| 1 | ###########################################################################
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| 2 | #
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| 3 | # MetadataCSVPlugin.pm -- A plugin for metadata in comma-separated value format
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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 2006 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 MetadataCSVPlugin;
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| 28 |
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| 29 |
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| 30 | use BaseImporter;
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| 31 | use MetadataRead;
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| 32 | use CSVFieldSeparator;
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| 33 |
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| 34 | use strict;
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| 35 | no strict 'refs';
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| 36 |
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| 37 | use multiread;
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| 38 | use util;
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| 39 |
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| 40 | use Encode;
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| 41 | use Text::CSV;
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| 42 |
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| 43 | # methods with identical signatures take precedence in the order given in the ISA list.
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| 44 | sub BEGIN {
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| 45 | @MetadataCSVPlugin::ISA = ('MetadataRead', 'BaseImporter', 'CSVFieldSeparator');
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| 46 | }
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| 47 |
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| 48 |
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| 49 |
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| 50 | my $arguments = [
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| 51 | { 'name' => "process_exp",
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| 52 | 'desc' => "{BaseImporter.process_exp}",
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| 53 | 'type' => "regexp",
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| 54 | 'reqd' => "no",
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| 55 | 'deft' => &get_default_process_exp() }
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| 56 |
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| 57 | ];
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| 58 |
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| 59 |
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| 60 | my $options = { 'name' => "MetadataCSVPlugin",
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| 61 | 'desc' => "{MetadataCSVPlugin.desc}",
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| 62 | 'abstract' => "no",
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| 63 | 'inherits' => "yes",
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| 64 | 'args' => $arguments };
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| 65 |
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| 66 |
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| 67 | sub new
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| 68 | {
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| 69 | my ($class) = shift (@_);
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| 70 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 71 | push(@$pluginlist, $class);
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| 72 |
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| 73 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 74 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 75 |
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| 76 | new CSVFieldSeparator($pluginlist, $inputargs, $hashArgOptLists);
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| 77 | my $self = new BaseImporter($pluginlist, $inputargs, $hashArgOptLists);
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| 78 |
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| 79 | return bless $self, $class;
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| 80 | }
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| 81 |
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| 82 |
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| 83 | sub get_default_process_exp
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| 84 | {
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| 85 | return q^(?i)\.csv$^;
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| 86 | }
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| 87 |
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| 88 | sub file_block_read {
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| 89 | my $self = shift (@_);
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| 90 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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| 91 |
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| 92 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 93 |
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| 94 | if (!-f $filename_full_path || !$self->can_process_this_file($filename_full_path)) {
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| 95 | return undef; # can't recognise
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| 96 | }
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| 97 |
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| 98 | # set this so we know this is a metadata file - needed for incremental
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| 99 | # build
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| 100 | # if this file changes, then we need to reimport everything
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| 101 | $block_hash->{'metadata_files'}->{$filename_full_path} = 1;
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| 102 |
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| 103 | return 1;
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| 104 | }
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| 105 |
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| 106 | sub metadata_read
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| 107 | {
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| 108 | my $self = shift (@_);
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| 109 | my ($pluginfo, $base_dir, $file, $block_hash,
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| 110 | $extrametakeys, $extrametadata, $extrametafile,
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| 111 | $processor, $gli, $aux) = @_;
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| 112 |
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| 113 | # can we process this file??
