CatalogService.kt

@Service
class CatalogService(private val catalogClient: CatalogClient) {
    suspend fun getAll(merchantCode: String): List<CategoryResponse> = catalogClient.getCategories(
        merchantCode,
        getSumupHeaders(),
    )
        .call()
        .map { categoryResponse -> CategoryResponseFactory.create(categoryResponse) }
}

class CategoryResponseFactory {
    companion object {
        fun create(
            categoryResponse: CategoryResponse,
        ) = CategoryResponse(
            categoryId = categoryResponse.id,
            name = categoryResponse.name,
        )
    }
}