[3430] | 1 | ###########################################################################
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| 2 | #
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[15872] | 3 | # MARCPlugin.pm -- basic MARC plugin
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[3430] | 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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[3508] | 9 | # Copyright (C) 2002 New Zealand Digital Library Project
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[3430] | 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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[15872] | 27 | package MARCPlugin;
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[3430] | 28 |
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[15872] | 29 | use SplitTextFile;
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[24547] | 30 | use MetadataRead;
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[3430] | 31 |
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[27106] | 32 | use Encode;
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| 33 |
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[3430] | 34 | use unicode;
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| 35 | use util;
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[16692] | 36 | use marcmapping;
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[3430] | 37 |
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[10254] | 38 | use strict;
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| 39 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 40 |
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[24547] | 41 | # methods defined in superclasses that have the same signature take
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| 42 | # precedence in the order given in the ISA list. We want MetaPlugins to
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| 43 | # call MetadataRead's can_process_this_file_for_metadata(), rather than
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[31492] | 44 | # calling BaseImporter's version of the same method, so list inherited
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[24547] | 45 | # superclasses in this order.
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[3430] | 46 | sub BEGIN {
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[24547] | 47 | @MARCPlugin::ISA = ('MetadataRead', 'SplitTextFile');
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[5878] | 48 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/cpan");
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[3430] | 49 | }
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| 50 |
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[4744] | 51 | my $arguments =
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| 52 | [ { 'name' => "metadata_mapping",
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[16692] | 53 | 'desc' => "{common.deprecated} {MARCPlugin.metadata_mapping}",
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[4744] | 54 | 'type' => "string",
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[16692] | 55 | 'deft' => "",
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[15962] | 56 | 'hiddengli' => "yes", # deprecated in favour of 'metadata_mapping_file'
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[6408] | 57 | 'reqd' => "no" },
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[15018] | 58 | { 'name' => "metadata_mapping_file",
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[16013] | 59 | 'desc' => "{MARCXMLPlugin.metadata_mapping_file}",
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[15018] | 60 | 'type' => "string",
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[18563] | 61 | 'deft' => "marc2dc.txt",
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[15018] | 62 | 'reqd' => "no" },
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[6408] | 63 | { 'name' => "process_exp",
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[31492] | 64 | 'desc' => "{BaseImporter.process_exp}",
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[6408] | 65 | 'type' => "regexp",
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| 66 | 'reqd' => "no",
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| 67 | 'deft' => &get_default_process_exp() },
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| 68 | { 'name' => "split_exp",
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[15872] | 69 | 'desc' => "{SplitTextFile.split_exp}",
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[6408] | 70 | 'type' => "regexp",
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| 71 | 'reqd' => "no",
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| 72 | 'deft' => &get_default_split_exp() }
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| 73 | ];
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[4744] | 74 |
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[15872] | 75 | my $options = { 'name' => "MARCPlugin",
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| 76 | 'desc' => "{MARCPlugin.desc}",
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[6408] | 77 | 'abstract' => "no",
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[11676] | 78 | 'inherits' => "yes",
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[9118] | 79 | 'explodes' => "yes",
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[4744] | 80 | 'args' => $arguments };
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| 81 |
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[5866] | 82 | require MARC::Record;
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| 83 | require MARC::Batch;
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[6332] | 84 | #use MARC::Record;
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| 85 | #use MARC::Batch;
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[3430] | 86 |
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| 87 | sub new {
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[10218] | 88 | my ($class) = shift (@_);
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| 89 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 90 | push(@$pluginlist, $class);
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[3430] | 91 |
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[15872] | 92 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 93 | push(@{$hashArgOptLists->{"OptList"}},$options);
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[24547] | 94 |
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| 95 | # this does nothing yet, but if member vars are ever added
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| 96 | # to MetadataRead, will need to do this anyway:
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| 97 | #new MetadataRead($pluginlist, $inputargs, $hashArgOptLists);
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[15872] | 98 | my $self = new SplitTextFile($pluginlist, $inputargs, $hashArgOptLists);
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[3430] | 99 |
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[15962] | 100 | if ($self->{'info_only'}) {
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| 101 | # don't worry about the options
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| 102 | return bless $self, $class;
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| 103 | }
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[15018] | 104 | # 'metadata_mapping' was used in two ways in the plugin: as a plugin
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| 105 | # option (filename) and as a datastructure to represent the mapping.
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| 106 | # In MARXXMLPlug (written later) the two are separated: filename is
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| 107 | # represented through 'metadata_mapping_file' and the data-structure
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| 108 | # mapping left as 'metadata_mapping'
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| 109 | # 'metadata_mapping' still present (but hidden in GLI) for
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| 110 | # backwards compatibility, but 'metadata_mapping_file' is used by
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| 111 | # preference
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| 112 |
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[16692] | 113 | if ($self->{'metadata_mapping'} ne "") {
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| 114 | 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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| 115 | # If the old version is set, use it.
