#!/bin/sh

echo "* try to open tronlab's moleflap"

HOST='moleflap.hq.c3d2.de'
STORE=~/.moletoken.c3d2
WLAN_NAME="<<</>>"
PREFIX_LEN=4

# END CONFIG
PORT=80
STORE_ENC="$STORE.enc"
STORE_TMP="$STORE.tmp"
LOCKFILE="$STORE.lock"

FORCE_PGP=0
WGET="wget"

checkhost() {
	# checks if host is reachable. returns 0 on success
	ping6 -c 1 $HOST >/dev/null 2>/dev/null
	if [ $? -eq 0 ]; then 
    	    WGET="wget --prefer-family=IPv6"
    	    return 0; 
	fi
	if [ "cygwin" = `uname -o | tr [:upper:] [:lower:]` ]
	then
	    ping $HOST 56 1 >/dev/null 2>/dev/null
	else
	    ping -c 1 $HOST >/dev/null 2>/dev/null
	fi
	if [ $? -eq 0 ]; then return 0; fi
	return 1;
}

n800() {
	# nokia maemo connection methode
        for i in `gconftool /system/osso/connectivity/IAP --all-dirs`; do
                NAME=`gconftool --get $i/name`;
                if [ "x$NAME" == "x$WLAN_NAME" ]; then
                        dbus-send --type=method_call --system --dest=com.nokia.icd /com/nokia/icd com.nokia.icd.connect string:${i##/system/osso/connectivity/IAP/} uint32:0;
                        echo -n "connect & wait...";
                        for j in $(seq 1 1 15); do
				checkhost
				if [ $? -eq 0 ]; then break; fi
				echo -n .
				sleep 1;
			done
                        echo
			break;
                fi;
        done;
}

PREFIX=""
prefix() {
    if [ -e $STORE ]; then
        PREFIX=`cat $STORE | cut -c1-$PREFIX_LEN`
    fi
    if [ "$PREFIX" = "" ]; then
    	echo "Please enter your prefix:"
    	read PREFIX
    fi
}

do_pgp() {
	# do pgp handling

    prefix

    if [ "$PREFIX" = "" ]; then
        return 1
    else
        $WGET -qO $STORE_ENC http://$HOST:$PORT/recover?$PREFIX
        # download failed
        if [ $? != 0 ]; then
            return 2
        fi
        if [ -e $STORE ]; then
            CSUM=`head -n 1 $STORE_ENC`
            OSUM=`cat $STORE | cut -c1-${#CSUM}`
        else
            CSUM="1"
            OSUM="2"
        fi
        if [ "x$CSUM" != "x$OSUM" ] || [ $FORCE_PGP != 0 ]; then
            rm -f $STORE_TMP
            tail -n +3 $STORE_ENC | gpg --decrypt --output $STORE_TMP
            if [ $? = 0 ]; then
                mv $STORE_TMP $STORE
                NSUM=`cat $STORE | cut -c1-${#CSUM}`
                return 0
            else
                return 3
            fi
        fi
        return 0
    fi

}


usage()
{
cat << EOF
usage: $0 options

try to open tronlab's moleflap

   --force-pgp force pgp decrypt
   --n800      nokia n8xx/n9xx connect mode
   --help      help
EOF
exit
}

removelock()
{
    rm $LOCKFILE
}

# Process command line arguments
for i in $@; do
        case "$i" in
                "--force-pgp") FORCE_PGP=1;;
                "--n800" ) CONNECT=n800;;
                "--help" ) usage;;
                * ) echo "Error!"; usage;;
        esac
done

# lockfile
if [ -e $LOCKFILE ]
then
    echo "lockfile exists ... exiting"
    exit 1
else
    echo $(date) > $LOCKFILE
fi

# test for connection
checkhost
if [ "$?" -eq "1" ]
then
	if [ "x$CONNECT" = "x" ]; then
		echo "can't ping host $HOST ... exiting"
		removelock
		exit 1;
	else
		$CONNECT;
	fi
fi

do_pgp
if [ $? -gt 2 ]; then
    echo "fatal error ... exiting"
    removelock
    exit 1
fi 

if [ -e $STORE ]
then
	token=`cat $STORE`
else
	echo "Please enter your valid token:"
	read token
	# save new token first
	echo "$token" > $STORE
fi

newtoken=`$WGET -qO - http://$HOST:$PORT/open?$token`

if [ "$?" -eq "0" ]
then
	echo "* check door ..."
	echo "$newtoken" > $STORE
else
	echo "* moleflap unreachable"
fi

removelock