[36480] | 1 | ###########################################################################
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| 2 | #
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| 3 | # CSVPlugin.pm -- A plugin for files 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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[36481] | 27 | package CSVPlugin;
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[36480] | 28 |
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| 29 | use extrametautil;
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| 30 |
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| 31 | use ReadTextFile;
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| 32 | use SplitTextFile; # for a couple routines, but we not inheriting
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| 33 | use MetadataRead;
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| 34 | use CSVFieldSeparator;
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| 35 |
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| 36 | use strict;
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| 37 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 38 |
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| 39 | use Text::CSV;
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| 40 |
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| 41 | sub BEGIN {
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[36481] | 42 | @CSVPlugin::ISA = ('MetadataRead', 'ReadTextFile', 'CSVFieldSeparator');
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[36480] | 43 | binmode(STDERR, ":utf8");
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| 44 |
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| 45 | }
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| 46 |
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| 47 |
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| 48 | my $arguments =
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| 49 | [
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| 50 | { 'name' => "process_exp",
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| 51 | 'desc' => "{BaseImporter.process_exp}",
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| 52 | 'type' => "regexp",
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| 53 | 'reqd' => "no",
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| 54 | 'deft' => &get_default_process_exp() },
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| 55 | { 'name' => "filename_field",
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| 56 | 'desc' => "{CSVPlugin.filename_field}",
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| 57 | 'type' => "string",
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| 58 | 'reqd' => "no",
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[36482] | 59 | 'deft' => "Filename" },
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| 60 | { 'name' => "no_document_if_source_unspecified",
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| 61 | 'desc' => "{CSVPlugin.no_document_if_source_unspecified}",
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| 62 | 'type' => "flag",
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| 63 | 'reqd' => "no"},
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| 64 | { 'name' => "no_document_if_source_missing",
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| 65 | 'desc' => "{CSVPlugin.no_document_if_source_missing}",
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| 66 | 'type' => "flag",
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| 67 | 'reqd' => "no"},
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[36533] | 68 | { 'name' => "use_namespace_for_field_names",
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| 69 | 'desc' => "{CSVPlugin.use_namespace_for_field_names}",
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| 70 | 'type' => "string",
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| 71 | 'reqd' => "no"},
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[36482] | 72 | { 'name' => "store_field_values_as_document_text",
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| 73 | 'desc' => "{CSVPlugin.store_field_values_as_document_text}",
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| 74 | 'type' => "flag",
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| 75 | 'reqd' => "no"},
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[36480] | 76 |
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| 77 |
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[36482] | 78 | ];
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| 79 |
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| 80 |
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[36481] | 81 | my $options = { 'name' => "CSVPlugin",
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[36480] | 82 | 'desc' => "{CSVPlugin.desc}",
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| 83 | 'abstract' => "no",
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| 84 | 'inherits' => "yes",
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| 85 | 'explodes' => "yes",
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| 86 | 'args' => $arguments };
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| 87 |
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| 88 |
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| 89 | # This plugin processes files with the suffix ".csv"
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| 90 | sub get_default_process_exp {
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| 91 | return q^(?i)(\.csv)$^;
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| 92 | }
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| 93 |
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| 94 | sub new
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| 95 | {
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| 96 | my ($class) = shift (@_);
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| 97 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 98 | push(@$pluginlist, $class);
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| 99 |
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| 100 | push(@{$hashArgOptLists->{"ArgList"}}, @{$arguments});
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| 101 | push(@{$hashArgOptLists->{"OptList"}}, $options);
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| 102 |
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| 103 | new CSVFieldSeparator($pluginlist, $inputargs, $hashArgOptLists);
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| 104 | my $self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists);
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| 105 |
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| 106 | $self->{'textcat_store'} = {};
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| 107 | $self->{'metapass_srcdoc'} = {}; # which segments have valid metadata_srcdoc
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[36533] | 108 |
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| 109 | if ($self->{'use_namespace_for_field_names'} =~ /^\s*$/) {
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| 110 | $self->{'use_namespace_for_field_names'} = undef;
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| 111 | }
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| 112 |
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[36480] | 113 | return bless $self, $class;
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| 114 | }
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| 115 |
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[36533] | 116 |
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[36480] | 117 | # mark the file as a metadata file
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| 118 | sub file_block_read {
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| 119 | my $self = shift (@_);
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| 120 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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| 121 |
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| 122 | my $filename_full_path = &FileUtils::filenameConcatenate($base_dir, $file);
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| 123 | return undef unless $self->can_process_this_file($filename_full_path);
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| 124 |
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| 125 | if (($ENV{'GSDLOS'} =~ m/^windows$/) && ($^O ne "cygwin")) {
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| 126 | # convert to full name - paths stored in block hash are long filenames
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| 127 | $filename_full_path = &util::upgrade_if_dos_filename($filename_full_path);
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| 128 | }
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| 129 | # kjdon - upgrade method converts everyhting to lower case drive letter.
