| 1 | ###########################################################################
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| 2 | #
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| 3 | # MARCPlug.pm -- basic MARC plugin
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 2002 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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| 27 | package MARCPlug;
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| 28 |
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| 29 | use SplitPlug;
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| 30 |
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| 31 | use unicode;
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| 32 | use util;
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| 33 |
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| 34 | use strict;
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| 35 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 36 |
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| 37 | sub BEGIN {
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| 38 | @MARCPlug::ISA = ('SplitPlug');
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| 39 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/cpan");
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| 40 | }
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| 41 |
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| 42 | my $arguments =
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| 43 | [ { 'name' => "metadata_mapping",
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| 44 | 'desc' => "{MARCPlug.metadata_mapping}",
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| 45 | 'type' => "string",
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| 46 | 'deft' => "marctodc.txt",
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| 47 | 'hiddengli' => "yes", # deprecated in favour or 'metadata_mapping_file'
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| 48 | 'reqd' => "no" },
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| 49 | { 'name' => "metadata_mapping_file",
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| 50 | 'desc' => "{MARCXMLPlug.metadata_mapping_file}",
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| 51 | 'type' => "string",
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| 52 | 'deft' => "",
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| 53 | 'reqd' => "no" },
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| 54 | { 'name' => "process_exp",
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| 55 | 'desc' => "{BasPlug.process_exp}",
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| 56 | 'type' => "regexp",
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| 57 | 'reqd' => "no",
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| 58 | 'deft' => &get_default_process_exp() },
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| 59 | { 'name' => "split_exp",
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| 60 | 'desc' => "{SplitPlug.split_exp}",
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| 61 | 'type' => "regexp",
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| 62 | 'reqd' => "no",
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| 63 | 'deft' => &get_default_split_exp() }
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| 64 | ];
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| 65 |
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| 66 | my $options = { 'name' => "MARCPlug",
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| 67 | 'desc' => "{MARCPlug.desc}",
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| 68 | 'abstract' => "no",
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| 69 | 'inherits' => "yes",
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| 70 | 'explodes' => "yes",
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| 71 | 'args' => $arguments };
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| 72 |
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| 73 | require MARC::Record;
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| 74 | require MARC::Batch;
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| 75 | #use MARC::Record;
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| 76 | #use MARC::Batch;
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| 77 |
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| 78 | sub new {
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| 79 | my ($class) = shift (@_);
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| 80 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 81 | push(@$pluginlist, $class);
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| 82 |
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| 83 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 84 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 85 |
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| 86 | my $self = new SplitPlug($pluginlist, $inputargs, $hashArgOptLists);
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| 87 |
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| 88 | # 'metadata_mapping' was used in two ways in the plugin: as a plugin
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| 89 | # option (filename) and as a datastructure to represent the mapping.
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| 90 | # In MARXXMLPlug (written later) the two are separated: filename is
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| 91 | # represented through 'metadata_mapping_file' and the data-structure
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| 92 | # mapping left as 'metadata_mapping'
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| 93 | # 'metadata_mapping' still present (but hidden in GLI) for
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| 94 | # backwards compatibility, but 'metadata_mapping_file' is used by
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| 95 | # preference
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| 96 |
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| 97 | if ($self->{'metadata_mapping_file'} eq "") {
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| 98 | # If nothing set in the new version, use the old version
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| 99 | # that defaults to 'marctodc.txt'
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| 100 | $self->{'metadata_mapping_file'} = $self->{'metadata_mapping'};
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| 101 | }
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| 102 |
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| 103 | $self->{'type'} = "";
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| 104 |
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| 105 | return bless $self, $class;
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| 106 | }
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| 107 |
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| 108 | sub init {
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| 109 | my $self = shift (@_);
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| 110 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 111 |
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| 112 | my @metadata_mapping = ();
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| 113 |
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| 114 | # read in the metadata mapping file
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| 115 |
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| 116 | my $mm_file = &util::locate_config_file($self->{'metadata_mapping_file'});
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| 117 |
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| 118 | if (!defined $mm_file)
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| 119 | {
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| 120 |
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| 121 | my $msg = "MARCPlug ERROR: Can't locate mapping file \"" .
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| 122 | $self->{'metadata_mapping_file'} . "\".\n" .
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| 123 | " No marc files can be processed.\n";
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| 124 |
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| 125 | print $outhandle $msg;
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| 126 | print $failhandle $msg;
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| 127 | $self->{'metadata_mapping'} = undef;
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| 128 | # We pick up the error in process() if there is no $mm_file
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| 129 | # If we exit here, then pluginfo.pl will exit too!
