| 1 | ###########################################################################
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| 2 | #
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| 3 | # doc.pm --
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| 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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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 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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| 26 | # base class to hold documents
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| 27 |
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| 28 | package doc;
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| 29 |
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| 30 | BEGIN {
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| 31 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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| 32 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/dynamic/lib/site_perl/5.005/i686-linux");
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| 33 | }
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| 34 |
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| 35 | use unicode;
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| 36 | use util;
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| 37 | use ghtml;
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| 38 | ##use hashdoc;
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| 39 |
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| 40 | # the document type may be indexed_doc, nonindexed_doc, or
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| 41 | # classification
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| 42 |
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| 43 | my $OIDcount = 0;
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| 44 |
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| 45 | sub new {
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| 46 | my $class = shift (@_);
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| 47 | my ($source_filename, $doc_type) = @_;
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| 48 |
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| 49 | my $self = bless {'associated_files'=>[],
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| 50 | 'subsection_order'=>[],
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| 51 | 'next_subsection'=>1,
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| 52 | 'subsections'=>{},
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| 53 | 'metadata'=>[],
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| 54 | 'text'=>"",
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| 55 | 'OIDtype'=>"hash"}, $class;
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| 56 |
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| 57 | $self->set_source_filename ($source_filename) if defined $source_filename;
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| 58 | $self->set_doc_type ($doc_type) if defined $doc_type;
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| 59 |
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| 60 | return $self;
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| 61 | }
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| 62 |
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| 63 | # clone the $self object
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| 64 | sub duplicate {
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| 65 | my $self = shift (@_);
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| 66 |
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| 67 | my $newobj = {};
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| 68 |
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| 69 | foreach $k (keys %$self) {
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| 70 | $newobj->{$k} = &clone ($self->{$k});
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| 71 | }
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| 72 |
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| 73 | bless $newobj, ref($self);
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| 74 | return $newobj;
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| 75 | }
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| 76 |
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| 77 | sub clone {
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| 78 | my ($from) = @_;
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| 79 | my $type = ref ($from);
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| 80 |
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| 81 | if ($type eq "HASH") {
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| 82 | my $to = {};
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| 83 | foreach $key (keys %$from) {
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| 84 | $to->{$key} = &clone ($from->{$key});
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| 85 | }
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| 86 | return $to;
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| 87 | } elsif ($type eq "ARRAY") {
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| 88 | my $to = [];
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| 89 | foreach $v (@$from) {
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| 90 | push (@$to, &clone ($v));
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| 91 | }
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| 92 | return $to;
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| 93 | } else {
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| 94 | return $from;
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | sub set_OIDtype {
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| 99 | my $self = shift (@_);
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| 100 | my ($type) = @_;
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| 101 |
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| 102 | if ($type eq "incremental") {
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| 103 | $self->{'OIDtype'} = $type;
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| 104 | } else {
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| 105 | $self->{'OIDtype'} = "hash";
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| 106 | }
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| 107 | }
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| 108 |
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| 109 | sub set_source_filename {
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| 110 | my $self = shift (@_);
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| 111 | my ($source_filename) = @_;
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| 112 |
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| 113 | $self->set_metadata_element ($self->get_top_section(),
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| 114 | "gsdlsourcefilename",
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| 115 | $source_filename);
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| 116 | }
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| 117 |
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| 118 | # returns the source_filename as it was provided
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| 119 | sub get_source_filename {
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| 120 | my $self = shift (@_);
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| 121 |
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| 122 | return $self->get_metadata_element ($self->get_top_section(), "gsdlsourcefilename");
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| 123 | }
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| 124 |
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| 125 | sub set_doc_type {
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| 126 | my $self = shift (@_);
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| 127 | my ($doc_type) = @_;
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| 128 |
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| 129 | $self->set_metadata_element ($self->get_top_section(),
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| 130 | "gsdldoctype",
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| 131 | $doc_type);
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| 132 | }
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| 133 |
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| 134 | # returns the source_filename as it was provided
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| 135 | # the default of "indexed_doc" is used if no document
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| 136 | # type was provided
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| 137 | sub get_doc_type {
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| 138 | my $self = shift (@_);
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| 139 |
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| 140 | my $doc_type = $self->get_metadata_element ($self->get_top_section(), "gsdldoctype");
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| 141 | return $doc_type if (defined $doc_type);
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| 142 | return "indexed_doc";
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| 143 | }
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| 144 |
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| 145 | sub _escape_text {
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| 146 | my ($text) = @_;
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| 147 |
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| 148 | # special characters in the gml encoding
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| 149 | $text =~ s/&/&/g; # this has to be first...