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| 130 | # so would we need the following stuff???
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| 131 | # my $lower_drive = $filename_full_path;
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| 132 | # $lower_drive =~ s/^([A-Z]):/\l$1:/i;
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| 133 |
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| 134 | # my $upper_drive = $filename_full_path;
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| 135 | # $upper_drive =~ s/^([A-Z]):/\u$1:/i;
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| 136 |
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| 137 | # $block_hash->{'metadata_files'}->{$lower_drive} = 1;
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| 138 | # $block_hash->{'metadata_files'}->{$upper_drive} = 1;
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| 139 |
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| 140 | # }
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| 141 | # else {
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| 142 | ### $block_hash->{'metadata_files'}->{$filename_full_path} = 1;
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| 143 | # }
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| 144 | $block_hash->{'metadata_files'}->{$filename_full_path} = 1;
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| 145 | return undef; #1
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| 146 | }
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| 147 |
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| 148 | sub metadata_read
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| 149 | {
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| 150 | my $self = shift (@_);
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| 151 | my ($pluginfo, $base_dir, $file, $block_hash,
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| 152 | $extrametakeys, $extrametadata, $extrametafile,
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| 153 | $processor, $gli, $aux) = @_;
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| 154 |
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| 155 | # can we process this file??
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| 156 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 157 | return undef unless $self->can_process_this_file_for_metadata($filename_full_path);
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| 158 |
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[36481] | 159 | print STDERR "\n<Processing n='$file' p='CSVPlugin'>\n" if ($gli);
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| 160 | print STDERR "CSVPlugin: processing $file\n" if ($self->{'verbosity'}) > 1;
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[36480] | 161 |
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| 162 | my $outhandle = $self->{'outhandle'};
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| 163 | my $failhandle = $self->{'failhandle'};
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| 164 | my $verbosity = $self->{'verbosity'};
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| 165 |
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| 166 | # don't add to block list, as we may do some processing in read.
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| 167 |
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| 168 | # Do encoding stuff
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| 169 | my ($language, $content_encoding) = $self->textcat_get_language_encoding ($filename_full_path);
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| 170 | if ($self->{'verbosity'} > 2) {
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[36481] | 171 | print $outhandle "CSVPlugin: reading $file as ($content_encoding,$language)\n";
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[36480] | 172 | }
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| 173 | # store these values for read
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| 174 | my $le_rec = { 'language' => $language, 'encoding' => $content_encoding };
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| 175 | $self->{'textcat_store'}->{$file} = $le_rec;
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| 176 |
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| 177 | my $metadata_store = {};
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| 178 | $self->{'metadata_store'}->{$file} = $metadata_store; # used to record metadata for segments with no src doc
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| 179 |
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| 180 | my $CSV_FILE;
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| 181 | open($CSV_FILE, "<:encoding($content_encoding)", "$filename_full_path");
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| 182 | my $separate_char = $self->{'csv_field_separator'};
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| 183 |
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| 184 | my $md_val_sep = $self->{'metadata_value_separator'};
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| 185 | undef $md_val_sep if ($md_val_sep eq "");
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| 186 |
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| 187 | my $csv_file_field_line;
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| 188 | if ($separate_char =~ m/^auto$/i) {
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| 189 |
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| 190 | $csv_file_field_line = <$CSV_FILE>;
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| 191 | $separate_char = $self->resolve_auto($csv_file_field_line,$self->{'plugin_type'});
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| 192 | seek $CSV_FILE, 0, 0; # move pointer back to start of file, as we want to read in the fields using csv.
