feat: finalize core modules and gateway

src/Infrastructure/TakeoutSaaS.Infrastructure/Common/Persistence/TenantAwareDbContext.cs

@@ -1,6 +1,7 @@
 using System.Reflection;
 using Microsoft.EntityFrameworkCore;
 using TakeoutSaaS.Shared.Abstractions.Entities;
+using TakeoutSaaS.Shared.Abstractions.Security;
 using TakeoutSaaS.Shared.Abstractions.Tenancy;
 
 namespace TakeoutSaaS.Infrastructure.Common.Persistence;
@@ -8,14 +9,12 @@ namespace TakeoutSaaS.Infrastructure.Common.Persistence;
 /// <summary>
 /// 多租户感知 DbContext：自动应用租户过滤并填充租户字段。
 /// </summary>
-public abstract class TenantAwareDbContext : DbContext
+public abstract class TenantAwareDbContext(
+    DbContextOptions options,
+    ITenantProvider tenantProvider,
+    ICurrentUserAccessor? currentUserAccessor = null) : AppDbContext(options, currentUserAccessor)
 {
-    private readonly ITenantProvider _tenantProvider;
-
-    protected TenantAwareDbContext(DbContextOptions options, ITenantProvider tenantProvider) : base(options)
-    {
-        _tenantProvider = tenantProvider;
-    }
+    private readonly ITenantProvider _tenantProvider = tenantProvider ?? throw new ArgumentNullException(nameof(tenantProvider));
 
     /// <summary>
     /// 当前请求租户 ID。
@@ -23,8 +22,18 @@ public abstract class TenantAwareDbContext : DbContext
     protected Guid CurrentTenantId => _tenantProvider.GetCurrentTenantId();
 
     /// <summary>
-    /// 应用租户过滤器至所有实现 <see cref="IMultiTenantEntity"/> 的实体。
+    /// 保存前填充租户元数据并执行基础处理。
     /// </summary>
+    protected override void OnBeforeSaving()
+    {
+        ApplyTenantMetadata();
+        base.OnBeforeSaving();
+    }
+
+    /// <summary>
+    /// 应用租户过滤器到所有实现 <see cref="IMultiTenantEntity"/> 的实体。
+    /// </summary>
+    /// <param name="modelBuilder">模型构建器。</param>
     protected void ApplyTenantQueryFilters(ModelBuilder modelBuilder)
     {
         foreach (var entityType in modelBuilder.Model.GetEntityTypes())
@@ -42,24 +51,20 @@ public abstract class TenantAwareDbContext : DbContext
         }
     }
 
+    /// <summary>
+    /// 为具体实体设置租户过滤器。
+    /// </summary>
+    /// <typeparam name="TEntity">实体类型。</typeparam>
+    /// <param name="modelBuilder">模型构建器。</param>
     private void SetTenantFilter<TEntity>(ModelBuilder modelBuilder)
         where TEntity : class, IMultiTenantEntity
     {
         modelBuilder.Entity<TEntity>().HasQueryFilter(entity => entity.TenantId == CurrentTenantId);
     }
 
-    public override int SaveChanges()
-    {
-        ApplyTenantMetadata();
-        return base.SaveChanges();
-    }
-
-    public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
-    {
-        ApplyTenantMetadata();
-        return base.SaveChangesAsync(cancellationToken);
-    }
-
+    /// <summary>
+    /// 为新增实体填充租户 ID。
+    /// </summary>
     private void ApplyTenantMetadata()
     {
         var tenantId = CurrentTenantId;
@@ -71,19 +76,5 @@ public abstract class TenantAwareDbContext : DbContext
                 entry.Entity.TenantId = tenantId;
             }
         }
-
-        var utcNow = DateTime.UtcNow;
-        foreach (var entry in ChangeTracker.Entries<IAuditableEntity>())
-        {
-            if (entry.State == EntityState.Added)
-            {
-                entry.Entity.CreatedAt = utcNow;
-                entry.Entity.UpdatedAt = null;
-            }
-            else if (entry.State == EntityState.Modified)
-            {
-                entry.Entity.UpdatedAt = utcNow;
-            }
-        }
     }
 }