PHP code example of digiservnet / data-transfer-object

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

digiservnet / data-transfer-object example snippets

use Digiservnet\DataTransferObject\Attributes\MapFrom;
use Digiservnet\DataTransferObject\DataTransferObject;

class MyDTO extends DataTransferObject
{
    public OtherDTO $otherDTO;
    
    public OtherDTOCollection $collection;
    
    #[CastWith(ComplexObjectCaster::class)]
    public ComplexObject $complexObject;
    
    public ComplexObjectWithCast $complexObjectWithCast;
    
    #[NumberBetween(1, 100)]
    public int $a;
    
    #[MapFrom('address.city')]
    public string $city;
}

$dto = new MyDTO(
    a: 5,
    collection: [
        ['id' => 1],
        ['id' => 2],
        ['id' => 3],
    ],
    complexObject: [
        'name' => 'test',
    ],
    complexObjectWithCast: [
        'name' => 'test',
    ],
    otherDTO: ['id' => 5],
);

$dto = new MyDTO([
    'a' => 5,
    'collection' => [
        ['id' => 1],
        ['id' => 2],
        ['id' => 3],
    ],
    'complexObject' => [
        'name' => 'test',
    ],
    'complexObjectWithCast' => [
        'name' => 'test',
    ],
    'otherDTO' => ['id' => 5],
]);

$dto = new MyDTO(
    collection: [ // This will become an object of class OtherDTOCollection
        ['id' => 1],
        ['id' => 2], // Each item will be an instance of OtherDTO
        ['id' => 3],
    ],
    otherDTO: ['id' => 5], // This data will be cast to OtherDTO
);

class ComplexObject
{
    public string $name;
}

use Digiservnet\DataTransferObject\Caster;

class ComplexObjectCaster implements Caster
{
    /**
     * @param array|mixed $value
     *
     * @return mixed
     */
    public function cast(mixed $value): ComplexObject
    {
        return new ComplexObject(
            name: $value['name']
        );
    }
}

class MyDTO extends DataTransferObject
{
    public ComplexObjectWithCast $complexObjectWithCast;
}

#[CastWith(ComplexObjectWithCastCaster::class)]
class ComplexObjectWithCast
{
    public string $name;
}

#[
    DefaultCast(DateTimeImmutable::class, DateTimeImmutableCaster::class),
    DefaultCast(MyEnum::class, EnumCaster::class),
]
abstract class BaseDataTransferObject extends DataTransferObject
{
    public MyEnum $status; // EnumCaster will be used
    
    public DateTimeImmutable $date; // DateTimeImmutableCaster will be used
}

    /** @var \Digiservnet\DataTransferObject\Tests\Foo[] */
    #[CastWith(ArrayCaster::class, itemType: Foo::class)]
    public array $collectionWithNamedArguments;
    
    /** @var \Digiservnet\DataTransferObject\Tests\Foo[] */
    #[CastWith(ArrayCaster::class, Foo::class)]
    public array $collectionWithoutNamedArguments;

class MyDTO extends DataTransferObject
{
    #[NumberBetween(1, 100)]
    public int $a;
}

#[Attribute(Attribute::TARGET_PROPERTY | Attribute::IS_REPEATABLE)]
class NumberBetween implements Validator
{
    public function __construct(
        private int $min,
        private int $max
    ) {
    }

    public function validate(mixed $value): ValidationResult
    {
        if ($value < $this->min) {
            return ValidationResult::invalid("Value should be greater than or equal to {$this->min}");
        }

        if ($value > $this->max) {
            return ValidationResult::invalid("Value should be less than or equal to {$this->max}");
        }

        return ValidationResult::valid();
    }
}

class PostDTO extends DataTransferObject
{
    #[MapFrom('postTitle')]
    public string $title;
    
    #[MapFrom('user.name')]
    public string $author;
}

$dto = new PostDTO([
    'postTitle' => 'Hello world',
    'user' => [
        'name' => 'John Doe'
    ]
]);

class UserDTO extends DataTransferObject
{

    #[MapFrom(0)]
    public string $firstName;
    
    #[MapFrom(1)]
    public string $lastName;
}

$dto = new UserDTO(['John', 'Doe']);

class UserDTO extends DataTransferObject
{

    #[MapFrom(0)]
    #[MapTo('first_name')]
    public string $firstName;
    
    #[MapFrom(1)]
    #[MapTo('last_name')]
    public string $lastName;
}

$dto = new UserDTO(['John', 'Doe']);
$dto->toArray() // ['first_name' => 'John', 'last_name'=> 'Doe'];
$dto->only('first_name')->toArray() // ['first_name' => 'John'];

class NonStrictDto extends DataTransferObject
{
    public string $name;
}

// This works
new NonStrictDto(
    name: 'name',
    unknown: 'unknown'
);

use \Digiservnet\DataTransferObject\Attributes\Strict;

#[Strict]
class StrictDto extends DataTransferObject
{
    public string $name;
}

// This throws a \Digiservnet\DataTransferObject\Exceptions\UnknownProperties exception
new StrictDto(
    name: 'name',
    unknown: 'unknown'
);

$postData->all();

$postData
    ->only('title', 'body')
    ->toArray();
    
$postData
    ->except('author')
    ->toArray();

$postData
    ->except('title')
    ->except('body')
    ->toArray();

$clone = $original->clone(other: ['name' => 'a']);

class Bar extends DataTransferObject
{
    /** @var \Digiservnet\DataTransferObject\Tests\Foo[] */
    #[CastWith(FooArrayCaster::class)]
    public array $collectionOfFoo;
}

class Foo extends DataTransferObject
{
    public string $name;
}

class FooArrayCaster implements Caster
{
    public function cast(mixed $value): array
    {
        if (! is_array($value)) {
            throw new Exception("Can only cast arrays to Foo");
        }

        return array_map(
            fn (array $data) => new Foo(...$data),
            $value
        );
    }
}

class Bar extends DataTransferObject
{
    #[CastWith(FooCollectionCaster::class)]
    public CollectionOfFoo $collectionOfFoo;
}

class Foo extends DataTransferObject
{
    public string $name;
}

use Illuminate\Support\Collection;

class CollectionOfFoo extends Collection
{
    // Add the correct return type here for static analyzers to know which type of array this is 
    public function offsetGet($key): Foo
    {
        return parent::offsetGet($key);
    }
}

class FooCollectionCaster implements Caster
{
    public function cast(mixed $value): CollectionOfFoo
    {
        return new CollectionOfFoo(array_map(
            fn (array $data) => new Foo(...$data),
            $value
        ));
    }
}

class Bar extends DataTransferObject
{
    /** @var \Digiservnet\DataTransferObject\Tests\Foo[] */
    #[CastWith(ArrayCaster::class, itemType: Foo::class)]
    public array $collectionOfFoo;
}