feat: 관리자 로그인 API 구현 (#36)

- LoginRequestDto, LoginResponseDto 추가
- IAuthService, AuthService 구현 (BCrypt 비밀번호 검증)
- AdminRepository 구현 (GetByEmailAsync)
- AuthController 추가 (POST /v1/in/auth/login)
- DI 등록 (IAuthService, IAdminRepository)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SPMS.API/Controllers/AuthController.cs

@@ -0,0 +1,34 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Swashbuckle.AspNetCore.Annotations;
+using SPMS.Application.DTOs.Auth;
+using SPMS.Application.Interfaces;
+using SPMS.Domain.Common;
+
+namespace SPMS.API.Controllers;
+
+[ApiController]
+[Route("v1/in/auth")]
+[ApiExplorerSettings(GroupName = "auth")]
+public class AuthController : ControllerBase
+{
+    private readonly IAuthService _authService;
+
+    public AuthController(IAuthService authService)
+    {
+        _authService = authService;
+    }
+
+    [HttpPost("login")]
+    [AllowAnonymous]
+    [SwaggerOperation(
+        Summary = "관리자 로그인",
+        Description = "이메일과 비밀번호로 로그인하여 JWT 토큰을 발급받습니다.")]
+    [SwaggerResponse(200, "로그인 성공", typeof(ApiResponse<LoginResponseDto>))]
+    [SwaggerResponse(401, "로그인 실패")]
+    public async Task<IActionResult> LoginAsync([FromBody] LoginRequestDto request)
+    {
+        var result = await _authService.LoginAsync(request);
+        return Ok(ApiResponse<LoginResponseDto>.Success(result));
+    }
+}

SPMS.Application/DTOs/Auth/LoginRequestDto.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace SPMS.Application.DTOs.Auth;
+
+public class LoginRequestDto
+{
+    [Required(ErrorMessage = "이메일은 필수입니다.")]
+    [EmailAddress(ErrorMessage = "올바른 이메일 형식이 아닙니다.")]
+    public string Email { get; set; } = string.Empty;
+
+    [Required(ErrorMessage = "비밀번호는 필수입니다.")]
+    public string Password { get; set; } = string.Empty;
+}

SPMS.Application/DTOs/Auth/LoginResponseDto.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+
+namespace SPMS.Application.DTOs.Auth;
+
+public class LoginResponseDto
+{
+    [JsonPropertyName("access_token")]
+    public string AccessToken { get; set; } = string.Empty;
+
+    [JsonPropertyName("refresh_token")]
+    public string RefreshToken { get; set; } = string.Empty;
+
+    [JsonPropertyName("expires_in")]
+    public int ExpiresIn { get; set; }
+
+    [JsonPropertyName("admin")]
+    public AdminInfoDto? Admin { get; set; }
+}
+
+public class AdminInfoDto
+{
+    [JsonPropertyName("admin_code")]
+    public string AdminCode { get; set; } = string.Empty;
+
+    [JsonPropertyName("email")]
+    public string Email { get; set; } = string.Empty;
+
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = string.Empty;
+
+    [JsonPropertyName("role")]
+    public string Role { get; set; } = string.Empty;
+}

SPMS.Application/DependencyInjection.cs

@@ -1,4 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
+using SPMS.Application.Interfaces;
+using SPMS.Application.Services;
 
 namespace SPMS.Application;
 
@@ -7,7 +9,7 @@ public static class DependencyInjection
     public static IServiceCollection AddApplication(this IServiceCollection services)
     {
         // Application Services
-        // services.AddScoped<IAuthService, AuthService>();
+        services.AddScoped<IAuthService, AuthService>();
 
         return services;
     }

SPMS.Application/Interfaces/IAuthService.cs

@@ -0,0 +1,8 @@
+using SPMS.Application.DTOs.Auth;
+
+namespace SPMS.Application.Interfaces;
+
+public interface IAuthService
+{
+    Task<LoginResponseDto> LoginAsync(LoginRequestDto request);
+}

SPMS.Application/SPMS.Application.csproj

@@ -11,7 +11,9 @@
     </ItemGroup>
 
     <ItemGroup>
+      <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.2" />
+      <PackageReference Include="Microsoft.Extensions.Options" Version="10.0.2" />
     </ItemGroup>
 
