enum action {
  nop = 0,

  update,

  ACTION_MAX,
};

enum element_e {
  ELEMENT_INVALID  = 0,

#define ELEMENT(identifier, _function, _arg, _minutes, _seconds) \
  ELEMENT_##identifier,
#include "config.def.h"
#undef ELEMENT

  ELEMENT_MAX,
};

const char* element_str[] = {
  [ELEMENT_INVALID] = "ELEMENT_INVALID",

#define ELEMENT(identifier, _function, _arg, _minutes, _seconds) \
  [ELEMENT_##identifier] = "ELEMENT_" #identifier,
#include "config.def.h"
#undef ELEMENT
};

struct message_t {
  enum element_e element;
  enum action action;
};