添加命令数据验证和其他杂项修改

Infrastructure/Repositories/LinkRepository.cs

@@ -1,5 +1,6 @@
 using Domain.AggregateModel.LinkAggregate;
 using Domain.SeedWork;
+using Microsoft.EntityFrameworkCore;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -10,16 +11,33 @@ namespace Infrastructure.Repositories
 {
     public class LinkRepository : ILinkRepository
     {
-        public IUnitOfWork UnitOfWork => throw new NotImplementedException();
+        private AppDbContext dbContext;
 
-        public void Add(Link link)
+        public LinkRepository(AppDbContext dbContext)
         {
-            throw new NotImplementedException();
+            this.dbContext = dbContext;
         }
 
-        public Task<Link> GetAsync(string shortCode)
+        public IUnitOfWork UnitOfWork => dbContext;
+
+        public Link Add(Link link)
         {
-            throw new NotImplementedException();
+            if (link.IsTransient())
+            {
+                return dbContext.Links.Add(link).Entity;
+            }
+            else
+            {
+                return link;
+            }
+        }
+
+        public async Task<Link> GetAsync(string shortCode)
+        {
+            var link = await dbContext.Links
+                .Where(l => l.ShortCode==shortCode)
+                .SingleOrDefaultAsync();
+            return link;
         }
     }
 }