/*	Public domain	*/

#define CGI_SESSION_ID_MAX		33
#define CGI_SESSION_VAR_KEY_MAX		32
#define CGI_SESSION_VAR_VALUE_MAX	1024
#define CGI_SESSION_DATA_MAGIC		0x50657243
#define CGI_SESSION_VARIABLES_MAX	100
#define CGI_SESSION_DATA_MAX		4096

struct cgi_session;

typedef struct cgi_session_ops {
	const char *name;			/* Session class name */
	size_t size;				/* Structure size */
	Uint flags;
#define CGI_SESSION_PREFORK_AUTH 0x01	/* Call auth() before fork() */
	time_t sessTimeout;		/* Session inactivity timeout (s) */
	time_t workerTimeout;		/* Worker inactivity timeout (s) */

	void (*init)(void *);
	void (*destroy)(void *);
	int  (*load)(void *, int fd);
	void (*save)(void *, int fd);
	int  (*auth)(void *, const char *u, const char *p);
	void (*authChallenge)(CGI_Query *q);	const char *authChallengeName;
	void (*authRegister)(CGI_Query *q);	const char *authRegisterName;
	void (*authRegConfirm)(CGI_Query *q);	const char *authRegConfirmName;
	void (*authAssist)(CGI_Query *q);	const char *authAssistName;
	void (*authRequest)(CGI_Query *q);	const char *authRequestName;
	void (*authConfirm)(CGI_Query *q);	const char *authConfirmName;
	void (*authCommit)(CGI_Query *q);	const char *authCommitName;
	void (*authCmd)(CGI_Query *q);		const char *authCmdName;
	int  (*sessOpen)(void *s, const char *user);
	void (*sessRestored)(void *s, const char *user);
	void (*sessClose)(void *s);
	void (*sessExpired)(void *s);
	void (*beginQueryUnauth)(CGI_Query *q, const char *op);
	void (*loginPage)(CGI_Query *q);
	void (*logout)(CGI_Query *q);
	void (*addSelectFDs)(void *s, fd_set *rd, fd_set *wr, int *maxfds);
	void (*procSelectFDs)(void *s, fd_set *rd, fd_set *wr);
} CGI_SessionOps;

typedef struct cgi_session_var {
	char key[CGI_SESSION_VAR_KEY_MAX];	/* Variable name */
	char value[CGI_SESSION_VAR_VALUE_MAX];	/* Variable value */
	TAILQ_ENTRY(cgi_session_var) vars;
} CGI_SessionVar;

typedef struct cgi_session {
	CGI_SessionOps *ops;			/* Operations */
	char id[CGI_SESSION_ID_MAX];		/* Session identifier */
	TAILQ_HEAD(, cgi_session_var) vars;	/* Session variables */
	TAILQ_ENTRY(cgi_session) sessions;
	pid_t worker;				/* Spawned worker PID */
	int pp[2];				/* Status pipe */
} CGI_Session;

#define CGISESSION(p) ((CGI_Session *)(p))

TAILQ_HEAD(cgi_sessionq, cgi_session);

typedef int (*CGI_SessionAuthFn)(void *, CGI_Query *, const char *,
                                 const char *);

__BEGIN_DECLS
int		 CGI_SessionMgrInit(void);
void		 CGI_SessionMgrDestroy(void);

void             CGI_SessionInit(CGI_Session *, CGI_SessionOps *);
void             CGI_SessionDestroy(CGI_Session *);
void		 CGI_CloseSession(CGI_Session *);

int		 CGI_SessionLoad(void *, int);
int		 CGI_SessionSaveToFD(void *, int);
#define		 CGI_SessionSave(sess) CGI_SessionSaveToFD((sess),-1)

int  CGI_SetSV_ALL(CGI_SessionOps *, const char *, const char *, const char *);
void CGI_SetSV(void *, const char *, const char *, ...);
void CGI_SetSV_S(void *, const char *, const char *);

int  CGI_ExecQuery(CGI_Query *, CGI_SessionOps *);
void CGI_ProcessQuery(CGI_Query *, CGI_SessionOps *);

/* Return the value of a session variable (or "" if it doesn't exists) */
static __inline__ const char *
CGI_GetSV(void *pSess, const char *key)
{
	CGI_Session *sess = pSess;
	CGI_SessionVar *var;

	TAILQ_FOREACH(var, &sess->vars, vars) {
		if (strcmp(var->key, key) == 0)
			break;
	}
	if (var != NULL) {
		return (var->value);
	} else {
		return ("");
	}
}
__END_DECLS

#if defined(_PERCGI_INTERNAL) || defined(_USE_PERCGI_VAR)
#define GetSV CGI_GetSV
#define SetSV CGI_SetSV
#define SetSV_S CGI_SetSV_S
#endif