Antidot\EventSource\Domain\Event\DomainEventEmitter

Complexity

Total Complexity

6

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Test Coverage

Coverage

0%

Importance

Changes	1
Bugs	0	Features	0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	emit()	0	7	1
A	assertInstance()	0	7	2
A	resetEvents()	0	4	1
A	recordThat()	0	4	1

<?php

declare(strict_types=1);

namespace Antidot\EventSource\Domain\Event;

use Generator;

class DomainEventEmitter
{
    private static ?self $instance = null;
    private EventCollection $events;

    private function __construct()
    {
        $this->resetEvents();
    }

    private function resetEvents(): void
    {
        /** @var EventCollection events */
        $this->events = EventCollection::createEmptyCollection();
    }

    public static function recordThat(AggregateChanged $event): void
    {
        $self = self::assertInstance();
        $self->events->addItem($event);
    }

    public static function emit(): Generator
    {
        $self = self::assertInstance();
        $events = $self->events;
        $self->resetEvents();

        yield from $events;
    }

    private static function assertInstance(): self
    {
        if (null === static::$instance) {

Since $instance is declared private, accessing it with static will lead to errors in possible sub-classes; you can either use self, or increase the visibility of $instance to at least protected.

            static::$instance = new self;
        }

        return static::$instance;
    }
}