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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the Superdesk Web Publisher Templates System. |
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* |
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* Copyright 2015 Sourcefabric z.ú. and contributors. |
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* |
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* For the full copyright and license information, please see the |
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* AUTHORS and LICENSE files distributed with this source code. |
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* |
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* @copyright 2015 Sourcefabric z.ú |
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* @license http://www.superdesk.org/license |
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*/ |
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namespace SWP\Component\TemplatesSystem\Gimme\Loader; |
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/** |
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* ChainLoader is a loader that calls other loaders to load Meta objects. |
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*/ |
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class ChainLoader implements LoaderInterface |
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{ |
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protected $loaders = []; |
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/** |
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* Adds a loader instance. |
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* |
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* @param LoaderInterface $loader A Loader instance |
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*/ |
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public function addLoader(LoaderInterface $loader) |
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{ |
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if (false !== $key = array_search($loader, $this->loaders)) { |
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$this->loaders[$key] = $loader; |
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} else { |
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$this->loaders[] = $loader; |
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} |
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} |
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/** |
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* @param LoaderInterface $loader |
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* |
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* @return bool |
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*/ |
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public function removeLoader(LoaderInterface $loader) |
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{ |
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if (false !== $key = array_search($loader, $this->loaders)) { |
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unset($this->loaders[$key]); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Loads a Meta class from given datasource. |
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* |
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* @param string $type object type |
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* @param array|null $parameters parameters needed to load required object type |
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* @param int $responseType response type: single meta (LoaderInterface::SINGLE) or collection of metas (LoaderInterface::COLLECTION) |
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* |
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* @return Meta|bool false if meta cannot be loaded, a Meta instance otherwise |
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*/ |
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public function load($type, $parameters = [], $responseType = LoaderInterface::SINGLE) |
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{ |
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foreach ($this->loaders as $loader) { |
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if ($loader->isSupported($type)) { |
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if (false !== $meta = $loader->load($type, $parameters, $responseType)) { |
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return $meta; |
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} |
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} |
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} |
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return false; |
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} |
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/** |
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* Checks if Loader supports provided type. |
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* |
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* @param string $type |
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* |
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* @return bool |
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*/ |
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public function isSupported(string $type): bool |
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{ |
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foreach ($this->loaders as $loader) { |
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if ($loader->isSupported($type)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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SuperdeskWebPublisher /
templates-system
