#28 - holidays management (#30)

* #28 - holidays management

* #28 - fix

* #28 - fix

* #28 - fix

* #28 - fix

* #28 - fix

* #28 - fix

* #28 - cr fix

app/Helpers/PolishHolidaysRetriever.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Toby\Helpers;
+
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Collection;
+use Toby\Models\YearPeriod;
+use Yasumi\Holiday;
+use Yasumi\Yasumi;
+
+class PolishHolidaysRetriever
+{
+    protected const PROVIDER_KEY = "Poland";
+    protected const LANG_KEY = "pl";
+
+    public function getForYearPeriod(YearPeriod $yearPeriod): Collection
+    {
+        $polishProvider = Yasumi::create(static::PROVIDER_KEY, $yearPeriod->year);
+
+        $holidays = $polishProvider->getHolidays();
+
+        return $this->prepareHolidays($holidays);
+    }
+
+    protected function prepareHolidays(array $holidays): Collection
+    {
+        return collect($holidays)->map(fn(Holiday $holiday) => [
+            "name" => $holiday->getName([static::LANG_KEY]),
+            "date" => Carbon::createFromTimestamp($holiday->getTimestamp()),
+        ])->values();
+    }
+}