Add Message.DAL

config.yaml

@@ -10,4 +10,4 @@ packageName: Echo.OpenAPI
 useDateTimeForDate: true
 
 # Deserialize array types to Collection<T> instead of List<T>. (Default: false)
-# useCollection: true
+useCollection: true

src/Message.DAL/IMessageRepository.cs

@@ -0,0 +1,19 @@
+using Message.Model;
+
+namespace Message.DAL
+{
+    public interface IMessageRepository
+    {
+        MessageItem? GetItem(int id);
+
+        IEnumerable<MessageItem> GetItems();
+
+        void AddItem(MessageItem item);
+
+        void UpdateItem(MessageItem item);
+
+        void RemoveItem(MessageItem item);
+
+        void SaveChanges();
+    }
+}

src/Message.DAL/Message.DAL.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.6" />
+  </ItemGroup>
+
+</Project>

src/Message.DAL/MessageDbContext.cs

@@ -0,0 +1,16 @@
+using Message.Model;
+
+using Microsoft.EntityFrameworkCore;
+using System;
+
+namespace Message.DAL
+{
+    public class MessageDbContext : DbContext
+    {
+        public MessageDbContext(DbContextOptions<MessageDbContext> options) : base(options)
+        {
+        }
+
+        public DbSet<MessageItem> Items { get; set; }
+    }
+}

src/Message.DAL/MessageRepository.cs

@@ -0,0 +1,62 @@
+using Message.Model;
+
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Xml.Linq;
+
+namespace Message.DAL
+{
+    public class MessageRepository : IMessageRepository
+    {
+        private readonly MessageDbContext context;
+        public MessageRepository(MessageDbContext context)
+        {
+            this.context = context;
+
+            if (context.Items.Any())
+            {
+                return;
+            }
+
+            var messageItems = new MessageItem[]
+            {
+                new MessageItem { Name = "Item1" },
+                new MessageItem { Name = "Item2" },
+                new MessageItem { Name = "Item3" },
+            };
+
+            context.Items.AddRange(messageItems);
+            context.SaveChanges();
+        }
+
+        public void AddItem(MessageItem item)
+        {
+            context.Items.Add(item);
+        }
+
+        public void UpdateItem(MessageItem item)
+        {
+            context.Items.Update(item);
+        }
+
+        public MessageItem? GetItem(int id)
+        {
+            return context.Items.FirstOrDefault(x => x.Id.Equals(id));
+        }
+
+        public IEnumerable<MessageItem> GetItems()
+        {
+            return context.Items.ToList();
+        }
+
+        public void RemoveItem(MessageItem item)
+        {
+            context.Items.Remove(item);
+        }
+
+        public void SaveChanges()
+        {
+            context.SaveChanges();
+        }
+    }
+}

src/Message.DAL/Model/MessageItem.cs

@@ -0,0 +1,10 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Message.Model
+{
+    public class MessageItem
+    {
+        public int Id { get; private set; }
+        public string? Name { get; set; }
+    }
+}