#!/bin/sh

# TO DO (v0.94): 
# 1. 3-column mode, directory for helper files. 
# 2. Better sh compatibility
# CONCEPTS:
# 1. Hidden directory for helper files (dirname = .<output_file_name>)
# The directory named holds all helper files (in previous 
# version placed in current directory). Aim: To have clear directory with 
# files, simplify interface (less switches needed).
# 2. v0.93 does not works i.e. in ash an it should. Try to use ${variable}
# when deferrencing variables and use quotes and doble quotes where apropriate.
# Use -f instead of -e in test command!

## Version info
if [ "-v" = "${1}" -o "--version" = "${1}" ] 
then 
    cat <<!
pgg v0.94b
Photo Gallery Generator, (G) Tomas Brunclik 2000
Use under terms of GNU public licence.
!
    exit
fi

## Help
if [ "-h" = "${1}" -o "--help" = "${1}" ] 
then 
    cat <<!

Usage:	pgg [-o <filename>] [-3]
OR:	pgg -h
OR:	pgg -v

pgg - Photo Gallery Generator (this instance invoked as $0)
      Script to generate html photo gallery page from images in current 
      directory.

 -o, --output		Name of html file generated (default index.html)
 -3, --simple		3-column (simple) mode w/o descriptions
 -h, --help		Show this help screen
 -v, --version		Version info

Page consists of html header, table of thumbnails (w/ or without descriptions)
linked to full-size images and html footer. If files with header and footer are
not found, creates default ones in hidden directory. The same applies to 
optional files with image descriptions.
If exists file _<imagename> it is used as thumbnail for <imagename>. Otherwise 
is used dumb html resizing to 150x100. Full-size image file names should not 
begin with "_" though. ;-)
!
    exit
fi

## Set default values of variables
page=gallery.html         #default output file name
mode=1                  #default one column mode w/descriptions


## Check presence of users ~/.pgg directory (next version).
#if [ ! -d ~/.pgg ]
#then
#    mkdir ~/.pgg
#fi
#
## Check presence of users ~/.pgg/pggrc.
#if [ ! -e ~/.pgg/pggrc ]
#then
#    cp /usr/lib/pgg/pggrc ~/.pgg/pggrc
#fi
#
## Parse ini file. NEXT VERSION
# Search ini file in this order: ./.pggrc, ~/.pgg/pggrc.
# UNDER CONSTRUCTION ;-)


## Parse command-line parameters and set initial variables
while [ $# -gt 0 ]
    do
        case "$1" in
	    -o)	page="$2"; shift;;
	    --output) page="$2"; shift;;
	    -3) mode=3; shift;;
	    --simple) mode=3; shift;;
	esac
        shift
    done

## Now when output file name is defined definitely, create helper files 
#  subdirectory name and helper files file names.
dir=.${page}      #directory name for helper files subdirectory
head=${dir}/head       #default head file name
foot=${dir}/foot       #default foot file name
desc=${dir}/desc       #default desc file name

# TEST: DELETE LATER
echo page:  ${page}
echo dir:   ${dir}
echo head:  ${head}
echo foot:  ${foot}
echo desc:  ${desc}


## Test presence and create helper files directory
if [ ! -d ./${dir} ]
then
    mkdir ${dir}
    echo "Created directory ./${dir} "
fi

## Test presence and create missing helper files
# First head
if [ ! -f ${head} ]
then
  if [ -f /usr/lib/pgg/head ]
  then
    cp /usr/lib/pgg/head ${head}
    echo "Copied file ./${dir}/${head} from /usr/lib/pgg/head"
  else
    echo \<HTML\> > ${head}
    echo \<HEAD\>\</HEAD\> >> ${head}
    echo \<BODY\> >> ${head}
    echo \<CENTER\>\<H1\>Photo Gallery\</H1\>\</CENTER\> >> ${head}
    echo "Created file ${head} "
  fi
fi
# Then foot
if [ ! -f ${foot} ]
then
  if [ -f /usr/lib/pgg/foot ]
  then
    cp /usr/lib/pgg/foot ./${dir}/${foot}
    echo "Copied file ./${dir}/${foot} from /usr/lib/pgg/foot "
  else
    echo \<HR\>\<CENTER\> > ${foot}
    echo Created with \<A href=\"http://tom4.hyperlink.cz/software/linux.htm\#pgg\"\>pgg\</A\>,\&nbsp\; >> ${foot}
    echo Photo Gallery Generator for Linux/UNIX. >> ${foot}
    echo \</CENTER\>\</BODY\> >> ${foot}
    echo \</HTML\> >> ${foot}
    echo "Created file ${foot} "
  fi
fi


