PHP code example of zclott / lottery

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

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

    

zclott / lottery example snippets

// laravel < 5.5
Zclott\Lottery\LotteryServiceProvider::class,

// lumen
$app->register(Zclott\Lottery\LotteryServiceProvider::class);

'Lottery' => Zclott\Lottery\Facades\Pay::class,

$ php artisan vendor:publish --provider=" Zclott\Lottery\LotteryServiceProvider"

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

			return $this->returnOut(0,'奖品不存在');
		}
		//$lotteryLimit == 0时，不限抽奖次数。
		if($uid && $lotteryLimit!=0){
			//获取用户已抽奖次数，默认$lotteryTimes为0
			$lotteryTimes = Redis::hget('lotterytimes', 'lotterytimes_'.$activityId.'_'.$uid)?Redis::hget('lotterytimes', 'lotterytimes_'.$activityId.'_'.$uid):0 ;
			if( $lotteryTimes > $lotteryLimit-1){
				return $this->returnOut(0,'抽奖次数已用完');
			}
			Redis::hincrby('lotterytimes','lotterytimes_'.$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 && $obj->basenumber!=0) { //奖品数量有限,概率基数不为0时
				//检查奖品数量是否达到抽取上限,达到则设置该奖项的中奖率为0。
				if(!$this->checkPrizeCount($obj)){
					$obj->basenumber = 0;
				}				
			}
			$proArr[] = $obj->basenumber;
		}
		$prizeIndex = $this->getRand($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(!$record->add($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->update($addData,$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 $this->returnOut(0,'',$data);
	}

	/**
	* Lottery  getRand. 抽奖算法
	* @param array $proArr 所有奖品概率基数数组
	*/
	protected 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\Http\Controllers;
use Illuminate\Http\Request;
use Lottery;

class LotteryController extends Controller
{
    /**
	* 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 index(Request $request)
    {
    	$activityId = $request->get('activityId',1);
    	$uid = $request->get('uid',1);
    	$lotteryLimit = $request->get('lotteryLimit',3);;
		$result = Lottery::lottery($activityId,$uid,$lotteryLimit);
		if($result['result']){
			return response()->json(['code'=>0,'data'=>$result['result']]);
		}else{
			return response()->json(['code'=>0,'message'=>$result['message']]);
		}
		
    }
}