[export] add a first export and first filters

- nationality aggregator (work in progress: we have to set the feature
  'group by continent')
- gender filter
- nationality filter
- gender filter

Export/Export/CountPerson.php

@@ -0,0 +1,79 @@
+<?php
+
+/*
+ * Copyright (C) 2015 Champs-Libres <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\PersonBundle\Export\Export;
+
+use Chill\MainBundle\Export\ExportInterface;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+
+/**
+ * 
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class CountPerson implements ExportInterface
+{
+    /**
+     * 
+     */
+    public function getType()
+    {
+        return 'person';
+    }
+    
+    public function getDescription()
+    {
+        return "Count persons by various parameters.";
+    }
+    
+    public function getTitle()
+    {
+        return "Count persons";
+    }
+    
+    /**
+     * Initiate the query
+     * 
+     * @param QueryBuilder $qb
+     * @return QueryBuilder
+     */
+    public function initiateQuery(QueryBuilder $qb, array $requiredModifiers)
+    {
+        $qb->select('COUNT(person.id) AS export_result')
+                ->from('ChillPersonBundle:Person', 'person')
+                ;
+        
+        return $qb;
+    }
+    
+    public function buildForm(FormBuilderInterface $builder) {
+        throw new \LogicException('This export does not require a form');
+    }
+    
+    public function hasForm(){
+        return false;
+    }
+    
+    public function supportsModifiers()
+    {
+        return array('person');
+    }
+    
+}