automapper-issue

issue.php

<?php

$config = new AutoMapperConfig();
$config
    ->registerMapping(OrderDTO::class, Order::class)
    ->forMember('value', Operation::mapFrom(function (OrderDTO $dto) {
        return new Value($dto->currency, $dto->value);
    }))
    ->forMember('items', Operation::mapFromWithMapper(function (OrderDTO $dto, AutoMapper $mapper) {
        $items = [];
        foreach ($dto->items as $item) {
            $items[] = $mapper->map($item, Item::class);
        }

        return $items;
    }))
;
$config
    ->registerMapping(ItemDTO::class, Item::class)
    ->forMember('value', Operation::mapFrom(function (ItemDTO $dto) {
        return new Value(/*OrderDTO::$currency*/, $dto->value);
    }))
;

$mapper = new AutoMapper($config);

$orderDTO = new OrderDTO();
$orderDTO->currency = 'EUR';
$orderDTO->value = 1;

$itemDTO = new ItemDTO();
$itemDTO->value = 1;
$orderDTO->items[] = $itemDTO;

$order = $mapper->map($orderDTO, Order::class);

Item.php

<?php

class Item
{
    /**
     * @var Value
     */
    public $value;

    public function __construct(Value $value)
    {
        $this->value = $value;
    }
}

ItemDTO.php

<?php

class ItemDTO
{
    /**
     * @var float
     */
    public $value;
}

Order.php

<?php

class Order
{
    /**
     * @var Value
     */
    public $value;

    /**
     * @var Item[]
     */
    public $items;
}

OrderDTO.php

<?php

class OrderDTO
{
    /**
     * @var string
     */
    public $currency;

    /**
     * @var float
     */
    public $value;

    /**
     * @var ItemDTO[]
     */
    public $items;
}

solution.php

<?php

$config = new AutoMapperConfig();
$config
    ->registerMapping(OrderDTO::class, Order::class)
    ->forMember('value', Operation::mapFrom(function (OrderDTO $dto) {
        return new Value($dto->currency, $dto->value);
    }))
    ->forMember('items', Operation::mapFromWithMapper(function (OrderDTO $dto, AutoMapper $mapper) {
        $items = [];
        foreach ($dto->items as $item) {
            $items[] = $mapper->map($item, Item::class, [
               'currency' => $dto->currency,
            ]);
        }

        return $items;
    }))
;
$config
    ->registerMapping(ItemDTO::class, Item::class)
    ->forMember('value', Operation::mapFromWithContext(function (ItemDTO $dto, array $context) {
        return new Value($context['currency'] ?? 'EUR', $dto->value);
    }))
;

Value.php

<?php

class Value
{
    /**
     * @var string
     */
    public $currency;

    /**
     * @var float
     */
    public $value;

    public function __construct(string $currency, float $value)
    {
        $this->currency = $currency;
        $this->value = $value;
    }
}