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| 193 | }
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| 194 |
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| 195 | my $csv = Text::CSV->new();
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| 196 | $csv->sep_char($separate_char);
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| 197 | $csv->binary(1);
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| 198 |
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| 199 | my @csv_file_fields = undef;
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| 200 |
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| 201 | my $first_row = $csv->getline ($CSV_FILE);
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| 202 | if (defined $first_row) {
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| 203 | @csv_file_fields = @$first_row;
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| 204 | }
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| 205 | else {
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| 206 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "Error: Badly formatted CSV header line: $csv_file_field_line");
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| 207 | return -1;
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| 208 | }
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| 209 |
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| 210 | my $found_filename_field = 0;
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| 211 | my $filename_field = $self->{'filename_field'};
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| 212 | for (my $i = 0; $i < scalar(@csv_file_fields); $i++) {
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| 213 | # Remove any spaces from the field names, and surrounding quotes too
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| 214 | $csv_file_fields[$i] =~ s/ //g;
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| 215 | $csv_file_fields[$i] =~ s/^"//;
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| 216 | $csv_file_fields[$i] =~ s/"$//;
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| 217 |
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[36533] | 218 | if ($self->{'use_namespace_for_field_names'}) {
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| 219 | $csv_file_fields[$i] = $self->{'use_namespace_for_field_names'}. "." . $csv_file_fields[$i];
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| 220 | }
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[36480] | 221 | if ($csv_file_fields[$i] eq $filename_field) {
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| 222 | $found_filename_field = 1;
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[36533] | 223 | }
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[36480] | 224 | }
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| 225 |
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| 226 |
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| 227 | if (!$found_filename_field) {
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[36482] | 228 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "No $filename_field field in CSV file, metadata cannot be assigned to documents, will use metadata only dummy documents");
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[36480] | 229 |
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| 230 | }
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| 231 |
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| 232 | my $count = 0;
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| 233 | while (my $csv_line = $csv->getline($CSV_FILE)) {
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| 234 | my @md_vals = @$csv_line;
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| 235 | $count++;
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| 236 |
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| 237 | # Build a hash of metadata name to metadata value for this line
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| 238 | my %csv_line_metadata;
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| 239 |
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| 240 | my $md_vals_len = scalar(@md_vals);
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| 241 |
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| 242 | for (my $i=0; $i<$md_vals_len; $i++) {
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| 243 | my $md_val = $md_vals[$i];
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| 244 | # Only bother with non-empty values
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| 245 | if ($md_val ne "" && defined($csv_file_fields[$i])) {
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| 246 |
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| 247 | my $md_name = $csv_file_fields[$i];
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| 248 | $csv_line_metadata{$md_name} = [];
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| 249 | if (defined $md_val_sep) {
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| 250 |
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| 251 | my @within_md_vals = split(/${md_val_sep}/,$md_val);
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| 252 |
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| 253 | # protect square brackets in metadata values by hex entity encoding them
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| 254 | # As unescaped square bracket chars in metadata
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| 255 | # have special meaning in GS' Java runtime code
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| 256 | my @escaped_within_md_vals = ();
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| 257 | for my $meta_value (@within_md_vals) {
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| 258 |
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| 259 | $meta_value =~ s/\[/&\#091;/g;
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| 260 | $meta_value =~ s/\]/&\#093;/g;
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| 261 | push(@escaped_within_md_vals, $meta_value);
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| 262 | }
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| 263 | push (@{$csv_line_metadata{$md_name}}, @escaped_within_md_vals);
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| 264 | }
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| 265 | else {
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| 266 | # protect square brackets in metadata values by hex entity encoding them
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| 267 | my $escaped_metadata_value = $md_val;
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| 268 | $escaped_metadata_value =~ s/\[/&\#091;/g;
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| 269 | $escaped_metadata_value =~ s/\]/&\#093;/g;
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| 270 | push (@{$csv_line_metadata{$md_name}}, $escaped_metadata_value);
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| 271 | }
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | my $csv_line_section_array = $csv_line_metadata{"Section"};
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| 276 | my $section_suffix = "";
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| 277 | if (defined $csv_line_section_array) {
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| 278 | my $section_value = shift(@$csv_line_section_array);
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| 279 | if ($section_value =~ /[\d.]+/m){
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| 280 | my $section_suffix = "///Section/" . $section_value;
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| 281 | foreach my $metaname (keys %csv_line_metadata) {
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| 282 | my $new_name = $metaname . $section_suffix;
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| 283 | $csv_line_metadata{$new_name} = delete $csv_line_metadata{$metaname};
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| 284 | }
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| 285 | } else{
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| 286 | unshift(@$csv_line_section_array, $section_value);
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| 287 | }
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| 288 | }
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| 289 |
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| 290 | # do we have filename field?
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| 291 | # We can't associate any metadata without knowing the file to associate it with
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| 292 | my $has_srcdoc = 0;
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[36482] | 293 | my $missing_srcdoc = 0;
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[36480] | 294 | my $csv_line_filename="";;
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| 295 | if ($found_filename_field) {
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| 296 | # is there a srcdoc mentioned?
