Invoice handling with versioning and item updates

Distribution/Features/Invoice/InvoiceRepository.cs

@@ -10,6 +10,8 @@ public class InvoiceRepository(AppDBContext context) : IInvoiceRepository
         await context.Invoices
             .Include(i => i.ShopPO).ThenInclude(p => p.Store)
             .Include(i => i.ShopPO).ThenInclude(p => p.Items.Where(x => x.IsActive))
+            .Include(i => i.Items.Where(x => x.IsActive)).ThenInclude(x => x.Item)
+            .Include(i => i.Items.Where(x => x.IsActive)).ThenInclude(x => x.ShopPOItem)
             .Include(i => i.Payments.Where(p => p.IsActive))
             .FirstOrDefaultAsync(i => i.Id == id && i.IsActive);
 
@@ -52,6 +54,27 @@ public class InvoiceRepository(AppDBContext context) : IInvoiceRepository
     public async Task AddAsync(Models.Invoice invoice) =>
         await context.Invoices.AddAsync(invoice);
 
+    public async Task<Models.Item?> GetItemAsync(Guid itemId) =>
+        await context.Items.FirstOrDefaultAsync(i => i.Id == itemId && i.IsActive);
+
+    public async Task AddItemsAsync(IEnumerable<InvoiceItem> items) =>
+        await context.InvoiceItems.AddRangeAsync(items);
+
+    public async Task AddVersionAsync(InvoiceVersion version) =>
+        await context.InvoiceVersions.AddAsync(version);
+
+    public async Task<int> GetLatestVersionNumberAsync(Guid invoiceId) =>
+        await context.InvoiceVersions
+            .Where(v => v.FK_InvoiceId == invoiceId)
+            .MaxAsync(v => (int?)v.VersionNumber) ?? 0;
+
+    public async Task<List<InvoiceVersion>> GetVersionsAsync(Guid invoiceId) =>
+        await context.InvoiceVersions
+            .Include(v => v.Items).ThenInclude(i => i.Item)
+            .Where(v => v.FK_InvoiceId == invoiceId && v.IsActive)
+            .OrderBy(v => v.VersionNumber)
+            .ToListAsync();
+
     public void Update(Models.Invoice invoice) =>
         context.Invoices.Update(invoice);
 }