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service-layer

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Defines application service structure and business orchestration boundaries

License unclear

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Service Layer

Services are the only place business logic lives. They are framework-agnostic.

1. Responsibility

Services MUST:

  • contain business logic
  • coordinate models
  • enforce domain rules
  • return models or DTOs

Services MUST NOT:

  • accept or return HTTP request/response objects
  • contain UI logic
  • use app() or resolve() internally

2. Dependency Rule

Constructor injection only:

public function __construct(
    private InvoiceRepository $repository
) {}

3. DTO Rule

DTOs are not required when the source is a validated FormRequest::validated() array. Arrays are fine there.

Use DTOs when:

  • crossing system boundaries (API, queues, external integrations)
  • multiple services share a contract
  • the payload must be stable across refactors

Skip DTOs when:

  • input comes from a single controller action's validated request
  • the data is short-lived and not reused

4. Standard Shape

app/Services/{Domain}/{Model}Service.php

e.g. app/Services/Task/TaskService.php, app/Services/Offer/OfferService.php.

Standard method names: create, update, delete, findByExternalId. Prefer one service class per domain holding both create/update (see TaskService) over splitting into separate per-action service classes.