1 package RFID::Biblio::Reader;
6 use Data::Dump qw(dump);
13 RFID::Biblio::Reader - simple way to write RFID applications in perl
17 This module will probe all available readers and use calls from
18 L<RFID::Biblio::Reader::API> to invoke correct reader.
24 my $rfid = RFID::Biblio::Reader->new( 'optional reader filter' );
29 my ( $class, $filter ) = @_;
32 $self->{_readers} = [ $self->_available( $filter ) ];
38 my @visible = $rfid->tags(
39 enter => sub { my $tag = shift; },
40 leave => sub { my $tag = shift; },
49 $self->{_tags} ||= {};
50 $self->{_tags}->{$_}->{time} = 0 foreach keys %{$self->{_tags}};
53 foreach my $rfid ( @{ $self->{_readers} } ) {
54 warn "# inventory on $rfid";
55 my @tags = $rfid->inventory;
57 foreach my $tag ( @tags ) {
59 if ( ! exists $self->{_tags}->{$tag} ) {
61 my $blocks = $rfid->read_blocks($tag);
62 $self->{_tags}->{$tag}->{blocks} = $blocks->{$tag} || die "no $tag in ",dump($blocks);
63 my $afi = $rfid->read_afi($tag);
64 $self->{_tags}->{$tag}->{afi} = $afi;
68 warn "ERROR reading $tag: $@\n";
69 $self->_invalidate_tag( $tag );
73 $triggers->{enter}->( $tag ) if $triggers->{enter};
76 $self->{_tags}->{$tag}->{time} = $t;
80 foreach my $tag ( grep { $self->{_tags}->{$_}->{time} == 0 } keys %{ $self->{_tags} } ) {
81 $triggers->{leave}->( $tag ) if $triggers->{leave};
82 $self->_invalidate_tag( $tag );
87 warn "## _tags ",dump( $self->{_tags} );
89 return grep { $self->{_tags}->{$_}->{time} } keys %{ $self->{_tags} };
94 my $blocks_arrayref = $rfid->blocks( $tag );
98 my $afi = $rfid->afi( $tag );
102 sub blocks { $_[0]->{_tags}->{$_[1]}->{ 'blocks' } || die "no blocks for $_[1]"; };
103 sub afi { $_[0]->{_tags}->{$_[1]}->{ 'afi' } || die "no afi for $_[1]"; };
107 =head2 _invalidate_tag
109 $rfid->_invalidate_tag( $tag );
113 sub _invalidate_tag {
114 my ( $self, $tag ) = @_;
115 my @caller = caller(0);
116 warn "## _invalidate_tag caller $caller[0] $caller[1] +$caller[2]\n";
117 my $old = delete $self->{_tags}->{$tag};
118 warn "# _invalidate_tag $tag ", dump($old);
123 Probe each RFID reader supported and returns succefull ones
125 my $rfid_readers = RFID::Biblio::Reader->_available( $regex_filter );
129 my @readers = ( '3M810', 'CPRM02', 'librfid' );
132 my ( $self, $filter ) = @_;
134 $filter = '' unless defined $filter;
136 warn "# filter: $filter";
140 foreach my $reader ( @readers ) {
141 next if $filter && $reader !~ /$filter/i;
142 my $module = "RFID::Biblio::Reader::$reader";
145 if ( my $rfid = $module->new ) {
147 warn "# added $module\n";
149 warn "# ignored $module\n";
153 die "no readers found" unless @rfid;
160 On any other function calls, we just marshall to all readers
164 # we don't want DESTROY to fallback into AUTOLOAD
170 my $command = $AUTOLOAD;
175 foreach my $r ( @{ $self->{_readers} } ) {
176 push @out, $r->$command(@_);
179 $self->_invalidate_tag( $_[0] ) if $command =~ m/write/;
189 =head2 RFID reader implementations
191 L<RFID::Biblio::Reader::3M810>
193 L<RFID::Biblio::Reader::CPRM02>
195 L<RFID::Biblio::Reader::librfid>