Added cache_listeners to Configuration and Extension

Author: Till Hildebrandt

src/DependencyInjection/Configuration.php

@@ -3,6 +3,7 @@
 namespace Http\HttplugBundle\DependencyInjection;
 
 use Http\Client\Common\Plugin\Cache\Generator\CacheKeyGenerator;
+use Http\Client\Common\Plugin\Cache\Listener\CacheListener;
 use Http\Client\Common\Plugin\CachePlugin;
 use Http\Client\Common\Plugin\Journal;
 use Http\Client\Plugin\Vcr\NamingStrategy\NamingStrategyInterface;
@@ -739,6 +740,12 @@ private function createCachePluginNode()
                         ->end()
                     ->end()
                 ->end()
+                ->arrayNode('cache_listeners')
+                    ->info('An array of services to act on the response based on the results of the cache check. Must implement ' . CacheListener::class . ' Defaults to an empty array.')
+                    ->defaultValue([])
+                    ->prototype('scalar')
+                    ->end()
+                ->end()
                 ->scalarNode('respect_cache_headers')
                     ->info('Whether we should care about cache headers or not [DEPRECATED]')
                     ->beforeNormalization()

src/DependencyInjection/HttplugExtension.php

@@ -203,10 +203,17 @@ private function configurePluginByName($name, Definition $definition, array $con
         switch ($name) {
             case 'cache':
                 $options = $config['config'];
+
                 if (!empty($options['cache_key_generator'])) {
                     $options['cache_key_generator'] = new Reference($options['cache_key_generator']);
                 }
 
+                if (!empty($options['cache_listeners'])) {
+                    foreach ($options['cache_listeners'] as $i => $listener) {
+                        $options['cache_listeners'][$i] = new Reference($listener);
+                    }
+                }
+
                 $definition
                     ->replaceArgument(0, new Reference($config['cache_pool']))
                     ->replaceArgument(1, new Reference($config['stream_factory']))