app.c

/* Channel group core functions */

int ast_app_group_split_group(const char *data, char *group, int group_max, char *category, int category_max)
{
	int res=0;
	char tmp[256];
	char *grp=NULL, *cat=NULL;

	if (!ast_strlen_zero(data)) {
		ast_copy_string(tmp, data, sizeof(tmp));
		grp = tmp;
		cat = strchr(tmp, '@');
		if (cat) {
			*cat = '\0';
			cat++;
		}
	}

	if (!ast_strlen_zero(grp))
		ast_copy_string(group, grp, group_max);
	else
		res = -1;

	if (cat)
		snprintf(category, category_max, "%s_%s", GROUP_CATEGORY_PREFIX, cat);
	else
		ast_copy_string(category, GROUP_CATEGORY_PREFIX, category_max);

	return res;
}

int ast_app_group_set_channel(struct ast_channel *chan, const char *data)
{
	int res=0;
	char group[80] = "";
	char category[80] = "";

	if (!ast_app_group_split_group(data, group, sizeof(group), category, sizeof(category))) {
		pbx_builtin_setvar_helper(chan, category, group);
	} else
		res = -1;

	return res;
}

int ast_app_group_get_count(const char *group, const char *category)
{
	struct ast_channel *chan;
	int count = 0;
	const char *test;
	char cat[80];
	const char *s;

	if (ast_strlen_zero(group))
		return 0;

 	s = S_OR(category, GROUP_CATEGORY_PREFIX);
	ast_copy_string(cat, s, sizeof(cat));

	chan = NULL;
	while ((chan = ast_channel_walk_locked(chan)) != NULL) {
 		test = pbx_builtin_getvar_helper(chan, cat);
		if (test && !strcasecmp(test, group))
 			count++;
		ast_mutex_unlock(&chan->lock);
	}

	return count;
}

int ast_app_group_match_get_count(const char *groupmatch, const char *category)
{
	regex_t regexbuf;
	struct ast_channel *chan;
	int count = 0;
	const char *test;
	char cat[80];
	const char *s;

	if (ast_strlen_zero(groupmatch))
		return 0;

	/* if regex compilation fails, return zero matches */
	if (regcomp(&regexbuf, groupmatch, REG_EXTENDED | REG_NOSUB))
		return 0;

	s = S_OR(category, GROUP_CATEGORY_PREFIX);
	ast_copy_string(cat, s, sizeof(cat));

	chan = NULL;
	while ((chan = ast_channel_walk_locked(chan)) != NULL) {
		test = pbx_builtin_getvar_helper(chan, cat);
		if (test && !regexec(&regexbuf, test, 0, NULL, 0))
			count++;
		ast_mutex_unlock(&chan->lock);
	}

	regfree(&regexbuf);

	return count;
}

unsigned int ast_app_separate_args(char *buf, char delim, char **array, int arraylen)
{
	int argc;
	char *scan;
	int paren = 0, quote = 0;

	if (!buf || !array || !arraylen)
		return 0;

	memset(array, 0, arraylen * sizeof(*array));

	scan = buf;

	for (argc = 0; *scan && (argc < arraylen - 1); argc++) {
		array[argc] = scan;
		for (; *scan; scan++) {
			if (*scan == '(')
				paren++;
			else if (*scan == ')') {
				if (paren)
					paren--;
			} else if (*scan == '"') {
				quote = quote ? 0 : 1;
				/* Remove quote character from argument */
				memmove(scan, scan + 1, strlen(scan));
				scan--;
			} else if (*scan == '\\') {
				/* Literal character, don't parse */
				memmove(scan, scan + 1, strlen(scan));
			} else if ((*scan == delim) && !paren && !quote) {
				*scan++ = '\0';
				break;
			}
		}
	}

	if (*scan)
		array[argc++] = scan;

	return argc;
}

enum AST_LOCK_RESULT ast_lock_path(const char *path)
{
	char *s;
	char *fs;
	int res;
	int fd;
	int lp = strlen(path);
	time_t start;

	if (!(s = alloca(lp + 10)) || !(fs = alloca(lp + 20))) {
		ast_log(LOG_WARNING, "Out of memory!\n");
		return AST_LOCK_FAILURE;
	}

