Merge branch 'main' into directory-refactor

# Conflicts:
#	app/Architecture/Providers/AppServiceProvider.php
#	app/Eloquent/Observers/YearPeriodObserver.php

app/Infrastructure/Http/Rules/YearPeriodExists.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Toby\Infrastructure\Http\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+use Illuminate\Support\Carbon;
+use Toby\Eloquent\Models\YearPeriod;
+
+class YearPeriodExists implements Rule
+{
+    public function passes($attribute, $value): bool
+    {
+        $yearPeriod = YearPeriod::findByYear(Carbon::create($value)->year);
+
+        return $yearPeriod !== null;
+    }
+
+    public function message(): string
+    {
+        return "The year period for given year doesn't exist.";
+    }
+}