#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# IRC server 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/>.

IRC_PORT=6697
IRC_ONION_PORT=6697

# An optional password to log into IRC. This applies to all users
IRC_PASSWORD=

function upgrade_irc {
    echo ''
}

function backup_local_irc {
	echo ''
}

function backup_remote_irc {
	echo ''
}

function remove_irc {
	if ! grep -Fxq "install_irc" $COMPLETION_FILE; then
		return
	fi
	systemctl stop ngircd
	apt-get -y remove --purge ngircd
	apt-get -y remove --purge irssi
	if [ -d /etc/ngircd ]; then
		rm -rf /etc/ngircd
	fi
	iptables -D INPUT -p tcp --dport $IRC_PORT  -j ACCEPT
	iptables -D INPUT -p tcp --dport 1024:65535 --sport $IRC_PORT -j ACCEPT
	function_check save_firewall_settings
	save_firewall_settings
	function_check remove_onion_service
	remove_onion_service irc ${IRC_ONION_PORT}
	sed -i '/install_irc/d' $COMPLETION_FILE
	sed -i '/IRC /d' $COMPLETION_FILE
	sed -i '/configure_firewall_for_irc/d' $COMPLETION_FILE
}

function configure_firewall_for_irc {
	if [ ! -d /etc/ngircd ]; then
		return
	fi
	if grep -Fxq "configure_firewall_for_irc" $COMPLETION_FILE; then
		return
	fi
	if [[ $INSTALLED_WITHIN_DOCKER == "yes" ]]; then
		# docker does its own firewalling
		return
	fi
	if [[ $ONION_ONLY != "no" ]]; then
		return
	fi
	iptables -A INPUT -p tcp --dport $IRC_PORT  -j ACCEPT
	iptables -I INPUT -p tcp --dport 1024:65535 --sport $IRC_PORT -j ACCEPT
	function_check save_firewall_settings
	save_firewall_settings

	OPEN_PORTS+=("IRC      $IRC_PORT")
	echo 'configure_firewall_for_irc' >> $COMPLETION_FILE
}

function install_irc_server {
	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" || $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
		return
	fi
	if grep -Fxq "install_irc_server" $COMPLETION_FILE; then
		return
	fi
	apt-get -y install ngircd

	if [ ! -d /etc/ngircd ]; then
		echo $"ERROR: ngircd does not appear to have installed. $CHECK_MESSAGE"
		exit 53
	fi

	if [ ! -f /etc/ssl/certs/ngircd.dhparam ]; then
		${PROJECT_NAME}-addcert -h ngircd --dhkey $DH_KEYLENGTH
		function_check check_certificates
		check_certificates ngircd
	fi

	DEFAULTDOMAIN=$DEFAULT_DOMAIN_NAME
	if [[ $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
		DEFAULTDOMAIN="${DEFAULT_DOMAIN_NAME}.local"
	fi

	# create a login password if needed
	if [ ! $IRC_PASSWORD ]; then
		IRC_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
	fi

