Labrodev Action

Actions, Services, Rules (write side)

Part of the Labrodev playbook. The law for this component lives in the always-on labrodev-action guideline (musts, must-nots); the per-file checklist is rules/actions.md. This skill holds the craft: anatomy, canonical templates, and edge cases.

This skill owns the write side of a domain: Actions (business use cases that mutate state), Services (reusable domain logic), and domain Rules (pure can-I checks). Staged multi-step workflows (Pipelines, Payloads, orchestrating Services) → see the labrodev-pipeline skill.

Where gates run (two levels, one owner each)

1. Policy level — the can-trio. {Model}Rule::canCreate / canUpdate / canRemove are called from the corresponding Policy methods (create(), update(), remove()), so an ineligible request is rejected with 403 before the Action ever runs → see the labrodev-authorization skill. Actions never re-run these checks.

2. Action level — domain invariants the Policy cannot see. Conditions that depend on submitted input or cross-record state at write time (an overlapping period, a plan limit against the requested quantity) are guarded inside the Action, delegated to a {Model}Rule method, and throw a dedicated domain exception on failure:

   if (! BookingRule::periodIsAvailable(bookingData: $bookingData)) {
       throw BookingPeriodUnavailableException::make(bookingData: $bookingData);
   }
   

   Never ValidationException — that class belongs exclusively to the Data validation layer (→ labrodev-data), and a failed business gate is a business failure with its own exception class (→ labrodev-exception). Never a silent early-return no-op either: silent skips hide bugs from callers outside HTTP (pipelines, jobs, console).

Invalid input shape is neither of these — it is handled at the Data validation boundary → see the labrodev-data skill. How a domain exception becomes a user-facing response (toast, JSON error) is the delivery layer's concern via the exception handler — never the Action's.

Placement and naming pattern

Action classes always end in one of the three verbs: {Model}Create, {Model}Update, {Model}Remove — with an aspect infix for partial/state updates (BookingStatusUpdate), never a bespoke verb (BookingConfirm is not a class name; confirmation is a BookingStatusUpdate). One Action = one singular mutation of one model object; anything touching several objects is a Service calling Actions. Rule classes: {Model}Rule; gate methods mirror the operation verb (can{Verb}), invariant checks get descriptive names (periodIsAvailable). Services: -er agent nouns naming the manipulation inside (BookingPriceCalculator, EmailSender, BookingSearcher) — never Manager, Handler, Processor. Callers invoke Actions as callables with named arguments; typed Data parameters mirror the class short name (BookingData $bookingData, never $data) → full rules in the labrodev-naming skill.

Namespaces below use Core\Domain\... as the logical module; the physical root namespace follows the project's Core package → see the labrodev-core skill.

Template: create Action

<?php

declare(strict_types=1);

namespace Core\Domain\Booking\Actions;

use Core\Domain\Booking\Data\BookingData;
use Core\Domain\Booking\Enums\BookingStatus;
use Core\Domain\Booking\Exceptions\BookingPeriodUnavailableException;
use Core\Domain\Booking\Models\Booking;
use Core\Domain\Booking\Rules\BookingRule;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

final readonly class BookingCreate
{
    public function __invoke(BookingData $bookingData): Booking
    {
        if (! BookingRule::periodIsAvailable(bookingData: $bookingData)) {
            throw BookingPeriodUnavailableException::make(bookingData: $bookingData);
        }

        return DB::transaction(function () use ($bookingData): Booking {
            $booking = new Booking();

            $booking->uuid = (string) Str::uuid();

            $booking->reference = $bookingData->reference;
            $booking->starts_at = $bookingData->startsAt;
            $booking->ends_at = $bookingData->endsAt;
            $booking->status = BookingStatus::Draft;

            $booking->save();

            return $booking;
        });
    }
}

Anatomy, in order: invariant guard (Rule condition, named domain exception), then the transaction-wrapped write with the UUID assigned explicitly and every attribute assigned one by one — no mass assignment, no fill(), no create(). The template carries no comments: the no-comments law applies to every class (→ labrodev-core), and the structure is the explanation.

Invocation from a controller: $bookingCreate(bookingData: $bookingData); — wiring and response idioms → see the labrodev-controller skill.

Template: update Action

Eligibility (BookingRule::canUpdate) was already enforced by the Policy — the Action receives an editable model and mutates it. Only input-dependent invariants are re-guarded here.

<?php

declare(strict_types=1);

namespace Core\Domain\Booking\Actions;

use Core\Domain\Booking\Data\BookingData;
use Core\Domain\Booking\Exceptions\BookingPeriodUnavailableException;
use Core\Domain\Booking\Models\Booking;
use Core\Domain\Booking\Rules\BookingRule;

final readonly class BookingUpdate
{
    public function __invoke(
        Booking $booking,
        BookingData $bookingData
    ): Booking {
        if (! BookingRule::periodIsAvailable(bookingData: $bookingData, ignoreBooking: $booking)) {
            throw BookingPeriodUnavailableException::make(bookingData: $bookingData);
        }

        $booking->reference = $bookingData->reference;
        $booking->starts_at = $bookingData->startsAt;
        $booking->ends_at = $bookingData->endsAt;

        $booking->save();

        return $booking;
    }
}

Wrap the body in DB::transaction as soon as the update touches more than one write (e.g. syncing relations).

