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 OR ALLTRACKS),
  83                     $self->{db}->artists(@{$self->{elements}}));
  84         }
  85     }
  86     elsif($state==$STATE_BOOLEAN)
  87     {
  88         @dents=("NOT", $self->{db}->tags(@{$self->{elements}}));
  89     }
  90     elsif($state==$STATE_ROOT)
  91     {
  92         @dents=(qw(ALL NOT), $self->{db}->tags(@{$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             elsif($name eq "NOT")
 137             {
 138                 $self->state($STATE_BOOLEAN);
 139             }
 140             else
 141             {
 142                 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 143                 if($tag)
 144                 {
 145                     push(@{$self->{elements}}, $tag);
 146                     $self->state($STATE_TAG);
 147                 }
 148                 else
 149                 {
 150                     $self->state($STATE_INVALID);
 151                 }
 152             }
 153         }
 154         elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
 155         {
 156 #           print "SM: TAG/TAGVAL($state): $name\n";
 157             my $tag=$self->{elements}->[$#{$self->{elements}}];
 158             if($state==$STATE_TAG &&
 159                defined($tag) &&
 160                ref($tag) eq "ID3FS::PathElement::Tag" &&
 161                $self->{db}->tag_has_values($tag->{id}))
 162             {
 163                 my $tagval=ID3FS::PathElement::Tagval->new($name);
 164                 if(defined($tagval))
 165                 {
 166                     $self->state($STATE_TAGVAL);
 167                     # stay in tag state
 168                     push(@{$self->{elements}}, $tagval);
 169                 }
 170                 else
 171                 {
 172                     $self->state($STATE_INVALID);
 173                 }
 174             }
 175             elsif($name eq "ALLTRACKS")
 176             {
 177                 $self->state($STATE_TRACKLIST);
 178             }
 179             elsif($name eq "AND")
 180             {
 181                 $self->state($STATE_BOOLEAN);
 182 #               push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($name));
 183             }
 184             elsif($name eq "OR")
 185             {
 186                 $self->state($STATE_BOOLEAN);
 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_BOOLEAN)
 204         {
 205 #           print "SM: BOOLEAN: $name\n";
 206             if($name eq "NOT")
 207             {
 208                 $self->state($STATE_BOOLEAN);
 209             }
 210             else
 211             {
 212                 my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
 213                 if($tag)
 214                 {
 215                     push(@{$self->{elements}}, $tag);
 216                     $self->state($STATE_TAG);
 217                 }
 218                 else
 219                 {
 220                     $self->state($STATE_INVALID);
 221                 }
 222             }
 223         }
 224         elsif($state==$STATE_ALBUMS)
 225         {
 226 #           print "SM: ALBUM: $name\n";
 227             if($name eq "TRACKS")
 228             {
 229                 $self->state($STATE_TRACKLIST);
 230             }
 231             else
 232             {
 233                 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
 234                 if($album)
 235                 {
 236                     push(@{$self->{elements}}, $album);
 237                     $self->state($STATE_TRACKLIST);
 238                 }
 239                 else
 240                 {
 241                     $self->state($STATE_INVALID);
 242                 }
 243             }
 244         }
 245         elsif($state==$STATE_TRACKLIST)
 246         {
 247 #           print "SM: TRACKLIST: $name\n";
 248             my $track=ID3FS::PathElement::File->new($self->{db}, $name);
 249             push(@{$self->{elements}}, $track);
 250             if($track)
 251             {
 252                 push(@{$self->{elements}}, $track);
 253                 $self->state($STATE_FILE);
 254             }
 255             else
 256             {
 257                 $self->state($STATE_INVALID);
 258             }
 259         }
 260         elsif($state==$STATE_FILE)
 261         {
 262 #           print "SM: FILE: $name\n";
 263             # Can't have anything after a filename
 264             $self->state($STATE_INVALID);
 265         }
 266         else
 267         {
 268             print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
 269             $self->state($STATE_INVALID);
 270         }
 271     }
 272 }
 273
 274 sub state
 275 {
 276     my($self, $newstate)=@_;
 277     $self->{state}=$newstate if(defined($newstate));
 278     return $self->{state};
 279 }
 280
 281 1;