#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Mumble application
#
# License
# =======
#
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Password used for VoIP server
VOIP_SERVER_PASSWORD=
# Port on which VoIP server listens
VOIP_PORT=64738

# Location of VoIP database and configuration
VOIP_DATABASE="mumble-server.sqlite"
VOIP_CONFIG_FILE="mumble-server.ini"

function remove_mumble {
	if !grep -Fxq "install_mumble" $COMPLETION_FILE; then
		if ! grep -Fxq "install_voip" $COMPLETION_FILE; then
			return
		fi
	fi
	apt-get -y remove --purge mumble-server
	iptables -D INPUT -p udp --dport $VOIP_PORT -j ACCEPT
	iptables -D INPUT -p tcp --dport $VOIP_PORT -j ACCEPT
	function_check save_firewall_settings
	save_firewall_settings
	if [ -f /etc/mumble-server.ini ]; then
		rm /etc/mumble-server.ini
	fi
	sed -i '/install_mumble/d' $COMPLETION_FILE
	sed -i '/install_voip/d' $COMPLETION_FILE
	sed -i '/configure_firewall_for_voip/d' $COMPLETION_FILE
	sed -i '/VoIP /d' $COMPLETION_FILE
}

function get_voip_server_password {
	if [ -f /home/$MY_USERNAME/README ]; then
		if grep -q "VoIP server password" /home/$MY_USERNAME/README; then
			if [ ! $VOIP_SERVER_PASSWORD ]; then
				VOIP_SERVER_PASSWORD=$(cat /home/$MY_USERNAME/README | grep "VoIP server password" | awk -F ':' '{print $2}' | sed 's/^ *//')
			fi
		else
			if grep -q "Mumble server password" /home/$MY_USERNAME/README; then
				if [ ! $VOIP_SERVER_PASSWORD ]; then
					VOIP_SERVER_PASSWORD=$(cat /home/$MY_USERNAME/README | grep "Mumble server password" | awk -F ':' '{print $2}' | sed 's/^ *//')
				fi
			fi
		fi
	fi
}

function configure_firewall_for_voip {
	if [[ $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_SOCIAL" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" ]]; then
		return
	fi
	if grep -Fxq "configure_firewall_for_voip" $COMPLETION_FILE; then
		return
	fi
	if [[ $ONION_ONLY != "no" ]]; then
		return
	fi
	iptables -A INPUT -p udp --dport $VOIP_PORT -j ACCEPT
	iptables -A INPUT -p tcp --dport $VOIP_PORT -j ACCEPT
	function_check save_firewall_settings
	save_firewall_settings

	OPEN_PORTS+=("Mumble   $VOIP_PORT")
	echo 'configure_firewall_for_voip' >> $COMPLETION_FILE
}

function install_mumble {
	if [[ $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_SOCIAL" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" ]]; then
		return
	fi
	if grep -Fxq "install_mumble" $COMPLETION_FILE; then
		return
	fi
	if grep -Fxq "install_voip" $COMPLETION_FILE; then
		return
	fi
	apt-get -y install mumble-server

	function_check get_voip_server_password
	get_voip_server_password
	if [ ! $VOIP_SERVER_PASSWORD ]; then
		if [ -f $IMAGE_PASSWORD_FILE ]; then
			VOIP_SERVER_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"
		else
			VOIP_SERVER_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
			if [ ${#VOIP_SERVER_PASSWORD} -lt $MINIMUM_PASSWORD_LENGTH ]; then
				VOIP_SERVER_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
			fi
		fi
	fi

	# Make an ssl cert for the server
	if [ ! -f /etc/ssl/certs/mumble.dhparam ]; then
		${PROJECT_NAME}-addcert -h mumble --dhkey $DH_KEYLENGTH
		function_check check_certificates
		check_certificates mumble
	fi

