export.php

См. документацию.

<?php
namespace Bitrix\Main\Controller;
 
use Bitrix\Main;
use Bitrix\Main\Application;
use Bitrix\Main\Error;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\Engine\Response\AjaxJson;
use Bitrix\Main\Security\Sign\Signer;
use Bitrix\Main\Web\Json;
use Bitrix\Main\ArgumentException;
use Bitrix\Main\Security\Sign\BadSignatureException;
 
class Export extends Main\Engine\Controller
{
    protected $module = '';

    const EXPORT_PATH = '/export/';

    const EXPIRE_DAYS = 24;
 
    const ACTION_EXPORT = 'export';
    const ACTION_UPLOAD = 'upload';
    const ACTION_CANCEL = 'cancel';
    const ACTION_FINISH = 'finish';
    const ACTION_DOWNLOAD = 'download';
    const ACTION_CLEAR = 'clear';
    const ACTION_VOID = 'void';
    const ACTION_PURGE = 'purge';
 
    const STATUS_COMPLETED = 'COMPLETED';
    const STATUS_PROGRESS = 'PROGRESS';
 

    protected $componentName = '';

    protected $componentParameters = [];

    protected $exportType;
 
    const EXPORT_TYPE_CSV = 'csv';
    const EXPORT_TYPE_EXCEL = 'excel';

    protected $processToken;

    protected $isNewProcess = true;

    protected $fileName = '';

    protected $filePath = '';

    protected $fileSize = 0;

    protected $fileType = 'application/csv';

    const KEEP_FILE_HOURS = 24;

    protected $processedItems = 0;

    protected $totalItems = 0;

    protected $pageSize = 0;

    const ROWS_PER_PAGE = 100;

    protected $lastExportedId = -1;

    protected $bucket;

    protected $bucketId = -1;

    protected $uploadPath = '';

    protected $uploadedSize = 0;

    protected $uploadedPart = 0;

    protected $cloudMinChunkSize = 5 * 1024 * 1024; // 5M

    protected $fieldToStoreInProcess = array(
        'exportType',
        'fileName',
        'filePath',
        'fileSize',
        'fileType',
        'uploadedSize',
        'uploadPath',
        'uploadedPart',
        'pageSize',
        'processedItems',
        'totalItems',
        'lastExportedId',
        'cloudChunkSize',
        'bucketId',
        'isExportCompleted',
        'isUploadFinished',
        'timeStart',
        'stepCount',
        'useCloud',
    );

    protected $isBitrix24 = false;

    protected $isCloudAvailable = false;

    protected $isExportCompleted = false;

    protected $isUploadFinished = false;

    protected $timeStart = 0;

    protected $stepCount = 0;

    protected $useCloud = null;

    protected $timeLimit = -1;

    protected $hitStartTime = -1;

    protected $timeLimitReached = false;

    const TIME_LIMIT = 20; // 20 seconds

    public function configureActions()
    {
        $configureActions = parent::configureActions();
        $configureActions[self::ACTION_DOWNLOAD] = array(
            '-prefilters' => array(
                Main\Engine\ActionFilter\Csrf::class
            )
        );
 
        return $configureActions;
    }

    protected function init()
    {
        parent::init();
 
        Loc::loadMessages(__FILE__);
 
        $this->isBitrix24 = Main\ModuleManager::isModuleInstalled('bitrix24');
 
        $this->isCloudAvailable =
            Main\ModuleManager::isModuleInstalled('clouds') &&
            Main\Loader::includeModule('clouds');
 
        $this->processToken = $this->request->get('PROCESS_TOKEN');
        $this->exportType = $this->request->get('EXPORT_TYPE');
        $this->componentName = $this->request->get('COMPONENT_NAME');
 
        $signedParameters = $this->request->getPost('signedParameters');
        if (!empty($signedParameters))
        {
            $this->componentParameters = $this->decodeSignedParameters($this->componentName, $signedParameters);
        }
 
