cataloguing/value_builder/callnumber-KU.pl

   1 #!/usr/bin/perl
   2
   3 # Copyright 2012 CatalystIT Ltd
   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
  17 # with Koha; if not, write to the Free Software Foundation, Inc.,
  18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20 use strict;
  21 use warnings;
  22 use C4::Auth;
  23 use CGI qw ( -utf8 );
  24 use C4::Context;
  25
  26 =head1 DESCRIPTION
  27
  28 Is used for callnumber computation.
  29
  30 User must supply a letter prefix (unspecified length) followed by an empty space followed by a "number".
  31 "Number" is 4 character long, and is either a number sequence which is 01 padded.
  32 If input does not conform with this format any processing is omitted.
  33
  34 Some examples of legal values that trigger auto allocation:
  35
  36 AAA 0  - returns first unused number AAA 0xxx starting with AAA 0001
  37 BBB 12 - returns first unused number BBB 12xx starting with BBB 1201
  38 CCC QW - returns first unused number CCC QWxx starting with CCC QW01
  39
  40 =cut
  41
  42 sub plugin_parameters {
  43 }
  44
  45 sub plugin_javascript {
  46     my ($dbh,$record,$tagslib,$field_number,$tabloop) = @_;
  47     my $res="
  48     <script type='text/javascript'>
  49         function Focus$field_number() {
  50             return 1;
  51         }
  52
  53         function Blur$field_number() {
  54                 return 1;
  55         }
  56
  57         function Clic$field_number() {
  58                 var code = document.getElementById('$field_number');
  59                 var url = '../cataloguing/plugin_launcher.pl?plugin_name=callnumber-KU.pl&code=' + code.value;
  60                 var req = \$.get(url);
  61                 req.done(function(resp){
  62                     code.value = resp;
  63                     return 1;
  64                 });
  65             return 1;
  66         }
  67     </script>
  68     ";
  69
  70     return ($field_number,$res);
  71 }
  72
  73 my $BASE_CALLNUMBER_RE = qr/^(\w+) (\w+)$/;
  74 sub plugin {
  75     my ($input) = @_;
  76     my $code = $input->param('code');
  77
  78     my ($template, $loggedinuser, $cookie) = get_template_and_user({
  79         template_name   => "cataloguing/value_builder/ajax.tt",
  80         query           => $input,
  81         type            => "intranet",
  82         authnotrequired => 0,
  83         flagsrequired   => {editcatalogue => '*'},
  84         debug           => 1,
  85     });
  86
  87     my $ret;
  88     my ($alpha, $num) = ($code =~ $BASE_CALLNUMBER_RE);
  89     if (defined $num) { # otherwise no point
  90         my ($num_alpha, $num_num) = ($num =~ m/^(\D+)?(\d+)?$/);
  91         $num_alpha ||= '';
  92         my $pad_len = 4 - length($num);
  93
  94         if ($pad_len > 0) {
  95             my $num_padded = $num_num;
  96             $num_padded .= "0" x ($pad_len - 1) if $pad_len > 1;
  97             $num_padded .= "1";
  98             my $padded = "$alpha $num_alpha" . $num_padded;
  99
 100             my $dbh = C4::Context->dbh;
 101             if ( my $first = $dbh->selectrow_array("SELECT itemcallnumber
 102                                                     FROM items
 103                                                     WHERE itemcallnumber = ?", undef, $padded) ) {
 104                 my $icn = $dbh->selectcol_arrayref("SELECT DISTINCT itemcallnumber
 105                                                     FROM items
 106                                                     WHERE itemcallnumber LIKE ?
 107                                                       AND itemcallnumber >   ?
 108                                                     ORDER BY itemcallnumber", undef, "$alpha $num_alpha%", $first);
 109                 my $next = $num_padded + 1;
 110                 my $len = length($num_padded);
 111                 foreach (@$icn) {
 112                     my ($num1) = ( m/(\d+)$/o );
 113                     if ($num1 > $next) { # a hole in numbering found, stop
 114                         last;
 115                     }
 116                     $next++;
 117                 }
 118                 $ret = "$alpha $num_alpha" . sprintf("%0${len}d", $next) if length($next) <= $len; # no overflow
 119             }
 120             else {
 121                 $ret = $padded;
 122             }
 123         }
 124     }
 125
 126     $template->param(
 127         return => $ret || $code
 128     );
 129     output_html_with_http_headers $input, $cookie, $template->output;
 130 }
 131
 132 1;