ChatMessageValidator: Require `published` field

lib/pleroma/web/activity_pub/builder.ex

@@ -17,7 +17,8 @@ def create(actor, object_id, recipients) do
        "actor" => actor.ap_id,
        "to" => recipients,
        "object" => object_id,
-       "type" => "Create"
+       "type" => "Create",
+       "published" => DateTime.utc_now() |> DateTime.to_iso8601()
      }, []}
   end
 
@@ -28,7 +29,8 @@ def chat_message(actor, recipient, content) do
        "actor" => actor.ap_id,
        "type" => "ChatMessage",
        "to" => [recipient],
-       "content" => content
+       "content" => content,
+       "published" => DateTime.utc_now() |> DateTime.to_iso8601()
      }, []}
   end
 

lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex

@@ -54,7 +54,7 @@ def changeset(struct, data) do
   def validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["ChatMessage"])
-    |> validate_required([:id, :actor, :to, :type, :content])
+    |> validate_required([:id, :actor, :to, :type, :content, :published])
     |> validate_length(:to, is: 1)
     |> validate_length(:content, max: Pleroma.Config.get([:instance, :remote_limit]))
     |> validate_local_concern()