Domain\Snapshotting\TimeBased

Complexity

Total Complexity

4

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Importance

Changes	2
Bugs	1	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	shouldCreateSnapshot()	0	13	3

<?php

namespace Domain\Snapshotting;

use Domain\Aggregates\AggregateRoot;
use Domain\Snapshotting\SnapshottingPolicy;
use Domain\Snapshotting\SnapshotStore;

/**
 * @author Sebastiaan Hilbers <bas.hilbers@gmail.com>
 */
class TimeBased implements SnapshottingPolicy
{
    /**
     * @var SnapshotStore
     */
    private $store;

    /**
     * @var string
     */
    private $threshold;

    public function __construct(SnapshotStore $store, $threshold = '1 hour')
    {
        $this->store = $store;
        $this->threshold = $threshold;
    }

    /**
     * Should a snapshot be created?
     *
     * @param AggregateRoot $root
     * @return bool
     */
    public function shouldCreateSnapshot(AggregateRoot $root)
    {
        if ($root->hasChanges()) {
            $lastSnapshot = $this->store->get($root->getIdentity());
            $threshold = new \DateTime(date('c', strtotime('-' . $this->threshold)));

            if ($lastSnapshot->getCreationDate() > $threshold) {
                return true;
            }
        }

        return false;
    }
}