#!/bin/sh
# Copyright (c) 2008 David R. Forrest (Forrest)
# 
# Permission to use, copy, modify, and distribute this material 
# for any purpose and without fee is hereby granted, provided 
# that the above copyright notice and this permission notice 
# appear in all copies, and that the name of Forrest not be 
# used in advertising or publicity pertaining to this 
# material without the specific, prior written permission 
# of an authorized representative of Forrest.  FORREST 
# MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY 
# OF THIS MATERIAL FOR ANY PURPOSE.  IT IS PROVIDED "AS IS", 
# WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.

# Converts octet-stream to display calls
# Idea from James Budiono 6/15/06 from Hyla Fax List posting
# D. R. Forrest 6/15/06 revised for my pine application
# DRF 6/20/07 updated  and clarified and added more types.
# DRF 12/21/07 added compressed and Opendocument types
# DRF 4/6/08 converted to a "case" from "elif" structure
# DRF 5/15/08 added some Open Office links under "data" types
# DRF 7/7/08  added .docx detection under "compressed" types


# FUNCTIONS START HERE
function cmd_exist
{
which $1 >/dev/null 2>&1 && return  # yes it does exist
echo "Need the command \"$1\" in the executable path to view this file. Sorry."
case $1 in

 tnef) 
 echo "See http://sourceforge.net/project/showfiles.php?group_id=57057 for a free download of tnef." ;;

 OdfConverter)
 echo "See http://www.oooninja.com/2008/01/convert-openxml-docx-etc-in-linux-using.html" ;;

 soffice)  echo "See http://www.libreoffice.org/" ;;

 xv) echo "See http://www.trilon.com/xv/" ;;

 *) ;;

esac
sleep 10
exit 
}

# SCRIPT STARTS HERE
cmd_exist file
cmd_exist awk
cmd_exist cp
cmd_exist rm
cmd_exist octet-stream
cmd_exist grep
cmd_exist cut
cmd_exist sleep

# Be especially careful that a target does NOT match a prior one in this list
# as FILETYPE is determined by FIRST match.
FILETYPE=$(file -b "$1" | awk '\
 /(Microsoft Office Document|Rich Text|OpenDocument|Corel|OpenOffice|CDF V2 Document)/ { print "office";next};\
 /Zip/ {print "compressed";next};\
 /gzip/ {print "gzipped";next};\
 /JPEG image data/ {print "jpg";next};\
 /Targa image data/ {print "Targa";next};\
 /bzip2/ {print "bzipped"; next};\
 /PDF.*4/ {print "pdfV4";next};\
 /PDF/ {print "pdf";next};\
 /(ASCII|shell script)/ {print "ascii";next};\
 /(PGP armored data|mail text|output text|calendar)/ {print "ascii";next};\
 /(UTF-8 Unicode English text|Unicode text)/ {print "ascii";next};\
 /HTML document text/ {print "html";next};\
 /PostScript/ {print "ps";next};\
 /vCard/ {print "vcard";next};\
 /Transport Neutral Encapsulation Format/ { print "tnef";next};\
 /(Microsoft ASF|Motion JPEG|MPEG|ISO Media)/ {print "video";next};\
 /(LSB relocatable|LSB executable|ELF 64-bit LSB|magic binary)/ {print "binexe";next};\
 /(image data|PNG image)/ {print "image";next};\
 /(JPEG|GIF|Netpbm PBM)/ {print "jpg";next};\
 /data/ {print "data";next};\
 /Qemu Image/ {print "Qemu";next};')

#echo  FILETYPE IS: \"$FILETYPE\" and the Work file is named: \""$1"\"  # for debuging
#cat "$1" >~/attachment  # for debuging
#env     # for debuging

[ -n "$SSH_CONNECTION" ]  && { echo "Remote display - try save"
                               sleep 6 ; exit; }
echo -e "\n...Viewing file $1 using octet-stream display script"

case $FILETYPE in
	office)   # it's MS-Office or OpenDocument group, use soffice
    cmd_exist soffice
    soffice -view "$1" ;;

	compressed)
    # Microsoft Office 2007 (*.[doc,ppt,xls]x) is also seen as a zip file
    case  "${1##*.}" in            # check only the filename extension
	docx|pptx|xlsx|pps) # LibreOffice v3.0 + will handle these (comment out ooV2 entries following)
	    cmd_exist soffice
	    soffice -view  "$1" ;;

#        docx) #  Office 2007+
#            #  Uses OdfConverter (this script x86_64) from:
#            #  http://www.oooninja.com/2008/01/convert-openxml-docx-etc-in-linux-using.html
#            cmd_exist OdfConverter
#            cmd_exist soffice
#            echo "Processing .docx file- May take a minute......"
#            OUTFILE=${1%.*}.odt        # Get converter output file name for soffice
#            OdfConverter /docx2odt /i  "$1" >/dev/null 2>&1
#            soffice -view "$OUTFILE"
#            rm  "$OUTFILE";;
	
