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             @dents=$self->{db}->tag_values($tag->{id});
  79         }
  80         else
  81         {
  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     $self->state($STATE_ROOT);
 116     return if($self->{path} eq "/");
 117     my @parts=@{$self->{components}};
 118     my($tag, $tagval);
 119     $self->{elements}=[];
 120     while(my $name=shift @parts)
 121     {
 122 #       print "NAME: $name\n";
 123         my $state=$self->state();
 124         if($state==$STATE_INVALID)
 125         {
 126 #           print "SM: INVALID: $name\n";
 127             return;
 128         }
 129         elsif($state==$STATE_ROOT)
 130         {
 131 #           print "SM: ROOT: $name\n";
 132             if($name eq "ALL")
 133             {
 134                 $self->state($STATE_TAG);
 135             }
 136             else
 137             {
 138                 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 139                 if($tag)
 140                 {
 141                     push(@{$self->{elements}}, $tag);
 142                     $self->state($STATE_TAG);
 143                 }
 144                 else
 145                 {
 146                     $self->state($STATE_INVALID);
 147                 }
 148             }
 149         }
 150         elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
 151         {
 152 #           print "SM: TAG/TAGVAL($state): $name\n";
 153             my $tag=$self->{elements}->[$#{$self->{elements}}];
 154             if($state==$STATE_TAG &&
 155                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_TAGVAL);
 163                     # stay in tag state
 164                     push(@{$self->{elements}}, $tagval);
 165                 }
 166                 else
 167                 {
 168                     $self->state($STATE_INVALID);
 169                 }
 170             }
 171             elsif($name eq "ALLTRACKS")
 172             {
 173                 $self->state($STATE_TRACKLIST);
 174             }
 175             elsif($name eq "AND")
 176             {
 177                 $self->state($STATE_BOOLEAN);
 178 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 179             }
 180             elsif($name eq "OR")
 181             {
 182                 $self->state($STATE_BOOLEAN);
 183 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 184             }
 185             elsif($name eq "NOT")
 186             {
 187                 $self->state($STATE_TAG);
 188 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 189             }
 190             else
 191             {
 192                 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
 193                 if($artist)
 194                 {
 195                     push(@{$self->{elements}}, $artist);
 196                     $self->state($STATE_ALBUMS);
 197                 }
 198                 else
 199                 {
 200                     $self->state($STATE_INVALID);
 201                 }
 202             }
 203         }
 204         elsif($state==$STATE_BOOLEAN)
 205         {
 206 #           print "SM: BOOLEAN: $name\n";
 207             my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 208             if($tag)
 209             {
 210                 push(@{$self->{elements}}, $tag);
 211                 $self->state($STATE_TAG);
 212                 }
 213             else
 214             {
 215                 $self->state($STATE_INVALID);
 216             }
 217         }
 218         elsif($state==$STATE_ALBUMS)
 219         {
 220 #           print "SM: ALBUM: $name\n";
 221             if($name eq "TRACKS")
 222             {
 223                 $self->state($STATE_TRACKLIST);
 224             }
 225             else
 226             {
 227                 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
 228                 if($album)
 229                 {
 230                     push(@{$self->{elements}}, $album);
 231                     $self->state($STATE_TRACKLIST);
 232                 }
 233                 else
 234                 {
 235                     $self->state($STATE_INVALID);
 236                 }
 237             }
 238         }
 239         elsif($state==$STATE_TRACKLIST)
 240         {
 241 #           print "SM: TRACKLIST: $name\n";
 242             my $track=ID3FS::PathElement::File->new($self->{db}, $name);
 243             push(@{$self->{elements}}, $track);
 244             if($track)
 245             {
 246                 push(@{$self->{elements}}, $track);
 247                 $self->state($STATE_FILE);
 248             }
 249             else
 250             {
 251                 $self->state($STATE_INVALID);
 252             }
 253         }
 254         elsif($state==$STATE_FILE)
 255         {
 256 #           print "SM: FILE: $name\n";
 257             # Can't have anything after a filename
 258             $self->state($STATE_INVALID);
 259         }
 260         else
 261         {
 262             print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
 263             $self->state($STATE_INVALID);
 264         }
 265     }
 266 }
 267
 268 sub state
 269 {
 270     my($self, $newstate)=@_;
 271     $self->{state}=$newstate if(defined($newstate));
 272     return $self->{state};
 273 }
 274
 275 1;