#!/usr/bin/perl

# Author: Bodo Eggert <7eggert@gmx.de>
# Status: pre-alpha
# License: GPL
# ObExcuse: This is my first perl script

#
# To use the script, make a subdirectory and save (or symlink)
# it there. This will be the script data directory.
# Adjust the path to your napshare temporary directory,
# any file not blacklisted and existing in that directory will be
# downloaded.
#
# While used as a filter, the filenames are normalized, matched
# against some filters and, depending on the result, written to
# 1.txt (new), 2.txt or 3.txt (different blocklists) as long as
# they are neither in f_getlist or f_blocklist.
#
# to download, move a line from 1.txt to f_getlist.
# to never display a line again, move it to f_blocklist.
# (if the filter is still active, rename the .txt-file first).
#

($cwd=$0)=~s/\/[^\/]*$//;
chdir $cwd;

#begin program variables
$GETLIST="f_getlist";
$BLOCKLIST="f_blocklist";
$NAPDIR="/d/napshare/"; #don't omit the slash!
#end program variables
#begin system variables
$FGREP="/usr/bin/fgrep";
#end system variables

$blocklist_f = "remix|.(wma|asf)\$|\\bentire album\\b";
$block_f="^t - [0-9]{7}|\^read ?me";
$blocklist_a = "\\b(Backstreet Boys|Janet Jackson|Missy Elliott)\\b";

$genres="\\&|[6-9]0s( music)?|alternative|copy (\([0-9]+\) )?of|new wave|oldies

$mode=' ';
$instring = $ARGV[0];
if(($instring=~s/^-(.)$/$1/)==1){
$mode=$instring;
$instring = $ARGV[1];
}

($ofilename, $size, $speed, $status, $tag) = split(/\//,$instring,5);

check: while(1) {
if($ofilename =~ /$block_f/i) {
$status=3;
last check;
}
($filename=$ofilename) =~ s/_|%20|\~/ /g;
$filename =~ s/\'| $//g;
$filename =~ s/-/ - /g;
$filename =~ s/ +/ /g;
$filename =~ s/(- )+/- /g;
do { $filename =~ s/^ -? ?//g;
} until(($filename =~ s/^($genres|\(($genres)\)|\[$genres\]|\{$genres\}
$filename =~ s/^ -? ?//g;
if(($filename =~ s/^\(([A-Za-z0-9, ]*)\)/$1 - /)
|| ($filename =~ s/^\(([A-Za-z0-9, ]*)\)/$1 - /)){
$filename =~ s/ +/ /g;
$filename =~ s/(- )+/- /g;
$filename =~ s/^ -? ?//g;
}

if(!system $FGREP, '-qsxi', '--', $filename, $GETLIST) {
$status=0;
} elsif(!system $FGREP, '-qsxi', '--', $filename, $BLOCKLIST){
$status=18;
} else {
$status=1;
##################################
if ($filename =~ /\.mp3$/i) {
($f=$filename) =~ s/(\.mp3)*$//i;
if ($f=~ /$blocklist_f/i) {
$status=2;
last check;
} elsif(-e $NAPDIR.$filename) {
$status=0;
last check;
}
@test = split(/ - /, $f, -1);
for($i=0;$i<@test;$i++){
if($test[$i] eq ""){splice(@test,$i,1);}
}
if(@test==1) {
@test = split(/[\(\)]/, $f, -1);
for($i=0;$i<@test;$i++){
if($test[$i] eq ""){splice(@test,$i,1);}
} }
if ($test[0] =~ /$blocklist_a/i) {
$status=2;
last check;
}

print @test.'#' .join(':', @test) . "\n";

# $status=0;
last check;
##################################
}
last check;
}
last check;
}

if($status == 0) { exit 0;}
if($status<16){
$LogFile = $status.".txt";
((-e $LogFile)? open(LOG,">>$LogFile"):open(LOG,">$LogFile"))
|| die("Can't open $LogFile: $!\n");
print LOG $filename."\n";
} else { print $status-16 .$filename."\n"; }

exit $status!=0;