        $initialOptions = $this->request->getPost('INITIAL_OPTIONS');
        if (!empty($initialOptions))
        {
            $this->componentParameters['STEXPORT_INITIAL_OPTIONS'] = $initialOptions;
        }
 
        $progressData = $this->getProgressParameters();
        if (!empty($progressData))
        {
            $this->isNewProcess = (empty($progressData['processToken']) || $progressData['processToken'] !== $this->processToken);
            if (!$this->isNewProcess)
            {
                // restore state
                foreach ($this->fieldToStoreInProcess as $fieldName)
                {
                    if (isset($progressData[$fieldName]))
                    {
                        $this->{$fieldName} = $progressData[$fieldName];
                    }
                }
            }
        }
 
        if ($this->isCloudAvailable)
        {
            $bucketList = $this->getBucketList();
            if (empty($bucketList))
            {
                $this->isCloudAvailable = false;
            }
        }
    }
 

    protected function processBeforeAction(Main\Engine\Action $action)
    {
        if (parent::processBeforeAction($action))
        {
            if (!$this->checkCommonErrors($action))
            {
                return false;
            }
        }
 
        return true;
    }

    protected function keepFieldInProcess($fieldName)
    {
        $this->fieldToStoreInProcess[] = $fieldName;
 
        return $this;
    }

    public function dispatcherAction()
    {
        // can we use cloud
        if ($this->isCloudAvailable && $this->useCloud === null)
        {
            if (
                ($this->bucketId < 0) &&
                ($this->totalItems > 0) &&
                ($this->processedItems > 0) &&
                ($this->fileName !== '') &&
                ($this->getSizeTempFile() > 0) &&
                (($this->getSizeTempFile() > $this->cloudMinChunkSize) || $this->isExportCompleted)
            )
            {
                if ($this->isExportCompleted)
                {
                    $predictedFileSize = $this->getSizeTempFile();
                }
                else
                {
                    $predictedFileSize = round($this->getSizeTempFile() * ceil($this->totalItems / $this->processedItems) * 1.5);
                }
                // check cloud bucket rules
                if ($this->findInitBucket(array('fileSize' => $predictedFileSize, 'fileName' => $this->fileName)) === true)
                {
                    // allow
                    $this->useCloud = true;
                }
                else
                {
                    // deny
                    $this->useCloud = false;
                    $this->isCloudAvailable = false;
                }
            }
        }
 
        if ($this->isNewProcess)
        {
            // start export
            $this->stepCount = 0;
            $this->timeStart = time();
            $nextAction = self::ACTION_EXPORT;
        }
        elseif ($this->isBitrix24)
        {
            if ($this->isExportCompleted && !$this->isUploadFinished)
            {
                // upload last chunk
                $nextAction = self::ACTION_UPLOAD;
            }
            elseif ($this->isExportCompleted && $this->isUploadFinished)
            {
                // purge cloud and finish
                $nextAction = self::ACTION_PURGE;
            }
            elseif ($this->getSizeTempFile() > $this->cloudMinChunkSize)
            {
                // upload chunk
                $nextAction = self::ACTION_UPLOAD;
            }
            else
            {
                // continue export into temporally file
                $nextAction = self::ACTION_EXPORT;
            }
        }
        else
        {
            // non b24
            if ($this->isExportCompleted && ($this->useCloud === true) && !$this->isUploadFinished)
            {
                // upload last chunk
                $nextAction = self::ACTION_UPLOAD;
            }
            elseif ($this->isExportCompleted && ($this->useCloud === true) && $this->isUploadFinished)
            {
                // purge cloud and finish
                $nextAction = self::ACTION_PURGE;
            }
            elseif ($this->isExportCompleted && ($this->useCloud === false || $this->useCloud === null))
            {
                // completed
                $nextAction = self::ACTION_FINISH;
            }
            elseif (($this->useCloud === true) && ($this->getSizeTempFile() > $this->cloudMinChunkSize))
            {
                // upload chunk
                $nextAction = self::ACTION_UPLOAD;
            }
            else
            {
                // continue export into temporally file
                $nextAction = self::ACTION_EXPORT;
            }
        }
 
