FileItem.php

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<?php

namespace ILIAS\LTI\ToolProvider\Content;

class FileItem extends Item
{
    private ?bool $copyAdvice = null;

    private ?int $expiresAt = null;

    public function __construct($placementAdvices = null, ?string $id = null)
    {
        parent::__construct(Item::TYPE_FILE, $placementAdvices, $id);
    }

    public function setCopyAdvice(?bool $copyAdvice)
    {
        $this->copyAdvice = $copyAdvice;
    }

    public function setExpiresAt(?int $expiresAt)
    {
        $this->expiresAt = $expiresAt;
    }

    public function toJsonldObject(): object
    {
        $item = parent::toJsonldObject();
        if (!is_null($this->copyAdvice)) {
            $item->copyAdvice = $this->copyAdvice;
        }
        if (!empty($this->expiresAt)) {
            $item->expiresAt = gmdate('Y-m-d\TH:i:s\Z', $this->expiresAt);
        }

        return $item;
    }

    public function toJsonObject(): object
    {
        $item = parent::toJsonObject();
        if (!empty($this->expiresAt)) {
            $item->expiresAt = gmdate('Y-m-d\TH:i:s\Z', $this->expiresAt);
        }

        return $item;
    }

    protected function fromJsonObject(object $item)
    {
        parent::fromJsonObject($item);
        foreach (get_object_vars($item) as $name => $value) {
            switch ($name) {
                case 'copyAdvice':
                case 'expiresAt':
                    $this->{$name} = $item->{$name};
                    break;
            }
        }
    }
}