Add SegmentsResponseBuilder used in Segments::get()

[MAILPOET-3166]

lib/API/JSON/ResponseBuilders/SegmentsResponseBuilder.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace MailPoet\API\JSON\ResponseBuilders;
+
+use MailPoet\Entities\SegmentEntity;
+
+class SegmentsResponseBuilder {
+  const DATE_FORMAT = 'Y-m-d H:i:s';
+
+  /**
+   * @return array
+   */
+  public function build(SegmentEntity $segment) {
+    return [
+      'id' => (string)$segment->getId(), // (string) for BC
+      'name' => $segment->getName(),
+      'type' => $segment->getType(),
+      'description' => $segment->getDescription(),
+      'created_at' => $segment->getCreatedAt()->format(self::DATE_FORMAT),
+      'updated_at' => $segment->getUpdatedAt()->format(self::DATE_FORMAT),
+      'deleted_at' => ($deletedAt = $segment->getDeletedAt()) ? $deletedAt->format(self::DATE_FORMAT) : null,
+    ];
+  }
+}