        if ($nextAction === self::ACTION_PURGE)
        {
            return $this->purgeAction();
        }
        if ($nextAction === self::ACTION_EXPORT)
        {
            $this->stepCount ++;
            return $this->exportAction();
        }
        if ($nextAction === self::ACTION_UPLOAD)
        {
            $this->stepCount ++;
            return $this->uploadAction();
        }
        if ($nextAction === self::ACTION_FINISH)
        {
            return $this->finishAction();
        }
 
        return $this->cancelAction();
    }
 

    public function downloadAction()
    {
        if (
            $this->filePath !== '' &&
            $this->fileName !== ''
        )
        {
            $path = new Main\IO\File($this->filePath);
            if ($path->isExists())
            {
 
                $response = new Main\Engine\Response\File(
                    $path->getPath(),
                    $this->fileName,
                    $this->getFileType()
                );
 
                return $response;
            }
        }
 
        $this->addError(new Error('File not found'));
    }
 

    public function exportAction()
    {
        global $APPLICATION;
 
        if ($this->isNewProcess)
        {
            $this->fileType = $this->getFileType();
            $this->fileName = $this->generateExportFileName();
            $this->filePath = $this->generateTempDirPath(). $this->fileName;
            $this->processedItems = 0;
            $this->totalItems = 0;
            $this->pageSize = $this->getRowsPerPage();
            $this->saveProgressParameters();
        }
 
        $this->startTimer(self::TIME_LIMIT);
        do
        {
            $nextPage = (int)floor($this->processedItems / $this->pageSize) + 1;
 
            $componentParameters = array_merge(
                $this->componentParameters,
                array(
                    'STEXPORT_MODE' => 'Y',
                    'EXPORT_TYPE' => $this->exportType,
                    'STEXPORT_PAGE_SIZE' => $this->pageSize,
                    'STEXPORT_TOTAL_ITEMS' => $this->totalItems,
                    'STEXPORT_LAST_EXPORTED_ID' => $this->lastExportedId,
                    'PAGE_NUMBER' => $nextPage,
                )
            );
 
            ob_start();
            $componentResult = $APPLICATION->IncludeComponent(
                $this->componentName,
                '',
                $componentParameters
            );
            $exportData = ob_get_contents();
            ob_end_clean();
 
            $processedItemsOnStep = 0;
 
            if (is_array($componentResult))
            {
                if (isset($componentResult['ERROR']))
                {
                    $this->addError(new Error($componentResult['ERROR']));
                    break;
                }
                else
                {
                    if (isset($componentResult['PROCESSED_ITEMS']))
                    {
                        $processedItemsOnStep = (int)$componentResult['PROCESSED_ITEMS'];
                    }
 
                    // Get total items quantity on 1st step.
                    if ($nextPage === 1 && isset($componentResult['TOTAL_ITEMS']))
                    {
                        $this->totalItems = (int)$componentResult['TOTAL_ITEMS'];
                    }
 
                    if (isset($componentResult['LAST_EXPORTED_ID']))
                    {
                        $this->lastExportedId = (int)$componentResult['LAST_EXPORTED_ID'];
                    }
                }
            }
 
            if ($this->totalItems == 0)
            {
                break;
            }
 
            if ($processedItemsOnStep > 0)
            {
                $this->processedItems += $processedItemsOnStep;
 
                $this->writeTempFile($exportData, ($nextPage === 1));
                unset($exportData);
 
                $this->isExportCompleted = ($this->processedItems >= $this->totalItems);
 
                if ($this->isExportCompleted && !$this->isCloudAvailable)
                {
                    // adjust completed file size
                    $this->fileSize = $this->getSizeTempFile();
                }
            }
            elseif ($processedItemsOnStep == 0)
            {
                // Smth went wrong - terminate process.
                $this->isExportCompleted = true;
 
                if (!$this->isCloudAvailable)
                {
                    $this->fileSize = $this->getSizeTempFile();
                }
            }
 
            if ($this->isExportCompleted === true)
            {
                // finish
                break;
            }
            if ($nextPage === 1)
            {
                // to answer faster
                break;
            }
        }
        while ($this->hasTimeLimitReached() !== true);
 
        if ($this->totalItems == 0)
        {
            $this->isExportCompleted = true;
 
