add(AuthController):新增鉴权控制器

fix(model):修复数据库字段映射问题

backend/IM_API/Services/AuthService.cs

@@ -0,0 +1,57 @@
+using AutoMapper;
+using IM_API.Dtos;
+using IM_API.Exceptions;
+using IM_API.Interface.Services;
+using IM_API.Models;
+using IM_API.Tools;
+using Microsoft.EntityFrameworkCore;
+
+namespace IM_API.Services
+{
+    public class AuthService : IAuthService
+    {
+        private readonly ImContext _context;
+        private readonly ILogger<AuthService> _logger;
+        private readonly IMapper _mapper;
+        public AuthService(ImContext context, ILogger<AuthService> logger, IMapper mapper)
+        {
+            _context = context;
+            _logger = logger;
+            _mapper = mapper;
+        }
+
+        public async Task<User> LoginAsync(LoginRequestDto dto)
+        {
+            string username = dto.Username;
+            string password = dto.Password;
+            var user = await _context.Users.FirstOrDefaultAsync(x => x.Username == username && x.Password == password);
+            if(user is null)
+            {
+                throw new BaseException(CodeDefine.PASSWORD_ERROR);
+            }
+            return user;
+        }
+
+        public async Task<UserInfoDto> RegisterAsync(RegisterRequestDto dto)
+        {
+            string username = dto.Username;
+            string password = dto.Password;
+            string nickname = dto.NickName;
+            //用户是否存在
+            bool isExist = await _context.Users.AnyAsync(x => x.Username == username);
+            if (isExist) throw new BaseException(CodeDefine.USER_ALREADY_EXISTS);
+            User user = new User
+            {
+                Username = username,
+                Password = password,
+                NickName = nickname,
+                OnlineStatusEnum = UserOnlineStatus.Offline,
+                StatusEnum = UserStatus.Normal,
+                Created = DateTime.Now
+            };
+            _context.Users.Add(user);
+            await _context.SaveChangesAsync();
+            return _mapper.Map<UserInfoDto>(user);
+        }
+    }
+}