function LibraryDependencyResolver::getMinimalRepresentativeSubset

Overrides LibraryDependencyResolverInterface::getMinimalRepresentativeSubset

File

core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php, line 81

Class

LibraryDependencyResolver

Resolves the dependencies of asset (CSS/JavaScript) libraries.

Namespace

Drupal\Core\Asset

Code

public function getMinimalRepresentativeSubset(array $libraries) {
    assert(count($libraries) === count(array_unique($libraries)), '$libraries can\'t contain duplicate items.');
    // Determine each library's dependencies.
    $all_dependencies = [];
    foreach ($libraries as $library) {
        $with_deps = $this->getLibrariesWithDependencies([
            $library,
        ]);
        // We don't need library itself listed in the dependencies.
        $all_dependencies = array_unique(array_merge($all_dependencies, array_diff($with_deps, [
            $library,
        ])));
    }
    return array_values(array_diff($libraries, array_intersect($all_dependencies, $libraries)));
}