5 use ID3FS::PathElement::Artist;
6 use ID3FS::PathElement::Album;
7 use ID3FS::PathElement::Boolean;
8 use ID3FS::PathElement::File;
9 use ID3FS::PathElement::Tag;
10 use ID3FS::PathElement::Tagval;
11 use ID3FS::Path::Node;
13 our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
14 $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
15 $STATE_FILE, $STATE_ALL)=(0..8);
17 our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
19 our $PATH_ALLTRACKS="TRACKS";
20 our $PATH_NOARTIST="NOARTIST";
21 our $PATH_NOALBUM="NOALBUM";
26 my $class=ref($proto) || $proto;
34 # print "STATE: ", $self->state(), "\n";
41 if(($self->state() == $STATE_FILE) ||
42 ($self->state() == $STATE_INVALID))
52 return 1 if($self->state() == $STATE_FILE);
59 return($self->state() != $STATE_INVALID);
64 my($self, $mountpoint)=@_;
65 if($self->state() == $STATE_FILE)
67 return $self->filename($mountpoint, $self);
69 return "ERROR"; #should never happen?
77 my $state=$self->state();
78 # print "DIRENTS: STATE: $state\n";
79 # print "DIRENTS: FILE: $self->{path}\n";
80 if($state==$STATE_ALL)
82 push(@dents, $PATH_ALLTRACKS, $PATH_NOARTIST, $self->artists());
84 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
86 my $tag=$self->tail();
87 if($state==$STATE_TAG &&
89 ref($tag) eq "ID3FS::PathElement::Tag" &&
90 $self->{db}->tag_has_values($tag->{id}))
96 push(@dents, qw(AND OR), $PATH_ALLTRACKS, $PATH_NOARTIST, $self->artists());
99 elsif($state==$STATE_BOOLEAN)
101 my $parent=$self->tail();
102 unless(defined($parent) &&
103 ref($parent) eq "ID3FS::PathElement::Boolean" &&
104 $parent->{name} eq "NOT")
108 push(@dents, $self->tags());
110 elsif($state==$STATE_ROOT)
112 @dents=(qw(ALL NOT), $self->tags());
114 elsif($state==$STATE_ALBUMS)
116 @dents=($PATH_ALLTRACKS, $PATH_NOALBUM, $self->albums());
118 elsif($state==$STATE_TRACKLIST)
120 @fents=$self->tracks();
124 print "DIRENTS: UNHANDLED STATE: $state\n";
126 return(\@dents, \@fents);
132 @{$self->{components}}=split(/\//, $self->{path});
133 shift @{$self->{components}}; # drop empty field before leading /
134 # print "PATH: $self->{path}\n";
135 $self->state($STATE_ROOT);
136 return if($self->{path} eq "/");
137 my @parts=@{$self->{components}};
139 $self->{elements}=[];
144 while(defined(my $name=shift @parts))
146 # print "NAME: $name\n";
147 my $state=$self->state();
148 if($state==$STATE_INVALID)
150 # print "SM: INVALID: $name\n";
153 elsif($state==$STATE_ROOT)
155 # print "SM: ROOT: $name\n";
159 $self->state($STATE_ALL);
161 elsif($name eq "NOT")
164 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
165 $self->state($STATE_BOOLEAN);
169 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
172 push(@{$self->{elements}}, $tag);
174 $self->state($STATE_TAG);
178 $self->state($STATE_INVALID);
182 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
184 # print "SM: TAG/TAGVAL($state): $name\n";
185 my $tag=$self->tail();
186 if($state==$STATE_TAG &&
188 ref($tag) eq "ID3FS::PathElement::Tag" &&
189 $self->{db}->tag_has_values($tag->{id}))
191 # print "Parsing: parent: $tag->{id}\n";
192 my $tagval=ID3FS::PathElement::Tag->new($self->{db}, $name, $tag->{id});
195 $self->state($STATE_TAGVAL);
197 push(@{$self->{elements}}, $tagval);
201 $self->state($STATE_INVALID);
204 elsif($name eq $PATH_ALLTRACKS)
206 $self->state($STATE_TRACKLIST);
208 elsif($name eq $PATH_NOARTIST)
210 $self->state($STATE_TRACKLIST);
212 elsif($name eq "AND")
214 $self->state($STATE_BOOLEAN);
215 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
219 $self->state($STATE_BOOLEAN);
220 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
224 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
227 push(@{$self->{elements}}, $artist);
228 $self->state($STATE_ALBUMS);
232 $self->state($STATE_INVALID);
236 elsif($state==$STATE_BOOLEAN)
238 # print "SM: BOOLEAN: $name\n";
239 my $parent=$self->tail();
241 if(defined($parent) &&
242 ref($parent) eq "ID3FS::PathElement::Boolean" &&
