fileinpututility.php

См. документацию.

<?php
namespace Bitrix\Main\UI;
 
use Bitrix\Main\Application;
use Bitrix\Main\Context;
 
class FileInputUtility
{
    protected static $instance = null;
 
    const SESSION_VAR_PREFIX = "MFI_UPLOADED_FILES_";
    const SESSION_LIST = "MFI_SESSIONS";
    const SESSION_TTL = 86400;

    public static function instance()
    {
        if (!isset(static::$instance))
            static::$instance = new static();
 
        return static::$instance;
    }
 
    public function __construct()
    {
    }
 
    public function isAccessible(): bool
    {
        return Application::getInstance()->getSession()->isAccessible();
    }
 
    public function registerControl($CID, $controlId = "")
    {
        if (func_num_args() == 1)
        {
            $controlId = $CID;
            $CID = "";
        }
        $CID = (!empty($CID) ? $CID : md5(randString(15)));
        $this->initSession($CID, $controlId);
        return $CID;
    }
 
    public function registerFile($CID, $fileId)
    {
        Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID][] = $fileId;
    }
 
    public function unRegisterFile($CID, $fileId)
    {
        if (isset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]))
        {
            $key = array_search($fileId, Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]);
            if($key !== false)
            {
                unset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID][$key]);
                return true;
            }
        }
        return false;
    }
 
    public function checkFiles($controlId, $arFiles)
    {
        $arSessionFilesList = $this->getSessionControlFiles($controlId);
 
        if(is_array($arFiles))
        {
            foreach($arFiles as $key => $fileId)
            {
                if(!in_array($fileId, $arSessionFilesList))
                {
                    unset($arFiles[$key]);
                }
            }
 
            $arFiles = array_values($arFiles);
        }
 
        return $arFiles;
    }
 
    public function checkDeletedFiles($controlId)
    {
        $arSessionFilesList = $this->getSessionControlFiles($controlId);
        $deletedRequestName = $controlId.'_deleted';
 
        $result = array();
 
        $request = Context::getCurrent()->getRequest();
        $requestValues = $request->getValues();
 
        // HACK for correct use file delete from BX.UI.ComponentAjax.doSubmit
        if (isset($requestValues['data']) && is_array($requestValues['data']))
        {
            $requestValues = $requestValues['data'];
        }
 
        if(isset($requestValues[$deletedRequestName]) && is_array($requestValues[$deletedRequestName]))
        {
            foreach($requestValues[$deletedRequestName] as $deletedFile)
            {
                if(
                    in_array($deletedFile, $arSessionFilesList)
                    && \CFile::SaveFile(array(
                        'old_file' => $deletedFile,
                        'del' => 'Y',
                    ), ''))
                {
                    $result[] = $deletedFile;
                }
            }
        }
 
        return $result;
    }
 
    public function checkFile($CID, $fileId)
    {
        return isset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID])
            && in_array($fileId, Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]);
    }
 
    public function getControlByCid($CID)
    {
        $ts = time();
        $found = null;
        foreach (Application::getInstance()->getSession()[self::SESSION_LIST] as $controlId => $d)
        {
            if (array_key_exists($CID, $d))
            {
                $r = $d[$CID];
                if($r["SESSID"] != bitrix_sessid()
                    || $ts-$r["TS"] > self::SESSION_TTL)
                {
                    unset(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId][$CID]);
                    unset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]);
                }
                else
                {
                    $found = $controlId;
                    break;
                }
            }
        }
        return $found;
    }
    public function isCidRegistered($CID)
    {
        return !is_null($this->getControlByCid($CID));
    }
 
    public function getUserFieldCid(array $userField)
    {
        $fieldName = $userField['MULTIPLE'] === 'Y' ? preg_replace("/\[.*\]$/", '', $userField['FIELD_NAME']) : $userField['FIELD_NAME'];
        return $userField["ENTITY_ID"]."-".$userField["ID"]."-".$fieldName;
    }
 
    protected function initSession($CID, $controlId)
    {
        $ts = time();
 
        if(!isset(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId]))
        {
            Application::getInstance()->getSession()[self::SESSION_LIST][$controlId] = array();
        }
        else
        {
            foreach(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId] as $key => $arSession)
            {
                if($arSession["SESSID"] != bitrix_sessid()
                    || $ts-$arSession["TS"] > self::SESSION_TTL)
                {
                    unset(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId][$key]);
                    unset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$key]);
                }
            }
        }
        if (!array_key_exists($CID, Application::getInstance()->getSession()[self::SESSION_LIST][$controlId]))
        {
            Application::getInstance()->getSession()[self::SESSION_LIST][$controlId][$CID] = array(
                "TS" => $ts,
                "SESSID" => bitrix_sessid()
            );
            Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID] = array();
        }
    }
 
    protected function getSessionControlFiles($controlId)
    {
        $res = array();
 
        if(isset(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId]))
        {
            foreach(Application::getInstance()->getSession()[self::SESSION_LIST][$controlId] as $CID => $arSession)
            {
                if(isset(Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]) && is_array(
                        Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]))
                {
                    $res = array_merge($res, Application::getInstance()->getSession()[self::SESSION_VAR_PREFIX.$CID]);
                }
            }
        }
 
        return $res;
    }
}