weiphp 刮刮卡控制器代码2

<?php

        // 权限判断
        unset ( $map );        //释放变量
        $map ['token'] = get_token ();        //设置数组token值
        $map ['openid'] = get_openid ();        //设置数组openid值
        $follow = M ( 'follow' )->where ( $map )->find ();        //查表
        $is_admin = is_login ();    //使用判断是否登陆方法
        $error = '';
        if ($data ['end_time'] <= time ()) {
            $error = '活动已结束';
        } else if ($data ['max_num'] > 0 && $data ['max_num'] <= $my_count) {        //控制抽奖次数
            $error = '您的刮卡机会已用完啦';
        } else if ($data ['follower_condtion'] > intval ( $follow ['status'] ) && ! $is_admin) {    //判断领取人权限
            switch ($data ['follower_condtion']) {
                case 1 :
                    $error = '关注后才能参与';
                    break;
                case 2 :
                    $error = '用户绑定后才能参与';
                    break;
                case 3 :
                    $error = '领取会员卡后才能参与';
                    break;
            }
        } else if ($data ['credit_conditon'] > intval ( $follow ['score'] ) && ! $is_admin) {        //判断领取人财富值
            $error = '您的财富值不足';
        } else if ($data ['credit_bug'] > intval ( $follow ['score'] ) && ! $is_admin) {
            $error = '您的财富值不够扣除';
        } else if (! empty ( $data ['addon_condition'] )) {
            addon_condition_check ( $data ['addon_condition'] ) || $error = '您没权限参与';
        }
        $this->assign ( 'error', $error );
        // 抽奖算法
        empty ( $error ) && $this->_lottery ( $data, $prizes, $new_prizes, $my_count, $has, $no_count );
        
        $this->display ( 'show' );
    }
    
    
    // 抽奖算法 中奖概率 = 奖品总数/(预估活动人数*每人抽奖次数)
    function _lottery($data, $prizes, $new_prizes, $my_count = 0, $has = array(), $no_count = 0) {
        $max_num = empty ( $data ['max_num'] ) ? 1 : $data ['max_num'];
        $count = $data ['predict_num'] * $max_num; // 总基数

        foreach ( $prizes as $p ) {        // 获取已经中过的奖
            $prizesArr [$p ['id']] = $p;
            
            $prize_num = $p ['num'] - $has [$p ['id']];        //剩余中奖数
            for($i = 0; $i < $prize_num; $i ++) {
                $rand [] = $p ['id']; // 中奖的记录，同时通过ID可以知道中的是哪个奖
            }
        }
        // dump ( $rand );
        // dump ( $prizesArr );
        
        if ($data ['predict_num'] != 1) {
            $remain = $count - count ( $rand ) - $no_count;
            $remain > 5000 && $remain = 5000; // 防止数组过大导致内存溢出
            for($i = 0; $i < $remain; $i ++) {
                $rand [] = 0; // 不中奖的记录
            }
        }
        if (empty ( $rand )) {
            $rand [] = - 1;
        }
        
        shuffle ( $rand ); // 所有记录随机排序
        $prize_id = $rand [0]; // 第一个记录作为当前用户的中奖记录
        $prize = array ();
        
        if ($prize_id > 0) {        //判断中奖情况
            $prize = $prizesArr [$prize_id];
        } elseif ($prize_id == - 1) {
            $prize ['id'] = 0;
            $prize ['title'] = '奖品已抽完';
        } else {
            $prize ['id'] = 0;
            $prize ['title'] = '谢谢参与';
        }

        // 获取我的抽奖机会
        if (empty ( $data ['max_num'] )) {
            $prize ['count'] = 1;
        } else {
            $prize ['count'] = $max_num - $my_count - 1;
            $prize ['count'] < 0 && $prize ['count'] = 0;
        }
        
//         dump ( $prize );
        $this->assign ( 'prize', $prize );
    }
    
    // 记录中奖数据到数据库
    function set_sn_code() {
        //设置数据数组
        $data ['sn'] = uniqid ();
        $data ['uid'] = $this->mid;
        $data ['cTime'] = time ();
        $data ['addon'] = 'Scratch';
        $data ['target_id'] = I ( 'id' );
        
        $data ['prize_id'] = $map ['id'] = I ( 'prize_id' );
        
        $title = '';
        if (! empty ( $map ['id'] )) {    //确定奖品标题
            $title = M ( 'prize' )->where ( $map )->getField ( 'title' );
            $title || $title = '';
        }
        $data ['prize_title'] = $title;
        // dump ( $data );
        
        $res = M ( 'sn_code' )->add ( $data );    //添加sn码
        if ($res) {
            // 更新获取数
            M ( "scratch" )->where ( 'id=' . $data ['target_id'] )->setInc ( "collect_count" );
            
            // 扣除积分
            $data = M ( 'scratch' )->find ( $data ['target_id'] );
            if (! empty ( $data ['credit_bug'] )) {
                $credit ['score'] = $data ['credit_bug'];
                $credit ['experience'] = 0;
                add_credit ( 'scratch_credit_bug', 5, $credit );
            }
        }
        echo $res;
    }
}