#        pptx) #  Office 2007+
#            #  Uses OdfConverter (this script x86_64) from:
#            #  http://www.oooninja.com/2008/01/convert-openxml-docx-etc-in-linux-using.html
#            cmd_exist OdfConverter
#            cmd_exist soffice
#            echo "Processing .pptx file- May take a minute......"
#            OUTFILE=${1%.*}.odp        # Get converter output file name for soffice
#            OdfConverter /pptx2odp /i  "$1" >/dev/null 2>&1
#            soffice -view "$OUTFILE"
#            rm  "$OUTFILE";;

#         xlsx) #  Office 2007+
#            #  Uses OdfConverter (this script x86_64) from:
#            #  http://www.oooninja.com/2008/01/convert-openxml-docx-etc-in-linux-using.html
#            cmd_exist OdfConverter
#            cmd_exist soffice
#            echo "Processing .xlsx file- May take a minute......"
#            OUTFILE=${1%.*}.ods        # Get converter output file name for soffice
#            OdfConverter /xlsx2ods /i  "$1" >/dev/null 2>&1
#            soffice -view "$OUTFILE"
#            rm  "$OUTFILE";;
 
        *)  # a real Zip file
            cp "$1" "$1.zip"
            cmd_exist file-roller
            file-roller "$1.zip"
            rm "$1.zip" ;;
    esac ;;

	bzipped)
    cmd_exist tar
    tar -jtf  "$1" >/dev/null 2>&1 && {  # yes -  tarred
	cp "$1" "$1.tar.bz2"
        cmd_exist file-roller
	file-roller "$1.tar.bz2"
	rm "$1.tar.bz2"
	exit 
	}
    cp "$1" "$1.1.bz2"   # no - untarred
    cmd_exist bunzip2
    bunzip2  "$1.1.bz2"
    octet-stream "$1.1"
    rm "$1.1.bz2" "$1.1" ;;

	gzipped)
    cmd_exist tar
    tar -ztf  "$1" >/dev/null 2>&1 && {  # yes -  tarred
        cp "$1" "$1.tar.gz"
        cmd_exist file-roller
        file-roller "$1.tar.gz"
        rm "$1.tar.gz" 
        exit
	}
    cp "$1" "$1.1.gz"       # no - untarred
    cmd_exist gunzip
    gunzip  "$1.1.gz"
    octet-stream "$1.1"
    rm "$1.1.gz" "$1.1" ;;

	html)
    cmd_exist firefox  
    firefox "$1" ;;
       
	pdf)    # it is PDF, then display it
    cmd_exist evince
    evince "$1" ;;

	image)   # image uses eog
    cmd_exist eog
    eog "$1" ;;

	pdfV4)   # it is PDF version 1.4 
    cmd_exist evince
    evince "$1" ;;

	data | ascii)
    # bin/file returns "data" for .od? in addition to ascii types
    case  "${1##*.}" in                   # only the filename extension
	od[c,b,f,g,i,p,s,m,t] | ot[g,p,t] | sx[c,w] )  # soffice extensions
                cmd_exist soffice
		soffice -view "$1" ;;

		*)  # it's an ascii file or shell script, show it in a viewer
                cmd_exist gedit 
		gedit  "$1" ;;
    esac ;;

	ps)     # display it
    cmd_exist xv
    xv "$1" ;;

	jpg)    # display it
    cmd_exist xv
    xv "$1" ;;

	video)  # play it
    cmd_exist mplayer
    mplayer -vo x11 -zoom "$1" ;;

	tnef)   # Microsoft tnef
    cmd_exist tnef
    #   See http://sourceforge.net/project/showfiles.php?group_id=57057 for a free download of tnef.
    # Get the files into /tmp/tnef-docs
    [ -d /tmp/tnef_docs ] || mkdir -p /tmp/tnef_docs >/dev/null 2>&1 
    tnef --body-pref=all --number-backups --directory=/tmp/tnef_docs $1 
    # Display and delete files found by tnef using octet-stream 
    DIRSIZE=`ls -l /tmp/tnef_docs/|grep ^total |cut -b7-`
    test $DIRSIZE = 0 && { echo "No files in $1" ; sleep 5 ; exit 1; }  # bail if empty
    for i in /tmp/tnef_docs/*;
    do octet-stream "$i" && rm "$i" ;
    done
    ;;


	binexe) # binary, do not run it here - view only
    cmd_exist xv
    xv "$1";;

	vcard)  # We don't have any use for these yet - so ignore
    echo "Got a vCard! --ignoring...."
    sleep 10  ;;

	Targa)
    cmd_exist xv
    xv "$1" && exit  # first try it with eog, exit if it works
    echo "jbig image format -- needs libraries we do not have. Try save"
    file -b "$1"
    sleep 10  ;;

	Qemu)
    echo "A Qemu image file - large virtual memory image. Try save."
    file -b "$1"
    sleep 10  ;;

	* )
    echo " "
    cmd_exist xterm
    xterm -e echo -e "Sorry. Don't know how to handle $1. Try save. \n"
    file "$1"
    sleep 10 ;;
esac
exit 0