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| 150 | $text =~ s/</</g;
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| 151 | $text =~ s/>/>/g;
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| 152 | $text =~ s/\"/"/g;
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| 153 |
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| 154 | return $text;
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| 155 | }
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| 156 |
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| 157 | sub buffer_section_xml {
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| 158 | my $self = shift (@_);
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| 159 | my ($section) = @_;
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| 160 |
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| 161 | my $section_ptr = $self->_lookup_section ($section);
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| 162 | return "" unless defined $section_ptr;
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| 163 |
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| 164 | my $all_text = "<Section>\n";
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| 165 | $all_text .= " <Description>\n";
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| 166 |
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| 167 | # output metadata
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| 168 | foreach my $data (@{$section_ptr->{'metadata'}}) {
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| 169 | my $escaped_value = &_escape_text($data->[1]);
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| 170 | $all_text .= ' <Metadata name="' . $data->[0] . '">' . $escaped_value . "</Metadata>\n";
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| 171 | }
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| 172 |
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| 173 | $all_text .= " </Description>\n";
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| 174 |
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| 175 | # output the text
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| 176 | $all_text .= " <Content>\n";
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| 177 | $all_text .= &_escape_text($section_ptr->{'text'});
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| 178 | $all_text .= " </Content>\n";
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| 179 |
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| 180 | # output all the subsections
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| 181 | foreach my $subsection (@{$section_ptr->{'subsection_order'}}) {
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| 182 | $all_text .= $self->buffer_section_xml("$section.$subsection");
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| 183 | }
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| 184 |
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| 185 | $all_text .= "</Section>\n";
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| 186 |
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| 187 | # make sure no nasty control characters have snuck through
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| 188 | # (XML::Parser will barf on anything it doesn't consider to be
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| 189 | # valid UTF-8 text, including things like \c@, \cC etc.)
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| 190 | $all_text =~ s/[\x00-\x07\x14-\x1F]//g;
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| 191 |
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| 192 | return $all_text;
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| 193 | }
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| 194 |
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| 195 | sub output_section {
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| 196 | my $self = shift (@_);
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| 197 | my ($handle, $section) = @_;
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| 198 |
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| 199 | print $handle $self->buffer_section_xml($section);
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| 200 | }
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| 201 |
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| 202 | # look up the reference to the a particular section
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| 203 | sub _lookup_section {
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| 204 | my $self = shift (@_);
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| 205 | my ($section) = @_;
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| 206 |
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| 207 | my ($num);
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| 208 | my $sectionref = $self;
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| 209 |
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| 210 | while (defined $section && $section ne "") {
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| 211 | ($num, $section) = $section =~ /^\.?(\d+)(.*)$/;
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| 212 | $num =~ s/^0+(\d)/$1/; # remove leading 0s
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| 213 | $section = "" unless defined $section;
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| 214 |
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| 215 | if (defined $num && defined $sectionref->{'subsections'}->{$num}) {
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| 216 | $sectionref = $sectionref->{'subsections'}->{$num};
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| 217 | } else {
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| 218 | return undef;
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| 219 | }
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| 220 | }
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| 221 |
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| 222 | return $sectionref;
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| 223 | }
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| 224 |
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| 225 | # calculate OID by hashing the contents of the document
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| 226 | sub _calc_OID {
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| 227 | my $self = shift (@_);
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| 228 | my ($filename) = @_;
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| 229 |
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| 230 | my $osexe = &util::get_os_exe();
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| 231 |
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| 232 | my $hashfile_exe = &util::filename_cat($ENV{'GSDLHOME'},"bin",
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| 233 | $ENV{'GSDLOS'},"hashfile$osexe");
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| 234 | my $result = "NULL";
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| 235 |
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| 236 | if (-e "$hashfile_exe") {
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| 237 | # $result = `\"$hashfile_exe\" \"$filename\"`;
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| 238 | $result = `hashfile$osexe \"$filename\"`;
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| 239 | ($result) = $result =~ /:\s*([0-9a-f]+)/i;
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| 240 |
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| 241 | } else {
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| 242 | print STDERR "doc::_calc_OID $hashfile_exe could not be found\n";
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| 243 | }
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| 244 |
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| 245 | return "HASH$result";
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| 246 | }
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| 247 |
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| 248 | # methods dealing with OID, not groups of them.
