processparams.php

См. документацию.

<?php
namespace Bitrix\Translate\Controller;
 
use Bitrix\Translate;

trait ProcessParams
{
    protected array $fieldToStoreInProcess = [];

    public function getProgressParameterOptionName(): string
    {
        $settingId = 'translate';
        if ($this instanceof Translate\Controller\Action)
        {
            $controller = $this->getController();
            $settingId = $controller::SETTING_ID;
        }
        elseif ($this instanceof Translate\Controller\Controller)
        {
            $settingId = static::SETTING_ID;
        }
 
        $classId = \str_replace(['_', '\\'], '', static::class);
 
        $id = "{$settingId}/{$classId}";
 
        if (!empty($this->tabId))
        {
            $id .= '/'. $this->tabId;
        }
 
        return $id;
    }

    public function keepField($fieldName): self
    {
        if (\is_array($fieldName))
        {
            $this->fieldToStoreInProcess = \array_merge($this->fieldToStoreInProcess, $fieldName);
        }
        else
        {
            $this->fieldToStoreInProcess[] = $fieldName;
        }
 
        return $this;
    }

    public function restoreProgressParameters(): self
    {
        if (\count($this->fieldToStoreInProcess) > 0)
        {
            $progressData = $this->getProgressParameters();
            if (\count($progressData) > 0)
            {
                foreach ($this->fieldToStoreInProcess as $fieldName)
                {
                    if (isset($progressData[$fieldName]))
                    {
                        $this->{$fieldName} = $progressData[$fieldName];
                    }
                }
            }
        }
 
        return $this;
    }

    public function saveProgressParameters(): self
    {
        // store state
        $progressData = [];
        foreach ($this->fieldToStoreInProcess as $fieldName)
        {
            $progressData[$fieldName] = $this->{$fieldName};
        }
 
        $optName = \explode('/', $this->getProgressParameterOptionName());
        $storage =& $_SESSION;
        for ($d = 0, $depth = \count($optName); $d < $depth; $d++)
        {
            if (!isset($storage[$optName[$d]]))
            {
                $storage[$optName[$d]] = [];
            }
            $storage =& $storage[$optName[$d]];
        }
 
        $storage = $progressData;
 
        return $this;
    }

    public function getProgressParameters(): array
    {
        $optName = \explode('/', $this->getProgressParameterOptionName());
        $storage =& $_SESSION;
        for ($d = 0, $depth = \count($optName); $d < $depth; $d++)
        {
            if (!isset($storage[$optName[$d]]))
            {
                return [];
            }
            $storage =& $storage[$optName[$d]];
        }
 
        return $storage;
    }

    public function clearProgressParameters(): self
    {
        $optName = \explode('/', $this->getProgressParameterOptionName());
        $storage =& $_SESSION;
        for ($d = 0, $depth = \count($optName); $d < $depth; $d++)
        {
            if (!isset($storage[$optName[$d]]))
            {
                return $this;
            }
            $storage =& $storage[$optName[$d]];
        }
 
        unset($storage);
 
        return $this;
    }
}