lib/ID3FS/Path.pm

   1 package ID3FS::Path;
   2
   3 use strict;
   4 use warnings;
   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;
  12
  13 our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
  14      $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
  15      $STATE_FILE)=(0..7);
  16
  17 our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
  18
  19 sub new
  20 {
  21     my $proto=shift;
  22     my $class=ref($proto) || $proto;
  23     my $self={};
  24     bless($self,$class);
  25
  26     $self->{elements}=[];
  27     $self->{db}=shift;
  28     $self->{path}=shift;
  29     $self->parse();
  30 #    print "STATE: ", $self->state(), "\n";
  31     return $self;
  32 }
  33
  34 sub isdir
  35 {
  36     my($self)=@_;
  37     if(($self->state() == $STATE_FILE) ||
  38        ($self->state() == $STATE_INVALID))
  39     {
  40         return 0;
  41     }
  42     return 1;
  43 }
  44
  45 sub isfile
  46 {
  47     my($self)=@_;
  48     return 1 if($self->state() == $STATE_FILE);
  49     return 0;
  50 }
  51
  52 sub isvalid
  53 {
  54     my($self)=@_;
  55     return($self->state() != $STATE_INVALID);
  56 }
  57
  58 sub dest
  59 {
  60     my($self, $mountpoint)=@_;
  61     if($self->state() == $STATE_FILE)
  62     {
  63         return $self->filename($mountpoint, $self);
  64     }
  65     return "ERROR"; #should never happen?
  66 }
  67
  68 sub dirents
  69 {
  70     my($self)=@_;
  71     my @dents=();
  72     my $state=$self->state();
  73 #    print "DIRENTS: STATE: $state\n";
  74 #    print "DIRENTS: FILE: $self->{path}\n";
  75     if($state==$STATE_TAG || $state==$STATE_TAGVAL)
  76     {
  77         my $tag=$self->tail();
  78         if($state==$STATE_TAG &&
  79            defined($tag) &&
  80            ref($tag) eq "ID3FS::PathElement::Tag" &&
  81            $self->{db}->tag_has_values($tag->{id}))
  82         {
  83             @dents=$self->tags();
  84         }
  85         else
  86         {
  87             @dents=(qw(AND OR TRACKS NOARTIST),
  88                     $self->artists());
  89         }
  90     }
  91     elsif($state==$STATE_BOOLEAN)
  92     {
  93         my $parent=$self->tail();
  94         unless(defined($parent) &&
  95                ref($parent) eq "ID3FS::PathElement::Boolean" &&
  96                $parent->{name} eq "NOT")
  97         {
  98             push(@dents, "NOT");
  99         }
 100         push(@dents, $self->tags());
 101     }
 102     elsif($state==$STATE_ROOT)
 103     {
 104         @dents=(qw(ALL NOT), $self->tags());
 105     }
 106     elsif($state==$STATE_ALBUMS)
 107     {
 108         @dents=(qw(TRACKS NOALBUM),$self->albums());
 109     }
 110     elsif($state==$STATE_TRACKLIST)
 111     {
 112         @dents=$self->tracks();
 113     }
 114     else
 115     {
 116         print "DIRENTS: UNHANDLED STATE: $state\n";
 117     }
 118     return(@dents);
 119 }
 120
 121 sub parse
 122 {
 123     my($self)=@_;
 124     @{$self->{components}}=split(/\//, $self->{path});
 125     shift @{$self->{components}}; # drop empty field before leading /
 126 #    print "PATH: $self->{path}\n";
 127     $self->state($STATE_ROOT);
 128     return if($self->{path} eq "/");
 129     my @parts=@{$self->{components}};
 130     my($tag, $tagval);
 131     $self->{elements}=[];
 132     while(my $name=shift @parts)
 133     {
 134 #       print "NAME: $name\n";
 135         my $state=$self->state();
 136         if($state==$STATE_INVALID)
 137         {
 138 #           print "SM: INVALID: $name\n";
 139             return;
 140         }
 141         elsif($state==$STATE_ROOT)
 142         {
 143 #           print "SM: ROOT: $name\n";
 144             if($name eq "ALL")
 145             {
 146                 $self->state($STATE_TAG);
 147             }
 148             elsif($name eq "NOT")
 149             {
 150                 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
 151                 $self->state($STATE_BOOLEAN);
 152             }
 153             else
 154             {
 155                 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 156                 if($tag)
 157                 {
 158                     push(@{$self->{elements}}, $tag);
 159                     $self->state($STATE_TAG);
 160                 }
 161                 else
 162                 {
 163                     $self->state($STATE_INVALID);
 164                 }
 165             }
 166         }
 167         elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
 168         {