            // Save progress
            $this->saveProgressParameters();
 
            // finish
            $result = $this->preformAnswer(self::ACTION_VOID);
            $result['STATUS'] = self::STATUS_COMPLETED;
        }
        else
        {
            // Save progress
            $this->saveProgressParameters();
 
            $result = $this->preformAnswer(self::ACTION_EXPORT);
            $result['STATUS'] = self::STATUS_PROGRESS;
        }
 
        return $result;
    }
 

    public function uploadAction()
    {
        $chunkSize = $this->getSizeTempFile();
 
        $isUploadStarted = ($this->uploadedPart > 0);
        if (!$isUploadStarted)
        {
            $reservedSize = round($chunkSize * ceil($this->totalItems / $this->pageSize) * 1.5);
 
            $this->uploadPath = $this->generateUploadDir(). $this->fileName;
 
            $this->findInitBucket(array(
                'fileSize' => $reservedSize,
                'fileName' => $this->uploadPath,
            ));
 
            if ($this->checkCloudErrors())
            {
                $this->saveProgressParameters();
 
                if ($this->bucket->FileExists($this->uploadPath))
                {
                    if(!$this->bucket->DeleteFile($this->uploadPath))
                    {
                        $this->addError(new Error('File exists in a cloud.'));
                    }
                }
            }
        }
        else
        {
            $this->instanceBucket();
 
            $this->checkCloudErrors();
        }
 
 
        if (!file_exists($this->filePath))
        {
            $this->addError(new Error('Uploading file not exists.'));
        }
 
        if (!empty($this->getErrors()))
        {
            return AjaxJson::createError($this->errorCollection);
        }
 
 
        $isSuccess = false;
 
        if ($this->isExportCompleted && !$isUploadStarted)
        {
            // just only one file
            $uploadFile = array(
                'name' => $this->fileName,
                'size' => $this->fileSize,
                'type' => $this->fileType,
                'tmp_name' => $this->filePath,
            );
 
            if ($this->bucket->SaveFile($this->uploadPath, $uploadFile))
            {
                $this->uploadedPart ++;
                $this->uploadedSize += $chunkSize;
                $isSuccess = true;
                $this->isUploadFinished = true;
            }
            else
            {
                $this->addError(new Error('Uploading error.'));
            }
        }
        else
        {
            $uploader = new \CCloudStorageUpload($this->uploadPath);
            if (!$uploader->isStarted())
            {
                if (!$uploader->Start($this->bucketId, $reservedSize, $this->fileType))
                {
                    $this->addError(new Error('Start uploading error.'));
 
                    return AjaxJson::createError($this->errorCollection);
                }
            }
 
            $part = $this->getContentTempFile();
 
            while ($uploader->hasRetries())
            {
                if ($uploader->Next($part, $this->bucket))
                {
                    $this->uploadedPart ++;
                    $this->uploadedSize += $chunkSize;
                    $isSuccess = true;
                    break;
                }
            }
            unset($part);
 
            // finish
            if ($isSuccess && $this->isExportCompleted)
            {
                if ($uploader->Finish())
                {
                    $this->isUploadFinished = true;
                }
                else
                {
                    $this->addError(new Error('FILE_UNKNOWN_ERROR'));
                }
            }
        }
 
        if ($isSuccess)
        {
            $this->dropTempFile();
        }
 
        // Save progress
        $this->saveProgressParameters();
 
        // continue export into temporally file
        $result = $this->preformAnswer(self::ACTION_UPLOAD);
        $result['STATUS'] = self::STATUS_PROGRESS;
 
        return $result;
    }
 

    public function clearAction()
    {
        $this->cancelAction();
 
        $result = $this->preformAnswer(self::ACTION_CLEAR);
 
