<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Setting extends Model
{
    protected $fillable = ['key', 'value', 'group'];

    /**
     * 读取设置值，未设置时返回默认值。
     */
    public static function get(string $key, ?string $default = null): ?string
    {
        $row = static::where('key', $key)->first();
        if (!$row) {
            return $default;
        }
        return $row->value;
    }

    /**
     * 写入或更新设置值。
     */
    public static function set(string $key, ?string $value, string $group = 'general'): void
    {
        static::updateOrCreate(
            ['key' => $key],
            ['value' => $value, 'group' => $group]
        );
    }
}