243 $parent->{name} eq "NOT")
247 if($allownot && $name eq "NOT")
249 $self->state($STATE_BOOLEAN);
250 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
254 my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
257 push(@{$self->{elements}}, $tag);
259 $self->state($STATE_TAG);
263 $self->state($STATE_INVALID);
267 elsif($state==$STATE_ALBUMS)
269 # print "SM: ALBUM: $name\n";
270 if($name eq $PATH_ALLTRACKS)
272 $self->state($STATE_TRACKLIST);
274 elsif($name eq $PATH_NOALBUM)
276 $self->state($STATE_TRACKLIST);
280 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
283 push(@{$self->{elements}}, $album);
284 $self->state($STATE_TRACKLIST);
288 $self->state($STATE_INVALID);
292 elsif($state==$STATE_TRACKLIST)
294 # print "SM: TRACKLIST: $name\n";
295 my $track=ID3FS::PathElement::File->new($self->{db}, $name);
298 push(@{$self->{elements}}, $track);
299 $self->state($STATE_FILE);
303 $self->state($STATE_INVALID);
306 elsif($state==$STATE_FILE)
308 # print "SM: FILE: $name\n";
309 # Can't have anything after a filename
310 $self->state($STATE_INVALID);
312 elsif($state==$STATE_ALL)
314 if($name eq $PATH_ALLTRACKS)
316 $self->state($STATE_TRACKLIST);
318 elsif($name eq $PATH_NOARTIST)
321 $self->state($STATE_TRACKLIST);
325 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
328 push(@{$self->{elements}}, $artist);
329 $self->state($STATE_ALBUMS);
333 $self->state($STATE_INVALID);
339 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
340 $self->state($STATE_INVALID);
344 if($root_not && ($tags_seen < 2))
349 # remove trailing boolean
350 my @elements=@{$self->{elements}};
351 while(@elements && ref($elements[$#elements]) eq "ID3FS::PathElement::Boolean")
355 # sort elements by precedence
356 @elements=$self->sort_elements(@elements);
357 $self->{tagtree}=$self->elements_to_tree(\@elements);
360 ($self->{sqlconditions},
361 $self->{joins}) = $self->{tagtree}->to_sql();
362 # print "TREE: ", $self->{tagtree}->print(), "\n";
363 # print("SQL CONDITION(", scalar(@{$self->{joins}}), "): ",
364 # $self->{sqlconditions}, "\n");
366 # print Dumper $self->{tagtree};
372 my($self, $newstate)=@_;
373 $self->{state}=$newstate if(defined($newstate));
374 return $self->{state};
379 my($self, $elements)=@_;
380 return undef unless(@$elements);
381 my ($left, $right, $op)=(undef, undef, undef);
382 my $thing=pop @$elements;
383 if(ref($thing) eq "ID3FS::PathElement::Boolean")
386 $right=$self->elements_to_tree($elements);
387 if($op->{name} ne "NOT")
389 $left=$self->elements_to_tree($elements);
391 return ID3FS::Path::Node->new($left, $op, $right);
395 return ID3FS::Path::Node->new($thing);
399 # Dijkstra's shunting-yard algorithm
402 my ($self, @input)=@_;
405 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
406 while(my $thing = shift @input)
408 if(ref($thing) eq "ID3FS::PathElement::Tag")
410 # Handle tag values by dropping parent
411 if(@input && ref($input[0]) eq "ID3FS::PathElement::Tag")
415 push(@output, $thing);
417 elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
421 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
423 push(@output, pop(@opstack));
425 push(@opstack, $thing);
430 push(@output, pop(@opstack));
432 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
439 return() unless(defined($self->{tagtree}));
440 return($self->{tagtree}->used_tags());
446 my $tail=$self->tail();
447 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
449 return($self->{db}->tag_has_values($tail->{id}));
456 my $tail=$self->tail();
457 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
464 sub trailing_tag_parent
467 my $tail=$self->tail();
468 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
470 return($tail->{parents_id});
478 return($self->{elements}->[$#{$self->{elements}}]);
481 # the one before last
485 return($self->{elements}->[($#{$self->{elements}}) - 1]);
488 ######################################################################
493 if(!$self->{tagtree}) # / or /NOT # FIXME: /ALL too?
