/* vi: set ts=2:
 +-------------------+  Christian Schlittchen <corwin@amber.kn-bremen.de>
 |                   |  Enno Rehling <enno@eressea.de>
 | Eressea PBEM host |  Katja Zedel <katze@felidae.kn-bremen.de>
 | (c) 1998 - 2003   |  Henning Peters <faroul@beyond.kn-bremen.de>
 |                   |  Ingo Wilken <Ingo.Wilken@informatik.uni-oldenburg.de>
 +-------------------+  Stefan Reich <reich@halbling.de>

 This program may not be used, modified or distributed 
 without prior permission by the authors of Eressea.
*/
#ifndef UTIL_MESSAGE_H
#define UTIL_MESSAGE_H

#include "variant.h"

#ifdef __cplusplus
extern "C" {
#endif

  struct locale;

  typedef struct arg_type {
    struct arg_type *next;
    variant_type vtype;
    const char *name;
    void (*release) (variant);
     variant(*copy) (variant);
  } arg_type;

  typedef struct message_type {
    unsigned int key;
    const char *name;
    int nparameters;
    const char **pnames;
    const struct arg_type **types;
  } message_type;

  typedef struct message {
    const struct message_type *type;
    variant *parameters;
    int refcount;
  } message;

  extern struct message_type *mt_new(const char *name, const char **args);
  extern struct message_type *mt_new_va(const char *name, ...);
  /* mt_new("simple_sentence", "subject:string", "predicate:string", 
   *        "object:string", "lang:locale", NULL); */

  extern struct message *msg_create(const struct message_type *type,
    variant args[]);
  /* msg_create(&mt_simplesentence, "enno", "eats", "chocolate", &locale_de); 
   * parameters must be in the same order as they were for mt_new! */

  extern void msg_release(struct message *msg);
  extern struct message *msg_addref(struct message *msg);

  extern const char *mt_name(const struct message_type *mtype);

/** message_type registry (optional): **/
  extern const struct message_type *mt_register(struct message_type *);
  extern const struct message_type *mt_find(const char *);

  extern void register_argtype(const char *name, void (*free_arg) (variant),
    variant(*copy_arg) (variant), variant_type);
  extern const struct arg_type *find_argtype(const char *name);

  extern void (*msg_log_create) (const struct message * msg);

#ifdef __cplusplus
}
#endif
#endif