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;
33 $self->{verbose}=shift;
34 $self->{maxtagdepth}=shift;
35 $self->{curtagdepth}=0;
36 $self->{path} =~ s/\/\//\//g; # drop doubled slashes
39 # print "STATE: ", $self->state(), "\n";
46 if(($self->state() == $STATE_FILE) ||
47 ($self->state() == $STATE_INVALID))
57 return($self->state() == $STATE_FILE);
63 return($self->state() != $STATE_INVALID);
68 my($self, $mountpoint)=@_;
69 if($self->state() == $STATE_FILE)
71 return $self->filename($mountpoint);
73 return "ERROR"; #should never happen?
81 my $state=$self->state();
82 # print "DIRENTS: STATE: $state\n";
83 # print "DIRENTS: FILE: $self->{path}\n";
84 if($state==$STATE_ALL)
86 @dents=($PATH_ALLTRACKS, $PATH_NOARTIST, $self->artists());
88 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
90 my $tag=$self->tail();
91 if($state==$STATE_TAG &&
93 ref($tag) eq "ID3FS::PathElement::Tag" &&
94 $self->{db}->tag_has_values($tag->{id}))
100 if($self->{maxtagdepth} && ($self->{curtagdepth} < $self->{maxtagdepth}))
104 push(@dents, $self->filter($PATH_ALLTRACKS, $PATH_NOARTIST));
105 push(@dents, $self->artists());
108 elsif($state==$STATE_BOOLEAN)
110 my $parent=$self->tail();
111 unless(defined($parent) &&
112 ref($parent) eq "ID3FS::PathElement::Boolean" &&
113 $parent->{name} eq "NOT")
117 push(@dents,$self->tags());
119 elsif($state==$STATE_ROOT)
121 @dents=(qw(ALL NOT), $self->tags());
123 elsif($state==$STATE_ALBUMS)
125 @dents=($self->filter($PATH_ALLTRACKS, $PATH_NOALBUM), $self->albums());
127 elsif($state==$STATE_TRACKLIST)
129 @fents=$self->tracks();
133 print "DIRENTS: UNHANDLED STATE: $state\n";
135 return(\@dents, \@fents);
141 @{$self->{components}}=split(/\//, $self->{path});
142 shift @{$self->{components}}; # drop empty field before leading /
143 # print "PATH: $self->{path}\n";
144 $self->state($STATE_ROOT);
145 return if($self->{path} eq "/");
146 my @parts=@{$self->{components}};
148 $self->{elements}=[];
153 while(defined(my $name=shift @parts))
155 # print "NAME: $name\n";
156 my $state=$self->state();
157 if($state==$STATE_INVALID)
159 # print "SM: INVALID: $name\n";
162 elsif($state==$STATE_ROOT)
164 # print "SM: ROOT: $name\n";
168 $self->state($STATE_ALL);
170 elsif($name eq "NOT")
173 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
174 $self->state($STATE_BOOLEAN);
178 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
181 push(@{$self->{elements}}, $tag);
183 $self->state($STATE_TAG);
187 $self->state($STATE_INVALID);
191 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
193 # print "SM: TAG/TAGVAL($state): $name\n";
194 my $tag=$self->tail();
195 if($state==$STATE_TAG &&
197 ref($tag) eq "ID3FS::PathElement::Tag" &&
198 $self->{db}->tag_has_values($tag->{id}))
200 # print "Parsing: parent: $tag->{id}\n";
201 my $tagval=ID3FS::PathElement::Tag->new($self->{db}, $name, $tag->{id});
204 $self->state($STATE_TAGVAL);
206 push(@{$self->{elements}}, $tagval);
210 $self->state($STATE_INVALID);
213 elsif($name eq $PATH_ALLTRACKS)
215 $self->state($STATE_TRACKLIST);
217 elsif($name eq $PATH_NOARTIST)
219 $self->state($STATE_TRACKLIST);
221 elsif($name eq "AND")
223 $self->state($STATE_BOOLEAN);
224 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
228 $self->state($STATE_BOOLEAN);
229 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
233 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
236 push(@{$self->{elements}}, $artist);
237 $self->state($STATE_ALBUMS);
241 $self->state($STATE_INVALID);
245 elsif($state==$STATE_BOOLEAN)
247 # print "SM: BOOLEAN: $name\n";
248 my $parent=$self->tail();
250 if(defined($parent) &&
251 ref($parent) eq "ID3FS::PathElement::Boolean" &&
252 $parent->{name} eq "NOT")
256 if($allownot && $name eq "NOT")
258 $self->state($STATE_BOOLEAN);
259 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
263 my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
266 push(@{$self->{elements}}, $tag);
268 $self->state($STATE_TAG);
272 $self->state($STATE_INVALID);
276 elsif($state==$STATE_ALBUMS)