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| 249 |
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| 250 | # if $OID is not provided one is calculated
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| 251 | sub set_OID {
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| 252 | my $self = shift (@_);
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| 253 | my ($OID) = @_;
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| 254 |
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| 255 | # if an OID wasn't provided claculate one
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| 256 | if (!defined $OID) {
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| 257 | $OID = "NULL";
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| 258 |
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| 259 | if ($self->{'OIDtype'} eq "incremental") {
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| 260 | $OID = "D" . $OIDcount;
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| 261 | $OIDcount ++;
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| 262 |
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| 263 | } else {
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| 264 | # "hash" OID - feed file to hashfile.exe
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| 265 | my $filename = $self->get_source_filename();
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| 266 | if (defined($filename) && -e $filename) {
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| 267 |
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| 268 | $OID = $self->_calc_OID ($filename);
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| 269 |
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| 270 | } else {
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| 271 | $filename = &util::get_tmp_filename();
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| 272 | if (!open (OUTFILE, ">$filename")) {
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| 273 | print STDERR "doc::set_OID could not write to $filename\n";
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| 274 | } else {
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| 275 | $self->output_section('OUTFILE', $self->get_top_section(),
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| 276 | undef, 1);
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| 277 | close (OUTFILE);
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| 278 | }
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| 279 |
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| 280 | $OID = $self->_calc_OID ($filename);
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| 281 | &util::rm ($filename);
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| 282 | }
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| 283 | }
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| 284 | }
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| 285 | $self->set_metadata_element ($self->get_top_section(), "Identifier", $OID);
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| 286 | }
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| 287 |
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| 288 | # this uses hashdoc (embedded c thingy) which is faster but still
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| 289 | # needs a little work to be suffiently stable
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| 290 | sub ___set_OID {
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| 291 | my $self = shift (@_);
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| 292 | my ($OID) = @_;
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| 293 |
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| 294 | # if an OID wasn't provided then calculate hash value based on document
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| 295 | if (!defined $OID)
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| 296 | {
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| 297 | my $hash_text = $self->buffer_section_gml($self->get_top_section(),
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| 298 | undef, 1);
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| 299 | my $hash_len = length($hash_text);
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| 300 |
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| 301 | $OID = &hashdoc::buffer($hash_text,$hash_len);
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| 302 | }
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| 303 |
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| 304 | $self->set_metadata_element ($self->get_top_section(), "Identifier", $OID);
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| 305 | }
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| 306 |
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| 307 | # returns the OID for this document
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| 308 | sub get_OID {
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| 309 | my $self = shift (@_);
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| 310 | my $OID = $self->get_metadata_element ($self->get_top_section(), "Identifier");
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| 311 | return $OID if (defined $OID);
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| 312 | return "NULL";
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| 313 | }
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| 314 |
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| 315 | sub delete_OID {
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| 316 | my $self = shift (@_);
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| 317 |
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| 318 | $self->set_metadata_element ($self->get_top_section(), "Identifier", "NULL");
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| 319 | }
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| 320 |
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| 321 |
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| 322 | # methods for manipulating section names
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| 323 |
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| 324 | # returns the name of the top-most section (the top
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| 325 | # level of the document
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| 326 | sub get_top_section {
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| 327 | my $self = shift (@_);
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| 328 |
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| 329 | return "";
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| 330 | }
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| 331 |
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| 332 | # returns a section
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| 333 | sub get_parent_section {
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| 334 | my $self = shift (@_);
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| 335 | my ($section) = @_;
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| 336 |
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| 337 | $section =~ s/(^|\.)\d+$//;
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| 338 |
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| 339 | return $section;
