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
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use strict;
  21 use warnings;
  22 use C4::Auth;
  23 use CGI qw ( -utf8 );
  24 use C4::Context;
  25 use C4::Output;
  26
  27 =head1 DESCRIPTION
  28
  29 Is used for callnumber computation.
  30
  31 User must supply a letter prefix (unspecified length) followed by an empty space followed by a "number".
  32 "Number" is 4 character long, and is either a number sequence which is 01 padded.
  33 If input does not conform with this format any processing is omitted.
  34
  35 Some examples of legal values that trigger auto allocation:
  36
  37 AAA 0  - returns first unused number AAA 0xxx starting with AAA 0001
  38 BBB 12 - returns first unused number BBB 12xx starting with BBB 1201
  39 CCC QW - returns first unused number CCC QWxx starting with CCC QW01
  40
  41 =cut
  42
  43 sub plugin_javascript {
  44     my ($dbh,$record,$tagslib,$field_number,$tabloop) = @_;
  45     my $res="
  46     <script type='text/javascript'>
  47         function Clic$field_number() {
  48                 var code = document.getElementById('$field_number');
  49                 var url = '../cataloguing/plugin_launcher.pl?plugin_name=callnumber-KU.pl&code=' + code.value;
  50                 var req = \$.get(url);
  51                 req.done(function(resp){
  52                     code.value = resp;
  53                     return 1;
  54                 });
  55             return 1;
  56         }
  57     </script>
  58     ";
  59
  60     return ($field_number,$res);
  61 }
  62
  63 my $BASE_CALLNUMBER_RE = qr/^(\w+) (\w+)$/;
  64 sub plugin {
  65     my ($input) = @_;
  66     my $code = $input->param('code');
  67
  68     my ($template, $loggedinuser, $cookie) = get_template_and_user({
  69         template_name   => "cataloguing/value_builder/ajax.tt",
  70         query           => $input,
  71         type            => "intranet",
  72         authnotrequired => 0,
  73         flagsrequired   => {editcatalogue => '*'},
  74         debug           => 1,
  75     });
  76
  77     my $ret;
  78     my ($alpha, $num) = ($code =~ $BASE_CALLNUMBER_RE);
  79     if (defined $num) { # otherwise no point
  80         my ($num_alpha, $num_num) = ($num =~ m/^(\D+)?(\d+)?$/);
  81         $num_alpha ||= '';
  82         my $pad_len = 4 - length($num);
  83
  84         if ($pad_len > 0) {
  85             my $num_padded = $num_num;
  86             $num_padded .= "0" x ($pad_len - 1) if $pad_len > 1;
  87             $num_padded .= "1";
  88             my $padded = "$alpha $num_alpha" . $num_padded;
  89
  90             my $dbh = C4::Context->dbh;
  91             if ( my $first = $dbh->selectrow_array("SELECT itemcallnumber
  92                                                     FROM items
  93                                                     WHERE itemcallnumber = ?", undef, $padded) ) {
  94                 my $icn = $dbh->selectcol_arrayref("SELECT DISTINCT itemcallnumber
  95                                                     FROM items
  96                                                     WHERE itemcallnumber LIKE ?
  97                                                       AND itemcallnumber >   ?
  98                                                     ORDER BY itemcallnumber", undef, "$alpha $num_alpha%", $first);
  99                 my $next = $num_padded + 1;
 100                 my $len = length($num_padded);
 101                 foreach (@$icn) {
 102                     my ($num1) = ( m/(\d+)$/o );
 103                     if ($num1 > $next) { # a hole in numbering found, stop
 104                         last;
 105                     }
 106                     $next++;
 107                 }
 108                 $ret = "$alpha $num_alpha" . sprintf("%0${len}d", $next) if length($next) <= $len; # no overflow
 109             }
 110             else {
 111                 $ret = $padded;
 112             }
 113         }
 114     }
 115
 116     $template->param(
 117         return => $ret || $code
 118     );
 119     output_html_with_http_headers $input, $cookie, $template->output;
 120 }