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==$STATE_ALL)
82 @dents=($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} < $self->{maxtagdepth}))
97 push(@dents, ($ENABLE_FILTER ?
98 $self->filter($PATH_ALLTRACKS, $PATH_NOARTIST) :
99 ($PATH_ALLTRACKS, $PATH_NOARTIST)));
100 push(@dents, $self->artists());
103 elsif($state==$STATE_BOOLEAN)
105 my $parent=$self->tail();
106 unless($self->is("boolean", $parent) &&
107 $parent->{name} eq "NOT")
111 push(@dents,$self->tags());
113 elsif($state==$STATE_ROOT)
115 @dents=(qw(ALL NOT), $self->tags());
117 elsif($state==$STATE_ALBUMS)
119 @dents=($self->filter($PATH_ALLTRACKS, $PATH_NOALBUM), $self->albums());
121 elsif($state==$STATE_TRACKLIST)
123 @fents=$self->tracks();
127 print "DIRENTS: UNHANDLED STATE: $state\n";
129 return(\@dents, \@fents);
135 @{$self->{components}}=split(/\//, $self->{path});
136 shift @{$self->{components}}; # drop empty field before leading /
137 # print "PATH: $self->{path}\n";
138 $self->state($STATE_ROOT);
139 return if($self->{path} eq "/");
140 my @parts=@{$self->{components}};
142 $self->{elements}=[];
146 while(defined(my $name=shift @parts))
148 # print "NAME: $name\n";
149 my $state=$self->state();
150 if($state==$STATE_INVALID)
152 # print "SM: INVALID: $name\n";
155 elsif($state==$STATE_ROOT)
157 # print "SM: ROOT: $name\n";
161 $self->state($STATE_ALL);
163 elsif($name eq "NOT")
166 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
167 $self->state($STATE_BOOLEAN);
171 $tag=ID3FS::Path::Node->new($self->{db},"tag", $name);
174 push(@{$self->{elements}}, $tag);
176 $self->state($STATE_TAG);
180 $self->state($STATE_INVALID);
184 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
186 my $tag=$self->tail();
187 # print "SM: TAG/TAGVAL($state): $name\n";
188 if($state==$STATE_TAG && $self->is("tag", $tag) &&
189 $self->{db}->tag_has_values($tag->id()))
191 # print "Parsing: parent: $tag->id()\n";
192 my $tagval=ID3FS::Path::Node->new($self->{db}, "tag", $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(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
219 $self->state($STATE_BOOLEAN);
220 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
224 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
227 push(@{$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($self->is("boolean", $parent) &&
242 $parent->{name} eq "NOT")
246 if($allownot && $name eq "NOT")
248 $self->state($STATE_BOOLEAN);
249 push(@{$self->{elements}}, ID3FS::Path::Node->new($self->{db}, "boolean", $name));
253 my $tag=ID3FS::Path::Node->new($self->{db}, "tag", $name);
256 push(@{$self->{elements}}, $tag);
258 $self->state($STATE_TAG);
262 $self->state($STATE_INVALID);
266 elsif($state==$STATE_ALBUMS)
268 # print "SM: ALBUM: $name\n";
269 if($name eq $PATH_ALLTRACKS)
271 $self->state($STATE_TRACKLIST);
273 elsif($name eq $PATH_NOALBUM)
275 $self->state($STATE_TRACKLIST);
279 my $album=ID3FS::Path::Node->new($self->{db}, "album", $name);
282 push(@{$self->{elements}}, $album);
283 $self->state($STATE_TRACKLIST);
287 $self->state($STATE_INVALID);
291 elsif($state==$STATE_TRACKLIST)
293 # print "SM: TRACKLIST: $name\n";
294 my $track=ID3FS::Path::Node->new($self->{db}, "file", $name);
297 push(@{$self->{elements}}, $track);
298 $self->state($STATE_FILE);
302 $self->state($STATE_INVALID);
305 elsif($state==$STATE_FILE)
307 # print "SM: FILE: $name\n";
308 # Can't have anything after a filename
309 $self->state($STATE_INVALID);
311 elsif($state==$STATE_ALL)
313 if($name eq $PATH_ALLTRACKS)
315 $self->state($STATE_TRACKLIST);
317 elsif($name eq $PATH_NOARTIST)
319 $self->state($STATE_TRACKLIST);
323 my $artist=ID3FS::Path::Node->new($self->{db}, "artist", $name);
326 push(@{$self->{elements}}, $artist);
327 $self->state($STATE_ALBUMS);
331 $self->state($STATE_INVALID);
337 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
338 $self->state($STATE_INVALID);
342 # remove trailing boolean
343 my @elements=@{$self->{elements}};
344 while(@elements && $self->is("boolean", $elements[$#elements]))
348 # sort elements by precedence
349 @elements=$self->sort_elements(@elements);
350 $self->{tagtree}=$self->elements_to_tree(\@elements);
353 # my ($conditions, @joins)=$self->{tagtree}->to_sql();
354 # print "CONDITIONS(", scalar(@joins), "): ", $conditions, "\n";
360 my($self, $newstate)=@_;
361 if(defined($newstate))
363 $self->{state}=$newstate;
364 $self->{curtagdepth}++ if($newstate == $STATE_TAG);