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| 340 | }
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| 341 |
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| 342 | # returns the first child section (or the end child
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| 343 | # if there isn't any)
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| 344 | sub get_begin_child {
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| 345 | my $self = shift (@_);
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| 346 | my ($section) = @_;
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| 347 |
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| 348 | my $section_ptr = $self->_lookup_section($section);
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| 349 | return "" unless defined $section_ptr;
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| 350 |
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| 351 | if (defined $section_ptr->{'subsection_order'}->[0]) {
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| 352 | return "$section.$section_ptr->{'subsection_order'}->[0]";
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| 353 | }
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| 354 |
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| 355 | return $self->get_end_child ($section);
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| 356 | }
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| 357 |
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| 358 | # returns the next child of a parent section
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| 359 | sub get_next_child {
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| 360 | my $self = shift (@_);
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| 361 | my ($section) = @_;
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| 362 |
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| 363 | my $parent_section = $self->get_parent_section($section);
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| 364 | my $parent_section_ptr = $self->_lookup_section($parent_section);
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| 365 | return undef unless defined $parent_section_ptr;
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| 366 |
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| 367 | my ($section_num) = $section =~ /(\d+)$/;
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| 368 | return undef unless defined $section_num;
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| 369 |
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| 370 | my $i = 0;
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| 371 | my $section_order = $parent_section_ptr->{'subsection_order'};
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| 372 | while ($i < scalar(@$section_order)) {
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| 373 | last if $section_order->[$i] eq $section_num;
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| 374 | $i++;
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| 375 | }
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| 376 |
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| 377 | $i++; # the next child
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| 378 | if ($i < scalar(@$section_order)) {
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| 379 | return $section_order->[$i] if $parent_section eq "";
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| 380 | return "$parent_section.$section_order->[$i]";
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| 381 | }
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| 382 |
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| 383 | # no more sections in this level
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| 384 | return undef;
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| 385 | }
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| 386 |
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| 387 | # returns a reference to a list of children
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| 388 | sub get_children {
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| 389 | my $self = shift (@_);
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| 390 | my ($section) = @_;
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| 391 |
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| 392 | my $section_ptr = $self->_lookup_section($section);
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| 393 | return [] unless defined $section_ptr;
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| 394 |
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| 395 | my @children = @{$section_ptr->{'subsection_order'}};
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| 396 |
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| 397 | map {$_ = "$section.$_"; $_ =~ s/^\.+//;} @children;
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| 398 | return \@children;
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| 399 | }
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| 400 |
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| 401 | # returns the child section one past the last one (which
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| 402 | # is coded as "0")
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| 403 | sub get_end_child {
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| 404 | my $self = shift (@_);
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| 405 | my ($section) = @_;
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| 406 |
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| 407 | return $section . ".0" unless $section eq "";
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| 408 | return "0";
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| 409 | }
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| 410 |
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| 411 | # returns the next section in book order
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| 412 | sub get_next_section {
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| 413 | my $self = shift (@_);
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| 414 | my ($section) = @_;
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| 415 |
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| 416 | return undef unless defined $section;
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| 417 |
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| 418 | my $section_ptr = $self->_lookup_section($section);
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| 419 | return undef unless defined $section_ptr;
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| 420 |
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| 421 | # first try to find first child
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| 422 | if (defined $section_ptr->{'subsection_order'}->[0]) {
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| 423 | return $section_ptr->{'subsection_order'}->[0] if ($section eq "");
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| 424 | return "$section.$section_ptr->{'subsection_order'}->[0]";
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| 425 | }
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| 426 |
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| 427 | do {
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| 428 | # try to find sibling