495 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
496 return($self->{db}->cmd_firstcol($sql));
498 my $hasvals=$self->tag_has_values();
499 my $parent=$self->trailing_tag_parent();
500 # print "THASVALS: $hasvals\n";
501 # print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
503 my $sql=("SELECT tags.name FROM (\n" .
504 $self->tags_subselect() .
506 "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
507 "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
508 my @allused=$self->used_tags();
509 my @used=grep { ref($_) ne "ARRAY"; } @allused;
510 my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
511 # print "tags(): USED: ", join(", ", @used), "\n";
512 # print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
515 my $id=$self->trailing_tag_id();
518 # print "HAS_VALUES\n";
519 my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
520 my $clause="(tags.parents_id='$id'";
523 $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
526 push(@andclauses, $clause);
530 # print "HASNT VALUES\n";;
533 push(@andclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
535 for my $pair (@used_with_vals)
537 push(@andclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
541 my $parentclause= "(tags.parents_id='";
544 $parentclause .= $id;
548 $parentclause .= $parent;
550 $parentclause .= "')";
551 push(@andclauses, $parentclause);
555 push(@andclauses, '( ' . join(' OR ', @orclauses) . ' )');
559 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
561 $sql .= "GROUP BY tags.name;";
562 print "SQL(TAGS): $sql\n";
563 my @tagnames=$self->{db}->cmd_firstcol($sql);
564 print "SUBNAMES: ", join(', ', @tagnames), "\n";
570 my($self, $tagid)=@_;
571 my $sql=("SELECT DISTINCT name FROM tags\n" .
572 "WHERE parents_id=?");
573 my @tags=$self->{db}->cmd_firstcol($sql, $tagid);
574 @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
581 if(!@{$self->{elements}}) # /ALL
583 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
584 return($self->{db}->cmd_firstcol($sql));
587 my $sql=("SELECT artists.name FROM (\n" .
588 $self->tags_subselect() .
590 "INNER JOIN files ON subselect.files_id=files.id\n" .
591 "INNER JOIN artists ON files.artists_id=artists.id\n" .
592 "WHERE artists.name != ''\n" .
593 "GROUP BY artists.name;");
594 print "SQL(ARTISTS): $sql\n";
595 my @tagnames=$self->{db}->cmd_firstcol($sql);
596 print "ARTISTS: ", join(', ', @tagnames), "\n";
604 my $tail=$self->tail();
605 # FIXME: rework PathElements
606 if(ref($tail) eq "ID3FS::PathElement::Artist")
608 return $self->artist_albums($tail->{id});
613 $sql="SELECT name FROM albums";
617 $sql=("SELECT albums.name\n" .
619 $self->tags_subselect() .
620 "\t) AS subselect\n" .
621 "INNER JOIN files ON subselect.files_id=files.id\n" .
622 "INNER JOIN albums ON files.albums_id=albums.id\n" .
623 "WHERE albums.name != ''\n" .
624 "GROUP BY albums.name;");
626 print "SQL(ALBUMS): \n$sql\n";
627 my @names=$self->{db}->cmd_firstcol($sql);
628 print "ALBUMS: ", join(', ', @names), "\n";
634 my($self, $artist_id)=@_;
635 my $sql="SELECT albums.name FROM ";
643 $self->tags_subselect() .
645 "INNER JOIN files ON subselect.files_id=files.id\n");
647 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
648 "INNER JOIN artists ON artists.id=files.artists_id\n" .
649 "WHERE artists.id=? and albums.name <> ''\n" .