366 return $self->{state};
371 my($self, $elements)=@_;
372 return undef unless(@$elements);
373 my ($left, $right, $op)=(undef, undef, undef);
374 my $thing=pop @$elements;
375 if($self->is("boolean", $thing))
377 $right=$self->elements_to_tree($elements);
378 if($thing->{name} ne "NOT")
380 $left=$self->elements_to_tree($elements);
383 $thing->right($right);
388 # Dijkstra's shunting-yard algorithm
391 my ($self, @input)=@_;
394 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
395 while(my $thing = shift @input)
397 if($self->is("tag", $thing))
399 # Handle tag values by dropping parent
400 if(@input && $self->is("tag", $input[0]))
404 push(@output, $thing);
406 elsif($self->is("boolean", $thing))
410 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
412 push(@output, pop(@opstack));
414 push(@opstack, $thing);
419 push(@output, pop(@opstack));
421 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
428 return() unless(defined($self->{tagtree}));
429 return($self->{tagtree}->used_tags());
435 my $tail=$self->tail();
436 if($self->is("tag", $tail))
438 return($self->{db}->tag_has_values($tail->id()));
445 my $tail=$self->tail();
446 if($self->is("tag", $tail))
453 sub trailing_tag_parent
456 my $tail=$self->tail();
457 if($self->is("tag", $tail))
459 return($tail->{parents_id});
467 return($self->{elements}->[$#{$self->{elements}}]);
473 return($self->is($type, $self->tail()));
478 my($self, $type, $thing)=@_;
479 return 0 unless($thing);
480 return 0 unless($thing->type());
481 return 1 if($type eq $thing->type());
485 # the one before last
489 return($self->{elements}->[($#{$self->{elements}}) - 1]);
492 ######################################################################
497 if(!$self->{tagtree}) # / or /NOT
499 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
500 return($self->{db}->cmd_firstcol($sql));
502 my $hasvals=$self->expecting_values();
503 my $parent=$self->trailing_tag_parent();
504 # print "THASVALS: $hasvals\n";
505 # print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
507 my $sql=("SELECT tags.name FROM (\n" .
508 $self->tags_subselect() .
510 "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
511 "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
513 my $id=$self->trailing_tag_id();
515 my $parentclause= "tags.parents_id='";
518 $parentclause .= $id;
522 $parentclause .= $parent;
524 $parentclause .= "'";
525 push(@andclauses, $parentclause);
527 my @used=$self->used_tags();
530 push(@andclauses, "tags.id NOT IN (" . join(', ', @used) . ")");
534 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
537 $sql .= "GROUP BY tags.name;";
538 print "SQL(TAGS): $sql\n" if($self->{verbose});
539 my @tagnames=$self->{db}->cmd_firstcol($sql);
540 print("SUBNAMES: ", join(', ', @tagnames), "\n") if($self->{verbose});
547 if(!@{$self->{elements}}) # /ALL
549 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
550 return($self->{db}->cmd_firstcol($sql));
553 my $sql=$self->sql_start("artists.name");
554 $sql .= ("INNER JOIN artists ON files.artists_id=artists.id\n" .
555 "WHERE artists.name != ''\n" .
556 "GROUP BY artists.name;");
557 print "SQL(ARTISTS): $sql\n" if($self->{verbose});
558 my @tagnames=$self->{db}->cmd_firstcol($sql);
559 print("ARTISTS: ", join(', ', @tagnames), "\n") if($self->{verbose});
567 my $tail=$self->tail();
568 if($self->is("artist", $tail))
570 return $self->artist_albums($tail->id());
572 my $sql=$self->sql_start("albums.name");
573 $sql .= ("INNER JOIN albums ON files.albums_id=albums.id\n" .
574 "WHERE albums.name != ''\n" .
575 "GROUP BY albums.name;");
576 print "SQL(ALBUMS): \n$sql\n" if($self->{verbose});
577 my @names=$self->{db}->cmd_firstcol($sql);
578 print("ALBUMS: ", join(', ', @names), "\n") if($self->{verbose});
584 my($self, $artist_id)=@_;
585 my $sql=$self->sql_start("albums.name");
586 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
587 "INNER JOIN artists ON artists.id=files.artists_id\n" .
588 "WHERE artists.id=? and albums.name <> ''\n" .
589 "GROUP BY albums.name\n");
590 print "ARTIST_ALBUMS SQL: $sql\n" if($self->{verbose});
591 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
592 print("ALBUMS: ", join(', ', @albums), "\n") if($self->{verbose});
598 my($self, $artist_id)=@_;
599 my $sql=$self->sql_start("files.name");
600 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
601 "INNER JOIN albums ON albums.id=files.albums_id\n" .
602 "WHERE artists.id=? AND albums.name=''\n" .
