+# 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;
use strict;
use warnings;
-use ID3FS::PathElement::Artist;
-use ID3FS::PathElement::Album;
-use ID3FS::PathElement::Boolean;
-use ID3FS::PathElement::File;
-use ID3FS::PathElement::Tag;
-use ID3FS::PathElement::Tagval;
+use ID3FS::Path::Node;
+
+our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_BOOLEAN,
+ $STATE_ALBUMS, $STATE_TRACKLIST, $STATE_FILE, $STATE_ALL)=(0..7);
+
+# operator precedence
+our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
+
+our $PATH_ALLTRACKS= "TRACKS";
+our $PATH_NOARTIST = "NOARTIST";
+our $PATH_NOALBUM = "NOALBUM";
-our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
- $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
- $STATE_FILE)=(0..7);
+our $ENABLE_FILTER = 0;
sub new
{
my $self={};
bless($self,$class);
+ $self->{elements}=[];
$self->{db}=shift;
$self->{path}=shift;
+ $self->{verbose}=shift;
+ $self->{maxtagdepth}=shift;
+ $self->{curtagdepth}=0;
+ $self->{path} =~ s/\/\//\//g; # drop doubled slashes
+
$self->parse();
# print "STATE: ", $self->state(), "\n";
return $self;
sub isfile
{
my($self)=@_;
- return 1 if($self->state() == $STATE_FILE);
- return 0;
+ return($self->state() == $STATE_FILE);
}
sub isvalid
sub dest
{
- my($self)=@_;
+ my($self, $mountpoint)=@_;
if($self->state() == $STATE_FILE)
{
- return $self->{db}->filename(@{$self->{elements}});
+ return $self->filename($mountpoint);
}
return "ERROR"; #should never happen?
}
{
my($self)=@_;
my @dents=();
+ my @fents=();
my $state=$self->state();
# print "DIRENTS: STATE: $state\n";
- if($state==$STATE_TAG || $state==$STATE_TAGVAL)
+# print "DIRENTS: FILE: $self->{path}\n";
+ if($state==$STATE_ALL)
{
- my $tag=$self->{elements}->[$#{$self->{elements}}];
- if($state==$STATE_TAG &&
- defined($tag) &&
- ref($tag) eq "ID3FS::PathElement::Tag" &&
- $self->{db}->tag_has_values($tag->{id}))
+ @dents=($self->filter($PATH_ALLTRACKS, $PATH_NOARTIST), $self->artists());
+ }
+ elsif($state==$STATE_TAG)
+ {
+ my $tail=$self->tail();
+ if($self->is($TYPE_TAG, $tail) && $self->{db}->tag_has_values($tail->id()))
{
- @dents=$self->{db}->tag_values($tag->{id});
+ @dents=$self->tags();
}
else
{
- @dents=(qw(AND ALLTRACKS), # FIXME: NOT and OR
- $self->{db}->artists(@{$self->{elements}}));
+ if($self->{maxtagdepth} && ($self->{curtagdepth} < $self->{maxtagdepth}))
+ {
+ @dents=qw(AND OR);
+ }
+ push(@dents, $self->filter($PATH_ALLTRACKS, $PATH_NOARTIST), $self->artists());
}
}
elsif($state==$STATE_BOOLEAN)
{
- @dents=$self->{db}->tags(@{$self->{elements}});
+ my $parent=$self->tail();
+ unless($self->is($TYPE_BOOL, $parent) && $parent->{name} eq "NOT")
+ {
+ @dents=("NOT");
+ }
+ push(@dents,$self->tags());
}
elsif($state==$STATE_ROOT)
{
- @dents=("ALL", $self->{db}->tags(@{$self->{elements}}));
+ @dents=(qw(ALL NOT), $self->tags());
}
elsif($state==$STATE_ALBUMS)
{
- @dents=("TRACKS", $self->{db}->albums(@{$self->{elements}}));
+ @dents=$self->filter($PATH_ALLTRACKS, $PATH_NOALBUM, $self->albums());
}
elsif($state==$STATE_TRACKLIST)
{
- @dents=$self->{db}->tracks(@{$self->{elements}});
+ @fents=$self->tracks();
}
else
{
- print "DIRENTS: UNHANDLED STATE: $state\n";
+ print "id3fsd: INTERNAL ERROR: DIRENTS: UNHANDLED STATE: $state\n";
}
- return(@dents);
+ return(\@dents, \@fents);
}
+# State Machine Of Doom
sub parse
{
my($self)=@_;
+ $self->state($STATE_ROOT);