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| 297 | my $csv_line_filename_array = $csv_line_metadata{$filename_field};
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| 298 | if (!defined $csv_line_filename_array) {
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[36482] | 299 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "No $filename_field metadata in CSV line num $count");
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[36480] | 300 | } else {
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| 301 | $csv_line_filename = shift(@$csv_line_filename_array);
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| 302 | # TODO - have an option for whether we do this or not
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| 303 | if (&FileUtils::fileExists(&FileUtils::filenameConcatenate($base_dir, $csv_line_filename))) {
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| 304 | $has_srcdoc = 1;
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| 305 |
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| 306 | delete $csv_line_metadata{$filename_field};
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[36482] | 307 | } else {
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| 308 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "$csv_line_filename in $filename_field metadata in CSV line num $count is not found");
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| 309 | $missing_srcdoc = 1; # there was one mentioned but its not found
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[36480] | 310 | }
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| 311 | }
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| 312 |
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| 313 | }
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| 314 | if ($has_srcdoc) {
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[36482] | 315 | print $outhandle "Storing metadata, segment $count, for document $csv_line_filename\n" if ($verbosity > 2);
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[36480] | 316 | $self->store_meta_in_extrametadata($csv_line_filename, \%csv_line_metadata, $file, $filename_full_path, $extrametakeys, $extrametadata, $extrametafile);
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| 317 | } else {
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[36482] | 318 | my $store_for_dummy = 1;
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| 319 | if ($missing_srcdoc && $self->{'no_document_if_source_missing'}) {
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| 320 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path,"Not storing metadata for line $count as source doc is missing");
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| 321 | $store_for_dummy = 0;
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| 322 | } elsif(!$missing_srcdoc && $self->{'no_document_if_source_unspecified'}) {
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| 323 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path,"Not storing metadata for line $count as source doc is unspecified");
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| 324 | $store_for_dummy = 0;
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| 325 | }
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| 326 | if ($store_for_dummy) {
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| 327 |
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| 328 | print $outhandle "Storing metadata for dummy document, segment $count\n" if ($verbosity > 2);
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| 329 | $metadata_store->{$count} = \%csv_line_metadata;
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| 330 | }
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[36480] | 331 | }
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| 332 | } # while csv_line = csv->getline
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| 333 | close ($CSV_FILE);
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| 334 | }
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| 335 |
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| 336 | #adapted from read in splittextfile
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| 337 | sub read {
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| 338 | my $self = shift (@_);
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| 339 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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| 340 | my $outhandle = $self->{'outhandle'};
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| 341 | my $verbosity = $self->{'verbosity'};
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| 342 |
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| 343 | # can we process this file??
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| 344 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 345 | return undef unless $self->can_process_this_file($filename_full_path);
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| 346 |
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| 347 | $file =~ s/^[\/\\]+//; # $file often begins with / so we'll tidy it up
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| 348 |
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| 349 | my $le_rec = $self->{'textcat_store'}->{$file};
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| 350 | if (!defined $le_rec) {
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| 351 | # means no text was found;
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| 352 | return 0; # not processed but no point in passing it on
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| 353 | }
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| 354 |
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| 355 | print STDERR "<Processing n='$file' p='$self->{'plugin_type'}'>\n" if ($gli);
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| 356 | print $outhandle "$self->{'plugin_type'} processing $file\n"
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| 357 | if $self->{'verbosity'} > 1;
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| 358 |
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| 359 | my $language = $le_rec->{'language'};
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| 360 | my $encoding = $le_rec->{'encoding'};
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| 361 | $self->{'textcat_store'}->{$file} = undef;
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| 362 |
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| 363 | my $metadata_store = $self->{'metadata_store'}->{$file}; # a hash of seg num to metadata hash
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| 364 |
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| 365 |
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| 366 | # Process each segment in turn
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| 367 | my $segment = 0; #which segment/record number we have
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| 368 | my $count = 0; # num doc objs produced
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| 369 |
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| 370 | my ($filemeta) = $file =~ /([^\\\/]+)$/; #why?
