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232 lines
6.6 KiB
232 lines
6.6 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Trivial application to read a variable
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/pbx.h"
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#include "asterisk/channel.h"
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#include "asterisk/app.h"
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#include "asterisk/module.h"
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#include "asterisk/indications.h"
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enum {
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OPT_SKIP = (1 << 0),
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OPT_INDICATION = (1 << 1),
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OPT_NOANSWER = (1 << 2),
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} read_option_flags;
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AST_APP_OPTIONS(read_app_options, {
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AST_APP_OPTION('s', OPT_SKIP),
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AST_APP_OPTION('i', OPT_INDICATION),
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AST_APP_OPTION('n', OPT_NOANSWER),
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});
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static char *app = "Read";
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static char *synopsis = "Read a variable";
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static char *descrip =
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" Read(variable[,filename[&filename2...]][,maxdigits][,option][,attempts][,timeout])\n\n"
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"Reads a #-terminated string of digits a certain number of times from the\n"
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"user in to the given variable.\n"
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" filename -- file(s) to play before reading digits or tone with option i\n"
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" maxdigits -- maximum acceptable number of digits. Stops reading after\n"
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" maxdigits have been entered (without requiring the user to\n"
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" press the '#' key).\n"
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" Defaults to 0 - no limit - wait for the user press the '#' key.\n"
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" Any value below 0 means the same. Max accepted value is 255.\n"
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" option -- options are 's' , 'i', 'n'\n"
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" 's' to return immediately if the line is not up,\n"
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" 'i' to play filename as an indication tone from your indications.conf\n"
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" 'n' to read digits even if the line is not up.\n"
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" attempts -- if greater than 1, that many attempts will be made in the \n"
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" event no data is entered.\n"
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" timeout -- The number of seconds to wait for a digit response. If greater\n"
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" than 0, that value will override the default timeout. Can be floating point.\n"
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"This application sets the following channel variable upon completion:\n"
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" READSTATUS - This is the status of the read operation.\n"
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" Possible values are:\n"
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" OK | ERROR | HANGUP | INTERRUPTED | SKIPPED | TIMEOUT\n";
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#define ast_next_data(instr,ptr,delim) if((ptr=strchr(instr,delim))) { *(ptr) = '\0' ; ptr++;}
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static int read_exec(struct ast_channel *chan, void *data)
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{
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int res = 0;
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char tmp[256] = "";
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int maxdigits = 255;
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int tries = 1, to = 0, x = 0;
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double tosec;
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char *argcopy = NULL;
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struct ind_tone_zone_sound *ts = NULL;
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struct ast_flags flags = {0};
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const char *status = "ERROR";
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AST_DECLARE_APP_ARGS(arglist,
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AST_APP_ARG(variable);
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AST_APP_ARG(filename);
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AST_APP_ARG(maxdigits);
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AST_APP_ARG(options);
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AST_APP_ARG(attempts);
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AST_APP_ARG(timeout);
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);
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pbx_builtin_setvar_helper(chan, "READSTATUS", status);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Read requires an argument (variable)\n");
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return 0;
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}
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argcopy = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(arglist, argcopy);
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if (!ast_strlen_zero(arglist.options)) {
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ast_app_parse_options(read_app_options, &flags, NULL, arglist.options);
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}
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if (!ast_strlen_zero(arglist.attempts)) {
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tries = atoi(arglist.attempts);
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if (tries <= 0)
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tries = 1;
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}
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if (!ast_strlen_zero(arglist.timeout)) {
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tosec = atof(arglist.timeout);
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if (tosec <= 0)
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to = 0;
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else
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to = tosec * 1000.0;
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}
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if (ast_strlen_zero(arglist.filename)) {
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arglist.filename = NULL;
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}
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if (!ast_strlen_zero(arglist.maxdigits)) {
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maxdigits = atoi(arglist.maxdigits);
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if ((maxdigits < 1) || (maxdigits > 255)) {
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maxdigits = 255;
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} else
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ast_verb(3, "Accepting a maximum of %d digits.\n", maxdigits);
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}
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if (ast_strlen_zero(arglist.variable)) {
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ast_log(LOG_WARNING, "Invalid! Usage: Read(variable[,filename][,maxdigits][,option][,attempts][,timeout])\n\n");
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return 0;
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}
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if (ast_test_flag(&flags, OPT_INDICATION)) {
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if (! ast_strlen_zero(arglist.filename)) {
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ts = ast_get_indication_tone(chan->zone, arglist.filename);
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}
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}
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if (chan->_state != AST_STATE_UP) {
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if (ast_test_flag(&flags, OPT_SKIP)) {
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/* At the user's option, skip if the line is not up */
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pbx_builtin_setvar_helper(chan, arglist.variable, "");
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pbx_builtin_setvar_helper(chan, "READSTATUS", "SKIPPED");
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return 0;
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} else if (!ast_test_flag(&flags, OPT_NOANSWER)) {
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/* Otherwise answer unless we're supposed to read while on-hook */
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res = ast_answer(chan);
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}
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}
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if (!res) {
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while (tries && !res) {
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ast_stopstream(chan);
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if (ts && ts->data[0]) {
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if (!to)
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to = chan->pbx ? chan->pbx->rtimeoutms : 6000;
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res = ast_playtones_start(chan, 0, ts->data, 0);
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for (x = 0; x < maxdigits; ) {
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res = ast_waitfordigit(chan, to);
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ast_playtones_stop(chan);
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if (res < 1) {
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if (res == 0)
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status = "TIMEOUT";
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tmp[x]='\0';
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break;
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}
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tmp[x++] = res;
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if (tmp[x-1] == '#') {
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tmp[x-1] = '\0';
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status = "OK";
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break;
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}
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if (x >= maxdigits) {
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status = "OK";
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}
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}
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} else {
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res = ast_app_getdata(chan, arglist.filename, tmp, maxdigits, to);
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if (res == 0)
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status = "OK";
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else if (res == 1)
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status = "TIMEOUT";
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else if (res == 2)
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status = "INTERRUPTED";
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}
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if (res > -1) {
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pbx_builtin_setvar_helper(chan, arglist.variable, tmp);
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if (!ast_strlen_zero(tmp)) {
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ast_verb(3, "User entered '%s'\n", tmp);
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tries = 0;
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} else {
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tries--;
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if (tries)
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ast_verb(3, "User entered nothing, %d chance%s left\n", tries, (tries != 1) ? "s" : "");
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else
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ast_verb(3, "User entered nothing.\n");
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}
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res = 0;
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} else {
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pbx_builtin_setvar_helper(chan, arglist.variable, tmp);
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ast_verb(3, "User disconnected\n");
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}
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}
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}
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if (ast_check_hangup(chan))
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status = "HANGUP";
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pbx_builtin_setvar_helper(chan, "READSTATUS", status);
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return 0;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application(app, read_exec, synopsis, descrip);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Read Variable Application");
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