Make all catalog product events have same name id. (#10)

* Make all catalog product events have same name id.

This should be useful for stream processing in flink,
because we can then key a stream with these events on the productId
more easily.

* Add product bought event, which is published for each product.

This makes it easier to check whether a product is being oversold.

* Allow for setting the catalog item id through API call.

Previously the entity framework API did have a counter in place,
ignoring the id that was send in the catalog api request.

src/Services/Catalog/Catalog.API/Controllers/CatalogController.cs

@@ -264,11 +264,13 @@ public class CatalogController : ControllerBase
     {
         var item = new CatalogItem
         {
+            Id = product.Id,
             CatalogBrandId = product.CatalogBrandId,
             CatalogTypeId = product.CatalogTypeId,
             Description = product.Description,
             Name = product.Name,
             PictureFileName = product.PictureFileName,
+            AvailableStock = product.AvailableStock,
             Price = product.Price
         };
 
@@ -285,7 +287,7 @@ public class CatalogController : ControllerBase
             CatalogType = item.CatalogType,
             CatalogTypeId = item.CatalogTypeId,
             Description = item.Description,
-            Id = item.Id,
+            ProductId = item.Id,
             MaxStockThreshold = item.MaxStockThreshold,
             Name = item.Name,
             OnReorder = item.OnReorder

src/Services/Catalog/Catalog.API/Infrastructure/EntityConfigurations/CatalogItemEntityTypeConfiguration.cs

@@ -8,7 +8,6 @@ class CatalogItemEntityTypeConfiguration
         builder.ToTable("Catalog");
 
         builder.Property(ci => ci.Id)
-            .UseHiLo("catalog_hilo")
             .IsRequired();
 
         builder.Property(ci => ci.Name)

src/Services/Catalog/Catalog.API/IntegrationEvents/Events/ProductCreatedIntegrationEvent.cs

@@ -2,7 +2,7 @@ namespace Microsoft.eShopOnContainers.Services.Catalog.API.IntegrationEvents.Eve
 
 public record ProductCreatedIntegrationEvent : IntegrationEvent
 {
-    public int Id { get; set; }
+    public int ProductId { get; set; }
 
     public string Name { get; set; }
 

src/Services/Ordering/Ordering.API/Application/DomainEventHandlers/OrderPaid/OrderStatusChangedToPaidDomainEventHandler.cs

@@ -39,6 +39,15 @@ public class OrderStatusChangedToPaidDomainEventHandler
             buyer.Name,
             orderStockList);
 
+        foreach (var orderStockItem in orderStockList)
+        {
+            var productBoughtEvent = new ProductBoughtIntegrationEvent(
+                orderStockItem.ProductId,
+                orderStockItem.Units
+            );
+            await _orderingIntegrationEventService.AddAndSaveEventAsync(productBoughtEvent);
+        }
+
         await _orderingIntegrationEventService.AddAndSaveEventAsync(orderStatusChangedToPaidIntegrationEvent);
     }
 }

src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/ProductBoughtIntegrationEvent.cs

@@ -0,0 +1,13 @@
+namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.IntegrationEvents.Events;
+
+public record ProductBoughtIntegrationEvent : IntegrationEvent
+{
+    public int ProductId { get; }
+    public int Units { get; }
+
+    public ProductBoughtIntegrationEvent(int productId, int units)
+    {
+        ProductId = productId;
+        Units = units;
+    }
+}