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| 429 | my $next_child = $self->get_next_child ($section);
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| 430 | return $next_child if (defined $next_child);
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| 431 |
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| 432 | # move up one level
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| 433 | $section = $self->get_parent_section ($section);
|
|---|
| 434 | } while $section =~ /\d/;
|
|---|
| 435 |
|
|---|
| 436 | return undef;
|
|---|
| 437 | }
|
|---|
| 438 |
|
|---|
| 439 | sub is_leaf_section {
|
|---|
| 440 | my $self = shift (@_);
|
|---|
| 441 | my ($section) = @_;
|
|---|
| 442 |
|
|---|
| 443 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 444 | return 1 unless defined $section_ptr;
|
|---|
| 445 |
|
|---|
| 446 | return (scalar (@{$section_ptr->{'subsection_order'}}) == 0);
|
|---|
| 447 | }
|
|---|
| 448 |
|
|---|
| 449 | # methods for dealing with sections
|
|---|
| 450 |
|
|---|
| 451 | # returns the name of the inserted section
|
|---|
| 452 | sub insert_section {
|
|---|
| 453 | my $self = shift (@_);
|
|---|
| 454 | my ($before_section) = @_;
|
|---|
| 455 |
|
|---|
| 456 | # get the child to insert before and its parent section
|
|---|
| 457 | my $parent_section = "";
|
|---|
| 458 | my $before_child = "0";
|
|---|
| 459 | my @before_section = split (/\./, $before_section);
|
|---|
| 460 | if (scalar(@before_section) > 0) {
|
|---|
| 461 | $before_child = pop (@before_section);
|
|---|
| 462 | $parent_section = join (".", @before_section);
|
|---|
| 463 | }
|
|---|
| 464 |
|
|---|
| 465 | my $parent_section_ptr = $self->_lookup_section($parent_section);
|
|---|
| 466 | if (!defined $parent_section_ptr) {
|
|---|
| 467 | print STDERR "doc::insert_section couldn't find parent section " .
|
|---|
| 468 | "$parent_section\n";
|
|---|
| 469 | return;
|
|---|
| 470 | }
|
|---|
| 471 |
|
|---|
| 472 | # get the next section number
|
|---|
| 473 | my $section_num = $parent_section_ptr->{'next_subsection'}++;
|
|---|
| 474 |
|
|---|
| 475 | my $i = 0;
|
|---|
| 476 | while ($i < scalar(@{$parent_section_ptr->{'subsection_order'}}) &&
|
|---|
| 477 | $parent_section_ptr->{'subsection_order'}->[$i] ne $before_child) {
|
|---|
| 478 | $i++;
|
|---|
| 479 | }
|
|---|
| 480 |
|
|---|
| 481 | # insert the section number into the order list
|
|---|
| 482 | splice (@{$parent_section_ptr->{'subsection_order'}}, $i, 0, $section_num);
|
|---|
| 483 |
|
|---|
| 484 | # add this section to the parent section
|
|---|
| 485 | my $section_ptr = {'subsection_order'=>[],
|
|---|
| 486 | 'next_subsection'=>1,
|
|---|
| 487 | 'subsections'=>{},
|
|---|
| 488 | 'metadata'=>[],
|
|---|
| 489 | 'text'=>""};
|
|---|
| 490 | $parent_section_ptr->{'subsections'}->{$section_num} = $section_ptr;
|
|---|
| 491 |
|
|---|
| 492 | # work out the full section number
|
|---|
| 493 | my $section = $parent_section;
|
|---|
| 494 | $section .= "." unless $section eq "";
|
|---|
| 495 | $section .= $section_num;
|
|---|
| 496 |
|
|---|
| 497 | return $section;
|
|---|
| 498 | }
|
|---|
| 499 |
|
|---|
| 500 | # creates a pre-named section
|
|---|
| 501 | sub create_named_section {
|
|---|
| 502 | my $self = shift (@_);
|
|---|
| 503 | my ($mastersection) = @_;
|
|---|
| 504 |
|
|---|
| 505 | my ($num);
|
|---|
| 506 | my $section = $mastersection;
|
|---|
| 507 | my $sectionref = $self;
|
|---|
| 508 |
|
|---|
| 509 | while ($section ne "") {
|
|---|
| 510 | ($num, $section) = $section =~ /^\.?(\d+)(.*)$/;
|
|---|
| 511 | $num =~ s/^0+(\d)/$1/; # remove leading 0s
|
|---|
| 512 | $section = "" unless defined $section;
|
|---|
| 513 |
|
|---|
| 514 | if (defined $num) {
|
|---|
| 515 | if (!defined $sectionref->{'subsections'}->{$num}) {
|
|---|
| 516 | push (@{$sectionref->{'subsection_order'}}, $num);
|
|---|
| 517 | $sectionref->{'subsections'}->{$num} = {'subsection_order'=>[],
|
|---|
| 518 | 'next_subsection'=>1,
|
|---|
| 519 | 'subsections'=>{},
|
|---|
| 520 | 'metadata'=>[],
|
|---|
| 521 | 'text'=>""};
|
|---|
| 522 | if ($num >= $sectionref->{'next_subsection'}) {
|
|---|
| 523 | $sectionref->{'next_subsection'} = $num + 1;
|
|---|
| 524 | }
|
|---|
| 525 | }
|
|---|
| 526 | $sectionref = $sectionref->{'subsections'}->{$num};
|
|---|
| 527 |
|
|---|
| 528 | } else {
|
|---|
| 529 | print STDERR "doc::create_named_section couldn't create section ";
|
|---|
| 530 | print STDERR "$mastersection\n";
|
|---|
| 531 | last;
|
|---|
| 532 | }
|
|---|
| 533 | }
|
|---|
| 534 | }
|
|---|
| 535 |
|
|---|
| 536 | # returns a reference to a list of subsections
|
|---|
| 537 | sub list_subsections {
|
|---|
| 538 | my $self = shift (@_);
|
|---|
| 539 | my ($section) = @_;
|
|---|
| 540 |
|
|---|
| 541 | my $section_ptr = $self->_lookup_section ($section);
|
|---|
| 542 | if (!defined $section_ptr) {
|
|---|
| 543 | print STDERR "doc::list_subsections couldn't find section $section\n";
|
|---|
| 544 | return [];
|
|---|
| 545 | }
|
|---|
| 546 |
|
|---|
| 547 | return [@{$section_ptr->{'subsection_order'}}];
|
|---|
| 548 | }
|
|---|
| 549 |
|
|---|
| 550 | sub delete_section {
|
|---|
| 551 | my $self = shift (@_);
|
|---|
| 552 | my ($section) = @_;
|
|---|
| 553 |
|
|---|
| 554 | # my $section_ptr = {'subsection_order'=>[],
|
|---|
| 555 | # 'next_subsection'=>1,
|
|---|
| 556 | # 'subsections'=>{},
|
|---|
| 557 | # 'metadata'=>[],
|
|---|
| 558 | # 'text'=>""};
|
|---|
| 559 |
|
|---|
| 560 | # if this is the top section reset everything
|
|---|
| 561 | if ($section eq "") {
|
|---|
| 562 | $self->{'subsection_order'} = [];
|
|---|
| 563 | $self->{'subsections'} = {};
|
|---|
| 564 | $self->{'metadata'} = [];
|
|---|
| 565 | $self->{'text'} = "";
|
|---|
| 566 | return;
|
|---|
| 567 | }
|
|---|
| 568 |
|
|---|
| 569 | # find the parent of the section to delete
|
|---|
| 570 | my $parent_section = "";
|
|---|
| 571 | my $child = "0";
|
|---|
| 572 | my @section = split (/\./, $section);
|
|---|
| 573 | if (scalar(@section) > 0) {
|
|---|
| 574 | $child = pop (@section);
|
|---|
| 575 | $parent_section = join (".", @section);
|
|---|
| 576 | }
|
|---|
| 577 |
|
|---|
| 578 | my $parent_section_ptr = $self->_lookup_section($parent_section);
|
|---|
| 579 | if (!defined $parent_section_ptr) {
|
|---|
| 580 | print STDERR "doc::delete_section couldn't find parent section " .
|
|---|
| 581 | "$parent_section\n";
|
|---|
| 582 | return;
|
|---|
| 583 | }
|
|---|
| 584 |
|
|---|
| 585 | # remove this section from the subsection_order list
|
|---|
| 586 | my $i = 0;
|
|---|
| 587 | while ($i < scalar (@{$parent_section_ptr->{'subsection_order'}})) {
|
|---|
| 588 | if ($parent_section_ptr->{'subsection_order'}->[$i] eq $child) {
|
|---|
| 589 | splice (@{$parent_section_ptr->{'subsection_order'}}, $i, 1);
|
|---|
| 590 | last;
|
|---|
| 591 | }
|
|---|
| 592 | $i++;
|
|---|
| 593 | }
|
|---|
| 594 |
|
|---|
| 595 | # remove this section from the subsection hash
|
|---|
| 596 | if (defined ($parent_section_ptr->{'subsections'}->{$child})) {
|
|---|
| 597 | undef $parent_section_ptr->{'subsections'}->{$child};
|
|---|
| 598 | }
|
|---|
| 599 | }
|
|---|
| 600 |
|
|---|
| 601 | #--
|
|---|
| 602 | # methods for dealing with metadata
|
|---|
| 603 |
|
|---|
| 604 | # set_metadata_element and get_metadata_element are for metadata
|
|---|
| 605 | # which should only have one value. add_meta_data and get_metadata
|
|---|
| 606 | # are for metadata which can have more than one value.
