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->{elements}->[$#{$self->{elements}}];
  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->{elements}->[$#{$self->{elements}}];
  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->{elements}->[$#{$self->{elements}}];
 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->{elements}->[$#{$self->{elements}}];
 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 #           print "Pushing $thing->{name} to output\n";
 360             push(@output, $thing);
 361 #           print "OPSTACK: ", join(', ', map { $_->{name}; } @opstack), "\n";
 362 #           print "OUTPUT: ", join(', ', map { $_->{name}; } @output), "\n";
 363         }
 364         elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
 365         {
 366 #           print "BOOL: $thing->{name}\n";
 367             # bool
 368 #           print "thing: $thing->{name}: $priorities{$thing->{name}} ";
 369             if(@opstack)
 370             {
 371 #               print("topop: ", $opstack[$#opstack]->{name},
 372 #                     ": ", $priorities{$opstack[$#opstack]->{name}}, "\n");
 373             }
 374             while(@opstack &&
 375                   ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
 376             {
 377 #               print "Pushing ", $opstack[$#opstack]->{name}, " from opstack to output\n";
 378                 push(@output, pop(@opstack));
 379 #               print "OPSTACK: ", join(', ', map { $_->{name}; } @opstack), "\n";
 380 #               print "OUTPUT: ", join(', ', map { $_->{name}; } @output), "\n";
 381             }
 382 #           print "Pushing $thing->{name} to opstack\n";
 383             push(@opstack, $thing);
 384 #           print "OPSTACK: ", join(', ', map { $_->{name}; } @opstack), "\n";
 385 #           print "OUTPUT: ", join(', ', map { $_->{name}; } @output), "\n";
 386         }
 387     }
 388     while(@opstack)
 389     {
 390         push(@output, pop(@opstack));
 391     }
 392 #    print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
 393     return @output;
 394 }
 395
 396 sub used_tags
 397 {
 398     my($self)=@_;
 399     print "TAGTREE UNDEF\n" unless(defined($self->{tagtree}));
 400     return undef unless(defined($self->{tagtree}));
 401     return($self->{tagtree}->used_tags());
 402 }
 403
 404 sub tag_has_values
 405 {
 406     my($self)=@_;
 407     my $tail=$self->{elements}->[$#{$self->{elements}}];
 408     print "TAIL: ", ref($tail), "\n";
 409     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 410     {
 411         return($self->{db}->tag_has_values($tail->{id}));
 412     }
 413 }
 414
 415 sub trailing_tag_id
 416 {
 417     my($self)=@_;
 418     my $tail=$self->{elements}->[$#{$self->{elements}}];
 419     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 420     {
 421         return($tail->{id});
 422     }
 423     return undef;
 424 }
 425
 426 sub trailing_tag_parent
 427 {
 428     my($self)=@_;
 429     my $tail=$self->{elements}->[$#{$self->{elements}}];
 430     if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
 431     {
 432         return($tail->{parents_id});
 433     }
 434     return undef;
 435 }
 436
 437 ######################################################################
 438
 439 sub tags
 440 {
 441     my($self)=@_;
 442     my @constraints=@{$self->{elements}};
 443     if(!@constraints) # /
 444     {
 445         my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
 446         return($self->{db}->cmd_firstcol($sql));
 447     }
 448     my $hasvals=$self->tag_has_values();
 449     my $parent=$self->trailing_tag_parent();
 450     print "THASVALS: $hasvals\n";
 451     print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
 452     my @ids=();
 453     my $sql=("SELECT tags.name FROM (\n" .
 454              $self->tags_subselect() .
 455              ") AS subselect\n" .
