+ my($self, @constraints)=@_;
+ if(!@constraints) # /
+ {
+ # FIXME: add ALL?
+ my $sql="SELECT DISTINCT name FROM tags;";
+ my $tags=$self->cmd_rows($sql);
+ return(map { $_->[0]; } @$tags);
+ }
+ my @ids=();
+
+ my $main_sql_start=("SELECT t2.name\n" .
+ "\tFROM (\n" .
+ $self->tags_subselect(@constraints) .
+ ") AS subselect\n" .
+ "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
+ "INNER JOIN tags t2 ON files_x_tags.tags_id=t2.id\n" .
+ "WHERE t2.id NOT IN (");
+ my $main_sql_end=")\nGROUP BY t2.name;";
+ # FIXME: generalise more?
+
+ while(my $constraint=shift @constraints)
+ {
+ my $cid=$constraint->{id};
+ push(@ids, $cid);
+ }
+ @ids = map( { "\"$_\""; } grep { defined; } @ids) unless($self->{postgres});
+ my $tagstr=join(", ", @ids);
+ my $sql = ($main_sql_start . $tagstr .
+ $main_sql_end);
+ print "SQL: $sql\n";
+ my $result=$self->cmd_rows($sql);
+ my @tagnames=map { $_->[0]; } @$result;
+ print "SUBNAMES: ", join(', ', @tagnames), "\n";
+ return(@tagnames);
+}
+
+sub tag_values
+{
+ my($self, $tagid)=@_;
+ my $sql=("SELECT DISTINCT tagvals.name FROM tagvals\n" .
+ "INNER JOIN tags_x_tagvals ON tagvals.id=tags_x_tagvals.tagvals_id\n" .
+ "WHERE tags_x_tagvals.tags_id=?");
+ my $tags=$self->cmd_rows($sql, $tagid);
+ my @tags=map { $_->[0]; } @$tags;
+ @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
+ return @tags;
+}
+
+sub artists
+{
+ my($self, @constraints)=@_;
+ if(!@constraints) # /ALL
+ {
+ my $sql="SELECT DISTINCT name FROM artists;";
+ my $tags=$self->cmd_rows($sql);
+ return(map { $_->[0]; } @$tags);
+ }
+ my @ids=();
+ my $sql=("SELECT artists.name FROM (\n" .
+ $self->tags_subselect(@constraints) .
+ ") AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN artists ON files.artists_id=artists.id\n" .
+ "GROUP BY artists.name;");
+ print "SQL: $sql\n";
+ my $result=$self->cmd_rows($sql);
+ my @tagnames=map { $_->[0]; } @$result;
+ print "ARTISTS: ", join(', ', @tagnames), "\n";
+ return(@tagnames);
+}
+
+sub albums
+{
+ my($self, @constraints)=@_;
+ my @ids=();
+ # FIXME: rework PathElements
+ if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Artist")
+ {
+ return $self->artist_albums($constraints[$#constraints]->{id}, @constraints);
+ }
+ my $sql=("SELECT albums.name\n" .
+ "\tFROM (\n" .
+ $self->tags_subselect(@constraints) .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN albums ON files.albums_id=albums.id\n" .
+ "GROUP BY albums.name;");
+ my $result=$self->cmd_rows($sql);
+ my @names=map { $_->[0]; } @$result;
+ print "ALBUMS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub artist_albums
+{
+ my($self, $artist_id, @constraints)=@_;
+ my $sql=("SELECT albums.name FROM (\n" .
+ $self->tags_subselect(@constraints) .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n\t" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
+ "WHERE artists.id=? and albums.name <> ''\n\t" .
+ "GROUP BY albums.name\n");
+ print "ARTIST_ALBUMS SQL: $sql\n";
+ my $result=$self->cmd_rows($sql, $artist_id);
+ my @albums=map { $_->[0]; } @$result;
+ print "ALBUMS: ", join(', ', @albums), "\n";
+ return(@albums);
+}
+
+sub artist_tracks
+{
+ my($self, $artist_id, @constraints)=@_;
+ my $sql=("SELECT files.name FROM (\n" .
+ $self->tags_subselect(@constraints) .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n\t" .
+ "WHERE artists.id=? AND albums.name=''\n\t" .
+ "GROUP BY files.name\n");
+ print "ARTIST_TRACKS SQL: $sql\n";
+ my $result=$self->cmd_rows($sql, $artist_id);
+ my @names=map { $_->[0]; } @$result;
+ print "ARTISTTRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub album_tracks
+{
+ my($self, $artist_id, $album_id)=@_;
+ my $sql=("SELECT files.name FROM files\n\t" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n\t" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
+ "WHERE artists.id=? AND albums.id=?\n\t" .
+ "GROUP BY files.name\n");
+ print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
+ my $result=$self->cmd_rows($sql, $artist_id, $album_id);
+ my @names=map { $_->[0]; } @$result;
+ print "TRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub tracks
+{
+ my($self, @constraints)=@_;
+ # FIXME: rework PathElements
+ if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Artist")
+ {
+ return $self->artist_tracks($constraints[$#constraints]->{id}, @constraints);
+ }
+ elsif(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Album")
+ {
+ my $artist_id=0;
+ my $artist=$constraints[($#constraints)-1];
+ if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
+ {
+ # should always happen
+ $artist_id=$artist->{id};
+ }
+ return $self->album_tracks($artist_id, $constraints[$#constraints]->{id});
+ }
+
+ my $sql=("SELECT files.name\n" .
