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dominikzoggdominikzogg
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object-constructor-schema
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‎src/Schema/ObjectConstructorSchema.php‎

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<?php
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declare(strict_types=1);
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namespace Chubbyphp\Parsing\Schema;
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use Chubbyphp\Parsing\Error;
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use Chubbyphp\Parsing\Errors;
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use Chubbyphp\Parsing\ErrorsException;
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final class ObjectConstructorSchema extends AbstractObjectSchema implements ObjectSchemaInterface
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{
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public const string ERROR_TYPE_CODE = 'object.type';
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public const string ERROR_UNKNOWN_FIELD_CODE = 'object.unknownField';
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public const string ERROR_PARAMETER_TYPE_CODE = 'object.parameterType';
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public const string ERROR_PARAMETER_TYPE_TEMPLATE = 'Parameter {{index}} {{name}} should be of {{type}}, {{given}} given';
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private const string TYPE_ERROR_PATTERN = '/%s::__construct\(\): Argument #(\d+) \(([^)]+)\) must be of type ([^ ]+), ([^ ]+) given/';
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/**
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* @param array<mixed, mixed> $fieldToSchema
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* @param class-string $classname
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*/
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public function __construct(array $fieldToSchema, private string $classname)
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{
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try {
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$reflectionClass = new \ReflectionClass($this->classname);
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} catch (\ReflectionException) {
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throw new \InvalidArgumentException('Class "'.$classname.'" does not exist or cannot be used for reflection');
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}
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try {
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$constructorReflectionMethod = $reflectionClass->getMethod('__construct');
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} catch (\ReflectionException) {
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throw new \InvalidArgumentException('Class "'.$classname.'" does have a __construct method');
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}
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$parameterFieldToSchema = [];
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/** @var list<string> $missingFieldToSchema */
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$missingFieldToSchema = [];
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foreach ($constructorReflectionMethod->getParameters() as $parameterReflection) {
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$name = $parameterReflection->getName();
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if (isset($fieldToSchema[$name])) {
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$parameterFieldToSchema[$name] = $fieldToSchema[$name];
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unset($fieldToSchema[$name]);
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} else {
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if (!$parameterReflection->isOptional()) {
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$missingFieldToSchema[] = $name;
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}
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}
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}
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if ([] !== $missingFieldToSchema) {
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throw new \InvalidArgumentException('Missing fieldToSchema for "'.$classname.'" __construct parameters: "'.implode('", ', $missingFieldToSchema).'"');
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}
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if ([] !== $fieldToSchema) {
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throw new \InvalidArgumentException('Additional fieldToSchema for "'.$classname.'" __construct parameters: "'.implode('", ', array_keys($fieldToSchema)).'"');
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}
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parent::__construct($parameterFieldToSchema);
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}
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/**
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* @param array<string, mixed> $input
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*/
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protected function parseFields(array $input, Errors $childrenErrors): ?object
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{
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$parameters = [];
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foreach ($this->getFieldToSchema() as $fieldName => $fieldSchema) {
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try {
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if ($this->skip($input, $fieldName)) {
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continue;
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}
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$parameters[$fieldName] = $fieldSchema->parse($input[$fieldName] ?? null);
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} catch (ErrorsException $e) {
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$childrenErrors->add($e->errors, $fieldName);
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}
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}
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try {
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return new ($this->classname)(...$parameters);
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} catch (\TypeError $e) {
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$pattern = \sprintf(self::TYPE_ERROR_PATTERN, preg_quote($this->classname));
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$matches = [];
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if (1 === preg_match($pattern, $e->getMessage(), $matches)) {
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throw new ErrorsException(
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new Error(
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self::ERROR_PARAMETER_TYPE_CODE,
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self::ERROR_PARAMETER_TYPE_TEMPLATE,
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['index' => $matches[1], 'name' => $matches[2], 'type' => $matches[3], 'given' => $matches[4]]
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)
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);
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}
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throw $e;
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}
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}
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}

