+# id3fs - a FUSE-based filesystem for browsing audio metadata
+# Copyright (C) 2010 Ian Beckwith <ianb@erislabs.net>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
package ID3FS::Path::Node;
use strict;
use warnings;
+require Exporter;
+use vars qw(@ISA @EXPORT $TYPE_BOOL $TYPE_TAG $TYPE_ARTIST $TYPE_ALBUM $TYPE_FILE);
+@ISA=qw(Exporter);
+@EXPORT=qw($TYPE_BOOL $TYPE_TAG $TYPE_ARTIST $TYPE_ALBUM $TYPE_FILE);
+($TYPE_BOOL, $TYPE_TAG, $TYPE_ARTIST, $TYPE_ALBUM, $TYPE_FILE)=(1..5);
+
sub new
{
my $proto=shift;
$self->{type}=shift;
$self->{name}=shift;
$self->{parents_id}=shift;
- if($self->{type} ne "boolean")
+ if($self->{type} != $TYPE_BOOL)
{
- my $table=ucfirst($self->{type});
- $table .= "s" unless($table=~/s$/);
+ my $table='';
+ if ($self->{type} == $TYPE_TAG) { $table="tags"; }
+ elsif($self->{type} == $TYPE_ARTIST) { $table="artists"; }
+ elsif($self->{type} == $TYPE_ALBUM) { $table="albums"; }
+ elsif($self->{type} == $TYPE_FILE) { $table="files"; }
$self->{id}=$db->lookup_id($table, $self->{name}, $self->{parents_id});
return undef unless(defined($self->{id}));
}
sub id { return shift->set("id", shift); }
sub parents_id { return shift->set("parents_id", shift); }
-sub print
-{
- my($self)=@_;
- my $op=$self->name();
- my $left=$self->left();
- my $right=$self->right();
- return "" unless($left || $right);
- my $str .= $self->print_node($left);
- $str .= (" " . $op . " ") if($op);
- $str .= $self->print_node($right);
- if($op || ($left && $right))
- {
- $str="(" . $str . ")";
- }
- return $str;
-}
-
-sub print_node
-{
- my($self, $node)=@_;
- return "" unless(defined($node));
- return $node->print() if(ref($node) eq "ID3FS::Path::Node");
- return $node->{name};
-}
-
sub to_sql
{
my($self, $hasvals, $not, @joins)=@_;
$not=0 unless(defined($not));
my @outjoins=();
- my $str='';
- # init
unless(@joins)
{
@outjoins = @joins = ("INNER");
}
- if($self->type() ne "boolean")
+ my $str='';
+
+ if($self->type() != $TYPE_BOOL)
{
- my $cnt=scalar(@joins)+1;
$str .= "t" . scalar(@joins) . ".id='" . $self->{id} . "'";
if($not && !$hasvals)
{
- $str .= " AND fxt" . scalar(@joins) . ".files_id IS NULL";
+ $str = "(" . $str . " AND fxt" . scalar(@joins) . ".files_id IS NULL)";
}
return ($str, @outjoins);
}
- else
+
+ my $left=$self->left();
+ my $right=$self->right();
+ return ("", @outjoins) unless($left || $right);
+
+ my ($leftstr, @leftjoins) = $left->to_sql($hasvals, $not, @joins) if($left);
+ push(@joins, @leftjoins);
+ push(@outjoins, @leftjoins);
+
+ my $op=$self->name();
+ if(defined($op))
{
- my $left=$self->left();
- my $right=$self->right();
- return ("", @outjoins) unless($left || $right);
- my ($leftstr, @leftjoins) = $left->to_sql($hasvals, $not, @joins) if($left);
- push(@joins, @leftjoins);
- push(@outjoins, @leftjoins);
- my $op=$self->name();
- if(defined($op) && $self->type() eq "boolean")
+ my $join=undef;
+ # if right child is a NOT, we don't need extra join/brackets
+ # NOT will do the same and we will end up with an extra one
+ unless($right && $right->name() && $right->name() eq "NOT")
{
- # if we are ANDing, add an inner join
+ # if we are ANDing or ORing, add an inner join
# also if we are NOTing, but we are looking for a tag *value*
- if( ($op eq "AND") || ($hasvals && ($op eq "NOT")))
+ if($op eq "AND")
{
- # hack - if right child is a NOT, we don't need extra join/brackets
- # NOT will do the same and we will end up with an extra one
- unless($right && $right->name() && $right->name() eq "NOT")
- {
- push(@joins, "INNER");
- push(@outjoins, "INNER");
- }
+ $join= "INNER";
}
elsif($op eq "NOT")
{
$not=1;
- push(@joins, "LEFT");
- push(@outjoins, "LEFT");
-# print("LEFT: ", $left->print(), "\n") if ($left);
-# print("RIGHT: ", $right->print(), "\n") if($right);
+ $join = ($hasvals ? "INNER" : "LEFT");
+ }
+ elsif($op eq "OR")
+ {
+ $join="INNER" unless($left && $left->name() && $left->name() eq "NOT")
}
}
- my ($rightstr, @rightjoins) = $right->to_sql($hasvals, $not, @joins) if($right);
- push(@outjoins, @rightjoins);
-# print "LEFT (", scalar(@leftjoins), "): $leftstr\n";
-# print "RIGHT (", scalar(@rightjoins), "): $rightstr\n";
- my $str=$leftstr;
- $str .= " $op " if($op && !$not);
- $str .= $rightstr;
- if($op || ($left && $right))
+ if($join)
{
- $str="(" . $str . ")";
+ push(@joins, $join);
+ push(@outjoins, $join);
}
-# print "STR: $str\n";
- return($str, @outjoins);
}
+ my ($rightstr, @rightjoins) = $right->to_sql($hasvals, $not, @joins) if($right);
+ push(@outjoins, @rightjoins);
+ $str = $leftstr;
+ $str .= " $op " if($op && !$not);
+ $str .= $rightstr;
+ $str=("(" . $str . ")") if($op && $left && $right);
+ return($str, @outjoins);
}
sub used_tags
{
my($self)=@_;
- if($self->type() eq "boolean")
+ if($self->type() == $TYPE_BOOL)
{
my @used=();
push(@used, $self->left()->used_tags()) if($self->left());
projects / id3fs.git / blobdiff