 456              "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
 457              "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
 458     my (@allused)=$self->used_tags();
 459     my @used=grep { ref($_) ne "ARRAY"; } @allused;
 460     my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
 461     print "tags(): USED: ", join(", ", @used), "\n";
 462     print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
 463     my @orclauses=();
 464     my @andclauses=();
 465     my $id=$self->trailing_tag_id();
 466     if($hasvals)
 467     {
 468         print "HAS_VALUES\n";
 469         my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
 470         my $clause="(tags.parents_id='$id'";
 471         if(@values)
 472         {
 473             $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
 474         }
 475         $clause .= ")";
 476         push(@orclauses, $clause);
 477     }
 478     else
 479     {
 480         print "HASNT VALUES\n";;
 481         if(@used)
 482         {
 483             push(@orclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
 484         }
 485         for my $pair (@used_with_vals)
 486         {
 487             push(@orclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
 488         }
 489     }
 490
 491     my $parentclause= "(tags.parents_id='";
 492     if($hasvals)
 493     {
 494         $parentclause .= $id;
 495     }
 496     elsif($parent)
 497     {
 498         $parentclause .= $parent;
 499     }
 500     $parentclause .= "')";
 501     push(@andclauses, $parentclause);
 502
 503     if(@orclauses)
 504     {
 505         push(@andclauses, join(' OR ', @orclauses));
 506     }
 507     if(@andclauses)
 508     {
 509         $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
 510     }
 511     $sql .= "GROUP BY tags.name;";
 512     print "SQL: $sql\n";
 513     my @tagnames=$self->{db}->cmd_firstcol($sql);
 514     print "SUBNAMES: ", join(', ', @tagnames), "\n";
 515     return(@tagnames);
 516 }
 517
 518 sub tag_values
 519 {
 520     my($self, $tagid)=@_;
 521     my $sql=("SELECT DISTINCT name FROM tags\n" .
 522              "WHERE parents_id=?");
 523     my @tags=$self->{db}->cmd_firstcol($sql, $tagid);
 524     @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
 525     return @tags;
 526 }
 527
 528 sub artists
 529 {
 530     my($self)=@_;
 531     my @constraints=@{$self->{elements}};
 532     if(!@constraints) # /ALL
 533     {
 534         my $sql="SELECT DISTINCT name FROM artists;";
 535         return($self->{db}->cmd_firstcol($sql));
 536     }
 537     my @ids=();
 538     my $sql=("SELECT artists.name FROM (\n" .
 539              $self->tags_subselect() .
 540              ") AS subselect\n" .
 541              "INNER JOIN files ON subselect.files_id=files.id\n" .
 542              "INNER JOIN artists ON files.artists_id=artists.id\n" .
 543              "GROUP BY artists.name;");
 544     print "SQL: $sql\n";
 545     my @tagnames=$self->{db}->cmd_firstcol($sql);
 546     print "ARTISTS: ", join(', ', @tagnames), "\n";
 547     return(@tagnames);
 548 }
 549
 550 sub albums
 551 {
 552     my($self)=@_;
 553     my @constraints=@{$self->{elements}};
 554     my @ids=();
 555     # FIXME: rework PathElements
 556     if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Artist")
 557     {
 558         return $self->artist_albums($constraints[$#constraints]->{id});
 559     }
 560     my $sql=("SELECT albums.name\n" .
 561              "\tFROM (\n" .
 562              $self->tags_subselect() .
 563              "\t) AS subselect\n" .
 564              "INNER JOIN files ON subselect.files_id=files.id\n" .
 565              "INNER JOIN albums ON files.albums_id=albums.id\n" .
 566              "GROUP BY albums.name;");
 567     print "SQL(ALBUMS): \n$sql\n";
 568     my @names=$self->{db}->cmd_firstcol($sql);
 569     print "ALBUMS: ", join(', ', @names), "\n";
 570     return(@names);
 571 }
 572
 573 sub artist_albums
 574 {
 575     my($self, $artist_id)=@_;
 576     my @constraints=@{$self->{elements}};
 577     my $sql=("SELECT albums.name FROM (\n" .
 578              $self->tags_subselect() .
