This is a lot, harder than it should be. The good news is we have a plan to refactor the notifications to make it easier in the future, but for the time being you will need to create your own notification "Monitor" in your solution - changing the namespace and the class name. The monitor will resolve so there is no need to modify the Merchello source.

You can use https://github.com/Merchello/Merchello/blob/merchello-dev/src/Merchello.Core/Gateways/Notification/Monitors/OrderConfirmationMonitor.cs as a starting spot.

Update the attribute that decorates the class. Create a new GUID and update the first property of the attribute. Merchello uses this internally to create a relationship between the monitor and your message.

You should also change the name (last property) so that it is easy to identify in the Merchello back office.

  [MonitorFor("[NEW GUID HERE]", typeof(OrderConfirmationTrigger), "YOUR NAME HERE (Pattern Replace)")]

Since you need to add the offer in the iteration, you can't just add a new pattern so you need to generate the keys for the pattern match.

Here is the extension Merchello uses as a reference : https://github.com/Merchello/Merchello/blob/merchello-dev/src/Merchello.Core/Models/LineItemExtensions.cs#L428

You could write your own to supplement Merchello's ... so something like

 public static IEnumerable<IReplaceablePattern> OfferLineItemReplaceablePatterns(this ILineItemContainer container)  
 {
       var patterns = new List<IReplaceablePattern>();
       var token = "Invoice.Items";

       var iterateItems =
            container.Items.Where(
                x => x.LineItemType == LineItemType.Product || x.LineItemType == LineItemType.Custom).ToArray();

       for (var i = 0; i < iterateItems.Count(); i++)
        {
               offerText = iterateItems[i].extendedData.GetValue("offer");

               if (!string.IsNullOrWhitespace(offerText)) {
                    var offerReplace = new ReplaceablePattern(string.Format("{0}.{1}.{2}", token, "Offer", i), string.Format("{0}Item.Offer.{1}{2}", "{{", i, "}}"), offerText);
                   patterns.Add(offerReplace);
               }
        }

       return patterns.Where(x => x != null);
 }

Finally, back in the monitor you created, in the body of the OnNext method somewhere after the formatter is instantiated:

add the line

   formatter.AddOrUpdateReplaceablePattern(value.Invoice.OfferLineItemReplaceablePatterns());

Hi Rusty,

Thanks for your response.

I am getting following compilation error.

Server Error in '/' Application. Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0117: 'Merchello.Core.Formatters.PatternReplaceFormatter' does not contain a definition for 'GetPatternReplaceFormatter'

Source Error:

Line 36: Line 37: if (!Messages.Any()) return; Line 38: var formatter = PatternReplaceFormatter.GetPatternReplaceFormatter(); Line 39: // Add the replaceable patterns from the invoice Line 40: formatter.AddOrUpdateReplaceablePattern(value.Invoice.ReplaceablePatterns(value.CurrencySymbol));

is working on a reply...