278 # print "SM: ALBUM: $name\n";
279 if($name eq $PATH_ALLTRACKS)
281 $self->state($STATE_TRACKLIST);
283 elsif($name eq $PATH_NOALBUM)
285 $self->state($STATE_TRACKLIST);
289 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
292 push(@{$self->{elements}}, $album);
293 $self->state($STATE_TRACKLIST);
297 $self->state($STATE_INVALID);
301 elsif($state==$STATE_TRACKLIST)
303 # print "SM: TRACKLIST: $name\n";
304 my $track=ID3FS::PathElement::File->new($self->{db}, $name);
307 push(@{$self->{elements}}, $track);
308 $self->state($STATE_FILE);
312 $self->state($STATE_INVALID);
315 elsif($state==$STATE_FILE)
317 # print "SM: FILE: $name\n";
318 # Can't have anything after a filename
319 $self->state($STATE_INVALID);
321 elsif($state==$STATE_ALL)
323 if($name eq $PATH_ALLTRACKS)
325 $self->state($STATE_TRACKLIST);
327 elsif($name eq $PATH_NOARTIST)
330 $self->state($STATE_TRACKLIST);
334 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
337 push(@{$self->{elements}}, $artist);
338 $self->state($STATE_ALBUMS);
342 $self->state($STATE_INVALID);
348 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
349 $self->state($STATE_INVALID);
353 if($root_not && ($tags_seen < 2))
358 # remove trailing boolean
359 my @elements=@{$self->{elements}};
360 while(@elements && ref($elements[$#elements]) eq "ID3FS::PathElement::Boolean")
364 # sort elements by precedence
365 @elements=$self->sort_elements(@elements);
366 $self->{tagtree}=$self->elements_to_tree(\@elements);
369 ($self->{sqlconditions},
370 $self->{joins}) = $self->{tagtree}->to_sql();
371 # print "TREE: ", $self->{tagtree}->print(), "\n";
372 # print("SQL CONDITION(", scalar(@{$self->{joins}}), "): ",
373 # $self->{sqlconditions}, "\n");
375 # print Dumper $self->{tagtree};
381 my($self, $newstate)=@_;
382 if(defined($newstate))
384 $self->{state}=$newstate;
385 $self->{curtagdepth}++ if($newstate == $STATE_TAG);
387 return $self->{state};
392 my($self, $elements)=@_;
393 return undef unless(@$elements);
394 my ($left, $right, $op)=(undef, undef, undef);
395 my $thing=pop @$elements;
396 if(ref($thing) eq "ID3FS::PathElement::Boolean")
399 $right=$self->elements_to_tree($elements);
400 if($op->{name} ne "NOT")
402 $left=$self->elements_to_tree($elements);
404 return ID3FS::Path::Node->new($left, $op, $right);
408 return ID3FS::Path::Node->new($thing);
412 # Dijkstra's shunting-yard algorithm
415 my ($self, @input)=@_;
418 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
419 while(my $thing = shift @input)
421 if(ref($thing) eq "ID3FS::PathElement::Tag")
423 # Handle tag values by dropping parent
424 if(@input && ref($input[0]) eq "ID3FS::PathElement::Tag")
428 push(@output, $thing);
430 elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
434 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
436 push(@output, pop(@opstack));
438 push(@opstack, $thing);
443 push(@output, pop(@opstack));
445 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
452 return() unless(defined($self->{tagtree}));
453 return($self->{tagtree}->used_tags());
459 my $tail=$self->tail();
460 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
462 return($self->{db}->tag_has_values($tail->{id}));
469 my $tail=$self->tail();
470 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
477 sub trailing_tag_parent
480 my $tail=$self->tail();
481 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
483 return($tail->{parents_id});
491 return($self->{elements}->[$#{$self->{elements}}]);
494 # the one before last
498 return($self->{elements}->[($#{$self->{elements}}) - 1]);
501 ######################################################################
506 if(!$self->{tagtree}) # / or /NOT
508 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
509 return($self->{db}->cmd_firstcol($sql));
511 my $hasvals=$self->expecting_values();
512 my $parent=$self->trailing_tag_parent();
513 # print "THASVALS: $hasvals\n";
514 # print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
516 my $sql=("SELECT tags.name FROM (\n" .
517 $self->tags_subselect() .
