qimall/backend/modules/common/services/BaseService.php

<?php

namespace backend\modules\common\services;

use yii\base\BaseObject;
use yii\db\ActiveRecord;

/**
 * BaseService
 * @package backend\modules\common\services
 */
class BaseService extends BaseObject
{
    /**
     * Error
     *
     * @var string
     */
    public $error;

    /**
     * 初始化
     *
     * @param array $config
     */
    public function __construct($config)
    {
        parent::__construct($config);
    }

    /**
     * @param array $params
     * @param string $field
     * @return integer
     */
    public function getPage(array $params, string $field = 'page') :int
    {
        return !empty($params[$field])
            ? $params[$field]
            : 1;
    }

    /**
     * @param array $params
     * @param string $field
     * @return integer
     */
    public function getLimit(array $params, string $field = 'limit') :int
    {
        return !empty($params[$field])
            ? $params[$field]
            : 20;
    }

    /**
     * 错误返回
     *
     * @param string $msg
     * @return false
     */
    public function error($msg = '')
    {
        $this->error = $msg;
        return false;
    }

    /**
     * model error
     *
     * @param ActiveRecord $model
     * @return false
     */
    public function modelError(ActiveRecord $model)
    {
        $error_msg = current($model->getFirstErrors());

        return $this->error(
            $error_msg
        );
    }

    /**
     * 返回错误信息
     *
     * @return string
     */
    public function getError()
    {
        return $this->error;
    }
}