| 1 |
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| 2 | ###########################################################################
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| 3 | #
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| 4 | # GreenstoneXMLPlugin.pm
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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) 2001 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 | # Processes GreenstoneArchive XML documents. Note that this plugin does no
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| 28 | # syntax checking (though the XML::Parser module tests for
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| 29 | # well-formedness). It's assumed that the GreenstoneArchive files conform
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| 30 | # to their DTD.
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| 31 |
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| 32 | package GreenstoneXMLPlugin;
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| 33 |
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| 34 | use Encode;
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| 35 | use File::Basename;
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| 36 |
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| 37 | use ReadXMLFile;
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| 38 |
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| 39 | use strict;
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| 40 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 41 |
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| 42 | sub BEGIN {
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| 43 | @GreenstoneXMLPlugin::ISA = ('ReadXMLFile');
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| 44 | }
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| 45 |
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| 46 |
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| 47 |
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| 48 |
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| 49 | sub get_default_process_exp {
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| 50 | my $self = shift (@_);
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| 51 |
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| 52 | return q^(?i)doc\.xml$^;
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| 53 | }
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| 54 |
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| 55 | my $arguments =
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| 56 | [ { 'name' => "process_exp",
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| 57 | 'desc' => "{BasePlugin.process_exp}",
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| 58 | 'type' => "regexp",
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| 59 | 'deft' => &get_default_process_exp(),
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| 60 | 'reqd' => "no" } ];
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| 61 |
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| 62 | my $options = { 'name' => "GreenstoneXMLPlugin",
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| 63 | 'desc' => "{GreenstoneXMLPlugin.desc}",
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| 64 | 'abstract' => "no",
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| 65 | 'inherits' => "yes",
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| 66 | 'args' => $arguments };
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| 67 |
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| 68 | sub new {
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| 69 | my ($class) = shift (@_);
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| 70 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 71 | push(@$pluginlist, $class);
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| 72 |
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| 73 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 74 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 75 |
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| 76 | my $self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
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| 77 |
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| 78 | $self->{'section'} = "";
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| 79 | $self->{'section_level'} = 0;
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| 80 | $self->{'metadata_name'} = "";
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| 81 | $self->{'metadata_value'} = "";
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| 82 | $self->{'content'} = "";
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| 83 | $self->{'metadata_read_store'} = {};
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| 84 |
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| 85 | # # Currently used to store information for previous values controls. In
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| 86 | # # the next contract I'll move to using information directly from Lucene.
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| 87 | # $self->{'sqlfh'} = 0;
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| 88 |
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| 89 | return bless $self, $class;
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| 90 | }
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| 91 |
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| 92 |
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| 93 |
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| 94 |
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| 95 | sub metadata_read {
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| 96 | my $self = shift (@_);
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| 97 | my ($pluginfo, $base_dir, $file, $block_hash,
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| 98 | $extrametakeys, $extrametadata, $extrametafile,
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| 99 | $processor, $gli, $aux) = @_;
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| 100 |
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| 101 | my $outhandle = $self->{'outhandle'};
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| 102 |
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| 103 | # can we process this file??
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| 104 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 105 | return undef unless $self->can_process_this_file($filename_full_path);
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| 106 |
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| 107 | $file =~ s/^[\/\\]+//; # $file often begins with / so we'll tidy it up
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| 108 |
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| 109 | print $outhandle "GreenstoneXMLlugin: setting up block list for $file\n"
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| 110 | if $self->{'verbosity'} > 1;
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| 111 |
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| 112 | my $line;
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| 113 | if (open(GIN,"<:utf8",$filename_full_path)) {
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| 114 |
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| 115 | while (defined($line=<GIN>)) {
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| 116 | if ($line =~ m@<Metadata\s+name="gsdlassocfile">([^:]*):(?:[^:]*):(?:[^:]*)</Metadata>@) {
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| 117 | my $gsdl_assoc_file = $1;
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| 118 |
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| 119 | my $dirname = dirname($filename_full_path);
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| 120 | my $full_gsdl_assoc_filename = &util::filename_cat($dirname,$gsdl_assoc_file);
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| 121 | if ($self->{'verbosity'}>2) {
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| 122 | print $outhandle " Storing block list item: $full_gsdl_assoc_filename\n";
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| 123 | }
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| 124 |
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| 125 | $block_hash->{'file_blocks'}->{$full_gsdl_assoc_filename} = 1;
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| 126 | }
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| 127 | }
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| 128 |
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| 129 | close(GIN);
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| 130 | }
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| 131 | else {
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| 132 |
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| 133 | print $outhandle "Error: Failed to open $file in GreenstoneXMLPlugin::metadata_read()\n";
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| 134 | print $outhandle " $!\n";
