#!/bin/sh

#Native screen resolution:
SCREEN_RESOLUTION=1024
#Path to your ramdisk:
THUMBS="/tmp/cache_thumbs/"

if [ ! $1 ]; then 
    echo "usage $0 [/path/file(s)|/path/folder]"
    exit 1
fi

#clean old images, if exist:
if [ -d $THUMBS ];then
 rm -r $THUMBS
fi
mkdir $THUMBS
firstrun=1

if [ ! -f  /usr/bin/gpicview ]; then
    echo " /usr/bin/gpicview not found. End"
    echo " I suggest sudo apt-get install gpicview"
    exit 1
fi
if [ ! -f  /usr/bin/convert ]; then
    echo " /usr/bin/convert not found. End."
    echo " I suggest sudo apt-get install imagemagic"
    exit 1
fi



smart_thumbs(){
	echo "creating symlinks for all images."
	for file in $pattern; do
	    echo "symlink for $file is $THUMBS/`basename $file`"
	    ln -s $file $THUMBS/`basename $file`
	done  
	
	#start the image viewer
	(gpicview $THUMBS/`basename $file`)&
	
	for file in $pattern; do
	    #while there is a gpicview process it does substiute symlinks by thumbnails.
    	    ps -A | grep gpicview > /dev/null
    	    if [ $? = "0" ]; then
    		echo "Creating thumbnail for $file..."
    		convert -thumbnail $SCREEN_RESOLUTION $file $THUMBS/.output
    		rm $THUMBS/`basename $file`
    		mv $THUMBS/.output $THUMBS/`basename $file`
    		sleep 1
    	    fi
    	    #if [ $firstrun = 1 ]; then
    		#firstrun=0
    		#(gpicview $THUMBS/`basename $file`)&
    	    #fi
    	    sleep 0.01
    	done
}

#check if $1 is a directory or a file/some files:
if [ -d $1 ];then 
    PATHNAME="$1"
    echo Dirname is "$PATHNAME"
    pattern="$PATHNAME/*"
    smart_thumbs
fi
if [ -f $1 ]; then
    PATHNAME=`dirname $1`
    pattern="$*"
    echo Dirname is "$PATHNAME"
    echo Files $*
    smart_thumbs
fi


echo "Files converted. Wait with cleaning until the gpicview show is done."
ps -A | grep gpicview > /dev/null
while [ $? = "0" ];do
    sleep 2
    ps -A | grep gpicview > /dev/null
done
rm -r $THUMBS
echo "All done. See you next show."


exit 0