From 77fa9a0f171c05e4fc0f1c0d980380a571df052b Mon Sep 17 00:00:00 2001
From: yao <yao-chang.yu@outlook.com>
Date: Tue, 12 Nov 2024 22:50:57 +0800
Subject: [PATCH] refactor

---
 .../Controllers/MembersController3.cs         | 19 ++++++++++---------
 .../Member/Repository/MemberDbContext.cs      |  7 ++++++-
 2 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Controllers/MembersController3.cs b/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Controllers/MembersController3.cs
index 3e17f1df..dd985c95 100644
--- a/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Controllers/MembersController3.cs
+++ b/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Controllers/MembersController3.cs
@@ -57,14 +57,15 @@ private int TryGetPageSize() =>
             ? int.Parse(sizes.FirstOrDefault() ?? string.Empty)
             : 10;
 
-    private async Task<CursorPagination<MemberDataEntity>> GetPaginatedResultsAsync(IQueryable<MemberDataEntity> query,
-        int pageSize,
-        string cursor = null,
-        bool isPreviousPage = false)
+    private async Task<CursorPagination<T>> GetPaginatedResultsAsync<T>(IQueryable<T> query,
+                                                                        int pageSize,
+                                                                        string cursorToken = null,
+                                                                        bool isPreviousPage = false)
+        where T : BaseEntity
     {
-        if (!string.IsNullOrEmpty(cursor))
+        if (!string.IsNullOrEmpty(cursorToken))
         {
-            var cursorValue = Convert.FromBase64String(cursor);
+            var cursorValue = Convert.FromBase64String(cursorToken);
             var cursorId = BitConverter.ToInt32(cursorValue, 0);
 
             if (isPreviousPage)
@@ -78,14 +79,14 @@ private async Task<CursorPagination<MemberDataEntity>> GetPaginatedResultsAsync(
         }
         else
         {
-            query = query.OrderBy(x => x.Id);
+            query = query.OrderBy(x => x.SequenceId);
         }
 
         // 取得查詢結果並確保順序
         var items = await query.Take(pageSize).ToListAsync();
         if (isPreviousPage)
         {
-            items.Reverse(); // 反轉以符合遞增順序
+            items.Reverse();
         }
 
         // 計算下一頁和上一頁的游標
@@ -96,7 +97,7 @@ private async Task<CursorPagination<MemberDataEntity>> GetPaginatedResultsAsync(
             ? Convert.ToBase64String(BitConverter.GetBytes(items.First().SequenceId))
             : null;
 
-        return new CursorPagination<MemberDataEntity>
+        return new CursorPagination<T>
         {
             Items = items,
             NextCursorToken = nextCursor,
diff --git a/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Member/Repository/MemberDbContext.cs b/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Member/Repository/MemberDbContext.cs
index 23e81f42..853c373f 100644
--- a/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Member/Repository/MemberDbContext.cs
+++ b/Paging/Lab.CursorPaging/Lab.CursorPaging.WebApi/Member/Repository/MemberDbContext.cs
@@ -46,7 +46,7 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
     }
 }
 
-public class MemberDataEntity
+public class MemberDataEntity : BaseEntity
 {
     public string Id { get; set; }
 
@@ -70,4 +70,9 @@ public class MemberDataEntity
 
     // [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
     public long SequenceId { get; set; }
+}
+
+public class BaseEntity
+{
+    public long SequenceId { get; set; }
 }
\ No newline at end of file