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
  12 our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
  13      $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
  14      $STATE_FILE)=(0..7);
  15
  16 sub new
  17 {
  18     my $proto=shift;
  19     my $class=ref($proto) || $proto;
  20     my $self={};
  21     bless($self,$class);
  22
  23     $self->{db}=shift;
  24     $self->{path}=shift;
  25     $self->parse();
  26     print "STATE: ", $self->state(), "\n";
  27     return $self;
  28 }
  29
  30 sub isdir
  31 {
  32     my($self)=@_;
  33     if(($self->state() == $STATE_FILE) ||
  34        ($self->state() == $STATE_INVALID))
  35     {
  36         return 0;
  37     }
  38     return 1;
  39 }
  40
  41 sub isfile
  42 {
  43     my($self)=@_;
  44     return 1 if($self->state() == $STATE_FILE);
  45     return 0;
  46 }
  47
  48 sub isvalid
  49 {
  50     my($self)=@_;
  51     return($self->state() != $STATE_INVALID);
  52 }
  53
  54 sub dest
  55 {
  56     my($self)=@_;
  57     if($self->state() == $STATE_FILE)
  58     {
  59         return $self->{db}->filename(@{$self->{elements}});
  60     }
  61     return "ERROR"; #should never happen?
  62 }
  63
  64 sub dirents
  65 {
  66     my($self)=@_;
  67     my @dents=();
  68     my $state=$self->state();
  69     print "DIRENTS: STATE: $state\n";
  70     if($state==$STATE_TAG || $state==$STATE_TAGVAL)
  71     {
  72         my $tag=$self->{elements}->[$#{$self->{elements}}];
  73         if($state==$STATE_TAG &&
  74            defined($tag) &&
  75            ref($tag) eq "ID3FS::PathElement::Tag" &&
  76            $self->{db}->tag_has_values($tag->{id}))
  77         {
  78             print "DIRENTS: TAG: TAGVALUES\n";
  79             @dents=$self->{db}->tag_values($tag->{id});
  80         }
  81         else
  82         {
  83             print "DIRENTS: TAG/TAGVAL($state): ARTISTS\n";
  84             @dents=(qw(AND ALLTRACKS), # FIXME: NOT and OR
  85                     $self->{db}->artists(@{$self->{elements}}));
  86         }
  87     }
  88     elsif($state==$STATE_BOOLEAN)
  89     {
  90         @dents=$self->{db}->tags(@{$self->{elements}});
  91     }
  92     elsif($state==$STATE_ROOT)
  93     {
  94         @dents=("ALL", $self->{db}->tags(@{$self->{elements}}));
  95     }
  96     elsif($state==$STATE_ALBUMS)
  97     {
  98         @dents=("TRACKS", $self->{db}->albums(@{$self->{elements}}));
  99     }
 100     elsif($state==$STATE_TRACKLIST)
 101     {
 102         @dents=$self->{db}->tracks(@{$self->{elements}});
 103     }
 104     else
 105     {
 106         print "DIRENTS: UNHANDLED STATE: $state\n";
 107     }
 108     return(@dents);
 109 }
 110
 111 sub parse
 112 {
 113     my($self)=@_;
 114     @{$self->{components}}=split(/\//, $self->{path});
 115     shift @{$self->{components}}; # drop empty field before leading /
 116     print "PATH: $self->{path}\n";
 117 #    print "COMPONENTS: ", join(' | ', @{$self->{components}}), "\n";
 118     $self->state($STATE_ROOT);
 119     return if($self->{path} eq "/");
 120     my @parts=@{$self->{components}};
 121     my($tag, $tagval);
 122     $self->{elements}=[];
 123     while(my $name=shift @parts)
 124     {
 125         print "NAME: $name\n";
 126         my $state=$self->state();
 127         if($state==$STATE_INVALID)
 128         {
 129             print "SM: INVALID: $name\n";
 130             return;
 131         }
 132         elsif($state==$STATE_ROOT)
 133         {
 134             print "SM: ROOT: $name\n";
 135             if($name eq "ALL")
 136             {
 137                 $self->state($STATE_TAG);
 138             }
 139             else
 140             {
 141                 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 142                 if($tag)
 143                 {
 144                     push(@{$self->{elements}}, $tag);
 145                     $self->state($STATE_TAG);
 146                 }
 147                 else
 148                 {
 149                     $self->state($STATE_INVALID);
 150                 }
 151             }
 152         }
 153         elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
 154         {
