PHP code example of lotteryyii / lottery

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

lotteryyii / lottery example snippets

    'aliases' => [
        '@lotteryyii/lottery'   => '@vendor/lotteryyii/lottery/src',
    ],

/**
 * Lottery  lottery. 抽奖主方法
 * @param $uid int 用户id
 * @param $activityId int 活动id
 * @param $lotteryLimit int 抽奖次数
*/
public static function lottery($activityId,$uid=null,$lotteryLimit=0)
{
	$activityInfo =self::activityInfo($activityId);
	if(!$activityInfo){
	
		return self::returnOut(0,'活动不存在');
	}
	if(!self::checkActivitydate($activityInfo)){
	
		return self::returnOut(0,'今天不在活动时间范围哦');
	}
	$prize = new LotteryPrize;
	$prizeObj = $prize->getAllList($activityId);
	if(!$prizeObj){

		return self::returnOut(0,'奖品不存在');
	}
	//$lotteryLimit == 0时，不限抽奖次数。
	if($uid && $lotteryLimit!=0){
		$redis = \Yii::$app->redis;
		//获取用户已抽奖次数，默认$lotteryTimes为0
		$lotteryTimes = $redis->hget('lotterytimes', 'lotterytimes_'.$activityId.'_'.$uid)?$redis->hget('lotterytimes', 'lotterytimes_'.$activityId.'_'.$uid):0 ;
		if( $lotteryTimes > $lotteryLimit-1){
			return self::returnOut(0,'抽奖次数已用完');
		}
		$redis->hincrby('lotterytimes','lotterytimes_'.$activityId.'_'.$uid,1); //记录用户抽奖次数
		//如果是每日限制$lotteryLimit次，则设置第二天0点过期
		//$redis->expire('lotterytimes','lotterytimes_'.$activityId.'_'.$uid,strtotime(date("Y-m-d",time()))+3600*24-time());
	}
	$proArr = []; //所有奖品概率基数数组
	foreach ($prizeObj as $obj) {
		if( $obj->num != 0 && $obj->basenumber!=0) { //奖品数量有限,概率基数不为0时
			//检查奖品数量是否达到抽取上限,达到则设置该奖项的中奖率为0。
			if(!self::checkPrizeCount($obj)){
				$obj->basenumber = 0;
			}				
		}
		$proArr[] = $obj->basenumber;
	}
	$prizeIndex = self::getRand($proArr); //根据概率获取奖品的索引
	$result = $prizeObj[$prizeIndex]; //中奖奖品
	$record = new LotteryRecord;
	$addData = ['uid'=>$uid,'prizeId'=>$result->id,'prizename'=>$result->name,'activityId'=>$activityInfo->id,'activitytitle'=>$activityInfo->title,'state'=>$result->state,'lotterytime'=>time()];
	if($result->num == 0){ //奖品数量无限制时
		if(!$record->addonly($addData) ){ //中奖纪录写入数据库表,写入失败时，回退中奖次数
			if($uid && $lotteryLimit!=0){			
				$redis->hincrby('lotterytimes','lotterytimes_'.$activityId.'_'.$uid,-1); 
			}
		}
	}else{ //奖品数量有限制时
		$lott_num = $result->lott_num + 1 ;//已中奖数量+1
		if(!$record->addwith($addData,$lott_num) ){ //中奖纪录写入中奖记录表并更新奖品表，失败时，回退中奖次数
			if($uid && $lotteryLimit!=0){			
				$redis->hincrby('lotterytimes','lotterytimes_'.$activityId.'_'.$uid,-1); 
			}
		}		
		
	}
	$data['id'] = $result->id; //中奖奖品id
	$data['name'] = $result->name; //中奖奖品名称
	$data['state'] = $result->state; //是否为空奖谢谢参与
	$data['index'] = $prizeIndex; //中奖奖品的索引
	return self::returnOut(0,'',$data);
}

/**
* Lottery  getRand. 抽奖算法
* @param array $proArr 所有奖品概率基数数组
*/
protected static function getRand( $proArr ) 
{
	$result = '';
	//$proSum抽奖概率基数之和
	$proSum = array_sum( $proArr ); 

	foreach ($proArr as $k => $v) { 
		//获取当次抽奖概率基数
		$randNum = mt_rand(1, $proSum);
		if ($randNum <= $v) { //$randNum在当前奖品概率基数（$v）内，直接返回结果
			$result = $k;
			break;
		} else { //减去当前概率基数，继续寻找，直到满足$randNum在$v内
			$proSum -= $v;
		}
	}
	//删除$proArr，防止影响下次抽奖
	unset($proArr);

	return $result;
}

namespace app\controllers;
use Yii;
use lotteryyii\lottery\Lottery;
use yii\web\Controller;

class LotteryController extends Controller
{
	public $layout = false;
	/**
	* Lottery  index. 抽奖方法
	 * @param $uid int 用户id
	 * @param $activityId int 活动id
	 * @param $lotteryLimit int 抽奖次数
	*/
	public function actionIndex()
	{
		$activityId = Yii::$app->request->get('activityId',1);
		$uid =Yii::$app->request->get('uid',1);
		$lotteryLimit = Yii::$app->request->get('lotteryLimit',3);;
		$result = Lottery::lottery($activityId,$uid,$lotteryLimit);
		Yii::$app->response->format =  \yii\web\Response::FORMAT_JSON;
		if($result['result']){
			return ['code'=>0,'data'=>$result['result']];
		}else{
			return ['code'=>0,'message'=>$result['message']];
		}
	
	}
}