<?php

namespace App\Helpers;

use App\Models\Settings as SettingsModel;

/**
 * Class Settings
 *
 * Helper class for easier obtaining system settings
 *
 * @package App\Helpers
 */
class Settings
{
    /**
     * @var array List of all used settings
     */
    protected static $settings;
    /**
     * @var bool Are data already initialized?
     */
    protected static $initialized = false;

    /**
     * Getter for settings determined with key.
     *
     * @param string      $key     settings key
     * @param string|null $default default value, which will be returned when given key does not exist
     *
     * @param null        $exists
     *
     * @return null|string
     */
    public static function get($key, $default = null, & $exists = null)
    {
        self::init();

        if (isset(self::$settings->$key)) {
            $exists = true;
            self::$initialized = true;
            return self::$settings->$key;
        }

        $exists = false;
        return $default;
    }

    /**
     * Shortcut for obtaining settings saved as JSON
     *
     * @param $key
     *
     * @return mixed
     */
    public static function getJson($key)
    {
        return json_decode(self::get($key, '{}'));
    }

    /**
     * Get all settings
     *
     * @return array
     */
    public static function all()
    {
        self::init();

        return self::$settings;
    }

    /**
     * Initialize settings array
     */
    private static function init()
    {
        if (!self::$initialized) {
            $model = new SettingsModel();
            self::$settings = $model->getAll();
        }
    }
}