add doublemetaphone function and config to enable-disable usage of double metaphone

Controller/PersonController.php

@@ -101,14 +101,25 @@ class PersonController extends Controller {
         $offset = $this->getRequest()->query->getInt('offet', 0);
         $limit = $this->getRequest()->query->getInt('limit', 30);
         
-        $persons = $em->createQuery('SELECT p FROM CLChillPersonBundle:Person p'
-                . ' WHERE LOWER(p.name) like LOWER(:q) OR LOWER(p.surname) '
-                . ' like LOWER(:q) ')
-                ->setParameter('q', '%'.$q.'%')
+        $dql = 'SELECT p FROM CLChillPersonBundle:Person p'
+                . ' WHERE'
+                . ' LOWER(p.name) like LOWER(:q)'
+                . ' OR LOWER(p.surname)  like LOWER(:q)';
+        
+        if ($this->container->getParameter('cl_chill_person.search.use_double_metaphone')) {
+            $dql .= ' OR DOUBLEMETAPHONE(p.name) = DOUBLEMETAPHONE(:qabsolute)';
+        }
+
+        
+        $query = $em->createQuery($dql)
+                ->setParameter('q', '%'.$q.'%');
+        if ($this->container->getParameter('cl_chill_person.search.use_double_metaphone')) {
+            $query->setParameter('qabsolute', $q);
+        }
+                
               //  ->setOffset($offset)
               //  ->setLimit($limit)
-                ->getResult()
-                ;
+        $persons = $query->getResult() ;
         
         
         if (count($persons) === 0 ){

DependencyInjection/CLChillPersonExtension.php

@@ -21,6 +21,9 @@ class CLChillPersonExtension extends Extension
     {
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
+        
+        $container->setParameter('cl_chill_person.search.use_double_metaphone', 
+                $config['search']['use_double_metaphone']);
 
         $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yml');

DependencyInjection/Configuration.php

@@ -19,6 +19,18 @@ class Configuration implements ConfigurationInterface
     {
         $treeBuilder = new TreeBuilder();
         $rootNode = $treeBuilder->root('cl_chill_person');
+        
+        $rootNode
+                ->canBeDisabled()
+                ->children()
+                ->arrayNode('search')
+                    ->canBeDisabled()
+                        ->children()
+                        ->booleanNode('use_double_metaphone')
+                            ->defaultFalse()
+                            ->end()
+                        ->booleanNode('use_trigrams')->defaultFalse()->end();
+                
 
         // Here you should define the parameters that are allowed to
         // configure your bundle. See the documentation linked above for