#!/usr/bin/perl
#
# Jukebox 0.2
#
# A music manager for Asterisk.
#
# Copyright (C) 2005-2006, Justin Tunney
#
# Justin Tunney <jesuscyborg@gmail.com>
#
# This program is free software, distributed under the terms of the
# GNU General Public License v2.
#
# Keep it open source pigs
#
# --------------------------------------------------------------------
#
# Uses festival to list off all your MP3 music files over a channel in
# a hierarchical fashion.  Put this file in your agi-bin folder which
# is located at: /var/lib/asterisk/agi-bin  Be sure to chmod +x it!
#
# Invocation Example:
#   exten => 68742,1,Answer()
#   exten => 68742,2,agi,jukebox.agi|/home/justin/Music
#   exten => 68742,3,Hangup()
#
#   exten => 68742,1,Answer()
#   exten => 68742,2,agi,jukebox.agi|/home/justin/Music|pm
#   exten => 68742,3,Hangup()
#
# Options:
#   p - Precache text2wave outputs for every possible filename.
#       It is much better to set this option because if a caller
#       presses a key during a cache operation, it will be ignored.
#   m - Go back to menu after playing song
#   g - Do not play the greeting message
#
# Usage Instructions:
#   - Press '*' to go up a directory.  If you are in the root music
#     folder you will be exitted from the script.
#   - If you have a really long list of files, you can filter the list
#     at any time by pressing '#' and spelling out a few letters you
#     expect the files to start with.  For example, if you wanted to
#     know what extension 'Requiem For A Dream' was, you'd type:
#     '#737'.  Note, phone keypads don't include Q and Z.  Q is 7 and
#     Z is 9.
#
# Notes:
# - This AGI script uses the MP3Player command which uses the
#   mpg123 Program.  Grab yourself a copy of this program by
#   going to http://www.mpg123.de/cgi-bin/sitexplorer.cgi?/mpg123/
#   Be sure to download mpg123-0.59r.tar.gz because it is known to
#   work with Asterisk and hopefully isn't the release with that
#   awful security problem.  If you're using Fedora Core 3 with
#   Alsa like me, make linux-alsa isn't going to work.  Do make
#   linux-devel and you're peachy keen.
#
# - You won't get nifty STDERR debug messages if you're using a
#   remote asterisk shell.
#
# - For some reason, caching certain files will generate the
#   error: 'using default diphone ax-ax for y-pau'.  Example:
#   # echo "Depeche Mode - CUW - 05 - The Meaning of Love" | text2wave -o /var/jukeboxcache/jukeboxcache/Depeche_Mode/Depeche_Mode_-_CUW_-_05_-_The_Meaning_of_Love.mp3.ul -otype ulaw -
#   The temporary work around is to just touch these files.
#
# - The background app doesn't like to get more than 2031 chars
#   of input.
#

use strict;

$|=1;

# Setup some variables
my %AGI; my $tests = 0; my $fail = 0; my $pass = 0;
my @masterCacheList = ();
my $maxNumber = 10;

while (<STDIN>) {
	chomp;
	last unless length($_);
	if (/^agi_(\w+)\:\s+(.*)$/) {
		$AGI{$1} = $2;
	}
}

# setup options
my $SHOWGREET = 1;
my $PRECACHE = 0;
my $MENUAFTERSONG = 0;

$PRECACHE = 1 if $ARGV[1] =~ /p/;
$MENUAFTERSONG = 1 if $ARGV[1] =~ /m/;
$SHOWGREET = 0 if $ARGV[1] =~ /g/;

# setup folders
my $MUSIC = $ARGV[0];
$MUSIC = &rmts($MUSIC);
my $FESTIVALCACHE = "/var/jukeboxcache";
if (! -e $FESTIVALCACHE) {
	`mkdir -p -m0776 $FESTIVALCACHE`;
}

# make sure we have some essential files
if (! -e "$FESTIVALCACHE/jukebox_greet.ul") {
	`echo "Welcome to the Asterisk Jukebox" | text2wave -o $FESTIVALCACHE/jukebox_greet.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_press.ul") {
	`echo "Press" | text2wave -o $FESTIVALCACHE/jukebox_press.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_for.ul") {
	`echo "For" | text2wave -o $FESTIVALCACHE/jukebox_for.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_toplay.ul") {
	`echo "To play" | text2wave -o $FESTIVALCACHE/jukebox_toplay.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_nonefound.ul") {
	`echo "There were no music files found in this folder" | text2wave -o $FESTIVALCACHE/jukebox_nonefound.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_percent.ul") {
	`echo "Percent" | text2wave -o $FESTIVALCACHE/jukebox_percent.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_generate.ul") {
	`echo "Please wait while Astrisk Jukebox cashes the files of your music collection" | text2wave -o $FESTIVALCACHE/jukebox_generate.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_invalid.ul") {
	`echo "You have entered an invalid selection" | text2wave -o $FESTIVALCACHE/jukebox_invalid.ul -otype ulaw -`;
}
if (! -e "$FESTIVALCACHE/jukebox_thankyou.ul") {
	`echo "Thank you for using Astrisk Jukebox, Goodbye" | text2wave -o $FESTIVALCACHE/jukebox_thankyou.ul -otype ulaw -`;
}