650 "GROUP BY albums.name\n");
651 print "ARTIST_ALBUMS SQL: $sql\n";
652 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
653 print "ALBUMS: ", join(', ', @albums), "\n";
659 my($self, $artist_id)=@_;
660 my $sql="SELECT files.name FROM ";
668 $self->tags_subselect() .
669 "\t) AS subselect\n" .
670 "INNER JOIN files ON subselect.files_id=files.id\n");
672 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
673 "INNER JOIN albums ON albums.id=files.albums_id\n" .
674 "WHERE artists.id=? AND albums.name=''\n" .
675 "GROUP BY files.name\n");
676 print "ARTIST_TRACKS SQL: $sql\n";
677 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
678 print "ARTISTTRACKS: ", join(', ', @names), "\n";
684 my($self, $artist_id, $album_id)=@_;
685 my $sql=("SELECT files.name FROM files\n" .
686 "INNER JOIN albums ON albums.id=files.albums_id\n" .
687 "INNER JOIN artists ON artists.id=files.artists_id\n" .
688 "WHERE artists.id=? AND albums.id=?\n" .
689 "GROUP BY files.name\n");
690 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
691 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
692 print "TRACKS: ", join(', ', @names), "\n";
699 # FIXME: rework PathElements
700 my $tail=$self->tail();
701 if(ref($tail) eq "ID3FS::PathElement::Artist")
703 return $self->artist_tracks($tail->{id});
705 elsif(ref($tail) eq "ID3FS::PathElement::Album")
708 my $artist=$self->tail_parent();
709 if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
711 # should always happen
712 $artist_id=$artist->{id};
714 return $self->album_tracks($artist_id, $tail->{id});
716 my $sql="SELECT files.name FROM ";
724 $self->tags_subselect() .
726 "INNER JOIN files ON files.id=subselect.files_id\n");
728 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
729 if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
731 $sql .= "WHERE artists.name =''\n";
733 $sql .= "GROUP BY files.name;";
734 print "TRACKS SQL($self->{path}): $sql\n";
735 my @names=$self->{db}->cmd_firstcol($sql);
736 print "TRACKS: ", join(', ', @names), "\n";
742 my($self, $mountpoint)=@_;
743 my $tail=$self->tail();
744 if(ref($tail) eq "ID3FS::PathElement::File")
747 my $sql=("SELECT paths.name, files.name FROM files\n" .
748 "INNER JOIN paths ON files.paths_id=paths.id\n" .
749 "WHERE files.id=?\n" .
750 "GROUP BY paths.name, files.name");
751 print "FILENAME SQL: $sql\n";
752 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
753 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
754 return($self->{db}->relativise($path, $name, $mountpoint, $id3fs_path));
756 die("DB::filename: unhandled case\n"); #FIXME
762 my $hasvals=$self->tag_has_values();
763 # we need to specially handle a bare /NOT/tag with no other clauses,
764 # using a simple WHERE id !='tagid' instead of a LEFT JOIN
765 if($self->{bare_not})
767 return $self->bare_not_subselect();
771 return "\tSELECT id FROM files AS files_id\n";
773 my $tree=$self->{tagtree};
774 my $parent=$self->trailing_tag_parent();
776 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
777 # print "TREE: ", $tree->print(), "\n";
781 $tag=$self->trailing_tag_id();
782 # print "Trailing id: $tag\n";
784 my ($sqlclause, @joins)=(undef, ());
785 ($sqlclause, @joins) = $tree->to_sql($hasvals) if($tree);
786 # print "SQL(" . scalar(@joins) .": $sqlclause\n";
787 my $sql="\tSELECT fxt1.files_id FROM tags t1";
790 # $joinsneeded++ if($tag);
791 for(my $i=0; $i <= $#joins; $i++)
795 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
796 "t${cnt}.id=fxt${cnt}.tags_id");
799 push(@crosses, "CROSS JOIN tags t$cnt");
800 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
802 push(@inners, $inner);
804 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
805 $sql .= ("\n" . join("\n", @inners)) if(@inners);
806 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
809 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
811 $sql .= "\n\tGROUP BY fxt1.files_id\n";
815 sub bare_not_subselect
818 my @tags=grep { ref($_) eq "ID3FS::PathElement::Tag"; } @{$self->{elements}};
819 my $sql=("\tSELECT f1.id AS files_id FROM files f1 WHERE f1.id NOT IN (\n" .