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| 114 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 115 | return undef unless $self->can_process_this_file_for_metadata($filename_full_path);
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| 116 |
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| 117 | print STDERR "\n<Processing n='$file' p='MetadataCSVPlugin'>\n" if ($gli);
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| 118 | print STDERR "MetadataCSVPlugin: processing $file\n" if ($self->{'verbosity'}) > 1;
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| 119 |
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| 120 | my $outhandle = $self->{'outhandle'};
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| 121 | my $failhandle = $self->{'failhandle'};
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| 122 |
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| 123 | # add the file to the block list so that it won't be processed in read, as we will do all we can with it here
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| 124 | $self->block_raw_filename($block_hash,$filename_full_path);
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| 125 |
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| 126 |
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| 127 | # Read the CSV file to get the metadata
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| 128 | my $csv_file_content;
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| 129 | open(CSV_FILE, "$filename_full_path");
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| 130 | my $csv_file_reader = new multiread();
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| 131 | $csv_file_reader->set_handle('MetadataCSVPlugin::CSV_FILE');
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| 132 | $csv_file_reader->read_file(\$csv_file_content);
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| 133 |
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| 134 | # Would be nice if MetadataCSVPlugin was extended to support a minus
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| 135 | # option to choose the character encoding the CSV file is in
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| 136 | # For now we will assume it is always in UTF8
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| 137 | $csv_file_content = decode("utf8",$csv_file_content);
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| 138 |
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| 139 | close(CSV_FILE);
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| 140 |
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| 141 | # Split the file into lines and read the first line (contains the metadata names)
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| 142 | $csv_file_content =~ s/\r/\n/g; # Handle non-Unix line endings
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| 143 | $csv_file_content =~ s/\n+/\n/g;
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| 144 |
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| 145 | my $separate_char = $self->{'csv_field_separator'};
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| 146 |
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| 147 | my $md_val_sep = $self->{'metadata_value_separator'};
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| 148 | undef $md_val_sep if ($md_val_sep eq "");
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| 149 |
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| 150 | my @csv_file_lines = split(/\n/, $csv_file_content);
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| 151 | my $csv_file_field_line = shift(@csv_file_lines);
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| 152 |
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| 153 | if ($separate_char =~ m/^auto$/i) {
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| 154 | $separate_char = $self->resolve_auto($csv_file_field_line,$self->{'plugin_type'});
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| 155 | }
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| 156 |
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| 157 | my $csv = Text::CSV->new();
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| 158 | $csv->sep_char($separate_char);
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| 159 |
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| 160 | my @csv_file_fields = undef;
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| 161 | if ($csv->parse($csv_file_field_line)) {
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| 162 | @csv_file_fields = $csv->fields;
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| 163 | }
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| 164 | else {
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| 165 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "Error: Badly formatted CSV header line: $csv_file_field_line");
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| 166 | return -1;
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| 167 | }
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| 168 |
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| 169 | my $found_filename_field = 0;
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| 170 | for (my $i = 0; $i < scalar(@csv_file_fields); $i++) {
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| 171 | # Remove any spaces from the field names, and surrounding quotes too
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| 172 | $csv_file_fields[$i] =~ s/ //g;
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| 173 | $csv_file_fields[$i] =~ s/^"//;
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| 174 | $csv_file_fields[$i] =~ s/"$//;
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| 175 |
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| 176 | if ($csv_file_fields[$i] eq "Filename") {
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| 177 | $found_filename_field = 1;
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| 178 | }
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| 179 | }
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| 180 |
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| 181 | if (!$found_filename_field) {
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| 182 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "No Filename field in CSV file");
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| 183 | return -1; # error
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| 184 | }
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| 185 | # Read each line of the file and assign the metadata appropriately
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| 186 | foreach my $csv_line (@csv_file_lines) {
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| 187 | # Ignore lines containing only whitespace
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| 188 | next if ($csv_line =~ /^\s*$/);
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| 189 | my $orig_csv_line = $csv_line;
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| 190 |
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| 191 | # Build a hash of metadata name to metadata value for this line
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| 192 | my %csv_line_metadata;
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| 193 |
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| 194 | if ($csv->parse($csv_line)) {
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| 195 | my @md_vals = $csv->fields;
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| 196 | my $md_vals_len = scalar(@md_vals);
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| 197 |
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| 198 | for (my $i=0; $i<$md_vals_len; $i++) {
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| 199 | my $md_val = $md_vals[$i];
