Added DTO used to pass filtering params to VisitsTracker

module/Core/src/Model/VisitsParams.php

@@ -0,0 +1,43 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\Model;
+
+use Shlinkio\Shlink\Common\Util\DateRange;
+
+final class VisitsParams
+{
+    /** @var null|DateRange */
+    private $dateRange;
+    /** @var int */
+    private $page = 1;
+    /** @var null|int */
+    private $itemsPerPage;
+
+    public function __construct(?DateRange $dateRange = null, int $page = 1, ?int $itemsPerPage = null)
+    {
+        $this->dateRange = $dateRange ?? new DateRange();
+        $this->page = $page;
+        $this->itemsPerPage = $itemsPerPage;
+    }
+
+    public function getDateRange(): DateRange
+    {
+        return $this->dateRange;
+    }
+
+    public function getPage(): int
+    {
+        return $this->page;
+    }
+
+    public function getItemsPerPage(): ?int
+    {
+        return $this->itemsPerPage;
+    }
+
+    public function hasItemsPerPage(): bool
+    {
+        return $this->itemsPerPage !== null;
+    }
+}