	snprintf(fs, strlen(path) + 19, "%s/.lock-%08lx", path, ast_random());
	fd = open(fs, O_WRONLY | O_CREAT | O_EXCL, 0600);
	if (fd < 0) {
		fprintf(stderr, "Unable to create lock file '%s': %s\n", path, strerror(errno));
		return AST_LOCK_PATH_NOT_FOUND;
	}
	close(fd);

	snprintf(s, strlen(path) + 9, "%s/.lock", path);
	time(&start);
	while (((res = link(fs, s)) < 0) && (errno == EEXIST) && (time(NULL) - start < 5))
		usleep(1);
	if (res) {
		ast_log(LOG_WARNING, "Failed to lock path '%s': %s\n", path, strerror(errno));
		return AST_LOCK_TIMEOUT;
	} else {
		unlink(fs);
		ast_log(LOG_DEBUG, "Locked path '%s'\n", path);
		return AST_LOCK_SUCCESS;
	}
}

int ast_unlock_path(const char *path)
{
	char *s;
	if (!(s = alloca(strlen(path) + 10)))
		return -1;
	snprintf(s, strlen(path) + 9, "%s/%s", path, ".lock");
	ast_log(LOG_DEBUG, "Unlocked path '%s'\n", path);
	return unlink(s);
}

int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path) 
{
	int silencethreshold = 128; 
	int maxsilence=0;
	int res = 0;
	int cmd = 0;
	int max_attempts = 3;
	int attempts = 0;
	int recorded = 0;
	int message_exists = 0;
	/* Note that urgent and private are for flagging messages as such in the future */

	/* barf if no pointer passed to store duration in */
	if (duration == NULL) {
		ast_log(LOG_WARNING, "Error ast_record_review called without duration pointer\n");
		return -1;
	}

	cmd = '3';	 /* Want to start by recording */

	while ((cmd >= 0) && (cmd != 't')) {
		switch (cmd) {
		case '1':
			if (!message_exists) {
				/* In this case, 1 is to record a message */
				cmd = '3';
				break;
			} else {
				ast_streamfile(chan, "vm-msgsaved", chan->language);
				ast_waitstream(chan, "");
				cmd = 't';
				return res;
			}
		case '2':
			/* Review */
			ast_verbose(VERBOSE_PREFIX_3 "Reviewing the recording\n");
			ast_streamfile(chan, recordfile, chan->language);
			cmd = ast_waitstream(chan, AST_DIGIT_ANY);
			break;
		case '3':
			message_exists = 0;
			/* Record */
			if (recorded == 1)
				ast_verbose(VERBOSE_PREFIX_3 "Re-recording\n");
			else	
				ast_verbose(VERBOSE_PREFIX_3 "Recording\n");
			recorded = 1;
			cmd = ast_play_and_record(chan, playfile, recordfile, maxtime, fmt, duration, silencethreshold, maxsilence, path);
			if (cmd == -1) {
			/* User has hung up, no options to give */
				return cmd;
			}
			if (cmd == '0') {
				break;
			} else if (cmd == '*') {
				break;
			} 
			else {
				/* If all is well, a message exists */
				message_exists = 1;
				cmd = 0;
			}
			break;
		case '4':
		case '5':
		case '6':
		case '7':
		case '8':
		case '9':
		case '*':
		case '#':
			cmd = ast_play_and_wait(chan, "vm-sorry");
			break;
		default:
			if (message_exists) {
				cmd = ast_play_and_wait(chan, "vm-review");
			}
			else {
				cmd = ast_play_and_wait(chan, "vm-torerecord");
				if (!cmd)
					cmd = ast_waitfordigit(chan, 600);
			}
			
			if (!cmd)
				cmd = ast_waitfordigit(chan, 6000);
			if (!cmd) {
				attempts++;
			}
			if (attempts > max_attempts) {
				cmd = 't';
			}
		}
	}
	if (cmd == 't')
		cmd = 0;
	return cmd;
}

