feat(controller): add post lists controller

src/Utils/Paginator/Paginator.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Utils\Paginator;
+
+class Paginator
+{
+    /**
+     * Determinate which pages are visible in the paginator
+     * @param int $page
+     * @param int $totalPages
+     * @param int $maxVisiblePages
+     * @return PaginatorResult
+     */
+    public function getVisiblePages(int $page, int $totalPages, int $maxVisiblePages): PaginatorResult
+    {
+        $half = floor($maxVisiblePages / 2);
+
+        if ($page <= $half) {
+            $start = 1;
+            $end = min($totalPages, $maxVisiblePages);
+        } elseif ($page > $totalPages - $half) {
+            $start = max(1, $totalPages - $maxVisiblePages + 1);
+            $end = $totalPages;
+        } else {
+            $start = $page - $half;
+            $end = min($totalPages, $page + $half);
+        }
+
+        /**
+         * @var array<int> $range
+         */
+        $range = range($start, $end);
+
+        return new PaginatorResult(
+            $page,
+            $start == 1,
+            $end == $totalPages,
+            $totalPages,
+            $totalPages,
+            $range
+        );
+    }
+}