|
|---|
| 607 |
|
|---|
| 608 | # returns the first metadata value which matches field
|
|---|
| 609 | sub get_metadata_element {
|
|---|
| 610 | my $self = shift (@_);
|
|---|
| 611 | my ($section, $field) = @_;
|
|---|
| 612 | my ($data);
|
|---|
| 613 |
|
|---|
| 614 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 615 | if (!defined $section_ptr) {
|
|---|
| 616 | print STDERR "doc::get_metadata_element couldn't find section " .
|
|---|
| 617 | "$section\n";
|
|---|
| 618 | return;
|
|---|
| 619 | }
|
|---|
| 620 |
|
|---|
| 621 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
|---|
| 622 | return $data->[1] if (scalar(@$data) >= 2 && $data->[0] eq $field);
|
|---|
| 623 | }
|
|---|
| 624 |
|
|---|
| 625 | return undef; # was not found
|
|---|
| 626 | }
|
|---|
| 627 |
|
|---|
| 628 |
|
|---|
| 629 | # returns a list of the form [value1, value2, ...]
|
|---|
| 630 | sub get_metadata {
|
|---|
| 631 | my $self = shift (@_);
|
|---|
| 632 | my ($section, $field) = @_;
|
|---|
| 633 | my ($data);
|
|---|
| 634 |
|
|---|
| 635 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 636 | if (!defined $section_ptr) {
|
|---|
| 637 | print STDERR "doc::get_metadata couldn't find section " .
|
|---|
| 638 | "$section\n";
|
|---|
| 639 | return;
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | my @metadata = ();
|
|---|
| 643 | foreach $data (@{$section_ptr->{'metadata'}}) {
|
|---|
| 644 | push (@metadata, $data->[1]) if ($data->[0] eq $field);
|
|---|
| 645 | }
|
|---|
| 646 |
|
|---|
| 647 | return \@metadata;
|
|---|
| 648 | }
|
|---|
| 649 |
|
|---|
| 650 | # returns a list of the form [[field,value],[field,value],...]
|
|---|
| 651 | sub get_all_metadata {
|
|---|
| 652 | my $self = shift (@_);
|
|---|
| 653 | my ($section) = @_;
|
|---|
| 654 |
|
|---|
| 655 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 656 | if (!defined $section_ptr) {
|
|---|
| 657 | print STDERR "doc::get_all_metadata couldn't find section " .
|
|---|
| 658 | "$section\n";
|
|---|
| 659 | return;
|
|---|
| 660 | }
|
|---|
| 661 |
|
|---|
| 662 | return $section_ptr->{'metadata'};
|
|---|
| 663 | }
|
|---|
| 664 |
|
|---|
| 665 | # $value is optional
|
|---|
| 666 | sub delete_metadata {
|
|---|
| 667 | my $self = shift (@_);
|
|---|
| 668 | my ($section, $field, $value) = @_;
|
|---|
| 669 |
|
|---|
| 670 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 671 | if (!defined $section_ptr) {
|
|---|
| 672 | print STDERR "doc::delete_metadata couldn't find section " .
|
|---|
| 673 | "$section\n";
|
|---|
| 674 | return;
|
|---|
| 675 | }
|
|---|
| 676 |
|
|---|
| 677 | my $i = 0;
|
|---|
| 678 | while ($i < scalar (@{$section_ptr->{'metadata'}})) {
|
|---|
| 679 | if (($section_ptr->{'metadata'}->[$i]->[0] eq $field) &&
|
|---|
| 680 | (!defined $value || $section_ptr->{'metadata'}->[$i]->[1] eq $value)) {
|
|---|
| 681 | splice (@{$section_ptr->{'metadata'}}, $i, 1);
|
|---|
| 682 | } else {
|
|---|
| 683 | $i++;
|
|---|
| 684 | }
|
|---|
| 685 | }
|
|---|
| 686 | }
|
|---|
| 687 |
|
|---|
| 688 | sub delete_all_metadata {
|
|---|
| 689 | my $self = shift (@_);
|
|---|
| 690 | my ($section) = @_;
|
|---|
| 691 |
|
|---|
| 692 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 693 | if (!defined $section_ptr) {
|
|---|
| 694 | print STDERR "doc::delete_all_metadata couldn't find section " .
