RevisionCollection.php

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<?php declare(strict_types=1);

namespace ILIAS\MainMenu\Storage\Revision;

use ILIAS\MainMenu\Storage\Identification\ResourceIdentification;
use LogicException;

class RevisionCollection
{

    private $revisions = [];
    private $identification;


    public function __construct(ResourceIdentification $identification, array $revisions = [])
    {
        $this->identification = $identification;
        $this->revisions = $revisions;
    }


    public function add(Revision $revision) : void
    {
        if ($this->identification->serialize() !== $revision->getIdentification()->serialize()) {
            throw new LogicException("Can't add Revision sice it'ss not the same ResourceIdentification");
        }
        foreach ($this->revisions as $r) {
            if ($r->getVersionNumber() === $revision->getVersionNumber()) {
                throw new LogicException(sprintf("Can't add already existing version number: %s", $revision->getVersionNumber()));
            }
        }
        $this->revisions[$revision->getVersionNumber()] = $revision;
        sort($this->revisions);
    }


    public function remove(Revision $revision) : void
    {
        foreach ($this->revisions as $k => $revision_e) {
            if ($revision->getVersionNumber() === $revision_e->getVersionNumber()) {
                $revision_e->setUnavailable();

                return;
            }
        }
    }


    public function replace(Revision $revision) : void
    {
        foreach ($this->revisions as $k => $revision_e) {
            $revision_e->setUnavailable();
        }
        $this->add($revision);
    }


    public function getCurrent() : Revision
    {
        $current = end($this->revisions);
        if (!$current instanceof Revision) {
            $current = new NullRevision($this->identification);
        }

        return $current;
    }


    public function getAll() : array
    {
        return $this->revisions;
    }
}