[782] | 1 | ###########################################################################
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| 2 | #
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[13170] | 3 | # docprint.pm --
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[782] | 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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[13170] | 8 | # Copyright (C) 2006 New Zealand Digital Library Project
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[782] | 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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[13170] | 26 | # This is used to output an XML representation of a doc_obj - this will be
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[17747] | 27 | # Greenstone XML format.
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| 28 | # This is used by GreenstoneXMLPlugout and doc.pm
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[782] | 29 |
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| 30 | package docprint;
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| 31 |
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[32514] | 32 | use constant OUTPUT_NONE => 0;
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[32512] | 33 | use constant OUTPUT_META_ONLY => 1;
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| 34 | use constant OUTPUT_TEXT_ONLY => 2;
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| 35 | use constant OUTPUT_ALL => 3;
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| 36 |
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[13170] | 37 | use strict;
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[782] | 38 |
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[13170] | 39 | sub get_section_xml {
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[32512] | 40 | return &get_section_xml_from_root(@_);
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| 41 | }
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| 42 |
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| 43 | sub get_section_xml_from_root {
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| 44 | my ($doc_obj, $options) = @_;
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[32514] | 45 | return &recursive_get_section_xml($doc_obj, $doc_obj->get_top_section(), $options);
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[32512] | 46 | }
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| 47 |
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| 48 | sub recursive_get_section_xml {
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| 49 | my ($doc_obj, $section, $options) = @_;
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[13170] | 50 |
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[32514] | 51 | # 'output' can be OUTPUT_ALL|OUTPUT_META_ONLY|OUTPUT_TEXT_ONLY|OUTPUT_NONE
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[32512] | 52 | # If not provided, it defaults to OUTPUT_ALL.
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| 53 | # If OUTPUT_ALL, the metadata and full text both go into doc.xml
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| 54 | # If OUTPUT_META_ONLY, the metadata goes into doc.xml and full text goes elsewhere (mysql db).
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| 55 | # If OUTPUT_TEXT_ONLY, the full text goes into doc.xml and metadata goes elsewhere (mysql db).
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[32514] | 56 | # If OUTPUT_NONE, the full text and metadata goes elsewhere (mysql db)
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| 57 | # In the last 3 cases, an XML comment is left behind as a 'breadcrumb' to indicate
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| 58 | # that the "missing" doc information is stored elsewhere.
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[32512] | 59 | if(!defined $options) {
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[32514] | 60 | $options = { 'output' => OUTPUT_ALL };
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[32512] | 61 | }
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| 62 |
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[13170] | 63 | my $section_ptr = $doc_obj->_lookup_section ($section);
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| 64 | return "" unless defined $section_ptr;
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[782] | 65 |
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[13170] | 66 | my $all_text = "<Section>\n";
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| 67 | $all_text .= " <Description>\n";
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[32512] | 68 |
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[32518] | 69 | # scalar comparisons on a constant is allowed (but not string evaluation of scalars)
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| 70 | # https://www.perlmonks.org/?node_id=559456
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[32512] | 71 | if($options->{'output'} == OUTPUT_ALL || $options->{'output'} == OUTPUT_META_ONLY) {
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| 72 | # output metadata
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| 73 | foreach my $data (@{$section_ptr->{'metadata'}}) {
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| 74 | my $escaped_value = &escape_text($data->[1]);
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| 75 | $all_text .= ' <Metadata name="' . $data->[0] . '">' . $escaped_value . "</Metadata>\n";
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| 76 | }
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| 77 | } else {
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| 78 | $all_text .= "<!-- metadata is stored elsewhere (MySQL database) -->\n";
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[13170] | 79 | }
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[782] | 80 |
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[13170] | 81 | $all_text .= " </Description>\n";
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[782] | 82 |
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[13170] | 83 | # output the text
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| 84 | $all_text .= " <Content>";
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[32512] | 85 | if($options->{'output'} == OUTPUT_ALL || $options->{'output'} == OUTPUT_TEXT_ONLY) {
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| 86 | $all_text .= &escape_text($section_ptr->{'text'});
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| 87 | } else {
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| 88 | $all_text .= "<!-- full text is stored elsewhere (MySQL database) -->\n";
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| 89 | }
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[13170] | 90 | $all_text .= "</Content>\n";
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| 91 |
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| 92 | # output all the subsections
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| 93 | foreach my $subsection (@{$section_ptr->{'subsection_order'}}) {
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[32512] | 94 | $all_text .= &recursive_get_section_xml($doc_obj, "$section.$subsection");
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[782] | 95 | }
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| 96 |
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[13170] | 97 | $all_text .= "</Section>\n";
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| 98 |
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| 99 | # make sure no nasty control characters have snuck through
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| 100 | # (XML::Parser will barf on anything it doesn't consider to be
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| 101 | # valid UTF-8 text, including things like \c@, \cC etc.)
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| 102 | $all_text =~ s/[\x00-\x09\x0B\x0C\x0E-\x1F]//g;
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| 103 |
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| 104 | return $all_text;
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[782] | 105 | }
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| 106 |
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[13170] | 107 | sub escape_text {
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| 108 | my ($text) = @_;
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| 109 | # special characters in the xml encoding
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[19214] | 110 | $text =~ s/&&/& &/g;
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[13170] | 111 | $text =~ s/&/&/g; # this has to be first...
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| 112 | $text =~ s/</</g;
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| 113 | $text =~ s/>/>/g;
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| 114 | $text =~ s/\"/"/g;
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[782] | 115 |
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[13170] | 116 | return $text;
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| 117 | }
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| 118 |
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[782] | 119 | 1;
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