Added plugin support for purge clients

Author: vidarl

src/DependencyInjection/Compiler/PurgeTypeSettingsPass.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace EzSystems\PlatformHttpCacheBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class PurgeTypeSettingsPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        $purgeType = $container->getParameter('ezpublish.http_cache.purge_type');
+        $purgeService = null;
+
+        $purgeClientServiceIds = $container->findTaggedServiceIds('ezplatform.http_cache.purge_client');
+        foreach ($purgeClientServiceIds as $purgeClientServiceId => $attributes) {
+            $hasPurgeTypeAttribute = false;
+            foreach ($attributes as $attribute) {
+                if (array_key_exists('purge_type', $attribute)) {
+                    $hasPurgeTypeAttribute = true;
+                    if ($purgeType === $attribute['purge_type']) {
+                        $purgeService = $purgeClientServiceId;
+                        break;
+                    }
+                }
+            }
+            if (!$hasPurgeTypeAttribute) {
+                throw new \InvalidArgumentException("Missing attribute 'purge_type' in tagged service '$purgeClientServiceId'.");
+            }
+        }
+
+        if ($purgeService ===  null) {
+            throw new \InvalidArgumentException("No driver found being able to handle purge_type '$purgeType'.");
+        }
+
+        $container->setAlias('ezplatform.http_cache.purge_client', $purgeService);
+    }
+}

src/EzSystemsPlatformHttpCacheBundle.php

@@ -4,6 +4,7 @@
 
 use EzSystems\PlatformHttpCacheBundle\DependencyInjection\Compiler\ResponseTaggersPass;
 use EzSystems\PlatformHttpCacheBundle\DependencyInjection\Compiler\KernelPass;
+use EzSystems\PlatformHttpCacheBundle\DependencyInjection\Compiler\PurgeTypeSettingsPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
@@ -15,5 +16,6 @@ public function build(ContainerBuilder $container)
 
         $container->addCompilerPass(new ResponseTaggersPass());
         $container->addCompilerPass(new KernelPass());
+        $container->addCompilerPass(new PurgeTypeSettingsPass());
     }
 }

src/Resources/config/services.yml

@@ -13,10 +13,14 @@ services:
     ezplatform.http_cache.purge_client.fos:
         class: EzSystems\PlatformHttpCacheBundle\PurgeClient\FOSPurgeClient
         arguments: ["@ezplatform.http_cache.cache_manager"]
+        tags:
+            - {name: ezplatform.http_cache.purge_client, purge_type: http}
 
     ezplatform.http_cache.purge_client.local:
         class: EzSystems\PlatformHttpCacheBundle\PurgeClient\LocalPurgeClient
         arguments: ["@ezplatform.http_cache.store"]
+        tags:
+            - {name: ezplatform.http_cache.purge_client, purge_type: local}
 
     ezplatform.http_cache.store:
         alias: ezplatform.http_cache.tag_aware_store