添加项目文件。

2026-05-09 17:06:30 +08:00
parent c60f5fe117
commit 720ef957d4
378 changed files with 14843 additions and 0 deletions
@@ -0,0 +1,55 @@
+using MessageService.Domain.Entities;
+using MessageService.Domain.IReposities;
+using Microsoft.EntityFrameworkCore;
+
+namespace MessageService.Infrastructure.Reposities
+{
+    public class MessageReposity : IMessageReposity
+    {
+        private readonly MessageDbContext db;
+
+        public MessageReposity(MessageDbContext db)
+        {
+            this.db = db;
+        }
+
+        public void Create(Message message)
+        {
+            db.Messages.Add(message);
+        }
+
+        public async Task<Message?> FindByIdAsync(Guid id)
+        {
+            return await db.Messages.FirstOrDefaultAsync(x => x.Id == id);
+        }
+
+        public async Task<(IEnumerable<Message> messages, bool hasMore)> GetAsync(string streamKey, long? cusor, int direction, int limit)
+        {
+            var query = db.Messages.Where(x => x.StreamKey == streamKey);
+            List<Message> messages = [];
+            if (direction == 0) // Before: 找比锚点小的，按倒序排
+            {
+                if (cusor.HasValue)
+                    query = query.Where(m => m.SequenceId < cusor.Value);
+
+                var list = await query
+                    .OrderByDescending(m => m.SequenceId) // 最新消息在最前
+                    .Take(limit + 1)
+                    .ToListAsync();
+
+                messages = [.. list.OrderBy(s => s.SequenceId)];
+            }
+            else
+            {
+                if (cusor is null)
+                    return (messages, false);
+
+                messages = await query.OrderBy(o => o.SequenceId)
+                    .Take(limit + 1)
+                    .ToListAsync();
+            }
+
+            return (messages, messages.Count > limit);
+        }
+    }
+}