Implement Repository Pattern, BoardInfo as sample

BILib/BoardBl.cs

@@ -1,12 +1,9 @@
-using DBModel;
-using DBModel.SqlModels;
+using DBModel.SqlModels;
 using DtoModel;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Metadata.Internal;
+using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 
 namespace BILib
 {
@@ -15,18 +12,17 @@ namespace BILib
     /// </summary>
     public class BoardBl
     {
-        private MWDBContext _dbContext;
-        private List<BoardDto> _data;
+        private readonly BoardInfoRepository _repository;
+        private readonly ILogger<BoardBl> _logger;
 
         /// <summary>
         /// Constructor
         /// </summary>
         /// <param name="context"></param>
-        public BoardBl(MWDBContext context)
+        public BoardBl(BoardInfoRepository repository, ILogger<BoardBl> logger)
         {
-            _dbContext = context;
-
-            SetFakeData();
+            _repository = repository;
+            _logger = logger;
         }
 
         /// <summary>
@@ -37,7 +33,8 @@ public BoardBl(MWDBContext context)
         /// <returns>看板清單</returns>
         public IEnumerable<BoardDto> GetBoards()
         {
-            return _dbContext.BoardInfo.ToDtos();
+            return _repository.GetAsNoTracking()
+                              .ToDtos();
         }
 
         /// <summary>
@@ -47,7 +44,9 @@ public IEnumerable<BoardDto> GetBoards()
         /// <returns>看板</returns>
         public BoardDto GetBoard(string name)
         {
-            return _dbContext.BoardInfo.SingleOrDefault(p => p.Board == name).ToDto();
+            return _repository.GetAsNoTracking()
+                              .SingleOrDefault(p => p.Board == name)
+                              .ToDto();
         }
 
         /// <summary>
@@ -57,7 +56,9 @@ public BoardDto GetBoard(string name)
         /// <returns>符合的看板清單</returns>
         public IEnumerable<BoardDto> SearchBoards(string keyword)
         {
-            return _dbContext.BoardInfo.Where(p => p.Board.Contains(keyword)).ToDtos();
+            return _repository.GetAsNoTracking()
+                              .Where(p => p.Board.Contains(keyword))                              
+                              .ToDtos();
         }
 
         /// <summary>
@@ -68,19 +69,27 @@ public IEnumerable<BoardDto> SearchBoards(string keyword)
         /// <returns>熱門看板清單</returns>
         public IEnumerable<BoardDto> GetPopularBoards(int page, int count)
         {
-            return _data.Skip((page - 1) * count).Take(count);
+            return _repository.GetAsNoTracking()
+                              //.Where(b => b)  // TODO: 熱門看板的條件
+                              .Skip((page - 1) * count)
+                              .Take(count)
+                              .ToDtos();
         }
 
         /// <summary>
         /// 取得我的最愛看板清單
         /// </summary>
-        /// <param name="id">使用者帳號</param>
+        /// <param name="userId">使用者帳號</param>
         /// <param name="page">頁數</param>
         /// <param name="count">每頁數量</param>
         /// <returns>我的最愛看板清單</returns>
-        public IEnumerable<BoardDto> GetFavoriteBoards(string id, int page, int count)
+        public IEnumerable<BoardDto> GetFavoriteBoards(string userId, int page, int count)
         {
-            return _data.Skip((page - 1) * count).Take(count);
+            return _repository.GetAsNoTracking()
+                              //.Where(b => b)  // TODO: 最愛看板的條件
+                              .Skip((page - 1) * count)
+                              .Take(count)
+                              .ToDtos();
         }
 
         /// <summary>
@@ -92,53 +101,25 @@ public IEnumerable<BoardDto> GetFavoriteBoards(string id, int page, int count)
         /// <returns>看板清單</returns>
         public IEnumerable<BoardDto> GetCategoryBoards(string name, int page, int count)
         {
-            return _data.Skip((page - 1) * count).Take(count);
+            return _repository.GetAsNoTracking()
+                              //.Where(b => b)  // TODO: 分類名稱條件
+                              .Skip((page - 1) * count)
+                              .Take(count)
+                              .ToDtos();
         }
 
         /// <summary>
         /// 取得指定看板版主名單
         /// </summary>
         /// <param name="name">看板名稱</param>
         /// <returns>板主名單</returns>
-        public string[] GetBoardModerators(string name)
-        {
-            var board = _dbContext.BoardInfo.SingleOrDefault(x => x.Board == name);
-            if (board == null) return null;
-
-            var result = board.ToDto().Moderators.Select(p => p.Id).ToArray();
-            return result;
-        }
-
-        /// <summary>
-        /// 建假資料
-        /// </summary>
-        private void SetFakeData()
+        public IEnumerable<string> GetBoardModerators(string name)
         {
-            _data = new List<BoardDto>();
-            for (int i = 1; i <= 100; i++)
-            {
-                var moderators = new List<UserDto>();
-                for (int j = 1; j <= 3; j++)
-                {
-                    moderators.Add(new UserDto
-                    {
-                        Sn = j,
-                        Id = $"Ptter{j}",
-                        NickName = $"NickName{j}",
-                        Money = 100 * j
-                    });
-                }
-
-                _data.Add(new BoardDto
-                {
-                    Sn = i,
-                    Name = $"Test{i}",
-                    BoardType = BoardType.Board,
-                    Title = $"[Test{i}] 測試板{i}",
-                    OnlineCount = 10 * i,
-                    Moderators = moderators
-                });
-            }
+            return _repository.GetAsNoTracking()
+                              .SingleOrDefault(b => b.Board == name)?
+                              .ToDto()
+                              .Moderators?
+                              .Select(p => p.Id);
         }
     }
 
@@ -169,18 +150,23 @@ public static BoardDto ToDto(this BoardInfo source)
         public static IQueryable<BoardDto> ToDtos(this IQueryable<BoardInfo> source)
         {
             var results = source.Select(p => p.ToDto());
+            return results;
+        }
 
+        public static IQueryable<BoardDto> ToDtos(this IEnumerable<BoardInfo> source)
+        {
+            var results = source.AsQueryable()
+                                .Select(p => p.ToDto());
             return results;
         }
     }
 
     public static class BoardDtoExtension
     {
-        public static List<BoardDto> SetSerialNumber(this IEnumerable<BoardDto> source)
+        public static IEnumerable<BoardDto> SetSerialNumber(this IEnumerable<BoardDto> source)
         {
-            var sn = 1;
+            int sn = 1;
             var list = source.ToList();
-
             list.ForEach(p => p.Sn = sn++);
 
             return list;

BILib/BoardHelper.cs

@@ -14,6 +14,9 @@
 
 namespace BILib
 {
+    /// <summary>
+    /// TODO: 未來預期被 BoardHelper_DI 取代；改為 DI 方式
+    /// </summary>
     public class BoardHelper
     {
         private NLog.Logger log = NLog.LogManager.GetCurrentClassLogger();