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| 130 | }
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| 131 | elsif (open(MMIN, "<$mm_file"))
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| 132 | {
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| 133 | my $l=1;
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| 134 | my $line;
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| 135 | while (defined($line=<MMIN>))
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| 136 | {
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| 137 | chomp $line;
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| 138 | if ($line =~ m/^(\d+)\s*->\s*([\w\^]+)$/)
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| 139 | {
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| 140 | my $marc_info = $1;
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| 141 | my $gsdl_info = $2;
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| 142 | my $mapping = { 'marc' => $marc_info, 'gsdl' => $gsdl_info };
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| 143 | push(@metadata_mapping,$mapping);
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| 144 | }
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| 145 | elsif ($line !~ m/^\#/ # allow comments (# in first column)
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| 146 | && $line !~ m/^\s*$/) # allow blank lines
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| 147 | {
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| 148 | print $outhandle "Parse error on line $l of $mm_file:\n";
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| 149 | print $outhandle " \"$line\"\n";
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| 150 | }
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| 151 | $l++
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| 152 | }
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| 153 | close(MMIN);
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| 154 |
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| 155 | $self->{'metadata_mapping'} = \@metadata_mapping;
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| 156 | }
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| 157 | else
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| 158 | {
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| 159 | print STDERR "Unable to open $mm_file: $!\n";
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| 160 | }
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| 161 |
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| 162 |
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| 163 |
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| 164 | $self->SUPER::init(@_);
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| 165 | }
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| 166 |
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| 167 |
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| 168 | sub get_default_process_exp {
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| 169 | my $self = shift (@_);
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| 170 |
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| 171 | return q^(?i)(\.marc)$^;
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| 172 | }
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| 173 |
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| 174 |
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| 175 | sub get_default_split_exp {
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| 176 | # \r\n for msdos eol, \n for unix
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| 177 | return q^\r?\n\s*\r?\n|\[\w+\]Record type: USmarc^;
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| 178 | }
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| 179 |
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| 180 |
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| 181 |
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| 182 | # The bulk of this function is based on read_line in multiread.pm
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| 183 | # Unable to use read_line original because it expects to get its input
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| 184 | # from a file. Here the line to be converted is passed in as a string
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| 185 |
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| 186 | sub to_utf8
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| 187 | {
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| 188 | my $self = shift (@_);
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| 189 | my ($encoding, $line) = @_;
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| 190 |
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| 191 | if ($encoding eq "utf8") {
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| 192 | # nothing needs to be done
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| 193 | return $line;
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| 194 | }
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| 195 |
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| 196 | if ($encoding eq "iso_8859_1") {
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| 197 | # we'll use ascii2utf8() for this as it's faster than going
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| 198 | # through convert2unicode()
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| 199 | return &unicode::ascii2utf8 (\$line);
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| 200 | }
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| 201 |
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| 202 | # everything else uses unicode::convert2unicode
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| 203 | return &unicode::unicode2utf8 (&unicode::convert2unicode ($encoding, \$line));
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| 204 | }
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| 205 |
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| 206 |
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| 207 | sub read_file {
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| 208 | my $self = shift (@_);
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| 209 | my ($filename, $encoding, $language, $textref) = @_;
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| 210 |
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| 211 | $self->{'readfile_encoding'}->{$filename} = $encoding;
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| 212 |
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| 213 |
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| 214 | if (!-r $filename)
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| 215 | {
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| 216 | my $outhandle = $self->{'outhandle'};
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| 217 | print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
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| 218 | return;
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| 219 | }
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| 220 |
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| 221 | ##handle ascii marc
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| 222 | #test whether this is ascii marc file
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| 223 | if (open (FILE, $filename)) {
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| 224 | while (defined (my $line = <FILE>)) {
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| 225 | $$textref .= $line;
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| 226 | if ($line =~ /\[\w+\]Record type:/){
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| 227 | undef $/;
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| 228 | $$textref .= <FILE>;
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| 229 | $/ = "\n";
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| 230 | $self->{'type'} = "ascii";
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| 231 | close FILE;
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| 232 | return;
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| 233 | }
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| 234 | }
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| 235 | close FILE;
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| 236 | }
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| 237 |
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| 238 |
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| 239 | $$textref = "";
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| 240 | my @marc_entries = ();
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| 241 |
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| 242 | my $batch = new MARC::Batch( 'USMARC', $filename );
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| 243 | while ( my $marc = $batch->next )
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| 244 | {
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| 245 | push(@marc_entries,$marc);
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| 246 | $$textref .= $marc->as_formatted();
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| 247 | $$textref .= "\n\n"; # for SplitPlug - see default_split_exp above...
