Finish audit fixes

src/Shiny.Extensions.EntityFramework/Auditing/AuditEntry.cs

@@ -6,10 +6,9 @@ public class AuditEntry
 {
     public int Id { get; set; }
     public string EntityId { get; set; }
-    public string EntityType { get; set; }
+    public string TableName { get; set; }
 
     public string? UserIdentifier { get; set; }
-    public string? Tenant { get; set; }
     public string? AppLocation { get; set; }
     public string? UserIpAddress { get; set; }
 

src/Shiny.Extensions.EntityFramework/Auditing/AuditSaveChangesInterceptor.cs

@@ -1,8 +1,4 @@
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.ChangeTracking;
 using Microsoft.EntityFrameworkCore.Diagnostics;
-using System.Linq;
-using System.Text.Json;
 
 namespace Shiny.Auditing;
 
@@ -11,114 +7,32 @@ namespace Shiny.Auditing;
 // TODO: catch ExecuteUpdate & ExecuteDelete - how?  ExecuteDelete isn't something I believe in with audited tables anyhow - So only ExecuteUpdate
 public class AuditSaveChangesInterceptor(IAuditInfoProvider provider) : SaveChangesInterceptor
 {
+    AuditScope? auditScope;
+
     public override ValueTask<InterceptionResult<int>> SavingChangesAsync(DbContextEventData eventData, InterceptionResult<int> result, CancellationToken cancellationToken = default)
     {
-        var entries = this.GetAuditEntries(eventData);
-        eventData.Context!.AddRange(entries);        
+        this.auditScope = AuditScope.Create(provider, eventData);   
         return base.SavingChangesAsync(eventData, result, cancellationToken);
     }
 
     public override InterceptionResult<int> SavingChanges(DbContextEventData eventData, InterceptionResult<int> result)
     {
-        var entries = this.GetAuditEntries(eventData);
-        eventData.Context!.AddRange(entries);        
+        this.auditScope = AuditScope.Create(provider, eventData);  
         return base.SavingChanges(eventData, result);
     }
-
-
-    static DbOperation ToOperation(EntityState state)
-    {
-        if (state == EntityState.Added)
-            return DbOperation.Insert;
-
-        if (state == EntityState.Deleted)
-            return DbOperation.Delete;
-
-        return DbOperation.Update;
-    }
-
-
-    protected virtual List<AuditEntry> GetAuditEntries(DbContextEventData eventData)
-    {
-        var entries = new List<AuditEntry>();
-        var changeTracker = eventData.Context!.ChangeTracker;
-        changeTracker.DetectChanges();
-
-        foreach (var entry in changeTracker.Entries())
-        {
-            // Dot not audit entities that are not tracked, not changed, or not of type IAuditable
-            if (entry.State != EntityState.Detached && 
-                entry.State != EntityState.Unchanged &&
-                entry.Entity is IAuditable auditable)
-            {
-                if (entry.State == EntityState.Modified)
-                {
-                    entry.CurrentValues[nameof(IAuditable.DateUpdated)] = DateTimeOffset.UtcNow;
-                }
-                else if (entry.State == EntityState.Added)
-                {
-                    entry.CurrentValues[nameof(IAuditable.DateUpdated)] = DateTimeOffset.UtcNow;
-                    entry.CurrentValues[nameof(IAuditable.DateCreated)] = DateTimeOffset.UtcNow;
-                }
-
-                entry.CurrentValues[nameof(IAuditable.LastEditUserIdentifier)] = provider.UserIdentifier;
-                var auditEntry = new AuditEntry
-                {
-                    Operation = ToOperation(entry.State),
-                    EntityId = entry.Properties.Single(p => p.Metadata.IsPrimaryKey()).CurrentValue!.ToString()!,
-                    EntityType = entry.Metadata.ClrType.Name,
-                    Timestamp = DateTime.UtcNow,
-                    ChangeSet = this.CalculateChangeSet(entry), // TODO: NULL on add
-
-                    UserIdentifier = provider.UserIdentifier,
-                    UserIpAddress = provider.UserIpAddress,
-                    Tenant = provider.Tenant,
-                    AppLocation = provider.AppLocation
-                };
-                entries.Add(auditEntry);
-            }
-        }
-        return entries;
-    }
-
 
-    protected virtual JsonDocument CalculateChangeSet(EntityEntry entry)
-    {
-        // TODO: if I'm deleting, I want all the original values (even ignored?)
-        var dict = new Dictionary<string, object>();
-        foreach (var property in entry.Properties)
-        {
-            if (this.IsAuditedProperty(property))
-            {
-                dict.Add(property.Metadata.Name, property.OriginalValue ?? "NULL");
-            }
-        }
-
-        var json = JsonSerializer.SerializeToDocument(dict);
-        return json;
-    }
 
