1 | ###########################################################################
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2 | #
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3 | # ProtemixPlug.pm --
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4 | #
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5 | # A component of the Greenstone digital library software
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6 | # from the New Zealand Digital Library Project at the
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7 | # University of Waikato, New Zealand.
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8 | #
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9 | # Copyright (C) 2002 New Zealand Digital Library Project
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10 | #
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11 | # This program is free software; you can redistribute it and/or modify
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12 | # it under the terms of the GNU General Public License as published by
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13 | # the Free Software Foundation; either version 2 of the License, or
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14 | # (at your option) any later version.
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15 | #
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16 | # This program is distributed in the hope that it will be useful,
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17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | # GNU General Public License for more details.
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20 | #
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21 | # You should have received a copy of the GNU General Public License
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22 | # along with this program; if not, write to the Free Software
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23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | #
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25 | ###########################################################################
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26 |
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27 | package ProtemixPlug;
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28 |
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29 | use HTMLPlug;
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30 | use util;
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31 |
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32 | sub BEGIN {
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33 | @ISA = ('HTMLPlug');
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34 | }
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35 |
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36 | use XML::Parser;
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37 |
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38 | sub new {
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39 | my $class = shift (@_);
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40 |
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41 | # $self must be global for XML parser routines
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42 | $self = new HTMLPlug ($class, @_);
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43 |
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44 | $self->{'no_metadata'} = 1;
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45 | $self->{'nolinks'} = 1;
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46 | $self->{'section_metadata'} = {};
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47 | $self->{'Page'} = "TopLevel";
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48 | $self->{'metadata_name'} = "";
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49 |
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50 | return bless $self, $class;
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51 | }
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52 |
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53 | sub read {
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54 | my $self = shift (@_);
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55 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs) = @_;
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56 |
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57 | my $filename = $file;
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58 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
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59 |
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60 | return 0 if $filename =~ /\.(pdf|html?|jpe?g)$/i;
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61 | return undef unless $filename =~ /meta\.xml$/;
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62 |
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63 | # create a new document
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64 | my $doc_obj = new doc ($filename, "indexed_doc");
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65 | $doc_obj->set_OIDtype ($processor->{'OIDtype'});
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66 | my $topsection = $doc_obj->get_top_section();
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67 |
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68 | # process the meta.xml file and set top level metadata
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69 | my $parser = new XML::Parser('Style' => 'Stream');
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70 | $self->{'section_metadata'} = {};
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71 | $self->{'Page'} = "TopLevel";
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72 | $parser->parsefile($filename);
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73 | foreach my $key (keys %{$self->{'section_metadata'}->{'TopLevel'}}) {
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74 | $doc_obj->add_utf8_metadata ($topsection, $key, $self->{'section_metadata'}->{'TopLevel'}->{$key});
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75 | }
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76 |
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77 | # read in directory and process individual files
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78 | my $dir = File::Basename::dirname($filename);
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79 |
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80 | opendir(DIR, $dir) || die;
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81 | my @files = readdir DIR;
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82 | closedir DIR;
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83 |
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84 |
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85 | # we rely on the files being named in such a way that they'll be read
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86 | # in the correct order
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87 | my $count = 1;
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88 | foreach my $thisfile (@files) {
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89 | if ($thisfile =~ /^(.*?)\.html?$/i) {
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90 | my $filesuf = $1;
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91 | $thisfile = &util::filename_cat($dir, $thisfile);
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92 | my ($language, $encoding) = $self->textcat_get_language_encoding ($thisfile);
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93 | # read in file ($text will be in utf8)
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94 | my $text = "";
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95 | $self->read_file ($thisfile, $encoding, $language, \$text);
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96 | if (!length ($text)) {
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97 | die "$thisfile has no text\n";
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98 | }
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99 |
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100 | my $cursection = $doc_obj->insert_section($doc_obj->get_end_child($topsection));
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101 |
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102 | # process HTML file with HTMLPlug
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103 | $self->process_section (\$text, '', $thisfile, $doc_obj, $cursection);
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104 |
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105 | # associate PDF file with doc object
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106 | my $pdffile = $thisfile;
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107 | $pdffile =~ s/\.html?$/\.pdf/;
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108 | die "no PDF file for $thisfile" unless -e $pdffile;
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109 | $doc_obj->associate_file($pdffile, "doc$count.pdf", undef, $cursection);
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110 | my $doclink = "<a href=\"_httpcollection_/index/assoc/[parent(Top):archivedir]/doc$count.pdf\">";
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111 | # $doc_obj->add_utf8_metadata ($cursection, "srclink", $doclink);
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112 | $doc_obj->add_utf8_metadata ($cursection, "Title", $count);
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113 |
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114 | # add any section level metadata we have for this page (set from within the meta.xml file)
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115 | # if (defined ($self->{'section_metadata'}->{$filesuf})) {
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116 | # foreach my $key (keys %{$self->{'section_metadata'}->{$filesuf}}) {
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117 | # $doc_obj->add_utf8_metadata ($cursection, $key, $self->{'section_metadata'}->{$filesuf}->{$key});
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118 | # }
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119 | # }
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120 |
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121 | $count ++;
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122 | }
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123 | }
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124 |
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125 | # add an OID
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126 | $doc_obj->set_OID();
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127 |
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128 | # process the document
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129 | $processor->process($doc_obj);
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130 |
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131 | $self->{'num_processed'} ++;
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132 |
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133 | return 1; # processed the file
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134 | }
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135 |
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136 |
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137 | sub StartTag {
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138 | my ($expat, $element) = @_;
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139 |
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140 | if ($element eq "Page") {
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141 | $self->{'Page'} = $_{'filename'};
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142 |
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143 | } elsif ($element eq "Metadata") {
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144 | if (!defined $self->{'section_metadata'}->{$self->{'Page'}}) {
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145 | $self->{'section_metadata'}->{$self->{'Page'}} = {};
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146 | }
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147 | $self->{'metadata_name'} = $_{'name'};
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148 | $self->{'section_metadata'}->{$self->{'Page'}}->{$_{'name'}} = "";
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149 | }
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150 | }
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151 |
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152 | sub EndTag {
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153 | my ($expat, $element) = @_;
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154 |
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155 | if ($element eq "Page") {
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156 | $self->{'Page'} eq "TopLevel";
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157 |
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158 | } elsif ($element eq "Metadata") {
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159 | $self->{'metadata_name'} = "";
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160 | }
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161 | }
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162 |
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163 | sub Text {
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164 | if ($self->{'metadata_name'} ne "") {
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165 | $self->{'section_metadata'}->{$self->{'Page'}}->{$self->{'metadata_name'}} .= $_;
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166 | }
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167 | }
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168 |
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169 | 1;
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