#define MESSAGE_LENGTH 256
#define COMMAND_LENGTH 16

typedef enum {
  Message = 1,
  Login,
  Logout,
  Hearbeat,
  List_clients,
  Mute,
  Unmute,
  Signal
} CommandType;

typedef enum {
    ACK_ACCEPTED = 0,
    ACK_DELIVERED,
    ERR_UNKNOWN_COMMAND,
    ERR_NOT_LOGGED_IN,
    ERR_ALREADY_LOGGED_IN,
    ERR_USER_NOT_FOUND,
    ERR_USER_MUTED,
    ERR_INVALID_FORMAT
} Signal_t;

typedef struct {
  CommandType mtype;
  Signal_t stype; // Used with mtype = signal. Responses from the server - to specify errors or acks
  char sender[COMMAND_LENGTH]; // Who sent the message
  char command[COMMAND_LENGTH]; // Functions as an attribute to mtype -
                                // nicknames, id to send/mute to
  char message[MESSAGE_LENGTH]; // Actual message content
} msgbuf_t;