        $result['STATUS'] = self::STATUS_COMPLETED;
 
        return $result;
 
    }
 

    public function cancelAction()
    {
        $this->processToken = null;
        $this->isNewProcess = true;
 
        $this->dropTempFile();
 
        $this->instanceBucket();
 
        if ($this->bucket instanceof \CCloudStorageBucket)
        {
            if ($this->bucket->FileExists($this->uploadPath))
            {
                if (!$this->bucket->DeleteFile($this->uploadPath))
                {
                    $this->addError(new Error('Cloud drop error.'));
                }
            }
        }
 
        $this->clearProgressParameters();
 
        $result = $this->preformAnswer(self::ACTION_CANCEL);
 
        $result['STATUS'] = self::STATUS_COMPLETED;
 
        return $result;
    }
 

    public function purgeAction()
    {
        $this->instanceBucket();
 
        if ($this->bucket instanceof \CCloudStorageBucket)
        {
            $dirFiles = $this->bucket->ListFiles($this->generateUploadDir(), true);
 
            $now = new \DateTime('now');
            foreach ($dirFiles['file'] as $fileName)
            {
                if (preg_match('/^([^_]+)_([0-9]{8})_([^_]+)_.+$/i', $fileName, $parts))
                {
                    //$type = $parts[1];
                    //$hash = $parts[3];
                    $date = \DateTime::createFromFormat('Ymd', $parts[2]);
                    $interval = $now->diff($date);
                    if ($interval->d > self::EXPIRE_DAYS)
                    {
                        $this->bucket->DeleteFile($this->generateUploadDir(). $fileName);
                    }
                }
            }
        }
 
        return $this->finishAction();
    }
 

    public function finishAction()
    {
        if ($this->isExportCompleted && !$this->isCloudAvailable)
        {
            // adjust completed local file size
            $this->fileSize = $this->getSizeTempFile();
        }
 
        $result = $this->preformAnswer(self::ACTION_FINISH);
 
        $result['STATUS'] = self::STATUS_COMPLETED;
 
        return $result;
    }
 

    protected function preformAnswer($action)
    {
        if ($action == self::ACTION_CLEAR || $action == self::ACTION_CANCEL || $action == self::ACTION_PURGE)
        {
            $result = [];
        }
        else
        {
            $fileSize = $this->fileSize;
            if (!$this->isExportCompleted && $this->uploadedSize > 0)
            {
                $fileSize = $this->uploadedSize + $this->fileSize;
            }
            elseif ($this->isExportCompleted && $this->uploadedSize > $this->fileSize)
            {
                $fileSize = $this->uploadedSize;
            }
 
            $result = array(
                'STATUS' => ($this->isExportCompleted ? self::STATUS_COMPLETED : self::STATUS_PROGRESS),
                'PROCESSED_ITEMS' => $this->processedItems,
                'TOTAL_ITEMS' => $this->totalItems,
                'UPLOADED_PART' => $this->uploadedPart,
                'UPLOADED_SIZE' => $this->uploadedSize,
                'UPLOADED_SIZE_FORMAT' => \CFile::FormatSize($this->uploadedSize),
                'FILE_SIZE_FORMAT' => \CFile::FormatSize($fileSize),
            );
 
            $messagePlaceholders = array(
                '#PROCESSED_ITEMS#' => $this->processedItems,
                '#TOTAL_ITEMS#' => $this->totalItems,
                '#UPLOADED_PART#' => $this->uploadedPart,
                '#UPLOADED_SIZE#' => $this->uploadedSize,
                '#UPLOADED_SIZE_FORMAT#' => \CFile::FormatSize($this->uploadedSize),
                '#FILE_SIZE_FORMAT#' => \CFile::FormatSize($fileSize),
            );
        }
 
