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)
  71     {
  72         my $tag=$self->{elements}->[$#{$self->{elements}}];
  73         if(defined($tag) && (ref($tag) eq "ID3FS::PathElement::Tag") &&
  74            $self->{db}->tag_has_values($tag->{id}))
  75         {
  76             print "DIRENTS: TAG: TAGVALUES\n";
  77             @dents=$self->{db}->tag_values($tag->{id});
  78         }
  79         else
  80         {
  81             print "DIRENTS: TAG: ARTISTS\n";
  82             @dents=(qw(AND ALLTRACKS), # FIXME: NOT and OR
  83                     $self->{db}->artists(@{$self->{elements}}));
  84         }
  85     }
  86     elsif($state==$STATE_BOOLEAN)
  87     {
  88         @dents=$self->{db}->tags(@{$self->{elements}});
  89     }
  90     elsif($state==$STATE_ROOT)
  91     {
  92         @dents=("ALL", $self->{db}->tags(@{$self->{elements}}));
  93     }
  94     elsif($state==$STATE_ALBUMS)
  95     {
  96         @dents=("TRACKS", $self->{db}->albums(@{$self->{elements}}));
  97     }
  98     elsif($state==$STATE_TRACKLIST)
  99     {
 100         @dents=$self->{db}->tracks(@{$self->{elements}});
 101     }
 102     else
 103     {
 104         print "DIRENTS: UNHANDLED STATE: $state\n";
 105     }
 106     return(@dents);
 107 }
 108
 109 sub parse
 110 {
 111     my($self)=@_;
 112     @{$self->{components}}=split(/\//, $self->{path});
 113     shift @{$self->{components}}; # drop empty field before leading /
 114     print "PATH: $self->{path}\n";
 115 #    print "COMPONENTS: ", join(' | ', @{$self->{components}}), "\n";
 116     $self->state($STATE_ROOT);
 117     return if($self->{path} eq "/");
 118     my @parts=@{$self->{components}};
 119     my($tag, $tagval);
 120     $self->{elements}=[];
 121     while(my $name=shift @parts)
 122     {
 123         print "NAME: $name\n";
 124         my $state=$self->state();
 125         if($state==$STATE_INVALID)
 126         {
 127             print "SM: INVALID: $name\n";
 128             return;
 129         }
 130         elsif($state==$STATE_ROOT)
 131         {
 132             print "SM: ROOT: $name\n";
 133             if($name eq "ALL")
 134             {
 135                 $self->state($STATE_TAG);
 136             }
 137             else
 138             {
 139                 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 140                 if($tag)
 141                 {
 142                     push(@{$self->{elements}}, $tag);
 143                     $self->state($STATE_TAG);
 144                 }
 145                 else
 146                 {
 147                     $self->state($STATE_INVALID);
 148                 }
 149             }
 150         }
 151         elsif($state==$STATE_TAG)
 152         {
 153             print "SM: TAG: $name\n";
 154             my $tag=$self->{elements}->[$#{$self->{elements}}];
 155             if(defined($tag) &&
 156                ref($tag) eq "ID3FS::PathElement::Tag" &&
 157                $self->{db}->tag_has_values($tag->{id}))
 158             {
 159                 my $tagval=ID3FS::PathElement::Tagval->new($name);
 160                 if(defined($tagval))
 161                 {
 162                     $self->state($STATE_BOOLEAN);
 163                     push(@{$self->{elements}}, $tagval);
 164                 }
 165                 else
 166                 {
 167                     $self->state($STATE_INVALID);
 168                 }
 169             }
 170             elsif($name eq "ALLTRACKS")
 171             {
 172                 $self->state($STATE_TRACKLIST);
 173             }
 174             elsif($name eq "AND")
 175             {
 176                 $self->state($STATE_BOOLEAN);
 177 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 178             }
 179             elsif($name eq "OR")
 180             {
 181                 $self->state($STATE_BOOLEAN);
 182 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 183             }
 184             elsif($name eq "NOT")
 185             {
 186                 $self->state($STATE_TAG);
 187 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 188             }
 189             else
 190             {
 191                 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
 192                 if($artist)
 193                 {
 194                     push(@{$self->{elements}}, $artist);
 195                     $self->state($STATE_ALBUMS);
 196                 }
 197                 else
 198                 {
 199                     $self->state($STATE_INVALID);
 200                 }
 201             }
 202         }
 203         elsif($state==$STATE_TAGVAL)
 204         {
 205             print "SM: TAGVAL: $name\n";
 206         }
 207         elsif($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;