#!/bin/bash
#
# Move "Artist - Album" to "Artist - Year - Album" (requires "id3v2" and "gawk").
# Written by Agilo on April 2, 2006.
#
# Note: don't bluntly use this without testing/modifying; this was made for my personal use.
#


# For each dir which holds an mp3 file containing "01".
for i in */*01*mp3 */*[cC][dD]1*/*01*mp3; do

 # Unset $SKIP (in case it's still set from the loop).
 unset SKIP;

 # Get the directory name.
 prog_dir=$(echo $i | gawk -F'/' '{print $1}');

 # Skip Pink Floyd and Camel (because they already have the year date in the directory names).
 if [ "`echo $prog_dir | gawk -F' - ' '{print $1}'`" == "Pink Floyd" ] || [ "`echo $prog_dir | gawk -F' - ' '{print $1}'`" == "Camel" ] || [ "`echo $prog_dir | gawk -F' - ' '{print $1}'`" == "Yes" ]; then
  # Set $SKIP.
  SKIP="TRUE";
 fi


 # If $SKIP is unset.
 if [ "$SKIP" != "TRUE" ]; then

  # Get the Year (this is a trivial way to do this, but it works..).
  prog_year=$(id3v2 -l "$i" | grep '(Year):' | gawk -F': ' '{print $2}');

  # Get the Artist name from directory name.
  prog_artist=$(echo $prog_dir | gawk -F' - ' '{print $1}');

  # Get the Album name from directory name.
  prog_album=$(echo $prog_dir | gawk -F' - ' '{print $2}');

  # If there is an empty Year, skip the moving process and report it.
  if [ -z $prog_year ]; 
   then echo -e "\n\nERROR, no \"Year\" found in: $prog_artist - $prog_album\n\n";
   sleep 2;
  else
   # Prevent douplicates.
   if [ "$OLD_MOVE" != "$prog_artist - $prog_album" ]; then
    # Move the directory.
    echo "mv \"$prog_artist - $prog_album\" \"$prog_artist - $prog_year - $prog_album\"";
    #echo "$prog_artist - $prog_year - $prog_album"
    # Set variable to prevent douplicates.
    OLD_MOVE="$prog_artist - $prog_album";
   fi
  fi

 fi
 
done