## Load list of *.jpg, *.jpeg files WITHOUT the thumbnails
## Process the list creating body of the html

# Define unique temporary filename for storing the body tags
body="${TMPDIR:=/tmp}/body$$"

# Remove the temporary file if anything wrong happens to the script ;-)
trap 'rm -f "${body}" >/dev/null 2>&1' 0
trap "exit 2" 1 2 3 15

# Start of html table
echo \<CENTER\>\<TABLE width=90%\> > ${body} 


## Loop through the images in current directory
## ${i} is current image file name, _${i} current thumbnail filename (if it exists)

# 1-column mode with the descriptions

if [ "1" = "$mode" ]
then
   for i in `ls -1 *.[jJ][pP]*[gG] | grep -v '^_'`
    do
	if [ -f _${i} ]
	then
	    echo \<TR\>\<TD width=\"150\"\> >> ${body}
	    echo \<A HREF=\"${i}\"\>\<IMG src=\"_${i}\"\>\</A\> >> ${body}
	    echo \</TD\> >> ${body}
	    echo \<TD\> >> ${body}
	    # If exists file with image description, write the description.
	    if [ -f $dir/${i}.txt ]
	    then
		cat $dir/${i}.txt >> ${body}
	    # If the file does not exists, create it to ease its editing
	    else
	    	echo \<B\>${i}\</B\>\<BR\>No description. > $dir/${i}.txt
		cat $dir/${i}.txt >> ${body}
		echo Created file $dir/${i}.txt  
	    fi
	    echo \</TD\> >> ${body}
	    echo \</TR\> >> ${body}
	else
	    # Dumb html resizing to 150x100 (does not preserve aspect ratio!!)
	    echo \<TR\>\<TD width=\"150\"\> >> ${body}
	    echo \<A HREF=\"${i}\"\>\<IMG src=\"${i}\" width=\"150\" height=\"100\"\>\</A\> >> ${body}
	    echo \</TD\> >> ${body}
	    echo \<TD\> >> ${body}
	    # If exists file with image description, write the description.
	    if [ -f $dir/${i}.txt ]
	    then
		cat $dir/${i}.txt >> ${body}
	    # If the file does not exists, create it to ease its editing
	    else
	    	echo \<B\>${i}\</B\>\<BR\>No description. > $dir/${i}.txt
		cat $dir/${i}.txt >> ${body}
		echo Created file $dir/${i}.txt  
	    fi
	    echo \</TD\> >> ${body}
	    echo \</TR\> >> ${body}
	fi
    done
    echo \</TABLE\>\</CENTER\> >> ${body}    # End of html table

# 3-column mode without descriptions (simple mode)
else
   nextcol=1
   for i in `ls -1 *.[jJ][pP]*[gG] | grep -v '^_'`
    do
	if [ -f _${i} ]
	then
	    column=$nextcol
	    case "$column" in
	       1) nextcol=2
	          echo \<TR\>\<TD width=\"33\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"_${i}\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\> >> ${body}
	          ;;
	       2) nextcol=3
	          echo \<TD width=\"33\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"_${i}\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body} >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\> >> ${body}
	          ;;
	       3) nextcol=1
	          echo \<TD width=\"34\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"_${i}\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\>\</TR\> >> ${body}
	          ;;
	    esac
	else
	    # Dumb html resizing to 150x100 (does not preserve aspect ratio!!)
	    column=$nextcol
	    case "$column" in
	       1) nextcol=2
	          echo \<TR\>\<TD width=\"33\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"${i}\" width=\"150\" height=\"100\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\> >> ${body}
	          ;;
	       2) nextcol=3
	          echo \<TD width=\"33\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"${i}\" width=\"150\" height=\"100\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\> >> ${body}
	          ;;
	       3) nextcol=1
	          echo \<TD width=\"34\%\"\> >> ${body}
	          echo \<CENTER\> >> ${body}
	          echo \<A HREF=\"${i}\"\>\<IMG src=\"${i}\" width=\"150\" height=\"100\"\>\</A\> >> ${body}
	          echo \<BR\> >> ${body}
	          echo \<B\>${i}\</B\> >> ${body}
	          echo \</CENTER\> >> ${body}
	          echo \</TD\>\</TR\> >> ${body}
	          ;;
	    esac
        fi
    done
    if [ ! "3" = "$column" ]
    then
        echo \</TR\> >> ${body}
    fi
    echo \</TABLE\>\</CENTER\> >> ${body}    #End of html table
fi

## Create output file
cat ${head} > ${page}
cat ${body} >> ${page}
cat ${foot} >> ${page}