| 1 | ###########################################################################
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| 2 | #
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| 3 | # MARCPlugin.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 MARCPlugin;
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| 28 |
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| 29 | use SplitTextFile;
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| 30 | use MetadataRead;
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| 31 |
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| 32 | use unicode;
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| 33 | use util;
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| 34 | use marcmapping;
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| 35 |
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| 36 | use strict;
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| 37 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 38 |
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| 39 | # methods defined in superclasses that have the same signature take
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| 40 | # precedence in the order given in the ISA list. We want MetaPlugins to
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| 41 | # call MetadataRead's can_process_this_file_for_metadata(), rather than
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| 42 | # calling BasePlugin's version of the same method, so list inherited
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| 43 | # superclasses in this order.
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| 44 | sub BEGIN {
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| 45 | @MARCPlugin::ISA = ('MetadataRead', 'SplitTextFile');
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| 46 |
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| 47 | # ensure Greenstone's CPAN is on the path (but check first) [jmt12]
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| 48 | my $inc_paths = join(':', @INC);
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| 49 | my $gsdl_perllib_path = $ENV{'GSDLHOME'} . '/perllib/cpan';
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| 50 | if ($inc_paths !~ /$gsdl_perllib_path/)
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| 51 | {
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| 52 | unshift (@INC, $gsdl_perllib_path);
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| 53 | }
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| 54 | }
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| 55 |
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| 56 | my $arguments =
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| 57 | [ { 'name' => "metadata_mapping",
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| 58 | 'desc' => "{common.deprecated} {MARCPlugin.metadata_mapping}",
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| 59 | 'type' => "string",
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| 60 | 'deft' => "",
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| 61 | 'hiddengli' => "yes", # deprecated in favour of 'metadata_mapping_file'
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| 62 | 'reqd' => "no" },
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| 63 | { 'name' => "metadata_mapping_file",
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| 64 | 'desc' => "{MARCXMLPlugin.metadata_mapping_file}",
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| 65 | 'type' => "string",
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| 66 | 'deft' => "marc2dc.txt",
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| 67 | 'reqd' => "no" },
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| 68 | { 'name' => "process_exp",
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| 69 | 'desc' => "{BasePlugin.process_exp}",
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| 70 | 'type' => "regexp",
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| 71 | 'reqd' => "no",
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| 72 | 'deft' => &get_default_process_exp() },
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| 73 | { 'name' => "split_exp",
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| 74 | 'desc' => "{SplitTextFile.split_exp}",
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| 75 | 'type' => "regexp",
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| 76 | 'reqd' => "no",
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| 77 | 'deft' => &get_default_split_exp() }
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| 78 | ];
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| 79 |
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| 80 | my $options = { 'name' => "MARCPlugin",
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| 81 | 'desc' => "{MARCPlugin.desc}",
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| 82 | 'abstract' => "no",
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| 83 | 'inherits' => "yes",
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| 84 | 'explodes' => "yes",
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| 85 | 'args' => $arguments };
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| 86 |
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| 87 | require MARC::Record;
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| 88 | require MARC::Batch;
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| 89 | #use MARC::Record;
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| 90 | #use MARC::Batch;
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| 91 |
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| 92 | sub new {
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| 93 | my ($class) = shift (@_);
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| 94 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 95 | push(@$pluginlist, $class);
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| 96 |
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| 97 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 98 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 99 |
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| 100 | # this does nothing yet, but if member vars are ever added
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| 101 | # to MetadataRead, will need to do this anyway:
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| 102 | #new MetadataRead($pluginlist, $inputargs, $hashArgOptLists);
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| 103 | my $self = new SplitTextFile($pluginlist, $inputargs, $hashArgOptLists);
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| 104 |
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| 105 | if ($self->{'info_only'}) {
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| 106 | # don't worry about the options
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| 107 | return bless $self, $class;
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| 108 | }
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| 109 | # 'metadata_mapping' was used in two ways in the plugin: as a plugin
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| 110 | # option (filename) and as a datastructure to represent the mapping.
