| 1 | ###########################################################################
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| 2 | #
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| 3 | # BasPlug.pm -- base class for all the import plugins
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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) 1999-2005 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 | package BasPlug;
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| 27 |
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| 28 | BEGIN {
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| 29 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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| 30 | }
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| 31 |
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| 32 | eval {require bytes};
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| 33 |
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| 34 | # suppress the annoying "subroutine redefined" warning that various
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| 35 | # plugins cause under perl 5.6
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| 36 | $SIG{__WARN__} = sub {warn($_[0]) unless ($_[0] =~ /Subroutine\s+\S+\sredefined/)};
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| 37 |
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| 38 | use strict; no strict 'subs';
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| 39 |
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| 40 | use File::Basename;
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| 41 |
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| 42 | use Kea;
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| 43 | use parsargv;
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| 44 | use multiread;
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| 45 | use encodings;
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| 46 | use cnseg;
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| 47 | use acronym;
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| 48 | use textcat;
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| 49 | use doc;
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| 50 | eval "require diagnostics"; # some perl distros (eg mac) don't have this
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| 51 | use DateExtract;
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| 52 | use ghtml;
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| 53 | use gsprintf 'gsprintf';
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| 54 | use printusage;
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| 55 |
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| 56 | use GISBasPlug;
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| 57 |
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| 58 | @BasPlug::ISA = ( GISBasPlug );
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| 59 |
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| 60 | my $unicode_list =
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| 61 | [ { 'name' => "auto",
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| 62 | 'desc' => "{BasPlug.input_encoding.auto}" },
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| 63 | { 'name' => "ascii",
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| 64 | 'desc' => "{BasPlug.input_encoding.ascii}" },
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| 65 | { 'name' => "utf8",
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| 66 | 'desc' => "{BasPlug.input_encoding.utf8}" },
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| 67 | { 'name' => "unicode",
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| 68 | 'desc' => "{BasPlug.input_encoding.unicode}" } ];
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| 69 |
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| 70 | my $arguments =
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| 71 | [ { 'name' => "process_exp",
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| 72 | 'desc' => "{BasPlug.process_exp}",
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| 73 | 'type' => "regexp",
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| 74 | 'deft' => "",
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| 75 | 'reqd' => "no" },
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| 76 | { 'name' => "block_exp",
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| 77 | 'desc' => "{BasPlug.block_exp}",
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| 78 | 'type' => "regexp",
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| 79 | 'deft' => "",
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| 80 | 'reqd' => "no" },
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| 81 | { 'name' => "smart_block",
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| 82 | 'desc' => "{BasPlug.smart_block}",
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| 83 | 'type' => "flag",
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| 84 | 'reqd' => "no" },
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| 85 | { 'name' => "associate_ext",
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| 86 | 'desc' => "{BasPlug.associate_ext}",
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| 87 | 'type' => "string",
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| 88 | 'reqd' => "no" },
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| 89 | { 'name' => "input_encoding",
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| 90 | 'desc' => "{BasPlug.input_encoding}",
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| 91 | 'type' => "enum",
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| 92 | 'list' => $unicode_list,
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| 93 | 'reqd' => "no" ,
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| 94 | 'deft' => "auto" } ,
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| 95 | { 'name' => "default_encoding",
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| 96 | 'desc' => "{BasPlug.default_encoding}",
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| 97 | 'type' => "enum",
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| 98 | 'list' => $unicode_list,
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| 99 | 'reqd' => "no",
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| 100 | 'deft' => "utf8" },
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| 101 | { 'name' => "extract_language",
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| 102 | 'desc' => "{BasPlug.extract_language}",
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| 103 | 'type' => "flag",
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| 104 | 'reqd' => "no" },
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| 105 | { 'name' => "default_language",
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| 106 | 'desc' => "{BasPlug.default_language}",
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| 107 | 'type' => "language",
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| 108 | 'deft' => "en",
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| 109 | 'reqd' => "no" },
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| 110 | { 'name' => "extract_acronyms",
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| 111 | 'desc' => "{BasPlug.extract_acronyms}",
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| 112 | 'type' => "flag",
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| 113 | 'reqd' => "no" },
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| 114 | { 'name' => "markup_acronyms",
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| 115 | 'desc' => "{BasPlug.markup_acronyms}",
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| 116 | 'type' => "flag",
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| 117 | 'reqd' => "no" },
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| 118 | { 'name' => "extract_keyphrases",
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| 119 | 'desc' => "{BasPlug.extract_keyphrases}",
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| 120 | 'type' => "flag",
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| 121 | 'reqd' => "no" },
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| 122 | { 'name' => "extract_keyphrase_options",
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| 123 | 'desc' => "{BasPlug.extract_keyphrase_options}",
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| 124 | 'type' => "string",
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| 125 | 'deft' => "",
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| 126 | 'reqd' => "no" },
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| 127 | { 'name' => "first",
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| 128 | 'desc' => "{BasPlug.first}",
