新需求： 盲盒转盘开发-转盘抽奖接口开发

application/api/model/BlindBoxTurntableGift.php

@@ -17,9 +17,10 @@ class BlindBoxTurntableGift extends Model
     protected $updateTime = 'updatetime';
     protected $table = 'fa_vs_gift';
 
-    //获取礼物类型
+    //获取奖池礼物列表
     public function get_gift_list($gift_bag_id)
     {
+        $box = db::name('vs_gift_bag')->where('id',$gift_bag_id)->find();
         $gifts = db::name('vs_gift_bag_detail')->where('gift_bag_id',$gift_bag_id)->order("id desc")->select();
         $gift_list = [];
         foreach ($gifts as $key => $value) {
@@ -33,6 +34,174 @@ class BlindBoxTurntableGift extends Model
                 $gift_list[$key]['gift_price'] = $gift_data['gift_price'];
             }
         }
-        return ['code' => 1, 'msg' => '获取成功', 'data' => $gift_list];
+
+        $ext = json_decode($box['ext'],true);
+        $box_gift = Db::name('vs_gift')->where('gid',$ext['gift_id'])->find();
+        $result_data = [
+            'title' => $box['name'],
+            'rule_url' => get_system_config_value('web_site')."/api/Page/get_gift_box_rule?box_id=".$box["id"],
+            'box_price' => $box_gift['gift_price'],
+            'gift_list' => $gift_list,
+        ];
+        return ['code' => 1, 'msg' => '获取成功', 'data' => $result_data];
+    }
+    /*
+     * 抽奖
+     */
+    public function draw_gift($gift_bag_id, $user_id, $gift_user_ids,$num=1,$room_id=0){
+        //获取盲盒配置
+        $bag_data = db::name("vs_gift_bag")->field('id,name,ext,periods')->where('id',$gift_bag_id)->find();
+        $ext = json_decode($bag_data['ext'],true);
+        $bag_gift = db::name("vs_gift")->where(['gid'=>$ext['gift_id']])->find();// 获取盲盒信息
+        $toarray = explode(',',$gift_user_ids);
+        foreach ($toarray as $gift_user_id){
+            for($i = 0; $i < $num; $i++){
+                $reslut_draw_gift_data = $this->draw_gift_one($gift_bag_id, $user_id, $gift_user_id,$bag_gift['gift_price'],$bag_data['periods'],$room_id);
+                $reslut_draw_gift[] = $reslut_draw_gift_data['data'];
+            }
+        }
+        $reslut_gift = [];
+        $reslut_data = [];
+        foreach ($reslut_draw_gift as $key => $value) {
+            $gift_user_id = $value['gift_user_id'];
+            $gift_id = $value['gift_id'];
+
+            // 以 gift_user_id 和 gift_id 作为键进行分组
+            $group_key = $gift_user_id . '_' . $gift_id;
+
+            if (!isset($reslut_gift[$group_key])) {
+                $reslut_gift[$group_key] = [
+                    'gift_user_id' => $gift_user_id,
+                    'gift_id' => $gift_id,
+                    'count' => 1,
+                    'gift_price' => $value['gift_price']
+                ];
+            } else {
+                $reslut_gift[$group_key]['count']++;
+            }
+            if (!isset($reslut_data[$gift_id])) {
+                $reslut_data[$gift_id] = [
+                    'gift_id' => $gift_id,
+                    'count' => 1
+                ];
+             }else {
+                $reslut_data[$gift_id]['count']++;
+            }
+        }
+        $reslut_gift = array_values($reslut_gift);
+        //盲盒转盘抽奖记录
+        $box_turntable_log = db::name('vs_blind_box_turntable_log')->insertGetId([
+            'user_id' => $user_id,
+            'gift_bag_id' => $gift_bag_id,
+            'num' => $num,
+            'room_id' => $room_id,
+            'bag_price' => $bag_gift['gift_price'],
+            'lottery_result' => json_encode($reslut_gift),
+            'createtime' => time()
+        ]);
+        $reslut['blind_box_turntable_id'] = $box_turntable_log;
+        $reslut['reslut_list'] = array_values($reslut_data);
+        return V(1,"成功", $reslut);
+    }
+    /*
+     * 单人单次抽奖
+     */
+    public function draw_gift_one($gift_bag_id, $user_id, $gift_user_id,$gift_price,$periods,$room_id=0){
+        //随机获取一个礼物
+        $where = [
+            'gift_bag_id' => $gift_bag_id,
+            'quantity' => ['>',0],
+            'remaining_number' => ['>',0]
+        ];
+        // 优化：基于剩余数量的加权随机选择
