Use this->t instead of t

Author: Christian Fritsch

src/Rector/BestPractice/UseThisTInsteadOfTRector.php

@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DrupalRector\Rector\BestPractice;
+
+use PhpParser\Node;
+use Rector\Core\Rector\AbstractRector;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\ConfiguredCodeSample;
+use PhpParser\Node\Expr\FuncCall;
+use Rector\NodeTypeResolver\Node\AttributeKey;
+use PhpParser\Node\Stmt\Class_;
+
+/**
+ * Replaces t() with $this->t().
+ */
+final class UseThisTInsteadOfTRector extends AbstractRector
+{
+
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Turns static t calls into $this->t.',
+            [
+                new ConfiguredCodeSample(
+                    't("Text");',
+                    '$this->t("Text");',
+                    ['t' => '$this->t']
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @return array<class-string<Node>>
+     */
+    public function getNodeTypes(): array
+    {
+        return [FuncCall::class];
+    }
+
+    /**
+     * @param FuncCall $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if (!$this->isName($node, 't')) {
+            return null;
+        }
+
+        // not to refactor here
+        $isVirtual = (bool)$node->name->getAttribute(
+            AttributeKey::VIRTUAL_NODE
+        );
+        if ($isVirtual) {
+            return null;
+        }
+
+        $parentFunction = $this->betterNodeFinder->findParentType($node, Node\Stmt\ClassMethod::class);
+        if (!$parentFunction instanceof Node\Stmt\ClassMethod || $parentFunction->isStatic()) {
+            return null;
+        }
+
+        $class = $this->betterNodeFinder->findParentType($node, Class_::class);
+        if (!$class instanceof Class_) {
+            return null;
+        }
+
+        $className = (string) $this->nodeNameResolver->getName($class);
+        if (method_exists($className, 't')) {
+            return new Node\Expr\MethodCall(
+                new Node\Expr\Variable('this'),
+                't',
+                $node->args
+            );
+        }
+        return null;
+    }
+}