1 package Biblio::RFID::Reader;
6 use Data::Dump qw(dump);
14 Biblio::RFID::Reader - simple way to write RFID applications in perl
18 This module will probe all available readers and use calls from
19 L<Biblio::RFID::Reader::API> to invoke correct reader.
25 my $rfid = Biblio::RFID::Reader->new( 'optional reader filter' );
30 my ( $class, $filter ) = @_;
33 $self->{_readers} = [ $self->_available( $filter ) ];
39 my @visible = $rfid->tags(
40 enter => sub { my $tag = shift; },
41 leave => sub { my $tag = shift; },
50 $self->{_tags} ||= {};
51 $self->{_tags}->{$_}->{time} = 0 foreach keys %{$self->{_tags}};
54 foreach my $rfid ( @{ $self->{_readers} } ) {
55 warn "# inventory on $rfid";
56 my @tags = $rfid->inventory;
58 foreach my $tag ( @tags ) {
60 if ( ! exists $self->{_tags}->{$tag} ) {
62 my $blocks = $rfid->read_blocks($tag);
63 $self->{_tags}->{$tag}->{blocks} = $blocks->{$tag} || die "no $tag in ",dump($blocks);
64 my $afi = $rfid->read_afi($tag);
65 $self->{_tags}->{$tag}->{afi} = $afi;
69 warn "ERROR reading $tag: $@\n";
70 $self->_invalidate_tag( $tag );
74 $triggers->{enter}->( $tag ) if $triggers->{enter};
77 $self->{_tags}->{$tag}->{time} = $t;
81 foreach my $tag ( grep { $self->{_tags}->{$_}->{time} == 0 } keys %{ $self->{_tags} } ) {
82 $triggers->{leave}->( $tag ) if $triggers->{leave};
83 $self->_invalidate_tag( $tag );
88 warn "## _tags ",dump( $self->{_tags} );
90 return grep { $self->{_tags}->{$_}->{time} } keys %{ $self->{_tags} };
95 my $blocks_arrayref = $rfid->blocks( $tag );
99 my $afi = $rfid->afi( $tag );
103 sub blocks { $_[0]->{_tags}->{$_[1]}->{ 'blocks' } || confess "no blocks for $_[1]"; };
104 sub afi { $_[0]->{_tags}->{$_[1]}->{ 'afi' } || confess "no afi for $_[1]"; };
108 =head2 _invalidate_tag
110 $rfid->_invalidate_tag( $tag );
114 sub _invalidate_tag {
115 my ( $self, $tag ) = @_;
116 my @caller = caller(0);
117 warn "## _invalidate_tag caller $caller[0] $caller[1] +$caller[2]\n";
118 my $old = delete $self->{_tags}->{$tag};
119 warn "# _invalidate_tag $tag ", dump($old);
124 Probe each RFID reader supported and returns succefull ones
126 my $rfid_readers = Biblio::RFID::Reader->_available( $regex_filter );
130 my @readers = ( '3M810', 'CPRM02', 'librfid' );
133 my ( $self, $filter ) = @_;
135 $filter = '' unless defined $filter;
137 warn "# filter: $filter";
141 foreach my $reader ( @readers ) {
142 next if $filter && $reader !~ /$filter/i;
143 my $module = "Biblio::RFID::Reader::$reader";
146 if ( my $rfid = $module->new ) {
148 warn "# added $module\n";
150 warn "# ignored $module\n";
154 die "no readers found" unless @rfid;
161 On any other function calls, we just marshall to all readers
165 # we don't want DESTROY to fallback into AUTOLOAD
171 my $command = $AUTOLOAD;
176 foreach my $r ( @{ $self->{_readers} } ) {
177 push @out, $r->$command(@_);
180 $self->_invalidate_tag( $_[0] ) if $command =~ m/write/;
190 =head2 RFID reader implementations
192 L<Biblio::RFID::Reader::3M810>
194 L<Biblio::RFID::Reader::CPRM02>
196 L<Biblio::RFID::Reader::librfid>