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| 111 | # In MARXXMLPlug (written later) the two are separated: filename is
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| 112 | # represented through 'metadata_mapping_file' and the data-structure
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| 113 | # mapping left as 'metadata_mapping'
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| 114 | # 'metadata_mapping' still present (but hidden in GLI) for
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| 115 | # backwards compatibility, but 'metadata_mapping_file' is used by
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| 116 | # preference
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| 117 |
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| 118 | if ($self->{'metadata_mapping'} ne "") {
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| 119 | print STDERR "MARCPlugin WARNING:: the metadata_mapping option is set but has been deprecated. Please use metadata_mapping_file option instead\n";
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| 120 | # If the old version is set, use it.
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| 121 | $self->{'metadata_mapping_file'} = $self->{'metadata_mapping'};
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| 122 | }
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| 123 | $self->{'metadata_mapping'} = undef;
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| 124 | $self->{'type'} = "";
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| 125 | return bless $self, $class;
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| 126 | }
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| 127 |
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| 128 | sub init {
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| 129 | my $self = shift (@_);
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| 130 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 131 |
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| 132 | ## the mapping file has already been loaded
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| 133 | if (defined $self->{'metadata_mapping'} ){
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| 134 | $self->SUPER::init(@_);
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| 135 | return;
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| 136 | }
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| 137 |
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| 138 | # read in the metadata mapping files
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| 139 | my $mm_files = &util::locate_config_files($self->{'metadata_mapping_file'});
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| 140 | if (scalar(@$mm_files)==0)
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| 141 | {
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| 142 | my $msg = "MARCPlugin ERROR: Can't locate mapping file \"" .
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| 143 | $self->{'metadata_mapping_file'} . "\".\n " .
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| 144 | " No metadata will be extracted from MARC files.\n";
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| 145 |
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| 146 | print $outhandle $msg;
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| 147 | print $failhandle $msg;
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| 148 | $self->{'metadata_mapping'} = undef;
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| 149 | # We pick up the error in process() if there is no $mm_file
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| 150 | # If we exit here, then pluginfo.pl will exit too!
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| 151 | }
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| 152 | else {
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| 153 | $self->{'metadata_mapping'} = &marcmapping::parse_marc_metadata_mapping($mm_files, $outhandle);
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| 154 | }
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| 155 |
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| 156 | ##map { print STDERR $_."=>".$self->{'metadata_mapping'}->{$_}."\n"; } keys %{$self->{'metadata_mapping'}};
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| 157 |
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| 158 | $self->SUPER::init(@_);
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| 159 | }
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| 160 |
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| 161 |
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| 162 |
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| 163 | sub get_default_process_exp {
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| 164 | my $self = shift (@_);
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| 165 |
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| 166 | return q^(?i)(\.marc)$^;
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| 167 | }
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| 168 |
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| 169 |
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| 170 | sub get_default_split_exp {
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| 171 | # \r\n for msdos eol, \n for unix
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| 172 | return q^\r?\n\s*\r?\n|\[\w+\]Record type: USmarc^;
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| 173 | }
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| 174 |
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| 175 |
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| 176 |
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| 177 | # The bulk of this function is based on read_line in multiread.pm
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| 178 | # Unable to use read_line original because it expects to get its input
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| 179 | # from a file. Here the line to be converted is passed in as a string
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| 180 |
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| 181 | sub to_utf8
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| 182 | {
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| 183 | my $self = shift (@_);
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| 184 | my ($encoding, $line) = @_;
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| 185 |
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| 186 | if ($encoding eq "utf8") {
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| 187 | # nothing needs to be done
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| 188 | return $line;
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| 189 | }
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| 190 |
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| 191 | if ($encoding eq "iso_8859_1") {
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| 192 | # we'll use ascii2utf8() for this as it's faster than going
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| 193 | # through convert2unicode()
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| 194 | return &unicode::ascii2utf8 (\$line);
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| 195 | }
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| 196 |
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| 197 | # everything else uses unicode::convert2unicode
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| 198 | return &unicode::unicode2utf8 (&unicode::convert2unicode ($encoding, \$line));
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| 199 | }
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| 200 |
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| 201 |
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| 202 | sub read_file {
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| 203 | my $self = shift (@_);