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| 248 | }
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| 249 |
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| 250 | $self->{'marc_entries'}->{$filename} = \@marc_entries;
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| 251 | }
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| 252 |
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| 253 |
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| 254 |
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| 255 | # do plugin specific processing of doc_obj
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| 256 | # This gets done for each record found by SplitPlug in marc files.
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| 257 | sub process {
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| 258 | my $self = shift (@_);
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| 259 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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| 260 |
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| 261 | my $outhandle = $self->{'outhandle'};
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| 262 | my $filename = &util::filename_cat($base_dir, $file);
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| 263 |
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| 264 | if (! defined($self->{'metadata_mapping'}))
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| 265 | {
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| 266 | print $outhandle "MARCPlug: no metadata file! Can't process $file\n";
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| 267 | return undef;
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| 268 | }
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| 269 |
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| 270 | print STDERR "<Processing n='$file' p='MARCPlug'>\n" if ($gli);
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| 271 | print $outhandle "MARCPlug: processing $file\n"
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| 272 | if $self->{'verbosity'} > 1;
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| 273 |
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| 274 | my $cursection = $doc_obj->get_top_section();
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| 275 |
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| 276 | # Add fileFormat as the metadata
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| 277 | $doc_obj->add_metadata($cursection, "FileFormat", "MARC");
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| 278 |
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| 279 | my $marc_entries = $self->{'marc_entries'}->{$filename};
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| 280 | my $marc = shift(@$marc_entries);
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| 281 |
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| 282 | my $encoding = $self->{'readfile_encoding'}->{$filename};
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| 283 |
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| 284 | if ($self->{'type'} ne "ascii" ){
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| 285 | $self->extract_metadata ($marc, $metadata, $encoding, $doc_obj, $cursection);
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| 286 | }
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| 287 | else{
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| 288 | $self->extract_ascii_metadata ($$textref,$metadata,$doc_obj, $cursection);
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| 289 | }
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| 290 |
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| 291 | # add spaces after the sub-field markers, for word boundaries
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| 292 | $$textref =~ s/^(.{6} _\w)/$1 /gm;
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| 293 |
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| 294 | # add text to document object
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| 295 | $$textref =~ s/</</g;
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| 296 | $$textref =~ s/>/>/g;
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| 297 |
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| 298 | $$textref = $self->to_utf8($encoding,$$textref);
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| 299 |
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| 300 | print $outhandle " Adding Marc Record:\n",substr($$textref,0,40), " ...\n"
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| 301 | if $self->{'verbosity'} > 2;
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| 302 |
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| 303 | # line wrapping
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| 304 | $$textref = &wrap_text_in_columns($$textref, 64);
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| 305 | $$textref = "<pre>\n" . $$textref . "</pre>\n"; # HTML formatting...
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| 306 |
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| 307 | $doc_obj->add_utf8_text($cursection, $$textref);
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| 308 |
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| 309 | return 1;
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| 310 | }
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| 311 |
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| 312 | sub wrap_text_in_columns
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| 313 | {
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| 314 | my ($text, $columnwidth) = @_;
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| 315 | my $newtext = "";
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| 316 | my $linelength = 0;
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| 317 |
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| 318 | # Break the text into words, and display one at a time
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| 319 | my @words = split(/ /, $text);
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| 320 |
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| 321 | foreach my $word (@words) {
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| 322 | # If printing this word would exceed the column end, start a new line
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| 323 | if (($linelength + length($word)) >= $columnwidth) {
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| 324 | $newtext .= "\n";
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| 325 | $linelength = 0;
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| 326 | }
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| 327 |
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| 328 | # Write the word
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| 329 | $newtext .= " $word";
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| 330 | if ($word =~ /\n/) {
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| 331 | $linelength = 0;
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| 332 | } else {
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| 333 | $linelength = $linelength + length(" $word");
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| 334 | }
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| 335 | }
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| 336 |
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| 337 | $newtext .= "\n";
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| 338 | return $newtext;
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| 339 | }
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| 340 |
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| 341 |
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| 342 | sub extract_metadata
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| 343 | {
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| 344 | my $self = shift (@_);
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| 345 | my ($marc, $metadata, $encoding, $doc_obj, $section) = @_;
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| 346 | my $outhandle = $self->{'outhandle'};
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| 347 |
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| 348 | if (!defined $marc){