+ return if($self->{path} eq "/");
@{$self->{components}}=split(/\//, $self->{path});
shift @{$self->{components}}; # drop empty field before leading /
# print "PATH: $self->{path}\n";
- $self->state($STATE_ROOT);
- return if($self->{path} eq "/");
my @parts=@{$self->{components}};
my($tag, $tagval);
$self->{elements}=[];
- while(my $name=shift @parts)
+ $self->{in_all}=0;
+ my $root_not=0;
+ my $tags_seen=0;
+ while(defined(my $name=shift @parts))
{
# print "NAME: $name\n";
my $state=$self->state();
# print "SM: ROOT: $name\n";
if($name eq "ALL")
{
- $self->state($STATE_TAG);
+ $self->{in_all}=1;
+ $self->state($STATE_ALL);
+ }
+ elsif($name eq "NOT")
+ {
+ $root_not=1;
+ push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, $TYPE_BOOL, $name));
+ $self->state($STATE_BOOLEAN);
}
else
{
- $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
+ $tag=ID3FS::Path::Node->new($self->{db}, $TYPE_TAG, $name);
if($tag)
{
push(@{$self->{elements}}, $tag);
+ $tags_seen++;
$self->state($STATE_TAG);
}
else
}
}
}
- elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
+ elsif($state==$STATE_TAG)
{
+ my $tag=$self->tail();
# print "SM: TAG/TAGVAL($state): $name\n";
- my $tag=$self->{elements}->[$#{$self->{elements}}];
- if($state==$STATE_TAG &&
- defined($tag) &&
- ref($tag) eq "ID3FS::PathElement::Tag" &&
- $self->{db}->tag_has_values($tag->{id}))
+ if($self->is($TYPE_TAG, $tag) && $self->{db}->tag_has_values($tag->id()))
{
- my $tagval=ID3FS::PathElement::Tagval->new($name);
+# print "Parsing: parent: $tag->id()\n";
+ my $tagval=ID3FS::Path::Node->new($self->{db}, $TYPE_TAG, $name, $tag->id());
if(defined($tagval))
{
- $self->state($STATE_TAGVAL);
# stay in tag state
push(@{$self->{elements}}, $tagval);
}
$self->state($STATE_INVALID);
}
}
- elsif($name eq "ALLTRACKS")
+ elsif($name eq $PATH_ALLTRACKS)
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ elsif($name eq $PATH_NOARTIST)
{
$self->state($STATE_TRACKLIST);
}
elsif($name eq "AND")
{
$self->state($STATE_BOOLEAN);
-# push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
+ push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, $TYPE_BOOL, $name));
}
elsif($name eq "OR")
{
$self->state($STATE_BOOLEAN);
-# push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
- }
- elsif($name eq "NOT")
- {
- $self->state($STATE_TAG);
-# push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
+ push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, $TYPE_BOOL, $name));
}
else
{
- my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
+ my $artist=ID3FS::Path::Node->new($self->{db}, $TYPE_ARTIST, $name);
if($artist)
{
push(@{$self->{elements}}, $artist);
elsif($state==$STATE_BOOLEAN)
{
# print "SM: BOOLEAN: $name\n";
- my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
- if($tag)
+ my $parent=$self->tail();
+ my $allownot=1;
+ if($self->is($TYPE_BOOL, $parent) &&
+ $parent->{name} eq "NOT")
{
- push(@{$self->{elements}}, $tag);
- $self->state($STATE_TAG);
- }
+ $allownot=0;
+ }
+ if($allownot && $name eq "NOT")
+ {
+ $self->state($STATE_BOOLEAN);
+ push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, $TYPE_BOOL, $name));
+ }
else
{
- $self->state($STATE_INVALID);
+ my $tag=ID3FS::Path::Node->new($self->{db}, $TYPE_TAG, $name);
+ if($tag)
+ {
+ push(@{$self->{elements}}, $tag);
+ $tags_seen++;
+ $self->state($STATE_TAG);
+ }