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| 135 | }
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| 136 |
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| 137 |
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| 138 | $self->{'metadata_read_store'}->{$filename_full_path} = 1;
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| 139 |
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| 140 | return 1;
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| 141 | }
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| 142 |
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| 143 |
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| 144 | sub xml_start_document {
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| 145 | }
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| 146 |
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| 147 | sub xml_end_document {
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| 148 | }
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| 149 |
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| 150 | sub get_doctype {
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| 151 | my $self = shift(@_);
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| 152 |
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| 153 | return "(Greenstone)?Archive";
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| 154 | }
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| 155 |
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| 156 |
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| 157 | sub xml_doctype {
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| 158 | my $self = shift(@_);
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| 159 |
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| 160 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
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| 161 |
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| 162 | # allow the short-lived and badly named "GreenstoneArchive" files to be processed
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| 163 | # as well as the "Archive" files which should now be created by import.pl
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| 164 | die "" if ($name !~ /^(Greenstone)?Archive$/);
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| 165 |
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| 166 | my $outhandle = $self->{'outhandle'};
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| 167 | print $outhandle "GreenstoneXMLPlugin: processing $self->{'file'}\n" if $self->{'verbosity'} > 1;
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| 168 | print STDERR "<Processing n='$self->{'file'}' p='GreenstoneXMLPlugin'>\n" if $self->{'gli'};
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| 169 |
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| 170 | }
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| 171 |
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| 172 |
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| 173 | sub xml_start_tag {
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| 174 | my $self = shift(@_);
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| 175 | my ($expat, $element) = @_;
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| 176 |
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| 177 | $self->{'element'} = $element;
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| 178 | if ($element eq "Section") {
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| 179 | if ($self->{'section_level'} == 0) {
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| 180 | $self->open_document();
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| 181 | } else {
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| 182 | my $doc_obj = $self->{'doc_obj'};
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| 183 | $self->{'section'} =
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| 184 | $doc_obj->insert_section($doc_obj->get_end_child($self->{'section'}));
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| 185 | }
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| 186 |
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| 187 | $self->{'section_level'} ++;
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| 188 | }
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| 189 | elsif ($element eq "Metadata") {
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| 190 | $self->{'metadata_name'} = $_{'name'};
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| 191 | }
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| 192 | }
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| 193 |
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| 194 | sub xml_end_tag {
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| 195 | my $self = shift(@_);
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| 196 | my ($expat, $element) = @_;
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| 197 |
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| 198 | if ($element eq "Section") {
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| 199 | $self->{'section_level'} --;
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| 200 | $self->{'section'} = $self->{'doc_obj'}->get_parent_section ($self->{'section'});
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| 201 | $self->close_document() if $self->{'section_level'} == 0;
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| 202 | }
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| 203 | elsif ($element eq "Metadata") {
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| 204 | # text read in by XML::Parser is in Perl's binary byte value
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| 205 | # form ... need to explicitly make it UTF-8
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| 206 |
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| 207 | my $metadata_name = decode("utf-8",$self->{'metadata_name'});
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| 208 | my $metadata_value = decode("utf-8",$self->{'metadata_value'});
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| 209 |
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| 210 | $self->{'doc_obj'}->add_utf8_metadata($self->{'section'},
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| 211 | $metadata_name,$metadata_value);
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| 212 |
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| 213 | # Ensure this value is added to the allvalues database in gseditor.
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| 214 | # Note that the database constraints prevent multiple occurances of the
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| 215 | # same key-value pair.
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| 216 | # We write these out to a file, so they can all be commited in one
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| 217 | # transaction
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| 218 | #if (!$self->{'sqlfh'})
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| 219 | # {
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| 220 | # my $sql_file = $ENV{'GSDLHOME'} . "/collect/lld/tmp/gseditor.sql";
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| 221 | # # If the file doesn't already exist, open it and begin a transaction
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| 222 | # my $sql_fh;
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| 223 | # if (!-e $sql_file)
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| 224 | # {
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| 225 | # open($sql_fh, ">" . $sql_file);
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| 226 | # print $sql_fh "BEGIN TRANSACTION;\n";
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| 227 | # }
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| 228 | # else
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| 229 | # {
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| 230 | # open($sql_fh, ">>" . $sql_file);
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| 231 | # }
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| 232 | # print STDERR "Opened SQL log\n";
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| 233 | # $self->{'sqlfh'} = $sql_fh;
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| 234 | # }
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| 235 |
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| 236 | #my $mvalue = $self->{'metadata_value'};
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| 237 | #$mvalue =~ s/\'/\'\'/g;
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| 238 | #$mvalue =~ s/_claimantsep_/ \& /g;
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| 239 |
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| 240 | #my $fh = $self->{'sqlfh'};
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| 241 | #if ($fh)
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| 242 | # {
