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";
20 my $class=ref($proto) || $proto;
27 $self->{verbose}=shift;
28 $self->{maxtagdepth}=shift;
29 $self->{curtagdepth}=0;
30 $self->{path} =~ s/\/\//\//g; # drop doubled slashes
33 # print "STATE: ", $self->state(), "\n";
40 if(($self->state() == $STATE_FILE) ||
41 ($self->state() == $STATE_INVALID))
51 return($self->state() == $STATE_FILE);
57 return($self->state() != $STATE_INVALID);
62 my($self, $mountpoint)=@_;
63 if($self->state() == $STATE_FILE)
65 return $self->filename($mountpoint);
67 return "ERROR"; #should never happen?
75 my $state=$self->state();
76 # print "DIRENTS: STATE: $state\n";
77 # print "DIRENTS: FILE: $self->{path}\n";
78 if($state==$STATE_ALL)
80 @dents=($PATH_ALLTRACKS, $PATH_NOARTIST, $self->artists());
82 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
84 if($state==$STATE_TAG && $self->at("tag") &&
85 $self->{db}->tag_has_values($self->tail()->id()))
91 if($self->{maxtagdepth} && ($self->{curtagdepth} < $self->{maxtagdepth}))
95 push(@dents, $self->filter($PATH_ALLTRACKS, $PATH_NOARTIST));
96 push(@dents, $self->artists());
99 elsif($state==$STATE_BOOLEAN)
101 my $parent=$self->tail();
102 unless($self->is("boolean", $parent) &&
103 $parent->{name} eq "NOT")
107 push(@dents,$self->tags());
109 elsif($state==$STATE_ROOT)
111 @dents=(qw(ALL NOT), $self->tags());
113 elsif($state==$STATE_ALBUMS)
115 @dents=($self->filter($PATH_ALLTRACKS, $PATH_NOALBUM), $self->albums());
117 elsif($state==$STATE_TRACKLIST)
119 @fents=$self->tracks();
123 print "DIRENTS: UNHANDLED STATE: $state\n";
125 return(\@dents, \@fents);
131 @{$self->{components}}=split(/\//, $self->{path});
132 shift @{$self->{components}}; # drop empty field before leading /
133 # print "PATH: $self->{path}\n";
134 $self->state($STATE_ROOT);
135 return if($self->{path} eq "/");
136 my @parts=@{$self->{components}};
138 $self->{elements}=[];
142 while(defined(my $name=shift @parts))
144 # print "NAME: $name\n";
145 my $state=$self->state();
146 if($state==$STATE_INVALID)
148 # print "SM: INVALID: $name\n";
151 elsif($state==$STATE_ROOT)
153 # print "SM: ROOT: $name\n";
157 $self->state($STATE_ALL);
159 elsif($name eq "NOT")
162 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
163 $self->state($STATE_BOOLEAN);
167 $tag=ID3FS::Path::Node->new($self->{db},"tag", $name);
170 push(@{$self->{elements}}, $tag);
172 $self->state($STATE_TAG);
176 $self->state($STATE_INVALID);
180 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
182 my $tag=$self->tail();
183 # print "SM: TAG/TAGVAL($state): $name\n";
184 if($state==$STATE_TAG && $self->is("tag", $tag) &&
185 $self->{db}->tag_has_values($tag->id()))
187 # print "Parsing: parent: $tag->id()\n";
188 my $tagval=ID3FS::Path::Node->new($self->{db}, "tag", $name, $tag->id());
191 $self->state($STATE_TAGVAL);
193 push(@{$self->{elements}}, $tagval);
197 $self->state($STATE_INVALID);
200 elsif($name eq $PATH_ALLTRACKS)
202 $self->state($STATE_TRACKLIST);
204 elsif($name eq $PATH_NOARTIST)
206 $self->state($STATE_TRACKLIST);
208 elsif($name eq "AND")
210 $self->state($STATE_BOOLEAN);
211 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
215 $self->state($STATE_BOOLEAN);
216 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
220 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
223 push(@{$self->{elements}}, $artist);
224 $self->state($STATE_ALBUMS);
228 $self->state($STATE_INVALID);