-
-    protected virtual bool IsAuditedProperty(PropertyEntry entry)
+    public override async ValueTask<int> SavedChangesAsync(SaveChangesCompletedEventData eventData, int result, CancellationToken cancellationToken = default)
     {
-        if (!entry.IsModified)
-            return false;
-
-        if (entry.OriginalValue is byte[])
-            return false;
-
-        if (this.IsPropertyIgnored(entry.Metadata.Name))
-            return false;
+        if (this.auditScope != null)
+            await this.auditScope.Commit(cancellationToken);
 
-        return true;
+        return await base.SavedChangesAsync(eventData, result, cancellationToken);
     }
 
-
-    protected virtual bool IsPropertyIgnored(string propertyName) => propertyName switch
+    public override int SavedChanges(SaveChangesCompletedEventData eventData, int result)
     {
-        nameof(IAuditable.LastEditUserIdentifier) => true,
-        nameof(IAuditable.DateCreated) => true,
-        nameof(IAuditable.DateUpdated) => true,
-        _ => false
-    };
+        this.auditScope?.Commit();
+        return base.SavedChanges(eventData, result);
+    }
 }

src/Shiny.Extensions.EntityFramework/Auditing/AuditScope.cs

@@ -0,0 +1,170 @@
+using System.Linq;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.ChangeTracking;
+using Microsoft.EntityFrameworkCore.Diagnostics;
+
+namespace Shiny.Auditing;
+
+public class AuditScope
+{
+    readonly List<EntityAuditContext> entries;
+    readonly DbContext data;
+
+
+    AuditScope(DbContext data, List<EntityAuditContext> entries)
+    {
+        this.data = data;
+        this.entries = entries;
+    }
+
+
+    public static AuditScope Create(IAuditInfoProvider provider, DbContextEventData eventData)
+    {
+        var state = AuditScope.BuildState(provider, eventData);
+        var scope = new AuditScope(eventData.Context!, state);
+        return scope;
+    }
+
+
+    public async ValueTask Commit(CancellationToken cancellationToken)
+    {
+        if (this.entries.Count == 0)
+            return;
+
+        this.CompleteAudit();
+        await this.data.SaveChangesAsync(cancellationToken);
+    }
+
+
+    public void Commit()
+    {
+        if (this.entries.Count == 0)
+            return;
+
+        this.CompleteAudit();
+        this.data.SaveChanges();
+    }
+
+
+    void CompleteAudit()
+    {
+        foreach (var entry in this.entries)
+        {
+            entry.CurrentAudit.EntityId = GetPrimaryKey(entry.Entry);
+            this.data.Add(entry.CurrentAudit);
+        }
+    }
+
+
+    static string GetPrimaryKey(EntityEntry entry)
+    {
+        var meta = entry.Properties.Where(x => x.Metadata.IsPrimaryKey()).ToList();
+        if (meta.Count == 1)
+            return meta.First().CurrentValue!.ToString()!;
+
+        var primaryKeys = new string[meta.Count];
+        for (var i = 0; i < meta.Count; i++)
+        {
+            var key = meta[i];
+            primaryKeys[i] = $"{key.Metadata.Name}-{key.CurrentValue!}";
+        }
+
+        var result = String.Join('_', primaryKeys);
+        return result;
+    }
+
+    static DbOperation ToOperation(EntityState state)
+    {
+        if (state == EntityState.Added)
+            return DbOperation.Insert;
+
+        if (state == EntityState.Deleted)
+            return DbOperation.Delete;
+
+        return DbOperation.Update;
+    }
+
+
+    static List<EntityAuditContext> BuildState(IAuditInfoProvider provider, DbContextEventData eventData)
+    {
+        var entries = new List<EntityAuditContext>();
+        var changeTracker = eventData.Context!.ChangeTracker;
+        changeTracker.DetectChanges();
+
+        foreach (var entry in changeTracker.Entries())
+        {
+            if (entry.State != EntityState.Detached && 
+                entry.State != EntityState.Unchanged &&
+                entry.Entity is IAuditable)
+            {
+                if (entry.State == EntityState.Modified)
+                {
+                    entry.CurrentValues[nameof(IAuditable.DateUpdated)] = DateTimeOffset.UtcNow;
+                }
+                else if (entry.State == EntityState.Added)
+                {
+                    entry.CurrentValues[nameof(IAuditable.DateUpdated)] = DateTimeOffset.UtcNow;
+                    entry.CurrentValues[nameof(IAuditable.DateCreated)] = DateTimeOffset.UtcNow;
+                }
+                entry.CurrentValues[nameof(IAuditable.LastEditUserIdentifier)] = provider.UserIdentifier;
+
+                var auditEntry = new AuditEntry
+                {
+                    Operation = ToOperation(entry.State),
+                    TableName = entry.Metadata.GetTableName()!,
+                    Timestamp = DateTime.UtcNow,
+                    ChangeSet = CalculateChangeSet(entry), // what about post values?
+
+                    UserIdentifier = provider.UserIdentifier,
+                    UserIpAddress = provider.UserIpAddress,
+                    AppLocation = provider.AppLocation
+                };
+                entries.Add(new EntityAuditContext(entry, auditEntry));
+            }
+        }
+        return entries;
+    }
+
+
+    static JsonDocument CalculateChangeSet(EntityEntry entry)
+    {
+        var dict = new Dictionary<string, object>();
+        foreach (var property in entry.Properties)
+        {
+            if (IsAuditedProperty(property) && (entry.State == EntityState.Deleted || property.IsModified))
+            {
+                dict.Add(property.Metadata.Name, property.OriginalValue ?? "NULL");
+            }
+        }
+
+        var json = JsonSerializer.SerializeToDocument(dict);
+        return json;
+    }
+
+
+    static bool IsAuditedProperty(PropertyEntry entry)
+    {
+        if (entry.OriginalValue is byte[])
+            return false;
+
+        if (IsPropertyIgnored(entry.Metadata.Name))
+            return false;
+
+        return true;
+    }
+
+
+    static bool IsPropertyIgnored(string propertyName) => propertyName switch
+    {
+        nameof(IAuditable.LastEditUserIdentifier) => true,
+        nameof(IAuditable.DateCreated) => true,
+        nameof(IAuditable.DateUpdated) => true,
+        _ => false
+    };    
+}
+
+public record EntityAuditContext(
+    EntityEntry Entry,
+    AuditEntry CurrentAudit
+);

