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