232 elsif($state==$STATE_BOOLEAN)
234 # print "SM: BOOLEAN: $name\n";
235 my $parent=$self->tail();
237 if($self->is("boolean", $parent) &&
238 $parent->{name} eq "NOT")
242 if($allownot && $name eq "NOT")
244 $self->state($STATE_BOOLEAN);
245 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
249 my $tag=ID3FS::Path::Node->new($self->{db}, "tag", $name);
252 push(@{$self->{elements}}, $tag);
254 $self->state($STATE_TAG);
258 $self->state($STATE_INVALID);
262 elsif($state==$STATE_ALBUMS)
264 # print "SM: ALBUM: $name\n";
265 if($name eq $PATH_ALLTRACKS)
267 $self->state($STATE_TRACKLIST);
269 elsif($name eq $PATH_NOALBUM)
271 $self->state($STATE_TRACKLIST);
275 my $album=ID3FS::Path::Node->new($self->{db}, "album", $name);
278 push(@{$self->{elements}}, $album);
279 $self->state($STATE_TRACKLIST);
283 $self->state($STATE_INVALID);
287 elsif($state==$STATE_TRACKLIST)
289 # print "SM: TRACKLIST: $name\n";
290 my $track=ID3FS::Path::Node->new($self->{db}, "file", $name);
293 push(@{$self->{elements}}, $track);
294 $self->state($STATE_FILE);
298 $self->state($STATE_INVALID);
301 elsif($state==$STATE_FILE)
303 # print "SM: FILE: $name\n";
304 # Can't have anything after a filename
305 $self->state($STATE_INVALID);
307 elsif($state==$STATE_ALL)
309 if($name eq $PATH_ALLTRACKS)
311 $self->state($STATE_TRACKLIST);
313 elsif($name eq $PATH_NOARTIST)
315 $self->state($STATE_TRACKLIST);
319 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
322 push(@{$self->{elements}}, $artist);
323 $self->state($STATE_ALBUMS);
327 $self->state($STATE_INVALID);
333 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
334 $self->state($STATE_INVALID);
338 # remove trailing boolean
339 my @elements=@{$self->{elements}};
340 while(@elements && $self->is("boolean", $elements[$#elements]))
344 # sort elements by precedence
345 @elements=$self->sort_elements(@elements);
346 $self->{tagtree}=$self->elements_to_tree(\@elements);
349 # my ($conditions, @joins)=$self->{tagtree}->to_sql();
350 # print "CONDITIONS(", scalar(@joins), "): ", $conditions, "\n";
356 my($self, $newstate)=@_;
357 if(defined($newstate))
359 $self->{state}=$newstate;
360 $self->{curtagdepth}++ if($newstate == $STATE_TAG);
362 return $self->{state};
367 my($self, $elements)=@_;
368 return undef unless(@$elements);
369 my ($left, $right, $op)=(undef, undef, undef);
370 my $thing=pop @$elements;
371 if($self->is("boolean", $thing))
373 $right=$self->elements_to_tree($elements);
374 if($thing->{name} ne "NOT")
376 $left=$self->elements_to_tree($elements);
379 $thing->right($right);
384 # Dijkstra's shunting-yard algorithm
387 my ($self, @input)=@_;
390 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
391 while(my $thing = shift @input)
393 if($self->is("tag", $thing))
395 # Handle tag values by dropping parent
396 if(@input && $self->is("tag", $input[0]))
400 push(@output, $thing);
402 elsif($self->is("boolean", $thing))
406 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
408 push(@output, pop(@opstack));
410 push(@opstack, $thing);
415 push(@output, pop(@opstack));
417 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
424 return() unless(defined($self->{tagtree}));
425 return($self->{tagtree}->used_tags());
431 my $tail=$self->tail();
432 if($self->is("tag", $tail))
434 return($self->{db}->tag_has_values($tail->id()));
441 my $tail=$self->tail();
442 if($self->is("tag", $tail))
449 sub trailing_tag_parent
