exports: add a new GeographicalUnitStat aggregator

src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/GeographicalUnitStatAggregator.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+
+final class GeographicalUnitStatAggregator implements AggregatorInterface
+{
+    /*
+    private EntityRepository $repository;
+
+    public function __construct(
+        EntityManagerInterface $em
+    ) {
+        $this->repository = $em->getRepository(...::class);
+    }
+    */
+
+    /**
+     * @inheritDoc
+     */
+    public function getLabels($key, array $values, $data)
+    {
+        return function ($value): string {
+            if ('_header' === $value) {
+                return 'Geographical unit';
+            }
+
+            $g = $this->repository->find($value);
+
+            return $g; //...
+        };
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getQueryKeys($data): array
+    {
+        return ['geographicalunitstat_aggregator'];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        // TODO: Implement buildForm() method.
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getTitle(): string
+    {
+        return 'Group by geographical unit';
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function addRole()
+    {
+        return null;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+
+        //$qb->addSelect('... AS geographicalunitstat_aggregator');
+
+        $groupby = $qb->getDQLPart('groupBy');
+
+        if (!empty($groupBy)) {
+            $qb->addGroupBy('geographicalunitstat_aggregator');
+        } else {
+            $qb->groupBy('geographicalunitstat_aggregator');
+        }
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function applyOn(): string
+    {
+        return Declarations::ACP_TYPE;
+    }
+}