	echo '**************************************************' > /etc/ngircd/motd
	echo $'*           F R E E D O M B O N E   I R C        *' >> /etc/ngircd/motd
	echo '*                                                *' >> /etc/ngircd/motd
	echo $'*               Freedom in the Cloud             *' >> /etc/ngircd/motd
	echo '**************************************************' >> /etc/ngircd/motd
	sed -i 's|MotdFile = /etc/ngircd/ngircd.motd|MotdFile = /etc/ngircd/motd|g' /etc/ngircd/ngircd.conf
	sed -i "s/irc@irc.example.com/$MY_EMAIL_ADDRESS/g" /etc/ngircd/ngircd.conf
	sed -i "s/irc.example.net/$DEFAULTDOMAIN/g" /etc/ngircd/ngircd.conf
	sed -i "s|Yet another IRC Server running on Debian GNU/Linux|IRC Server of $DEFAULTDOMAIN|g" /etc/ngircd/ngircd.conf
	sed -i 's/;Password = wealllikedebian/Password =/g' /etc/ngircd/ngircd.conf
	sed -i 's|;CertFile = /etc/ssl/certs/server.crt|CertFile = /etc/ssl/certs/ngircd.crt|g' /etc/ngircd/ngircd.conf
	sed -i 's|;DHFile = /etc/ngircd/dhparams.pem|DHFile = /etc/ssl/certs/ngircd.dhparam|g' /etc/ngircd/ngircd.conf
	sed -i 's|;KeyFile = /etc/ssl/private/server.key|KeyFile = /etc/ssl/private/ngircd.key|g' /etc/ngircd/ngircd.conf
	sed -i "s/;Ports =.*/Ports = $IRC_PORT/1" /etc/ngircd/ngircd.conf
	sed -i "s/;Ports =.*/Ports = $IRC_PORT/2" /etc/ngircd/ngircd.conf
	sed -i "s/;Name = #ngircd/Name = #${PROJECT_NAME}/g" /etc/ngircd/ngircd.conf
	sed -i "s/;Topic = Our ngircd testing channel/Topic = ${PROJECT_NAME} chat channel/g" /etc/ngircd/ngircd.conf
	sed -i 's/;MaxUsers = 23/MaxUsers = 23/g' /etc/ngircd/ngircd.conf
	sed -i "s|;KeyFile = /etc/ngircd/#chan.key|KeyFile = /etc/ngircd/#${PROJECT_NAME}.key|g" /etc/ngircd/ngircd.conf
	sed -i "s/;CloakHost = cloaked.host/CloakHost = ${PROJECT_NAME}/g" /etc/ngircd/ngircd.conf
	IRC_SALT="$(create_password 30)"
	if [ -f $IMAGE_PASSWORD_FILE ]; then
		IRC_OPERATOR_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"
	else
		IRC_OPERATOR_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
	fi
	sed -i "s|;CloakHostSalt = abcdefghijklmnopqrstuvwxyz|CloakHostSalt = $IRC_SALT|g" /etc/ngircd/ngircd.conf
	sed -i 's/;ConnectIPv4 = yes/ConnectIPv4 = yes/g' /etc/ngircd/ngircd.conf
	sed -i 's/;MorePrivacy = no/MorePrivacy = yes/g' /etc/ngircd/ngircd.conf
	sed -i 's/;RequireAuthPing = no/RequireAuthPing = no/g' /etc/ngircd/ngircd.conf
	sed -i "s/;Name = TheOper/Name = $MY_USERNAME/g" /etc/ngircd/ngircd.conf
	sed -i "s/;Password = ThePwd/Password = $IRC_OPERATOR_PASSWORD/g" /etc/ngircd/ngircd.conf
	sed -i 's|;Listen =.*|Listen = 0.0.0.0,0.0.0.0:9050,127.0.0.1,127.0.0.1:9050|g' /etc/ngircd/ngircd.conf
	if [ $IRC_PASSWORD ]; then
		sed -i "0,/RE/s/Password =.*/Password =$IRC_PASSWORD/" /etc/ngircd/ngircd.conf
	fi
	# If we are on a mesh then DNS is not available
	if [[ $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
		sed -i "s/;DNS =.*/DNS = no/g" /etc/ngircd/ngircd.conf
	fi
	# upgrade a cypher
	sed -i 's|SECURE128|SECURE256|g' /etc/ngircd/ngircd.conf
	mkdir /var/run/ircd
	chown -R irc:irc /var/run/ircd
	mkdir /var/run/ngircd
	touch /var/run/ngircd/ngircd.pid
	chown -R irc:irc /var/run/ngircd

	IRC_ONION_HOSTNAME=$(add_onion_service irc ${IRC_PORT} ${IRC_ONION_PORT})
	if ! grep -q $"IRC onion domain" $COMPLETION_FILE; then
		echo "IRC onion domain:$IRC_ONION_HOSTNAME" >> $COMPLETION_FILE
	fi

	systemctl restart ngircd

	# keep the daemon running
	echo '' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo '# keep irc daemon running' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo 'IRC_RUNNING=$(pgrep ngircd > /dev/null && echo Running)' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo 'if [ ! $IRC_RUNNING ]; then' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo '  systemctl start ngircd' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo '  echo -n $CURRENT_DATE >> $LOGFILE' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo '  echo " IRC daemon restarted" >> $LOGFILE' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
	echo 'fi' >> /usr/bin/$WATCHDOG_SCRIPT_NAME

	if ! grep -q $"IRC Server" /home/$MY_USERNAME/README; then
		echo '' >> /home/$MY_USERNAME/README
		echo '' >> /home/$MY_USERNAME/README
		echo $'IRC Server' >> /home/$MY_USERNAME/README
		echo '==========' >> /home/$MY_USERNAME/README
		echo $'To connect to your IRC server in irssi:' >> /home/$MY_USERNAME/README
		echo '' >> /home/$MY_USERNAME/README
		if [[ $ONION_ONLY != 'yes' ]]; then
			echo "  irssi" >> /home/$MY_USERNAME/README
			echo "  /server add -auto -ssl $DEFAULTDOMAIN $IRC_PORT" >> /home/$MY_USERNAME/README
			echo "  /connect $DEFAULT_DOMAIN_NAME" >> /home/$MY_USERNAME/README
		else
			echo "  usetorwith irssi" >> /home/$MY_USERNAME/README
			echo "  /server add -auto $IRC_ONION_HOSTNAME $IRC_PORT" >> /home/$MY_USERNAME/README
			echo "  /connect $IRC_ONION_HOSTNAME" >> /home/$MY_USERNAME/README
		fi
		echo "  /join #${PROJECT_NAME}" >> /home/$MY_USERNAME/README
		chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
		chmod 600 /home/$MY_USERNAME/README
	fi

	function_check configure_firewall_for_irc
	configure_firewall_for_irc
	echo 'install_irc_server' >> $COMPLETION_FILE
}

function install_irc_client {
	if [[ $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_SOCIAL" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
		return
	fi
	if grep -Fxq "install_irc_client" $COMPLETION_FILE; then
		return
	fi
	apt-get -y install irssi