        if ($action == self::ACTION_VOID)
        {
            $message = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_VOID'));
        }
        elseif ($action == self::ACTION_PURGE)
        {
            $message = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_PURGE'));
        }
        elseif ($action == self::ACTION_CLEAR)
        {
            $message = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_FILE_DROPPED'));
        }
        elseif ($action == self::ACTION_CANCEL)
        {
            $message = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_ACTION_CANCEL'));
        }
        elseif ($action == self::ACTION_UPLOAD)
        {
            $message =
                htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_ACTION_UPLOAD', $messagePlaceholders)). '<br>'.
                $this->preformExpectedDuration();
        }
        elseif ($action == self::ACTION_EXPORT)
        {
            $message =
                htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_ACTION_EXPORT', $messagePlaceholders)). '<br>'.
                $this->preformExpectedDuration();
        }
        elseif ($this->isExportCompleted)
        {
            $message =
                htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_COMPLETED')). '<br>'.
                htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_ACTION_EXPORT', $messagePlaceholders));
 
            $downloadLink = '';
            if ($this->isBitrix24 || $this->useCloud === true)
            {
                if ($this->isUploadFinished)
                {
                    $downloadLink = $this->generateCloudLink();
                }
            }
            else
            {
                $downloadLink = $this->generateDownloadLink();
            }
            if ($downloadLink !== '')
            {
                $result['DOWNLOAD_LINK'] = $downloadLink;
                $result['FILE_NAME'] = $this->fileName;
                $result['DOWNLOAD_LINK_NAME'] = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_DOWNLOAD'));
                $result['CLEAR_LINK_NAME'] = htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_CLEAR'));
            }
        }
        else
        {
            $message =
                htmlspecialcharsbx(Loc::getMessage('MAIN_EXPORT_ACTION_EXPORT', $messagePlaceholders)). '<br>'.
                $this->preformExpectedDuration();
        }
 
        $result['SUMMARY_HTML'] = $message;
 
        return $result;
    }

    protected function preformExpectedDuration()
    {
        $message = '';
        $avgStepDuration = $predictedStepCount = $predictedTimeDuration = 0;
        $avgRowsPerStep = $this->getRowsPerPage();
        if ($this->stepCount > 0 && $this->timeStart > 0)
        {
            $avgStepDuration = ceil((time() - $this->timeStart) / $this->stepCount);
            if ($this->processedItems > 0)
            {
                $avgRowsPerStep = ceil($this->processedItems / $this->stepCount);
            }
            if ($avgRowsPerStep < 1)
            {
                $avgRowsPerStep = 1;
            }
        }
        if ($this->totalItems > 0)
        {
            $predictedStepCount = ceil(($this->totalItems - $this->processedItems) / $avgRowsPerStep);
            if ($this->useCloud === true)
            {
                $predictedStepCount *= 2;
            }
        }
        if ($avgStepDuration > 0 && $predictedStepCount > 0)
        {
            $predictedTimeDuration = $avgStepDuration * $predictedStepCount * 1.1;
        }
        if ($predictedTimeDuration > 0)
        {
            $predictedTimeDurationHours = floor($predictedTimeDuration / 3600);
            if ($predictedTimeDurationHours > 0)
            {
                $predictedTimeDurationMinutes = ceil(($predictedTimeDuration - $predictedTimeDurationHours * 3600) / 60);
                $message =
                    Loc::getMessage('MAIN_EXPORT_EXPECTED_DURATION').' '.
                    Loc::getMessage('MAIN_EXPORT_EXPECTED_DURATION_HOURS', array(
                        '#HOURS#' => $predictedTimeDurationHours,
                        '#MINUTES#' => $predictedTimeDurationMinutes,
                    ));
            }
            else
            {
                $predictedTimeDurationMinutes = ceil($predictedTimeDuration / 60);
                $message =
                    Loc::getMessage('MAIN_EXPORT_EXPECTED_DURATION').' '.
                    Loc::getMessage('MAIN_EXPORT_EXPECTED_DURATION_MINUTES', array(
                        '#MINUTES#' => ($predictedTimeDurationMinutes < 1 ? "&lt;&nbsp;1" : $predictedTimeDurationMinutes),
                    ));
            }
        }
 
