#! /bin/sh
#
# Written by Oron Peled <oron@actcom.co.il>
# Copyright (C) 2009, Xorcom
#
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#

#
# This is an experimental script to activate an Astribank TwinStar
# during failover.
#
# The script assume that there is an /etc/dahdi/xpp_order file
# specifying the Astribanks' labels according to the required
# registration order.
#
# This file can be easily generated by running:
#    dahdi_genconf xpporder
# after the system is configured and working.
#

me=`basename $0`
dir=`dirname $0`
LOGGER="logger -i -t '$me'"

# Always redirect stderr somewhere, otherwise the shell script will die
# when it tries to do I/O related stuff on closed file descriptor.
# Our default is to throw it down the bit-bucket.
#exec 2> /dev/console
## If you wish to trace this script:
#exec 2> "/tmp/${me}_$XBUS_NAME" 1>&2

# Our directory in the beginning, so we can use local lab setup
PATH="$dir:/usr/sbin:/sbin:/usr/bin:/bin"

set -e

# For lab testing
liveconf="$dir/liveconf/dahdi"

if [ -d "$liveconf" ]; then
	dahdi_conf="$liveconf"
else
	dahdi_conf="/etc/dahdi"
fi

export XPPORDER_CONF="$dahdi_conf/xpp_order"
if [ ! -r "$XPPORDER_CONF" ]; then
	echo "Skip($ACTION): No '$XPPORDER_CONF'" | $LOGGER
	exit 0
fi
SYSTEMCONF="$dahdi_conf/system.conf"

TWS_DIR="/var/tmp"
TWS_PREFIX="$TWS_DIR/twinstar-"
LABELFILE="/sys/$DEVPATH/label"
export XBUS_SORT='SORT_LABEL'

echo "starting($ACTION): setup from $XPPORDER_CONF" | $LOGGER
STAMP="${TWS_PREFIX}${XBUS_NAME}"
TWS_TOTAL=`sed -e 's/#.*//' -e '/^[ 	]*$/d' -e 'y/\t/ /' "$XPPORDER_CONF" | wc -l`

case "$ACTION" in
online)
	if [ ! -f "$LABELFILE" ]; then
		echo "Missing labelfile '$LABELFILE'" | $LOGGER
		exit 1
	fi
	LABEL=`cat $LABELFILE`
	TWS_LINE=`awk "/^$LABEL/" $XPPORDER_CONF`
	if [ "$TWS_LINE" = "" ]; then
		echo "online($XBUS_NAME): '$LABEL' is not in '$XPPORDER_CONF'" | $LOGGER
		exit 1
	fi
	echo "$LABEL" > "$STAMP"
	HOW_MANY=`ls ${TWS_PREFIX}* | wc -l`
	echo "online($XBUS_NAME): $LABEL (${HOW_MANY}/${TWS_TOTAL})" | $LOGGER
	twinstar enable-wd
	if [ "$HOW_MANY" -eq "$TWS_TOTAL" ]; then
		echo "online: GOT ALL $TWS_TOTAL" | $LOGGER
		dahdi_registration on
		dahdi_registration 2>&1 | tr '\t' ' ' | $LOGGER
		echo "Using '$SYSTEMCONF'" 2>&1 | $LOGGER
		dahdi_cfg -v -c "$SYSTEMCONF" 2>&1 | $LOGGER
		sleep 1	# Just for visual effect
		asterisk -rx 'module load chan_dahdi.so' 2>&1 | $LOGGER
		xpp_blink bzzt xpd "$XBUS_NUM"
		ports=`twinstar ports`
		if [ "$ports" = 0 ]; then
			play /usr/share/zaptel/primary-pbx-is-ready.wav || :
		elif [ "$ports" = 1 ]; then
			play /usr/share/zaptel/backup-pbx-is-ready.wav || :
		fi
		echo "online: READY" | $LOGGER
	fi
	;;
offline)
	LABEL=`cat $STAMP`
	TWS_LINE=`awk "/^$LABEL/" $XPPORDER_CONF`
	rm -f "$STAMP"
	if [ "$TWS_LINE" = "" ]; then
		echo "offline($XBUS_NAME): $LABEL is not in $XPPORDER_CONF" | $LOGGER
		exit 1
	fi
	echo "offline($XBUS_NAME): $LABEL" | $LOGGER
	twinstar disable-wd
	# If we want to disconnect everybody
	twinstar jump
	asterisk -rx 'module unload chan_dahdi.so'
	;;
*)
	echo "$0: Unknown ACTION='$ACTION'" | $LOGGER
	echo "$0: ARGS='$*'" | $LOGGER
	echo "$0: ENV:" | $LOGGER
	env | $LOGGER
	exit 1
esac