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| 200 | # Only bother with non-empty values
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| 201 | if ($md_val ne "" && defined($csv_file_fields[$i])) {
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| 202 |
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| 203 | my $md_name = $csv_file_fields[$i];
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| 204 |
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| 205 | if (!defined $md_name) {
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| 206 | $csv_line_metadata{$md_name} = [];
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| 207 | }
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| 208 |
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| 209 | if (defined $md_val_sep) {
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| 210 |
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| 211 | my @within_md_vals = split(/${md_val_sep}/,$md_val);
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| 212 | #push (@{$csv_line_metadata{$md_name}}, @within_md_vals);
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| 213 |
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| 214 | # protect square brackets in metadata values by hex entity encoding them
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| 215 | # As unescaped square bracket chars in metadata
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| 216 | # have special meaning in GS' Java runtime code
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| 217 | my @escaped_within_md_vals = ();
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| 218 | for my $meta_value (@within_md_vals) {
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| 219 | $meta_value =~ s/\[/&\#091;/g;
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| 220 | $meta_value =~ s/\]/&\#093;/g;
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| 221 | push(@escaped_within_md_vals, $meta_value);
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| 222 | }
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| 223 | push (@{$csv_line_metadata{$md_name}}, @escaped_within_md_vals);
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| 224 |
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| 225 | # foreach my $within_md_val (@within_md_vals) {
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| 226 | # push (@{$csv_line_metadata{$md_name}}, $within_md_val);
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| 227 | # }
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| 228 | }
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| 229 | else {
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| 230 | #push (@{$csv_line_metadata{$md_name}}, $md_val);
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| 231 | # protect square brackets in metadata values by hex entity encoding them
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| 232 | my $escaped_metadata_value = $md_val;
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| 233 | $escaped_metadata_value =~ s/\[/&\#091;/g;
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| 234 | $escaped_metadata_value =~ s/\]/&\#093;/g;
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| 235 | push (@{$csv_line_metadata{$md_name}}, $escaped_metadata_value);
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| 236 | }
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| 237 | }
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| 238 | }
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| 239 | }
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| 240 | else {
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| 241 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "Badly formatted CSV line: $csv_line");
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| 242 | last;
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| 243 | }
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| 244 |
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| 245 | # We can't associate any metadata without knowing the file to associate it with
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| 246 | my $csv_line_filename_array = $csv_line_metadata{"Filename"};
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| 247 | if (!defined $csv_line_filename_array) {
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| 248 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "No Filename metadata in CSV line: $orig_csv_line");
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| 249 | next;
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| 250 | }
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| 251 | my $csv_line_filename = shift(@$csv_line_filename_array);
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| 252 | delete $csv_line_metadata{"Filename"};
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| 253 |
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| 254 | my $csv_line_section_array = $csv_line_metadata{"Section"};
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| 255 | my $section_suffix = "";
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| 256 | if (defined $csv_line_section_array) {
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| 257 | my $section_value = shift(@$csv_line_section_array);
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| 258 | if ($section_value =~ /[\d.]+/m){
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| 259 | my $section_suffix = "///Section/" . $section_value;
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| 260 | foreach my $metaname (keys %csv_line_metadata) {
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| 261 | my $new_name = $metaname . $section_suffix;
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| 262 | $csv_line_metadata{$new_name} = delete $csv_line_metadata{$metaname};
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| 263 | }
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| 264 | } else{
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| 265 | unshift(@$csv_line_section_array, $section_value);
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| 266 | }
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| 267 | }
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| 268 |
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| 269 |
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| 270 | # Associate the metadata now
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| 271 | $self->store_meta_in_extrametadata($csv_line_filename, \%csv_line_metadata, $file, $filename_full_path, $extrametakeys, $extrametadata, $extrametafile);
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| 272 |
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| 273 | }
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| 274 | }
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| 275 |
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| 276 | sub print_error
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| 277 | {
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| 278 |
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| 279 | my $self = shift(@_);
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| 280 | my ($outhandle, $failhandle, $gli, $file, $error) = @_;
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| 281 |
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| 282 | print $outhandle "MetadataCSVPlugin Error: $file: $error\n";
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| 283 | print $failhandle "MetadataCSVPlugin Error: $file: $error\n";
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| 284 | print STDERR "<ProcessingError n='$file' r='$error'/>\n" if ($gli);
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| 285 | }
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| 286 | 1;
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