command for sending bulk sms with tests

src/Bundle/ChillCalendarBundle/Service/ShortMessageNotification/CalendarForShortMessageProvider.php

@@ -0,0 +1,69 @@
+<?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\Service\ShortMessageNotification;
+
+use Chill\CalendarBundle\Entity\Calendar;
+use Chill\CalendarBundle\Repository\CalendarRepository;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+use function count;
+
+class CalendarForShortMessageProvider
+{
+    private CalendarRepository $calendarRepository;
+
+    private EntityManagerInterface $em;
+
+    private RangeGeneratorInterface $rangeGenerator;
+
+    public function __construct(
+        CalendarRepository $calendarRepository,
+        EntityManagerInterface $em,
+        RangeGeneratorInterface $rangeGenerator
+    ) {
+        $this->calendarRepository = $calendarRepository;
+        $this->em = $em;
+        $this->rangeGenerator = $rangeGenerator;
+    }
+
+    /**
+     * Generate calendars instance.
+     *
+     * Warning: this method takes care of clearing the EntityManager at regular interval
+     *
+     * @return iterable|Calendar[]
+     */
+    public function getCalendars(DateTimeImmutable $at): iterable
+    {
+        ['startDate' => $startDate, 'endDate' => $endDate] = $this->rangeGenerator
+            ->generateRange($at);
+
+        $offset = 0;
+        $batchSize = 10;
+
+        $calendars = $this->calendarRepository
+            ->findByNotificationAvailable($startDate, $endDate, $batchSize, $offset);
+
+        do {
+            foreach ($calendars as $calendar) {
+                ++$offset;
+
+                yield $calendar;
+            }
+
+            $this->em->clear();
+
+            $calendars = $this->calendarRepository
+                ->findByNotificationAvailable($startDate, $endDate, $batchSize, $offset);
+        } while (count($calendars) === $batchSize);
+    }
+}