manager.php

См. документацию.

<?php
 
namespace Bitrix\Sale\Discount\Preset;
 
use Bitrix\Main\Application;
use Bitrix\Main\ErrorCollection;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
use Bitrix\Main\IO\Directory;
use Bitrix\Main\Loader;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\SystemException;
use Bitrix\Sale\Internals\DiscountTable;
 
final class Manager
{
    const DEFAULT_PRESET_DIRECTORY = '/bitrix/modules/sale/handlers/discountpreset/';
 
    const CATEGORY_PRODUCTS = 4;
    const CATEGORY_PAYMENT  = 5;
    const CATEGORY_DELIVERY = 6;
    const CATEGORY_OTHER    = 7;

    protected $errorCollection;
    private static Manager $instance;
    private array $presetList;
    private bool $restrictedGroupsMode = false;

    public static function getInstance(): Manager
    {
        if (!isset(self::$instance))
        {
            self::$instance = new self;
        }
 
        return self::$instance;
    }

    public function registerAutoLoader()
    {
        if (!$this->isAlreadyRegisteredAutoLoader())
        {
            \spl_autoload_register([$this, 'autoLoad'], true);
        }
    }
 
    private function isAlreadyRegisteredAutoLoader()
    {
        $autoLoaders = spl_autoload_functions();
        if(!$autoLoaders)
        {
            return false;
        }
 
        foreach ($autoLoaders as $autoLoader)
        {
            if(!is_array($autoLoader))
            {
                continue;
            }
 
            list($object, $method) = $autoLoader;
 
            if ($object instanceof $this)
            {
                return true;
            }
        }
 
        return false;
    }
 
    private function __construct()
    {
        $this->errorCollection = new ErrorCollection;
 
        $this->registerAutoLoader();
    }
 
    private function __clone()
    {}
 
    public function enableRestrictedGroupsMode($state)
    {
        $this->restrictedGroupsMode = $state === true;
    }
 
    public function isRestrictedGroupsModeEnabled()
    {
        return $this->restrictedGroupsMode;
    }
 
    public function autoLoad($className)
    {
        $file = ltrim($className, "\\");    // fix web env
        $file = strtr($file, Loader::ALPHA_UPPER, Loader::ALPHA_LOWER);
 
        $documentRoot = $documentRoot = rtrim($_SERVER["DOCUMENT_ROOT"], "/\\");
 
        if(preg_match("#[^\\\\/a-zA-Z0-9_]#", $file))
        {
            return;
        }
 
        $file = str_replace('\\', '/', $file);
        $fileParts = explode("/", $file);
 
        if($fileParts[0] !== "sale" || $fileParts[1] !== "handlers" || $fileParts[2] !== 'discountpreset')
        {
            return;
        }
        array_shift($fileParts);
 
        $filePath = $documentRoot . "/bitrix/modules/sale/" . implode("/", $fileParts) . ".php";
 
        if(file_exists($filePath))
        {
            require_once($filePath);
        }
    }
 
    private function buildPresets()
    {
        if (!isset($this->presetList))
        {
            $this->presetList = array_filter(
                array_merge(
                    $this->buildDefaultPresets(),
                    $this->buildCustomPresets()
                ),
                function(BasePreset $preset)
                {
                    return $preset->getPossible();
                }
            );
        }
 
        return $this;
    }
 
    private function buildCustomPresets()
    {
        $presetList = array();
 
        $event = new Event('sale', 'OnSaleDiscountPresetBuildList');
        $event->send();
 
        foreach($event->getResults() as $evenResult)
        {
            if($evenResult->getType() != EventResult::SUCCESS)
            {
                continue;
            }
 
