DownloadAction.php

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<?php
 
namespace Elgg\Controllers;
 
use Elgg\Http\DownloadResponse;
 
abstract class DownloadAction extends GenericAction {
    
    abstract protected function getFilename(): string;
 
    abstract protected function getContents(): mixed;
 
    protected function getMimeType(): string {
        return 'application/octet-stream';
    }
 
    protected function getHeaders(): array {
        return [
            'Content-Type' => $this->getMimeType() . '; charset=utf-8',
        ];
    }
    
    protected function success(): DownloadResponse {
        return elgg_download_response((string) $this->getContents(), $this->getFilename(), false, $this->getHeaders());
    }
}