7 our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
8 $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
9 $STATE_FILE, $STATE_ALL)=(0..8);
11 our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
13 our $PATH_ALLTRACKS= "TRACKS";
14 our $PATH_NOARTIST = "NOARTIST";
15 our $PATH_NOALBUM = "NOALBUM";
17 our $ENABLE_FILTER = 1;
22 my $class=ref($proto) || $proto;
29 $self->{verbose}=shift;
30 $self->{maxtagdepth}=shift;
31 $self->{curtagdepth}=0;
32 $self->{path} =~ s/\/\//\//g; # drop doubled slashes
35 # print "STATE: ", $self->state(), "\n";
42 if(($self->state() == $STATE_FILE) ||
43 ($self->state() == $STATE_INVALID))
53 return($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);
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==$STATE_ALL)
82 @dents=($self->filter($PATH_ALLTRACKS, $PATH_NOARTIST), $self->artists());
84 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
86 if($state==$STATE_TAG && $self->at("tag") &&
87 $self->{db}->tag_has_values($self->tail()->id()))
93 if($self->{maxtagdepth} && ($self->{curtagdepth} < $self->{maxtagdepth}))
97 push(@dents, $self->filter($PATH_ALLTRACKS, $PATH_NOARTIST), $self->artists());
100 elsif($state==$STATE_BOOLEAN)
102 my $parent=$self->tail();
103 unless($self->is("boolean", $parent) &&
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==$STATE_ALBUMS)
116 @dents=$self->filter($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}=[];
143 while(defined(my $name=shift @parts))
145 # print "NAME: $name\n";
146 my $state=$self->state();
147 if($state==$STATE_INVALID)
149 # print "SM: INVALID: $name\n";
152 elsif($state==$STATE_ROOT)
154 # print "SM: ROOT: $name\n";
158 $self->state($STATE_ALL);
160 elsif($name eq "NOT")
163 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
164 $self->state($STATE_BOOLEAN);
168 $tag=ID3FS::Path::Node->new($self->{db},"tag", $name);
171 push(@{$self->{elements}}, $tag);
173 $self->state($STATE_TAG);
177 $self->state($STATE_INVALID);
181 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
183 my $tag=$self->tail();
184 # print "SM: TAG/TAGVAL($state): $name\n";
185 if($state==$STATE_TAG && $self->is("tag", $tag) &&
186 $self->{db}->tag_has_values($tag->id()))
188 # print "Parsing: parent: $tag->id()\n";
189 my $tagval=ID3FS::Path::Node->new($self->{db}, "tag", $name, $tag->id());
192 $self->state($STATE_TAGVAL);
194 push(@{$self->{elements}}, $tagval);
198 $self->state($STATE_INVALID);
201 elsif($name eq $PATH_ALLTRACKS)
203 $self->state($STATE_TRACKLIST);
205 elsif($name eq $PATH_NOARTIST)
207 $self->state($STATE_TRACKLIST);
209 elsif($name eq "AND")
211 $self->state($STATE_BOOLEAN);
212 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
216 $self->state($STATE_BOOLEAN);
217 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
221 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
224 push(@{$self->{elements}}, $artist);
225 $self->state($STATE_ALBUMS);
229 $self->state($STATE_INVALID);
233 elsif($state==$STATE_BOOLEAN)
235 # print "SM: BOOLEAN: $name\n";
236 my $parent=$self->tail();
238 if($self->is("boolean", $parent) &&
239 $parent->{name} eq "NOT")
243 if($allownot && $name eq "NOT")
245 $self->state($STATE_BOOLEAN);
246 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
250 my $tag=ID3FS::Path::Node->new($self->{db}, "tag", $name);
253 push(@{$self->{elements}}, $tag);
255 $self->state($STATE_TAG);
259 $self->state($STATE_INVALID);
263 elsif($state==$STATE_ALBUMS)
265 # print "SM: ALBUM: $name\n";
266 if($name eq $PATH_ALLTRACKS)
268 $self->state($STATE_TRACKLIST);
270 elsif($name eq $PATH_NOALBUM)
272 $self->state($STATE_TRACKLIST);
