구현: W2 도메인·인프라·서비스 레이어

Domain 레이어:
- Enums: InquiryStatus (New/Contacted/Contracted/Closed)
- Enums: ServiceType (기장/종소세/부가세/양도세/증여상속/기타)
- Entities: Category, BlogPost, Inquiry, AdminUser (DB 매핑)
- Interfaces: IBlogPostRepository, ICategoryRepository, IInquiryRepository, IDbConnectionFactory

Infrastructure 레이어:
- DbConnectionFactory: PostgreSQL 연결 팩토리 (Npgsql)
- BlogPostRepository: GetBySlug, GetPublishedPaged, Create, Update, Delete, IncrementViewCount
- CategoryRepository: GetAll, GetBySlug
- InquiryRepository: Create, GetPaged, UpdateStatus
- NuGet 의존성: Dapper 2.1.15, Npgsql 8.0.1, Configuration, DependencyInjection
- DependencyInjection: AddInfrastructure() 확장 메서드

기술 결정:
- Dapper로 SQL 완전 제어
- PostgreSQL 다중 쿼리 (QueryMultiple) 페이징 최적화
- 한국어 파라미터 처리 (::int, ::text 타입 명시)

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

TaxBaik.Domain/Entities/AdminUser.cs

@@ -0,0 +1,10 @@
+namespace TaxBaik.Domain.Entities;
+
+public class AdminUser
+{
+    public int Id { get; set; }
+    public string Username { get; set; } = null!;
+    public string PasswordHash { get; set; } = null!;
+    public DateTime? LastLoginAt { get; set; }
+    public DateTime CreatedAt { get; set; }
+}

TaxBaik.Domain/Entities/BlogPost.cs

@@ -0,0 +1,23 @@
+namespace TaxBaik.Domain.Entities;
+
+public class BlogPost
+{
+    public int Id { get; set; }
+    public string Title { get; set; } = null!;
+    public string Content { get; set; } = null!;
+    public string Slug { get; set; } = null!;
+    public int? CategoryId { get; set; }
+    public string? Tags { get; set; }
+    public int? AuthorId { get; set; }
+    public DateTime? PublishedAt { get; set; }
+    public int ViewCount { get; set; }
+    public string? SeoTitle { get; set; }
+    public string? SeoDescription { get; set; }
+    public string? ThumbnailUrl { get; set; }
+    public bool IsPublished { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+
+    // Navigation property (populated via LEFT JOIN, not stored in DB)
+    public string? CategoryName { get; set; }
+}

TaxBaik.Domain/Entities/Category.cs

@@ -0,0 +1,9 @@
+namespace TaxBaik.Domain.Entities;
+
+public class Category
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = null!;
+    public string Slug { get; set; } = null!;
+    public int SortOrder { get; set; }
+}

TaxBaik.Domain/Entities/Inquiry.cs

@@ -0,0 +1,16 @@
+namespace TaxBaik.Domain.Entities;
+
+using TaxBaik.Domain.Enums;
+
+public class Inquiry
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = null!;
+    public string Phone { get; set; } = null!;
+    public string? Email { get; set; }
+    public string ServiceType { get; set; } = null!;
+    public string Message { get; set; } = null!;
+    public string Status { get; set; } = "new";
+    public string? IpAddress { get; set; }
+    public DateTime CreatedAt { get; set; }
+}

TaxBaik.Domain/Enums/InquiryStatus.cs

@@ -0,0 +1,9 @@
+namespace TaxBaik.Domain.Enums;
+
+public enum InquiryStatus
+{
+    New = 0,           // 새로운 문의
+    Contacted = 1,     // 연락 완료
+    Contracted = 2,    // 계약 체결
+    Closed = 3         // 종료
+}

TaxBaik.Domain/Enums/ServiceType.cs

@@ -0,0 +1,11 @@
+namespace TaxBaik.Domain.Enums;
+
+public enum ServiceType
+{
+    Bookkeeping = 0,       // 기장
+    IncomeTax = 1,         // 종소세
+    VatTax = 2,            // 부가세
+    CapitalGainsTax = 3,   // 양도세
+    GiftInheritanceTax = 4,// 증여·상속
+    Other = 5              // 기타
+}

TaxBaik.Domain/Interfaces/IBlogPostRepository.cs

@@ -0,0 +1,16 @@
+namespace TaxBaik.Domain.Interfaces;
+
+using TaxBaik.Domain.Entities;
+
+public interface IBlogPostRepository
+{
+    Task<BlogPost?> GetByIdAsync(int id, CancellationToken cancellationToken = default);
+    Task<BlogPost?> GetBySlugAsync(string slug, CancellationToken cancellationToken = default);
+    Task<(IEnumerable<BlogPost> Items, int Total)> GetPublishedPagedAsync(
+        int page, int pageSize, int? categoryId = null, CancellationToken cancellationToken = default);
+    Task<IEnumerable<BlogPost>> GetAllForAdminAsync(CancellationToken cancellationToken = default);
+    Task<int> CreateAsync(BlogPost post, CancellationToken cancellationToken = default);
+    Task UpdateAsync(BlogPost post, CancellationToken cancellationToken = default);
+    Task DeleteAsync(int id, CancellationToken cancellationToken = default);
+    Task IncrementViewCountAsync(int id, CancellationToken cancellationToken = default);
+}

TaxBaik.Domain/Interfaces/ICategoryRepository.cs

@@ -0,0 +1,9 @@
+namespace TaxBaik.Domain.Interfaces;
+
+using TaxBaik.Domain.Entities;
+
+public interface ICategoryRepository
+{
+    Task<IEnumerable<Category>> GetAllAsync(CancellationToken cancellationToken = default);
+    Task<Category?> GetBySlugAsync(string slug, CancellationToken cancellationToken = default);
+}

TaxBaik.Domain/Interfaces/IDbConnectionFactory.cs

@@ -0,0 +1,8 @@
+namespace TaxBaik.Domain.Interfaces;
+
+using System.Data;
+
+public interface IDbConnectionFactory
+{
+    IDbConnection CreateConnection();
+}

TaxBaik.Domain/Interfaces/IInquiryRepository.cs

@@ -0,0 +1,12 @@
+namespace TaxBaik.Domain.Interfaces;
+
+using TaxBaik.Domain.Entities;
+
+public interface IInquiryRepository
+{
+    Task<int> CreateAsync(Inquiry inquiry, CancellationToken cancellationToken = default);
+    Task<Inquiry?> GetByIdAsync(int id, CancellationToken cancellationToken = default);
+    Task<(IEnumerable<Inquiry> Items, int Total)> GetPagedAsync(
+        int page, int pageSize, string? status = null, CancellationToken cancellationToken = default);
+    Task UpdateStatusAsync(int id, string status, CancellationToken cancellationToken = default);
+}