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| 204 | my ($filename, $encoding, $language, $textref) = @_;
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| 205 |
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| 206 | my $outhandle = $self->{'outhandle'};
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| 207 |
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| 208 | if (! defined($self->{'metadata_mapping'}))
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| 209 | {
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| 210 | # print a warning
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| 211 | print $outhandle "MARCPlugin: no metadata mapping file! Can't extract metadata from $filename\n";
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| 212 | }
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| 213 |
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| 214 | $self->{'readfile_encoding'}->{$filename} = $encoding;
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| 215 |
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| 216 |
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| 217 | if (!-r $filename)
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| 218 | {
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| 219 | print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
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| 220 | return;
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| 221 | }
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| 222 |
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| 223 | ##handle ascii marc
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| 224 | #test whether this is ascii marc file
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| 225 | if (open (FILE, $filename)) {
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| 226 | while (defined (my $line = <FILE>)) {
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| 227 | $$textref .= $line;
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| 228 | if ($line =~ /\[\w+\]Record type:/){
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| 229 | undef $/;
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| 230 | $$textref .= <FILE>;
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| 231 | $/ = "\n";
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| 232 | $self->{'type'} = "ascii";
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| 233 | close FILE;
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| 234 | return;
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| 235 | }
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| 236 | }
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| 237 | close FILE;
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| 238 | }
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| 239 |
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| 240 |
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| 241 | $$textref = "";
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| 242 | my @marc_entries = ();
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| 243 |
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| 244 | my $batch = new MARC::Batch( 'USMARC', $filename );
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| 245 | while ( my $marc = $batch->next )
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| 246 | {
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| 247 | push(@marc_entries,$marc);
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| 248 | $$textref .= $marc->as_formatted();
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| 249 | $$textref .= "\n\n"; # for SplitTextFile - see default_split_exp above...
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| 250 | }
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| 251 |
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| 252 | $self->{'marc_entries'}->{$filename} = \@marc_entries;
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| 253 | }
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| 254 |
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| 255 |
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| 256 |
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| 257 | # do plugin specific processing of doc_obj
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| 258 | # This gets done for each record found by SplitTextFile in marc files.
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| 259 | sub process {
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| 260 | my $self = shift (@_);
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| 261 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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| 262 |
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| 263 | my $outhandle = $self->{'outhandle'};
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| 264 | my $filename = &util::filename_cat($base_dir, $file);
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| 265 |
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| 266 | my $cursection = $doc_obj->get_top_section();
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| 267 |
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| 268 | # Add fileFormat as the metadata
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| 269 | $doc_obj->add_metadata($cursection, "FileFormat", "MARC");
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| 270 |
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| 271 | my $marc_entries = $self->{'marc_entries'}->{$filename};
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| 272 | my $marc = shift(@$marc_entries);
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| 273 |
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| 274 | my $encoding = $self->{'readfile_encoding'}->{$filename};
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| 275 |
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| 276 | if (defined ($self->{'metadata_mapping'}) ) {
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| 277 | if ($self->{'type'} ne "ascii" ){
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| 278 | $self->extract_metadata ($marc, $metadata, $encoding, $doc_obj, $cursection);
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| 279 | }
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| 280 | else{
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| 281 | $self->extract_ascii_metadata ($$textref,$metadata,$doc_obj, $cursection);
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| 282 | }
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| 283 | }
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| 284 |
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| 285 | # add spaces after the sub-field markers, for word boundaries
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| 286 | $$textref =~ s/^(.{6} _\w)/$1 /gm;
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| 287 |
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| 288 | # add text to document object
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| 289 | $$textref =~ s/</</g;
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| 290 | $$textref =~ s/>/>/g;
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| 291 |
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| 292 | $$textref = $self->to_utf8($encoding,$$textref);
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| 293 |
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| 294 | print $outhandle " Adding Marc Record:\n",substr($$textref,0,40), " ...\n"
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| 295 | if $self->{'verbosity'} > 2;
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| 296 |
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| 297 | # line wrapping
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| 298 | $$textref = &wrap_text_in_columns($$textref, 64);
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| 299 | $$textref = "<pre>\n" . $$textref . "</pre>\n"; # HTML formatting...