#define RES_UPONE (1 << 16)
#define RES_EXIT  (1 << 17)
#define RES_REPEAT (1 << 18)
#define RES_RESTART ((1 << 19) | RES_REPEAT)

static int ast_ivr_menu_run_internal(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata);
static int ivr_dispatch(struct ast_channel *chan, struct ast_ivr_option *option, char *exten, void *cbdata)
{
	int res;
	int (*ivr_func)(struct ast_channel *, void *);
	char *c;
	char *n;
	
	switch(option->action) {
	case AST_ACTION_UPONE:
		return RES_UPONE;
	case AST_ACTION_EXIT:
		return RES_EXIT | (((unsigned long)(option->adata)) & 0xffff);
	case AST_ACTION_REPEAT:
		return RES_REPEAT | (((unsigned long)(option->adata)) & 0xffff);
	case AST_ACTION_RESTART:
		return RES_RESTART ;
	case AST_ACTION_NOOP:
		return 0;
	case AST_ACTION_BACKGROUND:
		res = ast_streamfile(chan, (char *)option->adata, chan->language);
		if (!res) {
			res = ast_waitstream(chan, AST_DIGIT_ANY);
		} else {
			ast_log(LOG_NOTICE, "Unable to find file '%s'!\n", (char *)option->adata);
			res = 0;
		}
		return res;
	case AST_ACTION_PLAYBACK:
		res = ast_streamfile(chan, (char *)option->adata, chan->language);
		if (!res) {
			res = ast_waitstream(chan, "");
		} else {
			ast_log(LOG_NOTICE, "Unable to find file '%s'!\n", (char *)option->adata);
			res = 0;
		}
		return res;
	case AST_ACTION_MENU:
		res = ast_ivr_menu_run_internal(chan, (struct ast_ivr_menu *)option->adata, cbdata);
		/* Do not pass entry errors back up, treaat ast though ti was an "UPONE" */
		if (res == -2)
			res = 0;
		return res;
	case AST_ACTION_WAITOPTION:
		res = ast_waitfordigit(chan, 1000 * (chan->pbx ? chan->pbx->rtimeout : 10));
		if (!res)
			return 't';
		return res;
	case AST_ACTION_CALLBACK:
		ivr_func = option->adata;
		res = ivr_func(chan, cbdata);
		return res;
	case AST_ACTION_TRANSFER:
		res = ast_parseable_goto(chan, option->adata);
		return 0;
	case AST_ACTION_PLAYLIST:
	case AST_ACTION_BACKLIST:
		res = 0;
		c = ast_strdupa(option->adata);
		if (c) {
			while((n = strsep(&c, ";")))
				if ((res = ast_streamfile(chan, n, chan->language)) || (res = ast_waitstream(chan, (option->action == AST_ACTION_BACKLIST) ? AST_DIGIT_ANY : "")))
					break;
			ast_stopstream(chan);
		}
		return res;
	default:
		ast_log(LOG_NOTICE, "Unknown dispatch function %d, ignoring!\n", option->action);
		return 0;
	};
	return -1;
}

static int option_exists(struct ast_ivr_menu *menu, char *option)
{
	int x;
	for (x=0;menu->options[x].option;x++)
		if (!strcasecmp(menu->options[x].option, option))
			return x;
	return -1;
}

static int option_matchmore(struct ast_ivr_menu *menu, char *option)
{
	int x;
	for (x=0;menu->options[x].option;x++)
		if ((!strncasecmp(menu->options[x].option, option, strlen(option))) && 
				(menu->options[x].option[strlen(option)]))
			return x;
	return -1;
}

static int read_newoption(struct ast_channel *chan, struct ast_ivr_menu *menu, char *exten, int maxexten)
{
	int res=0;
	int ms;
	while(option_matchmore(menu, exten)) {
		ms = chan->pbx ? chan->pbx->dtimeout : 5000;
		if (strlen(exten) >= maxexten - 1) 
			break;
		res = ast_waitfordigit(chan, ms);
		if (res < 1)
			break;
		exten[strlen(exten) + 1] = '\0';
		exten[strlen(exten)] = res;
	}
	return res > 0 ? 0 : res;
}

