base commit

app/Services/Leave/LeaveDaysCalculator.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Leave;
+
+use Carbon\Carbon;
+
+class LeaveDaysCalculator
+{
+    public function between(Carbon $start, Carbon $end): int
+    {
+        $startDate = $start->copy()->startOfDay();
+        $endDate = $end->copy()->startOfDay();
+
+        if ($endDate->lt($startDate)) {
+            return 0;
+        }
+
+        return match (config('hr.leave_calculation')) {
+            'business' => $this->businessDaysBetween($startDate, $endDate),
+            default => (int) ($startDate->diffInDays($endDate) + 1),
+        };
+    }
+
+    private function businessDaysBetween(Carbon $startDate, Carbon $endDate): int
+    {
+        $days = 0;
+        $current = $startDate->copy();
+
+        while ($current->lte($endDate)) {
+            if (! $current->isWeekend()) {
+                $days++;
+            }
+
+            $current->addDay();
+        }
+
+        return $days;
+    }
+}