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[15018] | 116 | $self->{'metadata_mapping_file'} = $self->{'metadata_mapping'};
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| 117 | }
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[16692] | 118 | $self->{'metadata_mapping'} = undef;
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[13198] | 119 | $self->{'type'} = "";
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[3430] | 120 | return bless $self, $class;
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| 121 | }
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| 122 |
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| 123 | sub init {
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| 124 | my $self = shift (@_);
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| 125 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 126 |
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[16692] | 127 | ## the mapping file has already been loaded
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| 128 | if (defined $self->{'metadata_mapping'} ){
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| 129 | $self->SUPER::init(@_);
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| 130 | return;
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| 131 | }
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[3430] | 132 |
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[16692] | 133 | # read in the metadata mapping files
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| 134 | my $mm_files = &util::locate_config_files($self->{'metadata_mapping_file'});
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| 135 | if (scalar(@$mm_files)==0)
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[3430] | 136 | {
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[15872] | 137 | my $msg = "MARCPlugin ERROR: Can't locate mapping file \"" .
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[16692] | 138 | $self->{'metadata_mapping_file'} . "\".\n " .
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[16697] | 139 | " No metadata will be extracted from MARC files.\n";
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[3430] | 140 |
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| 141 | print $outhandle $msg;
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| 142 | print $failhandle $msg;
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[10218] | 143 | $self->{'metadata_mapping'} = undef;
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[3430] | 144 | # We pick up the error in process() if there is no $mm_file
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| 145 | # If we exit here, then pluginfo.pl will exit too!
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| 146 | }
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[16692] | 147 | else {
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| 148 | $self->{'metadata_mapping'} = &marcmapping::parse_marc_metadata_mapping($mm_files, $outhandle);
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[3430] | 149 | }
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| 150 |
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[16692] | 151 | ##map { print STDERR $_."=>".$self->{'metadata_mapping'}->{$_}."\n"; } keys %{$self->{'metadata_mapping'}};
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[3430] | 152 |
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| 153 | $self->SUPER::init(@_);
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| 154 | }
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| 155 |
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[16692] | 156 |
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| 157 |
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[3430] | 158 | sub get_default_process_exp {
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| 159 | my $self = shift (@_);
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| 160 |
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| 161 | return q^(?i)(\.marc)$^;
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| 162 | }
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| 163 |
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| 164 |
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| 165 | sub get_default_split_exp {
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| 166 | # \r\n for msdos eol, \n for unix
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[13198] | 167 | return q^\r?\n\s*\r?\n|\[\w+\]Record type: USmarc^;
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[3430] | 168 | }
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| 169 |
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| 170 |
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| 171 |
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[4791] | 172 | # The bulk of this function is based on read_line in multiread.pm
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| 173 | # Unable to use read_line original because it expects to get its input
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| 174 | # from a file. Here the line to be converted is passed in as a string
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| 175 |
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| 176 | sub to_utf8
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| 177 | {
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| 178 | my $self = shift (@_);
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| 179 | my ($encoding, $line) = @_;
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| 180 |
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[14964] | 181 | if ($encoding eq "utf8") {
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| 182 | # nothing needs to be done
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[27106] | 183 | #return $line;
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| 184 | } elsif ($encoding eq "iso_8859_1") {
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[4791] | 185 | # we'll use ascii2utf8() for this as it's faster than going
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| 186 | # through convert2unicode()
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[27106] | 187 | #return &unicode::ascii2utf8 (\$line);
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| 188 | $line = &unicode::ascii2utf8 (\$line);
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| 189 | } else {
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| 190 |
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| 191 | # everything else uses unicode::convert2unicode
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| 192 | $line = &unicode::unicode2utf8 (&unicode::convert2unicode ($encoding, \$line));
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[4791] | 193 | }
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[27106] | 194 | # At this point $line is a binary byte string
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| 195 | # => turn it into a Unicode aware string, so full
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| 196 | # Unicode aware pattern matching can be used.