 169 #           print "SM: TAG/TAGVAL($state): $name\n";
 170             my $tag=$self->tail();
 171             if($state==$STATE_TAG &&
 172                defined($tag) &&
 173                ref($tag) eq "ID3FS::PathElement::Tag" &&
 174                $self->{db}->tag_has_values($tag->{id}))
 175             {
 176 #               print "Parsing: parent: $tag->{id}\n";
 177                 my $tagval=ID3FS::PathElement::Tag->new($self->{db}, $name, $tag->{id});
 178                 if(defined($tagval))
 179                 {
 180                     $self->state($STATE_TAGVAL);
 181                     # stay in tag state
 182                     push(@{$self->{elements}}, $tagval);
 183                 }
 184                 else
 185                 {
 186                     $self->state($STATE_INVALID);
 187                 }
 188             }
 189             elsif($name eq "TRACKS")
 190             {
 191                 $self->state($STATE_TRACKLIST);
 192             }
 193             elsif($name eq "NOARTIST")
 194             {
 195                 $self->state($STATE_TRACKLIST);
 196             }
 197             elsif($name eq "AND")
 198             {
 199                 $self->state($STATE_BOOLEAN);
 200                 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
 201             }
 202             elsif($name eq "OR")
 203             {
 204                 $self->state($STATE_BOOLEAN);
 205                 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
 206             }
 207             else
 208             {
 209                 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
 210                 if($artist)
 211                 {
 212                     push(@{$self->{elements}}, $artist);
 213                     $self->state($STATE_ALBUMS);
 214                 }
 215                 else
 216                 {
 217                     $self->state($STATE_INVALID);
 218                 }
 219             }
 220         }
 221         elsif($state==$STATE_BOOLEAN)
 222         {
 223 #           print "SM: BOOLEAN: $name\n";
 224             my $parent=$self->tail();
 225             my $allownot=1;
 226             if(defined($parent) &&
 227                ref($parent) eq "ID3FS::PathElement::Boolean" &&
 228                $parent->{name} eq "NOT")
 229             {
 230                 $allownot=0;
 231             }
 232             if($allownot && $name eq "NOT")
 233             {
 234                 $self->state($STATE_BOOLEAN);
 235                 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
 236             }
 237             else
 238             {
 239                 my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 240                 if($tag)
 241                 {
 242                     push(@{$self->{elements}}, $tag);
 243                     $self->state($STATE_TAG);
 244                 }
 245                 else
 246                 {
 247                     $self->state($STATE_INVALID);
 248                 }
 249             }
 250         }
 251         elsif($state==$STATE_ALBUMS)
 252         {
 253 #           print "SM: ALBUM: $name\n";
 254             if($name eq "TRACKS")
 255             {
 256                 $self->state($STATE_TRACKLIST);
 257             }
 258             elsif($name eq "NOALBUM")
 259             {
 260                 $self->state($STATE_TRACKLIST);
 261             }
 262             else
 263             {
 264                 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
 265                 if($album)
 266                 {
 267                     push(@{$self->{elements}}, $album);
 268                     $self->state($STATE_TRACKLIST);
 269                 }
 270                 else
 271                 {
 272                     $self->state($STATE_INVALID);
 273                 }
 274             }
 275         }
 276         elsif($state==$STATE_TRACKLIST)
 277         {
 278 #           print "SM: TRACKLIST: $name\n";
 279             my $track=ID3FS::PathElement::File->new($self->{db}, $name);
 280             if($track)
 281             {
 282                 push(@{$self->{elements}}, $track);
 283                 $self->state($STATE_FILE);
 284             }
 285             else
 286             {
 287                 $self->state($STATE_INVALID);
 288             }
 289         }
 290         elsif($state==$STATE_FILE)
 291         {
 292 #           print "SM: FILE: $name\n";
 293             # Can't have anything after a filename