|
|---|
| 695 | "$section\n";
|
|---|
| 696 | return;
|
|---|
| 697 | }
|
|---|
| 698 |
|
|---|
| 699 | $section_ptr->{'metadata'} = [];
|
|---|
| 700 | }
|
|---|
| 701 |
|
|---|
| 702 | sub set_metadata_element {
|
|---|
| 703 | my $self = shift (@_);
|
|---|
| 704 | my ($section, $field, $value) = @_;
|
|---|
| 705 |
|
|---|
| 706 | $self->set_utf8_metadata_element ($section, $field,
|
|---|
| 707 | &unicode::ascii2utf8(\$value));
|
|---|
| 708 | }
|
|---|
| 709 |
|
|---|
| 710 | # set_utf8_metadata_element assumes the text has already been
|
|---|
| 711 | # converted to the UTF-8 encoding.
|
|---|
| 712 | sub set_utf8_metadata_element {
|
|---|
| 713 | my $self = shift (@_);
|
|---|
| 714 | my ($section, $field, $value) = @_;
|
|---|
| 715 |
|
|---|
| 716 | $self->delete_metadata ($section, $field);
|
|---|
| 717 | $self->add_utf8_metadata ($section, $field, $value);
|
|---|
| 718 | }
|
|---|
| 719 |
|
|---|
| 720 |
|
|---|
| 721 | # add_metadata assumes the text is in (extended) ascii form. For
|
|---|
| 722 | # text which hash been already converted to the UTF-8 format use
|
|---|
| 723 | # add_utf8_metadata.
|
|---|
| 724 | sub add_metadata {
|
|---|
| 725 | my $self = shift (@_);
|
|---|
| 726 | my ($section, $field, $value) = @_;
|
|---|
| 727 |
|
|---|
| 728 | $self->add_utf8_metadata ($section, $field,
|
|---|
| 729 | &unicode::ascii2utf8(\$value));
|
|---|
| 730 | }
|
|---|
| 731 |
|
|---|
| 732 | # add_utf8_metadata assumes the text has already been converted
|
|---|
| 733 | # to the UTF-8 encoding.
|
|---|
| 734 | sub add_utf8_metadata {
|
|---|
| 735 | my $self = shift (@_);
|
|---|
| 736 | my ($section, $field, $value) = @_;
|
|---|
| 737 |
|
|---|
| 738 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 739 | if (!defined $section_ptr) {
|
|---|
| 740 | print STDERR "doc::add_utf8_metadata couldn't find section " .
|
|---|
| 741 | "$section\n";
|
|---|
| 742 | return;
|
|---|
| 743 | }
|
|---|
| 744 | if (!defined $value) {
|
|---|
| 745 | print STDERR "doc::add_utf8_metadata undefined value for $field\n";
|
|---|
| 746 | return;
|
|---|
| 747 | }
|
|---|
| 748 | if (!defined $field) {
|
|---|
| 749 | print STDERR "doc::add_utf8_metadata undefined metadata type \n";
|
|---|
| 750 | return;
|
|---|
| 751 | }
|
|---|
| 752 |
|
|---|
| 753 | push (@{$section_ptr->{'metadata'}}, [$field, $value]);
|
|---|
| 754 | }
|
|---|
| 755 |
|
|---|
| 756 |
|
|---|
| 757 | # methods for dealing with text
|
|---|
| 758 |
|
|---|
| 759 | # returns the text for a section
|
|---|
| 760 | sub get_text {
|
|---|
| 761 | my $self = shift (@_);
|
|---|
| 762 | my ($section) = @_;
|
|---|
| 763 |
|
|---|
| 764 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 765 | if (!defined $section_ptr) {
|
|---|
| 766 | print STDERR "doc::get_text couldn't find section " .
|
|---|
| 767 | "$section\n";
|
|---|
| 768 | return "";
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | return $section_ptr->{'text'};
|
|---|
| 772 | }
|
|---|
| 773 |
|
|---|
| 774 | # returns the (utf-8 encoded) length of the text for a section
|
|---|
| 775 | sub get_text_length {
|
|---|
| 776 | my $self = shift (@_);
|
|---|
| 777 | my ($section) = @_;
|
|---|
| 778 |
|
|---|
| 779 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 780 | if (!defined $section_ptr) {
|
|---|
| 781 | print STDERR "doc::get_text_length couldn't find section " .
|
|---|
| 782 | "$section\n";
|
|---|
| 783 | return 0;
|
|---|
| 784 | }
|
|---|
| 785 |
|
|---|
| 786 | return length ($section_ptr->{'text'});
|
|---|
| 787 | }
|
|---|
| 788 |
|
|---|
| 789 | sub delete_text {
|
|---|
| 790 | my $self = shift (@_);
|
|---|
| 791 | my ($section) = @_;
|
|---|
| 792 |
|
|---|
| 793 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 794 | if (!defined $section_ptr) {
|
|---|
| 795 | print STDERR "doc::delete_text couldn't find section " .
|
|---|
| 796 | "$section\n";
|
|---|
| 797 | return;
|
|---|
| 798 | }
|
|---|
| 799 |
|
|---|
| 800 | $section_ptr->{'text'} = "";
|
|---|
| 801 | }
|
|---|
| 802 |
|
|---|
| 803 | # add_text assumes the text is in (extended) ascii form. For
|
|---|
| 804 | # text which has been already converted to the UTF-8 format
|
|---|
| 805 | # use add_utf8_text.