 579              "\t) AS subselect\n" .
 580              "INNER JOIN files ON subselect.files_id=files.id\n" .
 581              "INNER JOIN albums ON albums.id=files.albums_id\n\t" .
 582              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 583              "WHERE artists.id=? and albums.name <> ''\n\t" .
 584              "GROUP BY albums.name\n");
 585     print "ARTIST_ALBUMS SQL: $sql\n";
 586     my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
 587     print "ALBUMS: ", join(', ', @albums), "\n";
 588     return(@albums);
 589 }
 590
 591 sub artist_tracks
 592 {
 593     my($self, $artist_id)=@_;
 594     my $sql=("SELECT files.name FROM (\n" .
 595              $self->tags_subselect() .
 596              "\t) AS subselect\n" .
 597              "INNER JOIN files ON subselect.files_id=files.id\n" .
 598              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 599              "INNER JOIN albums  ON albums.id=files.albums_id\n\t" .
 600              "WHERE artists.id=? AND albums.name=''\n\t" .
 601              "GROUP BY files.name\n");
 602     print "ARTIST_TRACKS SQL: $sql\n";
 603     my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
 604     print "ARTISTTRACKS: ", join(', ', @names), "\n";
 605     return(@names);
 606 }
 607
 608 sub album_tracks
 609 {
 610     my($self, $artist_id, $album_id)=@_;
 611     my $sql=("SELECT files.name FROM files\n\t" .
 612              "INNER JOIN albums  ON albums.id=files.albums_id\n\t" .
 613              "INNER JOIN artists ON artists.id=files.artists_id\n\t" .
 614              "WHERE artists.id=? AND albums.id=?\n\t" .
 615              "GROUP BY files.name\n");
 616     print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
 617     my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
 618     print "TRACKS: ", join(', ', @names), "\n";
 619     return(@names);
 620 }
 621
 622 sub tracks
 623 {
 624     my($self)=@_;
 625     my @constraints=@{$self->{elements}};
 626     # FIXME: rework PathElements
 627     if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Artist")
 628     {
 629         my $artist_id=0;
 630         my $artist=$constraints[$#constraints];
 631         if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
 632         {
 633             # should always happen
 634             $artist_id=$artist->{id};
 635         }
 636         return $self->artist_tracks($artist_id);
 637     }
 638     elsif(ref($constraints[$#constraints]) eq "ID3FS::PathElement::Album")
 639     {
 640         my $artist_id=0;
 641         my $artist=$constraints[($#constraints)-1];
 642         if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
 643         {
 644             # should always happen
 645             $artist_id=$artist->{id};
 646         }
 647         return $self->album_tracks($artist_id, $constraints[$#constraints]->{id});
 648     }
 649
 650     my $sql=("SELECT files.name\n" .
 651              "\tFROM (\n" .
 652              $self->tags_subselect() .
 653              "\t) AS subselect\n" .
 654              "INNER JOIN files ON files.id=subselect.files_id\n" .
 655              "GROUP BY files.name;");
 656     print "SQL: $sql\n";
 657     my @names=$self->{db}->cmd_firstcol($sql);
 658     print "TRACKS: ", join(', ', @names), "\n";
 659     return(@names);
 660 }
 661
 662 sub filename
 663 {
 664     my($self, $mountpoint)=@_;
 665     my @constraints=@{$self->{elements}};
 666     if(ref($constraints[$#constraints]) eq "ID3FS::PathElement::File")
 667     {
 668         my $id=$constraints[$#constraints]->{id};
 669         my $sql=("SELECT paths.name, files.name FROM files\n" .
 670                  "INNER JOIN paths ON files.paths_id=paths.id\n" .
 671                  "WHERE files.id=?\n" .