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| 300 |
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| 301 | $doc_obj->add_utf8_text($cursection, $$textref);
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| 302 |
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| 303 | return 1;
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| 304 | }
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| 305 |
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| 306 | sub wrap_text_in_columns
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| 307 | {
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| 308 | my ($text, $columnwidth) = @_;
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| 309 | my $newtext = "";
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| 310 | my $linelength = 0;
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| 311 |
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| 312 | # Break the text into words, and display one at a time
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| 313 | my @words = split(/ /, $text);
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| 314 |
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| 315 | foreach my $word (@words) {
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| 316 | # If printing this word would exceed the column end, start a new line
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| 317 | if (($linelength + length($word)) >= $columnwidth) {
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| 318 | $newtext .= "\n";
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| 319 | $linelength = 0;
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| 320 | }
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| 321 |
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| 322 | # Write the word
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| 323 | $newtext .= " $word";
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| 324 | if ($word =~ /\n/) {
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| 325 | $linelength = 0;
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| 326 | } else {
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| 327 | $linelength = $linelength + length(" $word");
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| 328 | }
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| 329 | }
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| 330 |
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| 331 | $newtext .= "\n";
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| 332 | return $newtext;
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| 333 | }
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| 334 |
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| 335 |
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| 336 | sub extract_metadata
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| 337 | {
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| 338 | my $self = shift (@_);
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| 339 |
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| 340 | my ($marc, $metadata, $encoding, $doc_obj, $section) = @_;
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| 341 | my $outhandle = $self->{'outhandle'};
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| 342 |
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| 343 | if (!defined $marc){
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| 344 | return;
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| 345 | }
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| 346 |
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| 347 | my $metadata_mapping = $self->{'metadata_mapping'};;
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| 348 |
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| 349 | foreach my $marc_field ( keys %$metadata_mapping )
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| 350 | {
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| 351 | my $gsdl_field = $metadata_mapping->{$marc_field};
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| 352 |
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| 353 | # have we got a subfield?
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| 354 | my $subfield = undef;
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| 355 | if ($marc_field =~ /(\d\d\d)(?:\$|\^)?(\w)/){
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| 356 | $marc_field = $1;
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| 357 | $subfield = $2;
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| 358 | }
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| 359 | if (defined $subfield) {
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| 360 | my $meta_value = $marc->subfield($marc_field, $subfield);
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| 361 | if (defined $meta_value) {
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| 362 | # Square brackets in metadata values need to be escaped so they don't confuse Greenstone/GLI
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| 363 | $meta_value =~ s/\[/&\#091;/g;
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| 364 | $meta_value =~ s/\]/&\#093;/g;
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| 365 | my $metavalue_str = $self->to_utf8($encoding, $meta_value);
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| 366 | $doc_obj->add_utf8_metadata ($section, $gsdl_field, $metavalue_str);
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| 367 | }
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| 368 | }
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| 369 | else
