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PHP

<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Backend\View\BackendLayout;
use Symfony\Component\DependencyInjection\Attribute\AutowireIterator;
use TYPO3\CMS\Core\SingletonInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;
/**
* Collection of backend layout data providers.
*/
class DataProviderCollection implements SingletonInterface
{
/**
* @var array<non-empty-string, DataProviderInterface>
*/
protected array $dataProviders = [];
protected array $results = [];
/**
* @param iterable<DataProviderInterface> $dataProviders
*/
public function __construct(
#[AutowireIterator('page_layout.data_provider')]
iterable $dataProviders = [],
) {
foreach ($dataProviders as $dataProvider) {
$this->validateDataProvider($dataProvider);
$identifier = $dataProvider->getIdentifier();
if (isset($this->dataProviders[$identifier])) {
throw new \LogicException(
sprintf(
'A backend layout data provider with identifier "%s" is already registered.',
$identifier
),
1762361129,
);
}
$this->dataProviders[$identifier] = $dataProvider;
}
}
protected function validateDataProvider(mixed $dataProvider): void
{
if (!($dataProvider instanceof DataProviderInterface)) {
throw new \LogicException(
sprintf(
'Data provider must implement interface %s, %s given.',
DataProviderInterface::class,
get_debug_type($dataProvider),
),
1381269811,
);
}
$identifier = $dataProvider->getIdentifier();
if (str_contains($identifier, '__')) {
throw new \UnexpectedValueException('Identifier "' . $identifier . '" must not contain "__"', 1381597629);
}
}
/**
* Gets all backend layout collections and thus, all
* backend layouts. Each data provider returns its own
* backend layout collection.
*
* @return BackendLayoutCollection[]
*/
public function getBackendLayoutCollections(DataProviderContext $dataProviderContext): array
{
$result = [];
foreach ($this->dataProviders as $identifier => $dataProvider) {
$backendLayoutCollection = $this->createBackendLayoutCollection($identifier);
$dataProvider->addBackendLayouts($dataProviderContext, $backendLayoutCollection);
$result[$identifier] = $backendLayoutCollection;
}
return $result;
}
/**
* Gets a backend layout by a combined identifier, which is
* e.g. "myextension_regular" and "myextension" is the identifier
* of the accordant data provider and "regular" the identifier of
* the accordant backend layout.
*/
public function getBackendLayout(string $combinedIdentifier, int $pageId): ?BackendLayout
{
$backendLayout = null;
if (!str_contains($combinedIdentifier, '__')) {
$dataProviderIdentifier = 'default';
$backendLayoutIdentifier = $combinedIdentifier;
} else {
[$dataProviderIdentifier, $backendLayoutIdentifier] = explode('__', $combinedIdentifier, 2);
}
if (isset($this->dataProviders[$dataProviderIdentifier])) {
$backendLayout = $this->dataProviders[$dataProviderIdentifier]->getBackendLayout($backendLayoutIdentifier, $pageId);
}
return $backendLayout;
}
/**
* Creates a new backend layout collection.
*/
protected function createBackendLayoutCollection(string $identifier): BackendLayoutCollection
{
return GeneralUtility::makeInstance(
BackendLayoutCollection::class,
$identifier
);
}
}