        return $message;
    }
 

    protected function generateDownloadLink()
    {
        $params = array(
            'PROCESS_TOKEN' => $this->processToken,
            'EXPORT_TYPE' => $this->exportType,
            'COMPONENT_NAME' => $this->componentName,
        );
 
        return $this->getActionUri(self::ACTION_DOWNLOAD, $params);
    }

    protected function generateCloudLink()
    {
        $this->instanceBucket();
 
        if ($this->checkCloudErrors())
        {
            return $this->bucket->GetFileSRC($this->uploadPath);
        }
 
        return '';
    }
 

    protected function checkCommonErrors($action)
    {
        if (empty($this->module))
        {
            $this->addError(new Error('Module Id property is not filled.'));
        }
        if (!Main\Loader::includeModule($this->module))
        {
            $this->addError(new Error('Module '.$this->module.' is not included.'));
        }
 
        if ($this->isBitrix24)
        {
            if ($this->isCloudAvailable !== true)
            {
                $this->addError(new Error(Loc::getMessage('MAIN_EXPORT_ERROR_NO_CLOUD_BUCKET')));
            }
        }
 
        if ($action->getName() === self::ACTION_PURGE)
        {
            return true;
        }
 
        if ($this->componentName === '')
        {
            $this->addError(new Error('Component name is not specified.'));
        }
        if (!in_array($this->exportType, array(self::EXPORT_TYPE_CSV, self::EXPORT_TYPE_EXCEL), true))
        {
            $this->addError(new Error('The export type is not supported.'));
        }
 
        if($this->processToken === '')
        {
            $this->addError(new Error('Process token is not specified.'));
        }
 
        return empty($this->getErrors());
    }
 

    protected function checkCloudErrors()
    {
        if (!($this->bucket instanceof \CCloudStorageBucket))
        {
            $this->errorCollection[] = new Error(Loc::getMessage('MAIN_EXPORT_ERROR_NO_CLOUD_BUCKET'));
        }
 
        return empty($this->getErrors());
    }
 

    protected function findInitBucket(array $attributes)
    {
        if (!($this->bucket instanceof \CCloudStorageBucket))
        {
            $this->bucket = \CCloudStorage::FindBucketForFile(
                array(
                    'FILE_SIZE' => $attributes['fileSize'],
                    'MODULE_ID' => $this->module,
                ),
                $attributes['fileName']
            );
 
            if (
                $this->bucket === null ||
                !($this->bucket instanceof \CCloudStorageBucket) ||
                !$this->bucket->init()
            )
            {
                return false;
            }
 
            $this->bucketId = $this->bucket->ID;
            $this->cloudMinChunkSize = $this->bucket->GetService()->GetMinUploadPartSize(); //5M
        }
 
        return true;
    }

    protected function instanceBucket()
    {
        if (!($this->bucket instanceof \CCloudStorageBucket))
        {
            if ($this->bucketId > 0)
            {
                $this->bucket = new \CCloudStorageBucket($this->bucketId);
                $this->bucket->init();
            }
        }
 
        return $this->bucket;
    }

    protected function getBucketList($filter = [])
    {
        $result = [];
        $res = \CCloudStorageBucket::GetList([], array_merge(array('ACTIVE' => 'Y', 'READ_ONLY' => 'N'), $filter));
        while($bucket = $res->Fetch())
        {
            $result[] = $bucket;
        }
 
        return $result;
    }

    protected function saveProgressParameters(): void
    {
        // store state
        $progressData = [
            'processToken' => $this->processToken,
        ];
        foreach ($this->fieldToStoreInProcess as $fieldName)
        {
            $progressData[$fieldName] = $this->{$fieldName};
        }
 
        $progressData = (new Signer())->sign(Json::encode($progressData));
 
