Add property defaults assembler

docs/code-generation/assemblers.md

@@ -19,6 +19,7 @@ to generate the code you want to add to the generated SOAP types.
 - [IteratorAssembler](#iteratorassembler)
 - [JsonSerializableAssembler](#jsonserializableassembler)
 - [PropertyAssembler](#propertyassembler)
+- [PropertyDefaultsAssembler](#propertydefaultsassembler)
 - [RequestAssembler](#requestassembler)
 - [ResultAssembler](#resultassembler)
 - [ResultProviderAssembler](#resultproviderassembler)
@@ -317,6 +318,19 @@ new PropertyAssembler(PropertyGenerator::VISIBILITY_PROTECTED)
 Please note that the default ruleset has a visibility of private.
 If you want to override this, you will have to override all rules by calling `Phpro\SoapClient\CodeGenerator\Config\Config::setRuleSet`.
 
+## PropertyDefaultsAssembler
+
+This `PropertyDefaultsAssembler` can be used together with the default `PropertyAssembler` and can be used to determine basic default values for specific properties.
+It adds default values for following scalar types: `string`, `int`, `float`, `bool`, `array`, `mixed`.
+
+Example output:
+
+```php
+    /**
+     * @var string
+     */
+    private $prop1 = '';
+```
 
 ## RequestAssembler
 

src/Phpro/SoapClient/CodeGenerator/Assembler/PropertyDefaultsAssembler.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Phpro\SoapClient\CodeGenerator\Assembler;
+
+use Phpro\SoapClient\CodeGenerator\Context\ContextInterface;
+use Phpro\SoapClient\CodeGenerator\Context\PropertyContext;
+use Phpro\SoapClient\Exception\AssemblerException;
+use function Psl\Result\wrap;
+
+final class PropertyDefaultsAssembler implements AssemblerInterface
+{
+    public function canAssemble(ContextInterface $context): bool
+    {
+        return $context instanceof PropertyContext;
+    }
+
+    /**
+     * @param ContextInterface|PropertyContext $context
+     *
+     * @throws AssemblerException
+     */
+    public function assemble(ContextInterface $context): void
+    {
+        $class = $context->getClass();
+        $property = $context->getProperty();
+        $propertyGenerator = $class->getProperty($property->getName());
+        if (!$propertyGenerator) {
+            return;
+        }
+
+        if ($propertyGenerator->getDefaultValue()) {
+            return;
+        }
+
+        $defaultValue = wrap(
+            fn (): mixed => match ($property->getPhpType()) {
+                'mixed' => null,
+                'string' => '',
+                'int' => 0,
+                'bool' => false,
+                'float' => 0.0,
+                'array' => [],
+                default => throw new \RuntimeException('Type with unknown default: ' . $property->getPhpType())
+            }
+        );
+
+        if ($defaultValue->isFailed()) {
+            return;
+        }
+
+        $propertyGenerator
+            ->setDefaultValue($defaultValue->getResult())
+            ->omitDefaultValue(false);
+    }
+}

test/PhproTest/SoapClient/Unit/CodeGenerator/Assembler/PropertyDefaultsAssemblerTest.php

@@ -0,0 +1,118 @@
+<?php
+
+namespace PhproTest\SoapClient\Unit\CodeGenerator\Assembler;
+
+use Phpro\SoapClient\CodeGenerator\Assembler\AssemblerInterface;
+use Phpro\SoapClient\CodeGenerator\Assembler\PropertyAssembler;
+use Phpro\SoapClient\CodeGenerator\Assembler\PropertyAssemblerOptions;
+use Phpro\SoapClient\CodeGenerator\Assembler\PropertyDefaultsAssembler;
+use Phpro\SoapClient\CodeGenerator\Context\PropertyContext;
+use Phpro\SoapClient\CodeGenerator\Model\Property;
+use Phpro\SoapClient\CodeGenerator\Model\Type;
+use PHPUnit\Framework\TestCase;
+use Laminas\Code\Generator\ClassGenerator;
+use Soap\Engine\Metadata\Model\Property as EngineProperty;
+use Soap\Engine\Metadata\Model\Property as MetaProperty;
+use Soap\Engine\Metadata\Model\TypeMeta;
+use Soap\Engine\Metadata\Model\XsdType;
+
+class PropertyDefaultsAssemblerTest extends TestCase
+{
+    /**
+     * @test
+     */
+    function it_is_an_assembler()
+    {
+        $assembler = new PropertyDefaultsAssembler();
+        $this->assertInstanceOf(AssemblerInterface::class, $assembler);
+    }
+
+    /**
+     * @test
+     * @dataProvider provideAssemblerContexts
+     */
+    function it_can_enhance_assembled_property_with_a_default_value(
+        PropertyContext $context,
+        string $expectedCode,
+        bool $skipPropertyGeneration = false,
+    ): void {
+        if (!$skipPropertyGeneration) {
+            (new PropertyAssembler(PropertyAssemblerOptions::create()->withDocBlocks(false)))->assemble($context);
+        }
+        (new PropertyDefaultsAssembler())->assemble($context);
+
+        $code = $context->getClass()->generate();
+        $this->assertEquals($expectedCode, $code);
+    }
+
+    public static function provideAssemblerContexts(): iterable
+    {
+        $expectedOutput = <<<EOCODE
+namespace MyNamespace;
+
+class MyType
+{
+    %s
+}
+
+EOCODE;
+
+        yield 'mixed' => [
+            self::createContext(self::configureProperty(XsdType::create('mixed'))),
+            sprintf($expectedOutput, 'private mixed $prop1 = null;')
+        ];
+        yield 'string' => [
+            self::createContext(self::configureProperty(XsdType::create('string'))),
+            sprintf($expectedOutput, 'private string $prop1 = \'\';')
+        ];
+        yield 'int' => [
+            self::createContext(self::configureProperty(XsdType::create('int'))),
+            sprintf($expectedOutput, 'private int $prop1 = 0;')
+        ];
+        yield 'bool' => [
+            self::createContext(self::configureProperty(XsdType::create('bool'))),
+            sprintf($expectedOutput, 'private bool $prop1 = false;')
+        ];
+        yield 'float' => [
+            self::createContext(self::configureProperty(XsdType::create('float'))),
+            sprintf($expectedOutput, 'private float $prop1 = 0;')
+        ];
+        yield 'nullable-type' => [
+            self::createContext(self::configureProperty(XsdType::create('SomeClass')->withMeta(
+                static fn(TypeMeta $meta): TypeMeta => $meta->withIsNullable(true)
+            ))),
+            sprintf($expectedOutput, 'private ?\ns1\SomeClass $prop1 = null;')
+        ];
+        yield 'non-nullable-type' => [
+            self::createContext(self::configureProperty(XsdType::create('SomeClass'))),
+            sprintf($expectedOutput, 'private \ns1\SomeClass $prop1;')
+        ];
+        yield 'without-known-property' => [
+            self::createContext(self::configureProperty(XsdType::create('SomeClass'))),
+            <<<EOCODE
+namespace MyNamespace;
+
+class MyType
+{
+}
+
+EOCODE,
+            true
+        ];
+    }
+
+    private static function configureProperty(XsdType $type): Property
+    {
+        return Property::fromMetaData('ns1', new MetaProperty('prop1', $type));
+    }
+
+    private static function createContext(Property $property): PropertyContext
+    {
+        $class = new ClassGenerator('MyType', 'MyNamespace');
+        $type = new Type('MyNamespace', 'MyType', 'MyType', [
+            $property
+        ], XsdType::create('MyType'));
+
+        return new PropertyContext($class, $type, $property);
+    }
+}