	# Check that the cert was created
	if [ ! -f /etc/ssl/certs/mumble.crt ]; then
		echo $'VoIP server certificate not created'
		exit 57892
	fi
	if [ ! -f /etc/ssl/private/mumble.key ]; then
		echo $'VoIP server key not created'
		exit 57893
	fi
	if [ ! -d /var/lib/mumble-server ]; then
		mkdir /var/lib/mumble-server
	fi
	cp /etc/ssl/certs/mumble.* /var/lib/mumble-server
	cp /etc/ssl/private/mumble.key /var/lib/mumble-server
	chown -R mumble-server:mumble-server /var/lib/mumble-server

	sed -i "s|welcometext=.*|welcometext=\"<br />Welcome to $DEFAULT_DOMAIN_NAME <b>VoIP</b>.<br />Chat freely!<br />\"|g" /etc/mumble-server.ini

	if [[ $VOIP_SERVER_PASSWORD && $SYSTEM_TYPE != "$VARIANT_MESH" ]]; then
		sed -i "s|serverpassword=.*|serverpassword=$VOIP_SERVER_PASSWORD|g" /etc/mumble-server.ini
	fi

	sed -i 's|#autobanAttempts.*|autobanAttempts = 10|g' /etc/mumble-server.ini
	sed -i 's|#autobanTimeframe.*|autobanTimeframe = 120|g' /etc/mumble-server.ini
	sed -i 's|#autobanTime.*|autobanTime = 300|g' /etc/mumble-server.ini
	sed -i 's|#sendversion=.*|sendversion=False|g' /etc/mumble-server.ini
	sed -i 's|sendversion=.*|sendversion=False|g' /etc/mumble-server.ini
	if ! grep -q "allowping" /etc/mumble-server.ini; then
		echo 'allowping=False' >> /etc/mumble-server.ini
	fi
	sed -i 's|allowping=.*|allowping=False|g' /etc/mumble-server.ini
	sed -i 's|#sslCert=.*|sslCert=/var/lib/mumble-server/mumble.crt|g' /etc/mumble-server.ini
	sed -i 's|#sslKey=.*|sslKey=/var/lib/mumble-server/mumble.key|g' /etc/mumble-server.ini
	sed -i 's|#certrequired=.*|certrequired=True|g' /etc/mumble-server.ini
	sed -i 's|users=100|users=10|g' /etc/mumble-server.ini
	sed -i 's|#channelnestinglimit=10|channelnestinglimit=10|g' /etc/mumble-server.ini
	sed -i 's|#textmessagelength=.*|textmessagelength=1000|g' /etc/mumble-server.ini
	sed -i 's|textmessagelength=.*|textmessagelength=1000|g' /etc/mumble-server.ini
	sed -i 's|#imagemessagelength=.*|imagemessagelength=131072|g' /etc/mumble-server.ini
	sed -i 's|#allowhtml=.*|allowhtml=False|g' /etc/mumble-server.ini
	sed -i 's|allowhtml=.*|allowhtml=False|g' /etc/mumble-server.ini
	sed -i "s|port=.*|port=${VOIP_PORT}|g" /etc/mumble-server.ini

	VOIP_ONION_HOSTNAME=$(add_onion_service voip ${VOIP_PORT} ${VOIP_PORT})
	if ! grep -q $"VoIP onion domain" $COMPLETION_FILE; then
		echo "VoIP onion domain:$VOIP_ONION_HOSTNAME" >> $COMPLETION_FILE
	fi

	systemctl restart mumble-server

	if ! grep -q $"Mumble Server" /home/$MY_USERNAME/README; then
		echo '' >> /home/$MY_USERNAME/README
		echo '' >> /home/$MY_USERNAME/README
		echo $'Mumble Server' >> /home/$MY_USERNAME/README
		echo '=============' >> /home/$MY_USERNAME/README
		echo $"Mumble onion domain:$VOIP_ONION_HOSTNAME" >> /home/$MY_USERNAME/README
		echo $'Mumble server username: mumble-server' >> /home/$MY_USERNAME/README
		if [[ $SYSTEM_TYPE != "VARIANT_MESH" ]]; then
			echo $"Mumble server password: $VOIP_SERVER_PASSWORD" >> /home/$MY_USERNAME/README
		fi
		echo '' >> /home/$MY_USERNAME/README
		echo $'To connect to the Mumble server use your username and the server password shown above.' >> /home/$MY_USERNAME/README
		chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
		chmod 600 /home/$MY_USERNAME/README
	fi

	function_check configure_firewall_for_voip
	configure_firewall_for_voip
	echo 'install_mumble' >> $COMPLETION_FILE
}

# NOTE: deliberately no exit 0