feast(services): add duration solver

2024-08-07 12:53:46 +02:00
parent 332d4b2dce
commit ef937530af
3 changed files with 148 additions and 0 deletions
--- a/app/Services/WorkingDays/DurationSolver.php
+++ b/app/Services/WorkingDays/DurationSolver.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\WorkingDays;
+
+use App\Services\Utils\DurationConvertor;
+
+/**
+ * Solves the duration of a given period based on working days and return new end date.
+ */
+class DurationSolver
+{
+    protected const int MAX_ITERATIONS = 100;
+
+    public function __construct(
+        protected readonly WorkingDayDeterminerInterface $workingDayDeterminer,
+        protected readonly DurationConvertor $durationConvertor,
+    ) {
+    }
+
+    /**
+     * Calculate the duration of a given period based on working days.
+     * @param \DateTimeImmutable $startDate
+     * @param \DateTimeImmutable $endDate
+     * @return \DateTimeImmutable
+     * @throws \Exception
+     */
+    public function calculateDuration(
+        \DateTimeImmutable $startDate,
+        \DateTimeImmutable $endDate,
+    ): \DateTimeImmutable {
+        $loopId = 0;
+        $requiredWorkingDaysCount = (int) ($startDate->setTime(0, 0)->diff($endDate->setTime(0, 0))->format('%a')) + 1;
+
+        do {
+            $workingDaysCount = (int) ($startDate->setTime(0, 0)->diff($endDate->setTime(0, 0))->format('%a')) + 1;
+            $workingDaysCountInInterval = $this->workingDayDeterminer->getWorkingDaysCount($startDate, $workingDaysCount);
+
+            if ($workingDaysCountInInterval >= $requiredWorkingDaysCount) {
+                // there is no weekends or holidays in the given interval
+                break;
+            } else {
+                $endDate = $endDate->add(new \DateInterval(sprintf('P%dD', $requiredWorkingDaysCount - $workingDaysCountInInterval)));
+                if ($loopId > static::MAX_ITERATIONS) {
+                    throw new \InvalidArgumentException('No working days found in the given interval');
+                }
+            }
+
+            $loopId++;
+        } while ($workingDaysCount != $workingDaysCountInInterval);
+
+        return $endDate;
+    }
+}