276 my $album=ID3FS::Path::Node->new($self->{db}, "album", $name);
279 push(@{$self->{elements}}, $album);
280 $self->state($STATE_TRACKLIST);
284 $self->state($STATE_INVALID);
288 elsif($state==$STATE_TRACKLIST)
290 # print "SM: TRACKLIST: $name\n";
291 my $track=ID3FS::Path::Node->new($self->{db}, "file", $name);
294 push(@{$self->{elements}}, $track);
295 $self->state($STATE_FILE);
299 $self->state($STATE_INVALID);
302 elsif($state==$STATE_FILE)
304 # print "SM: FILE: $name\n";
305 # Can't have anything after a filename
306 $self->state($STATE_INVALID);
308 elsif($state==$STATE_ALL)
310 if($name eq $PATH_ALLTRACKS)
312 $self->state($STATE_TRACKLIST);
314 elsif($name eq $PATH_NOARTIST)
316 $self->state($STATE_TRACKLIST);
320 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
323 push(@{$self->{elements}}, $artist);
324 $self->state($STATE_ALBUMS);
328 $self->state($STATE_INVALID);
334 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
335 $self->state($STATE_INVALID);
339 # remove trailing boolean
340 my @elements=@{$self->{elements}};
341 while(@elements && $self->is("boolean", $elements[$#elements]))
345 # sort elements by precedence
346 @elements=$self->sort_elements(@elements);
347 $self->{tagtree}=$self->elements_to_tree(\@elements);
350 # my ($conditions, @joins)=$self->{tagtree}->to_sql();
351 # print "CONDITIONS(", scalar(@joins), "): ", $conditions, "\n";
357 my($self, $newstate)=@_;
358 if(defined($newstate))
360 $self->{state}=$newstate;
361 $self->{curtagdepth}++ if($newstate == $STATE_TAG);
363 return $self->{state};
368 my($self, $elements)=@_;
369 return undef unless(@$elements);
370 my ($left, $right, $op)=(undef, undef, undef);
371 my $thing=pop @$elements;
372 if($self->is("boolean", $thing))
374 $right=$self->elements_to_tree($elements);
375 if($thing->{name} ne "NOT")
377 $left=$self->elements_to_tree($elements);
380 $thing->right($right);
385 # Dijkstra's shunting-yard algorithm
388 my ($self, @input)=@_;
391 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
392 while(my $thing = shift @input)
394 if($self->is("tag", $thing))
396 # Handle tag values by dropping parent
397 if(@input && $self->is("tag", $input[0]))
401 push(@output, $thing);
403 elsif($self->is("boolean", $thing))
407 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
409 push(@output, pop(@opstack));
411 push(@opstack, $thing);
416 push(@output, pop(@opstack));
418 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
425 return() unless(defined($self->{tagtree}));
426 return($self->{tagtree}->used_tags());
432 my $tail=$self->tail();
433 if($self->is("tag", $tail))
435 return($self->{db}->tag_has_values($tail->id()));
442 my $tail=$self->tail();
443 if($self->is("tag", $tail))
450 sub trailing_tag_parent
453 my $tail=$self->tail();
454 if($self->is("tag", $tail))
456 return($tail->{parents_id});
464 return($self->{elements}->[$#{$self->{elements}}]);
470 return($self->is($type, $self->tail()));
475 my($self, $type, $thing)=@_;
476 return 0 unless($thing);
477 return 0 unless($thing->type());
478 return 1 if($type eq $thing->type());
482 # the one before last
486 return($self->{elements}->[($#{$self->{elements}}) - 1]);
489 ######################################################################
494 if(!$self->{tagtree}) # / or /NOT
496 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
497 return($self->{db}->cmd_firstcol($sql));
499 my $hasvals=$self->expecting_values();
500 my $parent=$self->trailing_tag_parent();
501 # print "THASVALS: $hasvals\n";
502 # print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
504 my $sql="SELECT tags.name FROM ";
507 $sql .= "files_x_tags\n";
512 $self->tags_subselect() .
