/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Trivial application to record a sound file
 * 
 * Copyright (C) 2001, Linux Support Services, Inc.
 *
 * Matthew Fredrickson <creslin@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */
 
#include <asterisk/lock.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/pbx.h>
#include <asterisk/module.h>
#include <asterisk/translate.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>

static char *tdesc = "Trivial Record Application";

static char *app = "Record";

static char *synopsis = "Record to a file";

static char *descrip = 
"  Record(filename:extension): Records from the  channel into a given\n"
"filename. If the file exists it will be overwritten. The 'extension'\n"
"is the extension of the file type  to  be  recorded (wav, gsm, etc).\n"
"Returns -1 when the user hangs up.\n";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static int record_exec(struct ast_channel *chan, void *data)
{
	int res = 0;
	int count = 0;
	int percentflag = 0;
	char fil[256];
	char tmp[256];
	char ext[10];
	char * vdata;  /* Used so I don't have to typecast every use of *data */
	int i = 0;
	int j = 0;
	
	struct ast_filestream *s = '\0';
	struct localuser *u;
	struct ast_frame *f = NULL;
	
	vdata = data; /* explained above */
	

	/* The next few lines of code parse out the filename and header from the input string */
	if (!vdata) { /* no data implies no filename or anything is present */
		ast_log(LOG_WARNING, "Record requires an argument (filename)\n");
		return -1;
	}
	
	for (; vdata[i] && (vdata[i] != ':') ; i++ ) {
		if ((vdata[i] == '%') && (vdata[i+1] == 'd')) {
			percentflag = 1;                      /* the wildcard is used */
		}
		
		if (i == strlen(vdata) ) {
			ast_log(LOG_WARNING, "No extension found\n");
			return -1;
		}
		fil[i] = vdata[i];
	}
	fil[i++] = '\0';

	for (; j < 10 && i < strlen(data); i++, j++)
		ext[j] = vdata[i];
	ext[j] = '\0';
	/* done parsing */
	
	
	/* these are to allow the use of the %d in the config file for a wild card of sort to
	  create a new file with the inputed name scheme */
	if (percentflag) {
		do {
			snprintf(tmp, 256, fil, count);
			count++;
		} while ( ast_fileexists(tmp, ext, chan->language) != -1 );
	} else
		strncpy(tmp, fil, 256-1);
	/* end of routine mentioned */

	LOCAL_USER_ADD(u);

	if (chan->_state != AST_STATE_UP) {
		res = ast_answer(chan); /* Shouldn't need this, but checking to see if channel is already answered
					 * Theoretically asterisk should already have answered before running the app */
	}
	
	if (!res) {
		/* Some code to play a nice little beep to signify the start of the record operation */
		res = ast_streamfile(chan, "beep", chan->language);
		if (!res) {
			res = ast_waitstream(chan, "");
		} else {
			ast_log(LOG_WARNING, "ast_streamfile failed on %s\n", chan->name);
		}
		ast_stopstream(chan);
		/* The end of beep code.  Now the recording starts */
		s = ast_writefile( tmp, ext, NULL, O_CREAT|O_TRUNC|O_WRONLY , 0, 0644);
	
		if (s) {
			while (ast_waitfor(chan, -1) > -1) {
				f = ast_read(chan);
				if (!f) {
					res = -1;
					break;
				}
				if (f->frametype == AST_FRAME_VOICE) {
					res = ast_writestream(s, f);
					
					if (res) {
						ast_log(LOG_WARNING, "Problem writing frame\n");
						break;
					}
				}
				if ((f->frametype == AST_FRAME_DTMF) &&
					(f->subclass == '#')) {
					ast_frfree(f);
					break;
				}
				ast_frfree(f);
			}
			if (!f) {
					ast_log(LOG_DEBUG, "Got hangup\n");
					res = -1;
			}
			ast_closestream(s);
		} else			
			ast_log(LOG_WARNING, "Could not create file %s\n", fil);
	} else
		ast_log(LOG_WARNING, "Could not answer channel '%s'\n", chan->name);

	LOCAL_USER_REMOVE(u);
	return res;
}

int unload_module(void)
{
	STANDARD_HANGUP_LOCALUSERS;
	return ast_unregister_application(app);
}

int load_module(void)
{
	return ast_register_application(app, record_exec, synopsis, descrip);
}

char *description(void)
{
	return tdesc;
}

int usecount(void)
{
	int res;
	STANDARD_USECOUNT(res);
	return res;
}

char *key()
{
	return ASTERISK_GPL_KEY;
}