app/models/Setting.php

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<?php
require_once __DIR__ . '/../../core/BaseModel.php';

class Setting extends BaseModel {
    protected $table = 'settings';
    protected $fillable = ['key', 'value', 'type', 'group', 'description'];
    protected $primaryKey = 'id';
    protected $timestamps = true;
    
    private static $cache = null;
    
    public function getAllSettings() {
        if (self::$cache !== null) {
            return self::$cache;
        }
        
        $settings = $this->findAll();
        $result = [];
        
        foreach ($settings as $setting) {
            $value = $setting['value'];
            
            switch ($setting['type']) {
                case 'int':
                case 'integer':
                    $value = (int)$value;
                    break;
                case 'bool':
                case 'boolean':
                    $value = $value === '1' || $value === 'true';
                    break;
                case 'array':
                case 'json':
                    $value = json_decode($value, true);
                    break;
            }
            
            $result[$setting['key']] = $value;
        }
        
        self::$cache = $result;
        return $result;
    }
    
    public function get($key, $default = null) {
        $settings = $this->getAllSettings();
        return $settings[$key] ?? $default;
    }
    
    public function set($key, $value) {
        $setting = $this->findOneBy('key', $key);
        
        if (is_array($value)) {
            $value = json_encode($value, JSON_UNESCAPED_UNICODE);
            $type = 'json';
        } elseif (is_bool($value)) {
            $value = $value ? '1' : '0';
            $type = 'bool';
        } elseif (is_int($value)) {
            $type = 'int';