 672                  "GROUP BY paths.name, files.name");
 673         print "FILENAME SQL: $sql\n";
 674         my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
 675         my $id3fs_path=join('/', map { $_->{name}; }  @constraints);
 676         return($self->{db}->relativise($path, $name, $mountpoint, $id3fs_path));
 677     }
 678     die("DB::filename: unhandled case\n"); #FIXME
 679 }
 680
 681 sub tags_subselect
 682 {
 683     my($self)=@_;
 684     my $tree=$self->{tagtree};
 685     my $hasvals=$self->tag_has_values();
 686     my $parent=$self->trailing_tag_parent();
 687
 688     my $tag=undef;
 689     if($hasvals)
 690     {
 691         $tag=$self->trailing_tag_id();
 692         print "Trailing id: $tag\n";
 693     }
 694     my ($sqlclause, $joinsneeded)=(undef, 1);
 695     ($sqlclause, $joinsneeded) = $tree->to_sql($tag) if($tree);
 696     print "SQL($joinsneeded): $sqlclause\n";
 697     my $sql="\tSELECT fxt1.files_id FROM tags t1";
 698     my @crosses=();
 699     my @inners=();
 700 #    $joinsneeded++ if($tag);
 701     for(my $i=1; $i <= $joinsneeded; $i++)
 702     {
 703         if($i > 1)
 704         {
 705             push(@crosses, "CROSS JOIN tags t$i");
 706         }
 707         my $inner=("\tINNER JOIN files_x_tags fxt$i ON " .
 708                    "t${i}.id=fxt${i}.tags_id");
 709         if($i>2)
 710         {
 711             $inner .= " AND fxt1.files_id=fxt${i}.files_id";
 712         }
 713         push(@inners, $inner);
 714     }
 715     $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
 716     $sql .= ("\n" . join("\n", @inners)) if(@inners);
 717     $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
 718 #    if($tag)
 719 #    {
 720 #       $sql .= " AND t${joinsneeded}.parents_id='$tag'";
 721 #    }
 722     $sql .= "\n\tGROUP BY fxt1.files_id\n";
 723     return $sql;
 724 }
 725
 726 sub tags_subselect_and_not
 727 {
 728     my($self,@constraints)=@_;
 729     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 730     my @tags=@$tags;
 731     my @tags_vals=@$tags_vals;;
 732     my $cnt=1;
 733     my @andclauses=();
 734     my $sql='';
 735     for my $tag (@tags)
 736     {
 737         if($cnt == 1)
 738         {
 739             $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
 740             push(@andclauses, "\t\tfxt${cnt}.tags_id=$tag");
 741         }
 742         else
 743         {
 744             $sql .= ("\tLEFT JOIN files_x_tags fxt$cnt ON fxt" .
 745                  ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
 746             push(@andclauses, "\t\tfxt${cnt}.tags_id IS NULL");
 747         }
 748         print "AND: @andclauses\n";
 749         $cnt++;
 750     }
 751     if(@andclauses)
 752     {
 753         $sql .= "\tWHERE\n\t\t";
 754         $sql .= join(" AND\n\t\t", @andclauses) . "\n";
 755     }
 756     $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
 757     return $sql;
 758 }
 759
 760
 761 sub tags_subselect_and
 762 {
 763     my($self,@constraints)=@_;
 764     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 765     my @tags=@$tags;
 766     my @tags_vals=@$tags_vals;;
 767     my $cnt=1;
 768     my @andclauses=();
 769     my $sql='';
 770     for my $tag (@tags)
 771     {
 772         if($cnt == 1)
 773         {
 774             $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
 775         }
 776         else
 777         {
 778             $sql .= ("\tINNER JOIN files_x_tags fxt$cnt ON fxt" .
