Bot: added the Hidden nameflag

bot/ctx_call.go

@@ -111,6 +111,13 @@ func (ctx *Context) callCmd(ev interface{}) error {
 		}
 	}
 
+	// We call the messages later, since Hidden handlers will go into the Events
+	// slice, but we don't want to ignore those handlers either.
+	if evT == typeMessageCreate {
+		// safe assertion always
+		return ctx.callMessageCreate(ev.(*gateway.MessageCreateEvent))
+	}
+
 	return nil
 }
 

bot/nameflag.go

@@ -37,6 +37,11 @@ const (
 	// Using this flag inside the subcommand will drop all methods (this is an
 	// undefined behavior/UB).
 	Middleware
+
+	// H - Hidden, which tells the router to not add this into the list of
+	// commands, hiding it from Help. Handlers that are hidden will not have any
+	// arguments parsed. It will be treated as an Event.
+	Hidden
 )
 
 func ParseFlag(name string) (NameFlag, string) {
@@ -57,6 +62,8 @@ func ParseFlag(name string) (NameFlag, string) {
 			f |= GuildOnly
 		case 'M':
 			f |= Middleware
+		case 'H':
+			f |= Hidden
 		}
 	}
 

bot/subcommand.go

@@ -150,6 +150,10 @@ func (sub *Subcommand) Help(prefix, indent string, hideAdmin bool) string {
 		return ""
 	}
 
+	if len(sub.Commands) == 0 {
+		return ""
+	}
+
 	var subHelp string
 	if sub.Command != "" {
 		subHelp += indent + sub.Command
@@ -309,7 +313,7 @@ func (sub *Subcommand) parseCommands() error {
 		}
 
 		// TODO: allow more flexibility
-		if command.event != typeMessageCreate {
+		if command.event != typeMessageCreate || flag.Is(Hidden) {
 			sub.Events = append(sub.Events, &command)
 			continue
 		}