519 "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
520 "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
521 my @allused=$self->used_tags();
522 my @used=grep { ref($_) ne "ARRAY"; } @allused;
523 my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
524 # print "tags(): USED: ", join(", ", @used), "\n";
525 # print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
528 my $id=$self->trailing_tag_id();
531 # print "HAS_VALUES\n";
532 my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
533 my $clause="(tags.parents_id='$id'";
536 $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
539 push(@andclauses, $clause);
543 # print "HASNT VALUES\n";;
546 push(@andclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
548 for my $pair (@used_with_vals)
550 push(@andclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
554 my $parentclause= "(tags.parents_id='";
557 $parentclause .= $id;
561 $parentclause .= $parent;
563 $parentclause .= "')";
564 push(@andclauses, $parentclause);
568 push(@andclauses, '( ' . join(' OR ', @orclauses) . ' )');
572 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
574 $sql .= "GROUP BY tags.name;";
575 print "SQL(TAGS): $sql\n" if($self->{verbose});
576 my @tagnames=$self->{db}->cmd_firstcol($sql);
577 print("SUBNAMES: ", join(', ', @tagnames), "\n") if($self->{verbose});
584 if(!@{$self->{elements}}) # /ALL
586 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
587 return($self->{db}->cmd_firstcol($sql));
590 my $sql=$self->sql_start("artists.name");
591 $sql .= ("INNER JOIN artists ON files.artists_id=artists.id\n" .
592 "WHERE artists.name != ''\n" .
593 "GROUP BY artists.name;");
594 print "SQL(ARTISTS): $sql\n" if($self->{verbose});
595 my @tagnames=$self->{db}->cmd_firstcol($sql);
596 print("ARTISTS: ", join(', ', @tagnames), "\n") if($self->{verbose});
604 my $tail=$self->tail();
605 # FIXME: rework PathElements
606 if(ref($tail) eq "ID3FS::PathElement::Artist")
608 return $self->artist_albums($tail->{id});
610 my $sql=$self->sql_start("albums.name");
611 $sql .= ("INNER JOIN albums ON files.albums_id=albums.id\n" .
612 "WHERE albums.name != ''\n" .
613 "GROUP BY albums.name;");
614 print "SQL(ALBUMS): \n$sql\n" if($self->{verbose});
615 my @names=$self->{db}->cmd_firstcol($sql);
616 print("ALBUMS: ", join(', ', @names), "\n") if($self->{verbose});
622 my($self, $artist_id)=@_;
623 my $sql=$self->sql_start("albums.name");
624 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
625 "INNER JOIN artists ON artists.id=files.artists_id\n" .
626 "WHERE artists.id=? and albums.name <> ''\n" .
627 "GROUP BY albums.name\n");
628 print "ARTIST_ALBUMS SQL: $sql\n" if($self->{verbose});
629 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
630 print("ALBUMS: ", join(', ', @albums), "\n") if($self->{verbose});
636 my($self, $artist_id)=@_;
637 my $sql=$self->sql_start("files.name");
638 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
639 "INNER JOIN albums ON albums.id=files.albums_id\n" .
640 "WHERE artists.id=? AND albums.name=''\n" .
641 "GROUP BY files.name\n");
642 print "ARTIST_TRACKS SQL: $sql\n" if($self->{verbose});
643 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
644 print("ARTISTTRACKS: ", join(', ', @names), "\n") if($self->{verbose});
650 my($self, $artist_id, $album_id)=@_;
651 my $sql=("SELECT files.name FROM files\n" .
652 "INNER JOIN albums ON albums.id=files.albums_id\n" .
653 "INNER JOIN artists ON artists.id=files.artists_id\n" .
654 "WHERE artists.id=? AND albums.id=?\n" .
655 "GROUP BY files.name\n");
656 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n" if($self->{verbose});
657 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
658 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
665 # FIXME: rework PathElements
666 my $tail=$self->tail();
667 if(ref($tail) eq "ID3FS::PathElement::Artist")
669 return $self->artist_tracks($tail->{id});
671 elsif(ref($tail) eq "ID3FS::PathElement::Album")
674 my $artist=$self->tail_parent();
675 if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
677 # should always happen
678 $artist_id=$artist->{id};
680 return $self->album_tracks($artist_id, $tail->{id});
682 my $sql=$self->sql_start("files.name");
683 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
684 if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
686 $sql .= "WHERE artists.name =''\n";
688 $sql .= "GROUP BY files.name;";
689 print "TRACKS SQL($self->{path}): $sql\n" if($self->{verbose});
690 my @names=$self->{db}->cmd_firstcol($sql);
691 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
697 my($self, $mountpoint)=@_;
698 my $tail=$self->tail();
699 if(ref($tail) eq "ID3FS::PathElement::File")
702 my $sql=("SELECT paths.name, files.name FROM files\n" .