        $localStorage = Application::getInstance()->getLocalSession($this->module.'_export_stepper');
        $localStorage->set($this->getProgressParameterOptionName(), $progressData);
    }

    protected function getProgressParameters()
    {
        $localStorage = Application::getInstance()->getLocalSession($this->module.'_export_stepper');
        $progressData = $localStorage->get($this->getProgressParameterOptionName());
 
        if ($progressData)
        {
            try
            {
                $progressData = Json::decode((new Signer())->unsign($progressData));
            }
            catch (BadSignatureException $exception)
            {
                $progressData = [];
            }
            catch (ArgumentException $exception)
            {
                $progressData = [];
            }
        }
 
        if (!is_array($progressData))
        {
            $progressData = [];
        }
 
        return $progressData;
    }

    protected function clearProgressParameters(): void
    {
        $localStorage = Application::getInstance()->getLocalSession($this->module.'_export_stepper');
        $localStorage->offsetUnset($this->getProgressParameterOptionName());
    }

    protected function getProgressParameterOptionName()
    {
        return $this->module. '_cloud_export';
    }

    protected function generateExportFileName()
    {
        if ($this->exportType === self::EXPORT_TYPE_CSV)
        {
            $fileExt = 'csv';
        }
        elseif ($this->exportType === self::EXPORT_TYPE_EXCEL)
        {
            $fileExt = 'xls';
        }
 
        $prefix = date('Ymd');
        $hash = str_pad(dechex(crc32($prefix)), 8, '0', STR_PAD_LEFT);
 
        return uniqid($prefix. '_'. $hash. '_', false).'.'.$fileExt;
    }

    protected function getFileType()
    {
        if ($this->exportType === self::EXPORT_TYPE_CSV)
        {
            $fileType = 'application/csv';
        }
        elseif ($this->exportType === self::EXPORT_TYPE_EXCEL)
        {
            $fileType = 'application/vnd.ms-excel';
        }
 
        return $fileType;
    }

    protected function generateTempDirPath()
    {
        $tempDir = \CTempFile::GetDirectoryName(self::KEEP_FILE_HOURS, array($this->module, uniqid( 'export_', true)));
 
        \CheckDirPath($tempDir);
 
        return $tempDir;
    }

    protected function generateUploadDir()
    {
        return self::EXPORT_PATH;
    }
 

    protected function getSignedParameters($componentName, array $params)
    {
        return Main\Component\ParameterSigner::signParameters($componentName, $params);
    }
 

    protected function decodeSignedParameters($componentName, $signedParameters)
    {
        return Main\Component\ParameterSigner::unsignParameters($componentName, $signedParameters);
    }

    protected function writeTempFile($data, $precedeUtf8Bom = true)
    {
        $file = fopen($this->filePath, 'ab');
        if(is_resource($file))
        {
            // add UTF-8 BOM marker
            if($precedeUtf8Bom === true && (filesize($this->filePath) === 0))
            {
                fwrite($file, chr(239).chr(187).chr(191));
            }
 
            fwrite($file, $data);
            fclose($file);
            unset($file);
 
            $this->fileSize = filesize($this->filePath);
        }
    }

    protected function dropTempFile()
    {
        if (file_exists($this->filePath))
        {
            @unlink($this->filePath);
        }
        $this->fileSize = 0;
    }

    protected function getContentTempFile()
    {
        return file_get_contents($this->filePath);
    }

    protected function getSizeTempFile()
    {
        $this->fileSize = filesize($this->filePath);
 
        return $this->fileSize;
    }

    protected function startTimer($timeLimit = 25): void
    {
        $this->timeLimit = $timeLimit;
 
        if (defined('START_EXEC_TIME') && START_EXEC_TIME > 0)
        {
            $this->hitStartTime = (int)START_EXEC_TIME;
        }
        else
        {
            $this->hitStartTime = time();
        }
    }
 

    protected function hasTimeLimitReached(): bool
    {
        if ($this->timeLimit > 0)
        {
            if ($this->timeLimitReached)
            {
                return true;
            }
            if ((time() - $this->hitStartTime) >= $this->timeLimit)
            {
                $this->timeLimitReached = true;
 
                return true;
            }
        }
 
        return false;
    }

    protected function getRowsPerPage(): int
    {
        return static::ROWS_PER_PAGE;
    }
}