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