温度看板搭建示例

Service/Implement/Inspection/DeviceDashboardService.cs

@@ -1,12 +1,70 @@
+using Model;
+using Model.Entity;
+using ORM;
 using Service.Interface;
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
 namespace Service.Implement
 {
     /// <summary>
-    /// 设备看板 服务实现
+    /// 设备看板服务实现（温湿度）
     /// </summary>
     public class DeviceDashboardService : IDeviceDashboardService
     {
-        // TODO: 实现 设备看板 相关方法
+        /// <summary>
+        /// 获取每台设备最新一条温湿度数据（看板卡片用）
+        /// </summary>
+        public async Task<Result<List<TemperatureBoxDataEntity>>> GetRealtimeAsync()
+        {
+            try
+            {
+                var db = SqlSugarContext.DbContext;
+
+                // 雪花 Id 单调递增，每台设备取最大 Id 即最新一条
+                var latestIds = await db.Queryable<TemperatureBoxDataEntity>()
+                    .Where(x => x.IsDel == 0)
+                    .GroupBy(x => x.DeviceCode)
+                    .Select(x => SqlFunc.AggregateMax(x.Id))
+                    .ToListAsync();
+
+                var list = await db.Queryable<TemperatureBoxDataEntity>()
+                    .Where(x => latestIds.Contains(x.Id))
+                    .OrderBy(x => x.DeviceCode)
+                    .ToListAsync();
+
+                return Result<List<TemperatureBoxDataEntity>>.Success(list);
+            }
+            catch (Exception ex)
+            {
+                return Result<List<TemperatureBoxDataEntity>>.Error("查询设备实时数据失败", ex);
+            }
+        }
+
+        /// <summary>
+        /// 获取指定设备最近 N 分钟的温湿度曲线数据（按时间升序）
+        /// </summary>
+        public async Task<Result<List<TemperatureBoxDataEntity>>> GetCurveAsync(string deviceCode, int minutes)
+        {
+            if (string.IsNullOrWhiteSpace(deviceCode))
+                return Result<List<TemperatureBoxDataEntity>>.Error("设备标识不能为空");
+
+            try
+            {
+                var start = DateTime.Now.AddMinutes(-minutes);
+                var list = await SqlSugarContext.DbContext.Queryable<TemperatureBoxDataEntity>()
+                    .Where(x => x.DeviceCode == deviceCode && x.IsDel == 0 && x.CreateTime >= start)
+                    .OrderBy(x => x.CreateTime)
+                    .ToListAsync();
+
+                return Result<List<TemperatureBoxDataEntity>>.Success(list);
+            }
+            catch (Exception ex)
+            {
+                return Result<List<TemperatureBoxDataEntity>>.Error("查询温湿度曲线失败", ex);
+            }
+        }
     }
 }