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| 243 | # print $fh "INSERT INTO allvalues (mkey, mvalue) VALUES ('" . $self->{'metadata_name'} . "', '" . $mvalue . "');\n";
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| 244 | # }
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| 245 |
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| 246 | # Clean Up
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| 247 | $self->{'metadata_name'} = "";
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| 248 | $self->{'metadata_value'} = "";
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| 249 | }
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| 250 | elsif ($element eq "Content" && $self->{'content'} ne "") {
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| 251 |
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| 252 | # text read in by XML::Parser is in Perl's binary byte value
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| 253 | # form ... need to explicitly make it UTF-8
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| 254 | my $content = decode("utf-8",$self->{'content'});
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| 255 |
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| 256 | $self->{'doc_obj'}->add_utf8_text($self->{'section'}, $content);
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| 257 | $self->{'content'} = "";
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| 258 | }
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| 259 | $self->{'element'} = "";
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| 260 | }
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| 261 |
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| 262 | sub xml_text {
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| 263 | my $self = shift(@_);
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| 264 | my ($expat) = @_;
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| 265 |
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| 266 | if ($self->{'element'} eq "Metadata") {
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| 267 | $self->{'metadata_value'} .= $_;
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| 268 | }
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| 269 | elsif ($self->{'element'} eq "Content") {
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| 270 | $self->{'content'} .= $_;
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | sub open_document {
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| 275 | my $self = shift(@_);
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| 276 |
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| 277 | my $filename = $self->{'filename'};
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| 278 |
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| 279 | # create a new document
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| 280 | if (defined $self->{'metadata_read_store'}->{$filename}) {
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| 281 | # Being processed as part of *import* phase
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| 282 | # (i.e. was in import directory)
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| 283 | $self->SUPER::open_document(@_);
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| 284 | delete $self->{'metadata_read_store'}->{$filename};
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| 285 | }
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| 286 | else {
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| 287 | # Otherwise being processed as part of the *buildcol* phase
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| 288 | # (i.e. named directly by ArchiveInf plugin)
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| 289 | $self->{'doc_obj'} = new doc();
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| 290 | }
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| 291 |
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| 292 | $self->{'section'} = "";
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| 293 | }
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| 294 |
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| 295 | sub close_document {
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| 296 | my $self = shift(@_);
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| 297 |
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| 298 | # add the associated files
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| 299 | my $assoc_files =
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| 300 | $self->{'doc_obj'}->get_metadata($self->{'doc_obj'}->get_top_section(), "gsdlassocfile");
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| 301 |
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| 302 | # for when "assocfilepath" isn't the same directory that doc.xml is in...
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| 303 | my $assoc_filepath_list= $self->{'doc_obj'}->get_metadata($self->{'doc_obj'}->get_top_section(), "assocfilepath");
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| 304 |
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| 305 | my $assoc_filepath=shift (@$assoc_filepath_list);
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| 306 |
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| 307 | #rint STDERR "Filename is: " . $self->{'filename'} . "\n";
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| 308 | #rint STDERR "Initially my assoc_filepath is: $assoc_filepath\n";
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| 309 | #rint STDERR "Custom archive dir is: " . $self->{'base_dir'} . "\n";
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| 310 | # Correct the assoc filepath if one is defined
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| 311 | if (defined ($assoc_filepath))
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| 312 | {
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| 313 | # Check whether the assoc_filepath already includes the base dir
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| 314 | if (index($assoc_filepath, $self->{'base_dir'}) == -1)
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| 315 | {
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| 316 | # And if not, append it so as to make this absolute
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| 317 | $assoc_filepath = &util::filename_cat($self->{'base_dir'}, $assoc_filepath);
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| 318 | }
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| 319 | }
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| 320 | else
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| 321 | {
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| 322 | $assoc_filepath = $self->{'filename'};
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| 323 | $assoc_filepath =~ s/[^\\\/]*$//;
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| 324 | }
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| 325 | #rint STDERR "Goned and made it absolute: $assoc_filepath\n";
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| 326 |
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| 327 | foreach my $assoc_file_info (@$assoc_files) {
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| 328 | my ($assoc_file, $mime_type, $dir) = split (":", $assoc_file_info);
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| 329 | #rint STDERR "assoc_file: $assoc_file\n";
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| 330 | #rint STDERR "mime_type: $mime_type\n";
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| 331 | #rint STDERR "dir: $dir\n";
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| 332 | my $real_dir = &util::filename_cat($assoc_filepath, $assoc_file),
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| 333 | my $assoc_dir = (defined $dir && $dir ne "")
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| 334 | ? &util::filename_cat($dir, $assoc_file) : $assoc_file;
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| 335 | $self->{'doc_obj'}->associate_file($real_dir, $assoc_dir, $mime_type);
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| 336 | #rint STDERR "According to me the real assoc_filepath is: $real_dir\n";
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| 337 | }
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| 338 | $self->{'doc_obj'}->delete_metadata($self->{'doc_obj'}->get_top_section(), "gsdlassocfile");
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| 339 |
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| 340 | # process the document
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| 341 | $self->{'processor'}->process($self->{'doc_obj'}, $self->{'file'});
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| 342 | }
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| 343 |
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| 344 |
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| 345 | 1;
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| 346 |
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| 347 |
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