+<?php
+
+namespace Drupal\libraries\ExternalLibrary\Asset;
+
+use Drupal\Component\Plugin\Factory\FactoryInterface;
+use Drupal\libraries\ExternalLibrary\Dependency\DependentLibraryInterface;
+use Drupal\libraries\ExternalLibrary\Exception\LibraryNotInstalledException;
+use Drupal\libraries\ExternalLibrary\LibraryBase;
+use Drupal\libraries\ExternalLibrary\LibraryManagerInterface;
+use Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface;
+use Drupal\libraries\ExternalLibrary\Local\LocalLibraryTrait;
+use Drupal\libraries\ExternalLibrary\Remote\RemoteLibraryInterface;
+use Drupal\libraries\ExternalLibrary\Remote\RemoteLibraryTrait;
+use Drupal\libraries\ExternalLibrary\Type\LibraryTypeInterface;
+use Drupal\libraries\ExternalLibrary\Version\VersionedLibraryInterface;
+
+/**
+ * Provides a class for a library with multiple attachable asset libraries.
+ */
+class MultipleAssetLibrary extends LibraryBase implements
+ MultipleAssetLibraryInterface,
+ VersionedLibraryInterface,
+ DependentLibraryInterface,
+ LocalLibraryInterface,
+ RemoteLibraryInterface
+{
+
+ use
+ LocalLibraryTrait,
+ RemoteLibraryTrait,
+ LocalRemoteAssetTrait
+ ;
+
+ /**
+ * An array of attachable asset libraries.
+ */
+ protected $libraries = [];
+
+ /**
+ * Construct an external library.
+ *
+ * @param string $id
+ * The library ID.
+ * @param array $definition
+ * The library definition array.
+ * @param \Drupal\libraries\ExternalLibrary\Type\LibraryTypeInterface $library_type
+ * The library type of the library.
+ */
+ public function __construct($id, array $definition, LibraryTypeInterface $library_type) {
+ parent::__construct($id, $definition, $library_type);
+ $this->remoteUrl = $definition['remote_url'];
+ $this->libraries = $definition['libraries'];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected static function processDefinition(array &$definition) {
+ parent::processDefinition($definition);
+ $definition += [
+ 'remote_url' => '',
+ 'libraries' => [],
+ ];
+ foreach ($definition['libraries'] as &$library) {
+ $library += [
+ 'css' => [],
+ 'js' => [],
+ 'dependencies' => [],
+ ];
+ }
+ }
+
+ /**
+ * Returns a core library array structure for this library.
+ *
+ * @param \Drupal\libraries\ExternalLibrary\LibraryManagerInterface $library_manager
+ * The library manager that can be used to fetch dependencies.
+ *
+ * @return array
+ *
+ * @see \Drupal\libraries\ExternalLibrary\Asset\getAttachableAssetLibraries::getAttachableAssetLibraries()
+ *
+ * @throws \Drupal\libraries\ExternalLibrary\Exception\InvalidLibraryDependencyException
+ * @throws \Drupal\libraries\ExternalLibrary\Exception\LibraryDefinitionNotFoundException
+ * @throws \Drupal\libraries\ExternalLibrary\Exception\LibraryTypeNotFoundException
+ * @throws \Drupal\Component\Plugin\Exception\PluginException
+ *
+ * @todo Document the return value.
+ */
+ public function getAttachableAssetLibraries(LibraryManagerInterface $library_manager) {
+ if (!$this->canBeAttached()) {
+ throw new LibraryNotInstalledException($this);
+ }
+ $attachable_libraries = [];
+ foreach ($this->libraries as $attachable_library_id => $attachable_library) {
+ $attachable_libraries[$attachable_library_id] = [
+ 'version' => $this->getVersion(),
+ 'css' => $this->processCssAssets($attachable_library['css']),
+ 'js' => $this->processJsAssets($attachable_library['js']),
+ 'dependencies' => $attachable_library['dependencies'],
+ ];
+ }
+ return $attachable_libraries;
+ }
+
+ /**
+ * Gets the locator of this library using the locator factory.
+ *
+ * @param \Drupal\Component\Plugin\Factory\FactoryInterface $locator_factory
+ *
+ * @return \Drupal\libraries\ExternalLibrary\Local\LocatorInterface
+ *
+ * @see \Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface::getLocator()
+ */
+ public function getLocator(FactoryInterface $locator_factory) {
+ // @todo Consider consolidating the stream wrappers used here. For now we
+ // allow asset libs to live almost anywhere.
+ return $locator_factory->createInstance('chain')
+ ->addLocator($locator_factory->createInstance('uri', ['uri' => 'asset://']))
+ ->addLocator($locator_factory->createInstance('uri', ['uri' => 'php-file://']));
+ }
+
+}