#!/bin/bash

#
# This script looks up your lasf.fm loved titles RSS feed 
# ("loved" happens when you click on the heart :) and
# posts the latest unposted track on twitter and identica.
# It remembers the latest posting in $HOME/.lastfmloved2twitter 
# and it logs to $HOME/.lastfmloved2twitter.log
# Run it once a minute or something like that by editing 
# your crontab with
#   crontab -e
# inserting a line:
# * * * * * /usr/local/bin/lastfmloved2twitter
#
# USE AT OWN RISK!
#

#################################
# CONF HERE:

LAST_FM_USER="foobar"
TWITTER_USER="foobar"
TWITTER_PASSWORD="foobar"
IDENTICA_USER="foobar"
IDENTICA_PASSWORD="foobar"

# END OF CONF
#################################

# ONLINE? (fw-friendly, no icmp ;)
curl http://google.com &> /dev/null || {
  echo $(date) Offline...  >> $HOME/.lastfmloved2twitter.log
  exit 1
}

function tinyurl {
  tinyurl_result="$(curl -s -m 30 "http://tinyurl.com/create.php" -d url="$1" \
                   | egrep "<blockquote><b>http://tinyurl.com" \
                   | sed -r 's/<blockquote><b>([^<]*).*/\1/')"
  echo $tinyurl_result 
}

ITEM="$(curl --silent http://ws.audioscrobbler.com/2.0/user/$LAST_FM_USER/lovedtracks.rss | head -20 | grep -A 5 '<item>')"
PUBDATE="$(echo $ITEM | sed -r 's/.*<pubDate>([^<]*).*/\1/')"
OLD_PUBDATE="$(cat $HOME/.lastfmloved2twitter)"

[ -z "$PUBDATE" ] && {
  echo $(date) PUBDATE is empty.  >> $HOME/.lastfmloved2twitter.log
  exit 1
}

[ "$PUBDATE" = "$OLD_PUBDATE" ] || {
  # New Posting!
  echo "$PUBDATE" > $HOME/.lastfmloved2twitter

  TITLE="$(echo $ITEM | sed -r 's/.*<title>([^<]*).*/\1/')"
  LINK="$(echo $ITEM | sed -r 's/.*<link>([^<]*).*/\1/')"
  TINY_LINK="$(tinyurl "$LINK")"

  MESSAGE="Now playing (last.fm): $TITLE ($TINY_LINK)"

  echo $(date) $MESSAGE  >> $HOME/.lastfmloved2twitter.log

  curl --basic --user "$TWITTER_USER:$TWITTER_PASSWORD" --data-ascii "status=$(echo "$MESSAGE" | tr ' ' '+')" "http://twitter.com/statuses/update.json" &> /dev/null
  curl --basic --user "$IDENTICA_USER:$IDENTICA_PASSWORD" --data-ascii "status=$(echo "$MESSAGE" | tr ' ' '+')" "http://identi.ca/api/statuses/update.json" &> /dev/null
  exit 99
} 
  
# nothing to do...
# echo $(date) Nothing to do...  >> $HOME/.lastfmloved2twitter.log
exit 0