Refactor segment filter data to embedded object

[MAILPOET-3177]

lib/Entities/DynamicSegmentFilterData.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use MailPoetVendor\Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Embeddable()
+ */
+class DynamicSegmentFilterData {
+  const TYPE_USER_ROLE = 'userRole';
+  const TYPE_EMAIL = 'email';
+  const TYPE_WOOCOMMERCE = 'woocommerce';
+
+  /**
+   * @ORM\Column(type="serialized_array")
+   * @var array|null
+   */
+  private $filterData;
+
+  public function __construct(array $filterData) {
+    $this->filterData = $filterData;
+  }
+
+  public function getData(): ?array {
+    return $this->filterData;
+  }
+
+  /**
+   * @return mixed|null
+   */
+  public function getParam(string $name) {
+    return $this->filterData[$name] ?? null;
+  }
+
+  public function getFilterType(): ?string {
+    $filterData = $this->getData();
+    return $filterData['segmentType'] ?? null;
+  }
+}