#!/bin/bash


HEIGHT="97%"
HEAD=\<html\>
TAIL=\<\/html\>

# Create html files, one per picture.
# Use sort to make certain of order of files for $PREV tags.
for i in $(ls *.jpg| sort -n)
do FILE=$(echo $i|sed s/.jpg/.html/)
   echo $HEAD > $FILE
   echo \<img src=\"$i\" style=\"height:$HEIGHT\;\" \> >>$FILE #"
   echo \<br\> >>$FILE
   echo  \<a href=$PREV\>previous \</a\> >>$FILE
   echo  "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" >>$FILE
   export PREV=$FILE
done

# Complete and close html files. 
# Reverse sort makes certain of order of files for $NEXT tags.
for i in $(ls *jpg| sort -nr)
do FILE=$(echo $i|sed s/.jpg/.html/)
   echo  \<a href=\"$NEXT\"  style=\"align:right\;\" \>next \</a\> >>$FILE #"
   echo $TAIL >>$FILE
   export NEXT=$FILE 
done

# Special treatment for first and last files in directory, so that
# page links "wrap around".

count=1
for i in $(ls *.jpg|sort -n)
do eval PIC$count=$i
   eval PREV=PIC$((count -1))
   LAST=$i
   LAST2=$(set |grep $PREV|grep jpg|cut -d = -f 2)
   count=$((count + 1))
done

# First file
FILE=$(echo $PIC1|sed s/.jpg/.html/)
NEXT=$(echo $PIC2|sed s/.jpg/.html/)
PREV=$(echo $LAST|sed s/.jpg/.html/)
#echo FILE=$FILE; echo NEXT=$NEXT; echo PREV=$PREV

echo $HEAD>$FILE
echo \<img src=\"$PIC1\" style=\"height:$HEIGHT\;\" \> >>$FILE
echo \<br\> >>$FILE
echo \<a href=$PREV\>previous \</a\> >>$FILE
echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" >>$FILE
echo  \<a href=\"$NEXT\"  style=\"align:right\;\" \>next \</a\> >>$FILE
echo $TAIL >>$FILE

# Last file
FILE=$(echo $LAST|sed s/.jpg/.html/)
NEXT=$(echo $PIC1|sed s/.jpg/.html/)
PREV=$(echo $LAST2|sed s/.jpg/.html/)
#echo FILE=$FILE; echo NEXT=$NEXT; echo PREV=$PREV

echo $HEAD>$FILE
echo \<img src=\"$LAST\" style=\"height:$HEIGHT\;\" \> >>$FILE
echo \<br\> >>$FILE
echo \<a href=$PREV\>previous \</a\> >>$FILE
echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" >>$FILE
echo  \<a href=\"$NEXT\"  style=\"align:right\;\" \>next \</a\> >>$FILE
echo $TAIL >>$FILE