api/app/Http/Controllers/Admin/ConfigController.php

<?php

namespace App\Http\Controllers\Admin;

use App\Constants\HttpStatus;
use App\Http\Controllers\Controller;
use App\Models\Config;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;
use Exception;

class ConfigController extends Controller
{

    function update()
    {
        DB::beginTransaction();
        try {
            $fields = Config::pluck('field')->toArray();
            $fields = implode(',', $fields);
            $validate = ['field' => ['required', 'string', "in:{$fields}"]];
            request()->validate($validate);
            $field = request()->input('field');
            $config = Config::where('field', $field)->first();
            $validate = array_merge($validate, $config->getRule());
            $params = request()->validate($validate);
            $config->val = $params['val'];
            $config->save();
            DB::commit();
        } catch (ValidationException $e) {
            DB::rollBack();
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->validator->errors()->first());
        } catch (Exception $e) {
            DB::rollBack();
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->getMessage());
        }
        return $this->success();
    }

    function index()
    {
        try {
            request()->validate([
                'page' => ['nullable', 'integer', 'min:1'],
                'limit' => ['nullable', 'integer', 'min:1'],
                'field' => ['nullable', 'string'],
            ]);
            $page = request()->input('page', 1);
            $limit = request()->input('limit', 15);
            $field = request()->input('field', '');
            $query = Config::query();
            $query = $query->where('group_id', Config::GROUP_BASIC);
            if (!empty($field)) $query = $query->where($field, $field);
            $data['total'] = $query->count();
            $data['data'] = $query->forPage($page, $limit)->get();
        } catch (ValidationException $e) {
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->validator->errors()->first());
        } catch (Exception $e) {
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->getMessage());
        }
        return $this->success($data);
    }
}