#!/bin/bash

# Company:      PowerCraft Technology
# Author:       Copyright Jelle de Jong <jelledejong@powercraft.nl>
# Note:         Please send me an email if you enhanced the script
# Version:      0.0.3
# Date:         31-03-2008 / 2008-12-20 / 2009-01-14
# System:       Ubuntu/Debian GNU/Linux
# Description:  Closing HSDPA USB Huawei E220/E156G/E180 Monitoring

# 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 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 General Public License for more de/usr/bin/tails.
#
# 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., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

#~ check=$(lsmod | grep option)
#~ [ -n "$check" ] && sudo rmmod option
#~
#~ check=$(lsmod | grep usbserial)
#~ [ -n "$check" ] && sudo rmmod usbserial
#~
#~ sudo modprobe usbserial vendor=0x12d1 product=0x1003

# set -x
# exec 2>/var/log/pct-mobile-internet-close.log

convert()
{
    value="$1"

    # credits: http://www.linuxjournal.com/article/9293
    kilo=$( echo "scale=2; $value / 1024" | bc )
    kiloint=$( echo "$value / 1024" | bc )

    mega=$( echo "scale=2; $kilo / 1024" | bc )
    megaint=$( echo "$kilo / 1024" | bc )

    giga=$( echo "scale=2; $mega / 1024" | bc )
    gigaint=$( echo "$mega / 1024" | bc )

    if [ $kiloint -lt 1 ]; then
        echo "$value bytes"
    elif [ $megaint -lt 1 ]; then
        echo "${kilo}KB"
    elif [ $gigaint -lt 1 ]; then
        echo "${mega}MB"
    else
        echo "${giga}GB"
    fi
}

active=$(ps aux | grep ppp-monitor | grep bwm-ng)

[ -n "$active" ] && /usr/bin/screen -x ppp-monitor -X quit && echo "closing existing screen session"

device=ppp0
deviceinfo=$(grep $device /proc/net/dev)
if [ -z "$deviceinfo" ]; then
    echo "no device info found"
    exit 1
fi

deviceinfo=${deviceinfo##*":"}
receive=$(echo $deviceinfo | awk '{print $1}')
transmit=$(echo $deviceinfo | awk '{print $9}')

DATANFILE="/var/lib/pct-mobile-internet/pct-mobile-internet.log"

if [ ! -e $DATANFILE ]
then
    echo 'sum_receive=0
sum_transmit=0
sum_transfer=0

abbo_start=2008/12/20
abbo_duration=30
abbo_days_left=0

last_receive_human_readable=0
last_transmit_human_readable=0

sum_receive_human_readable=0
sum_transmit_human_readable=0
sum_transfer_human_readable=0' > $DATANFILE
fi

sum_receive=$(grep --no-messages ^sum_receive= "$DATANFILE")
sum_transmit=$(grep --no-messages ^sum_transmit= "$DATANFILE")
sum_transfer=$(grep --no-messages ^sum_transfer= "$DATANFILE")

abbo_start=$(grep --no-messages ^abbo_start= "$DATANFILE")
abbo_duration=$(grep --no-messages ^abbo_duration= "$DATANFILE")

sum_receive=${sum_receive##*"="}
sum_transmit=${sum_transmit##*"="}
sum_transfer=${sum_transfer##*"="}

abbo_start=${abbo_start##*"="}
abbo_duration=${abbo_duration##*"="}

unixtime_abbo_start=$(date -d "$abbo_start" +%s)
unixtime_abbo_end=$(date -d "$abbo_start + $abbo_duration days" +%s)
unixtime_today=$(date +%s)
remaining=$(( $unixtime_abbo_end - $unixtime_today ))
abbo_days_left=$(($remaining/3600/24))

find="abbo_days_left=.*"
replace="abbo_days_left=$abbo_days_left"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

if [ ! -z $receive ] && [ ! -z $receive ]; then
    if [ ! $receive -gt 0 ] || [ ! $transmit -gt 0 ]; then
        echo "receive: $receive, transmit: $transmit"
        echo "not saving status file"
        exit 1
    fi
fi

new_receive=$(( $sum_receive + $receive ))
new_transmit=$(( $sum_transmit + $transmit ))
new_transfer=$(( $new_receive + $new_transmit ))

find="sum_receive=.*"
replace="sum_receive=$new_receive"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

find="sum_transmit=.*"
replace="sum_transmit=$new_transmit"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

find="sum_transfer=.*"
replace="sum_transfer=$new_transfer"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

last_receive_human_readable=$(convert $receive)
last_transmit_human_readable=$(convert $transmit)

find="last_receive_human_readable=.*"
replace="last_receive_human_readable=$last_receive_human_readable"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

find="last_transmit_human_readable=.*"
replace="last_transmit_human_readable=$last_transmit_human_readable"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

new_receive_human_readable=$(convert $new_receive)
new_transmit_human_readable=$(convert $new_transmit)
new_transfer_human_readable=$(convert $new_transfer)

find="sum_receive_human_readable=.*"
replace="sum_receive_human_readable=$new_receive_human_readable"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

find="sum_transmit_human_readable=.*"
replace="sum_transmit_human_readable=$new_transmit_human_readable"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

find="sum_transfer_human_readable=.*"
replace="sum_transfer_human_readable=$new_transfer_human_readable"
sed -i -e "s,$find,$replace,g" "$DATANFILE"

# [ -e /etc/network/interfaces.huawei.backup ] && mv --verbose /etc/network/interfaces.huawei.backup /etc/network/interfaces

exit