452 my $tail=$self->tail();
453 if($self->is("tag", $tail))
455 return($tail->{parents_id});
463 return($self->{elements}->[$#{$self->{elements}}]);
469 return($self->is($type, $self->tail()));
474 my($self, $type, $thing)=@_;
475 return 0 unless($thing);
476 return 0 unless($thing->type());
477 return 1 if($type eq $thing->type());
481 # the one before last
485 return($self->{elements}->[($#{$self->{elements}}) - 1]);
488 ######################################################################
493 if(!$self->{tagtree}) # / or /NOT
495 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
496 return($self->{db}->cmd_firstcol($sql));
498 my $hasvals=$self->expecting_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");
509 my $id=$self->trailing_tag_id();
511 my $parentclause= "tags.parents_id='";
514 $parentclause .= $id;
518 $parentclause .= $parent;
520 $parentclause .= "'";
521 push(@andclauses, $parentclause);
523 my @used=$self->used_tags();
526 push(@andclauses, "tags.id NOT IN (" . join(', ', @used) . ")");
530 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
533 $sql .= "GROUP BY tags.name;";
534 print "SQL(TAGS): $sql\n" if($self->{verbose});
535 my @tagnames=$self->{db}->cmd_firstcol($sql);
536 print("SUBNAMES: ", join(', ', @tagnames), "\n") if($self->{verbose});
543 if(!@{$self->{elements}}) # /ALL
545 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
546 return($self->{db}->cmd_firstcol($sql));
549 my $sql=$self->sql_start("artists.name");
550 $sql .= ("INNER JOIN artists ON files.artists_id=artists.id\n" .
551 "WHERE artists.name != ''\n" .
552 "GROUP BY artists.name;");
553 print "SQL(ARTISTS): $sql\n" if($self->{verbose});
554 my @tagnames=$self->{db}->cmd_firstcol($sql);
555 print("ARTISTS: ", join(', ', @tagnames), "\n") if($self->{verbose});
563 my $tail=$self->tail();
564 if($self->is("artist", $tail))
566 return $self->artist_albums($tail->id());
568 my $sql=$self->sql_start("albums.name");
569 $sql .= ("INNER JOIN albums ON files.albums_id=albums.id\n" .
570 "WHERE albums.name != ''\n" .
571 "GROUP BY albums.name;");
572 print "SQL(ALBUMS): \n$sql\n" if($self->{verbose});
573 my @names=$self->{db}->cmd_firstcol($sql);
574 print("ALBUMS: ", join(', ', @names), "\n") if($self->{verbose});
580 my($self, $artist_id)=@_;
581 my $sql=$self->sql_start("albums.name");
582 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
583 "INNER JOIN artists ON artists.id=files.artists_id\n" .
584 "WHERE artists.id=? and albums.name <> ''\n" .
585 "GROUP BY albums.name\n");
586 print "ARTIST_ALBUMS SQL: $sql\n" if($self->{verbose});
587 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
588 print("ALBUMS: ", join(', ', @albums), "\n") if($self->{verbose});
594 my($self, $artist_id)=@_;
595 my $sql=$self->sql_start("files.name");
596 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
597 "INNER JOIN albums ON albums.id=files.albums_id\n" .
598 "WHERE artists.id=? AND albums.name=''\n" .
599 "GROUP BY files.name\n");
600 print "ARTIST_TRACKS SQL: $sql\n" if($self->{verbose});
601 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
602 print("ARTISTTRACKS: ", join(', ', @names), "\n") if($self->{verbose});
608 my($self, $artist_id, $album_id)=@_;
609 my $sql=("SELECT files.name FROM files\n" .
610 "INNER JOIN albums ON albums.id=files.albums_id\n" .
611 "INNER JOIN artists ON artists.id=files.artists_id\n" .
612 "WHERE artists.id=? AND albums.id=?\n" .
