feat: add in ability to supply custom command matching interface

command_group.go

@@ -28,6 +28,11 @@ func (g *CommandGroup) AddCommand(definition *CommandDefinition) {
 	g.commands = append(g.commands, newCommand(definition))
 }
 
+func (g *CommandGroup) AddCustomCommand(cmd Command) {
+	cmd.Definition().Command = strings.TrimSpace(fmt.Sprintf("%s %s", g.prefix, cmd.Definition().Command))
+	g.commands = append(g.commands, cmd)
+}
+
 // PrependCommand define a new command and prepend it to the list of group bot commands
 func (g *CommandGroup) PrependCommand(definition *CommandDefinition) {
 	definition.Command = strings.TrimSpace(fmt.Sprintf("%s %s", g.prefix, definition.Command))

slacker.go

@@ -163,6 +163,14 @@ func (s *Slacker) AddCommand(definition *CommandDefinition) {
 	s.commandGroups[0].AddCommand(definition)
 }
 
+func (s *Slacker) AddCustomCommand(cmd Command) {
+	if len(cmd.Definition().Command) == 0 {
+		s.logger.Error("missing `Command`")
+		return
+	}
+	s.commandGroups[0].AddCustomCommand(cmd)
+}
+
 // AddCommandMiddleware appends a new command middleware to the list of root level command middlewares
 func (s *Slacker) AddCommandMiddleware(middleware CommandMiddlewareHandler) {
 	s.commandMiddlewares = append(s.commandMiddlewares, middleware)