+ else
+ {
+ $self->state($STATE_INVALID);
+ }
}
}
elsif($state==$STATE_ALBUMS)
{
# print "SM: ALBUM: $name\n";
- if($name eq "TRACKS")
+ if($name eq $PATH_ALLTRACKS)
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ elsif($name eq $PATH_NOALBUM)
{
$self->state($STATE_TRACKLIST);
}
else
{
- my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
+ my $album=ID3FS::Path::Node->new($self->{db}, $TYPE_ALBUM, $name);
if($album)
{
push(@{$self->{elements}}, $album);
elsif($state==$STATE_TRACKLIST)
{
# print "SM: TRACKLIST: $name\n";
- my $track=ID3FS::PathElement::File->new($self->{db}, $name);
- push(@{$self->{elements}}, $track);
+ my $track=ID3FS::Path::Node->new($self->{db}, $TYPE_FILE, $name);
if($track)
{
push(@{$self->{elements}}, $track);
# Can't have anything after a filename
$self->state($STATE_INVALID);
}
+ elsif($state==$STATE_ALL)
+ {
+ if($name eq $PATH_ALLTRACKS)
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ elsif($name eq $PATH_NOARTIST)
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ else
+ {
+ my $artist=ID3FS::Path::Node->new($self->{db}, $TYPE_ARTIST, $name);
+ if($artist)
+ {
+ push(@{$self->{elements}}, $artist);
+ $self->state($STATE_ALBUMS);
+ }
+ else
+ {
+ $self->state($STATE_INVALID);
+ }
+ }
+ }
else
{
print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
$self->state($STATE_INVALID);
}
}
+
+ my @elements=@{$self->{elements}};
+ # remove trailing boolean
+ while(@elements && $self->is($TYPE_BOOL, $elements[$#elements]))
+ {
+ pop @elements;
+ }
+# print "\nELEMENTS: ", join(' ', map { $_->name(); } @elements), "\n";
+ my @joins=$self->number_joins(@elements);
+ @joins=qw(INNER) unless(@joins);
+ $self->{joins}=\@joins;
+# print "AFTER: ", join(' ', map { $_->name() . "(" . $_->{table} . ")"; } @elements), "\n";
+# print "JOINS: ", join(', ', @joins), "\n";
+ # sort elements by precedence
+ @elements=$self->sort_elements(@elements);
+ $self->{tagtree}=$self->elements_to_tree(\@elements);
+}
+
+sub number_joins
+{
+ my($self, @elements)=@_;
+ my @joins=("INNER");
+ my $table=1;
+ my $nextjoin=undef;
+ my $lastop=undef;
+ return (@joins) unless(@elements);
+ while(my $thing=shift @elements)
+ {
+ if($thing->type() == $TYPE_BOOL)
+ {
+ my $op=$thing->name();
+ if($op eq "AND")
+ {
+ $nextjoin="INNER";
+ }
+ elsif($op eq "NOT")
+ {
+ $nextjoin="LEFT";
+ }
+ elsif($op eq "OR")
+ {
+ # NOT/foo/OR needs an extra join
+ $nextjoin="INNER" if($lastop && $lastop eq "NOT");
+ }
+ $lastop=$op;
+ }
+ else
+ {
+ if(@elements)
+ {
+ # if tag has a value, eat the tag, shifting to the value
+ $thing=shift(@elements) if($elements[0]->type() == $TYPE_TAG);
+ }
+ elsif($self->{db}->tag_has_values($thing->id()))
+ {
+ # if the expression ends in a tag that has a value
+ # (ie we have the tag and want the value)
+ # use an INNER join even if we were in a NOT
+ $nextjoin="INNER" if($nextjoin);
+ }
+ if($nextjoin)
+ {
+ $table++;
+ push(@joins, $nextjoin);
+ $nextjoin=undef;
+ }
+ $thing->table($table);
+ }
+ }
+ return @joins;
}
sub state
{
my($self, $newstate)=@_;
- $self->{state}=$newstate if(defined($newstate));
+ if(defined($newstate))
+ {
+ $self->{state}=$newstate;
+ $self->{curtagdepth}++ if($newstate == $STATE_TAG);
+ }
return $self->{state};
}
+# link up precedence-sorted list into a binary tree
+sub elements_to_tree
+{
+ my($self, $elements)=@_;
+ return undef unless(@$elements);
