Refactor phpstan errors.

app/Exceptions/IntervalException.php

@@ -0,0 +1,75 @@
+<?php
+
+
+/*
+ * IntervalException.php
+ * Copyright (c) 2023 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Exceptions;
+
+use Exception;
+use FireflyIII\Support\Calendar\Periodicity;
+use Throwable;
+
+/**
+ * Class IntervalException
+ */
+final class IntervalException extends Exception
+{
+
+    public readonly array       $availableIntervals;
+    public readonly Periodicity $periodicity;
+    protected                   $message = 'The periodicity %s is unknown. Choose one of available periodicity: %s';
+
+    public function __construct(string $message = "", int $code = 0, ?Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+        $this->availableIntervals = [];
+        $this->periodicity        = Periodicity::Monthly;
+    }
+
+    /**
+     * @param Periodicity    $periodicity
+     * @param array          $intervals
+     * @param int            $code
+     * @param Throwable|null $previous
+     *
+     * @return IntervalException
+     */
+    public static function unavailable(
+        Periodicity $periodicity,
+        array       $intervals,
+        int         $code = 0,
+        ?Throwable  $previous = null
+    ): IntervalException
+    {
+        $message = sprintf(
+            'The periodicity %s is unknown. Choose one of available periodicity: %s',
+            $periodicity->name,
+            join(', ', $intervals)
+        );
+
+        $exception                     = new IntervalException($message, $code, $previous);
+        $exception->periodicity        = $periodicity;
+        $exception->availableIntervals = $intervals;
+        return $exception;
+    }
+}