ElggTempFile.php

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<?php

use Elgg\Exceptions\Filesystem\IOException;

class ElggTempFile extends ElggFile {

    protected function initializeAttributes() {
        parent::initializeAttributes();

        $this->attributes['subtype'] = 'temp_file';
        $this->setFilename(uniqid());
    }

    protected function getFilestore(): \Elgg\Filesystem\Filestore\TempDiskFilestore {
        return _elgg_services()->temp_filestore;
    }

    public function transfer(int $owner_guid, string $filename = null): bool {
        return false;
    }

    public function canDownload(int $user_guid = 0, bool $default = false): bool {
        return false;
    }

    public function getDownloadURL(bool $use_cookie = true, string $expires = '+2 hours'): ?string {
        return '';
    }

    public function getInlineURL(bool $use_cookie = false, string $expires = ''): ?string {
        return '';
    }
    
    public function save(): bool {
        throw new IOException("Temp files can't be saved to the database");
    }
}