+ my ($left, $right, $op)=(undef, undef, undef);
+ my $thing=pop @$elements;
+ if($self->is($TYPE_BOOL, $thing))
+ {
+ $right=$self->elements_to_tree($elements);
+ if($thing->{name} ne "NOT")
+ {
+ $left=$self->elements_to_tree($elements);
+ }
+ $thing->left($left);
+ $thing->right($right);
+ }
+ return $thing;
+}
+
+# Dijkstra's shunting-yard algorithm
+sub sort_elements
+{
+ my ($self, @input)=@_;
+ my @opstack=();
+ my @output=();
+ while(my $thing = shift @input)
+ {
+ if($self->is($TYPE_TAG, $thing))
+ {
+ # Handle tag values by dropping parent
+ if(@input && $self->is($TYPE_TAG, $input[0]))
+ {
+ $thing=shift @input;
+ }
+ push(@output, $thing);
+ }
+ elsif($self->is($TYPE_BOOL, $thing))
+ {
+ while(@opstack &&
+ ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
+ {
+ push(@output, pop(@opstack));
+ }
+ push(@opstack, $thing);
+ }
+ }
+ while(@opstack)
+ {
+ push(@output, pop(@opstack));
+ }
+ return @output;
+}
+
+sub used_tags
+{
+ my($self)=@_;
+ return() unless(defined($self->{tagtree}));
+ return($self->{tagtree}->used_tags());
+}
+
+sub expecting_values
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_TAG, $tail))
+ {
+ return($self->{db}->tag_has_values($tail->id()));
+ }
+}
+
+sub trailing_tag_id
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_TAG, $tail))
+ {
+ return($tail->id());
+ }
+ return undef;
+}
+
+sub trailing_tag_parent
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_TAG, $tail))
+ {
+ return($tail->{parents_id});
+ }
+ return undef;
+}
+
+sub tail
+{
+ my($self)=@_;
+ return($self->{elements}->[$#{$self->{elements}}]);
+}
+
+sub is
+{
+ my($self, $type, $thing)=@_;
+ return 0 unless($thing);
+ return 0 unless($thing->type());
+ return 1 if($type == $thing->type());
+ return 0;
+}
+
+# the one before last
+sub tail_parent
+{
+ my($self)=@_;
+ return($self->{elements}->[($#{$self->{elements}}) - 1]);
+}
+
+######################################################################
+
+sub tags
+{
+ my($self)=@_;
+ if(!$self->{tagtree}) # / or /NOT
+ {
+ my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
+ return($self->{db}->cmd_firstcol($sql));
+ }
+ my $hasvals=$self->expecting_values();
+ my $sql="SELECT tags.name FROM ";
+ if($self->want_all_tags())
+ {
+ $sql .= "files_x_tags\n";
+ }
+ else
+ {
+ $sql .= ("(\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n");
+ }
+ $sql .= "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n";
+ my @andclauses=();
+ my $id=$self->trailing_tag_id();
+
+ my $parentclause= "tags.parents_id='";
+ $parentclause .= $id if($hasvals);
+ $parentclause .= "'";
+ push(@andclauses, $parentclause);
+
+ my @used=$self->used_tags();
+ if(@used)
+ {
+ push(@andclauses, "tags.id NOT IN (" . join(', ', @used) . ")");
+ }
+ if(@andclauses)
+ {
+ $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
+ }
+
+ $sql .= "GROUP BY tags.name;";
+ print "SQL(TAGS): $sql\n" if($self->{verbose});
+ my @tagnames=$self->{db}->cmd_firstcol($sql);
+ print("SUBNAMES: ", join(', ', @tagnames), "\n") if($self->{verbose});
+ return(@tagnames);
+}
+
+sub artists
+{
+ my($self)=@_;
+ if(!@{$self->{elements}}) # /ALL
+ {
+ my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
+ return($self->{db}->cmd_firstcol($sql));
+ }
+ my $sql=$self->sql_start("artists.name");
+ $sql .= ("INNER JOIN artists ON files.artists_id=artists.id\n" .
