Урок №2. Анатомия class.php. Собираем идеальный каркас и управляем жизненным циклом

        // lesson-01-legacy/component.php

if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED !== true) die();

global $USER, $APPLICATION;

$arParams["IBLOCK_ID"] = intval($arParams["IBLOCK_ID"]);
$arParams["NEWS_COUNT"] = $arParams["NEWS_COUNT"] ? intval($arParams["NEWS_COUNT"]) : 10;
$arParams["CACHE_TIME"] = $arParams["CACHE_TIME"] ? intval($arParams["CACHE_TIME"]) : 3600;

CModule::IncludeModule("iblock");

$obCache = new CPHPCache();
$cacheTime = $arParams["CACHE_TIME"];
$cacheId = serialize($arParams);
$cachePath = "/" . SITE_ID . "/news_list/";

if ($obCache->InitCache($cacheTime, $cacheId, $cachePath)) {
    $vars = $obCache->GetVars();
    $arResult = $vars["arResult"];
} else {
    $obCache->StartDataCache();
    $arResult = array();
    $arResult["ITEMS"] = array();

    $rsElements = CIBlockElement::GetList(
        array("ACTIVE_FROM" => "DESC", "ID" => "DESC"),
        array("IBLOCK_ID" => $arParams["IBLOCK_ID"], "ACTIVE" => "Y"),
        false,
        array("nTopCount" => $arParams["NEWS_COUNT"]),
        array("ID", "NAME", "PREVIEW_TEXT", "PREVIEW_PICTURE", "DETAIL_PAGE_URL", "ACTIVE_FROM", "CREATED_BY")
    );

    while ($obElement = $rsElements->GetNextElement()) {
        $arItem = $obElement->GetFields();
        // ... форматирование, N+1 запросы авторов ...
        $arResult["ITEMS"][] = $arItem;
    }

    $obCache->EndDataCache(array("arResult" => $arResult));
}

$APPLICATION->SetTitle("Новости компании");
$this->IncludeComponentTemplate();

    

        // lesson-02-class-basics/step-2-lifecycle/class.php

if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED !== true) die();

use Bitrix\Main\Loader;

class NewsListComponent extends CBitrixComponent
{
    /**
     * Валидация параметров - теперь в отдельном методе!
     */
    public function onPrepareComponentParams($params): array
    {
        $params["IBLOCK_ID"] = (int)($params["IBLOCK_ID"] ?? 0);
        $params["NEWS_COUNT"] = (int)($params["NEWS_COUNT"] ?? 10);
        $params["CACHE_TIME"] = (int)($params["CACHE_TIME"] ?? 3600);

        return $params;
    }

    /**
     * Проверка подключения модулей
     */
    protected function checkModules(): void
    {
        if (!Loader::includeModule("iblock")) {
            throw new \Bitrix\Main\SystemException("Модуль iblock не установлен");
        }
    }

    public function executeComponent()
    {
        try {
            $this->checkModules();

            if ($this->startResultCache()) {
                // ... логика выборки данных (CIBlockElement::GetList) ...
                
                $this->includeComponentTemplate();
            }

        } catch (\Exception $e) {
            $this->abortResultCache();
            ShowError($e->getMessage());
        }

        // SEO и заголовки
        $GLOBALS["APPLICATION"]->SetTitle("Новости компании");
    }
}