dreamland/app/collection/lib/Buy.php

<?php

namespace Collection\Lib;

use Dever;

class Buy
{

    private function getOne($info)
    {
        if (!is_array($info)) {
            $info = Dever::db('collection/buy')->one($info);
        }

        return $info;
    }

    public function getInfo($info)
    {
        $info['name'] = $this->getName($info);
        $info['price'] = $this->getPrice($info);
        return $info;
    }

    public function getName($info)
    {
        $info = $this->getOne($info);
        if ($info && $info['name']) {
            return $info['name'];
        } else {
            $collection = Dever::db('collection/info')->one($info['info_id']);
            return '购买' . $info['num'] . $collection['unit'];
        }
    }

    public function getPrice($info)
    {
        $info = $this->getOne($info);

        $collection = Dever::db('collection/info')->one($info['info_id']);
        if ($info['price'] > 0) {
            return $info['price'];
        } else {
            return $info['num'] * $collection['buy_price'];
        }
    }

    public function getPriceName($info)
    {
        $price = $this->getPrice($info);

        return $price . '元';
    }
}