Added Pagination Service class

Pagination is going to need some additional features in the near future,
so it made sense to give it it's own seperate class.

app/Services/PaginationService.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Location;
+
+class PaginationService
+{
+    protected $location;
+    protected $limit = 15;
+
+    public function __construct(
+        Location $location,
+    ) {
+        $this->location = $location;
+    }
+
+    public function getPage($pageNum)
+    {
+        $range     = $pageNum * $this->limit - $this->limit;
+        $active    = $this->location::where("active", true)->where('actions_count', '>=', 2)->get();
+        $locations = $this->location::where("active", true)->where('actions_count', '>=', 2)
+            ->limit($this->limit)->offset($range)->orderBy('id', 'asc')->get();
+        $pageCount = ceil(count($active) / $this->limit);
+
+        $next = $pageNum + 1;
+        if ($next > $pageCount) {
+            $next = 1;
+        }
+
+        $prev = $pageNum - 1;
+
+        if ($prev <= 0) {
+            $prev = $pageCount;
+        }
+
+        return $result = [
+            'locations' => $locations,
+            'pageCount' => $pageCount,
+            'prev'      => $prev,
+            'next'      => $next];
+    }
+}