+ "WHERE artists.name != ''\n" .
+ "GROUP BY artists.name;");
+ print "SQL(ARTISTS): $sql\n" if($self->{verbose});
+ my @tagnames=$self->{db}->cmd_firstcol($sql);
+ print("ARTISTS: ", join(', ', @tagnames), "\n") if($self->{verbose});
+ return(@tagnames);
+}
+
+sub albums
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_ARTIST, $tail))
+ {
+ return $self->artist_albums($tail->id());
+ }
+ my $sql=$self->sql_start("albums.name");
+ $sql .= ("INNER JOIN albums ON files.albums_id=albums.id\n" .
+ "WHERE albums.name != ''\n" .
+ "GROUP BY albums.name;");
+ print "SQL(ALBUMS): \n$sql\n" if($self->{verbose});
+ my @names=$self->{db}->cmd_firstcol($sql);
+ print("ALBUMS: ", join(', ', @names), "\n") if($self->{verbose});
+ return(@names);
+}
+
+sub artist_albums
+{
+ my($self, $artist_id)=@_;
+ my $sql=$self->sql_start("albums.name");
+ $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "WHERE artists.id=? and albums.name <> ''\n" .
+ "GROUP BY albums.name\n");
+ print "ARTIST_ALBUMS SQL: $sql\n" if($self->{verbose});
+ my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
+ print("ALBUMS: ", join(', ', @albums), "\n") if($self->{verbose});
+ return(@albums);
+}
+
+sub artist_tracks
+{
+ my($self, $artist_id)=@_;
+ my $sql=$self->sql_start("files.name");
+ $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "WHERE artists.id=? AND albums.name=''\n" .
+ "GROUP BY files.name\n");
+ print "ARTIST_TRACKS SQL: $sql\n" if($self->{verbose});
+ my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
+ print("ARTISTTRACKS: ", join(', ', @names), "\n") if($self->{verbose});
+ return(@names);
+}
+
+sub album_tracks
+{
+ my($self, $artist_id, $album_id)=@_;
+ my $sql=("SELECT files.name FROM files\n" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "WHERE artists.id=? AND albums.id=?\n" .
+ "GROUP BY files.name\n");
+ print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n" if($self->{verbose});
+ my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
+ print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
+ return(@names);
+}
+
+sub tracks
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_ARTIST, $tail))
+ {
+ return $self->artist_tracks($tail->id());
+ }
+ elsif($self->is($TYPE_ALBUM, $tail))
+ {
+ my $artist_id=0;
+ my $artist=$self->tail_parent();
+ if($self->is($TYPE_ARTIST, $artist))
+ {
+ # should always happen
+ $artist_id=$artist->id();
+ }
+ return $self->album_tracks($artist_id, $tail->id());
+ }
+ my $sql=$self->sql_start("files.name");
+ $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
+ if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
+ {
+ $sql .= "WHERE artists.name =''\n";
+ }
+ $sql .= "GROUP BY files.name;";
+ print "TRACKS SQL($self->{path}): $sql\n" if($self->{verbose});
+ my @names=$self->{db}->cmd_firstcol($sql);
+ print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
+ return(@names);
+}
+
+sub filename
+{
+ my($self, $mountpoint)=@_;
+ my $tail=$self->tail();
+ if($self->is($TYPE_FILE, $tail))
+ {
+ my $id=$tail->id();
+ my $sql=("SELECT paths.name, files.name FROM files\n" .
