feat: add repository layer with IUnitOfWork and fixed EF base

- ITransaction, IUnitOfWork in DAL.Abstract - EfTransactionAdapter, EfUnitOfWork<TDbContext>, NotificationUnitOfWork in DAL.EF - NotificationEfRepository<TEntity>: async-only base, fixed Exists (AnyAsync), fixed batch Add (AddRangeAsync), single SaveChangesAsync per operation - TemplateRepository, ProviderRepository, ProviderUsageRepository - ProviderUsageRepository.IncrementAsync uses atomic PostgreSQL upsert - ProviderRepository deserializes settings polymorphically via ProviderType discriminator Ref: IT-628 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-05-01 23:18:41 +03:00
parent 26b29d169e
commit 4f573da374
9 changed files with 381 additions and 0 deletions
@@ -0,0 +1,74 @@
+using HrynCo.NotificationService.DAL.Abstract;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage;
+
+namespace HrynCo.NotificationService.DAL.EF.Core;
+
+internal abstract class EfUnitOfWork<TDbContext> : IUnitOfWork
+    where TDbContext : DbContext
+{
+    private readonly TDbContext _context;
+    private EfTransactionAdapter? _currentTransaction;
+
+    protected EfUnitOfWork(TDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<ITransaction> BeginTransactionAsync(CancellationToken cancellationToken = default)
+    {
+        if (_currentTransaction != null)
+            return _currentTransaction;
+
+        IDbContextTransaction tx = await _context.Database.BeginTransactionAsync(cancellationToken);
+        _currentTransaction = new EfTransactionAdapter(tx);
+        return _currentTransaction;
+    }
+
+    public ITransaction? GetCurrentTransaction() => _currentTransaction;
+
+    public async Task ExecuteInTransactionAsync(Func<Task> action)
+    {
+        ITransaction? existing = GetCurrentTransaction();
+        bool ownsTransaction = existing is null;
+        ITransaction tx = existing ?? await BeginTransactionAsync();
+
+        try
+        {
+            await action();
+            if (ownsTransaction) await tx.CommitAsync();
+        }
+        catch
+        {
+            if (ownsTransaction) await tx.RollbackAsync();
+            throw;
+        }
+        finally
+        {
+            if (ownsTransaction) await tx.DisposeAsync();
+        }
+    }
+
+    public async Task<TResult> ExecuteInTransactionAsync<TResult>(Func<Task<TResult>> action)
+    {
+        ITransaction? existing = GetCurrentTransaction();
+        bool ownsTransaction = existing is null;
+        ITransaction tx = existing ?? await BeginTransactionAsync();
+
+        try
+        {
+            TResult result = await action();
+            if (ownsTransaction) await tx.CommitAsync();
+            return result;
+        }
+        catch
+        {
+            if (ownsTransaction) await tx.RollbackAsync();
+            throw;
+        }
+        finally
+        {
+            if (ownsTransaction) await tx.DisposeAsync();
+        }
+    }
+}