 294             $self->state($STATE_INVALID);
 295         }
 296         else
 297         {
 298             print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
 299             $self->state($STATE_INVALID);
 300         }
 301     }
 302     # remove trailing boolean
 303     my @elements=@{$self->{elements}};
 304     pop @elements if(@elements && ref($elements[$#elements]) eq "ID3FS::PathElement::Boolean");
 305     # sort elements by precedence
 306     @elements=$self->sort_elements(@elements);
 307     $self->{tagtree}=$self->elements_to_tree(@elements);
 308     if($self->{tagtree})
 309     {
 310         ($self->{sqlconditions},
 311          $self->{andsneeded}) = $self->{tagtree}->to_sql();
 312 #       print("SQL CONDITION(", $self->{andsneeded}, "): ",
 313 #             $self->{sqlconditions}, "\n");
 314 #       use Data::Dumper;
 315 #       print Dumper $self->{tagtree};
 316     }
 317 }
 318
 319 sub state
 320 {
 321     my($self, $newstate)=@_;
 322     $self->{state}=$newstate if(defined($newstate));
 323     return $self->{state};
 324 }
 325
 326 sub elements_to_tree
 327 {
 328     my($self, @elements)=@_;
 329     return undef unless(@elements);
 330     my ($left, $right, $op)=(undef, undef, undef);
 331     my $thing=pop @elements;
 332     if(ref($thing) eq "ID3FS::PathElement::Boolean")
 333     {
 334         my $op=$thing;
 335         $right=$self->elements_to_tree(@elements);
 336         if($op->{name} ne "NOT")
 337         {
 338             $left=$self->elements_to_tree(@elements);
 339         }
 340         return ID3FS::Path::Node->new($left, $op, $right);
 341     }
 342     else
 343     {
 344         return ID3FS::Path::Node->new($thing);
 345     }
 346 }
 347
 348 # Dijkstra's shunting-yard algorithm
 349 sub sort_elements
 350 {
 351     my ($self, @input)=@_;
 352     my @opstack=();
 353     my @output=();
 354 #    print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
 355     while(my $thing = shift @input)
 356     {
 357         if(ref($thing) eq "ID3FS::PathElement::Tag")
 358         {
 359             push(@output, $thing);
 360         }
 361         elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
 362         {
 363             # bool
 364             while(@opstack &&
 365                   ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
 366             {
 367                 push(@output, pop(@opstack));
 368             }
 369             push(@opstack, $thing);
 370         }
 371     }
 372     while(@opstack)
 373     {
 374         push(@output, pop(@opstack));
 375     }
 376 #    print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
 377     return @output;
 378 }
 379
 380 sub used_tags
 381 {
 382     my($self)=@_;
 383     print "TAGTREE UNDEF\n" unless(defined($self->{tagtree}));
 384     return undef unless(defined($self->{tagtree}));
 385     return($self->{tagtree}->used_tags());
 386 }
 387
 388 sub tag_has_values
 389 {
 390     my($self)=@_;
 391     my $tail=$self->tail();
 392     print "TAIL: ", ref($tail), "\n";
 393     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 394     {
 395         return($self->{db}->tag_has_values($tail->{id}));
 396     }
 397 }
 398
 399 sub trailing_tag_id
 400 {
 401     my($self)=@_;
 402     my $tail=$self->tail();
 403     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 404     {
 405         return($tail->{id});
 406     }
 407     return undef;
 408 }
 409
 410 sub trailing_tag_parent
 411 {
 412     my($self)=@_;
 413     my $tail=$self->tail();
 414     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 415     {
 416         return($tail->{parents_id});
 417     }
 418     return undef;
 419 }
 420
 421 sub tail
 422 {
 423     my($self)=@_;
 424     return($self->{elements}->[$#{$self->{elements}}]);
 425 }
 426
 427 # the one before last
 428 sub tail_parent
 429 {
 430     my($self)=@_;
 431     return($self->{elements}->[($#{$self->{elements}}) - 1]);
 432 }
 433
 434 ######################################################################
 435
 436 sub tags
 437 {
 438     my($self)=@_;
 439     if(!@{$self->{elements}}) # /
 440     {
 441         my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
 442         return($self->{db}->cmd_firstcol($sql));
 443     }
 444     my $hasvals=$self->tag_has_values();
 445     my $parent=$self->trailing_tag_parent();
 446     print "THASVALS: $hasvals\n";
 447     print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
 448     my @ids=();
 449     my $sql=("SELECT tags.name FROM (\n" .