Template: remove Action

Eligibility (BookingRule::canRemove) is Policy territory; with no input-dependent invariant left, the Action is pure mutation. Whether delete() is a soft or hard delete is the model's concern.

<?php

declare(strict_types=1);

namespace Core\Domain\Booking\Actions;

use Core\Domain\Booking\Models\Booking;

final readonly class BookingRemove
{
    public function __invoke(Booking $booking): void
    {
        $booking->delete();
    }
}

Template: domain Rule

<?php

declare(strict_types=1);

namespace Core\Domain\Booking\Rules;

use Core\Domain\Booking\Data\BookingData;
use Core\Domain\Booking\Enums\BookingStatus;
use Core\Domain\Booking\Models\Booking;
use Core\Domain\Booking\Queries\BookingQuery;

final class BookingRule
{
    public static function canCreate(): bool
    {
        return true;
    }

    public static function canUpdate(Booking $booking): bool
    {
        return $booking->status === BookingStatus::Draft;
    }

    public static function canRemove(Booking $booking): bool
    {
        return $booking->status !== BookingStatus::Confirmed;
    }

    public static function periodIsAvailable(BookingData $bookingData, ?Booking $ignoreBooking = null): bool
    {
        return ! resolve(BookingQuery::class)
            ->overlappingPeriod(startsAt: $bookingData->startsAt, endsAt: $bookingData->endsAt)
            ->when($ignoreBooking !== null, fn ($query) => $query->whereKeyNot($ignoreBooking->getKey()))
            ->exists();
    }
}

canCreate() is the project-specific slot for create-eligibility visible without submitted input (plan limits, account state, feature windows) — the template's return true marks the slot, real projects fill it with a real condition. periodIsAvailable() shows the read discipline: DB conditions route through the model's Query class via resolve(BookingQuery::class) — never inline Booking::query() (→ labrodev-query) — and callers chain further conditions on the returned Builder.

Rules are not request validation (→ see the labrodev-data skill) and not Policies — Policies call the can-trio directly (BookingRule::canRemove($booking)) as the enforcement point → see the labrodev-authorization skill.

Template: Service

<?php

declare(strict_types=1);

namespace Core\Domain\Booking\Services;

use Core\Domain\Booking\Models\Booking;

final class BookingPriceCalculator
{
    public function __invoke(Booking $booking): float
    {
        return $this->nightCount(booking: $booking) * $booking->nightly_rate;
    }

    private function nightCount(Booking $booking): int
    {
        return (int) $booking->starts_at->diffInDays($booking->ends_at);
    }
}

Services may depend on Queries, Collections, Models, Rules, Utilities, and other Services; they may be used inside Actions, Pipeline steps, Jobs, and Listeners. They can be stateless helpers, dependency-injected coordinators, or stateful calculators bound to a model via a make(Model $model): self named constructor.

Batch modifications are Services, not Actions. An Action mutates exactly one model object; when a use case modifies many (bulk archive, sync a collection, re-price every booking of a day), write a Service that iterates and invokes the singular Action per object — the invariants stay enforced in one place and the batch class stays a coordinator.

Staged workflows: the moment a use case grows beyond one atomic mutation — several distinct side-effecting steps (create + mail + log + external CRM) — stage it through Pipelines: a {Workflow}Payload carries flow state, verb-first step classes under Pipelines/{Workflow}/ do one thing each, and a Service in Services/ plays the orchestrator role. Anatomy, templates, and the Domain-vs-Feature placement rule → see the labrodev-pipeline skill.

Edge cases

• Callers outside HTTP (pipeline steps, jobs, console commands) bypass Policies — they consult the same {Model}Rule gates before invoking an Action when eligibility is in question; the Action's own invariant guards still fail loud for them.
• Jobs: a Job is a thin async wrapper that delegates to an Action or Service; if a Job contains logic that matters, move it into an Action/Rule/Service. Queue settings are declared as class attributes (#[OnQueue('notifications')], #[OnConnection('redis')], #[WithoutRelations]) — never as public properties or constructor wiring.
• Notifications: always the chain Event → Listener → queued Job → Notification. The Action dispatches BookingConfirmedEvent; a Listener dispatches SendBookingConfirmationJob; the Job sends the Notification. Never ->notify() inline on the write side.
• Shared-behavior Actions across domains: generic, domain-term-free Actions may live in Core/Shared/Actions; anything named after a domain model stays in that domain.
• Multiple layers need the same mutation: the Action stays in Core and both layers call it — never duplicate write logic per layer.
• Observers may reuse {Model}Rule checks as a persistence-level safety net, but workflows stay in Actions and pipelines → see the labrodev-model skill.
• Datetime values on the write side use Illuminate\Support\Carbon, not CarbonImmutable.
• Legacy code under app/Http, app/Models, app/Actions/Fortify is exempt → see the labrodev-core skill.
• Testing Actions (unit) and routes (feature) → see the labrodev-testing skill.