# greet the user
if ($SHOWGREET) {
	print "EXEC Playback \"$FESTIVALCACHE/jukebox_greet\"\n";
	my $result = <STDIN>; &check_result($result);
}

# go through the directories
music_dir_cache() if $PRECACHE;
music_dir_menu('/');

exit 0;

##########################################################################

sub music_dir_menu {
	my $dir = shift;

# generate a list of mp3's and directories and assign each one it's
# own selection number.  Then make sure that we've got a sound clip
# for the file name
	if (!opendir(THEDIR, rmts($MUSIC.$dir))) {
		print STDERR "Failed to open music directory: $dir\n";
		exit 1;
	}
	my @files = sort readdir THEDIR;
	my $cnt = 1;
	my @masterBgList = ();

	foreach my $file (@files) {
		chomp($file);
		if ($file ne '.' && $file ne '..' && $file ne 'festivalcache') { # ignore special files
			my $real_version = &rmts($MUSIC.$dir).'/'.$file;
			my $cache_version = &rmts($FESTIVALCACHE.$dir).'/'.$file.'.ul';
			my $cache_version2 = &rmts($FESTIVALCACHE.$dir).'/'.$file;
			my $cache_version_esc = &clean_file($cache_version);
			my $cache_version2_esc = &clean_file($cache_version2);

			if (-d $real_version) {
#		                                     0:id    1:type 2:text2wav-file      3:for-filtering             4:the-directory 5:text2wav echo
				push(@masterBgList, [$cnt++, 1,     $cache_version2_esc, &remove_special_chars($file), $file,          "for the $file folder"]);
			} elsif ($real_version =~ /\.mp3$/) {
#		                                     0:id    1:type 2:text2wav-file      3:for-filtering             4:the-mp3
				push(@masterBgList, [$cnt++, 2,     $cache_version2_esc, &remove_special_chars($file), $real_version,  "to play $file"]);
			}
		}
	}
	close(THEDIR);

	my @filterList = @masterBgList;

	if (@filterList == 0) {
		print "EXEC Playback \"$FESTIVALCACHE/jukebox_nonefound\"\n";
		my $result = <STDIN>; &check_result($result);
		return 0;
	}

	for (;;) {
MYCONTINUE:

# play bg selections and figure out their selection
		my $digit = '';
		my $digitstr = '';
		for (my $n=0; $n<@filterList; $n++) {
			&cache_speech(&remove_file_extension($filterList[$n][5]), "$filterList[$n][2].ul") if ! -e "$filterList[$n][2].ul";
			&cache_speech("Press $filterList[$n][0]", "$FESTIVALCACHE/jukebox_$filterList[$n][0].ul") if ! -e "$FESTIVALCACHE/jukebox_$filterList[$n][0].ul";
			print "EXEC Background \"$filterList[$n][2]&$FESTIVALCACHE/jukebox_$filterList[$n][0]\"\n";
			my $result = <STDIN>;
			$digit = &check_result($result);
			if ($digit > 0) {
				$digitstr .= chr($digit);
				last;
			}
		}
		for (;;) {
			print "WAIT FOR DIGIT 3000\n";
			my $result = <STDIN>;
			$digit = &check_result($result);
			last if $digit <= 0;
			$digitstr .= chr($digit);
		}

# see if it's a valid selection
		print STDERR "Digits Entered: '$digitstr'\n";
		exit 0 if $digitstr eq '';
		my $found = 0;
		goto EXITSUB if $digitstr =~ /\*/;

