C4/ClassSplitRoutine/Dewey.pm

   1 package C4::ClassSplitRoutine::Dewey;
   2
   3 # Copyright 2018 Koha Development Team
   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 Modern::Perl;
  21
  22 use C4::Debug;
  23
  24 =head1 NAME
  25
  26 C4::ClassSplitRoutine::Dewey - Dewey call number split method
  27
  28 =head1 SYNOPSIS
  29
  30 use C4::ClassSplitRoutine;
  31
  32 my $cn_split = C4::ClassSplitRoutine::Dewey::split_callnumber($cn_item);
  33
  34 =head1 FUNCTIONS
  35
  36 =head2 split_callnumber
  37
  38   my $cn_split = C4::ClassSplitRoutine::Dewey::split_callnumber($cn_item);
  39
  40 =cut
  41
  42 sub split_callnumber {
  43     my ($cn_item) = @_;
  44
  45     my $possible_decimal =
  46       qr/\d{3,}(?:\.\d+)?/;    # at least three digits for a DDCN
  47
  48     $cn_item =~ s/\///g
  49       ; # in theory we should be able to simply remove all segmentation markers and arrive at the correct call number...
  50     my (@lines) = $cn_item =~ m/
  51         ^([-a-zA-Z]*\s?(?:$possible_decimal)?) # R220.3  CD-ROM 787.87 # will require extra splitting
  52         \s+
  53         (.+)                               # H2793Z H32 c.2 EAS # everything else (except bracketing spaces)
  54         \s*
  55         /x;
  56     unless (@lines) {
  57         warn sprintf( 'regexp failed to match string: %s', $cn_item );
  58         push @lines, $cn_item;    # if no match, just push the whole string.
  59     }
  60
  61     if ( $lines[0] =~ /^([-a-zA-Z]+)\s?($possible_decimal)$/ ) {
  62         shift @lines;    # pull off the mathching first element, like example 1
  63         unshift @lines, $1, $2;    # replace it with the two pieces
  64     }
  65
  66     push @lines, split /\s+/,
  67       pop @lines
  68       ;    # split the last piece into an arbitrary number of pieces at spaces
  69     $debug and print STDERR "split_ddcn array: ", join( " | ", @lines ), "\n";
  70     return @lines;
  71 }
  72
  73 1;
  74
  75 =head1 AUTHOR
  76
  77 Koha Development Team <http://koha-community.org/>
  78
  79 =cut