#!/bin/bash
# Script to be put in cron, to download scenery files
# written by: BP{k} 
#
# Changes:
# - fixed a parsing bug which prevented getting all the 
#   filenames from the index.html




# Get the directory listing first
MIRROR="ftp://ftp.flightgear.org/pub/fgfs/Scenery-0.9.10"
SOURCE="scenery-names"
LISTING="index.html"

#get a list of files from the mirror
if [ ! -f $SOURCE ]; then

    if [ ! -f $LISTING ]; then
        wget $MIRROR/
    fi

    cat $LISTING | grep tgz | awk -F . '{ print $6 "." $7 }' | awk -F \> '{ print $2 }' | awk -F \< '{ print $1 }' > $SOURCE
    rm $LISTING
fi


# How many files are we looking at ?
LENGTH=`wc -l $SOURCE | awk '{ print $1 }'`
COUNT=5


# Lets download them
until [ $COUNT -ge $LENGTH ]; do
    DGET=`cat $SOURCE | head -$COUNT | tail -5`
    BATCH=($DGET)
    NUM=0
    while [ $NUM -ne ${#BATCH[*]} ]; do
        wget -c $MIRROR/${BATCH[$NUM]}
        let NUM=$NUM+1
    done
 
     # This will update the script so that the next time its started the 
     # value of count will be 5 higher
     CNTVALUE=$COUNT
     let NEWCNT=$COUNT+5
 
     sed -e s/COUNT\=$CNTVALUE/COUNT\=$NEWCNT/g $0 > $0.new
     chmod 744 $0.new
     mv $0.new $0 
     exit
done
 
echo "All files have been downloaded. Nothing more to do"
echo "Enjoy the world in FlightGear!"
 
exit