# filter the list
		if ($digitstr =~ /^\#\d+/) {
			my $regexp = '';
			for (my $n=1; $n<length($digitstr); $n++) {
				my $d = substr($digitstr, $n, 1);
				if ($d == 2) {
					$regexp .= '[abc]';
				} elsif ($d == 3) {
					$regexp .= '[def]';
				} elsif ($d == 4) {
					$regexp .= '[ghi]';
				} elsif ($d == 5) {
					$regexp .= '[jkl]';
				} elsif ($d == 6) {
					$regexp .= '[mno]';
				} elsif ($d == 7) {
					$regexp .= '[pqrs]';
				} elsif ($d == 8) {
					$regexp .= '[tuv]';
				} elsif ($d == 9) {
					$regexp .= '[wxyz]';
				}
			}
			@filterList = ();
			for (my $n=1; $n<@masterBgList; $n++) {
				push(@filterList, $masterBgList[$n]) if $masterBgList[$n][3] =~ /^$regexp/i;
			}
			goto MYCONTINUE;
		}

		for (my $n=0; $n<@masterBgList; $n++) {
			if ($digitstr == $masterBgList[$n][0]) {
				if ($masterBgList[$n][1] == 1) { # a folder
					&music_dir_menu(rmts($dir).'/'.$masterBgList[$n][4]);
					@filterList = @masterBgList;
					goto MYCONTINUE;
				} elsif ($masterBgList[$n][1] == 2) { # a file
# because *'s scripting language is crunk and won't allow us to escape
# funny filenames, we need to create a temporary symlink to the mp3
# file
					my $mp3 = &escape_file($masterBgList[$n][4]);
					my $link = `mktemp`;
					chomp($link);
					$link .= '.mp3';
					print STDERR "ln -s $mp3 $link\n";
					my $cmdr = `ln -s $mp3 $link`;
					chomp($cmdr);
					print "Failed to create symlink to mp3: $cmdr\n" if $cmdr ne '';
					
					print "EXEC MP3Player \"$link\"\n";
					my $result = <STDIN>; &check_result($result);

					`rm $link`;
					
					if (!$MENUAFTERSONG) {
						print "EXEC Playback \"$FESTIVALCACHE/jukebox_thankyou\"\n";
						my $result = <STDIN>; &check_result($result);
						exit 0;
					} else {
						goto MYCONTINUE;
					}
				}
			}
		}
		print "EXEC Playback \"$FESTIVALCACHE/jukebox_invalid\"\n";
		my $result = <STDIN>; &check_result($result);
	}
      EXITSUB:
}

sub cache_speech {
	my $speech = shift;
	my $file = shift;

	my $theDir = extract_file_dir($file);
	`mkdir -p -m0776 $theDir`;

	print STDERR "echo \"$speech\" | text2wave -o $file -otype ulaw -\n";
	my $cmdr = `echo "$speech" | text2wave -o $file -otype ulaw -`;
	chomp($cmdr);
	if ($cmdr =~ /using default diphone/) {
# temporary bug work around....
		`touch $file`;
	} elsif ($cmdr ne '') {
		print STDERR "Command Failed\n";
		exit 1;
	}
}

sub music_dir_cache {
# generate list of text2speech files to generate
	if (!music_dir_cache_genlist('/')) {
		print STDERR "Horrible Dreadful Error: No Music Found in $MUSIC!";
		exit 1;
	}

# add to list how many 'number' files we have to generate.  We can't
# use the SayNumber app in Asterisk because we want to chain all
# talking in one Background command.  We also want a consistent
# voice...
	for (my $n=1; $n<=$maxNumber; $n++) {
		push(@masterCacheList, [3, "Press $n", "$FESTIVALCACHE/jukebox_$n.ul"]) if ! -e "$FESTIVALCACHE/jukebox_$n.ul";
	}

# now generate all these darn text2speech files
	if (@masterCacheList > 5) {
		print "EXEC Playback \"$FESTIVALCACHE/jukebox_generate\"\n";
		my $result = <STDIN>; &check_result($result);
	}
	my $theTime = time();
	for (my $n=0; $n < @masterCacheList; $n++) {
		my $cmdr = '';
		if ($masterCacheList[$n][0] == 1) { # directory
			&cache_speech("for folder $masterCacheList[$n][1]", $masterCacheList[$n][2]);
		} elsif ($masterCacheList[$n][0] == 2) { # file
			&cache_speech("to play $masterCacheList[$n][1]", $masterCacheList[$n][2]);
		} elsif ($masterCacheList[$n][0] == 3) { # number
			&cache_speech($masterCacheList[$n][1], $masterCacheList[$n][2]);
		}
		if (time() >= $theTime + 30) {
			my $percent = int($n / @masterCacheList * 100);
			print "SAY NUMBER $percent \"\"\n";
			my $result = <STDIN>; &check_result($result);
			print "EXEC Playback \"$FESTIVALCACHE/jukebox_percent\"\n";
			my $result = <STDIN>; &check_result($result);
			$theTime = time();
		}
	}
}

