feat : ajout des suspensions et des jours de présence

src/Service/Leave/SuspensionDaysCalculator.php

@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service\Leave;
+
+use App\Entity\ContractSuspension;
+use DateTimeImmutable;
+
+final class SuspensionDaysCalculator
+{
+    /**
+     * Count calendar days suspended within a month window [monthStart, monthEnd].
+     *
+     * @param list<ContractSuspension> $suspensions
+     */
+    public function countSuspendedDaysInMonth(
+        DateTimeImmutable $monthStart,
+        DateTimeImmutable $monthEnd,
+        array $suspensions
+    ): int {
+        $total = 0;
+
+        foreach ($suspensions as $suspension) {
+            $sStart = $suspension->getStartDate();
+            $sEnd   = $suspension->getEndDate() ?? $monthEnd;
+
+            $overlapStart = $sStart > $monthStart ? $sStart : $monthStart;
+            $overlapEnd   = $sEnd < $monthEnd ? $sEnd : $monthEnd;
+
+            if ($overlapStart > $overlapEnd) {
+                continue;
+            }
+
+            $total += ((int) $overlapEnd->diff($overlapStart)->format('%a')) + 1;
+        }
+
+        return $total;
+    }
+
+    /**
+     * Count business days (Mon-Fri, excl. public holidays) suspended within a period.
+     *
+     * @param list<ContractSuspension> $suspensions
+     * @param array<string, string>    $publicHolidays map of Y-m-d => label
+     */
+    public function countSuspendedBusinessDays(
+        DateTimeImmutable $periodStart,
+        DateTimeImmutable $periodEnd,
+        array $suspensions,
+        array $publicHolidays
+    ): int {
+        $total = 0;
+
+        foreach ($suspensions as $suspension) {
+            $sStart = $suspension->getStartDate();
+            $sEnd   = $suspension->getEndDate() ?? $periodEnd;
+
+            $overlapStart = $sStart > $periodStart ? $sStart : $periodStart;
+            $overlapEnd   = $sEnd < $periodEnd ? $sEnd : $periodEnd;
+
+            if ($overlapStart > $overlapEnd) {
+                continue;
+            }
+
+            for ($cursor = $overlapStart; $cursor <= $overlapEnd; $cursor = $cursor->modify('+1 day')) {
+                $weekDay = (int) $cursor->format('N');
+                $dayKey  = $cursor->format('Y-m-d');
+                if ($weekDay <= 5 && !isset($publicHolidays[$dayKey])) {
+                    ++$total;
+                }
+            }
+        }
+
+        return $total;
+    }
+}