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| 349 | return;
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| 350 | }
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| 351 |
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| 352 | my $metadata_mapping = $self->{'metadata_mapping'};
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| 353 | my $mm;
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| 354 |
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| 355 | foreach $mm ( @$metadata_mapping )
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| 356 | {
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| 357 | my $marc_field = $mm->{'marc'};
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| 358 |
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| 359 | my @metavalues = $marc->field($marc_field);
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| 360 |
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| 361 | if (scalar(@metavalues)>0)
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| 362 | {
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| 363 | my $metaname = $mm->{'gsdl'};
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| 364 | my $metavalue;
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| 365 | foreach $metavalue ( @metavalues )
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| 366 | {
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| 367 | my $metavalue_str = $self->to_utf8($encoding,$metavalue->as_string());
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| 368 | $doc_obj->add_utf8_metadata ($section, $metaname, $metavalue_str);
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| 369 | }
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| 370 | }
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| 371 | }
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| 372 | }
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| 373 |
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| 374 | sub extract_ascii_metadata
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| 375 | {
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| 376 | my $self = shift (@_);
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| 377 | my ($text, $metadata,$doc_obj, $section) = @_;
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| 378 | my $outhandle = $self->{'outhandle'};
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| 379 | my $metadata_mapping = $self->{'metadata_mapping'};
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| 380 | ## get fields
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| 381 | my @fields = split(/[\n\r]+/,$text);
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| 382 | my $marc_mapping ={};
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| 383 |
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| 384 | foreach my $field (@fields){
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| 385 | if ($field ne ""){
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| 386 | $field =~ /^(\d\d\d)\s/;
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| 387 | my $code = $1;
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| 388 | $field = $';
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| 389 | ##get subfields
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| 390 | my @subfields = split(/\$/,$field);
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| 391 | my $i=0;
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| 392 | $marc_mapping->{$code} = [];
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| 393 | foreach my $subfield (@subfields){
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| 394 | if ($i == 0){
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| 395 | ##print STDERR $subfield."\n";
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| 396 | push(@{$marc_mapping->{$code}},"info");
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| 397 | push(@{$marc_mapping->{$code}},$subfield);
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| 398 |
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| 399 | $i++;
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| 400 | }
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| 401 | else{
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| 402 | $subfield =~ /(\w)\s/;
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| 403 | ##print STDERR "$1=>$'\n";
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| 404 | push(@{$marc_mapping->{$code}},$1);
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| 405 | push(@{$marc_mapping->{$code}},$');
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| 406 | }
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| 407 | }
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| 408 | }
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| 409 | }
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| 410 |
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| 411 |
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| 412 | foreach my $mm ( @$metadata_mapping )
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| 413 | {
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| 414 | my $marc_field = $mm->{'marc'};
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| 415 |
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| 416 | my $matched_field = $marc_mapping->{$marc_field};
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| 417 | my $subfield = undef;
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| 418 |
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| 419 | if (defined $matched_field){
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| 420 | ## test whether this field has subfield
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| 421 | if ($marc_field =~ /\d\d\d(\w)/){
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| 422 | $subfield = $1;
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| 423 | }
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| 424 | my $metaname = $mm->{'gsdl'};
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| 425 |
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| 426 | my $metavalue;
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| 427 | if (defined $subfield){
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| 428 | my %mapped_subfield = {@$matched_field};
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| 429 | $metavalue = $mapped_subfield{$subfield};
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| 430 | }
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| 431 | else{ ## get all values except info
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| 432 | my $i =0;
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| 433 | foreach my $value (@$matched_field){
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| 434 | if ($i%2 != 0 and $i != 1){
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| 435 | $metavalue .= $value." ";
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| 436 | }
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| 437 | $i++;
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| 438 | }
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| 439 | }
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| 440 |
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| 441 | ## escape [ and ]
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| 442 | $metavalue =~ s/\[/\\\[/g;
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| 443 | $metavalue =~ s/\]/\\\]/g;
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| 444 | ##print STDERR "$metaname=$metavalue\n";
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| 445 | $doc_obj->add_metadata ($section, $metaname, $metavalue) ;
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| 446 | }
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|---|
| 447 |
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|---|
| 448 | }
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|---|
| 449 |
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|---|
| 450 | }
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|---|
| 451 |
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|---|
| 452 |
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|---|
| 453 | 1;
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