[Php81] Handle on ternary on NullToStrictStringFuncCallArgRector (#7091)

* ci: Create skip_existing_casts.php.inc

* Closes #7089

* Closes #7089

---------

Co-authored-by: Caleb White <cdwhite3@pm.me>

Author: samsonasik

rules-tests/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector/Fixture/with_existing_cast_on_ternary.php.inc

@@ -0,0 +1,51 @@
+<?php
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector\Fixture;
+
+final class WithExistingCastOnTernary
+{
+    public function run()
+    {
+        return $relpath
+            . '/' . rawurlencode((string) $this->Get('account_code') ?: $this->Get('customer_id'));
+    }
+
+    public function run2()
+    {
+        return $relpath
+            . '/' . rawurlencode((string) $this->Get('account_code') ?: null);
+    }
+
+    public function Get($fieldname)
+    {
+        return $this->{$fieldname} ?? null;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector\Fixture;
+
+final class WithExistingCastOnTernary
+{
+    public function run()
+    {
+        return $relpath
+            . '/' . rawurlencode((string) $this->Get('account_code') ?: (string) $this->Get('customer_id'));
+    }
+
+    public function run2()
+    {
+        return $relpath
+            . '/' . rawurlencode((string) $this->Get('account_code') ?: '');
+    }
+
+    public function Get($fieldname)
+    {
+        return $this->{$fieldname} ?? null;
+    }
+}
+
+?>

rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php

@@ -8,9 +8,9 @@
 use PhpParser\Node\Arg;
 use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\Cast\String_ as CastString_;
-use PhpParser\Node\Expr\ConstFetch;
 use PhpParser\Node\Expr\FuncCall;
 use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\Ternary;
 use PhpParser\Node\Identifier;
 use PhpParser\Node\Scalar\InterpolatedString;
 use PhpParser\Node\Scalar\String_;
@@ -192,51 +192,68 @@ private function processNullToStrictStringOnNodePosition(
 
         $argValue = $args[$position]->value;
 
-        if ($argValue instanceof ConstFetch && $this->valueResolver->isNull($argValue)) {
+        if ($this->valueResolver->isNull($argValue)) {
             $args[$position]->value = new String_('');
             $funcCall->args = $args;
 
             return $funcCall;
         }
 
-        $type = $this->nodeTypeResolver->getType($argValue);
-        if ($type->isString()->yes()) {
+        if ($this->shouldSkipValue($argValue, $scope, $isTrait)) {
             return null;
         }
 
-        $nativeType = $this->nodeTypeResolver->getNativeType($argValue);
-        if ($nativeType->isString()->yes()) {
-            return null;
+        $parameter = $parametersAcceptor->getParameters()[$position] ?? null;
+        if ($parameter instanceof ExtendedNativeParameterReflection && $parameter->getType() instanceof UnionType) {
+            $parameterType = $parameter->getType();
+            if (! $this->isValidUnionType($parameterType)) {
+                return null;
+            }
         }
 
-        if ($this->shouldSkipType($type)) {
-            return null;
+        if ($argValue instanceof Ternary && ! $this->shouldSkipValue($argValue->else, $scope, $isTrait)) {
+            if ($this->valueResolver->isNull($argValue->else)) {
+                $argValue->else = new String_('');
+            } else {
+                $argValue->else = new CastString_($argValue->else);
+            }
+
+            $args[$position]->value = $argValue;
+            $funcCall->args = $args;
+            return $funcCall;
         }
 
-        if ($argValue instanceof InterpolatedString) {
-            return null;
+        $args[$position]->value = new CastString_($argValue);
+        $funcCall->args = $args;
+
+        return $funcCall;
+    }
+
+    private function shouldSkipValue(Expr $expr, Scope $scope, bool $isTrait): bool
+    {
+        $type = $this->nodeTypeResolver->getType($expr);
+        if ($type->isString()->yes()) {
+            return true;
         }
 
-        if ($this->isAnErrorType($argValue, $nativeType, $scope)) {
-            return null;
+        $nativeType = $this->nodeTypeResolver->getNativeType($expr);
+        if ($nativeType->isString()->yes()) {
+            return true;
         }
 
-        if ($this->shouldSkipTrait($argValue, $type, $isTrait)) {
-            return null;
+        if ($this->shouldSkipType($type)) {
+            return true;
         }
 
-        $parameter = $parametersAcceptor->getParameters()[$position] ?? null;
-        if ($parameter instanceof ExtendedNativeParameterReflection && $parameter->getType() instanceof UnionType) {
-            $parameterType = $parameter->getType();
-            if (! $this->isValidUnionType($parameterType)) {
-                return null;
-            }
+        if ($expr instanceof InterpolatedString) {
+            return true;
         }
 
-        $args[$position]->value = new CastString_($argValue);
-        $funcCall->args = $args;
+        if ($this->isAnErrorType($expr, $nativeType, $scope)) {
+            return true;
+        }
 
-        return $funcCall;
+        return $this->shouldSkipTrait($expr, $type, $isTrait);
     }
 
     private function isValidUnionType(Type $type): bool