# this function will fill the @masterCacheList of all the files that
# need to have text2speeced ulaw files of their names generated
sub music_dir_cache_genlist {
	my $dir = shift;
	if (!opendir(THEDIR, rmts($MUSIC.$dir))) {
		print STDERR "Failed to open music directory: $dir\n";
		exit 1;
	}
	my @files = sort readdir THEDIR;
	my $foundFiles = 0;
	my $tmpMaxNum = 0;
	foreach my $file (@files) {
		chomp;
		if ($file ne '.' && $file ne '..' && $file ne 'festivalcache') { # ignore special files
			my $real_version = &rmts($MUSIC.$dir).'/'.$file;
			my $cache_version = &rmts($FESTIVALCACHE.$dir).'/'.$file.'.ul';
			my $cache_version2 = &rmts($FESTIVALCACHE.$dir).'/'.$file;
			my $cache_version_esc = &clean_file($cache_version);
			my $cache_version2_esc = &clean_file($cache_version2);

			if (-d $real_version) {
				if (music_dir_cache_genlist(rmts($dir).'/'.$file)) {
					$tmpMaxNum++;
					$maxNumber = $tmpMaxNum if $tmpMaxNum > $maxNumber;
					push(@masterCacheList, [1, $file, $cache_version_esc]) if ! -e $cache_version_esc;
					$foundFiles = 1;
				}
			} elsif ($real_version =~ /\.mp3$/) {
				$tmpMaxNum++;
				$maxNumber = $tmpMaxNum if $tmpMaxNum > $maxNumber;
				push(@masterCacheList, [2, &remove_file_extension($file), $cache_version_esc]) if ! -e $cache_version_esc;
				$foundFiles = 1;
			}
		}
	}
	close(THEDIR);
	return $foundFiles;
}

sub rmts { # remove trailing slash
	my $hog = shift;
	$hog =~ s/\/$//;
	return $hog;
}

sub extract_file_name {
	my $hog = shift;
	$hog =~ /\/?([^\/]+)$/;
	return $1;
}

sub extract_file_dir {
	my $hog = shift;
	return $hog if ! ($hog =~ /\//);
	$hog =~ /(.*)\/[^\/]*$/;
	return $1;
}

sub remove_file_extension {
	my $hog = shift;
	return $hog if ! ($hog =~ /\./);
	$hog =~ /(.*)\.[^.]*$/;
	return $1;
}

sub clean_file {
	my $hog = shift;
	$hog =~ s/\\/_/g;
	$hog =~ s/ /_/g;
	$hog =~ s/\t/_/g;
	$hog =~ s/\'/_/g;
	$hog =~ s/\"/_/g;
	$hog =~ s/\(/_/g;
	$hog =~ s/\)/_/g;
	$hog =~ s/&/_/g;
	$hog =~ s/\[/_/g;
	$hog =~ s/\]/_/g;
	$hog =~ s/\$/_/g;
	$hog =~ s/\|/_/g;
	$hog =~ s/\^/_/g;
	return $hog;
}

sub remove_special_chars {
	my $hog = shift;
	$hog =~ s/\\//g;
	$hog =~ s/ //g;
	$hog =~ s/\t//g;
	$hog =~ s/\'//g;
	$hog =~ s/\"//g;
	$hog =~ s/\(//g;
	$hog =~ s/\)//g;
	$hog =~ s/&//g;
	$hog =~ s/\[//g;
	$hog =~ s/\]//g;
	$hog =~ s/\$//g;
	$hog =~ s/\|//g;
	$hog =~ s/\^//g;
	return $hog;
}

sub escape_file {
	my $hog = shift;
	$hog =~ s/\\/\\\\/g;
	$hog =~ s/ /\\ /g;
	$hog =~ s/\t/\\\t/g;
	$hog =~ s/\'/\\\'/g;
	$hog =~ s/\"/\\\"/g;
	$hog =~ s/\(/\\\(/g;
	$hog =~ s/\)/\\\)/g;
	$hog =~ s/&/\\&/g;
	$hog =~ s/\[/\\\[/g;
	$hog =~ s/\]/\\\]/g;
	$hog =~ s/\$/\\\$/g;
	$hog =~ s/\|/\\\|/g;
	$hog =~ s/\^/\\\^/g;
	return $hog;
}

sub check_result {
	my ($res) = @_;
	my $retval;
	$tests++;
	chomp $res;
	if ($res =~ /^200/) {
		$res =~ /result=(-?\d+)/;
		if (!length($1)) {
			print STDERR "FAIL ($res)\n";
			$fail++;
			exit 1;
		} else {
			print STDERR "PASS ($1)\n";
			return $1;
		}
	} else {
		print STDERR "FAIL (unexpected result '$res')\n";
		exit 1;
	}
}