703 "INNER JOIN paths ON files.paths_id=paths.id\n" .
704 "WHERE files.id=?\n" .
705 "GROUP BY paths.name, files.name");
706 print "FILENAME SQL: $sql\n" if($self->{verbose});
707 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
708 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
709 return($self->{db}->relativise($path, $name, $mountpoint));
711 die("DB::filename: unhandled case\n"); #FIXME
717 my $hasvals=$self->expecting_values();
718 # we need to specially handle a bare /NOT/tag with no other clauses,
719 # using a simple WHERE id !='tagid' instead of a LEFT JOIN
720 if($self->{bare_not})
722 return $self->bare_not_subselect();
726 return "\tSELECT id FROM files AS files_id\n";
728 my $tree=$self->{tagtree};
729 my $parent=$self->trailing_tag_parent();
731 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
732 # print "TREE: ", $tree->print(), "\n";
736 $tag=$self->trailing_tag_id();
737 # print "Trailing id: $tag\n";
739 my ($sqlclause, @joins)=(undef, ());
740 ($sqlclause, @joins) = $tree->to_sql($hasvals) if($tree);
741 # print "SQL(" . scalar(@joins) .": $sqlclause\n";
742 my $sql="\tSELECT fxt1.files_id FROM tags t1";
745 # $joinsneeded++ if($tag);
746 for(my $i=0; $i <= $#joins; $i++)
750 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
751 "t${cnt}.id=fxt${cnt}.tags_id");
754 push(@crosses, "CROSS JOIN tags t$cnt");
755 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
757 push(@inners, $inner);
759 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
760 $sql .= ("\n" . join("\n", @inners)) if(@inners);
761 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
764 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
766 $sql .= "\n\tGROUP BY fxt1.files_id\n";
770 sub bare_not_subselect
773 my @tags=grep { ref($_) eq "ID3FS::PathElement::Tag"; } @{$self->{elements}};
774 my $sql=("\tSELECT f1.id AS files_id FROM files f1 WHERE f1.id NOT IN (\n" .
775 "\t\tSELECT fxt1.files_id FROM tags t1\n" .
776 "\t\tINNER JOIN files_x_tags fxt1 ON t1.id=fxt1.tags_id\n" .
778 if(scalar(@tags) > 1)
780 $sql .= ("(t1.parents_id='" . $tags[0]->{id} . "' AND t1.id='" .
781 $tags[1]->{id} . "')");
785 $sql .= ("(t1.parents_id='' AND t1.id='" . $tags[0]->{id} . "')");
787 $sql .= "\n\t\tGROUP BY fxt1.files_id\n\t)\n";
793 my($self, $tables)=@_;
794 my $sql="SELECT $tables FROM ";
802 $self->tags_subselect() .
804 "INNER JOIN files ON subselect.files_id=files.id\n");
810 sub constraints_tag_list
812 my($self, @constraints)=@_;
816 for my $constraint (@constraints)
818 # print ref($constraint), ": ", $constraint->{name}, "\n";
819 if(ref($constraint) eq "ID3FS::PathElement::Tag")
821 if(defined($lasttag))
824 push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
827 elsif($self->tag_has_values($constraint->{id}))
829 # print "HASVALUES\n";
830 $lasttag=$constraint->{id} if defined($constraint->{id});
834 # print "NOVALUES\n";
835 push(@tags, $constraint->{id}) if(defined($constraint->{id}));
839 @tags=map{ "\"$_\""; } @tags;
840 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
841 $lasttag="\"$lasttag\"" if defined($lasttag);
842 return(\@tags, \@tags_vals, $lasttag);
845 # we just filter $ALLTRACKS, $NOARTIST and $NOALBUM
846 # filtering tags properly requires up to four levels of recursion
847 # (tag/tagval/AND/NOT) and is too slow
851 my $base=$self->{path};
855 print "\nFILTER (",$self->state(), "): $base / $dir\n";
856 if($self->empty("$base/$dir"))
858 print "empty: $base / $dir\n";
862 print "non-empty, accepting: $base / $dir\n";
863 push(@outdirs, $dir);
872 my $path=ID3FS::Path->new($self->{db}, $dir, $self->{verbose},
873 ($self->{maxtagdepth} - $self->{curtagdepth}));
874 return 1 unless($path->isvalid());
875 my($subdirs,$subfiles)=$path->dirents();
876 return 0 if(@$subfiles || @$subdirs);