Refactor api for creating/updating dynamic segments

[MAILPOET-3177]

lib/Segments/DynamicSegments/SegmentSaveController.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace MailPoet\Segments\DynamicSegments;
+
+use InvalidArgumentException;
+use MailPoet\Entities\SegmentEntity;
+use MailPoet\Segments\SegmentsRepository;
+
+class SegmentSaveController {
+  /** @var SegmentsRepository */
+  private $segmentsRepository;
+
+  /** @var FilterDataMapper */
+  private $filterDataMapper;
+
+  public function __construct(
+    SegmentsRepository $segmentsRepository,
+    FilterDataMapper $filterDataMapper
+  ) {
+    $this->segmentsRepository = $segmentsRepository;
+    $this->filterDataMapper = $filterDataMapper;
+  }
+
+  public function save(array $data = []): SegmentEntity {
+    $id = isset($data['id']) ? (int)$data['id'] : null;
+    $name = $data['name'] ?? '';
+    $description = $data['description'] ?? '';
+    $filterData = $this->filterDataMapper->map($data);
+
+    $this->checkSegmentUniqueName($name, $id);
+
+    return $this->segmentsRepository->createOrUpdate($name, $description, SegmentEntity::TYPE_DYNAMIC, $filterData, $id);
+  }
+
+  private function checkSegmentUniqueName(string $name, ?int $id): void {
+    if (!$this->segmentsRepository->isNameUnique($name, $id)) {
+      throw new InvalidArgumentException("Segment with name: '{$name}' already exists.");
+    }
+  }
+}