613 "GROUP BY files.name\n");
614 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n" if($self->{verbose});
615 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
616 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
623 my $tail=$self->tail();
624 if($self->is("artist", $tail))
626 return $self->artist_tracks($tail->id());
628 elsif($self->is("album", $tail))
631 my $artist=$self->tail_parent();
632 if($self->is("artist", $artist))
634 # should always happen
635 $artist_id=$artist->id();
637 return $self->album_tracks($artist_id, $tail->id());
639 my $sql=$self->sql_start("files.name");
640 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
641 if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
643 $sql .= "WHERE artists.name =''\n";
645 $sql .= "GROUP BY files.name;";
646 print "TRACKS SQL($self->{path}): $sql\n" if($self->{verbose});
647 my @names=$self->{db}->cmd_firstcol($sql);
648 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
654 my($self, $mountpoint)=@_;
655 my $tail=$self->tail();
656 if($self->is("file", $tail))
659 my $sql=("SELECT paths.name, files.name FROM files\n" .
660 "INNER JOIN paths ON files.paths_id=paths.id\n" .
661 "WHERE files.id=?\n" .
662 "GROUP BY paths.name, files.name");
663 print "FILENAME SQL: $sql\n" if($self->{verbose});
664 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
665 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
666 return($self->{db}->relativise($path, $name, $mountpoint));
668 # should never happen
675 my $hasvals=$self->expecting_values();
678 return "\tSELECT id FROM files AS files_id\n";
680 my $tree=$self->{tagtree};
681 print "UNDEF!!\n" unless($self->{tagtree});
682 my $parent=$self->trailing_tag_parent();
684 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
685 # print "TREE: ", $tree->print(), "\n";
689 $tag=$self->trailing_tag_id();
690 # print "Trailing id: $tag\n";
692 my ($sqlclause, @joins)=(undef, ());
693 ($sqlclause, @joins) = $tree->to_sql($hasvals) if($tree);
694 # print "SQL(" . scalar(@joins) .": $sqlclause\n";
695 my $sql="\tSELECT fxt1.files_id FROM tags t1";
698 # $joinsneeded++ if($tag);
699 for(my $i=0; $i <= $#joins; $i++)
703 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
704 "t${cnt}.id=fxt${cnt}.tags_id");
707 push(@crosses, "CROSS JOIN tags t$cnt");
708 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
710 push(@inners, $inner);
712 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
713 $sql .= ("\n" . join("\n", @inners)) if(@inners);
714 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
717 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
719 $sql .= "\n\tGROUP BY fxt1.files_id\n";
725 my($self, $tables)=@_;
726 my $sql="SELECT $tables FROM ";
734 $self->tags_subselect() .
736 "INNER JOIN files ON subselect.files_id=files.id\n");
742 sub constraints_tag_list
744 my($self, @constraints)=@_;
748 for my $constraint (@constraints)
750 # print ref($constraint), ": ", $constraint->{name}, "\n";
751 if($self->is("tag", $constraint))
753 if(defined($lasttag))
756 push(@tags_vals, [$lasttag, $constraint->id()]) if defined($constraint->id());
759 elsif($self->tag_has_values($constraint->id()))
761 # print "HASVALUES\n";
762 $lasttag=$constraint->id() if defined($constraint->id());
766 # print "NOVALUES\n";
767 push(@tags, $constraint->id()) if(defined($constraint->id()));
771 @tags=map{ "\"$_\""; } @tags;
772 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
773 $lasttag="\"$lasttag\"" if defined($lasttag);
774 return(\@tags, \@tags_vals, $lasttag);
777 # we just filter $ALLTRACKS, $NOARTIST and $NOALBUM
778 # filtering tags properly requires up to four levels of recursion
779 # (tag/tagval/AND/NOT) and is too slow
783 my $base=$self->{path};
787 # print "\nFILTER (",$self->state(), "): $base / $dir\n";
788 if($self->empty("$base/$dir"))
790 # print "empty: $base / $dir\n";
794 # print "non-empty, accepting: $base / $dir\n";
795 push(@outdirs, $dir);
804 my $path=ID3FS::Path->new($self->{db}, $dir, $self->{verbose},
805 ($self->{maxtagdepth} - $self->{curtagdepth}));
806 return 1 unless($path->isvalid());
807 my($subdirs,$subfiles)=$path->dirents();
808 return 0 if(@$subfiles || @$subdirs);