArrayFirstLastRector\Fixture;
+
+final class ArrayValuesPattern
+{
+    public function run(array $array)
+    {
+        echo array_values($array)[0];
+        echo array_values($array)[count($array) - 1];
+    }
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php85\Rector\ArrayDimFetch\ArrayFirstLastRector\Fixture;
+
+final class ArrayValuesPattern
+{
+    public function run(array $array)
+    {
+        echo array_first($array);
+        echo array_last($array);
+    }
+}
+
+?>

rules-tests/Php85/Rector/ArrayDimFetch/ArrayFirstLastRector/Fixture/skip_array_values_different_variable.php.inc

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php85\Rector\ArrayDimFetch\ArrayFirstLastRector\Fixture;
+
+final class SkipArrayValuesDifferentVariable
+{
+    public function run(array $array, array $differentVariable)
+    {
+        echo array_values($array)[count($differentVariable) - 1];
+    }
+}

rules/Php85/Rector/ArrayDimFetch/ArrayFirstLastRector.php

@@ -6,7 +6,9 @@
 
 use PhpParser\Node;
 use PhpParser\Node\Expr\ArrayDimFetch;
+use PhpParser\Node\Expr\BinaryOp\Minus;
 use PhpParser\Node\Expr\FuncCall;
+use PhpParser\Node\Scalar\Int_;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Rector\PHPStan\ScopeFetcher;
 use Rector\Rector\AbstractRector;
@@ -40,11 +42,15 @@ public function getRuleDefinition(): RuleDefinition
                     <<<'CODE_SAMPLE'
 echo $array[array_key_first($array)];
 echo $array[array_key_last($array)];
+echo array_values($array)[0];
+echo array_values($array)[count($array) - 1];
 CODE_SAMPLE
                     ,
                     <<<'CODE_SAMPLE'
 echo array_first($array);
 echo array_last($array);
+echo array_first($array);
+echo array_last($array);
 CODE_SAMPLE
                 ),
             ]
@@ -63,6 +69,24 @@ public function getNodeTypes(): array
      * @param ArrayDimFetch $node
      */
     public function refactor(Node $node): ?FuncCall
+    {
+        if ($node->dim instanceof FuncCall) {
+            return $this->refactorArrayKeyPattern($node);
+        }
+
+        if ($node->var instanceof FuncCall && ($node->dim instanceof Int_ || $node->dim instanceof Minus)) {
+            return $this->refactorArrayValuesPattern($node);
+        }
+
+        return null;
+    }
+
+    public function provideMinPhpVersion(): int
+    {
+        return PhpVersionFeature::ARRAY_FIRST_LAST;
+    }
+
+    private function refactorArrayKeyPattern(ArrayDimFetch $node): ?FuncCall
     {
         if (! $node->dim instanceof FuncCall) {
             return null;
@@ -100,8 +124,68 @@ public function refactor(Node $node): ?FuncCall
         return $this->nodeFactory->createFuncCall($functionName, [$node->var]);
     }
 
-    public function provideMinPhpVersion(): int
+    private function refactorArrayValuesPattern(ArrayDimFetch $node): ?FuncCall
     {
-        return PhpVersionFeature::ARRAY_FIRST_LAST;
+        if (! $node->var instanceof FuncCall) {
+            return null;
+        }
+
+        if (! $this->isName($node->var, 'array_values')) {
+            return null;
+        }
+
+        if ($node->var->isFirstClassCallable()) {
+            return null;
+        }
+
+        if (count($node->var->getArgs()) !== 1) {
+            return null;
+        }
+
+        $scope = ScopeFetcher::fetch($node);
+        if ($scope->isInExpressionAssign($node)) {
+            return null;
+        }
+
+        if ($node->getAttribute(AttributeKey::IS_UNSET_VAR)) {
+            return null;
+        }
+
+        $arrayArg = $node->var->getArgs()[0]
+            ->value;
+
+        if ($node->dim instanceof Int_ && $node->dim->value === 0) {
+            return $this->nodeFactory->createFuncCall('array_first', [$arrayArg]);
+        }
+
+        if ($node->dim instanceof Minus) {
+            if (! $node->dim->left instanceof FuncCall) {
+                return null;
+            }
+
+            if (! $this->isName($node->dim->left, 'count')) {
+                return null;
+            }
+
+            if ($node->dim->left->isFirstClassCallable()) {
+                return null;
+            }
+
+            if (count($node->dim->left->getArgs()) !== 1) {
+                return null;
+            }
+
+            if (! $node->dim->right instanceof Int_ || $node->dim->right->value !== 1) {
+                return null;
+            }
+
+            if (! $this->nodeComparator->areNodesEqual($arrayArg, $node->dim->left->getArgs()[0]->value)) {
+                return null;
+            }
+
+            return $this->nodeFactory->createFuncCall('array_last', [$arrayArg]);
+        }
+
+        return null;
     }
 }