 450              $self->tags_subselect() .
 451              ") AS subselect\n" .
 452              "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
 453              "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
 454     my (@allused)=$self->used_tags();
 455     my @used=grep { ref($_) ne "ARRAY"; } @allused;
 456     my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
 457     print "tags(): USED: ", join(", ", @used), "\n";
 458     print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
 459     my @orclauses=();
 460     my @andclauses=();
 461     my $id=$self->trailing_tag_id();
 462     if($hasvals)
 463     {
 464         print "HAS_VALUES\n";
 465         my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
 466         my $clause="(tags.parents_id='$id'";
 467         if(@values)
 468         {
 469             $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
 470         }
 471         $clause .= ")";
 472         push(@orclauses, $clause);
 473     }
 474     else
 475     {
 476         print "HASNT VALUES\n";;
 477         if(@used)
 478         {
 479             push(@orclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
 480         }
 481         for my $pair (@used_with_vals)
 482         {
 483             push(@orclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
 484         }
 485     }
 486
 487     my $parentclause= "(tags.parents_id='";
 488     if($hasvals)
 489     {
 490         $parentclause .= $id;
 491     }
 492     elsif($parent)
 493     {
 494         $parentclause .= $parent;
 495     }
 496     $parentclause .= "')";
 497     push(@andclauses, $parentclause);
 498
 499     if(@orclauses)
 500     {
 501         push(@andclauses, join(' OR ', @orclauses));
 502     }
 503     if(@andclauses)
 504     {
 505         $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
 506     }
 507     $sql .= "GROUP BY tags.name;";
 508     print "SQL: $sql\n";
 509     my @tagnames=$self->{db}->cmd_firstcol($sql);
 510     print "SUBNAMES: ", join(', ', @tagnames), "\n";
 511     return(@tagnames);
 512 }
 513
 514 sub tag_values
 515 {
 516     my($self, $tagid)=@_;
 517     my $sql=("SELECT DISTINCT name FROM tags\n" .
 518              "WHERE parents_id=?");
 519     my @tags=$self->{db}->cmd_firstcol($sql, $tagid);
 520     @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
 521     return @tags;
 522 }
 523
 524 sub artists
 525 {
 526     my($self)=@_;
 527     if(!@{$self->{elements}}) # /ALL
 528     {
 529         my $sql="SELECT DISTINCT name FROM artists;";
 530         return($self->{db}->cmd_firstcol($sql));
 531     }
 532     my @ids=();
 533     my $sql=("SELECT artists.name FROM (\n" .
 534              $self->tags_subselect() .
 535              ") AS subselect\n" .
 536              "INNER JOIN files ON subselect.files_id=files.id\n" .
 537              "INNER JOIN artists ON files.artists_id=artists.id\n" .
 538              "GROUP BY artists.name;");
 539     print "SQL: $sql\n";
 540     my @tagnames=$self->{db}->cmd_firstcol($sql);
 541     print "ARTISTS: ", join(', ', @tagnames), "\n";
 542     return(@tagnames);
 543 }
 544
 545 sub albums
 546 {
 547     my($self)=@_;
 548     my @ids=();
 549     my $tail=$self->tail();
 550     # FIXME: rework PathElements
 551     if(ref($tail) eq "ID3FS::PathElement::Artist")
 552     {
 553         return $self->artist_albums($tail->{id});
 554     }
 555     my $sql=("SELECT albums.name\n" .
