Function HandlerExists

context/handler.go:406–436

HandlerExists reports whether a handler exists in the "handlers" slice.

(handlers Handlers, handlerNameOrFunc any)

// HandlerExists reports whether a handler exists in the "handlers" slice.
func HandlerExists(handlers Handlers, handlerNameOrFunc any) bool {
	if handlerNameOrFunc == nil {
		return false
	}

	var matchHandler func(any) bool

	switch v := handlerNameOrFunc.(type) {
	case string:
		matchHandler = func(handler any) bool {
			return HandlerName(handler) == v
		}
	case Handler:
		handlerName := HandlerName(v)
		matchHandler = func(handler any) bool {
			return HandlerName(handler) == handlerName
		}
	default:
		matchHandler = func(handler any) bool {
			return reflect.TypeOf(handler) == reflect.TypeOf(v)
		}
	}

	for _, handler := range handlers {
		if matchHandler(handler) {
			return true
		}
	}

	return false
}