panel.php

<?php
 
namespace Bitrix\Main\Grid\Panel;
 
use Bitrix\Main\Filter\Filter;
use Bitrix\Main\Grid\GridRequest;
use Bitrix\Main\Grid\GridResponse;
use Bitrix\Main\Grid\Panel\Action\DataProvider;
use Bitrix\Main\Grid\Panel\Action\Action;
use Bitrix\Main\Grid\Panel\Action\GroupAction;
use Bitrix\Main\Grid\UI\Response\GridResponseFactory;
 
class Panel
{
    private array $actions;
    private array $controls;
    private array $providers;
 
    public function __construct(DataProvider ...$providers)
    {
        $this->providers = [];
        foreach ($providers as $provider)
        {
            $this->providers[] = $provider;
        }
    }
 
    final public function getActions(): array
    {
        if (!isset($this->actions))
        {
            $this->actions = [];
 
            foreach ($this->providers as $provider)
            {
                foreach ($provider->prepareActions() as $action)
                {
                    $this->actions[$action::getId()] ??= $action;
                }
            }
        }
 
        return $this->actions;
    }
 
    final protected function getActionById(string $id): ?Action
    {
        if (empty($id))
        {
            return null;
        }
 
        return $this->getActions()[$id] ?? null;
    }
 
    public function getControls(): array
    {
        if (!isset($this->controls))
        {
            $this->controls = [];
 
            foreach ($this->providers as $extraProvider)
            {
                $this->controls += $extraProvider->prepareControls();
            }
        }
 
        return $this->controls;
    }
 
    public function processRequest(GridRequest $request, ?Filter $filter): ?GridResponse
    {
        $result = null;
 
        if (!check_bitrix_sessid())
        {
            return null;
        }
 
        // direct actions
        $action = $this->getActionById(
            $request->getPanelActionId() ?? ''
        );
        if ($action)
        {
            $result = $action->processRequest(
                $request->getHttpRequest(),
                $request->isSelectedAllPanelRows(),
                $filter
            );
        }
        else
        {
            // group actions
            $groupAction = $this->getActionById(GroupAction::getId());
            if ($groupAction)
            {
                $result = $groupAction->processRequest(
                    $request->getHttpRequest(),
                    $request->isSelectedAllPanelGroupRows(),
                    $filter
                );
            }
        }
 
        return
            isset($result)
                ? (new GridResponseFactory)->createFromResult($result)
                : null
        ;
    }
}