#!/bin/bash -e
##########################################################################
# where am I ?
SCRIPTPATH="$( cd "$( dirname "${BASH_SOURCE[0]}")" && pwd)"
DYNAMICPATH="$(dirname "$SCRIPTPATH")/dynamic"

##########################################################################

name="$1"
ipv6="$2"
ipv4="$3"

if [ -z "$name" ] || [ -z "$ipv6" ]
then
    echo "Usage: $0 name ipv6 <ipv4>"
    exit 1
fi

# strip .burble.dn42 from name if it was included
name=${name%.burble.dn42}

##########################################################################

# the IPv4 arg is optional
if [ -z "$ipv4" ]
then
    echo "Updating DNS: $name -> $ipv6"
    line=$(printf "    [ '%s', '%s' ]," "$name" "$ipv6" )
else
    echo "Updating DNS: $name -> $ipv6 / $ipv4"
    line=$(printf "    [ '%s', '%s', '%s' ]," "$name" "$ipv6" "$ipv4")    
fi

##########################################################################

pushd "$DYNAMICPATH" >/dev/null

# don't update if the line already exists
if grep -Fx "$line" virtual.js >/dev/null 2>&1
then
    echo "DNS: Already exists, no change"
    exit 0
fi

# remove any existing lines
sed -i -e "/^    \[ '$name',/d" virtual.js

# add a new line for this host
sed -i -e "s!^    // insert here!    // insert here\n${line}!" virtual.js

# commit
git commit -a -m "Update $name"

popd > /dev/null
##########################################################################
# end of file