ExportStep.php

<?php
 
namespace Bitrix\UI\Integration\Rest;
 
use \Bitrix\Main;
 
 
abstract class ExportStep {
    //region input info
    public string $entityCode;
    public $entityId;
    public Main\Type\Dictionary $previous;
    public int $stepNumber;
    //end region
    //region OutputInfo
    public Main\Type\Dictionary $data;
    public Main\Type\Dictionary $files;
    public Main\Type\Dictionary $next;
    public Main\ErrorCollection $errorCollection;
    //endregion
    public function __construct(Main\Event $event)
    {
        $this->entityCode = $event->getParameter('CODE');
        $this->entityId = $event->getParameter('ITEM_CODE');
        $this->stepNumber = (int) $event->getParameter('STEP');
        $data = json_decode($event->getParameter('NEXT') ?: '', true);
        $this->previousStep = new Main\Type\Dictionary(($data ?: []));
 
        $this->data = new Main\Type\Dictionary();
        $this->files = new Main\Type\Dictionary();
        $this->nextStep = new Main\Type\Dictionary();
        $this->errorCollection = new Main\ErrorCollection();
 
        $this->init();
    }
 
    abstract public function init(): void;
 
    public function makeAnAnswer(): ?array
    {
        return [
            'FILE_NAME' =>
                implode('_',
                    [
                        (new \ReflectionClass(static::class))->getShortName(),
                        $this->entityCode,
                        $this->entityId,
                        $this->stepNumber
                    ]
                ),
            'CONTENT' => $this->data->toArray(),
            'FILES' => $this->files->toArray(),
            'NEXT' => $this->nextStep->count() <= 0
                ? false : json_encode($this->nextStep->toArray()),
 
        ] + (($error = $this->errorCollection->current()) ? [
            'ERROR_MESSAGE' => $error->getMessage(),
            'ERROR_ACTION' => $error->getCode(),
        ] : []);
    }
 
    public static function fulfill(Main\Event $event): array
    {
        $step = new static($event);
        return $step->makeAnAnswer();
    }
}