#!/usr/bin/perl
#
# agi-LCR-Route.agi version 2.2.0
#
# This script looks up the NPANXX in the lcr table and sets 
# the LCRTRUNK dialplan variable to the carrier string 
# with the cheapest rate. If no carrier is found for this NPANXX
# the variable is unchanged so you should set it with the default
# previously.
#
# [globals]
# LCRTRUNK=SIP/provider1    ; default LCR trunk
#
# [default]
# ;outbound VICIDIAL calls:
# exten => _91NXXNXXXXXX,1,AGI(agi://127.0.0.1:4577/call_log)
# exten => _91NXXNXXXXXX,n,AGI(agi-LCR-Route.agi,${EXTEN:2:6})
# exten => _91NXXNXXXXXX,n,Dial(${LCRTRUNK}/${EXTEN:2},,To)
# exten => _91NXXNXXXXXX,n,Hangup
#
# Here is the SQL to create the lcr table:
#
# create table if not exists lcr (
#        npanxx mediumint not null,
#        rate varchar(10) not null,
#        carrier_string varchar(20) not null
# );
# alter table lcr add unique index (npanxx, rate, carrier_string);
#
# A typical npanxx from this table should look like:
#
# mysql> select npanxx,rate,carrier_string from lcr where npanxx='734223';
# +--------+--------+----------------+
# | npanxx | rate   | carrier_string |
# +--------+--------+----------------+
# | 734223 | 0.0064 | SIP/provider1  |
# | 734223 | 0.0076 | SIP/provider2  |
# +--------+--------+----------------+
#
# Unfortunately these rate sheets are not in a standard format.
# You will have to write a custom loading script to populate this table.
# An exampe loading script is provided in the extras directory of the
# astguiclient source code called lcr_loader_example.pl
#
#
# Copyright (C) 2009  Michael Cargile <mikec@vicidial.com>    LICENSE: AGPLv2
#
# changes:
# 90717-1554 - First Build
# 91129-2209 - formatting fixes
#

sub agi_output
	{
	if ($AGILOG >=2)
		{
		### open the log file for writing ###
		open(Lout, ">>$AGILOGfile")
						|| die "Can't open $AGILOGfile: $!\n";
		print Lout "$now_date|$script|$agi_string\n";
		close(Lout);
		}
		### send to STDERR writing ###
	if ( ($AGILOG == '1') || ($AGILOG == '3') )
			{print STDERR "$now_date|$script|$agi_string\n";}
	$agi_string='';
	}

$script = 'agi-LCR-Route.agi';
$AGILOG = '0';


($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time);
$year = ($year + 1900);
$mon++;
if ($mon < 10) {$mon = "0$mon";}
if ($mday < 10) {$mday = "0$mday";}
if ($hour < 10) {$hour = "0$hour";}
if ($min < 10) {$min = "0$min";}
if ($sec < 10) {$sec = "0$sec";}