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| 370 | {
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| 371 | foreach my $meta_value_obj ($marc->field($marc_field))
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| 372 | {
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| 373 | my $meta_value = $meta_value_obj->as_string();
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| 374 |
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| 375 | # Square brackets in metadata values need to be escaped so they don't confuse Greenstone/GLI
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| 376 | $meta_value =~ s/\[/&\#091;/g;
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| 377 | $meta_value =~ s/\]/&\#093;/g;
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| 378 | my $metavalue_str = $self->to_utf8($encoding, $meta_value);
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| 379 | $doc_obj->add_utf8_metadata ($section, $gsdl_field, $metavalue_str);
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| 380 | }
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| 381 | }
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| 382 | }
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| 383 | }
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| 384 |
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| 385 |
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| 386 | sub extract_ascii_metadata
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| 387 | {
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| 388 | my $self = shift (@_);
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| 389 |
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| 390 | my ($text, $metadata,$doc_obj, $section) = @_;
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| 391 | my $outhandle = $self->{'outhandle'};
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| 392 | my $metadata_mapping = $self->{'metadata_mapping'};
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| 393 | ## get fields
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| 394 | my @fields = split(/[\n\r]+/,$text);
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| 395 | my $marc_mapping ={};
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| 396 |
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| 397 | foreach my $field (@fields){
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| 398 | if ($field ne ""){
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| 399 | $field =~ /^(\d\d\d)\s/;
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| 400 | my $code = $1;
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| 401 | $field = $'; #'
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| 402 | ##get subfields
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| 403 | my @subfields = split(/\$/,$field);
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| 404 | my $i=0;
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| 405 | $marc_mapping->{$code} = [];
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| 406 | foreach my $subfield (@subfields){
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| 407 | if ($i == 0){
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| 408 | ##print STDERR $subfield."\n";
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| 409 | push(@{$marc_mapping->{$code}},"info");
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| 410 | push(@{$marc_mapping->{$code}},$subfield);
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| 411 |
|
|---|
| 412 | $i++;
|
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| 413 | }
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| 414 | else{
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| 415 | $subfield =~ /(\w)\s/;
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| 416 | ##print STDERR "$1=>$'\n";
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| 417 | push(@{$marc_mapping->{$code}},$1);
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| 418 | push(@{$marc_mapping->{$code}},$'); #'
|
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| 419 | }
|
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| 420 | }
|
|---|
| 421 | }
|
|---|
| 422 | }
|
|---|
| 423 |
|
|---|
| 424 |
|
|---|
| 425 | foreach my $marc_field ( keys %$metadata_mapping )
|
|---|
| 426 | {
|
|---|
| 427 |
|
|---|
| 428 | my $matched_field = $marc_mapping->{$marc_field};
|
|---|
| 429 | my $subfield = undef;
|
|---|
| 430 |
|
|---|
| 431 | if (defined $matched_field){
|
|---|
| 432 | ## test whether this field has subfield
|
|---|
| 433 | if ($marc_field =~ /\d\d\d(\w)/){
|
|---|
| 434 | $subfield = $1;
|
|---|
| 435 | }
|
|---|
| 436 | my $metaname = $metadata_mapping->{$marc_field};
|
|---|
| 437 |
|
|---|
| 438 | my $metavalue;
|
|---|
| 439 | if (defined $subfield){
|
|---|
| 440 | my %mapped_subfield = {@$matched_field};
|
|---|
| 441 | $metavalue = $mapped_subfield{$subfield};
|
|---|
| 442 | }
|
|---|
| 443 | else{ ## get all values except info
|
|---|
| 444 | my $i =0;
|
|---|
| 445 | foreach my $value (@$matched_field){
|
|---|
| 446 | if ($i%2 != 0 and $i != 1){
|
|---|
| 447 | $metavalue .= $value." ";
|
|---|
| 448 | }
|
|---|
| 449 | $i++;
|
|---|
| 450 | }
|
|---|
| 451 | }
|
|---|
| 452 |
|
|---|
| 453 | ## escape [ and ]
|
|---|
| 454 | $metavalue =~ s/\[/\\\[/g;
|
|---|
| 455 | $metavalue =~ s/\]/\\\]/g;
|
|---|
| 456 | ##print STDERR "$metaname=$metavalue\n";
|
|---|
| 457 | $doc_obj->add_metadata ($section, $metaname, $metavalue) ;
|
|---|
| 458 | }
|
|---|
| 459 |
|
|---|
| 460 | }
|
|---|
| 461 |
|
|---|
| 462 | }
|
|---|
| 463 |
|
|---|
| 464 |
|
|---|
| 465 | 1;
|
|---|
