natgeo.sh

#!/bin/bash
 # Copyright (c) 2011 Josh Schreuder
 # http://www.postteenageliving.com
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
 # in the Software without restriction, including without limitation the rights
 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 # copies of the Software, and to permit persons to whom the Software is
 # furnished to do so, subject to the following conditions:
 #
 # The above copyright notice and this permission notice shall be included in
 # all copies or substantial portions of the Software.
 #
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 # ********************************
 # *** OPTIONS
 # ********************************
 # Set this to 'yes' to save a description (to ~/description.txt) from ngeo page
 GET_DESCRIPTION="yes"
 # Set this to the directory you want pictures saved
 PICTURES_DIR=~/Pictures
 # ********************************
 # *** FUNCTIONS
 # ********************************
 function get_page {
   echo "Downloading page to find image"
   wget http://photography.nationalgeographic.com/photography/photo-of-the-day/ --quiet -O- 2> /dev/null |
   grep -m 1 http://images.nationalgeographic.com/.*.jpg -o > /tmp/pic_url
 }
 function clean_up {
   # Clean up
   echo "Cleaning up temporary files"
   if [ -e "/tmp/pic_url" ]; then
     rm /tmp/pic_url
   fi
 }
 # ********************************
 # *** MAIN
 # ********************************
 echo "===================="
 echo "== NGEO Wallpaper =="
 echo "===================="
 # Set date
 TODAY=$(date +'%Y%m%d')
 # If we don't have the image already today
 if [ ! -e ~/Pictures/${TODAY}_ngeo.jpg ]; then
   echo "We don't have the picture saved, save it"
   get_page
   # Got the link to the image
   PICURL=`/bin/cat /tmp/pic_url`
   echo "Picture URL is: ${PICURL}"
   echo "Downloading image"
   wget --quiet $PICURL -O $PICTURES_DIR/${TODAY}_ngeo.jpg
   feh $PICTURES_DIR/${TODAY}_ngeo.jpg
   # Else if we have it already, check if it's the most updated copy
 else
   get_page
   # Got the link to the image
   PICURL=`/bin/cat /tmp/pic_url`
   echo "Picture URL is: ${PICURL}"
   # Get the filesize
   SITEFILESIZE=$(wget --spider $PICURL 2>&1 | grep Length | awk '{print $2}')
   FILEFILESIZE=$(stat -c %s $PICTURES_DIR/${TODAY}_ngeo.jpg)
   # If the picture has been updated
   if [ $SITEFILESIZE != $FILEFILESIZE ]; then
     echo "The picture has been updated, getting updated copy"
     rm $PICTURES_DIR/${TODAY}_ngeo.jpg
     # Got the link to the image
     PICURL=`/bin/cat /tmp/pic_url`
     echo "Downloading image"
     wget --quiet $PICURL -O $PICTURES_DIR/${TODAY}_ngeo.jpg
     echo "Here it is: "
     feh $PICTURES_DIR/${TODAY}_ngeo.jpg
   # If the picture is the same
   else
     echo "Picture is the same, finishing up"
     echo "Here it is: "
     feh $PICTURES_DIR/${TODAY}_ngeo.jpg
   fi
 fi
 clean_up