+ "INNER JOIN paths ON files.paths_id=paths.id\n" .
+ "WHERE files.id=?\n" .
+ "GROUP BY paths.name, files.name");
+ print "FILENAME SQL: $sql\n" if($self->{verbose});
+ my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
+ return($self->{db}->relativise($path, $name, $mountpoint, $self->{path}));
+ }
+ # should never happen
+ return "ERROR";
+}
+
+sub tags_subselect
+{
+ my($self)=@_;
+ my $hasvals=$self->expecting_values();
+ my $tree=$self->{tagtree};
+# use Data::Dumper;
+# print Dumper $tree;
+ my ($sqlclause, @joins)=$tree->to_sql($hasvals) if($tree);
+ my $sql="\tSELECT fxt1.files_id FROM tags t1";
+ my @crosses=();
+ my @inners=();
+ @joins=@{$self->{joins}};
+ for(my $i=0; $i <= $#joins; $i++)
+ {
+ my $cnt=$i+1;
+ my $join=$joins[$i];
+ my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
+ "t${cnt}.id=fxt${cnt}.tags_id");
+ if($i > 0)
+ {
+ push(@crosses, "CROSS JOIN tags t$cnt");
+ $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
+ }
+ push(@inners, $inner);
+ }
+ $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
+ $sql .= ("\n" . join("\n", @inners)) if(@inners);
+ $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
+ $sql .= "\n\tGROUP BY fxt1.files_id\n";
+ return $sql;
+}
+
+sub sql_start
+{
+ my($self, $tables)=@_;
+ my $sql="SELECT $tables FROM ";
+ if($self->{in_all})
+ {
+ $sql .= "files\n";
+ }
+ else
+ {
+ $sql .= ("(\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n");
+ }
+ return $sql;
+}
+
+# we just filter $ALLTRACKS, $NOARTIST and $NOALBUM
+# filtering tags properly requires up to four levels of recursion
+# (tag/tagval/AND/NOT) and is too slow
+sub filter
+{
+ my($self, @dirs)=@_;
+ return(@dirs) unless($ENABLE_FILTER);
+ my $base=$self->{path};
+ my @outdirs=();
+ for my $dir (@dirs)
+ {
+ push(@outdirs, $dir) unless($self->empty("$base/$dir"));
+ }
+ return(@outdirs);
+}
+
+sub empty
+{
+ my($self, $dir)=@_;
+ my $path=ID3FS::Path->new($self->{db}, $dir, $self->{verbose},
+ ($self->{maxtagdepth} - $self->{curtagdepth}));
+ return 1 unless($path->isvalid());
+ my($subdirs,$subfiles)=$path->dirents();
+ return 0 if(@$subfiles || @$subdirs);
+ return 1;
+}
+
+# if path is .../OR/ or .../OR/NOT or .../AND/NOT
+sub want_all_tags
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ return 0 unless($tail);
+ my $parent=$self->tail_parent();
+ my $parent_valid = ($parent && $parent->type() == $TYPE_BOOL);
+ if($tail->type() == $TYPE_BOOL)
+ {
+ return 1 if($tail->name() eq "OR");
+ return 0 unless($tail->name() eq "NOT");
+ return 0 unless($parent_valid);
+ return 1 if($parent->name() eq "OR");
+ return 1 if($parent->name() eq "AND");
+ }
+ elsif($tail->type() == $TYPE_TAG)
+ {
+ return 0 unless($parent_valid);
+ return 1 if($parent->name() eq "NOT");
+ }
+ return 0;
+}
+
1;
projects / id3fs.git / blobdiff