Domain

The domain component incorporates components that are used for the implementation of the Action Domain Responder (ADR) pattern and can also be used when implementing Domain Driven Design.

Payload

The Action Domain Responder requires a data transfer mechanism between the three layers to serve your application. The Phalcon\Domain\Payload is a data transfer object that is used to send data between the three layers of the pattern.

<?php

use Phalcon\Domain\Payload;

$payload = new Payload();

When using this object, you can set its status, the input, the output, any messages or extra information required by each layer of your pattern to be transferred to the next layer that requires it during the application flow. The class itself is a data wrapper that contains the necessary information to be passed between layers.

The properties stored are:

extras: Extra information
input: Input
messages: Messages
status: Status
output: Output

The component offers getters and setters for the above properties.

NOTE: All the setters return back a Phalcon\Domain\Payload object, which allows you to chain calls for a more fluent syntax.

Factory

Phalcon\Domain\PayloadFactory is also available, offering an easy way to generate new Payload objects.

<?php
use Phalcon\Domain\PayloadFactory;

$payloadFactory = new PayloadFactory();
$payload = $payloadFactory->newInstance();
?>

Interfaces

There are three interfaces that you can take advantage of if you wish to extend the object.

ReadableInterface: contains only read methods
WritableInterface: contains only write methods
PayloadInterface: contains both read and write methods

Status Values

The Phalcon\Domain\Payload\Status class contains several constants to help with the domain status of your Payload objects. You can always extend the class and introduce your own domain statuses, depending on the needs of your application.

ACCEPTED
AUTHENTICATED
AUTHORIZED
CREATED
DELETED
ERROR
FAILURE
FOUND
NOT_ACCEPTED
NOT_AUTHENTICATED
NOT_AUTHORIZED
NOT_CREATED
NOT_DELETED
NOT_FOUND
NOT_UPDATED
NOT_VALID
PROCESSING
SUCCESS
UPDATED
VALID

These statuses can be used at the display/view layer of your application to process domain objects retrieved via Payload::getOutput().

Ejemplo

<?php

use Application\Models\Reports;
use Phalcon\Domain\PayloadFactory;
use Phalcon\Domain\Payload\Status;
use Phalcon\Mvc\Controller;

class ReportsController extends Controller
{
    public function viewAction(int $reportId)
    {
        $factory = new PayloadFactory();
        $payload = $factory->newInstance();

        $report = Reports::find(
            [
                'conditions' => 'reportId = :reportId:',
                'bind'       => [
                    'reportId' => $reportId,
                 ],
            ]          
        );

        if (false === $report) {
            $payload
                ->setStatus(Status::NOT_FOUND)
                ->setInput(func_get_args())
            ;
        } else {
            $payload
                ->setStatus(Status::FOUND)
                ->setOutput($report)
            ;
        }

        return $payload;
    }
}   