+        $gift_bag_details = db::name("vs_gift_bag_detail")->where($where)->select();
+        if (empty($gift_bag_details)) {
+            return ['code' => 0, 'msg' => '当前盲盒无可用礼物', 'data' => []];
+        }
+        //奖池总的抽奖次数
+        $total_quantity  = db::name("vs_gift_bag_detail")->where(['gift_bag_id' => $gift_bag_id])->sum('quantity');
+        // 实现加权随机算法：剩余数量越多，被抽中的概率越大
+        $total_remaining = 0;
+        foreach ($gift_bag_details as $gift) {
+            $total_remaining += $gift['remaining_number'];
+        }
+        //本期当前第多少次后抽奖 总的抽奖次数- 剩余数量
+        $total_draw_times = $total_quantity - $total_remaining;
+
+        $rand_value = mt_rand(1, $total_remaining);
+        $current_sum = 0;
+        $gift_bag_detail = null;
+        foreach ($gift_bag_details as $gift) {
+            if($gift['remaining_number'] <= 0){
+                continue;
+            }
+            if($total_draw_times < $gift['weight']){
+                continue;
+            }
+            $current_sum += $gift['remaining_number'];
+            if ($rand_value <= $current_sum) {
+                $gift_bag_detail = $gift;
+                break;
+            }
+        }
+        if($gift_bag_detail){
+            //获取开出礼物的信息
+            $gift = db::name("vs_gift")->where(['gid'=>$gift_bag_detail['foreign_id']])->find();
+            //处理礼包发放记录表
+            $data = [];
+            $data['user_id'] = $user_id;
+            $data['gift_user_id'] = $gift_user_id;
+            $data['gift_bag_id'] = $gift_bag_id;
+            $data['gift_id'] = $gift_bag_detail['foreign_id'];
+            $data['periods'] = $periods;
+            $data['room_id'] = $room_id;
+            $data['gift_price'] = $gift['gift_price'];
+            $data['bag_price'] = $gift_price;
+            $data['createtime'] = time();
+            $result = db::name("vs_gift_bag_receive_log")->insert($data);
+            if(!$result){
+                return ['code' => 0, 'msg' => '失败,', 'data' => []];
+            }
+            //减去盲盒包礼物数量
+            $ret = db::name("vs_gift_bag_detail")->where('id',$gift_bag_detail['id'])->setDec('remaining_number');
+            if(!$ret){
+                return ['code' => 0, 'msg' => '失败.', 'data' => []];
+            }
+            //判断剩余数量是否为0 为0重置，进入下一期
+            $gift_bag_num = db::name("vs_gift_bag_detail")->where('gift_bag_id',$gift_bag_id)->sum('remaining_number');
+            if($gift_bag_num <= 0){
+                db::name("vs_gift_bag")->where('id',$gift_bag_id)->setInc('periods');
+                db::name("vs_gift_bag_detail")->where('gift_bag_id',$gift_bag_id)->update(['remaining_number'=>db::raw('quantity')]);
+            }
+        }else{
+            return ['code' => 0, 'msg' => '失败!', 'data' => []];
+        }
+        $result_data = [
+            'user_id' => $user_id,
+            'gift_user_id'=>$gift_user_id,
+            'gift_id'=>$gift_bag_detail['foreign_id'],
+            'gift_price'=>$gift['gift_price'],
+            'is_public_screen'=>$gift['is_public_screen'],
+        ];
+        return ['code' => 1, 'msg' => '成功', 'data' => $result_data];
+    }
+
+    /*
+     * 礼物发放
+     */
+    public function gift_send($send_id){
+        $blind_box_turntable = db('vs_blind_box_turntable_log')->where('id',$send_id)->find();
+        if(!$blind_box_turntable){
+            return ['code' => 0, 'msg' => '数据不存在'];
+        }
+        $reslut_gift = json_decode($blind_box_turntable['lottery_result'],true);
+        foreach ($reslut_gift as $key => $value) {
+            $res = model('GiveGift')->give_gift($blind_box_turntable['user_id'], $value['gift_user_id'], $value['gift_id'],  $value['count'],2,1, $blind_box_turntable['room_id']);
+            if (isset($res) && $res['code'] != 1) {
+                return V(0, $res['msg']);
+            }
+        }
+        $res = db('BlindBoxTurntable')->where('id', $blind_box_turntable['id'])->update(['is_sued' => 1, 'updatetime' => time()]);
+        return ['code' => 1, 'msg' => '成功', 'data' => $res];
     }
 }