feat: 跳转大转盘概率

Yi.Abp.Net8/module/bbs/Yi.Framework.Bbs.Application/Services/Integral/LuckyService.cs

@@ -0,0 +1,56 @@
+using System;
+using Microsoft.AspNetCore.Authorization;
+using Volo.Abp.Application.Services;
+using Volo.Abp.EventBus.Local;
+using Yi.Framework.Bbs.Domain.Shared.Etos;
+
+namespace Yi.Framework.Bbs.Application.Services.Integral
+{
+    public class LuckyService : ApplicationService
+    {
+        private ILocalEventBus _localEventBus;
+        public LuckyService(ILocalEventBus localEventBus) { _localEventBus = localEventBus; }
+
+        /// <summary>
+        /// 大转盘
+        /// </summary>
+        /// <returns></returns>
+        [Authorize]
+        public async Task<int> PostWheel()
+        {
+            int[] values=new int[10] { 0,10,30,50,80,100,150,200,300,666};
+            var index = GetWheelIndex();
+            var value = values[index]-50;
+
+            //修改钱钱，如果钱钱不足，直接会丢出去,那本次抽奖将无效
+            await _localEventBus.PublishAsync(new MoneyChangeEventArgs { UserId = CurrentUser.Id!.Value, Number = value }, false);
+
+            return index;
+        }
+
+        private int GetWheelIndex()
+        {
+            int[] probabilities = { 10, 20, 30, 20, 5, 5, 4, 3, 2, 1 };
+
+            int total = 0;
+            foreach (var prob in probabilities)
+            {
+                total += prob;
+            }
+
+            int randomNum = new Random().Next(1, total + 1);
+
+            int cumulativeProb = 0;
+            for (int i = 0; i < probabilities.Length; i++)
+            {
+                cumulativeProb += probabilities[i];
+                if (randomNum <= cumulativeProb)
+                {
+                    return i;
+                }
+            }
+            var value = probabilities.Length - 1;
+            return value;
+        }
+    }
+}