 779                  ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
 780         }
 781         push(@andclauses, "\t\tfxt${cnt}.tags_id = $tag");
 782         print "AND: @andclauses\n";
 783         $cnt++;
 784     }
 785     if(@andclauses)
 786     {
 787         $sql .= "\tWHERE\n\t\t";
 788         $sql .= join(" AND\n\t\t", @andclauses) . "\n";
 789     }
 790     $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
 791     return $sql;
 792 }
 793
 794 sub tags_subselect_or
 795 {
 796     my($self,@constraints)=@_;
 797     my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
 798     my @tags=@$tags;
 799     my @tags_vals=@$tags_vals;;
 800
 801     my $sql=("\tSELECT files_x_tags.files_id FROM tags t1\n" .
 802              "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n");
 803     my @orclauses=();
 804     my @andclauses=();
 805     # FIXME: and / or?
 806     if(@tags)
 807     {
 808         push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
 809         push(@andclauses, "( t1.id IN ( " . join(', ', @tags) ." ) )");
 810     }
 811     for my $pair (@tags_vals)
 812     {
 813         my($tag, $val)=@$pair;
 814         push(@orclauses, "( t1.parents_id=$tag AND t1.id=$val )");
 815     }
 816 #    push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
 817     if(@orclauses)
 818     {
 819         push(@andclauses, join("\n\t\tOR ", @orclauses));
 820     }
 821     if(@andclauses)
 822     {
 823         $sql .= "\tWHERE\n\t\t";
 824         $sql .= join("\n\t\tAND ", @andclauses) . "\n";
 825     }
 826     $sql .= "\tGROUP BY files_x_tags.files_id\n";
 827     return $sql;
 828 }
 829
 830 sub constraints_tag_list
 831 {
 832     my($self, @constraints)=@_;
 833     my $lasttag=undef;
 834     my @tags=();
 835     my @tags_vals=();
 836     for my $constraint (@constraints)
 837     {
 838 #       print ref($constraint), ": ", $constraint->{name}, "\n";
 839         if(ref($constraint) eq "ID3FS::PathElement::Tag")
 840         {
 841             if(defined($lasttag))
 842             {
 843 #               print "TAGVAL\n";
 844                 push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
 845                 $lasttag=undef;
 846             }
 847             elsif($self->tag_has_values($constraint->{id}))
 848             {
 849 #               print "HASVALUES\n";
 850                 $lasttag=$constraint->{id} if defined($constraint->{id});
 851             }
 852             else
 853             {
 854 #               print "NOVALUES\n";
 855                 push(@tags, $constraint->{id}) if(defined($constraint->{id}));
 856             }
 857         }
 858     }
 859     unless($self->{db}->{postgres})
 860     {
 861         @tags=map{ "\"$_\""; } @tags;
 862         @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
 863         $lasttag="\"$lasttag\"" if defined($lasttag);
 864     }
 865     return(\@tags, \@tags_vals, $lasttag);
 866 }
 867
 868
 869 sub bare_tags
 870 {
 871     my($self)=@_;
 872     my $sql=("SELECT tags.name FROM tags\n" .
 873              "WHERE tags.parents_id=''\n" .
 874              "GROUP BY tags.name\n");
 875     my @names=$self->{db}->cmd_firstcol($sql);
 876     return (@names);
 877 }
 878
 879 sub tags_with_values
 880 {
 881     # FIXME: only shows one level of tag depth
 882     my($self)=@_;
 883     my $sql=("SELECT p.name, t.name  FROM tags t\n" .
 884              "INNER JOIN tags p ON t.parents_id=p.id\n" .
 885              "GROUP BY p.name, t.name\n");
 886     print "SQL: $sql\n";
 887     my $result=$self->{db}->cmd_rows($sql);
 888     my $tags={};
 889     for my $pair (@$result)
 890     {
 891         push(@{$tags->{$pair->[0]}}, $pair->[1]);
 892     }
 893     return $tags;
 894 }
 895
 896 sub lookup_id
 897 {
 898     my($self, $table, $name)=@_;
 899     my($id)=$self->{db}->cmd_onerow("SELECT id FROM $table where name=?", $name);
 900     return $id;
 901 }
 902
 903 1;