514 "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n");
516 $sql .= "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n";
518 my $id=$self->trailing_tag_id();
520 my $parentclause= "tags.parents_id='";
523 $parentclause .= $id;
527 $parentclause .= $parent;
529 $parentclause .= "'";
530 push(@andclauses, $parentclause);
532 my @used=$self->used_tags();
535 push(@andclauses, "tags.id NOT IN (" . join(', ', @used) . ")");
539 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
542 $sql .= "GROUP BY tags.name;";
543 print "SQL(TAGS): $sql\n" if($self->{verbose});
544 my @tagnames=$self->{db}->cmd_firstcol($sql);
545 print("SUBNAMES: ", join(', ', @tagnames), "\n") if($self->{verbose});
552 if(!@{$self->{elements}}) # /ALL
554 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
555 return($self->{db}->cmd_firstcol($sql));
558 my $sql=$self->sql_start("artists.name");
559 $sql .= ("INNER JOIN artists ON files.artists_id=artists.id\n" .
560 "WHERE artists.name != ''\n" .
561 "GROUP BY artists.name;");
562 print "SQL(ARTISTS): $sql\n" if($self->{verbose});
563 my @tagnames=$self->{db}->cmd_firstcol($sql);
564 print("ARTISTS: ", join(', ', @tagnames), "\n") if($self->{verbose});
572 my $tail=$self->tail();
573 if($self->is("artist", $tail))
575 return $self->artist_albums($tail->id());
577 my $sql=$self->sql_start("albums.name");
578 $sql .= ("INNER JOIN albums ON files.albums_id=albums.id\n" .
579 "WHERE albums.name != ''\n" .
580 "GROUP BY albums.name;");
581 print "SQL(ALBUMS): \n$sql\n" if($self->{verbose});
582 my @names=$self->{db}->cmd_firstcol($sql);
583 print("ALBUMS: ", join(', ', @names), "\n") if($self->{verbose});
589 my($self, $artist_id)=@_;
590 my $sql=$self->sql_start("albums.name");
591 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
592 "INNER JOIN artists ON artists.id=files.artists_id\n" .
593 "WHERE artists.id=? and albums.name <> ''\n" .
594 "GROUP BY albums.name\n");
595 print "ARTIST_ALBUMS SQL: $sql\n" if($self->{verbose});
596 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
597 print("ALBUMS: ", join(', ', @albums), "\n") if($self->{verbose});
603 my($self, $artist_id)=@_;
604 my $sql=$self->sql_start("files.name");
605 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
606 "INNER JOIN albums ON albums.id=files.albums_id\n" .
607 "WHERE artists.id=? AND albums.name=''\n" .
608 "GROUP BY files.name\n");
609 print "ARTIST_TRACKS SQL: $sql\n" if($self->{verbose});
610 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
611 print("ARTISTTRACKS: ", join(', ', @names), "\n") if($self->{verbose});
617 my($self, $artist_id, $album_id)=@_;
618 my $sql=("SELECT files.name FROM files\n" .
619 "INNER JOIN albums ON albums.id=files.albums_id\n" .
620 "INNER JOIN artists ON artists.id=files.artists_id\n" .
621 "WHERE artists.id=? AND albums.id=?\n" .
622 "GROUP BY files.name\n");
623 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n" if($self->{verbose});
624 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
625 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
632 my $tail=$self->tail();
633 if($self->is("artist", $tail))
635 return $self->artist_tracks($tail->id());
637 elsif($self->is("album", $tail))
640 my $artist=$self->tail_parent();
641 if($self->is("artist", $artist))
643 # should always happen
644 $artist_id=$artist->id();
646 return $self->album_tracks($artist_id, $tail->id());
648 my $sql=$self->sql_start("files.name");
649 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
650 if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
652 $sql .= "WHERE artists.name =''\n";
654 $sql .= "GROUP BY files.name;";
655 print "TRACKS SQL($self->{path}): $sql\n" if($self->{verbose});
656 my @names=$self->{db}->cmd_firstcol($sql);
657 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
663 my($self, $mountpoint)=@_;
664 my $tail=$self->tail();
665 if($self->is("file", $tail))
668 my $sql=("SELECT paths.name, files.name FROM files\n" .
