first indicator for calendar exports

src/Bundle/ChillCalendarBundle/Export/Declarations.php

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+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\CalendarBundle\Export;
+
+/**
+ * This class declare constants used for the export framework.
+ */
+abstract class Declarations
+{
+    public const CALENDAR_TYPE = 'calendar';
+}

src/Bundle/ChillCalendarBundle/Export/Export/CountAppointments.php

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+<?php
+
+namespace Chill\CalendarBundle\Export\Export;
+
+use Chill\CalendarBundle\Repository\CalendarRepository;
+use Chill\MainBundle\Export\ExportInterface;
+use Chill\MainBundle\Export\FormatterInterface;
+use Chill\MainBundle\Export\GroupedExportInterface;
+use Chill\CalendarBundle\Export\Declarations;
+use Chill\PersonBundle\Security\Authorization\PersonVoter;
+use Doctrine\ORM\AbstractQuery;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Process\Exception\LogicException;
+use Symfony\Component\Security\Core\Role\Role;
+
+class CountAppointments implements ExportInterface, GroupedExportInterface
+{
+
+    private CalendarRepository $calendarRepository;
+
+    public function __construct(CalendarRepository $calendarRepository)
+    {
+        $this->calendarRepository = $calendarRepository;
+    }
+
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        // No form necessary
+    }
+
+    public function getAllowedFormattersTypes(): array
+    {
+        return [FormatterInterface::TYPE_TABULAR];
+    }
+
+    public function getDescription(): string
+    {
+        return 'Count appointments by various parameters.';
+    }
+
+    public function getLabels($key, array $values, $data): \Closure
+    {
+        if ('export_result' !== $key) {
+            throw new LogicException("the key {$key} is not used by this export");
+        }
+
+        $labels = array_combine($values, $values);
+        $labels['_header'] = $this->getTitle();
+
+        return static function ($value) use ($labels) {
+            return $labels[$value];
+        };
+    }
+
+    public function getQueryKeys($data): array
+    {
+        return ['export_result'];
+    }
+
+    public function getResult($qb, $data)
+    {
+        return $qb->getQuery()->getResult(AbstractQuery::HYDRATE_SCALAR);
+    }
+
+    public function getTitle(): string
+    {
+        return 'Count appointments';
+    }
+
+    public function getType(): string
+    {
+        return Declarations::CALENDAR_TYPE;
+    }
+
+    /**
+     * Initiate the query.
+     */
+    public function initiateQuery(array $requiredModifiers, array $acl, array $data = []): QueryBuilder
+    {
+        $centers = array_map(static function ($el) {
+            return $el['center'];
+        }, $acl);
+
+        $qb = $this->calendarRepository->createQueryBuilder('appointment');
+
+        $qb->select('COUNT(appointment.id) AS export_result');
+
+        return $qb;
+    }
+
+    public function requiredRole(): Role
+    {
+
+        // which role should we give here?
+        return new Role(PersonVoter::STATS);
+    }
+
+    public function supportsModifiers(): array
+    {
+        return [
+            Declarations::CALENDAR_TYPE,
+        ];
+    }
+
+    public function getGroup(): string
+    {
+        return 'Exports of calendar';
+    }
+
+}