<?php
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namespace app\api\model\plus\lottery;
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use app\api\model\settings\Setting as SettingModel;
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use app\common\model\plus\lottery\Lottery as LotteryModel;
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use app\api\model\plus\coupon\UserCoupon;
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use think\facade\Cache;
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/**
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*转盘模型
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*/
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class Lottery extends LotteryModel
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{
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/**
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* 转盘详情
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* @param $data
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*/
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public function getDetail()
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{
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$detail = self::detail();
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if ($detail) {
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$LotteryPrize = new LotteryPrize;
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$detail['prize'] = $LotteryPrize::detail($detail['lottery_id']);
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$points_name = SettingModel::getPointsName();
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if ($detail['prize']) {
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foreach ($detail['prize'] as &$item) {
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if ($item['type'] == 2) {
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$item['name'] = $points_name ? $item['points'] . $points_name : $item['name'];
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}
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}
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}
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}
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return $detail;
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}
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/**
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* 已抽奖次数
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* @param $data
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*/
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public function getNum($user)
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{
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//抽奖次数
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$time = strtotime(date('Y-m-d', time()));
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$num = Cache::get('draw_' . $time . $user['user_id']);
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return $num ? $num : 0;
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}
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/**
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* 抽奖
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* @param $data
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*/
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public function getdraw($user)
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{
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$this->startTrans();
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try {
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//奖品详情
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$detail = self::detail();
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if ($detail['status'] == 0) {
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$this->error = "抽奖未开启";
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return false;
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}
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if ($user['points'] < $detail['points']) {
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$this->error = "积分不足";
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return false;
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}
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$time = strtotime(date('Y-m-d', time()));
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//判断今日抽奖次数
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$num = Cache::get('draw_' . $time . $user['user_id']);
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if ($num && $num >= $detail['times']) {
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$this->error = "今日抽奖次数已用完";
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return false;
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}
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$LotteryPrize = new LotteryPrize;
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$drawArr = $LotteryPrize::detail($detail['lottery_id']);//json_decode($detail['lottery_data'], 1);
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//shuffle($drawArr); //打乱数组顺序
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$arr = [];
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$default = [];
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foreach ($drawArr as $key => $val) {
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if ($val['stock'] - $val['draw_num'] > 0) {
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$arr[$key] = $val['stock'];//概率数组
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}
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if ($val['is_default'] == 1) {
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$default = $val;//默认中奖项
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}
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}
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if ($arr) {
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$rid = $this->get_rand($arr); //根据概率获取奖项
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$result = $drawArr[$rid]; //中奖项
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} else {
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$result = $default; //默认中奖项
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}
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if (!$result) {
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$this->error = "礼品已抽完，请稍后再试";
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return false;
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}
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$arr && $LotteryPrize->where('prize_id', '=', $drawArr[$rid]['prize_id'])->inc('draw_num', 1)->update();
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//添加中奖记录
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$record = [
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'record_name' => $result['name'],
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'user_id' => $user['user_id'],
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'prize_id' => $result['prize_id'],
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'prize_type' => $result['type'],
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'award_id' => $result['award_id'],
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'status' => $result['type'] == 3 ? 0 : 1,
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'app_id' => self::$app_id,
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'points' => $result['points'],
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];
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//更新用户积分
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$user->setIncPoints(-$detail['points'], '抽奖消费积分');
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//更新积分优惠券
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if (in_array($result['type'], [1, 2])) {
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$this->addDraw($result, $user, $detail);
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}
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(new Record)->save($record);
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//今日时间 记录缓存, 24小时
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if ($num) {
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Cache::inc('draw_' . $time . $user['user_id']);
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} else {
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$num = 0;
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Cache::set('draw_' . $time . $user['user_id'], $num + 1, 3600 * 24);
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}
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$this->commit();
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return $result;
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} catch (\Exception $e) {
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$this->error = $e->getMessage();
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$this->rollback();
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return false;
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}
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}
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//更新积分优惠券
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private function addDraw($data, $user,$detail)
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{
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if ($data['type'] == 1) {//优惠券
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$UserCouponModel = new UserCoupon;
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$UserCouponModel->addUserCoupon([$data['award_id']], $user['user_id']);
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} elseif ($data['type'] == 2) {//积分
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$user->setIncPoints($data['points'], '抽奖获取积分',-$detail['points']);
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}
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}
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//计算中奖
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private function get_rand($proArr)
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{
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$result = '';
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//概率数组的总概率精度
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$proSum = array_sum($proArr);
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//概率数组循环
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foreach ($proArr as $key => $proCur) {
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$randNum = mt_rand(1, $proSum); //返回随机整数
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if ($randNum <= $proCur) {
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$result = $key;
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break;
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} else {
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$proSum -= $proCur;
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}
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}
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unset ($proArr);
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return $result;
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}
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}
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