medium.dry.example.2.php

<?php

class ProduceDocumentHandler
{
  private $accountFinder;
  private $pdfGenerator;
  
  public function __construct(
    AccountFinder $accountFinder,
    PdfGenerator $pdfGenerator
  ) {
    $this->accountFinder = $accountFinder;
    $this->pdfGenerator = $pdfGenerator;
  }
  
  public function handle(Command $command, string $templateName): void
  {
    $account = $this->accountFinder->byId($command->accountId());
    $accountTotal = 0;
    foreach ($account->items as $item) {
      $accountTotal += $item->total();
    }
    $this->pdfGenerator->generate($templateName, $account, $accountTotal);
  }
}

final class ProduceAccountStatementHandler extends ProduceDocumentHandler
{
  public function handle(Command $command): void
  {
    parent::handle($command, 'account-statement.template');
  }
}

final class ProducePaymentOverdueNoticeHandler extends ProduceDocumentHandler
{
  public function handle(Command $command): void
  {
    parent::handle($command, 'payment-overdue-notice.template');
  }
}