src/Shiny.Extensions.EntityFramework/Auditing/IAuditInfoProvider.cs

@@ -7,11 +7,6 @@ public interface IAuditInfoProvider
     /// </summary>
     string? AppLocation { get; }
 
-    /// <summary>
-    /// For multi-tenanted apps if available
-    /// </summary>
-    string? Tenant { get; }
-
     /// <summary>
     /// Your user ID or name if available
     /// </summary>
@@ -21,4 +16,7 @@ public interface IAuditInfoProvider
     /// The IP address of the remote user if available
     /// </summary>
     string? UserIpAddress { get; }
+
+
+    // IDictionary<string, object> AdditionalProperties { get; }
 }

src/Shiny.Extensions.EntityFramework/EntityFrameworkExtensions.cs

@@ -36,14 +36,13 @@ public static ModelBuilder MapAuditing(this ModelBuilder modelBuilder)
         map.HasKey(x => x.Id);
         map.Property(x => x.Id).ValueGeneratedOnAdd();
         map.Property(x => x.EntityId).HasMaxLength(100);
-        map.Property(x => x.EntityType).HasMaxLength(255);
+        map.Property(x => x.TableName).HasMaxLength(255);
         map.Property(x => x.Operation);
         map.Property(x => x.Timestamp);
         map.Property(x => x.ChangeSet);
 
         map.Property(x => x.UserIdentifier).HasMaxLength(50);
         map.Property(x => x.UserIpAddress).HasMaxLength(39);
-        map.Property(x => x.Tenant).HasMaxLength(50);
         map.Property(x => x.AppLocation).HasMaxLength(1024);
 
         return modelBuilder;

tests/Shiny.Extensions.EntityFramework.Tests/AuditTests.cs

@@ -18,11 +18,15 @@ public AuditTests()
         this.auditProvider = new();
 
         var services = new ServiceCollection();
-        services.AddDbContext<TestDbContext>(x => x
+        services.AddSingleton<IAuditInfoProvider>(this.auditProvider);
+        services.AddScoped<AuditSaveChangesInterceptor>();
+        services.AddDbContext<TestDbContext>((sp, opts) =>
+        {
             // .UseSqlite("Data Source=test.db")
-            .UseNpgsql(new NpgsqlDataSourceBuilder("User ID=sa;Password=Blargh911!;Host=localhost;Port=5432;Database=AuditUnitTests;Pooling=true;Connection Lifetime=30;").Build())
-            .AddInterceptors(new AuditSaveChangesInterceptor(this.auditProvider))
-        );
+            opts.UseNpgsql(new NpgsqlDataSourceBuilder("User ID=sa;Password=Blargh911!;Host=localhost;Port=5432;Database=AuditUnitTests;Pooling=true;Connection Lifetime=30;").Build());
+            var interceptor = sp.GetRequiredService<AuditSaveChangesInterceptor>();
+            opts.AddInterceptors(interceptor);
+        });
         this.serviceProvider = services.BuildServiceProvider();
 
         using var scope = this.serviceProvider.CreateScope();
@@ -75,8 +79,8 @@ await this.DoDb(async data =>
             var audit = await data.AuditEntries.FirstOrDefaultAsync(x => x.Operation == DbOperation.Delete);
             audit.Should().NotBeNull("No Delete Audit Found");
             AssertAudit(audit!, DbOperation.Delete);
-            
-            // TODO: check changeset
+
+            audit!.ChangeSet.RootElement.GetProperty("Name").GetString().Should().Be("Cadillac");
         });
     }
 
@@ -97,7 +101,7 @@ await this.DoDb(async data =>
             audit.Should().NotBeNull("No Delete Audit Found");
             AssertAudit(audit!, DbOperation.Update);
             
-            // TODO: check changeset
+            audit!.ChangeSet.RootElement.GetProperty("Name").GetString().Should().Be("Cadillac");
         });        
     }