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| 197 | # For instance: 's/\x{0101}//g' or '[[:upper:]]'
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[4791] | 198 |
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[27106] | 199 | return decode ("utf8", $line);
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[4791] | 200 | }
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| 201 |
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| 202 |
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[3430] | 203 | sub read_file {
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| 204 | my $self = shift (@_);
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| 205 | my ($filename, $encoding, $language, $textref) = @_;
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| 206 |
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[16697] | 207 | my $outhandle = $self->{'outhandle'};
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| 208 |
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| 209 | if (! defined($self->{'metadata_mapping'}))
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| 210 | {
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| 211 | # print a warning
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[16970] | 212 | print $outhandle "MARCPlugin: no metadata mapping file! Can't extract metadata from $filename\n";
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[16697] | 213 | }
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| 214 |
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[9494] | 215 | $self->{'readfile_encoding'}->{$filename} = $encoding;
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[4791] | 216 |
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[13198] | 217 |
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[3430] | 218 | if (!-r $filename)
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| 219 | {
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| 220 | print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
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| 221 | return;
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| 222 | }
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| 223 |
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[13198] | 224 | ##handle ascii marc
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| 225 | #test whether this is ascii marc file
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| 226 | if (open (FILE, $filename)) {
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| 227 | while (defined (my $line = <FILE>)) {
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| 228 | $$textref .= $line;
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| 229 | if ($line =~ /\[\w+\]Record type:/){
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| 230 | undef $/;
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| 231 | $$textref .= <FILE>;
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| 232 | $/ = "\n";
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| 233 | $self->{'type'} = "ascii";
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| 234 | close FILE;
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| 235 | return;
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| 236 | }
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| 237 | }
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| 238 | close FILE;
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| 239 | }
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| 240 |
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| 241 |
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| 242 | $$textref = "";
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| 243 | my @marc_entries = ();
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| 244 |
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[3430] | 245 | my $batch = new MARC::Batch( 'USMARC', $filename );
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| 246 | while ( my $marc = $batch->next )
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| 247 | {
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[13198] | 248 | push(@marc_entries,$marc);
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[3430] | 249 | $$textref .= $marc->as_formatted();
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[15872] | 250 | $$textref .= "\n\n"; # for SplitTextFile - see default_split_exp above...
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[3430] | 251 | }
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| 252 |
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[9493] | 253 | $self->{'marc_entries'}->{$filename} = \@marc_entries;
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[3430] | 254 | }
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| 255 |
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| 256 |
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| 257 |
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| 258 | # do plugin specific processing of doc_obj
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[15872] | 259 | # This gets done for each record found by SplitTextFile in marc files.
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[3430] | 260 | sub process {
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| 261 | my $self = shift (@_);
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[6332] | 262 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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[9494] | 263 |
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[3430] | 264 | my $outhandle = $self->{'outhandle'};
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[9494] | 265 | my $filename = &util::filename_cat($base_dir, $file);
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[3430] | 266 |
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| 267 | my $cursection = $doc_obj->get_top_section();
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| 268 |
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[8121] | 269 | # Add fileFormat as the metadata
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| 270 | $doc_obj->add_metadata($cursection, "FileFormat", "MARC");
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| 271 |
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[9493] | 272 | my $marc_entries = $self->{'marc_entries'}->{$filename};
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[3430] | 273 | my $marc = shift(@$marc_entries);
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| 274 |
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[9494] | 275 | my $encoding = $self->{'readfile_encoding'}->{$filename};
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[16697] | 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 ($$textref,$metadata,$doc_obj, $cursection);
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| 282 | }
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[13198] | 283 | }
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| 284 |
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[3430] | 285 | # add spaces after the sub-field markers, for word boundaries
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| 286 | $$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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[4791] | 292 | $$textref = $self->to_utf8($encoding,$$textref);
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| 293 |
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[3430] | 294 | print $outhandle " Adding Marc Record:\n",substr($$textref,0,40), " ...\n"
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| 295 | if $self->{'verbosity'} > 2;
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| 296 |
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[7533] | 297 | # line wrapping
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[7553] | 298 | $$textref = &wrap_text_in_columns($$textref, 64);
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[3430] | 299 | $$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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[7547] | 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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[3430] | 314 |
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[10254] | 315 | foreach my $word (@words) {
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[7547] | 316 | # If printing this word would exceed the column end, start a new line
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| 317 | if (($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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[3430] | 330 |
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[7547] | 331 | $newtext .= "\n";
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| 332 | return $newtext;
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| 333 | }
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| 334 |
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[16692] | 335 | sub extract_metadata
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[3430] | 336 | {
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| 337 | my $self = shift (@_);
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[16692] | 338 |
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[9494] | 339 | my ($marc, $metadata, $encoding, $doc_obj, $section) = @_;
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[3430] | 340 | my $outhandle = $self->{'outhandle'};
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| 341 |
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[13198] | 342 | if (!defined $marc){
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| 343 | return;
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| 344 | }
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| 345 |
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[16692] | 346 | my $metadata_mapping = $self->{'metadata_mapping'};;
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[13198] | 347 |
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[29476] | 348 | foreach my $marc_field ( sort keys %$metadata_mapping )
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[3430] | 349 | {
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[16692] | 350 | my $gsdl_field = $metadata_mapping->{$marc_field};
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| 351 |
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| 352 | # have we got a subfield?