 556              "\tFROM (\n" .
 557              $self->tags_subselect() .
 558              "\t) AS subselect\n" .
 559              "INNER JOIN files ON subselect.files_id=files.id\n" .
 560              "INNER JOIN albums ON files.albums_id=albums.id\n" .
 561              "GROUP BY albums.name;");
 562     print "SQL(ALBUMS): \n$sql\n";
 563     my @names=$self->{db}->cmd_firstcol($sql);
 564     print "ALBUMS: ", join(', ', @names), "\n";
 565     return(@names);
 566 }
 567
 568 sub artist_albums
 569 {
 570     my($self, $artist_id)=@_;
 571     my $sql=("SELECT albums.name FROM (\n" .
 572              $self->tags_subselect() .
 573              "\t) AS subselect\n" .
 574              "INNER JOIN files ON subselect.files_id=files.id\n" .
 575              "INNER JOIN albums ON albums.id=files.albums_id\n\t" .
 576              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 577              "WHERE artists.id=? and albums.name <> ''\n\t" .
 578              "GROUP BY albums.name\n");
 579     print "ARTIST_ALBUMS SQL: $sql\n";
 580     my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
 581     print "ALBUMS: ", join(', ', @albums), "\n";
 582     return(@albums);
 583 }
 584
 585 sub artist_tracks
 586 {
 587     my($self, $artist_id)=@_;
 588     my $sql=("SELECT files.name FROM (\n" .
 589              $self->tags_subselect() .
 590              "\t) AS subselect\n" .
 591              "INNER JOIN files ON subselect.files_id=files.id\n" .
 592              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 593              "INNER JOIN albums  ON albums.id=files.albums_id\n\t" .
 594              "WHERE artists.id=? AND albums.name=''\n\t" .
 595              "GROUP BY files.name\n");
 596     print "ARTIST_TRACKS SQL: $sql\n";
 597     my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
 598     print "ARTISTTRACKS: ", join(', ', @names), "\n";
 599     return(@names);
 600 }
 601
 602 sub album_tracks
 603 {
 604     my($self, $artist_id, $album_id)=@_;
 605     my $sql=("SELECT files.name FROM files\n\t" .
 606              "INNER JOIN albums  ON albums.id=files.albums_id\n\t" .
 607              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 608              "WHERE artists.id=? AND albums.id=?\n\t" .
 609              "GROUP BY files.name\n");
 610     print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
 611     my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
 612     print "TRACKS: ", join(', ', @names), "\n";
 613     return(@names);
 614 }
 615
 616 sub tracks
 617 {
 618     my($self)=@_;
 619     # FIXME: rework PathElements
 620     my $tail=$self->tail();
 621     if(ref($tail) eq "ID3FS::PathElement::Artist")
 622     {
 623         return $self->artist_tracks($tail->{id});
 624     }
 625     elsif(ref($tail) eq "ID3FS::PathElement::Album")
 626     {
 627         my $artist_id=0;
 628         my $artist=$self->tail_parent();
 629         if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
 630         {
 631             # should always happen
 632             $artist_id=$artist->{id};
 633         }
 634         return $self->album_tracks($artist_id, $tail->{id});
 635     }
 636
 637     my $sql=("SELECT files.name\n" .
 638              "\tFROM (\n" .
 639              $self->tags_subselect() .
 640              "\t) AS subselect\n" .
 641              "INNER JOIN files ON files.id=subselect.files_id\n" .
 642              "GROUP BY files.name;");
 643     print "SQL: $sql\n";
 644     my @names=$self->{db}->cmd_firstcol($sql);
 645     print "TRACKS: ", join(', ', @names), "\n";
 646     return(@names);
 647 }
 648
 649 sub filename
 650 {
 651     my($self, $mountpoint)=@_;
 652     my $tail=$self->tail();
 653     if(ref($tail) eq "ID3FS::PathElement::File")
 654     {
 655         my $id=$tail->{id};
 656         my $sql=("SELECT paths.name, files.name FROM files\n" .
