#!/bin/bash

# makes a quick set of clickable links to next and prev images
# math @ velocet dotte ca dec 2001
#
# v. 002	- now handles loop end to link first<>last images.
# v. 003 jul 07	- image click goes to next
# v. 004 aug 07 - optional size for image

[ -z "$1" ] &&\
   echo "Usage: $0 [-image tag option, eg width=200] (imagelist)" &&\
   exit

echo $1 | grep -q "^-" &&\
  imgop=`echo $1 | cut -c2-` &&\
  shift

for i in $*;  do 
 if [ -n "$first" -a -z "$second" ]; then	# save 2nd for later
   second=$i
 fi

 if [ -z "$first" ]; then 		# save first for later use.
   first=$i
 fi

 curname=$name				# curname is from prev img in loop
 name=$i
 namehref=`echo $name | sed 's/%/%25/g'`
 prev2name="$prev2.html"
 prev2name=`echo $prev2name | sed 's/%/%25/g'`
 if [ -n "$prev2" ]; then
   echo "<a href=$prev2name>Prev ($prev2)</a> &nbsp" > $curname.html
 fi
 echo "<a href=$namehref.html>Next ($i)</a><br><p><a href='$cur'><img src='$cur' $imgop></a>" >> $curname.html
 prev2=$cur
 cur=$i
done

# construct last file pointing next at first
i=$first
curname=$name
name=$i
namehref=`echo $name | sed 's/%/%25/g'`
prev2name="$prev2.html"
 prev2name=`echo $prev2name | sed 's/%/%25/g'`
echo "<a href=$prev2name>Prev ($prev2)</a> &nbsp" > $curname.html
echo "<a href=$namehref.html><b>FIRST</b></a> ($i)<br><p><a href='$cur'><img src=$cur $imgop></a>" >> $curname.html

# redo first file now that we know what last is (prev to first)
# 'first' file is created when we're on 2nd image $i
prev2=$cur
cur=$i
i=$second
curname=$name
name=$i
namehref=`echo $name | sed 's/%/%25/g'`
prev2name="$prev2.html"
prev2name=`echo $prev2name | sed 's/%/%25/g'`
echo "<a href=$prev2name><b>LAST</b> ($prev2)</a> &nbsp" > $curname.html
echo "<a href=$namehref.html>Next ($i)</a><br><p><a href='$cur'><img src=$cur $imgop></a>" >> $curname.html

rm .html