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| 353 | my $subfield = undef;
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| 354 | if ($marc_field =~ /(\d\d\d)(?:\$|\^)?(\w)/){
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| 355 | $marc_field = $1;
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| 356 | $subfield = $2;
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| 357 | }
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[27141] | 358 |
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| 359 | foreach my $meta_value_obj ($marc->field($marc_field)) {
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| 360 | my $meta_value;
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| 361 | if (defined($subfield)) {
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| 362 | $meta_value = $meta_value_obj->subfield($subfield);
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| 363 | } else {
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| 364 | $meta_value = $meta_value_obj->as_string();
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| 365 | }
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[16692] | 366 | if (defined $meta_value) {
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[18402] | 367 | # Square brackets in metadata values need to be escaped so they don't confuse Greenstone/GLI
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[28783] | 368 |
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| 369 | # Important! Check that this really works!! In MARCXMLPlugin
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| 370 | # it maps these characters to \\\\[ \\\\]
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| 371 |
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[18402] | 372 | $meta_value =~ s/\[/&\#091;/g;
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| 373 | $meta_value =~ s/\]/&\#093;/g;
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[16692] | 374 | my $metavalue_str = $self->to_utf8($encoding, $meta_value);
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| 375 | $doc_obj->add_utf8_metadata ($section, $gsdl_field, $metavalue_str);
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| 376 | }
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[18402] | 377 | }
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[3430] | 378 | }
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| 379 | }
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[13198] | 380 |
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[16692] | 381 |
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[13198] | 382 | sub extract_ascii_metadata
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| 383 | {
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| 384 | my $self = shift (@_);
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[16692] | 385 |
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[13198] | 386 | my ($text, $metadata,$doc_obj, $section) = @_;
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| 387 | my $outhandle = $self->{'outhandle'};
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| 388 | my $metadata_mapping = $self->{'metadata_mapping'};
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| 389 | ## get fields
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| 390 | my @fields = split(/[\n\r]+/,$text);
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| 391 | my $marc_mapping ={};
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| 392 |
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| 393 | foreach my $field (@fields){
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| 394 | if ($field ne ""){
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| 395 | $field =~ /^(\d\d\d)\s/;
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| 396 | my $code = $1;
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[16692] | 397 | $field = $'; #'
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[13198] | 398 | ##get subfields
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| 399 | my @subfields = split(/\$/,$field);
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| 400 | my $i=0;
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| 401 | $marc_mapping->{$code} = [];
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| 402 | foreach my $subfield (@subfields){
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| 403 | if ($i == 0){
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| 404 | ##print STDERR $subfield."\n";
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| 405 | push(@{$marc_mapping->{$code}},"info");
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| 406 | push(@{$marc_mapping->{$code}},$subfield);
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| 407 |
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| 408 | $i++;
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| 409 | }
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| 410 | else{
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| 411 | $subfield =~ /(\w)\s/;
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| 412 | ##print STDERR "$1=>$'\n";
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| 413 | push(@{$marc_mapping->{$code}},$1);
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[16692] | 414 | push(@{$marc_mapping->{$code}},$'); #'
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[13198] | 415 | }
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| 416 | }
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| 417 | }
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| 418 | }
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| 419 |
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| 420 |
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[16692] | 421 | foreach my $marc_field ( keys %$metadata_mapping )
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[13198] | 422 | {
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| 423 |
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| 424 | my $matched_field = $marc_mapping->{$marc_field};
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| 425 | my $subfield = undef;
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| 426 |
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| 427 | if (defined $matched_field){
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| 428 | ## test whether this field has subfield
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| 429 | if ($marc_field =~ /\d\d\d(\w)/){
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| 430 | $subfield = $1;
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| 431 | }
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[16692] | 432 | my $metaname = $metadata_mapping->{$marc_field};
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[13198] | 433 |
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| 434 | my $metavalue;
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| 435 | if (defined $subfield){
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| 436 | my %mapped_subfield = {@$matched_field};
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| 437 | $metavalue = $mapped_subfield{$subfield};
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| 438 | }
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| 439 | else{ ## get all values except info
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| 440 | my $i =0;
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| 441 | foreach my $value (@$matched_field){
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| 442 | if ($i%2 != 0 and $i != 1){
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| 443 | $metavalue .= $value." ";
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| 444 | }
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| 445 | $i++;
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| 446 | }
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| 447 | }
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| 448 |
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| 449 | ## escape [ and ]
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| 450 | $metavalue =~ s/\[/\\\[/g;
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| 451 | $metavalue =~ s/\]/\\\]/g;
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| 452 | ##print STDERR "$metaname=$metavalue\n";
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| 453 | $doc_obj->add_metadata ($section, $metaname, $metavalue) ;
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| 454 | }
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| 455 |
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| 456 | }
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| 457 |
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| 458 | }
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| 459 |
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| 460 |
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[3430] | 461 | 1;
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