 </Project>

SPMS.Application/Services/AuthService.cs

@@ -0,0 +1,86 @@
+using Microsoft.Extensions.Options;
+using SPMS.Application.DTOs.Auth;
+using SPMS.Application.Interfaces;
+using SPMS.Application.Settings;
+using SPMS.Domain.Common;
+using SPMS.Domain.Exceptions;
+using SPMS.Domain.Interfaces;
+
+namespace SPMS.Application.Services;
+
+public class AuthService : IAuthService
+{
+    private readonly IAdminRepository _adminRepository;
+    private readonly IUnitOfWork _unitOfWork;
+    private readonly IJwtService _jwtService;
+    private readonly JwtSettings _jwtSettings;
+
+    public AuthService(
+        IAdminRepository adminRepository,
+        IUnitOfWork unitOfWork,
+        IJwtService jwtService,
+        IOptions<JwtSettings> jwtSettings)
+    {
+        _adminRepository = adminRepository;
+        _unitOfWork = unitOfWork;
+        _jwtService = jwtService;
+        _jwtSettings = jwtSettings.Value;
+    }
+
+    public async Task<LoginResponseDto> LoginAsync(LoginRequestDto request)
+    {
+        // 1. 이메일로 관리자 조회
+        var admin = await _adminRepository.GetByEmailAsync(request.Email);
+        if (admin is null)
+        {
+            throw new SpmsException(
+                ErrorCodes.LoginFailed,
+                "이메일 또는 비밀번호가 일치하지 않습니다.",
+                401);
+        }
+
+        // 2. 삭제된 계정 확인
+        if (admin.IsDeleted)
+        {
+            throw new SpmsException(
+                ErrorCodes.LoginFailed,
+                "이메일 또는 비밀번호가 일치하지 않습니다.",
+                401);
+        }
+
+        // 3. 비밀번호 검증 (BCrypt)
+        if (!BCrypt.Net.BCrypt.Verify(request.Password, admin.Password))
+        {
+            throw new SpmsException(
+                ErrorCodes.LoginFailed,
+                "이메일 또는 비밀번호가 일치하지 않습니다.",
+                401);
+        }
+
+        // 4. 토큰 생성
+        var accessToken = _jwtService.GenerateAccessToken(
+            admin.Id,
+            admin.Role.ToString());
+        var refreshToken = _jwtService.GenerateRefreshToken();
+
+        // 5. 최종 로그인 시간 업데이트
+        admin.LastLoginAt = DateTime.UtcNow;
+        _adminRepository.Update(admin);
+        await _unitOfWork.SaveChangesAsync();
+
+        // 6. 응답 반환
+        return new LoginResponseDto
+        {
+            AccessToken = accessToken,
+            RefreshToken = refreshToken,
+            ExpiresIn = _jwtSettings.ExpiryMinutes * 60,
+            Admin = new AdminInfoDto
+            {
+                AdminCode = admin.AdminCode,
+                Email = admin.Email,
+                Name = admin.Name,
+                Role = admin.Role.ToString()
+            }
+        };
+    }
+}

SPMS.Infrastructure/DependencyInjection.cs

@@ -25,6 +25,7 @@ public static class DependencyInjection
         services.AddScoped<IUnitOfWork, UnitOfWork>();
         services.AddScoped(typeof(IRepository<>), typeof(Repository<>));
         services.AddScoped<IServiceRepository, ServiceRepository>();
+        services.AddScoped<IAdminRepository, AdminRepository>();
 
         // External Services
         services.AddScoped<IJwtService, JwtService>();

SPMS.Infrastructure/Persistence/Repositories/AdminRepository.cs

@@ -0,0 +1,34 @@
+using Microsoft.EntityFrameworkCore;
+using SPMS.Domain.Entities;
+using SPMS.Domain.Interfaces;
+
+namespace SPMS.Infrastructure.Persistence.Repositories;
+
+public class AdminRepository : Repository<Admin>, IAdminRepository
+{
+    public AdminRepository(AppDbContext context) : base(context)
+    {
+    }
+
+    public async Task<Admin?> GetByEmailAsync(string email)
+    {
+        return await _dbSet
+            .FirstOrDefaultAsync(a => a.Email == email && !a.IsDeleted);
+    }
+
+    public async Task<Admin?> GetByAdminCodeAsync(string adminCode)
+    {
+        return await _dbSet
+            .FirstOrDefaultAsync(a => a.AdminCode == adminCode && !a.IsDeleted);
+    }
+
+    public async Task<bool> EmailExistsAsync(string email, long? excludeId = null)
+    {
+        var query = _dbSet.Where(a => a.Email == email && !a.IsDeleted);
+
+        if (excludeId.HasValue)
+            query = query.Where(a => a.Id != excludeId.Value);
+
+        return await query.AnyAsync();
+    }
+}