            $result = $evenResult->getParameters();
            if(!is_array($result))
            {
                throw new SystemException('Wrong event result by building preset list. Must be array.');
            }
 
            foreach($result as $preset)
            {
                if(empty($preset['CLASS']))
                {
                    throw new SystemException('Wrong event result by building preset list. Could not find CLASS.');
                }
 
                if(is_string($preset['CLASS']) && class_exists($preset['CLASS']))
                {
                    $preset = $this->createPresetInstance($preset['CLASS']);
                    if($preset)
                    {
                        $presetList[] = $preset;
                    }
                }
                else
                {
                    throw new SystemException("Wrong event result by building preset list. Could not find class by CLASS {$preset['CLASS']}");
                }
            }
        }
 
        return $presetList;
    }
 
    private function buildDefaultPresets()
    {
        $documentRoot = Application::getDocumentRoot();
 
        if(!Directory::isDirectoryExists($documentRoot . self::DEFAULT_PRESET_DIRECTORY))
        {
            throw new SystemException('Could not find folder with default presets. ' . self::DEFAULT_PRESET_DIRECTORY);
        }
 
        $defaultList = array();
        $directory = new Directory($documentRoot . self::DEFAULT_PRESET_DIRECTORY);
        foreach($directory->getChildren() as $presetFile)
        {
            if(!$presetFile->isFile() || !$presetFile->getName())
            {
                continue;
            }
 
            $className = $this->getClassNameFromPath($presetFile->getPath());
            if($className)
            {
                $preset = $this->createPresetInstance($className);
                if($preset)
                {
                    $defaultList[] = $preset;
                }
            }
        }
 
        return $defaultList;
    }

    private function createPresetInstance($className)
    {
        try
        {
            $class = new \ReflectionClass($className);

            $instance = $class->newInstanceArgs([]);
            $instance->enableRestrictedGroupsMode($this->isRestrictedGroupsModeEnabled());
 
            return $instance;
        }
        catch (\ReflectionException $exception)
        {
        }
 
        return null;
    }
 
    private function getClassNameFromPath($path)
    {
        return "Sale\\Handlers\\DiscountPreset\\" . getFileNameWithoutExtension($path);
    }

    public function getPresets()
    {
        return $this->buildPresets()->presetList;
    }

    public function getPresetById($id)
    {
        if(class_exists($id))
        {
            return $this->createPresetInstance($id);
        }
        else
        {
            foreach($this->buildPresets()->presetList as $preset)
            {
                if($preset::className() === $id)
                {
                    return $preset;
                }
            }
        }
 
        return null;
    }

    public function getPresetsByCategory($category): array
    {
        $presets = [];
        foreach ($this->getPresets() as $preset)
        {
            if ($preset->getCategory() === $category)
            {
                $presets[] = $preset;
            }
        }
 
        uasort(
            $presets,
            static function(BasePreset $a, BasePreset $b): int
            {
                $aSort = (int)$a->getSort();
                $bSort = (int)$b->getSort();
                if ($aSort === $bSort) {
                    return 0;
                }
                return ($aSort < $bSort) ? -1 : 1;
            }
        );
 
        return $presets;
    }
 
    public function getCategoryList(): array
    {
        return [
            self::CATEGORY_PRODUCTS => Loc::getMessage('SALE_PRESET_DISCOUNT_MANAGER_CATEGORY_PRODUCTS'),
            self::CATEGORY_PAYMENT => Loc::getMessage('SALE_PRESET_DISCOUNT_MANAGER_CATEGORY_PAYMENT'),
            self::CATEGORY_DELIVERY => Loc::getMessage('SALE_PRESET_DISCOUNT_MANAGER_CATEGORY_DELIVERY'),
            self::CATEGORY_OTHER => Loc::getMessage('SALE_PRESET_DISCOUNT_MANAGER_CATEGORY_OTHER'),
        ];
    }
 
    public function getCategoryName($category)
    {
        $categoryList = $this->getCategoryList();
 
        return $categoryList[$category] ?? '';
    }
 
    public function hasCreatedDiscounts(BasePreset $preset): bool
    {
        $count = DiscountTable::getCount([
            '=PRESET_ID' => $preset::className()
        ]);
 
        return $count > 0;
    }
}