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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2005, Russell Bryant <russelb@clemson.edu>
*
* func_db.c adapted from the old app_db.c, copyright by the following people
* Copyright (C) 2005, Mark Spencer <markster@digium.com>
* Copyright (C) 2003, Jefferson Noxon <jeff@debian.org>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Functions for interaction with the Asterisk database
*
* \author Russell Bryant <russelb@clemson.edu>
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <regex.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/options.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/astdb.h"
static char *function_db_read(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *parse;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(family);
AST_APP_ARG(key);
);
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)\n");
buf[0] = '\0';
return buf;
}
parse = ast_strdupa(data);
if (!parse) {
ast_log(LOG_ERROR, "Out of memory!\n");
buf[0] = '\0';
return buf;
}
AST_NONSTANDARD_APP_ARGS(args, parse, '/');
if (args.argc < 2) {
ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)\n");
buf[0] = '\0';
return buf;
}
if (ast_db_get(args.family, args.key, buf, len-1)) {
ast_log(LOG_DEBUG, "DB: %s/%s not found in database.\n", args.family, args.key);
} else
pbx_builtin_setvar_helper(chan, "DB_RESULT", buf);
return buf;
}
static void function_db_write(struct ast_channel *chan, char *cmd, char *data, const char *value)
{
char *parse;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(family);
AST_APP_ARG(key);
);
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)=<value>\n");
return;
}
parse = ast_strdupa(data);
if (!parse) {
ast_log(LOG_ERROR, "Out of memory!\n");
return;
}
AST_NONSTANDARD_APP_ARGS(args, parse, '/');
if (args.argc < 2) {
ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)=value\n");
return;
}
if (ast_db_put(args.family, args.key, (char*)value)) {
ast_log(LOG_WARNING, "DB: Error writing value to database.\n");
}
}
static struct ast_custom_function db_function = {
.name = "DB",
.synopsis = "Read or Write from/to the Asterisk database",
.syntax = "DB(<family>/<key>)",
.desc = "This function will read or write a value from/to the Asterisk database.\n"
"DB(...) will read a value from the database, while DB(...)=value\n"
"will write a value to the database. On a read, this function\n"
"returns the value from the datase, or NULL if it does not exist.\n"
"On a write, this function will always return NULL. Reading a database value\n"
"will also set the variable DB_RESULT.\n",
.read = function_db_read,
.write = function_db_write,
};
static char *function_db_exists(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *parse;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(family);
AST_APP_ARG(key);
);
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "DB_EXISTS requires an argument, DB(<family>/<key>)\n");
buf[0] = '\0';
return buf;
}
parse = ast_strdupa(data);
if (!parse) {
ast_log(LOG_ERROR, "Out of memory!\n");
buf[0] = '\0';
return buf;
}
AST_NONSTANDARD_APP_ARGS(args, parse, '/');
if (args.argc < 2) {
ast_log(LOG_WARNING, "DB_EXISTS requires an argument, DB(<family>/<key>)\n");
buf[0] = '\0';
return buf;
}
if (ast_db_get(args.family, args.key, buf, len-1))
ast_copy_string(buf, "0", len);
else {
pbx_builtin_setvar_helper(chan, "DB_RESULT", buf);
ast_copy_string(buf, "1", len);
}
return buf;
}
static struct ast_custom_function db_exists_function = {
.name = "DB_EXISTS",
.synopsis = "Check to see if a key exists in the Asterisk database",
.syntax = "DB_EXISTS(<family>/<key>)",
.desc = "This function will check to see if a key exists in the Asterisk\n"
"database. If it exists, the function will return \"1\". If not,\n"
"it will return \"0\". Checking for existence of a database key will\n"
"also set the variable DB_RESULT to the key's value if it exists.\n",
.read = function_db_exists,
};
static char *tdesc = "Database (astdb) related dialplan functions";
int unload_module(void)
{
int res = 0;
res |= ast_custom_function_unregister(&db_function);
res |= ast_custom_function_unregister(&db_exists_function);
return res;
}
int load_module(void)
{
int res = 0;
res |= ast_custom_function_register(&db_function);
res |= ast_custom_function_register(&db_exists_function);
return res;
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
return 0;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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