function StackedSessionHandlerPass::process

File

core/lib/Drupal/Core/DependencyInjection/Compiler/StackedSessionHandlerPass.php, line 17

Class

StackedSessionHandlerPass

Provides a compiler pass for stacked session save handlers.

Namespace

Code

public function process(ContainerBuilder $container) {
    if ($container->hasDefinition('session_handler')) {
        return;
    }
    $session_handler_proxies = [];
    $priorities = [];
    foreach ($container->findTaggedServiceIds('session_handler_proxy') as $id => $attributes) {
        $priorities[$id] = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
        $session_handler_proxies[$id] = $container->getDefinition($id);
    }
    array_multisort($priorities, SORT_ASC, $session_handler_proxies);
    $decorated_id = 'session_handler.storage';
    foreach ($session_handler_proxies as $id => $decorator) {
        // Prepend the inner session handler as first constructor argument.
        $arguments = $decorator->getArguments();
        array_unshift($arguments, new Reference($decorated_id));
        $decorator->setArguments($arguments);
        $decorated_id = $id;
    }
    $container->setAlias('session_handler', $decorated_id);
}