#!/bin/bash
#
# rsdns-dc.sh - A Dynamic DNS Client for rackspace cloud DNS
#

# config file for variables.
if [ -e ~/.rsdns_config ]
then
  . ~/.rsdns_config
else
  printf "\n"
  printf "No config file found. Please see REAME.md"
  printf "\n"
  exit
fi

# load up our auth & funct library
if [ -e $RSPATH/lib/auth.sh ]
then
  . $RSPATH/lib/auth.sh
else
  printf "\n"
  printf "auth.sh not found, please check you RSPATH"
  printf "\n"
  exit 95
fi

if [ -e $RSPATH/lib/func.sh ]
then
  . $RSPATH/lib/func.sh
else
  printf "\n"
  printf "func.sh not found, please check you RSPATH"
  printf "\n"
  exit 95
fi

# Check for additional dependency
check_dep "dig"


#prints out the usage information on error or request.
function usage () {
    printf "\n"
    printf "rsdns-dc6.sh -n name \n"
    printf "\t-h Show this.\n"
    printf "\t-q Quiet.\n"
    printf "\n"
    printf "PLEASE NOTE: You need a ~/.rsdns_config config file, see README.md for Help!"
    printf "\n"
}

#prints words for master rsdns script output
function words () {
    printf "Dynamic DNS Client for rackspace cloud DNS for IPv6 \n"
}

#Get options from the command line.
while getopts "n:H::hqw" option
do
    case $option in
        n    ) NAME=$OPTARG ;;
        H    ) HOST=$OPTARG ;;
        h    ) usage;exit 0 ;;
        q    ) QUIET=1 ;;
        w    ) words;exit 0 ;;
    esac
done

# need a hostname.
if [ -z $NAME ]
    then
    usage
    exit 1
fi

# Only run if the internet is avilable

if [ -z $HOST ]
    then
    HOST="www.google.com"
fi

if ! ping6 -c 3 $HOST &>/dev/null
then
    if [[ $QUIET -eq 0 ]]; then
        echo "The Internet is down, cannot ping6 $HOST"
    fi
    exit
fi

# get and set our current IP address
IP=`curl -A "rsdns/$RSDNS_VERSION (https://github.com/linickx/rsdns)" -s -k http://ipv6.icanhazip.com`

# Check the RS DNS servers for the current A Record
AAAARECORD=`dig @ns.rackspace.com +short -t aaaa $NAME`

# if the IP doesn't match the A record update :)
if [ "$IP" != "$AAAARECORD" ];
then

    # Authenticate and get started
    get_auth $RSUSER $RSAPIKEY
    if test -z $TOKEN
        then
        if [[ $QUIET -eq 0 ]]; then
            echo Auth Token does not exist.
        fi
        exit 98
    fi
    if test -z "$MGMTSVR"
        then
        if [[ $QUIET -eq 0 ]]; then
            echo Management Server does not exist.
        fi
        exit 97
    fi

    # what domain does the host belong to?
    get_domain $NAME

    # set our record type
    RECORDTYPE="AAAA"

    # find the record ID for our $NAME
    get_recordid
    # get_recordid will bail if $NAME is not found, this is to stop cron jobs from creating many many records.

    # POST!
    RSPOST=`echo '{ "name" : "'$NAME'", "data" : "'$IP'" }'`

    RC=`curl -A "rsdns/$RSDNS_VERSION (https://github.com/linickx/rsdns)" -k -s -X PUT -H X-Auth-Token:\ $TOKEN -H Content-Type:\ application/json  -H Accept:\ application/json $DNSSVR/$USERID/domains/$DOMAINID/records/$RECORDID --data "$RSPOST" |tr -s '[:cntrl:]' "\n"`

    UPDATE=1
    rackspace_cloud
fi
#done.
