xyzshop/helper/room/bargain_manager.php

<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 2018/1/23
 * Time: 上午11:24
 */

namespace room;

class room_extend
{
    private $mParams;
    public function __construct($params)
    {
        $this->mParams = $params;
    }

    public function bargain_count($dateid)
    {
        if($this->dateid() != $dateid) {
            return 0;
        }

        if(empty($this->mParams)) {
            return 0;
        }
        else {
            return intval($this->mParams['bargain_count']);
        }
    }

    public function dateid()
    {
        if(empty($this->mParams)) {
            return 0;
        }
        else {
            return intval($this->mParams['dateid']);
        }
    }
    public function date_empty($dateid)
    {
        if(empty($this->mParams)) return true;
        if($this->dateid() == $dateid) {
            return false;
        }
        else {
            return false;
        }
    }
}

class bargain_parameter
{
    private $total_num;
    private $mRandom;
    private $total_amount;

    private $discount;
    private $closed;
    private $over_time;
    private $user_num;

    public function __construct(bargain $bargain)
    {
        $amount = $bargain->goods_price() - $bargain->lowest_price();
        $this->total_amount = intval($amount * 100 + 0.5);
        $this->mRandom = $bargain->random();
        $this->total_num = $bargain->total_num();
        $this->discount = intval($bargain->discount() * 100 + 0.5);
        $this->closed = $bargain->closed();
        $this->over_time = $bargain->over_time();
        $this->user_num = $bargain->user_num();
    }

    public function overed()
    {
        if($this->closed) return true;
        if($this->over_time <= time()) return true;

        return $this->completed();
    }

    private function completed() {
        return ($this->total_amount <= $this->discount);
    }

    public function bargain($count)
    {
        $value = $this->power($count);
        if($value === false) return false;

        if($this->discount + $value > $this->total_amount) {
            $value = $this->total_amount - $this->discount;
        }

        $this->discount += $value;
        $this->user_num += 1;

        return $value / 100;
    }

    private function power($count)
    {
        $average = intval($this->total_amount / $this->total_num + 0.5);
        if($this->mRandom)
        {
            $max_average = $average / pow(2,$count - 1);
            $max_average = intval($max_average + 0.5);

            return intval(mt_rand(1,$max_average));
        }
        else
        {
            global $config;
            $max_day_count = $config['bargain_goods']['max_day_count'];
            if($count >= $max_day_count) {
                return false;
            } else {
                return $average;
            }
        }
    }
    public function discount() {
        return $this->discount / 100;
    }
    public function user_num() {
        return $this->user_num;
    }
}

class bargain_manager
{
    private $mDateId;
    private $mFriends;
    private $mParams;
    private $mBargainId;
    private $mRoomId;

    public function __construct($roomid)
    {
        $this->mRoomId = $roomid;
        $this->mDateId = strtotime(date('Y-m-d',time()));
        $mod_bargain = Model('room_bargain');
        $info = $mod_bargain->getBargainByRoom($roomid,true);
        $bargain = new bargain($info);
        $this->mBargainId = $bargain->bargain_id();
        $this->mParams = new bargain_parameter($bargain);

        $this->mFriends = [];
        $mod_room = Model('room');
        $items = $mod_room->getRoomMsg($roomid,proto_type::msg_type_bargain);
        foreach ($items as $item) {
            $uid = intval($item['member_id']);
            $data = json_decode($item['msg'],true);
            $value = $data['value'];
            $this->mFriends[$uid] = $value;
        }
    }

    public function bargain($userid)
    {
        $value = $this->bargained($userid);
        if($value != false) {
            return ['value' => $value,'success' => false,'discount' => $this->mParams->discount(),'user_num' => $this->mParams->user_num()];
        }
        if($this->mParams->overed()) {
            return ['value' => 0,'success' => false,'discount' => $this->mParams->discount(),'user_num' => $this->mParams->user_num()];
        }

        $mod_room = Model('room');
        $info = $mod_room->getRoomExtend($userid);

        $room_extend = new room_extend($info);
        $count = $room_extend->bargain_count($this->mDateId);
        $value = $this->mParams->bargain($count);
        if($value === false) {
            return false;
        }
        else
        {
            if(!$room_extend->date_empty($this->mDateId)) {
                $mod_room->editExtend($userid,['bargain_count' => ['exp', 'bargain_count+1']]);
            } else {
                $mod_room->addExtend($userid,['bargain_count' => 1,'dateid' => $this->mDateId]);
            }
            $mod_bargain = Model('room_bargain');
            $mod_bargain->editBargain($this->mBargainId,['discount' => ['exp',"discount+{$value}"],'user_num' => ['exp',"user_num+1"]]);
            $mod_room->addRoomMsg(['room_id' => $this->mRoomId,'member_id' => $userid, 'type' => proto_type::msg_type_bargain,'msg' => json_encode(['value' => $value]),'add_time' => time()]);
            return ['value' => $value,'success' => true,'discount' => $this->mParams->discount(),'user_num' => $this->mParams->user_num()];
        }
    }

    private function bargained($userid)
    {
        if(array_key_exists($userid,$this->mFriends)) {
            return $this->mFriends[$userid];
        } else {
            return false;
        }
    }
}