#!/bin/sh
# @(#$Id: rcldoc,v 1.8 2007-06-08 13:51:08 dockes Exp $  (C) 2004 J.F.Dockes
# Parts taken from Estraier:
#================================================================
# Estraier: a personal full-text search system
# Copyright (C) 2003-2004 Mikio Hirabayashi
#================================================================
#================================================================
# Extract text from an msword file by executing either antiword 
#  or wvware
#
#================================================================


# set variables
LANG=C ; export LANG
LC_ALL=C ; export LC_ALL
progname="rcldoc"
filetype=ms-word

decoder="antiword -t -i 1 -m UTF-8"



#RECFILTCOMMONCODE
##############################################################################
# !! Leave the previous line unmodified!! Code imported from the
# recfiltcommon file

# Utility code common to all shell filters. This could be sourced at run
# time, but it's slightly more efficient to include the code in the
# filters at build time (with a sed script).

# Describe error in a way that can be interpreted by our caller
senderror()
{
    echo RECFILTERROR $*
    # Also alert on stderr just in case
    echo ":2:$progname::: $*" 1>&2
    exit 1
}

iscmd()
{
    cmd=$1
    case $cmd in
    */*)
	if test -x $cmd -a ! -d $cmd ; then return 0; else return 1; fi ;;
    *)
      oldifs=$IFS; IFS=":"; set -- $PATH; IFS=$oldifs
      for d in $*;do test -x $d/$cmd -a ! -d $d/$cmd && return 0;done
      return 1 ;;
    esac
}

checkcmds()
{
    for cmd in $*;do
      if iscmd $cmd 
      then 
        a=1
      else 
        senderror HELPERNOTFOUND $cmd
      fi
    done
}

# show help message
if test $# -ne 1 -o "$1" = "--help" 
then
  echo "Convert a $filetype file to HTML text for Recoll indexing."
  echo "Usage: $progname [infile]"
  exit 1
fi

infile="$1"

# check the input file existence (may be '-' for stdin)
if test "X$infile" != X- -a ! -f "$infile"
then
  senderror INPUTNOSUCHFILE "$infile"
fi

# protect access to our temp files and directories
umask 77

##############################################################################
# !! Leave the following line unmodified !
#ENDRECFILTCOMMONCODE

checkcmds awk antiword iconv

# We need to do some strange stuff to retrieve the status from antiword. Things
# would be simpler if we relied on using bash.
# Explanations:
#http://stackoverflow.com/questions/1221833/bash-pipe-output-and-capture-exit-status

stdintoexitstatus() {
  read exitstatus
  return $exitstatus
}

# The strange 'BEGIN' setup is to prevent 'file' from thinking this file
# is an awk program
(((($decoder "$infile"; echo $? >&3) |
awk 'BEGIN'\
' {
  cont = ""
  gotdata = 0
}
{
  if (!($0 ~ /^[ 	]*$/) && gotdata == 0) {
    print "<html><head><title></title>"
    print "<meta http-equiv=\"Content-Type\" content=\"text/html;charset=UTF-8\">"
    print "</head>\n<body>\n<p>"
    gotdata = 1
  }
  $0 = cont $0
  cont = ""

  if ($0 ~ /[­-]$/) {
    # Note : soft-hyphen is iso8859 0xad
    # Break at last whitespace
    match($0, "[ \t][^ \t]+$")
    line = substr($0, 0, RSTART)
    cont = substr($0, RSTART, RLENGTH-1)
    $0 = line
  }

  if($0 == "\f") {
    print "</p><hr><p>"
    next
  } 

  if (gotdata == 1) {
    gsub(/&/, "\\&amp;", $0)
    gsub(/</, "\\&lt;", $0)
    gsub(/>/, "\\&gt;", $0)

    print $0 "<br>"
  }
}
END {
    if (gotdata == 1)
      print "</p></body></html>"
}' >&4) 3>&1) | stdintoexitstatus) 4>&1


# Antiword rarely fails, we try to catch the most common reasons:
if test $? -eq 1 ; then
    # Check actual document type 
    mtype=`file -b -i "$infile" | awk '{sub(";", "", $1);print $1}'`

    if test X"$mtype" = Xtext/rtf; then
      # RTF document disguising as msword either because it has a .doc
      # extension or because it's an attachment with a wrong mime.
      exec `dirname $0`/rclrtf "$infile"
    fi
    
    if test X"$mtype" = Xtext/plain; then
      # Someone gave a .doc ext to their texts. Happens...
      exec `dirname $0`/rcltext "$infile"
    fi

    if test X"$mtype" = Xapplication/msword; then
      # Actually application/msword: try wvWare, which is much
      # slower and we don't use it by default, but it handles some
      # files that antiword won't, so use it as a last resort.
      if iscmd wvWare ; then
        exec wvWare --nographics --charset=utf-8 "$infile"
      fi
    fi

    # else let the error be...
    exit 1
fi