669 "INNER JOIN paths ON files.paths_id=paths.id\n" .
670 "WHERE files.id=?\n" .
671 "GROUP BY paths.name, files.name");
672 print "FILENAME SQL: $sql\n" if($self->{verbose});
673 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
674 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
675 return($self->{db}->relativise($path, $name, $mountpoint));
677 # should never happen
684 my $hasvals=$self->expecting_values();
687 # FIXME: is this used?
688 die "IN_ALL CALLED!!\n";
689 return "\tSELECT id FROM files AS files_id\n";
691 my $tree=$self->{tagtree};
693 print "UNDEF!!\n" unless($self->{tagtree});
694 my $parent=$self->trailing_tag_parent();
696 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
697 # print "TREE: ", $tree->print(), "\n";
701 $tag=$self->trailing_tag_id();
702 # print "Trailing id: $tag\n";
704 my ($sqlclause, @joins)=(undef, ());
705 ($sqlclause, @joins) = $tree->to_sql($hasvals) if($tree);
706 # print "SQL(" . scalar(@joins) ."): $sqlclause\n";
707 my $sql="\tSELECT fxt1.files_id FROM tags t1";
710 # $joinsneeded++ if($tag);
711 for(my $i=0; $i <= $#joins; $i++)
715 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
716 "t${cnt}.id=fxt${cnt}.tags_id");
719 push(@crosses, "CROSS JOIN tags t$cnt");
720 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
722 push(@inners, $inner);
724 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
725 $sql .= ("\n" . join("\n", @inners)) if(@inners);
726 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
729 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
731 $sql .= "\n\tGROUP BY fxt1.files_id\n";
737 my($self, $tables)=@_;
738 my $sql="SELECT $tables FROM ";
746 $self->tags_subselect() .
748 "INNER JOIN files ON subselect.files_id=files.id\n");
754 sub constraints_tag_list
756 my($self, @constraints)=@_;
760 for my $constraint (@constraints)
762 # print ref($constraint), ": ", $constraint->{name}, "\n";
763 if($self->is("tag", $constraint))
765 if(defined($lasttag))
768 push(@tags_vals, [$lasttag, $constraint->id()]) if defined($constraint->id());
771 elsif($self->tag_has_values($constraint->id()))
773 # print "HASVALUES\n";
774 $lasttag=$constraint->id() if defined($constraint->id());
778 # print "NOVALUES\n";
779 push(@tags, $constraint->id()) if(defined($constraint->id()));
783 @tags=map{ "\"$_\""; } @tags;
784 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
785 $lasttag="\"$lasttag\"" if defined($lasttag);
786 return(\@tags, \@tags_vals, $lasttag);
789 # we just filter $ALLTRACKS, $NOARTIST and $NOALBUM
790 # filtering tags properly requires up to four levels of recursion
791 # (tag/tagval/AND/NOT) and is too slow
795 return(@dirs) unless($ENABLE_FILTER);
796 my $base=$self->{path};
800 # print "\nFILTER (",$self->state(), "): $base / $dir\n";
801 if($self->empty("$base/$dir"))
803 # print "empty: $base / $dir\n";
807 # print "non-empty, accepting: $base / $dir\n";
808 push(@outdirs, $dir);
817 my $path=ID3FS::Path->new($self->{db}, $dir, $self->{verbose},
818 ($self->{maxtagdepth} - $self->{curtagdepth}));
819 return 1 unless($path->isvalid());
820 my($subdirs,$subfiles)=$path->dirents();
821 return 0 if(@$subfiles || @$subdirs);
825 # if path is .../OR/ or .../OR/NOT
829 my $tail=$self->tail();
830 return 0 unless($tail);
831 return 0 unless($tail->type() eq "boolean");
832 return 1 if($tail->name() eq "OR");
833 return 0 unless($tail->name() eq "NOT");
834 my $parent=$self->tail_parent();
835 return 0 unless($parent);
836 return 0 unless($parent->type() eq "boolean");
837 return 1 if($parent->name() eq "OR");