From bf7c67daa9bf689cd600a587a9a46f9fe6d8631e Mon Sep 17 00:00:00 2001
From: zpc <zpc1131@gamil.com>
Date: Fri, 26 Sep 2025 16:47:57 +0800
Subject: [PATCH] 321

---
 .../Controllers/SQController.cs               | 103 +++++++++++++++++-
 1 file changed, 99 insertions(+), 4 deletions(-)

diff --git a/CoreCms.Net.Web.WebApi/Controllers/SQController.cs b/CoreCms.Net.Web.WebApi/Controllers/SQController.cs
index 36e74ed..d2e1089 100644
--- a/CoreCms.Net.Web.WebApi/Controllers/SQController.cs
+++ b/CoreCms.Net.Web.WebApi/Controllers/SQController.cs
@@ -479,10 +479,6 @@ public class SQController : ControllerBase
                 Msg = "房间不存在"
             };
         }
-
-
-
-
         // 3. 检查房间是否可预约（不可用时间段）
         var hasUnavailable = await _sQRoomUnavailableTimesServices.QueryListByClauseAsync(
             t => t.room_id == dto.room_id && t.start_time < end_time && t.end_time > start_time,
@@ -597,6 +593,105 @@ public class SQController : ControllerBase
         };
     }
 
+    /// <summary>
+    /// 用户是否可以创建预约（仅校验，不创建）
+    /// </summary>
+    /// <param name="dto">创建预约所需参数</param>
+    /// <returns>返回可否创建及原因</returns>
+    [HttpPost]
+    [Authorize]
+    public async Task<WebApiDto> CanCreateSQReservation([FromBody] SQReservationsAddDto dto)
+    {
+        var userId = _user.ID;
+        var start_time = DateTimeOffset.FromUnixTimeSeconds(dto.start_time).AddHours(8).DateTime;
+        var end_time = DateTimeOffset.FromUnixTimeSeconds(dto.end_time).AddHours(8).DateTime;
+
+        // 1. 参数校验
+        if (dto == null || dto.room_id <= 0 || start_time >= end_time)
+        {
+            return new WebApiDto()
+            {
+                Code = 500,
+                Data = new { canCreate = false },
+                Msg = "参数错误"
+            };
+        }
+
+        // 2. 检查房间是否存在
+        var room = await _SQRoomsServices.QueryByClauseAsync(r => r.id == dto.room_id, r => r.id, OrderByType.Asc);
+        if (room == null)
+        {
+            return new WebApiDto()
+            {
+                Code = 500,
+                Data = new { canCreate = false },
+                Msg = "房间不存在"
+            };
+        }
+
+        // 3. 检查房间是否可预约（不可用时间段）
+        var hasUnavailable = await _sQRoomUnavailableTimesServices.QueryListByClauseAsync(
+            t => t.room_id == dto.room_id && t.start_time < end_time && t.end_time > start_time,
+            t => t.id, OrderByType.Asc);
+        if (hasUnavailable != null && hasUnavailable.Count > 0)
+        {
+            return new WebApiDto()
+            {
+                Code = 500,
+                Data = new { canCreate = false },
+                Msg = "该时间段房间不可预约"
+            };
+        }
+
+        // 2.1 校验用户是否有其它预约时间冲突（只查未开始或正在进行中的预约）
+        var now = DateTime.Now;
+        var hasConflict = await _SQReservationParticipantsServices.QueryMuchAsync<SQReservationParticipants, SQReservations, int>(
+            (p, r) => new object[]
+            {
+                JoinType.Inner, p.reservation_id == r.id
+            },
+            (p, r) => r.id,
+            (p, r) =>
+                p.user_id == userId &&
+                p.status == 0 &&
+                r.status < 3 &&
+                r.end_time > now &&
+                r.start_time < end_time && r.end_time > start_time
+        );
+
+        if (hasConflict != null && hasConflict.Count > 0)
+        {
+            return new WebApiDto
+            {
+                Code = 402,
+                Data = new { canCreate = false },
+                Msg = "您有其它预约时间冲突，无法创建该预约！"
+            };
+        }
+
+        // 4. 检查房间是否已被预约（未取消的预约，时间有重叠）
+        var hasReserved = await _SQReservationsServices.QueryListByClauseAsync(
+            r => r.room_id == dto.room_id && r.status < 2 && r.start_time < end_time && r.end_time > start_time,
+            r => r.id, OrderByType.Asc);
+        if (hasReserved != null && hasReserved.Count > 0)
+        {
+            return new WebApiDto()
+            {
+                Code = 500,
+                Data = new { canCreate = false },
+                Msg = "该时间段房间已被预约"
+            };
+        }
+
+        // 全部通过
+        return new WebApiDto()
+        {
+            Code = 0,
+            Data = new { canCreate = true },
+            Msg = "ok"
+        };
+    }
+
     /// <summary>
     /// 用户加入预约接口
     /// </summary>