static int ast_ivr_menu_run_internal(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata)
{
	/* Execute an IVR menu structure */
	int res=0;
	int pos = 0;
	int retries = 0;
	char exten[AST_MAX_EXTENSION] = "s";
	if (option_exists(menu, "s") < 0) {
		strcpy(exten, "g");
		if (option_exists(menu, "g") < 0) {
			ast_log(LOG_WARNING, "No 's' nor 'g' extension in menu '%s'!\n", menu->title);
			return -1;
		}
	}
	while(!res) {
		while(menu->options[pos].option) {
			if (!strcasecmp(menu->options[pos].option, exten)) {
				res = ivr_dispatch(chan, menu->options + pos, exten, cbdata);
				ast_log(LOG_DEBUG, "IVR Dispatch of '%s' (pos %d) yields %d\n", exten, pos, res);
				if (res < 0)
					break;
				else if (res & RES_UPONE)
					return 0;
				else if (res & RES_EXIT)
					return res;
				else if (res & RES_REPEAT) {
					int maxretries = res & 0xffff;
					if ((res & RES_RESTART) == RES_RESTART) {
						retries = 0;
					} else
						retries++;
					if (!maxretries)
						maxretries = 3;
					if ((maxretries > 0) && (retries >= maxretries)) {
						ast_log(LOG_DEBUG, "Max retries %d exceeded\n", maxretries);
						return -2;
					} else {
						if (option_exists(menu, "g") > -1) 
							strcpy(exten, "g");
						else if (option_exists(menu, "s") > -1)
							strcpy(exten, "s");
					}
					pos=0;
					continue;
				} else if (res && strchr(AST_DIGIT_ANY, res)) {
					ast_log(LOG_DEBUG, "Got start of extension, %c\n", res);
					exten[1] = '\0';
					exten[0] = res;
					if ((res = read_newoption(chan, menu, exten, sizeof(exten))))
						break;
					if (option_exists(menu, exten) < 0) {
						if (option_exists(menu, "i")) {
							ast_log(LOG_DEBUG, "Invalid extension entered, going to 'i'!\n");
							strcpy(exten, "i");
							pos = 0;
							continue;
						} else {
							ast_log(LOG_DEBUG, "Aborting on invalid entry, with no 'i' option!\n");
							res = -2;
							break;
						}
					} else {
						ast_log(LOG_DEBUG, "New existing extension: %s\n", exten);
						pos = 0;
						continue;
					}
				}
			}
			pos++;
		}
		ast_log(LOG_DEBUG, "Stopping option '%s', res is %d\n", exten, res);
		pos = 0;
		if (!strcasecmp(exten, "s"))
			strcpy(exten, "g");
		else
			break;
	}
	return res;
}

int ast_ivr_menu_run(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata)
{
	int res;
	res = ast_ivr_menu_run_internal(chan, menu, cbdata);
	/* Hide internal coding */
	if (res > 0)
		res = 0;
	return res;
}
	
char *ast_read_textfile(const char *filename)
{
	int fd;
	char *output=NULL;
	struct stat filesize;
	int count=0;
	int res;
	if(stat(filename,&filesize)== -1){
		ast_log(LOG_WARNING,"Error can't stat %s\n", filename);
		return NULL;
	}
	count=filesize.st_size + 1;
	fd = open(filename, O_RDONLY);
	if (fd < 0) {
		ast_log(LOG_WARNING, "Cannot open file '%s' for reading: %s\n", filename, strerror(errno));
		return NULL;
	}
	if ((output = ast_malloc(count))) {
		res = read(fd, output, count - 1);
		if (res == count - 1) {
			output[res] = '\0';
		} else {
			ast_log(LOG_WARNING, "Short read of %s (%d of %d): %s\n", filename, res, count -  1, strerror(errno));
			free(output);
			output = NULL;
		}
	}
	close(fd);
	return output;
}

int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr)
{
	char *s;
	int curarg;
	unsigned int argloc;
	char *arg;
	int res = 0;

	ast_clear_flag(flags, AST_FLAGS_ALL);

	if (!optstr)
		return 0;

	s = optstr;
	while (*s) {
		curarg = *s++ & 0x7f;	/* the array (in app.h) has 128 entries */
		ast_set_flag(flags, options[curarg].flag);
		argloc = options[curarg].arg_index;
		if (*s == '(') {
			/* Has argument */
			arg = ++s;
			s = strchr(s, ')');
			if (*s) {
				if (argloc)
					args[argloc - 1] = arg;
				*s++ = '\0';
			} else {
				ast_log(LOG_WARNING, "Missing closing parenthesis for argument '%c' in string '%s'\n", curarg, arg);
				res = -1;
			}
		} else if (argloc) {
			args[argloc - 1] = NULL;
		}
	}

	return res;
}