<?php


/*
 * PreferencesSingleton.php
 * Copyright (c) 2025 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\Support\Singleton;

class PreferencesSingleton
{
    private static ?PreferencesSingleton $instance = null;

    private array $preferences                     = [];

    private function __construct()
    {
        // Private constructor to prevent direct instantiation.
    }

    public static function getInstance(): self
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    public function resetPreferences(): void
    {
        $this->preferences = [];
    }

    public function setPreference(string $key, mixed $value): void
    {
        $this->preferences[$key] = $value;
    }

    public function getPreference(string $key): mixed
    {
        return $this->preferences[$key] ?? null;
    }
}