	if [ ! -d /home/$MY_USERNAME/.irssi ]; then
		mkdir /home/$MY_USERNAME/.irssi
	fi

	echo 'servers = (' > /home/$MY_USERNAME/.irssi/config
	echo '  {' >> /home/$MY_USERNAME/.irssi/config
	echo '    address = "chat.freenode.net";' >> /home/$MY_USERNAME/.irssi/config
	echo '    chatnet = "Freenode";' >> /home/$MY_USERNAME/.irssi/config
	echo '    port = "6667";' >> /home/$MY_USERNAME/.irssi/config
	echo '    autoconnect = "no";' >> /home/$MY_USERNAME/.irssi/config
	echo '  },' >> /home/$MY_USERNAME/.irssi/config
	echo '  {' >> /home/$MY_USERNAME/.irssi/config
	echo '    address = "irc.oftc.net";' >> /home/$MY_USERNAME/.irssi/config
	echo '    chatnet = "OFTC";' >> /home/$MY_USERNAME/.irssi/config
	echo '    port = "6667";' >> /home/$MY_USERNAME/.irssi/config
	echo '    autoconnect = "yes";' >> /home/$MY_USERNAME/.irssi/config
	echo '  },' >> /home/$MY_USERNAME/.irssi/config
	echo '  {' >> /home/$MY_USERNAME/.irssi/config
	echo "    address = \"127.0.0.1\";" >> /home/$MY_USERNAME/.irssi/config
	if [[ $ONION_ONLY == 'no' ]]; then
		echo "    port = \"${IRC_PORT}\";" >> /home/$MY_USERNAME/.irssi/config
		echo '    use_ssl = "yes";' >> /home/$MY_USERNAME/.irssi/config
	else
		IRC_ONION_HOSTNAME=$(cat $COMPLETION_FILE | grep "IRC onion domain" | awk -F ':' '{print $2}')
		echo "    port = \"${IRC_ONION_PORT}\";" >> /home/$MY_USERNAME/.irssi/config
		echo '    use_ssl = "no";' >> /home/$MY_USERNAME/.irssi/config
	fi
	echo '    chatnet = "Freedombone";' >> /home/$MY_USERNAME/.irssi/config
	echo '    ssl_verify = "no";' >> /home/$MY_USERNAME/.irssi/config
	echo '    autoconnect = "yes";' >> /home/$MY_USERNAME/.irssi/config
	if [ $IRC_PASSWORD ]; then
		echo "    password = \"${IRC_PASSWORD}\";" >> /home/$MY_USERNAME/.irssi/config
	fi
	echo '  }' >> /home/$MY_USERNAME/.irssi/config
	echo ');' >> /home/$MY_USERNAME/.irssi/config
	echo '' >> /home/$MY_USERNAME/.irssi/config
	echo 'chatnets = {' >> /home/$MY_USERNAME/.irssi/config
	echo '  Freedombone = {' >> /home/$MY_USERNAME/.irssi/config
	echo '    type = "IRC";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_kicks = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_msgs = "4";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_whois = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '  };' >> /home/$MY_USERNAME/.irssi/config
	echo '  Freenode = {' >> /home/$MY_USERNAME/.irssi/config
	echo '    type = "IRC";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_kicks = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_msgs = "4";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_whois = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '  };' >> /home/$MY_USERNAME/.irssi/config
	echo '  OFTC = {' >> /home/$MY_USERNAME/.irssi/config
	echo '    type = "IRC";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_kicks = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_msgs = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '    max_whois = "1";' >> /home/$MY_USERNAME/.irssi/config
	echo '  };' >> /home/$MY_USERNAME/.irssi/config
	echo '};' >> /home/$MY_USERNAME/.irssi/config
	echo '' >> /home/$MY_USERNAME/.irssi/config
	echo 'channels = (' >> /home/$MY_USERNAME/.irssi/config
	echo '  { name = "#freedombone"; chatnet = "Freedombone"; autojoin = "Yes"; },' >> /home/$MY_USERNAME/.irssi/config
	echo ');' >> /home/$MY_USERNAME/.irssi/config
	echo '' >> /home/$MY_USERNAME/.irssi/config
	echo 'settings = {' >> /home/$MY_USERNAME/.irssi/config
	echo "  core = { real_name = \"$MY_NAME\"; user_name = \"$MY_USERNAME\"; nick = \"$MY_USERNAME\"; };" >> /home/$MY_USERNAME/.irssi/config
	echo '  "fe-text" = { actlist_sort = "refnum"; };' >> /home/$MY_USERNAME/.irssi/config
	echo '};' >> /home/$MY_USERNAME/.irssi/config
	echo 'ignores = ( { level = "CTCPS"; } );' >> /home/$MY_USERNAME/.irssi/config

	chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.irssi

	echo 'install_irc_client' >> $COMPLETION_FILE
}

function install_irc {
	if grep -Fxq "install_irc" $COMPLETION_FILE; then
		return
	fi
	install_irc_server
	install_irc_client
	echo 'install_irc' >> $COMPLETION_FILE
}

# NOTE: deliberately no exit 0
