clearncacheoflessontreecomponent.php

См. документацию.

<?php
 
class CLearnCacheOfLessonTreeComponent
{
    const OPTION_NAME = '~CacheOfLessonTreeComponentIsDirty';
    const OPTION_TS   = '~CacheOfLessonTreeComponentTS';   // timestamp of last ditry cache
    const CACHE_PATH  = '/learning/LessonTreeComponent/';
    const TTL         = 3600;
 
    public static function IsDirty()
    {
        $isCacheDirty = COption::GetOptionInt(
            'learning', 
            self::OPTION_NAME, 
            1);
 
        return ( (boolean) $isCacheDirty );
    }
 
 
    public static function MarkAsDirty()
    {
        COption::SetOptionString(
            'learning', 
            self::OPTION_NAME, 
            1
        );
 
        COption::SetOptionString(
            'learning', 
            self::OPTION_TS, 
            time()
        );
    }
 
 
    public static function MarkAsClean()
    {
        COption::SetOptionString(
            'learning', 
            self::OPTION_NAME, 
            0
        );
    }
 
 
    public static function Purge()
    {
        $oCache = new CPHPCache();
        $oCache->CleanDir(self::CACHE_PATH);
    }
 
 
    public static function GetData($courseId)
    {
        $arContents = array();
        $cacheId = 'course_id_' . (string) ((int) $courseId);
        $oCache = new CPHPCache();
 
        if (
            $oCache->InitCache(self::TTL, $cacheId, self::CACHE_PATH)
            && ( ! self::IsDirty() )
        )
        {
            $arCached = $oCache->GetVars();
            if (isset($arCached['arContents']) && is_array($arCached['arContents']))
                $arContents = $arCached['arContents'];
        }
        else
        {
            self::Purge();
 
            $arContents = self::GetDataWoCache($courseId);
            $oCache->StartDataCache(self::TTL, $cacheId, self::CACHE_PATH);
            $oCache->EndDataCache(array('arContents' => $arContents));
 
            self::MarkAsClean();
        }
 
        return ($arContents);
    }
 
 
    protected static function GetDataWoCache($courseId)
    {
        $rsContent = CCourse::GetCourseContent(
            $courseId, 
            array(), 
            array('LESSON_ID', 'NAME')
            );
 
        $arContents = array();
        while ($arContent = $rsContent->GetNext())
            $arContents[] = $arContent;
 
        return ($arContents);
    }
}