#!/bin/bash
# info: update network rrd
# options: PERIOD
#
# example: v-update-sys-rrd-net
#
# This function is for updating network usage rrd database and graphic.

#----------------------------------------------------------#
#                Variables & Functions                     #
#----------------------------------------------------------#

# Argument definition
period=${1-daily}

# Includes
# shellcheck source=/etc/hestiacp/hestia.conf
source /etc/hestiacp/hestia.conf
# shellcheck source=/usr/local/hestia/func/main.sh
source $HESTIA/func/main.sh
# load config file
source_conf "$HESTIA/conf/hestia.conf"

#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Switching on time period
case $period in
	daily)
		start='-1d'
		end='now'
		grid='MINUTE:30:HOUR:1:HOUR:4:0:%H:%M'
		;;
	weekly)
		start='-7d'
		end='now'
		grid='HOUR:8:DAY:1:DAY:1:0:%a %d'
		;;
	monthly)
		start='-1m'
		end='now'
		grid='WEEK:1:WEEK:1:WEEK:1:0:%b %d'
		;;
	yearly)
		start='-1y'
		end='now'
		grid='MONTH:1:YEAR:1:MONTH:2:2419200:%b'
		;;
	*) exit "$E_RRD" ;;
esac

# Checking directory
if [ ! -d "$RRD/net" ]; then
	mkdir $RRD/net
fi

# Parsing network interfaces
ndev=$(cat /proc/net/dev)
ifaces=$(echo "$ndev" | grep : | cut -f 1 -d : | sed "s/ //g")

# Parsing excludes
if [ -z "$RRD_IFACE_EXCLUDE" ]; then
	RRD_IFACE_EXCLUDE='lo,docker0,br-.*,veth.*'
fi
for exclude in $(echo ${RRD_IFACE_EXCLUDE//,/ }); do
	ifaces=$(echo "$ifaces" | grep -vw "$exclude")
done

for iface in $ifaces; do
	# Checking database
	if [ ! -e "$RRD/net/$iface.rrd" ]; then
		# Adding database
		rrdtool create $RRD/net/$iface.rrd --step $RRD_STEP \
			DS:RX:COUNTER:600:U:U \
			DS:TX:COUNTER:600:U:U \
			RRA:AVERAGE:0.5:1:600 \
			RRA:AVERAGE:0.5:6:700 \
			RRA:AVERAGE:0.5:24:775 \
			RRA:AVERAGE:0.5:288:797 \
			RRA:MAX:0.5:1:600 \
			RRA:MAX:0.5:6:700 \
			RRA:MAX:0.5:24:775 \
			RRA:MAX:0.5:288:797
	fi

	# Parsing device stats
	if [ "$period" = 'daily' ]; then
		x=$(echo "$ndev" | sed "s/^ *//" | grep "^$iface:" | sed "s/:/ /")
		rx=$(echo "$x" | awk '{print $2}')
		tx=$(echo "$x" | awk '{print $10}')

		# Updating rrd database
		rrdtool update $RRD/net/$iface.rrd N:$rx:$tx
	fi

	# Updating rrd graph
	rrdtool graph $RRD/net/$period-$iface.png \
		--imgformat PNG \
		--height="150" \
		--width="670" \
		--start "$start" \
		--end "$end" \
		--vertical-label "KBytes" \
		--x-grid "$grid" \
		-c "BACK#ffffff" \
		-c "SHADEA#ffffff" \
		-c "SHADEB#ffffff" \
		-c "FONT#555555" \
		-c "CANVAS#302c2d" \
		-c "GRID#666666" \
		-c "MGRID#AAAAAA" \
		-c "FRAME#302c2d" \
		-c "ARROW#FFFFFF" \
		DEF:inoctets=$RRD/net/$iface.rrd:RX:AVERAGE \
		DEF:outoctets=$RRD/net/$iface.rrd:TX:AVERAGE \
		"CDEF:in=inoctets,8,*" \
		"CDEF:out=outoctets,8,*" \
		COMMENT:'\r' \
		AREA:in#C8EA2E:"Input (rx) " \
		GPRINT:in:'LAST: Current\:''%8.0lf' \
		GPRINT:in:'MIN: Min\:''%8.0lf' \
		GPRINT:in:'MAX: Max\:''%8.0lf\j' \
		LINE1:out#1c74cd:"Output (tx)" \
		GPRINT:out:'LAST:Current\:''%8.0lf' \
		GPRINT:out:'MIN:Min\:''%8.0lf' \
		GPRINT:out:'MAX:Max\:''%8.0lf\j' &> /dev/null
	result=$?

	if [ "$result" -ne 0 ]; then
		exit "$E_RRD"
	fi

done

#----------------------------------------------------------#
#                       Hestia                             #
#----------------------------------------------------------#

exit
