#!/bin/sh

usage() {
  cat <<__EOF__
usage: $(basename $0) [-hl] [-u user] [-X args] [-d args]
-h        print this help text
-l        print list of files to download
-u user   download as authenticated user
-X args   extra arguments to pass to xargs
-d args   extra arguments to pass to the download program

__EOF__
}

username=
xargsopts=
prompt=
list=
while getopts hlu:xX:d: option; do
  case $option in
  h)
    usage
    exit
    ;;
  l) list=yes ;;
  u)
    prompt=yes
    username="$OPTARG"
    ;;
  X) xargsopts="$OPTARG" ;;
  d) download_opts="$OPTARG" ;;
  ?)
    usage
    exit 2
    ;;
  esac
done

cat <<__EOF__
      Please note that running this script will result in the entire data collection to be downloaded, i.e. 1.09 GB in 96 files.

      To refine the selection and download, visit the following URL:

           https://archive.eso.org/scienceportal/home?data_collection=CAFFEINE

      and specify the relevant additional query constraints.

      Do you want to proceed with running this script (y/N)?
__EOF__

read continue_prompt

if [ "$continue_prompt" != "y" ]; then
  exit 0;
fi

if test -z "$xargsopts"; then
  #no xargs option speficied, we ensure that only one url
  #after the other will be used
  xargsopts='-L 1'
fi

if test -n "$prompt" -a -z "$list"; then
  trap 'stty echo 2>/dev/null; echo "Cancelled."; exit 1' INT HUP TERM
  stty -echo 2>/dev/null
  printf 'Password: '
  read password
  echo ''
  stty echo 2>/dev/null
fi

# use a tempfile to which only user has access
tempfile=$(mktemp /tmp/dl.XXXXXXXX 2>/dev/null)
test "$tempfile" -a -f $tempfile || {
  tempfile=/tmp/dl.$$
  (umask 077 && : >$tempfile)
}
trap 'rm -f $tempfile' EXIT INT HUP TERM

echo "auth_no_challenge=on" >$tempfile
# older OSs do not seem to include the required CA certificates for ESO
echo "check-certificate=off" >>$tempfile
if [ -n "$prompt" ]; then
  echo "--http-user=$username" >>$tempfile
  echo "--http-password=$password" >>$tempfile

fi
WGETRC=$tempfile
export WGETRC

unset password

if test -n "$list"; then
  cat
else
  xargs $xargsopts wget $download_opts
fi <<'__EOF__'
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.391
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.394
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.397
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.399
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.402
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.404
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.406
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.409
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.412
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.414
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.417
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.420
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.422
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.425
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.428
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.431
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.433
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.435
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.437
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.440
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.443
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https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.450
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.452
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.454
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.457
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.460
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.463
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.465
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.468
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.471
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.474
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https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.491
https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.494
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https://dataportal.eso.org/dataPortal/file/ADP.2024-07-12T08:07:39.629
__EOF__