603 "GROUP BY files.name\n");
604 print "ARTIST_TRACKS SQL: $sql\n" if($self->{verbose});
605 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
606 print("ARTISTTRACKS: ", join(', ', @names), "\n") if($self->{verbose});
612 my($self, $artist_id, $album_id)=@_;
613 my $sql=("SELECT files.name FROM files\n" .
614 "INNER JOIN albums ON albums.id=files.albums_id\n" .
615 "INNER JOIN artists ON artists.id=files.artists_id\n" .
616 "WHERE artists.id=? AND albums.id=?\n" .
617 "GROUP BY files.name\n");
618 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n" if($self->{verbose});
619 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
620 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
627 my $tail=$self->tail();
628 if($self->is("artist", $tail))
630 return $self->artist_tracks($tail->id());
632 elsif($self->is("album", $tail))
635 my $artist=$self->tail_parent();
636 if($self->is("artist", $artist))
638 # should always happen
639 $artist_id=$artist->id();
641 return $self->album_tracks($artist_id, $tail->id());
643 my $sql=$self->sql_start("files.name");
644 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
645 if($self->{components}->[$#{$self->{components}}] eq $PATH_NOARTIST)
647 $sql .= "WHERE artists.name =''\n";
649 $sql .= "GROUP BY files.name;";
650 print "TRACKS SQL($self->{path}): $sql\n" if($self->{verbose});
651 my @names=$self->{db}->cmd_firstcol($sql);
652 print("TRACKS: ", join(', ', @names), "\n") if($self->{verbose});
658 my($self, $mountpoint)=@_;
659 my $tail=$self->tail();
660 if($self->is("file", $tail))
663 my $sql=("SELECT paths.name, files.name FROM files\n" .
664 "INNER JOIN paths ON files.paths_id=paths.id\n" .
665 "WHERE files.id=?\n" .
666 "GROUP BY paths.name, files.name");
667 print "FILENAME SQL: $sql\n" if($self->{verbose});
668 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
669 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
670 return($self->{db}->relativise($path, $name, $mountpoint));
672 # should never happen
679 my $hasvals=$self->expecting_values();
682 return "\tSELECT id FROM files AS files_id\n";
684 my $tree=$self->{tagtree};
686 print "UNDEF!!\n" unless($self->{tagtree});
687 my $parent=$self->trailing_tag_parent();
689 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
690 # print "TREE: ", $tree->print(), "\n";
694 $tag=$self->trailing_tag_id();
695 # print "Trailing id: $tag\n";
697 my ($sqlclause, @joins)=(undef, ());
698 ($sqlclause, @joins) = $tree->to_sql($hasvals) if($tree);
699 # print "SQL(" . scalar(@joins) ."): $sqlclause\n";
700 my $sql="\tSELECT fxt1.files_id FROM tags t1";
703 # $joinsneeded++ if($tag);
704 for(my $i=0; $i <= $#joins; $i++)
708 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
709 "t${cnt}.id=fxt${cnt}.tags_id");
712 push(@crosses, "CROSS JOIN tags t$cnt");
713 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
715 push(@inners, $inner);
717 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
718 $sql .= ("\n" . join("\n", @inners)) if(@inners);
719 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
722 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
724 $sql .= "\n\tGROUP BY fxt1.files_id\n";
730 my($self, $tables)=@_;
731 my $sql="SELECT $tables FROM ";
739 $self->tags_subselect() .
741 "INNER JOIN files ON subselect.files_id=files.id\n");
747 sub constraints_tag_list
749 my($self, @constraints)=@_;
753 for my $constraint (@constraints)
755 # print ref($constraint), ": ", $constraint->{name}, "\n";
756 if($self->is("tag", $constraint))
758 if(defined($lasttag))
761 push(@tags_vals, [$lasttag, $constraint->id()]) if defined($constraint->id());
764 elsif($self->tag_has_values($constraint->id()))
766 # print "HASVALUES\n";
767 $lasttag=$constraint->id() if defined($constraint->id());
771 # print "NOVALUES\n";
772 push(@tags, $constraint->id()) if(defined($constraint->id()));
776 @tags=map{ "\"$_\""; } @tags;
777 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
778 $lasttag="\"$lasttag\"" if defined($lasttag);
779 return(\@tags, \@tags_vals, $lasttag);
782 # we just filter $ALLTRACKS, $NOARTIST and $NOALBUM
783 # filtering tags properly requires up to four levels of recursion
784 # (tag/tagval/AND/NOT) and is too slow
788 my $base=$self->{path};
792 # print "\nFILTER (",$self->state(), "): $base / $dir\n";
793 if($self->empty("$base/$dir"))
795 # print "empty: $base / $dir\n";
799 # print "non-empty, accepting: $base / $dir\n";
800 push(@outdirs, $dir);
809 my $path=ID3FS::Path->new($self->{db}, $dir, $self->{verbose},
810 ($self->{maxtagdepth} - $self->{curtagdepth}));
811 return 1 unless($path->isvalid());
812 my($subdirs,$subfiles)=$path->dirents();
813 return 0 if(@$subfiles || @$subdirs);