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| 129 | 'type' => "string",
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| 130 | 'reqd' => "no" },
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| 131 | { 'name' => "extract_email",
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| 132 | 'desc' => "{BasPlug.extract_email}",
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| 133 | 'type' => "flag",
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| 134 | 'reqd' => "no" },
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| 135 | { 'name' => "extract_historical_years",
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| 136 | 'desc' => "{BasPlug.extract_historical_years}",
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| 137 | 'type' => "flag",
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| 138 | 'reqd' => "no" },
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| 139 | { 'name' => "maximum_year",
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| 140 | 'desc' => "{BasPlug.maximum_year}",
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| 141 | 'type' => "int",
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| 142 | 'deft' => (localtime)[5]+1900,
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| 143 | 'reqd' => "no"},
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| 144 | { 'name' => "maximum_century",
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| 145 | 'desc' => "{BasPlug.maximum_century}",
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| 146 | 'type' => "string",
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| 147 | 'deft' => "",
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| 148 | 'reqd' => "no" },
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| 149 | { 'name' => "no_bibliography",
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| 150 | 'desc' => "{BasPlug.no_bibliography}",
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| 151 | 'type' => "flag",
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| 152 | 'reqd' => "no"},
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| 153 | { 'name' => "no_cover_image",
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| 154 | 'desc' => "{BasPlug.no_cover_image}",
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| 155 | 'type' => "flag",
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| 156 | 'reqd' => "no" } ];
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| 157 |
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| 158 | my $gis_arguments =
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| 159 | [ { 'name' => "extract_placenames",
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| 160 | 'desc' => "{GISBasPlug.extract_placenames}",
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| 161 | 'type' => "flag",
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| 162 | 'reqd' => "no" },
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| 163 | { 'name' => "gazetteer",
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| 164 | 'desc' => "{GISBasPlug.gazetteer}",
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| 165 | 'type' => "string",
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| 166 | 'reqd' => "no" },
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| 167 | { 'name' => "place_list",
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| 168 | 'desc' => "{GISBasPlug.place_list}",
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| 169 | 'type' => "flag",
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| 170 | 'reqd' => "no" } ];
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| 171 |
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| 172 |
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| 173 | my $options = { 'name' => "BasPlug",
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| 174 | 'desc' => "{BasPlug.desc}",
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| 175 | 'abstract' => "yes",
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| 176 | 'inherits' => "no",
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| 177 | 'args' => $arguments };
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| 178 |
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| 179 |
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| 180 |
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| 181 |
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| 182 | sub get_arguments
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| 183 | {
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| 184 | my $self = shift(@_);
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| 185 | my $optionlistref = $self->{'option_list'};
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| 186 | my @optionlist = @$optionlistref;
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| 187 | my $pluginoptions = pop(@$optionlistref);
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| 188 | my $pluginarguments = $pluginoptions->{'args'};
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| 189 | return $pluginarguments;
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| 190 | }
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| 191 |
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| 192 |
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| 193 | sub print_xml_usage
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| 194 | {
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| 195 | my $self = shift(@_);
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| 196 |
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| 197 | # XML output is always in UTF-8
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| 198 | gsprintf::output_strings_in_UTF8;
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| 199 |
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| 200 | PrintUsage::print_xml_header();
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| 201 | $self->print_xml();
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| 202 | }
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| 203 |
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| 204 |
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| 205 | sub print_xml
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| 206 | {
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| 207 | my $self = shift(@_);
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| 208 |
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| 209 | my $optionlistref = $self->{'option_list'};
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| 210 | my @optionlist = @$optionlistref;
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| 211 | my $pluginoptions = pop(@$optionlistref);
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| 212 | return if (!defined($pluginoptions));
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| 213 |
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| 214 | gsprintf(STDERR, "<PlugInfo>\n");
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| 215 | gsprintf(STDERR, " <Name>$pluginoptions->{'name'}</Name>\n");
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| 216 | my $desc = gsprintf::lookup_string($pluginoptions->{'desc'});
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| 217 | $desc =~ s/</&lt;/g; # doubly escaped
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| 218 | $desc =~ s/>/&gt;/g;
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| 219 |
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| 220 | gsprintf(STDERR, " <Desc>$desc</Desc>\n");
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| 221 | gsprintf(STDERR, " <Abstract>$pluginoptions->{'abstract'}</Abstract>\n");
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| 222 | gsprintf(STDERR, " <Inherits>$pluginoptions->{'inherits'}</Inherits>\n");
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| 223 | gsprintf(STDERR, " <Explodes>" . ($pluginoptions->{'explodes'} || "no") . "</Explodes>\n");
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| 224 | gsprintf(STDERR, " <Arguments>\n");
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| 225 | if (defined($pluginoptions->{'args'})) {
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| 226 | &PrintUsage::print_options_xml($pluginoptions->{'args'});
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| 227 | }
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| 228 |
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| 229 | # Recurse up the plugin hierarchy
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| 230 | $self->print_xml();
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| 231 |
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| 232 | gsprintf(STDERR, " </Arguments>\n");
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| 233 | gsprintf(STDERR, "</PlugInfo>\n");
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| 234 | }
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| 235 |
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| 236 |
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| 237 | sub print_txt_usage
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| 238 | {
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| 239 | my $self = shift(@_);
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| 240 |
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| 241 | # Print the usage message for a plugin (recursively)
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| 242 | my $descoffset = $self->determine_description_offset(0);
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| 243 | $self->print_plugin_usage($descoffset, 1);
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| 244 | }
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| 245 |
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| 246 |
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| 247 | sub determine_description_offset
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| 248 | {
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| 249 | my $self = shift(@_);
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| 250 | my $maxoffset = shift(@_);
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| 251 |
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| 252 | my $optionlistref = $self->{'option_list'};
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| 253 | my @optionlist = @$optionlistref;
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| 254 | my $pluginoptions = pop(@$optionlistref);
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| 255 | return $maxoffset if (!defined($pluginoptions));
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| 256 |
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| 257 | # Find the length of the longest option string of this plugin
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| 258 | my $pluginargs = $pluginoptions->{'args'};
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| 259 | if (defined($pluginargs)) {
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| 260 | my $longest = &PrintUsage::find_longest_option_string($pluginargs);
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| 261 | if ($longest > $maxoffset) {
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| 262 | $maxoffset = $longest;
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| 263 | }
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| 264 | }
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| 265 |
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| 266 | # Recurse up the plugin hierarchy
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| 267 | $maxoffset = $self->determine_description_offset($maxoffset);
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| 268 | $self->{'option_list'} = \@optionlist;
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| 269 | return $maxoffset;
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| 270 | }
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| 271 |
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| 272 |
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| 273 | sub print_plugin_usage
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| 274 | {
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| 275 | my $self = shift(@_);
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| 276 | my $descoffset = shift(@_);
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| 277 | my $isleafclass = shift(@_);
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| 278 |
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| 279 | my $optionlistref = $self->{'option_list'};
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| 280 | my @optionlist = @$optionlistref;
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| 281 | my $pluginoptions = pop(@$optionlistref);
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| 282 | return if (!defined($pluginoptions));
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| 283 |
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| 284 | my $pluginname = $pluginoptions->{'name'};
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| 285 | my $pluginargs = $pluginoptions->{'args'};
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| 286 | my $plugindesc = $pluginoptions->{'desc'};
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| 287 |
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| 288 | # Produce the usage information using the data structure above
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| 289 | if ($isleafclass) {
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| 290 | if (defined($plugindesc)) {
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| 291 | gsprintf(STDERR, "$plugindesc\n\n");
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| 292 | }
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| 293 | gsprintf(STDERR, " {common.usage}: plugin $pluginname [{common.options}]\n\n");
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| 294 | }
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| 295 |
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| 296 | # Display the plugin options, if there are some
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| 297 | if (defined($pluginargs)) {
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| 298 | # Calculate the column offset of the option descriptions
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| 299 | my $optiondescoffset = $descoffset + 2; # 2 spaces between options & descriptions
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| 300 |
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| 301 | if ($isleafclass) {
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| 302 | gsprintf(STDERR, " {common.specific_options}:\n");
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| 303 | }
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| 304 | else {
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| 305 | gsprintf(STDERR, " {common.general_options}:\n", $pluginname);
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| 306 | }
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| 307 |
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| 308 | # Display the plugin options
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| 309 | &PrintUsage::print_options_txt($pluginargs, $optiondescoffset);
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| 310 | }
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| 311 |
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| 312 | # Recurse up the plugin hierarchy
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| 313 | $self->print_plugin_usage($descoffset, 0);
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| 314 | $self->{'option_list'} = \@optionlist;
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| 315 | }
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| 316 |
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| 317 |
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| 318 | sub new {
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| 319 | my $class = shift (@_);
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| 320 | my $plugin_name = shift (@_);
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| 321 | my $self = {};
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| 322 | $self->{'plugin_type'} = "BasPlug";
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| 323 |
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| 324 | if (GISBasPlug::has_mapdata()) {
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| 325 | push(@$arguments,@$gis_arguments);
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| 326 | }
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| 327 |
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| 328 | my $enc = "^(";
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| 329 | map {$enc .= "$_|";} keys %$encodings::encodings;
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| 330 | my $denc = $enc . "ascii|utf8|unicode)\$";
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| 331 | $enc .= "ascii|utf8|unicode|auto)\$";
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| 332 |
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| 333 | $self->{'outhandle'} = STDERR;
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| 334 | my $year = (localtime)[5]+1900;
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| 335 |
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| 336 | $self->{'textcat'} = new textcat();
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| 337 |
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| 338 | $self->{'num_processed'} = 0;
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| 339 | $self->{'num_not_processed'} = 0;
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| 340 | $self->{'num_blocked'} = 0;
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| 341 | $self->{'num_archives'} = 0;
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| 342 | $self->{'cover_image'} = 1; # cover image is on by default
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| 343 |
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| 344 | # 14-05-02 To allow for proper inheritance of arguments - John Thompson
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| 345 | $self->{'option_list'} = [ $options ];
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| 346 |
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| 347 | my $no_cover_image = 0;
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| 348 | # general options available to all plugins
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| 349 | if (!parsargv::parse(\@_,
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| 350 | q^process_exp/.*/^, \$self->{'process_exp'},
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| 351 | q^block_exp/.*/^, \$self->{'block_exp'},
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| 352 | q^associate_ext/.*/^, \$self->{'associate_ext'},
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| 353 | q^extract_language^, \$self->{'extract_language'},
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| 354 | q^extract_acronyms^, \$self->{'extract_acronyms'},
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| 355 | q^extract_keyphrases^, \$self->{'kea'}, #with extra options (UNDOCUMENTED)
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| 356 | q^extract_keyphrase_options/.*/^, \$self->{'kea_options'}, #no extra options (UNDOCUMENTED)
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| 357 | qq^input_encoding/$enc/auto^, \$self->{'input_encoding'},
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| 358 | qq^default_encoding/$denc/utf8^, \$self->{'default_encoding'},
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| 359 | q^extract_email^, \$self->{'extract_email'},
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| 360 | q^extract_placenames^, \$self->{'extract_placenames'},
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| 361 | q^gazetteer/.*/^, \$self->{'gazetteer'},
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| 362 | q^place_list^, \$self->{'place_list'},
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| 363 | q^markup_acronyms^, \$self->{'markup_acronyms'},
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| 364 | q^default_language/.{2}/en^, \$self->{'default_language'},
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| 365 | q^first/.*/^, \$self->{'first'},
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| 366 | q^extract_historical_years^, \$self->{'date_extract'},
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| 367 | qq^maximum_year/\\d{4}/$year^, \$self->{'max_year'},
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| 368 | q^no_bibliography^, \$self->{'no_biblio'},
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| 369 | qq^maximum_century/-?\\d{1,2}( ?B\\.C\\.E\\.)?/-1^, \$self->{'max_century'},
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| 370 | q^no_cover_image^, \$no_cover_image,
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| 371 | q^separate_cjk^, \$self->{'separate_cjk'},
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| 372 | q^smart_block^, \$self->{'smart_block'},
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| 373 | q^smart_block_BN^, \$self->{'smart_block_BN'},
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| 374 | "allow_extra_options")) {
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| 375 |
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| 376 | gsprintf(STDERR, "\n{BasPlug.bad_general_option}\n", $plugin_name);
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| 377 | bless $self, $class;
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| 378 | $self->print_txt_usage(""); # Use default resource bundle
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| 379 | die "\n";
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| 380 | }
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| 381 |
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| 382 | my $associate_ext = $self->{'associate_ext'};
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| 383 | if ((defined $associate_ext) && ($associate_ext ne "")) {
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| 384 | my @exts = split(/,/,$associate_ext);
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| 385 |
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| 386 | my %associate_ext_lookup = ();
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| 387 | foreach my $e (@exts) {
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| 388 | $associate_ext_lookup{$e} = 1;
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| 389 | }
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| 390 |
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| 391 | $self->{'associate_ext_lookup'} = \%associate_ext_lookup;
|
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| 392 | }
|
|---|
| 393 |
|
|---|
| 394 | $self->{'shared_fileroot'} = {};
|
|---|
| 395 | $self->{'file_blocks'} = {};
|
|---|
| 396 |
|
|---|
| 397 | $self->{'cover_image'} = 0 if ($no_cover_image);
|
|---|
| 398 |
|
|---|
| 399 | if ($self->{'extract_placenames'}) {
|
|---|
| 400 |
|
|---|
| 401 | my $outhandle = $self->{'outhandle'};
|
|---|
| 402 |
|
|---|
| 403 | my $places_ref
|
|---|
| 404 | = GISBasPlug::loadGISDatabase($outhandle,$self->{'gazetteer'});
|
|---|
| 405 |
|
|---|
| 406 | if (!defined $places_ref) {
|
|---|
| 407 | print $outhandle "Warning: Error loading mapdata gazetteer \"$self->{'gazetteer'}\"\n";
|
|---|
| 408 | print $outhandle " No placename extraction will take place.\n";
|
|---|
| 409 | $self->{'extract_placenames'} = undef;
|
|---|
| 410 | }
|
|---|
| 411 | else {
|
|---|
| 412 | $self->{'places'} = $places_ref;
|
|---|
| 413 | }
|
|---|
| 414 | }
|
|---|
| 415 | return bless $self, $class;
|
|---|
| 416 | }
|
|---|
| 417 |
|
|---|
| 418 | # initialize BasPlug options
|
|---|
| 419 | # if init() is overridden in a sub-class, remember to call BasPlug::init()
|
|---|
| 420 | sub init {
|
|---|
| 421 | my $self = shift (@_);
|
|---|
| 422 | my ($verbosity, $outhandle, $failhandle) = @_;
|
|---|
| 423 |
|
|---|
| 424 | # verbosity is passed through from the processor
|
|---|
| 425 | $self->{'verbosity'} = $verbosity;
|
|---|
| 426 |
|
|---|
| 427 | # as are the outhandle and failhandle
|
|---|
| 428 | $self->{'outhandle'} = $outhandle if defined $outhandle;
|
|---|
| 429 | $self->{'failhandle'} = $failhandle;
|
|---|
| 430 |
|
|---|
| 431 | # set process_exp and block_exp to defaults unless they were
|
|---|
| 432 | # explicitly set
|
|---|
| 433 |
|
|---|
| 434 | if ((!$self->is_recursive()) and
|
|---|
| 435 | (!defined $self->{'process_exp'}) || ($self->{'process_exp'} eq "")) {
|
|---|
| 436 |
|
|---|
| 437 | $self->{'process_exp'} = $self->get_default_process_exp ();
|
|---|
| 438 | if ($self->{'process_exp'} eq "") {
|
|---|
| 439 | warn ref($self) . " Warning: Non-recursive plugin has no process_exp\n";
|
|---|
| 440 | }
|
|---|
| 441 | }
|
|---|
| 442 |
|
|---|
| 443 | if ((!defined $self->{'block_exp'}) || ($self->{'block_exp'} eq "")) {
|
|---|
| 444 | $self->{'block_exp'} = $self->get_default_block_exp ();
|
|---|
| 445 | }
|
|---|
| 446 | }
|
|---|
| 447 |
|
|---|
| 448 | sub begin {
|
|---|
| 449 | my $self = shift (@_);
|
|---|
| 450 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
|
|---|
| 451 | $self->initialise_extractors();
|
|---|
| 452 | }
|
|---|
| 453 |
|
|---|
| 454 | sub end {
|
|---|
| 455 | my ($self) = @_;
|
|---|
| 456 | $self->finalise_extractors();
|
|---|
| 457 | }
|
|---|
| 458 |
|
|---|
| 459 | # this function should be overridden to return 1
|
|---|
| 460 | # in recursive plugins
|
|---|
| 461 | sub is_recursive {
|
|---|
| 462 | my $self = shift (@_);
|
|---|
| 463 |
|
|---|
| 464 | return 0;
|
|---|
| 465 | }
|
|---|
| 466 |
|
|---|
| 467 | sub get_default_block_exp {
|
|---|
| 468 | my $self = shift (@_);
|
|---|
| 469 |
|
|---|
| 470 | return "";
|
|---|
| 471 | }
|
|---|
| 472 |
|
|---|
| 473 | sub get_default_process_exp {
|
|---|
| 474 | my $self = shift (@_);
|
|---|
| 475 |
|
|---|
| 476 | return "";
|
|---|
| 477 | }
|
|---|
| 478 |
|
|---|
| 479 | # default implementation is to do nothing.
|
|---|
| 480 | sub store_block_files
|
|---|
| 481 | {
|
|---|
| 482 | my $self =shift (@_);
|
|---|
| 483 | my ($filename) = @_;
|
|---|
| 484 | return;
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | #default implementation is to block a file with same name as this, but extension jpg or JPG, if cover_images is on.
|
|---|
| 488 | sub block_cover_image
|
|---|
| 489 | {
|
|---|
| 490 | my $self =shift (@_);
|
|---|
| 491 | my ($filename) = @_;
|
|---|
| 492 | if ($self->{'cover_image'}) {
|
|---|
| 493 | my $coverfile = $filename;
|
|---|
| 494 | $coverfile =~ s/\.[^\\\/\.]+$/\.jpg/;
|
|---|
| 495 | if (!-e $coverfile) {
|
|---|
| 496 | $coverfile =~ s/jpg$/JPG/;
|
|---|
| 497 | }
|
|---|
| 498 | if (-e $coverfile) {
|
|---|
| 499 | $self->{'file_blocks'}->{$coverfile} = 1;
|
|---|
| 500 | }
|
|---|
| 501 | }
|
|---|
| 502 |
|
|---|
| 503 | return;
|
|---|
| 504 | }
|
|---|
| 505 |
|
|---|
| 506 | sub metadata_read {
|
|---|
| 507 | my $self = shift (@_);
|
|---|
| 508 | my ($pluginfo, $base_dir, $file, $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
|
|---|
| 509 | # Keep track of filenames with same root but different extensions
|
|---|
| 510 | # Used to support -associate_ext
|
|---|
| 511 |
|
|---|
| 512 | my $associate_ext = $self->{'associate_ext'};
|
|---|
| 513 | if ((defined $associate_ext) && ($associate_ext ne "")) {
|
|---|
| 514 |
|
|---|
| 515 | my ($file_prefix,$file_ext) = ($file =~ m/^(.*)\.(.*?)$/);
|
|---|
| 516 | if ((defined $file_prefix) && (defined $file_ext)) {
|
|---|
| 517 |
|
|---|
| 518 | my $shared_fileroot = $self->{'shared_fileroot'};
|
|---|
| 519 | if (!defined $shared_fileroot->{$file_prefix}) {
|
|---|
| 520 | my $file_prefix_rec = { 'tie_to' => undef, 'exts' => {} };
|
|---|
| 521 | $shared_fileroot->{$file_prefix} = $file_prefix_rec;
|
|---|
| 522 | }
|
|---|
| 523 |
|
|---|
| 524 | my $file_prefix_rec = $shared_fileroot->{$file_prefix};
|
|---|
| 525 |
|
|---|
| 526 | my $process_exp = $self->{'process_exp'};
|
|---|
| 527 |
|
|---|
| 528 | if ($file =~ m/$self->{'process_exp'}/) {
|
|---|
| 529 | # This is the document the others should be tied to
|
|---|
| 530 | $file_prefix_rec->{'tie_to'} = $file_ext;
|
|---|
| 531 | }
|
|---|
| 532 | else {
|
|---|
| 533 | if (defined $self->{'associate_ext_lookup'}->{$file_ext}) {
|
|---|
| 534 | $file_prefix_rec->{'exts'}->{$file_ext} = 1;
|
|---|
| 535 | }
|
|---|
| 536 | }
|
|---|
| 537 | }
|
|---|
| 538 | }
|
|---|
| 539 |
|
|---|
| 540 | # now check whether we are actually processing this
|
|---|
| 541 | my $filename = $file;
|
|---|
| 542 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
|---|
| 543 | if ($self->{'process_exp'} eq "" || $filename !~ /$self->{'process_exp'}/ || !-f $filename) {
|
|---|
| 544 | return undef; # can't recognise
|
|---|
| 545 | }
|
|---|
| 546 |
|
|---|
| 547 | # do smart blocking if appropriate
|
|---|
| 548 | if (defined $self->{'smart_block'}) {
|
|---|
| 549 | $self->block_cover_image($filename);
|
|---|
| 550 | $self->store_block_files($filename);
|
|---|
| 551 | }
|
|---|
| 552 |
|
|---|
| 553 | return 1;
|
|---|
| 554 | }
|
|---|
| 555 |
|
|---|
| 556 | sub tie_to_filename
|
|---|
| 557 | {
|
|---|
| 558 | my $self = shift (@_);
|
|---|
| 559 |
|
|---|
| 560 | my ($file_ext,$file_prefix_rec) = @_;
|
|---|
| 561 |
|
|---|
| 562 | if (defined $file_prefix_rec) {
|
|---|
| 563 | my $tie_to = $file_prefix_rec->{'tie_to'};
|
|---|
| 564 |
|
|---|
| 565 | if (defined $tie_to) {
|
|---|
| 566 | if ($tie_to eq $file_ext) {
|
|---|
| 567 | return 1;
|
|---|
| 568 | }
|
|---|
| 569 | }
|
|---|
| 570 | }
|
|---|
| 571 |
|
|---|
| 572 | return 0;
|
|---|
| 573 | }
|
|---|
| 574 |
|
|---|
| 575 | sub tie_to_assoc_file
|
|---|
| 576 | {
|
|---|
| 577 | my $self = shift (@_);
|
|---|
| 578 | my ($file_ext,$file_prefix_rec) = @_;
|
|---|
| 579 |
|
|---|
| 580 | if (defined $file_prefix_rec) {
|
|---|
| 581 | my $tie_to = $file_prefix_rec->{'tie_to'};
|
|---|
| 582 | if (defined $tie_to) {
|
|---|
| 583 |
|
|---|
| 584 | my $exts = $file_prefix_rec->{'exts'};
|
|---|
| 585 |
|
|---|
| 586 | my $has_file_ext = $exts->{$file_ext};
|
|---|
| 587 |
|
|---|
| 588 | if ($has_file_ext) {
|
|---|
| 589 | return 1;
|
|---|
| 590 | }
|
|---|
| 591 | }
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | return 0;
|
|---|
| 595 | }
|
|---|
| 596 |
|
|---|
| 597 |
|
|---|
| 598 | sub associate_with
|
|---|
| 599 | {
|
|---|
| 600 | my $self = shift (@_);
|
|---|
| 601 | my ($file, $filename, $metadata) = @_;
|
|---|
| 602 |
|
|---|
| 603 | my $associate_ext = $self->{'associate_ext'};
|
|---|
| 604 |
|
|---|
| 605 |
|
|---|
| 606 | return 0 if (!$associate_ext);
|
|---|
| 607 |
|
|---|
| 608 | # If file, see if matches with "tie_to" doc or is one of the
|
|---|
| 609 | # associated filename extensions.
|
|---|
| 610 |
|
|---|
| 611 | my ($file_prefix,$file_ext) = ($file =~ m/^(.*)\.(.*?)$/);
|
|---|
| 612 | if ((defined $file_prefix) && (defined $file_ext)) {
|
|---|
| 613 |
|
|---|
| 614 | my $file_prefix_rec = $self->{'shared_fileroot'}->{$file_prefix};
|
|---|
| 615 |
|
|---|
| 616 | if ($self->tie_to_filename($file_ext,$file_prefix_rec)) {
|
|---|
| 617 |
|
|---|
| 618 | # Set up gsdlassocfile_tobe
|
|---|
| 619 |
|
|---|
| 620 | my $exts = $file_prefix_rec->{'exts'};
|
|---|
| 621 |
|
|---|
| 622 | if (!defined $metadata->{'gsdlassocfile_tobe'}) {
|
|---|
| 623 | $metadata->{'gsdlassocfile_tobe'} = [];
|
|---|
| 624 | }
|
|---|
| 625 |
|
|---|
| 626 | my $assoc_tobe = $metadata->{'gsdlassocfile_tobe'};
|
|---|
| 627 |
|
|---|
| 628 | my ($full_prefix) = ($filename =~ m/^(.*)\..*?$/);
|
|---|
| 629 | foreach my $e (keys %$exts) {
|
|---|
| 630 | my $assoc_file = "$full_prefix.$e";
|
|---|
| 631 | my $mime_type = ""; # let system auto detect this
|
|---|
| 632 | push(@$assoc_tobe,"$assoc_file:$mime_type:");
|
|---|
| 633 | }
|
|---|
| 634 | }
|
|---|
| 635 | elsif ($self->tie_to_assoc_file($file_ext,$file_prefix_rec)) {
|
|---|
| 636 | # a form of smart block
|
|---|
| 637 |
|
|---|
| 638 | return 1;
|
|---|
| 639 | }
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | return 0;
|
|---|
| 643 | }
|
|---|
| 644 |
|
|---|
| 645 |
|
|---|
| 646 | # The BasPlug read() function. This function does all the right things
|
|---|
| 647 | # to make general options work for a given plugin. It calls the process()
|
|---|
| 648 | # function which does all the work specific to a plugin (like the old
|
|---|
| 649 | # read functions used to do). Most plugins should define their own
|
|---|
| 650 | # process() function and let this read() function keep control.
|
|---|
| 651 | #
|
|---|
| 652 | # recursive plugins (e.g. RecPlug) and specialized plugins like those
|
|---|
| 653 | # capable of processing many documents within a single file (e.g.
|
|---|
| 654 | # GMLPlug) should normally implement their own version of read()
|
|---|
| 655 | #
|
|---|
| 656 | # Return number of files processed, undef if can't recognise, -1 if can't
|
|---|
| 657 | # process
|
|---|
| 658 | # Note that $base_dir might be "" and that $file might
|
|---|
| 659 | # include directories
|
|---|
| 660 |
|
|---|
| 661 | sub read {
|
|---|
| 662 | my $self = shift (@_);
|
|---|
| 663 |
|
|---|
| 664 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
|---|
| 665 |
|
|---|
| 666 | if ($self->is_recursive()) {
|
|---|
| 667 | gsprintf(STDERR, "{BasPlug.read_must_be_implemented}") && die "\n";
|
|---|
| 668 | }
|
|---|
| 669 |
|
|---|
| 670 | my $outhandle = $self->{'outhandle'};
|
|---|
| 671 | my $smart_block = $self->{'smart_block'};
|
|---|
| 672 | my $smart_block_BN = $self->{'smart_block_BN'};
|
|---|
| 673 |
|
|---|
| 674 | my $filename = $file;
|
|---|
| 675 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
|---|
| 676 |
|
|---|
| 677 | if ($self->associate_with($file,$filename,$metadata)) {
|
|---|
| 678 | # a form of smart block
|
|---|
| 679 | $self->{'num_blocked'} ++;
|
|---|
| 680 | return 0; # blocked
|
|---|
| 681 | }
|
|---|
| 682 |
|
|---|
| 683 | if ($smart_block || $smart_block_BN) {
|
|---|
| 684 | if (defined $self->{'file_blocks'}->{$filename} && $self->{'file_blocks'}->{$filename} == 1){
|
|---|
| 685 | $self->{'num_blocked'} ++;
|
|---|
| 686 | return 0; # blocked
|
|---|
| 687 | }
|
|---|
| 688 | } elsif ($self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/) {
|
|---|
| 689 | $self->{'num_blocked'} ++;
|
|---|
| 690 | return 0; # blocked
|
|---|
| 691 | }
|
|---|
| 692 |
|
|---|
| 693 | if ($filename !~ /$self->{'process_exp'}/ || !-f $filename) {
|
|---|
| 694 | return undef; # can't recognise
|
|---|
| 695 | }
|
|---|
| 696 | $file =~ s/^[\/\\]+//; # $file often begins with / so we'll tidy it up
|
|---|
| 697 |
|
|---|
| 698 | # Do encoding stuff
|
|---|
| 699 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
|
|---|
| 700 |
|
|---|
| 701 | # create a new document
|
|---|
| 702 | my $doc_obj = new doc ($filename, "indexed_doc");
|
|---|
| 703 | $doc_obj->set_OIDtype ($processor->{'OIDtype'});
|
|---|
| 704 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Language", $language);
|
|---|
| 705 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Encoding", $encoding);
|
|---|
| 706 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
|
|---|
| 707 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "FileSize", (-s $filename));
|
|---|
| 708 |
|
|---|
| 709 | my ($filemeta) = $file =~ /([^\\\/]+)$/;
|
|---|
| 710 | # how do we know what encoding the filename is in?
|
|---|
| 711 | $doc_obj->add_metadata($doc_obj->get_top_section(), "Source", &ghtml::dmsafe($filemeta));
|
|---|
| 712 | if ($self->{'cover_image'}) {
|
|---|
| 713 | $self->associate_cover_image($doc_obj, $filename);
|
|---|
| 714 | }
|
|---|
| 715 |
|
|---|
| 716 | # read in file ($text will be in utf8)
|
|---|
| 717 | my $text = "";
|
|---|
| 718 | $self->read_file ($filename, $encoding, $language, \$text);
|
|---|
| 719 |
|
|---|
| 720 | if (!length ($text)) {
|
|---|
| 721 | my $plugin_name = ref ($self);
|
|---|
| 722 | if ($gli) {
|
|---|
| 723 | print STDERR "<ProcessingError n='$file' r='File contains no text'>\n";
|
|---|
| 724 | }
|
|---|
| 725 | gsprintf($outhandle, "$plugin_name: {BasPlug.file_has_no_text}\n", $filename) if $self->{'verbosity'};
|
|---|
| 726 |
|
|---|
| 727 | my $failhandle = $self->{'failhandle'};
|
|---|
| 728 | gsprintf($failhandle, "$file: " . ref($self) . ": {BasPlug.empty_file}\n");
|
|---|
| 729 | # print $failhandle "$file: " . ref($self) . ": file contains no text\n";
|
|---|
| 730 | $self->{'num_not_processed'} ++;
|
|---|
| 731 |
|
|---|
| 732 | return 0; # what should we return here?? error but don't want to pass it on
|
|---|
| 733 | }
|
|---|
| 734 |
|
|---|
| 735 | # include any metadata passed in from previous plugins
|
|---|
| 736 | # note that this metadata is associated with the top level section
|
|---|
| 737 |
|
|---|
| 738 | $self->extra_metadata ($doc_obj, $doc_obj->get_top_section(), $metadata);
|
|---|
| 739 |
|
|---|
| 740 | # do plugin specific processing of doc_obj
|
|---|
| 741 | unless (defined ($self->process (\$text, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
|
|---|
| 742 | $text = '';
|
|---|
| 743 | undef $text;
|
|---|
| 744 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
|---|
| 745 | return -1;
|
|---|
| 746 | }
|
|---|
| 747 | $text='';
|
|---|
| 748 | undef $text;
|
|---|
| 749 |
|
|---|
| 750 | # do any automatic metadata extraction
|
|---|
| 751 | $self->auto_extract_metadata ($doc_obj);
|
|---|
| 752 |
|
|---|
| 753 | # add an OID
|
|---|
| 754 | # see if there is a plugin-specific set_OID function...
|
|---|
| 755 | if (defined ($self->can('set_OID'))) {
|
|---|
| 756 | # it will need $doc_obj to set the Identifier metadata...
|
|---|
| 757 | $self->set_OID($doc_obj);
|
|---|
| 758 | } else {
|
|---|
| 759 | # use the default set_OID() in doc.pm
|
|---|
| 760 | $doc_obj->set_OID();
|
|---|
| 761 | }
|
|---|
| 762 |
|
|---|
| 763 | # process the document
|
|---|
| 764 | $processor->process($doc_obj);
|
|---|
| 765 |
|
|---|
| 766 | if(defined($self->{'places_filename'})){
|
|---|
| 767 | &util::rm($self->{'places_filename'});
|
|---|
| 768 | $self->{'places_filename'} = undef;
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | $self->{'num_processed'} ++;
|
|---|
| 772 | undef $doc_obj;
|
|---|
| 773 | return 1; # processed the file
|
|---|
| 774 | }
|
|---|
| 775 |
|
|---|
| 776 | # returns undef if file is rejected by the plugin
|
|---|
| 777 | sub process {
|
|---|
| 778 | my $self = shift (@_);
|
|---|
| 779 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
|
|---|
| 780 |
|
|---|
| 781 | gsprintf(STDERR, "BasPlug::process {common.must_be_implemented}\n") && die "\n";
|
|---|
| 782 | # die "Basplug::process function must be implemented in sub-class\n";
|
|---|
| 783 |
|
|---|
| 784 | return undef; # never gets here
|
|---|
| 785 | }
|
|---|
| 786 |
|
|---|
| 787 | # uses the multiread package to read in the entire file pointed to
|
|---|
| 788 | # by filename and loads the resulting text into $$textref. Input text
|
|---|
| 789 | # may be in any of the encodings handled by multiread, output text
|
|---|
| 790 | # will be in utf8
|
|---|
| 791 | sub read_file {
|
|---|
| 792 | my $self = shift (@_);
|
|---|
| 793 | my ($filename, $encoding, $language, $textref) = @_;
|
|---|
| 794 |
|
|---|
| 795 | if (!-r $filename)
|
|---|
| 796 | {
|
|---|
| 797 | my $outhandle = $self->{'outhandle'};
|
|---|
| 798 | gsprintf($outhandle, "{BasPlug.read_denied}\n", $filename) if $self->{'verbosity'};
|
|---|
| 799 | # print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
|
|---|
| 800 | return;
|
|---|
| 801 | }
|
|---|
| 802 |
|
|---|
| 803 | $$textref = "";
|
|---|
| 804 |
|
|---|
| 805 | if (!open (FILE, $filename)) {
|
|---|
