#!/bin/bash
# info: update memory rrd
# options: PERIOD
#
# The function is for updating memory rrd database and graphic.


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument definition
period=${1-daily}

# Includes
source $HESTIA/func/main.sh
source $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/mem" ]; then
    mkdir $RRD/mem
fi

# Checking database
if [ -e "$RRD/mem/mem.rrd" ]; then
    rrd_check=$(rrdtool info $RRD/mem/mem.rrd |grep "FREE")
    if [ -z "$rrd_check" ]; then
        rm -f $RRD/mem/mem.rrd
    fi
fi
if [ ! -e "$RRD/mem/mem.rrd" ]; then
    # Adding database
    rrdtool create $RRD/mem/mem.rrd --step $RRD_STEP \
        DS:RAM:GAUGE:600:U:U \
        DS:SWAP:GAUGE:600:U:U \
        DS:FREE:GAUGE: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 data
if [ "$period" = 'daily' ]; then
    mem=$(free -m)
    used=$(echo "$mem" |grep Mem |awk '{print $3}')
    if [ -z "$(echo "$mem" | grep available)" ]; then
        free=$(echo "$mem" |grep buffers/cache |awk '{print $4}')
    else
        free=$(echo "$mem" |grep Mem |awk '{print $7}')
    fi
    swap=$(echo "$mem" |grep Swap |awk '{print $3}')

    # Updating rrd
    rrdtool update $RRD/mem/mem.rrd N:$used:$swap:$free
fi

# Updating rrd graph
rrdtool graph $RRD/mem/$period-mem.png \
    --imgformat PNG \
    --height="150" \
    --width="670" \
    --start "$start" \
    --end "$end" \
    --vertical-label "Mbytes" \
    --x-grid "$grid" \
    -c "BACK#ffffff" \
    -c "SHADEA#ffffff" \
    -c "SHADEB#ffffff" \
    -c "FONT#555555" \
    -c "CANVAS#302c2d" \
    -c "GRID#666666" \
    -c "MGRID#AAAAAA" \
    -c "FRAME#302c2d" \
    -c "ARROW#FFFFFF" \
    DEF:used=$RRD/mem/mem.rrd:RAM:AVERAGE \
    DEF:swap=$RRD/mem/mem.rrd:SWAP:AVERAGE \
    DEF:free=$RRD/mem/mem.rrd:FREE:AVERAGE \
    COMMENT:'\r' \
    AREA:used#867995:"USED"\
    GPRINT:used:'LAST: Current\:''%8.0lf'  \
    GPRINT:used:'MIN: Min\:''%8.0lf'  \
    GPRINT:used:'MAX: Max\:''%8.0lf\j'  \
    LINE1:free#1c74cd:"FREE" \
    GPRINT:free:'LAST: Current\:''%8.0lf'  \
    GPRINT:free:'MIN: Min\:''%8.0lf'  \
    GPRINT:free:'MAX: Max\:''%8.0lf\j'\
    LINE2:swap#f57900:"SWAP" \
    GPRINT:swap:'LAST:Current\:''%8.0lf' \
    GPRINT:swap:'MIN:Min\:''%8.0lf' \
    GPRINT:swap:'MAX:Max\:''%8.0lf\j' &>/dev/null; result=$?


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

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

exit
