/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Application convenience functions, designed to give consistent
 * look and feel to asterisk apps.
 * 
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */

#ifndef _ASTERISK_APP_H
#define _ASTERISK_APP_H

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

/* IVR stuff */

/* Callback function for IVR, returns 0 on completion, -1 on hangup or digit if
   interrupted */
typedef int (*ast_ivr_callback)(struct ast_channel *chan, char *option, void *cbdata);

typedef enum {
	AST_ACTION_UPONE,		/* adata is unused */
	AST_ACTION_EXIT,		/* adata is the return value for ast_ivr_menu_run if channel was not hungup */
	AST_ACTION_CALLBACK,	/* adata is an ast_ivr_callback */
	AST_ACTION_PLAYBACK,	/* adata is file to play */
	AST_ACTION_BACKGROUND,	/* adata is file to play */
	AST_ACTION_PLAYLIST,	/* adata is list of files, separated by ; to play */
	AST_ACTION_MENU,		/* adata is a pointer to an ast_ivr_menu */
	AST_ACTION_REPEAT,		/* adata is max # of repeats, cast to a pointer */
	AST_ACTION_RESTART,		/* adata is like repeat, but resets repeats to 0 */
	AST_ACTION_TRANSFER,	/* adata is a string with exten[@context] */
	AST_ACTION_WAITOPTION,	/* adata is a timeout, or 0 for defaults */
	AST_ACTION_NOOP,		/* adata is unused */
	AST_ACTION_BACKLIST,	/* adata is list of files separated by ; allows interruption */
} ast_ivr_action;

struct ast_ivr_option {
	char *option;
	ast_ivr_action action;
	void *adata;	
};

/* 
    Special "options" are: 
   "s" - "start here (one time greeting)"
   "g" - "greeting/instructions"
   "t" - "timeout"
   "h" - "hangup"
   "i" - "invalid selection"

*/

struct ast_ivr_menu {
	char *title;		/* Title of menu */
	unsigned int flags;	/* Flags */
	struct ast_ivr_option *options;	/* All options */
};

#define AST_IVR_FLAG_AUTORESTART (1 << 0)

struct ast_option {
	unsigned int flag;
	int argoption;
};

extern int ast_parseoptions(const struct ast_option *options, struct ast_flags *flags, char **args, char *optstr);

#define AST_DECLARE_OPTIONS(holder,args...) \
	static struct ast_option holder[128] = args

#define AST_IVR_DECLARE_MENU(holder,title,flags,foo...) \
	static struct ast_ivr_option __options_##holder[] = foo;\
	static struct ast_ivr_menu holder = { title, flags, __options_##holder }
	

/*! Runs an IVR menu, returns 0 on successful completion, -1 on hangup, or -2 on user error in menu */
extern int ast_ivr_menu_run(struct ast_channel *c, struct ast_ivr_menu *menu, void *cbdata);

/*! Plays a stream and gets DTMF data from a channel */
/*!
 * \param c Which channel one is interacting with
 * \param prompt File to pass to ast_streamfile (the one that you wish to play)
 * \param s The location where the DTMF data will be stored
 * \param maxlen Max Length of the data
 * \param timeout Timeout length waiting for data(in milliseconds).  Set to 0 for standard timeout(six seconds), or -1 for no time out.
 *
 *  This function was designed for application programmers for situations where they need 
 *  to play a message and then get some DTMF data in response to the message.  If a digit 
 *  is pressed during playback, it will immediately break out of the message and continue
 *  execution of your code.
 */
extern int ast_app_getdata(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout);

/* Full version with audiofd and controlfd.  NOTE: returns '2' on ctrlfd available, not '1' like other full functions */
extern int ast_app_getdata_full(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout, int audiofd, int ctrlfd);

/*! Record voice (after playing prompt if specified), waiting for silence (in ms) up to a given timeout (in s) or '#' */
int ast_app_getvoice(struct ast_channel *c, char *dest, char *dstfmt, char *prompt, int silence, int maxsec);

void ast_install_vm_functions(int (*has_voicemail_func)(const char *mailbox, const char *folder),
			      int (*messagecount_func)(const char *mailbox, int *newmsgs, int *oldmsgs));
  
void ast_uninstall_vm_functions(void);

/*! Determine if a given mailbox has any voicemail */
int ast_app_has_voicemail(const char *mailbox, const char *folder);

/*! Determine number of new/old messages in a mailbox */
int ast_app_messagecount(const char *mailbox, int *newmsgs, int *oldmsgs);

/*! Safely spawn an external program while closingn file descriptors */
extern int ast_safe_system(const char *s);

/*! Send DTMF to chan (optionally entertain peer)   */
int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, char *digits, int between);

/*! Stream a filename (or file descriptor) as a generator. */
int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride);

/*! Stream a file with fast forward, pause, reverse. */
int ast_control_streamfile(struct ast_channel *chan, const char *file, const char *fwd, const char *rev, const char *stop, const char *pause, int skipms);

/*! Play a stream and wait for a digit, returning the digit that was pressed */
int ast_play_and_wait(struct ast_channel *chan, const char *fn);

/*! Record a file for a max amount of time (in seconds), in a given list of formats separated by '|', outputting the duration of the recording, and with a maximum */
/*   permitted silence time in milliseconds of 'maxsilence' under 'silencethreshold' or use '-1' for either or both parameters for defaults. 
     calls ast_unlock_path() on 'path' if passed */
int ast_play_and_record(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime_sec, const char *fmt, int *duration, int silencethreshold, int maxsilence_ms, const char *path);

/*! Record a message and prepend the message to the given record file after playing the optional playfile (or a beep), storing the duration in 'duration' and with a maximum */
/*   permitted silence time in milliseconds of 'maxsilence' under 'silencethreshold' or use '-1' for either or both parameters for defaults. */
int ast_play_and_prepend(struct ast_channel *chan, char *playfile, char *recordfile, int maxtime_sec, char *fmt, int *duration, int beep, int silencethreshold, int maxsilence_ms);

/* Lock a path */
int ast_lock_path(const char *path);

/* Unlock a path */
int ast_unlock_path(const char *path);

/*Read a file into asterisk*/
char *ast_read_textfile(const char *file);

#define GROUP_CATEGORY_PREFIX "GROUP"

/*! Split a group string into group and category, returning a default category if none is provided. */
int ast_app_group_split_group(char *data, char *group, int group_max, char *category, int category_max);

/*! Set the group for a channel, splitting the provided data into group and category, if specified. */
int ast_app_group_set_channel(struct ast_channel *chan, char *data);

/*! Get the current channel count of the specified group and category. */
int ast_app_group_get_count(char *group, char *category);

/*! Get the current channel count of all groups that match the specified pattern and category. */
int ast_app_group_match_get_count(char *groupmatch, char *category);

/*! Create an argc argv type structure for app args */
int ast_separate_app_args(char *buf, char delim, char **array, int arraylen);

/*! Present a dialtone and collect a certain length extension.  Returns 1 on valid extension entered, -1 on hangup, or 0 on invalid extension. Note that if 'collect' holds digits already, new digits will be appended, so be sure it's initialized properly */
int ast_app_dtget(struct ast_channel *chan, const char *context, char *collect, size_t size, int maxlen, int timeout);

/*! Allow to record message and have a review option */
int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path);

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif