<?php

namespace App\Cache\Base;

//用户缓存用户基础信息（等于数据表）primary_key为主键
abstract class TableBaseCache extends BaseCache
{
    public string $table_class;
    public string $primary_key_column = 'uid';
    public array $get_columns = ['*'];
    public array $get_exclude_columns = [];

    function loadTable(): array|string|null
    {
        return null;
    }

    function loadData(): array|string|null
    {
        //默认获取表数据方式
        if (!empty($table_class)) {
            $oTable = new $this->table_class();
            //排除不需要的字段
            if (!empty($this->get_exclude_columns) && $this->get_columns != ['*']) $this->get_columns = array_diff($this->get_columns, $this->get_exclude_columns);
            $oData = $oTable->findItemByWhere([$this->primary_key_column => $this->primary_key], $this->get_columns);
            if ($oData->isEmpty()) return null;
            $aData = $oData->toArray();
            //排除不需要的字段
            if (!empty($this->get_exclude_columns) && $this->get_columns == ['*'] && !empty($aData)) {
                foreach ($this->get_exclude_columns as $sColumn) {
                    unset($aData[$sColumn]);
                }
            }

            if (empty($aData)) return null;
            return $aData;
        } else {
            return $this->loadTable();
        }
    }


}