|
|---|
| 806 | sub add_text {
|
|---|
| 807 | my $self = shift (@_);
|
|---|
| 808 | my ($section, $text) = @_;
|
|---|
| 809 |
|
|---|
| 810 | # convert the text to UTF-8 encoded unicode characters
|
|---|
| 811 | # and add the text
|
|---|
| 812 | $self->add_utf8_text($section, &unicode::ascii2utf8(\$text));
|
|---|
| 813 | }
|
|---|
| 814 |
|
|---|
| 815 |
|
|---|
| 816 | # add_utf8_text assumes the text to be added has already
|
|---|
| 817 | # been converted to the UTF-8 encoding. For ascii text use
|
|---|
| 818 | # add_text
|
|---|
| 819 | sub add_utf8_text {
|
|---|
| 820 | my $self = shift (@_);
|
|---|
| 821 | my ($section, $text) = @_;
|
|---|
| 822 |
|
|---|
| 823 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 824 | if (!defined $section_ptr) {
|
|---|
| 825 | print STDERR "doc::add_utf8_text couldn't find section " .
|
|---|
| 826 | "$section\n";
|
|---|
| 827 | return;
|
|---|
| 828 | }
|
|---|
| 829 |
|
|---|
| 830 | $section_ptr->{'text'} .= $text;
|
|---|
| 831 | }
|
|---|
| 832 |
|
|---|
| 833 |
|
|---|
| 834 | # methods for dealing with associated files
|
|---|
| 835 |
|
|---|
| 836 | # a file is associated with a document, NOT a section.
|
|---|
| 837 | # if section is defined it is noted in the data structure
|
|---|
| 838 | # only so that files associated from a particular section
|
|---|
| 839 | # may be removed later (using delete_section_assoc_files)
|
|---|
| 840 | sub associate_file {
|
|---|
| 841 | my $self = shift (@_);
|
|---|
| 842 | my ($real_filename, $assoc_filename, $mime_type, $section) = @_;
|
|---|
| 843 | $mime_type = &ghtml::guess_mime_type ($real_filename) unless defined $mime_type;
|
|---|
| 844 |
|
|---|
| 845 | # remove all associated files with the same name
|
|---|
| 846 | $self->delete_assoc_file ($assoc_filename);
|
|---|
| 847 |
|
|---|
| 848 | push (@{$self->{'associated_files'}},
|
|---|
| 849 | [$real_filename, $assoc_filename, $mime_type, $section]);
|
|---|
| 850 | }
|
|---|
| 851 |
|
|---|
| 852 | # returns a list of associated files in the form
|
|---|
| 853 | # [[real_filename, assoc_filename, mimetype], ...]
|
|---|
| 854 | sub get_assoc_files {
|
|---|
| 855 | my $self = shift (@_);
|
|---|
| 856 |
|
|---|
| 857 | return $self->{'associated_files'};
|
|---|
| 858 | }
|
|---|
| 859 |
|
|---|
| 860 | sub delete_section_assoc_files {
|
|---|
| 861 | my $self = shift (@_);
|
|---|
| 862 | my ($section) = @_;
|
|---|
| 863 |
|
|---|
| 864 | my $i=0;
|
|---|
| 865 | while ($i < scalar (@{$self->{'associated_files'}})) {
|
|---|
| 866 | if (defined $self->{'associated_files'}->[$i]->[3] &&
|
|---|
| 867 | $self->{'associated_files'}->[$i]->[3] eq $section) {
|
|---|
| 868 | splice (@{$self->{'associated_files'}}, $i, 1);
|
|---|
| 869 | } else {
|
|---|
| 870 | $i++;
|
|---|
| 871 | }
|
|---|
| 872 | }
|
|---|
| 873 | }
|
|---|
| 874 |
|
|---|
| 875 | sub delete_assoc_file {
|
|---|
| 876 | my $self = shift (@_);
|
|---|
| 877 | my ($assoc_filename) = @_;
|
|---|
| 878 |
|
|---|
| 879 | my $i=0;
|
|---|
| 880 | while ($i < scalar (@{$self->{'associated_files'}})) {
|
|---|
| 881 | if ($self->{'associated_files'}->[$i]->[1] eq $assoc_filename) {
|
|---|
| 882 | splice (@{$self->{'associated_files'}}, $i, 1);
|
|---|
| 883 | } else {
|
|---|
| 884 | $i++;
|
|---|
| 885 | }
|
|---|
| 886 | }
|
|---|
| 887 | }
|
|---|
| 888 |
|
|---|
| 889 | sub reset_nextsection_ptr {
|
|---|
| 890 | my $self = shift (@_);
|
|---|
| 891 | my ($section) = @_;
|
|---|
| 892 |
|
|---|
| 893 | my $section_ptr = $self->_lookup_section($section);
|
|---|
| 894 | $section_ptr->{'next_subsection'} = 1;
|
|---|
| 895 | }
|
|---|
| 896 |
|
|---|
| 897 | 1;
|
|---|
