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() {
        return _elgg_services()->temp_filestore;
    }

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

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

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

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

}