140 lines
4.2 KiB
PHP
140 lines
4.2 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | YwxApp [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Author: ywxapp<admin@ywxapp.cn>
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// +----------------------------------------------------------------------
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declare (strict_types = 1);
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namespace addon\wxchat\controller\api;
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use addon\wxchat\model\WxchatLotteryPrize;
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use addon\wxchat\model\WxchatLotteryRecord;
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use think\facade\Db;
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use think\facade\Request;
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use ywxapp\controller\FrontendBase;
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use ywxapp\service\WalletService;
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/**
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* Lottery 类
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*
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* @author ywxapp <admin@ywxapp.cn>
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*/
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class Lottery extends FrontendBase
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{
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protected $noNeedLogin = [];
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protected $noNeedVerify = ['*'];
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// 每次抽奖消耗金币
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protected $cost = 10;
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// 每日免费次数
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protected $freeDaily = 1;
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protected function initialize()
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{
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if ($this->auth->isLogin) {
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$this->uid = $this->auth->model->uid;
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}
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}
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private $uid = 0;
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/**
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* 抽奖配置（奖品列表 + 我的金币 + 剩余免费次数）
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*/
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public function config()
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{
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$uid = $this->uid;
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$prizes = WxchatLotteryPrize::where('status', 1)
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->order('sort', 'asc')
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->field('id,name,type,value,probability')
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->select();
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$freeUsed = WxchatLotteryRecord::where('uid', $uid)
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->where('is_free', 1)
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->where('create_at', '>=', strtotime('today'))
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->count();
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$this->success([
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'coins' => WalletService::getCoins($uid),
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'cost' => $this->cost,
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'free_daily' => $this->freeDaily,
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'free_left' => max(0, $this->freeDaily - $freeUsed),
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'prizes' => $prizes,
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]);
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}
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/**
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* 抽奖（金币或免费）
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*/
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public function draw()
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{
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$uid = $this->uid;
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// 是否使用免费次数
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$freeUsed = WxchatLotteryRecord::where('uid', $uid)
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->where('is_free', 1)
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->where('create_at', '>=', strtotime('today'))
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->count();
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$useFree = Request::post('use_free', 0) && $freeUsed < $this->freeDaily;
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if (! $useFree) {
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try {
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WalletService::decCoins($uid, $this->cost, '抽奖消耗');
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} catch (\Throwable $e) {
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$this->error($e->getMessage());
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}
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}
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$prize = $this->pickPrize();
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$record = new WxchatLotteryRecord();
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$record->uid = $uid;
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$record->prize_id = $prize ? $prize->id : 0;
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$record->prize_name = $prize ? $prize->name : '谢谢参与';
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$record->prize_type = $prize ? $prize->type : 3;
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$record->prize_value = $prize ? $prize->value : 0;
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$record->is_free = $useFree ? 1 : 0;
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$record->save();
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// 金币奖品发放
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if ($prize && $prize->type == 1 && $prize->value > 0) {
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WalletService::incCoins($uid, (int) $prize->value, "抽奖中奖:{$prize->name}");
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}
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$this->success([
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'prize' => $record->prize_name,
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'prize_type' => $record->prize_type,
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'prize_value'=> $record->prize_value,
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'coins_left' => WalletService::getCoins($uid),
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], '抽奖完成');
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}
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/**
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* 按概率加权抽取奖品（无命中返回 null）
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*/
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private function pickPrize()
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{
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$prizes = WxchatLotteryPrize::where('status', 1)
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->where('stock', '<>', 0)
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->order('sort', 'asc')
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->select();
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if ($prizes->isEmpty()) {
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return null;
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}
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$rand = mt_rand(1, 10000) / 10000; // 0-1
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$acc = 0.0;
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foreach ($prizes as $p) {
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$acc += (float) $p->probability;
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if ($rand <= $acc) {
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// 扣库存
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if ($p->stock > 0) {
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Db::name('wxchat_lottery_prizes')->where('id', $p->id)->dec('stock')->update(['update_at' => time()]);
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}
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return $p;
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}
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}
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return null;
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}
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}
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