C4/Barcodes/hbyymmincr.pm

   1 package C4::Barcodes::hbyymmincr;
   2
   3 # Copyright 2008 LibLime
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it under the
   8 # terms of the GNU General Public License as published by the Free Software
   9 # Foundation; either version 2 of the License, or (at your option) any later
  10 # version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along with
  17 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  18 # Suite 330, Boston, MA  02111-1307 USA
  19
  20 use strict;
  21 use warnings;
  22
  23 use Carp;
  24
  25 use C4::Context;
  26 use C4::Debug;
  27 use C4::Dates;
  28
  29 use vars qw($VERSION @ISA);
  30 use vars qw($debug $cgi_debug); # from C4::Debug, of course
  31 use vars qw($branch $width);
  32
  33 BEGIN {
  34     $VERSION = 0.01;
  35     @ISA = qw(C4::Barcodes);
  36 }
  37
  38 INIT {
  39         $branch = '';
  40         $width = 4;             # FIXME: 4 is too small for sizeable or multi-branch libraries.
  41 }
  42 # Generates barcode where hb = home branch Code, yymm = year/month catalogued, incr = incremental number,
  43 #       increment resets yearly -fbcit
  44
  45 sub db_max ($;$) {
  46         my $self = shift;
  47         my $query = "SELECT MAX(SUBSTRING(barcode,-$width)), barcode FROM items WHERE barcode REGEXP ? GROUP BY barcode";
  48         $debug and print STDERR "(hbyymmincr) db_max query: $query\n";
  49         my $sth = C4::Context->dbh->prepare($query);
  50         my ($iso);
  51         if (@_) {
  52                 my $input = shift;
  53                 $iso = C4::Dates->new($input,'iso')->output('iso'); # try to set the date w/ 2nd arg
  54                 unless ($iso) {
  55                         warn "Failed to create 'iso' Dates object with input '$input'.  Reverting to today's date.";
  56                         $iso = C4::Dates->new->output('iso');   # failover back to today
  57                 }
  58         } else {
  59                 $iso = C4::Dates->new->output('iso');
  60         }
  61         my $year = substr($iso,2,2);    # i.e. "08" for 2008
  62         my $andtwo = $width+2;
  63         $sth->execute("^[a-zA-Z]{1,}" . $year . "[0-9]{$andtwo}");      # the extra two digits are the month.  we don't care what they are, just that they are there.
  64         unless ($sth->rows) {
  65                 warn "No existing hbyymmincr barcodes found.  Reverting to initial value.";
  66                 return $self->initial;
  67         }
  68         my ($row) = $sth->fetchrow_hashref;
  69         my $max = $row->{barcode};
  70         warn "barcode max (hbyymmincr format): $max" if $debug;
  71         return ($max || 0);
  72 }
  73
  74 sub initial () {
  75         my $self = shift;
  76         # FIXME: populated branch?
  77         my $iso = C4::Dates->new->output('iso');        # like "2008-07-02"
  78         return $self->branch . substr($iso,2,2) . substr($iso,5,2) . sprintf('%' . "$width.$width" . 'd',1);
  79 }
  80
  81 sub parse ($;$) {   # return 3 parts of barcode: non-incrementing, incrementing, non-incrementing
  82         my $self = shift;
  83         my $barcode = (@_) ? shift : $self->value;
  84         my $branch = $self->branch;
  85         unless ($barcode =~ /($branch\d{4})(\d+)$/) {
  86                 carp "Barcode '$barcode' has no incrementing part!";
  87                 return ($barcode,undef,undef);
  88         }
  89         $debug and warn "Barcode '$barcode' parses into: '$1', '$2', ''";
  90         return ($1,$2,'');  # the third part is in anticipation of barcodes that include checkdigits
  91 }
  92
  93 sub branch ($;$) {
  94         my $self = shift;
  95         (@_) and $self->{branch} = shift;
  96         return $self->{branch};
  97 }
  98 sub width ($;$) {
  99         my $self = shift;
 100         (@_) and $width = shift;        # hitting the class variable.
 101         return $width;
 102 }
 103 sub process_head($$;$$) {       # (self,head,whole,specific)
 104         my ($self,$head,$whole,$specific) = @_;
 105         $specific and return $head;     # if this is built off an existing barcode, just return the head unchanged.
 106         $head =~ s/\d{4}$//;            # else strip the old yymm
 107         my $iso = C4::Dates->new->output('iso');        # like "2008-07-02"
 108         return $head . substr($iso,2,2) . substr($iso,5,2);
 109 }
 110
 111 sub new_object {
 112         $debug and warn "hbyymmincr: new_object called";
 113         my $class_or_object = shift;
 114         my $type = ref($class_or_object) || $class_or_object;
 115         my $from_obj = ref($class_or_object) ? 1 : 0;   # are we building off another Barcodes object?
 116         my $self = $class_or_object->default_self('hbyymmincr');
 117         bless $self, $type;
 118         $self->branch(@_ ? shift : $from_obj ? $class_or_object->branch : $branch);
 119                 # take the branch from argument, or existing object, or default
 120         use Data::Dumper;
 121         $debug and print STDERR "(hbyymmincr) new_object: ", Dumper($self), "\n";
 122         return $self;
 123 }
 124
 125 1;
 126 __END__
 127
 128 =head1 NOTICE
 129
 130 This format is deprecated and SHOULD NOT BE USED.
 131
 132 It is fairly clear the originator of the format did not intend to accomodate
 133 multiple branch libraries, given that the format caps the available namespace to
 134 10,000 barcodes per year TOTAL.
 135
 136 Also, the question of what to do with an item that changes branch is unsettled.
 137 Nothing prevents the barcode from working fine, but it will look out of place
 138 with the old branchcode in it.  Rebarcoding a single item is trivial, but if you
 139 consider the scenario of branches being consolidated, it is an unnecessary
 140 burden to force the rebarcoding of thousands of items, especially when the format
 141 will limit you to under 10,000 on the year!
 142
 143 The main purpose of the format seems to be to get the branch code into the barcode.
 144 This is wholly unnecessary, since the barcodes can be printed with the branchcode
 145 directly on it, without it being part of the barcode itself.
 146
 147 The API for this module should exist almost exclusively through C4::Barcodes.
 148 One novel aspect of this format is the fact that the barcode is tied to a branch.
 149
 150 =cut