 657                  "INNER JOIN paths ON files.paths_id=paths.id\n" .
 658                  "WHERE files.id=?\n" .
 659                  "GROUP BY paths.name, files.name");
 660         print "FILENAME SQL: $sql\n";
 661         my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
 662         my $id3fs_path=join('/', map { $_->{name}; }  @{$self->{elements}});
 663         return($self->{db}->relativise($path, $name, $mountpoint, $id3fs_path));
 664     }
 665     die("DB::filename: unhandled case\n"); #FIXME
 666 }
 667
 668 sub tags_subselect
 669 {
 670     my($self)=@_;
 671     my $tree=$self->{tagtree};
 672     my $hasvals=$self->tag_has_values();
 673     my $parent=$self->trailing_tag_parent();
 674
 675     my $tag=undef;
 676     if($hasvals)
 677     {
 678         $tag=$self->trailing_tag_id();
 679         print "Trailing id: $tag\n";
 680     }
 681     my ($sqlclause, $joinsneeded)=(undef, 1);
 682     ($sqlclause, $joinsneeded) = $tree->to_sql($tag) if($tree);
 683     print "SQL($joinsneeded): $sqlclause\n";
 684     my $sql="\tSELECT fxt1.files_id FROM tags t1";
 685     my @crosses=();
 686     my @inners=();
 687 #    $joinsneeded++ if($tag);
 688     for(my $i=1; $i <= $joinsneeded; $i++)
 689     {
 690         if($i > 1)
 691         {
 692             push(@crosses, "CROSS JOIN tags t$i");
 693         }
 694         my $inner=("\tINNER JOIN files_x_tags fxt$i ON " .
 695                    "t${i}.id=fxt${i}.tags_id");
 696         if($i>2)
 697         {
 698             $inner .= " AND fxt1.files_id=fxt${i}.files_id";
 699         }
 700         push(@inners, $inner);
 701     }
 702     $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
 703     $sql .= ("\n" . join("\n", @inners)) if(@inners);
 704     $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
 705 #    if($tag)
 706 #    {
 707 #       $sql .= " AND t${joinsneeded}.parents_id='$tag'";
 708 #    }
 709     $sql .= "\n\tGROUP BY fxt1.files_id\n";
 710     return $sql;
 711 }
 712
 713 sub tags_subselect_and_not
 714 {
 715     my($self,@constraints)=@_;
 716     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 717     my @tags=@$tags;
 718     my @tags_vals=@$tags_vals;;
 719     my $cnt=1;
 720     my @andclauses=();
 721     my $sql='';
 722     for my $tag (@tags)
 723     {
 724         if($cnt == 1)
 725         {
 726             $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
 727             push(@andclauses, "\t\tfxt${cnt}.tags_id=$tag");
 728         }
 729         else
 730         {
 731             $sql .= ("\tLEFT JOIN files_x_tags fxt$cnt ON fxt" .
 732                  ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
 733             push(@andclauses, "\t\tfxt${cnt}.tags_id IS NULL");
 734         }
 735         print "AND: @andclauses\n";
 736         $cnt++;
 737     }
 738     if(@andclauses)
 739     {
 740         $sql .= "\tWHERE\n\t\t";
 741         $sql .= join(" AND\n\t\t", @andclauses) . "\n";
 742     }
 743     $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
 744     return $sql;
 745 }
 746
 747
 748 sub tags_subselect_and
 749 {
 750     my($self,@constraints)=@_;
 751     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 752     my @tags=@$tags;
 753     my @tags_vals=@$tags_vals;;
 754     my $cnt=1;
 755     my @andclauses=();
 756     my $sql='';
 757     for my $tag (@tags)
 758     {
 759         if($cnt == 1)
 760         {
 761             $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
 762         }
 763         else
 764         {
 765             $sql .= ("\tINNER JOIN files_x_tags fxt$cnt ON fxt" .
