component.php

<?php
namespace Bitrix\Main\Engine\Response\ContentArea;
 
class Component implements ContentAreaInterface, DataSectionInterface
{
    private $componentName = null;
    private $componentTemplate = null;
    private $componentParams = [];
    private $componentResult = [];
 
    private $dataKeys = [];
    private $parentComponent = null;
    private $functionParams = [];
 
    public function __construct($componentName, $componentTemplate = '', array $componentParams = [], $dataKeys = [])
    {
        $this->componentName = $componentName;
        $this->componentTemplate = $componentTemplate;
        $this->dataKeys = $dataKeys;
        $this->setParameters($componentParams);
    }
 
    public function setParameters(array $params)
    {
        $this->componentParams = $params;
 
        return $this;
    }
 
    public function setParentComponent($parentComponent)
    {
        $this->parentComponent = $parentComponent;
 
        return $this;
    }
 
    public function setFunctionParameters(array $functionParams)
    {
        $this->functionParams = $functionParams;
 
        return $this;
    }
 
    public function getHtml()
    {
        global $APPLICATION;
 
        ob_start();
        $this->componentResult = $APPLICATION->IncludeComponent(
            $this->componentName,
            $this->componentTemplate,
            $this->componentParams,
            $this->parentComponent,
            $this->functionParams,
            !empty($this->dataKeys) // returnResult
        );
 
        return ob_get_clean();
    }
 
    public function getSectionName(): string
    {
        return 'componentResult';
    }
 
    public function getSectionData()
    {
        $result = [];
 
        if (
            is_array($this->dataKeys)
            && !empty($this->dataKeys)
        )
        {
            $result = array_intersect_key($this->componentResult, array_combine($this->dataKeys, $this->dataKeys));
        }
        elseif (is_callable($this->dataKeys))
        {
            $result = call_user_func_array($this->dataKeys, [ $this->componentResult ]);
        }
 
        return $result;
    }
}