+ "\tFROM (\n" .
+ $self->tags_subselect(@constraints) .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON files.id=subselect.files_id\n" .
+ "GROUP BY files.name;");
+ print "SQL: $sql\n";
+ my $result=$self->cmd_rows($sql);
+ my @names=map { $_->[0]; } @$result;
+ print "TRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub filename
+{
+ my($self, $mountpoint, @constraints)=@_;
+ if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::File")
+ {
+ my $id=$constraints[$#constraints]->{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: $sql\n";
+ my ($path, $name)=$self->cmd_onerow($sql, $id);
+ my $id3fs_path=join('/', map { $_->{name}; } @constraints);
+ return($self->relativise($path, $name, $mountpoint, $id3fs_path));
+ }
+ die("DB::filename: unhandled case\n"); #FIXME
+}
+
+sub tags_subselect
+{
+ my($self,@constraints)=@_;
+ use Data::Dumper;
+ my @tags=();
+ my @tags_vals=();
+ my $lasttag='';
+# print "CONSTRAINTS: \n", Dumper \@constraints;
+ for my $constraint (@constraints)
+ {
+# print ref($constraint),"\n";
+ if(ref($constraint) eq "ID3FS::PathElement::Tag")
+ {
+ if($self->tag_has_values($constraint->{id}))
+ {
+# print "HASVALUES\n";
+ $lasttag=$constraint->{id} if defined($constraint->{id});
+ }
+ else
+ {
+# print "NOVALUES\n";
+ push(@tags, $constraint->{id}) if(defined($constraint->{id}));
+ }
+ }
+ elsif(ref($constraint) eq "ID3FS::PathElement::Tagval")
+ {
+# print "TAGVAL\n";
+ push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
+ }
+ }
+ unless($self->{postgres})
+ {
+ @tags=map{ "\"$_\""; } @tags;
+ @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
+ }
+# print "TAGS\n", Dumper \@tags;
+# print "\nVALS\n", Dumper(\@tags_vals), "\n";
+ my $sql=("\tSELECT files_id FROM tags t1\n" .
+ "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n" .
+ "\tINNER JOIN tags_x_tagvals ON t1.id=tags_x_tagvals.tags_id\n");
+ my @clauses=();
+ if(@tags)
+ {
+ push(@clauses, "(t1.id IN ( " . join(', ', @tags) ." ) )");
+ }
+ for my $pair (@tags_vals)
+ {
+ my($tag, $val)=@$pair;
+ push(@clauses, "( t1.id=$tag AND tags_x_tagvals.tagvals_id=$val )");
+ }
+ if(@clauses)
+ {
+ $sql .= "\tWHERE\n\t\t" . join("\n\t\tOR ", @clauses) . "\n";
+ }
+ return $sql;
+}
+
+
+sub relativise
+{
+ my($self, $path, $name, $mountpoint, $id3fs_path)=@_;
+ $id3fs_path=~s/(.*)\/.*/$1/;
+ my $rpath="$self->{absbase}/$path";
+ my $vpath="$mountpoint/$id3fs_path";
+ my @path=split(/\//,$rpath);
+ my @rel=split(/\//,$vpath);
+ #absolute paths have empty first element due to leading /
+ shift(@path) if($path[0] eq "");
+ shift(@rel) if($rel[0] eq "");
+ if($path[0] ne $rel[0])
+ {
+ #no path in common, return absolute
+ print "FAIL: NO PATHS IN COMMON\n";
+ return $name;
+ }
+ # f: /home/foo/bar/baz.mp3
+ # r: /home/ianb/music/albums
+ while(@path && @rel && ($path[0] eq $rel[0]))
+ {
+ shift(@path);
+ shift(@rel);
+ print "POP ";
+ }
+ print "\n";
+ my $upcount=scalar(@rel);
+ my $result="../" x $upcount;
+ $result .= join("/",@path);
+ $result .= "/$name";
+ return $result;
+}
+
+sub bare_tags
+{
+ my($self)=@_;
+ my $sql=("SELECT tags.name FROM tags\n" .
+ "LEFT JOIN tags_x_tagvals ON tags.id=tags_x_tagvals.tags_id\n" .
+ "WHERE tags_x_tagvals.tags_id IS NULL\n" .
+ "GROUP BY tags.name\n");
+ my $result=$self->cmd_rows($sql);
+ my @names=map { $_->[0]; } @$result;
+ return (@names);
+}
+
+sub tags_with_values
+{
+ my($self)=@_;
+ my $sql=("SELECT tags.name, tagvals.name FROM tags\n" .
+ "INNER JOIN tags_x_tagvals ON tags.id=tags_x_tagvals.tags_id\n" .
+ "INNER JOIN tagvals ON tagvals.id=tags_x_tagvals.tagvals_id\n" .
+ "GROUP BY tags.name, tagvals.name\n");
+ my $result=$self->cmd_rows($sql);
+ my $tags={};
+ for my $pair (@$result)
+ {
+ push(@{$tags->{$pair->[0]}}, $pair->[1]);
+ }
+ return $tags;
+}
+
+sub id
+{
+ my($self, $type, $val)=@_;
+ my $sql="SELECT id FROM $type WHERE name=?";
+ my ($id)=$self->cmd_onerow($sql, $val);
+ return($id);