# default path to astguiclient configuration file:
$PATHconf = '/etc/astguiclient.conf';

open(conf, "$PATHconf") || die "can't open $PATHconf: $!\n";
@conf = <conf>;
close(conf);
$i=0;
foreach(@conf)
	{
	$line = $conf[$i];
	$line =~ s/ |>|\n|\r|\t|\#.*|;.*//gi;
	if ( ($line =~ /^PATHhome/) && ($CLIhome < 1) )
		{$PATHhome = $line;   $PATHhome =~ s/.*=//gi;}
	if ( ($line =~ /^PATHlogs/) && ($CLIlogs < 1) )
		{$PATHlogs = $line;   $PATHlogs =~ s/.*=//gi;}
	if ( ($line =~ /^PATHagi/) && ($CLIagi < 1) )
		{$PATHagi = $line;   $PATHagi =~ s/.*=//gi;}
	if ( ($line =~ /^PATHweb/) && ($CLIweb < 1) )
		{$PATHweb = $line;   $PATHweb =~ s/.*=//gi;}
	if ( ($line =~ /^PATHsounds/) && ($CLIsounds < 1) )
		{$PATHsounds = $line;   $PATHsounds =~ s/.*=//gi;}
	if ( ($line =~ /^PATHmonitor/) && ($CLImonitor < 1) )
		{$PATHmonitor = $line;   $PATHmonitor =~ s/.*=//gi;}
	if ( ($line =~ /^VARserver_ip/) && ($CLIserver_ip < 1) )
		{$VARserver_ip = $line;   $VARserver_ip =~ s/.*=//gi;}
	if ( ($line =~ /^VARDB_server/) && ($CLIDB_server < 1) )
		{$VARDB_server = $line;   $VARDB_server =~ s/.*=//gi;}
	if ( ($line =~ /^VARDB_database/) && ($CLIDB_database < 1) )
		{$VARDB_database = $line;   $VARDB_database =~ s/.*=//gi;}
	if ( ($line =~ /^VARDB_user/) && ($CLIDB_user < 1) )
		{$VARDB_user = $line;   $VARDB_user =~ s/.*=//gi;}
	if ( ($line =~ /^VARDB_pass/) && ($CLIDB_pass < 1) )
		{$VARDB_pass = $line;   $VARDB_pass =~ s/.*=//gi;}
	if ( ($line =~ /^VARDB_port/) && ($CLIDB_port < 1) )
		{$VARDB_port = $line;   $VARDB_port =~ s/.*=//gi;}
	$i++;
	}

if (!$VARDB_port) {$VARDB_port='3306';}
if (!$AGILOGfile) {$AGILOGfile = "$PATHlogs/agiout.$year-$mon-$mday";}

use DBI;
use Asterisk::AGI;
$AGI = new Asterisk::AGI;

$dbhA = DBI->connect("DBI:mysql:$VARDB_database:$VARDB_server:$VARDB_port", "$VARDB_user", "$VARDB_pass")
    or die "Couldn't connect to database: " . DBI->errstr;

### Grab Server values from the database
$stmtA = "SELECT agi_output FROM servers where server_ip = '$VARserver_ip';";
$sthA = $dbhA->prepare($stmtA) or die "preparing: ",$dbhA->errstr;
$sthA->execute or die "executing: $stmtA ", $dbhA->errstr;
$sthArows=$sthA->rows;
if ($sthArows > 0)
	{
	@aryA = $sthA->fetchrow_array;
	$DBagi_output = "$aryA[0]";
	if ($DBagi_output =~ /STDERR/)  {$AGILOG = '1';}
	if ($DBagi_output =~ /FILE/)    {$AGILOG = '2';}
	if ($DBagi_output =~ /BOTH/)    {$AGILOG = '3';}
	}
$sthA->finish();


### begin parsing run-time options ###
if (length($ARGV[0])>1)
	{
	if ($AGILOG) {$agi_string = "Perl Environment Dump:";   &agi_output;}
	$i=0;
	while ($#ARGV >= $i)
		{
		$args = "$args $ARGV[$i]";
		if ($AGILOG) {$agi_string = "$i|$ARGV[$i]";   &agi_output;}
		$i++;
		}
	
	### list of command-line array arguments:
	@ARGV_vars = split(/-----/, $ARGV[0]);

	$npanxx = $ARGV_vars[0];
	if ($AGILOG) {$agi_string = "Searching for NPANXX = $npanxx";   &agi_output;}
	}

# get the cheapest carrier
$stmtA = "SELECT carrier_string, rate FROM lcr WHERE npanxx='$npanxx' ORDER BY rate ASC";
$sthA = $dbhA->prepare($stmtA) or die "preparing: ",$dbhA->errstr;
$sthA->execute or die "executing: $stmtA ", $dbhA->errstr;
$sthArows=$sthA->rows;
if ( $sthArows > 0 ) 
	{ 
	$rec_count=0;
	@aryA = $sthA->fetchrow_array;
	$carrier_string = "$aryA[0]";
	$sthA->finish();

	if ($AGILOG) {$agi_string = "Setting LCRTRUNK to $carrier_string";   &agi_output;}

	$AGI->set_variable( "LCRTRUNK",$carrier_string );
	}
else 
	{
	if ($AGILOG) {$agi_string = "No carrier found for NPANXX = $npanxx. Leaving the LCRTRUNK variable as the default.";   &agi_output;}
	}