820 "\t\tSELECT fxt1.files_id FROM tags t1\n" .
821 "\t\tINNER JOIN files_x_tags fxt1 ON t1.id=fxt1.tags_id\n" .
823 if(scalar(@tags) > 1)
825 $sql .= ("(t1.parents_id='" . $tags[0]->{id} . "' AND t1.id='" .
826 $tags[1]->{id} . "')");
830 $sql .= ("(t1.parents_id='' AND t1.id='" . $tags[0]->{id} . "')");
832 $sql .= "\n\t\tGROUP BY fxt1.files_id\n\t)\n";
836 sub tags_subselect_and_not
838 my($self,@constraints)=@_;
839 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
841 my @tags_vals=@$tags_vals;;
849 $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
850 push(@andclauses, "\t\tfxt${cnt}.tags_id=$tag");
854 $sql .= ("\tLEFT JOIN files_x_tags fxt$cnt ON fxt" .
855 ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
856 push(@andclauses, "\t\tfxt${cnt}.tags_id IS NULL");
858 print "AND: @andclauses\n";
863 $sql .= "\tWHERE\n\t\t";
864 $sql .= join(" AND\n\t\t", @andclauses) . "\n";
866 $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
871 sub tags_subselect_and
873 my($self,@constraints)=@_;
874 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
876 my @tags_vals=@$tags_vals;;
884 $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
888 $sql .= ("\tINNER JOIN files_x_tags fxt$cnt ON fxt" .
889 ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
891 push(@andclauses, "\t\tfxt${cnt}.tags_id = $tag");
892 print "AND: @andclauses\n";
897 $sql .= "\tWHERE\n\t\t";
898 $sql .= join(" AND\n\t\t", @andclauses) . "\n";
900 $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
904 sub tags_subselect_or
906 my($self,@constraints)=@_;
907 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
909 my @tags_vals=@$tags_vals;;
911 my $sql=("\tSELECT files_x_tags.files_id FROM tags t1\n" .
912 "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n");
918 push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
919 push(@andclauses, "( t1.id IN ( " . join(', ', @tags) ." ) )");
921 for my $pair (@tags_vals)
923 my($tag, $val)=@$pair;
924 push(@orclauses, "( t1.parents_id=$tag AND t1.id=$val )");
926 # push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
929 push(@andclauses, join("\n\t\tOR ", @orclauses));
933 $sql .= "\tWHERE\n\t\t";
934 $sql .= join("\n\t\tAND ", @andclauses) . "\n";
936 $sql .= "\tGROUP BY files_x_tags.files_id\n";
940 sub constraints_tag_list
942 my($self, @constraints)=@_;
946 for my $constraint (@constraints)
948 # print ref($constraint), ": ", $constraint->{name}, "\n";
949 if(ref($constraint) eq "ID3FS::PathElement::Tag")
951 if(defined($lasttag))
954 push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
957 elsif($self->tag_has_values($constraint->{id}))
959 # print "HASVALUES\n";
960 $lasttag=$constraint->{id} if defined($constraint->{id});
964 # print "NOVALUES\n";
965 push(@tags, $constraint->{id}) if(defined($constraint->{id}));
969 unless($self->{db}->{postgres})
971 @tags=map{ "\"$_\""; } @tags;
972 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
973 $lasttag="\"$lasttag\"" if defined($lasttag);
975 return(\@tags, \@tags_vals, $lasttag);
982 my $sql=("SELECT tags.name FROM tags\n" .
983 "WHERE tags.parents_id=''\n" .
984 "GROUP BY tags.name\n");
985 my @names=$self->{db}->cmd_firstcol($sql);
991 # FIXME: only shows one level of tag depth
993 my $sql=("SELECT p.name, t.name FROM tags t\n" .
994 "INNER JOIN tags p ON t.parents_id=p.id\n" .
995 "GROUP BY p.name, t.name\n");
997 my $result=$self->{db}->cmd_rows($sql);
999 for my $pair (@$result)
1001 push(@{$tags->{$pair->[0]}}, $pair->[1]);