<?php
declare(strict_types=1);
namespace PhpMyAdmin\Import;
use PhpMyAdmin\Core;
use function function_exists;
use function ini_get;
use function json_encode;
use function ucwords;
use function uniqid;
/**
* Handles plugins that show the upload progress.
*/
final class Ajax
{
/**
* Sets up some variables for upload progress
*/
public static function uploadProgressSetup(): array
{
/**
* constant for differentiating array in $_SESSION variable
*/
$SESSION_KEY = '__upload_status';
/**
* sets default plugin for handling the import process
*/
$_SESSION[$SESSION_KEY]['handler'] = '';
/**
* unique ID for each upload
*/
$upload_id = uniqid('');
/**
* list of available plugins
*/
$plugins = [
// in PHP 5.4 session-based upload progress was problematic, see closed bug 3964
//"session",
'progress',
'noplugin',
];
// select available plugin
foreach ($plugins as $plugin) {
$check = $plugin . 'Check';
if (self::$check()) {
$upload_class = 'PhpMyAdmin\Plugins\Import\Upload\Upload' . ucwords($plugin);
$_SESSION[$SESSION_KEY]['handler'] = $upload_class;
break;
}
}
return [
$SESSION_KEY,
$upload_id,
$plugins,
];
}
/**
* Checks if PhpMyAdmin\Plugins\Import\Upload\UploadProgress bar extension is
* available.
*/
public static function progressCheck(): bool
{
return function_exists('uploadprogress_get_info');
}
/**
* Checks if PHP 5.4 session upload-progress feature is available.
*/
public static function sessionCheck(): bool
{
return ini_get('session.upload_progress.enabled') === '1';
}
/**
* Default plugin for handling import.
* If no other plugin is available, noplugin is used.
*
* @return true
*/
public static function nopluginCheck(): bool
{
return true;
}
/**
* The function outputs json encoded status of uploaded.
* It uses PMA_getUploadStatus, which is defined in plugin's file.
*
* @param string $id ID of transfer, usually $upload_id
*/
public static function status($id): void
{
Core::headerJSON();
echo json_encode(
$_SESSION[$GLOBALS['SESSION_KEY']]['handler']::getUploadStatus($id)
);
}
}