#!/bin/bash 
##########################################################################
# where am I ?
SCRIPTPATH="$(cd "$(dirname "$0")" ; pwd -P)"
DYNAMICPATH="$(cd ${SCRIPTPATH}/../dynamic; pwd -P)"

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

if [ $# -lt 2 ]
then
    echo "Usage: $0 name ipv6 <ipv4>"
    exit 1
fi

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

# 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
grep -Fx "$line" virtual.js > /dev/null 2>&1 
if [ $? -eq 0 ]
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
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# end of file