<?php

namespace models;

require_once('mt/Item.php');

use mt;
use phpcommon\SqlHelper;

class Bag extends BaseModel {

    public static function find($itemId)
    {
        $row = SqlHelper::ormSelectOne(
            myself()->_getSelfMysql(),
            't_bag',
            array(
                'account_id' => myself()->_getAccountId(),
                'item_id' => $itemId,
            )
        );
        return $row;
    }

    public static function toDto($row)
    {
        return array(
            'item_id' => $row['item_id'],
            'item_num' => $row['item_num'],
        );
    }

    public static function getItemCount($itemId)
    {
        $itemDb = self::find($itemId);
        return $itemDb ? $itemDb['item_count'] : 0;
    }

    public static function addItem($itemId, $itemNum)
    {
        if (myself()->_isVirtualItem($itemId)) {
            return;
        }
        $itemMeta = mt\Item::get($itemId);
        if (!$itemMeta) {
            return;
        }
        SqlHelper::upsert
            (myself()->_getSelfMysql(),
             't_bag',
             array(
                 'account_id' => myself()->_getAccountId(),
                 'item_id' => $itemId
             ),
             array(
                 'item_num' => function () use($itemNum) { return "item_num + {$itemNum}";},
                 'modifytime' => myself()->_getNowTime(),
             ),
             array(
                 'account_id' => myself()->_getAccountId(),
                 'item_id' => $itemId,
                 'item_num' => $itemNum,
                 'createtime' => myself()->_getNowTime(),
                 'modifytime' => myself()->_getNowTime()
             )
            );
    }

    public static function decItem($itemId, $itemNum)
    {
        SqlHelper::update
            (myself()->_getSelfMysql(),
             't_bag',
             array(
                 'account_id' => myself()->_getAccountId(),
                 'item_id' => $itemId,
             ),
             array(
                 'item_num' => function () use($itemNum) {
                     return "GREATEST(0, item_num - ${itemNum})";
                 },
                 'modifytime' => myself()->_getNowTime(),
             )
            );
    }

}