Flag messages coming from the console for pipeline

This can be used by pipeline consumers to respond differently when they know the consumer is the console.

Author: kzu

src/WhatsApp/AzureFunctionsConsole.cs

@@ -50,6 +50,7 @@ public async Task<IActionResult> MessageConsole([HttpTrigger(AuthorizationLevel.
         // Try to deserialize the message sent by the console
         if (JsonSerializer.Deserialize(json, JsonContext.Default.Message) is Message message)
         {
+            message.FromConsole = true;
             // Await all responses
             // No action needed, just make sure all items are processed
             await handler.HandleAsync([message]).ToArrayAsync();

src/WhatsApp/MessageExtensions.cs

@@ -7,6 +7,15 @@ namespace Devlooped.WhatsApp;
 /// </summary>
 public static partial class MessageExtensions
 {
+    extension(IMessage message)
+    {
+        public bool FromConsole
+        {
+            get => (message.AdditionalProperties ??= []).TryGetValue("FromConsole", out var value) ? value as bool? ?? default : default;
+            set => (message.AdditionalProperties ??= [])["FromConsole"] = value;
+        }
+    }
+
     /// <summary>
     /// Creates a reaction response for the user message.
     /// </summary>

src/WhatsApp/WhatsApp.csproj

@@ -6,6 +6,7 @@
     <Description>WhatsApp agents for Azure Functions</Description>
     <PackageId>Devlooped.WhatsApp</PackageId>
     <PackContent>false</PackContent>
+    <LangVersion>Preview</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>