#!/bin/sh
# this is a script that is called whenever an HTML file is loaded
# arg1 is the original URL
# checks to see if there is an annotation file for the URL, and if so incorporates it

echo "Content_type: text/html"
echo

ARG=$1
ME=/home/pjbrown
TEMP=$ME/web_tmp/File_copy.xml # call it .xml to avoid recursion
# check if already running to prevent endless recursion
MARKER=$ME/tmp/pjb_html_helper
if test -f $MARKER; then
  rm -f $MARKER
  # current tactic
  # if pjb file, then make a copy to avoid recursion!
  if test X`expr substr "$1" 1 31` = "Xfile:$ME/public_html/"; then
      FILENAME=`expr substr "$1" 6 9999`
      cp $FILENAME $TEMP
      echo "Recursion! Made a copy to stop it"
      ARG=file:$TEMP
      USE_TEMP=true
      # todo We really should add a BASE to this file, or put $TEMP in the same dir as filename
  else
    echo Todo recursion for $1 >&2
    BROWSER=lynx # but not there!
    BROWSER=vi
    xterm -e $BROWSER "$1"
    exit 1
  fi
#else 
  # it seems that the shell requires at least one command after "else"
  # hence if all the commands are commented out, yjen "else" must be too
  #touch $MARKER
fi

PATH=.:/usr/ucb:/opt/jdk1.2.1/bin:/home/pjbrown/sunbin:/home/pjbrown/bin:/usr/java/bin:/usr/bin:/usr/local/bin:/bin:/usr/X11R6/bin:/usr/local/jdk/bin:/usr/X11R6/bin:/usr/local/jdk/bin:$PATH
export PATH

# special set up because HOSTTYPE is not set on apache at exeter
if test x"$SERVER_NAME" = x"www.dcs.ex.ac.uk"; then
  HOSTTYPE=sun4; export HOSTTYPE
fi

echo $0 called for $ARG
ANNDIR=$ME/annotation_experiments/guide_layers
if test x$USE_TEMP = xtrue; then
  $ANNDIR/web_experiment/to_web -u "$ARG"
  rm -f $TEMPFILE
else
  CHECKER=$ANNDIR/web_experiment/check_for_annotation
  cd $ANNDIR/helper
  touch $MARKER
  HELPER=yes # used by $CHECKER, etc.
  export HELPER
  $CHECKER "$ARG"
  rm -f $MARKER
fi