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| 371 | my $plugin_filename_encoding = $self->{'filename_encoding'};
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| 372 | my $filename_encoding = $self->deduce_filename_encoding($file,$metadata,$plugin_filename_encoding);
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| 373 |
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| 374 | my $id;
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[36482] | 375 |
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| 376 | foreach $segment (sort { $a <=> $b } keys (%$metadata_store)) {
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| 377 | print $outhandle "processing segment $segment as its own document\n"
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[36480] | 378 | if $self->{'verbosity'} > 1;
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| 379 | $count++;
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| 380 | # create a new document
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| 381 | my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
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[36482] | 382 | my $cursection = $doc_obj->get_top_section();
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| 383 | $doc_obj->add_utf8_metadata($cursection, "Language", $language);
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| 384 | $doc_obj->add_utf8_metadata($cursection, "Encoding", $encoding);
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[36480] | 385 |
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| 386 | $self->set_Source_metadata($doc_obj, $filename_full_path, $filename_encoding);
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| 387 |
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[36482] | 388 | $doc_obj->add_utf8_metadata($cursection, "SourceSegment", "$segment");
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[36480] | 389 | if ($self->{'cover_image'}) {
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| 390 | $self->associate_cover_image($doc_obj, $filename_full_path);
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| 391 | }
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[36482] | 392 | $doc_obj->add_utf8_metadata($cursection, "Plugin", "$self->{'plugin_type'}");
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[36480] | 393 |
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| 394 | # include any metadata passed in from previous plugins
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| 395 | # note that this metadata is associated with the top level section
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[36482] | 396 | $self->extra_metadata ($doc_obj, $cursection, $metadata);
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[36480] | 397 |
|
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| 398 | # add our stored metadata from metadata_read pass
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| 399 | my $segment_metadata = $metadata_store->{$segment};
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[36482] | 400 | $self->extra_metadata($doc_obj, $cursection, $segment_metadata);
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| 401 | if ($self->{'store_field_values_as_document_text'}) {
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| 402 | my $new_text = "";
|
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| 403 | foreach my $f (keys %$segment_metadata) {
|
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| 404 | my $values = $segment_metadata->{$f};
|
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| 405 | $new_text .= join (", ", @$values).", ";
|
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| 406 | }
|
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[36480] | 407 |
|
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[36482] | 408 | $doc_obj->add_utf8_text($cursection, $new_text);
|
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| 409 | }
|
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[36480] | 410 | # do any automatic metadata extraction - does this make sense??
|
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| 411 | #$self->auto_extract_metadata ($doc_obj);
|
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| 412 |
|
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| 413 | # Calculate a "base" document ID.
|
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| 414 | if (!defined $id) {
|
---|
| 415 | $id = &SplitTextFile::get_base_OID($self,$doc_obj);
|
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| 416 | }
|
---|
| 417 |
|
---|
| 418 | # add an OID
|
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| 419 | &SplitTextFile::add_segment_OID($self, $doc_obj, $id, $segment);
|
---|
| 420 |
|
---|
| 421 | # process the document
|
---|
| 422 | $processor->process($doc_obj);
|
---|
| 423 |
|
---|
| 424 | $self->{'num_processed'} ++;
|
---|
| 425 | if ($maxdocs != -1 && $self->{'num_processed'} >= $maxdocs) {
|
---|
| 426 | last;
|
---|
| 427 | }
|
---|
| 428 | }
|
---|
| 429 |
|
---|
| 430 | delete $self->{'metadata_store'}->{$file};
|
---|
| 431 |
|
---|
| 432 | # Return number of document objects produced
|
---|
| 433 | return $count;
|
---|
| 434 | }
|
---|
| 435 |
|
---|
[36482] | 436 | sub print_warning {
|
---|
| 437 | my $self = shift(@_);
|
---|
| 438 | my ($outhandle, $failhandle, $gli, $file, $error) = @_;
|
---|
| 439 |
|
---|
| 440 | print $outhandle "CSVPlugin Warning: $file: $error\n";
|
---|
| 441 | print $failhandle "CSVPlugin Warning: $file: $error\n";
|
---|
| 442 | print STDERR "<ProcessingError n='$file' r='$error'/>\n" if ($gli);
|
---|
| 443 |
|
---|
| 444 | }
|
---|
[36480] | 445 | sub print_error
|
---|
| 446 | {
|
---|
| 447 |
|
---|
| 448 | my $self = shift(@_);
|
---|
| 449 | my ($outhandle, $failhandle, $gli, $file, $error) = @_;
|
---|
| 450 |
|
---|
[36481] | 451 | print $outhandle "CSVPlugin Error: $file: $error\n";
|
---|
| 452 | print $failhandle "CSVPlugin Error: $file: $error\n";
|
---|
[36480] | 453 | print STDERR "<ProcessingError n='$file' r='$error'/>\n" if ($gli);
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 |
|
---|
| 457 | 1;
|
---|