 766                  ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
 767         }
 768         push(@andclauses, "\t\tfxt${cnt}.tags_id = $tag");
 769         print "AND: @andclauses\n";
 770         $cnt++;
 771     }
 772     if(@andclauses)
 773     {
 774         $sql .= "\tWHERE\n\t\t";
 775         $sql .= join(" AND\n\t\t", @andclauses) . "\n";
 776     }
 777     $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
 778     return $sql;
 779 }
 780
 781 sub tags_subselect_or
 782 {
 783     my($self,@constraints)=@_;
 784     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 785     my @tags=@$tags;
 786     my @tags_vals=@$tags_vals;;
 787
 788     my $sql=("\tSELECT files_x_tags.files_id FROM tags t1\n" .
 789              "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n");
 790     my @orclauses=();
 791     my @andclauses=();
 792     # FIXME: and / or?
 793     if(@tags)
 794     {
 795         push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
 796         push(@andclauses, "( t1.id IN ( " . join(', ', @tags) ." ) )");
 797     }
 798     for my $pair (@tags_vals)
 799     {
 800         my($tag, $val)=@$pair;
 801         push(@orclauses, "( t1.parents_id=$tag AND t1.id=$val )");
 802     }
 803 #    push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
 804     if(@orclauses)
 805     {
 806         push(@andclauses, join("\n\t\tOR ", @orclauses));
 807     }
 808     if(@andclauses)
 809     {
 810         $sql .= "\tWHERE\n\t\t";
 811         $sql .= join("\n\t\tAND ", @andclauses) . "\n";
 812     }
 813     $sql .= "\tGROUP BY files_x_tags.files_id\n";
 814     return $sql;
 815 }
 816
 817 sub constraints_tag_list
 818 {
 819     my($self, @constraints)=@_;
 820     my $lasttag=undef;
 821     my @tags=();
 822     my @tags_vals=();
 823     for my $constraint (@constraints)
 824     {
 825 #       print ref($constraint), ": ", $constraint->{name}, "\n";
 826         if(ref($constraint) eq "ID3FS::PathElement::Tag")
 827         {
 828             if(defined($lasttag))
 829             {
 830 #               print "TAGVAL\n";
 831                 push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
 832                 $lasttag=undef;
 833             }
 834             elsif($self->tag_has_values($constraint->{id}))
 835             {
 836 #               print "HASVALUES\n";
 837                 $lasttag=$constraint->{id} if defined($constraint->{id});
 838             }
 839             else
 840             {
 841 #               print "NOVALUES\n";
 842                 push(@tags, $constraint->{id}) if(defined($constraint->{id}));
 843             }
 844         }
 845     }
 846     unless($self->{db}->{postgres})
 847     {
 848         @tags=map{ "\"$_\""; } @tags;
 849         @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
 850         $lasttag="\"$lasttag\"" if defined($lasttag);
 851     }
 852     return(\@tags, \@tags_vals, $lasttag);
 853 }
 854
 855
 856 sub bare_tags
 857 {
 858     my($self)=@_;
 859     my $sql=("SELECT tags.name FROM tags\n" .
 860              "WHERE tags.parents_id=''\n" .
 861              "GROUP BY tags.name\n");
 862     my @names=$self->{db}->cmd_firstcol($sql);
 863     return (@names);
 864 }
 865
 866 sub tags_with_values
 867 {
 868     # FIXME: only shows one level of tag depth
 869     my($self)=@_;
 870     my $sql=("SELECT p.name, t.name  FROM tags t\n" .
 871              "INNER JOIN tags p ON t.parents_id=p.id\n" .
 872              "GROUP BY p.name, t.name\n");
 873     print "SQL: $sql\n";
 874     my $result=$self->{db}->cmd_rows($sql);
 875     my $tags={};
 876     for my $pair (@$result)
 877     {
 878         push(@{$tags->{$pair->[0]}}, $pair->[1]);
 879     }
 880     return $tags;
 881 }
 882
 883 sub lookup_id
 884 {
 885     my($self, $table, $name)=@_;
 886     my($id)=$self->{db}->cmd_onerow("SELECT id FROM $table where name=?", $name);
 887     return $id;
 888 }
 889
 890 1;