‎tests/Unit/Schema/ObjectConstructorSchemaTest.php‎

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<?php
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declare(strict_types=1);
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namespace Chubbyphp\Tests\Parsing\Unit\Schema;
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use Chubbyphp\Parsing\ErrorsException;
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use Chubbyphp\Parsing\Schema\FloatSchema;
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use Chubbyphp\Parsing\Schema\IntSchema;
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use Chubbyphp\Parsing\Schema\ObjectConstructorSchema;
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use Chubbyphp\Parsing\Schema\StringSchema;
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use PHPUnit\Framework\TestCase;
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final class ObjectConstructorDemo implements \JsonSerializable
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{
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public function __construct(
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public readonly string $field1,
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public readonly int $field2,
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public readonly ?float $field3 = null,
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) {}
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public function jsonSerialize(): array
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{
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return [
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'field1' => $this->field1,
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'field2' => $this->field2,
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'field3' => $this->field3,
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];
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}
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}
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final class ObjectConstructorThrowingTypeErrorDemo
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{
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public function __construct(
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public readonly string $field1,
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) {
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throw new \TypeError('some unrelated type error');
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}
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}
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/**
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* @covers \Chubbyphp\Parsing\Schema\ObjectConstructorSchema
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*
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* @internal
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*/
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final class ObjectConstructorSchemaTest extends TestCase
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{
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public function testImmutability(): void
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{
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$schema = new ObjectConstructorSchema(['field1' => new StringSchema(), 'field2' => new IntSchema(), 'field3' => new FloatSchema()], ObjectConstructorDemo::class);
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self::assertNotSame($schema, $schema->nullable());
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self::assertNotSame($schema, $schema->nullable(false));
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self::assertNotSame($schema, $schema->default([]));
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self::assertNotSame($schema, $schema->preParse(static fn (mixed $input) => $input));
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self::assertNotSame($schema, $schema->postParse(static fn (\stdClass $output) => $output));
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self::assertNotSame($schema, $schema->catch(static fn (\stdClass $output, ErrorsException $e) => $output));
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self::assertNotSame($schema, $schema->strict());
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self::assertNotSame($schema, $schema->optional([]));
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}
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public function testConstructWithClassname(): void
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{
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try {
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new ObjectConstructorSchema([], 'UnknownClass');
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throw new \Exception('code should not be reached');
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} catch (\InvalidArgumentException $invalidArgumentException) {
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self::assertSame(
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'Class "UnknownClass" does not exist or cannot be used for reflection',
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$invalidArgumentException->getMessage()
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);
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}
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}
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public function testConstructWithClassNotHavingAConstructor(): void
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{
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try {
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new ObjectConstructorSchema([], \stdClass::class);
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throw new \Exception('code should not be reached');
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} catch (\InvalidArgumentException $invalidArgumentException) {
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self::assertSame(
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'Class "'.\stdClass::class.'" does have a __construct method',
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$invalidArgumentException->getMessage()
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);
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}
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}
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public function testConstructWithMissingFieldSchema(): void
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{
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try {
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new ObjectConstructorSchema([], ObjectConstructorDemo::class);
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throw new \Exception('code should not be reached');
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} catch (\InvalidArgumentException $invalidArgumentException) {
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self::assertSame(
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'Missing fieldToSchema for "'.ObjectConstructorDemo::class.'" __construct parameters: "field1", field2"',
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$invalidArgumentException->getMessage()
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);
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}
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}
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public function testConstructWithAdditionalFieldSchema(): void
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{
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try {
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new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new FloatSchema(),
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'field4' => new FloatSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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throw new \Exception('code should not be reached');
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} catch (\InvalidArgumentException $invalidArgumentException) {
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self::assertSame(
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'Additional fieldToSchema for "'.ObjectConstructorDemo::class.'" __construct parameters: "field4"',
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$invalidArgumentException->getMessage()
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);
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}
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}
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public function testSuccessWithAllParameters(): void
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{
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$input = ['field1' => 'test', 'field2' => 5, 'field3' => 3.14159];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new FloatSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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/** @var ObjectConstructorDemo $object */
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$object = $schema->parse($input);
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self::assertInstanceOf(ObjectConstructorDemo::class, $object);
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self::assertSame($input, $object->jsonSerialize());
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}
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public function testSuccessWithAllParametersOptionalConsidered(): void
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{
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$input = ['field1' => 'test', 'field2' => 5];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new FloatSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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/** @var ObjectConstructorDemo $object */
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$object = $schema->parse($input);
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self::assertInstanceOf(ObjectConstructorDemo::class, $object);
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self::assertSame([...$input, 'field3' => null], $object->jsonSerialize());
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}
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public function testSuccessWithRequiredParameters(): void
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{
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$input = ['field1' => 'test', 'field2' => 5];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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/** @var ObjectConstructorDemo $object */
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$object = $schema->parse($input);
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self::assertInstanceOf(ObjectConstructorDemo::class, $object);
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self::assertSame([...$input, 'field3' => null], $object->jsonSerialize());
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}
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public function testFailedWithInvalidValue(): void
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{
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$input = ['field1' => 'test', 'field2' => 5, 'field3' => 'test'];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new FloatSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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try {
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$schema->parse($input);
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throw new \Exception('code should not be reached');
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} catch (ErrorsException $errorsException) {
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self::assertSame([
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[
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'path' => 'field3',
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'error' => [
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'code' => 'float.type',
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'template' => 'Type should be "float", {{given}} given',
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'variables' => [
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'given' => 'string',
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],
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],
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],
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], $errorsException->errors->jsonSerialize());
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}
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}
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public function testFailedWithInvalidValueNotCatchedByFieldSchema(): void
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{
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$input = ['field1' => 'test', 'field2' => 5, 'field3' => 'test'];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new StringSchema(),
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], ObjectConstructorDemo::class)->optional(['field3']);
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try {
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$schema->parse($input);
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throw new \Exception('code should not be reached');
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} catch (ErrorsException $errorsException) {
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self::assertSame([
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[
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'path' => '',
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'error' => [
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'code' => 'object.parameterType',
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'template' => 'Parameter {{index}} {{name}} should be of {{type}}, {{given}} given',
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'variables' => [
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'index' => '3',
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'name' => '$field3',
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'type' => '?float',
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'given' => 'string',
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],
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],
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],
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], $errorsException->errors->jsonSerialize());
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}
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}
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public function testFailedWithUnknownException(): void
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{
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$exception = new \Exception('unknown');
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$input = ['field1' => 'test', 'field2' => 5, 'field3' => 3.14159];
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$schema = new ObjectConstructorSchema([
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'field1' => new StringSchema(),
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'field2' => new IntSchema(),
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'field3' => new FloatSchema()->postParse(static fn () => throw $exception),
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], ObjectConstructorDemo::class)->optional(['field3']);
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try {
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$schema->parse($input);
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throw new \Exception('code should not be reached');
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} catch (\Exception $e) {
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self::assertSame($exception, $e);
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}
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}
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public function testFailedWithTypeErrorNotMatchingPattern(): void
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{
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$input = ['field1' => 'test'];
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$schema = new ObjectConstructorSchema([
266+
'field1' => new StringSchema(),
267+
], ObjectConstructorThrowingTypeErrorDemo::class);
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try {
270+
$schema->parse($input);
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throw new \Exception('code should not be reached');
273+
} catch (\TypeError $e) {
274+
self::assertSame('some unrelated type error', $e->getMessage());
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}
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}
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}

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