Fix: Take service priority into account when registering providers in… (#1172)

* Fix: Take service priority into account when registering providers in compiler pass

* FIx empty array when no providers are defined

* Update RegisterProvidersPass.php

Author: GeoffroyR

DependencyInjection/Compiler/RegisterProvidersPass.php

@@ -30,7 +30,18 @@ public function process(ContainerBuilder $container)
         $registry = $container->getDefinition('fos_elastica.provider_registry');
         $providers = $container->findTaggedServiceIds('fos_elastica.provider');
 
-        foreach ($providers as $providerId => $tags) {
+        $providersByPriority = array();
+        foreach ($providers as $id => $attributes) {
+            $priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
+            $providersByPriority[$priority][$id] = $attributes;
+        }
+
+        if (!empty($providersByPriority)){
+            krsort($providersByPriority);
+            $providersByPriority = call_user_func_array('array_merge', $providersByPriority);
+        }
+            
+        foreach ($providersByPriority as $providerId => $tags) {
             $index = $type = null;
             $class = $container->getDefinition($providerId)->getClass();