#!/bin/bash
#-------------------------------------------------------
# LINUX TWITTER NOW PLAYING SHELL SCRIPT
#
# Reads id3 tag of the mp3 file played by the your
# mp3 player. Puts it on twitter.
#
# Prereqs: Needs id3 installed.
#
# Example: twitternp "I love this song."
# Twitters: "I am listening to Get Your Snack On by Amon Tobin at the moment. I love this song."
# (you will be asked to confirm by pressing ENTER, so that you dont twitter garbage)
#
# Written by st0rz.net/storzblog, 2008
# This script might not work on your system.
# USE AT OWN RISK!
#
# Depending on how many files are open on your system
# this might work really slow ;/

#-------------------------------------------------------
#  _____ ____ ___ _____  
# | ____|  _ \_ _|_   _| 
# |  _| | | | | |  | |(_)
# | |___| |_| | |  | | _ 
# |_____|____/___| |_|(_)


USER=xxxxx
PASSWORD=xxxxxx

# mp3 player you are using
# tested with: xmms, vlc, rhythmbox
PLAYER="xmms"

# use the 2 keywords ARTIST and TITLE in any way here, will be replaced later on
NPMSG="I am listening to TITLE by ARTIST at the moment."


#  _____ _   _ ____           __   _____ ____ ___ _____ 
# | ____| \ | |  _ \    ___  / _| | ____|  _ \_ _|_   _|
# |  _| |  \| | | | |  / _ \| |_  |  _| | | | | |  | |  
# | |___| |\  | |_| | | (_) |  _| | |___| |_| | |  | |  
# |_____|_| \_|____/   \___/|_|   |_____|____/___| |_|  
#-------------------------------------------------------


#-------------------------------------------------------
# NOW PLAYING...

  id3 -v &> /dev/null || { echo "Please install id3." ; exit 1 ; }
  TRACK="$(lsof -b 2> /dev/null | grep "$PLAYER.*\.mp3" | expand | tr -s " " | cut -d" " -f9)"
  [ -n "$TRACK" ] || { echo "No mp3 playing at the moment." ; exit 2 ; }

  DATA="$(id3 -l $(lsof | grep "$PLAYER.*REG.*mp3" | expand | tr -s " " | cut -d" " -f9))"
  TITLE="$(echo "$DATA" | grep Title | sed -r 's/Title  : (.*)Artist.*/\1/g;s/^[ ]*//;s/[ ]*$//' )"
  ARTIST="$(echo "$DATA" | grep Artist | cut -d: -f3 | sed 's/^[ ]*//;s/[ ]*$//')"

  MESSAGE="$(echo "$NPMSG" | sed "s/ARTIST/$ARTIST/;s/TITLE/$TITLE/") $1"
  echo "$MESSAGE"
  echo "Continue? [ENTER] (Yes) or [CTRL-C] (No)"
  read

#-------------------------------------------------------
# Twittering...

echo
CHR="$(echo "$MESSAGE" | wc -m)"
if [ $CHR -gt 140 ] ; then
  echo "Warning: Message will be trunkated (> 140 chars)."
  echo "Continue? [ENTER] (Yes) or [CTRL-C] (No)"
  read
fi

curl --basic --user "${USER}:${PASSWORD}" --data-ascii "status=$(echo $MESSAGE|tr ' ' '+')" \
     "http://twitter.com/statuses/update.json" 
# you could analyze server answer here ;)
echo