 155             print "SM: TAG/TAGVAL($state): $name\n";
 156             my $tag=$self->{elements}->[$#{$self->{elements}}];
 157             if($state==$STATE_TAG &&
 158                defined($tag) &&
 159                ref($tag) eq "ID3FS::PathElement::Tag" &&
 160                $self->{db}->tag_has_values($tag->{id}))
 161             {
 162                 my $tagval=ID3FS::PathElement::Tagval->new($name);
 163                 if(defined($tagval))
 164                 {
 165                     $self->state($STATE_TAGVAL);
 166                     # stay in tag state
 167                     push(@{$self->{elements}}, $tagval);
 168                 }
 169                 else
 170                 {
 171                     $self->state($STATE_INVALID);
 172                 }
 173             }
 174             elsif($name eq "ALLTRACKS")
 175             {
 176                 $self->state($STATE_TRACKLIST);
 177             }
 178             elsif($name eq "AND")
 179             {
 180                 $self->state($STATE_BOOLEAN);
 181 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 182             }
 183             elsif($name eq "OR")
 184             {
 185                 $self->state($STATE_BOOLEAN);
 186 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 187             }
 188             elsif($name eq "NOT")
 189             {
 190                 $self->state($STATE_TAG);
 191 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 192             }
 193             else
 194             {
 195                 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
 196                 if($artist)
 197                 {
 198                     push(@{$self->{elements}}, $artist);
 199                     $self->state($STATE_ALBUMS);
 200                 }
 201                 else
 202                 {
 203                     $self->state($STATE_INVALID);
 204                 }
 205             }
 206         }
 207         elsif($state==$STATE_BOOLEAN)
 208         {
 209             print "SM: BOOLEAN: $name\n";
 210             my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 211             if($tag)
 212             {
 213                 push(@{$self->{elements}}, $tag);
 214                 $self->state($STATE_TAG);
 215                 }
 216             else
 217             {
 218                 $self->state($STATE_INVALID);
 219             }
 220         }
 221         elsif($state==$STATE_ALBUMS)
 222         {
 223             print "SM: ALBUM: $name\n";
 224             if($name eq "TRACKS")
 225             {
 226                 $self->state($STATE_TRACKLIST);
 227             }
 228             else
 229             {
 230                 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
 231                 if($album)
 232                 {
 233                     push(@{$self->{elements}}, $album);
 234                     $self->state($STATE_TRACKLIST);
 235                 }
 236                 else
 237                 {
 238                     $self->state($STATE_INVALID);
 239                 }
 240             }
 241         }
 242         elsif($state==$STATE_TRACKLIST)
 243         {
 244             print "SM: TRACKLIST: $name\n";
 245             my $track=ID3FS::PathElement::File->new($self->{db}, $name);
 246             push(@{$self->{elements}}, $track);
 247             if($track)
 248             {
 249                 push(@{$self->{elements}}, $track);
 250                 $self->state($STATE_FILE);
 251             }
 252             else
 253             {
 254                 $self->state($STATE_INVALID);
 255             }
 256         }
 257         elsif($state==$STATE_FILE)
 258         {
 259             print "SM: FILE: $name\n";
 260             # Can't have anything after a filename
 261             $self->state($STATE_INVALID);
 262         }
 263         else
 264         {
 265             print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
 266             $self->state($STATE_INVALID);
 267         }
 268     }
 269 }
 270
 271 sub state
 272 {
 273     my($self, $newstate)=@_;
 274     $self->{state}=$newstate if(defined($newstate));
 275     return $self->{state};
 276 }
 277
 278 1;