| 806 | gsprintf(STDERR, "BasPlug::read_file {BasPlug.could_not_open_for_reading} ($!)\n", $filename);
|
|---|
| 807 | die "\n";
|
|---|
| 808 | }
|
|---|
| 809 |
|
|---|
| 810 | if ($encoding eq "ascii") {
|
|---|
| 811 | undef $/;
|
|---|
| 812 | $$textref = <FILE>;
|
|---|
| 813 | $/ = "\n";
|
|---|
| 814 | } else {
|
|---|
| 815 | my $reader = new multiread();
|
|---|
| 816 | $reader->set_handle ('BasPlug::FILE');
|
|---|
| 817 | $reader->set_encoding ($encoding);
|
|---|
| 818 | $reader->read_file ($textref);
|
|---|
| 819 |
|
|---|
| 820 | #Now segments chinese if the separate_cjk option is set
|
|---|
| 821 | if ($self->{'separate_cjk'}) {
|
|---|
| 822 | # segment the Chinese words
|
|---|
| 823 | $$textref = &cnseg::segment($$textref);
|
|---|
| 824 | }
|
|---|
| 825 | }
|
|---|
| 826 |
|
|---|
| 827 | close FILE;
|
|---|
| 828 | }
|
|---|
| 829 |
|
|---|
| 830 | sub filename_based_title
|
|---|
| 831 | {
|
|---|
| 832 | my $self = shift (@_);
|
|---|
| 833 | my ($file) = @_;
|
|---|
| 834 |
|
|---|
| 835 | my $file_derived_title = $file;
|
|---|
| 836 | $file_derived_title =~ s/_/ /g;
|
|---|
| 837 | $file_derived_title =~ s/\..*?$//;
|
|---|
| 838 |
|
|---|
| 839 | return $file_derived_title;
|
|---|
| 840 | }
|
|---|
| 841 |
|
|---|
| 842 |
|
|---|
| 843 | sub title_fallback
|
|---|
| 844 | {
|
|---|
| 845 | my $self = shift (@_);
|
|---|
| 846 | my ($doc_obj,$section,$file) = @_;
|
|---|
| 847 |
|
|---|
| 848 | if (!defined $doc_obj->get_metadata_element ($section, "Title")) {
|
|---|
| 849 |
|
|---|
| 850 | my $file_derived_title = $self->filename_based_title($file);
|
|---|
| 851 | $doc_obj->add_metadata ($section, "Title", $file_derived_title);
|
|---|
| 852 | }
|
|---|
| 853 | }
|
|---|
| 854 |
|
|---|
| 855 | sub textcat_get_language_encoding {
|
|---|
| 856 | my $self = shift (@_);
|
|---|
| 857 | my ($filename) = @_;
|
|---|
| 858 |
|
|---|
| 859 | my ($language, $encoding, $extracted_encoding);
|
|---|
| 860 | if ($self->{'input_encoding'} eq "auto") {
|
|---|
| 861 | # use textcat to automatically work out the input encoding and language
|
|---|
| 862 | ($language, $encoding) = $self->get_language_encoding ($filename);
|
|---|
| 863 | } elsif ($self->{'extract_language'}) {
|
|---|
| 864 | # use textcat to get language metadata
|
|---|
| 865 | ($language, $extracted_encoding) = $self->get_language_encoding ($filename);
|
|---|
| 866 | $encoding = $self->{'input_encoding'};
|
|---|
| 867 | # don't print this message for english... english in utf8 is identical
|
|---|
| 868 | # to english in iso-8859-1 (except for some punctuation). We don't have
|
|---|
| 869 | # a language model for en_utf8, so textcat always says iso-8859-1!
|
|---|
| 870 | if ($extracted_encoding ne $encoding && $language ne "en"
|
|---|
| 871 | && $self->{'verbosity'}) {
|
|---|
| 872 | my $plugin_name = ref ($self);
|
|---|
| 873 | my $outhandle = $self->{'outhandle'};
|
|---|
| 874 | gsprintf($outhandle, "$plugin_name: {BasPlug.wrong_encoding}\n", $filename, $encoding, $extracted_encoding);
|
|---|
| 875 | # print $outhandle "$plugin_name: WARNING: $filename was read using $encoding encoding but ";
|
|---|
| 876 | # print $outhandle "appears to be encoded as $extracted_encoding.\n";
|
|---|
| 877 | }
|
|---|
| 878 | } else {
|
|---|
| 879 | $language = $self->{'default_language'};
|
|---|
| 880 | $encoding = $self->{'input_encoding'};
|
|---|
| 881 | }
|
|---|
| 882 | return ($language, $encoding);
|
|---|
| 883 | }
|
|---|
| 884 |
|
|---|
| 885 | # Uses textcat to work out the encoding and language of the text in
|
|---|
| 886 | # $filename. All html tags are removed before processing.
|
|---|
| 887 | # returns an array containing "language" and "encoding"
|
|---|
| 888 | sub get_language_encoding {
|
|---|
| 889 | my $self = shift (@_);
|
|---|
| 890 | my ($filename) = @_;
|
|---|
| 891 | my $outhandle = $self->{'outhandle'};
|
|---|
| 892 | my $unicode_format = "";
|
|---|
| 893 | # read in file
|
|---|
| 894 | open (FILE, $filename) || (gsprintf(STDERR, "BasPlug::get_language_encoding {BasPlug.could_not_open_for_reading} ($!)\n", $filename) && die "\n"); # die "BasPlug::get_language_encoding could not open $filename for reading ($!)\n";
|
|---|
| 895 | undef $/;
|
|---|
| 896 | my $text = <FILE>;
|
|---|
| 897 | $/ = "\n";
|
|---|
| 898 | close FILE;
|
|---|
| 899 |
|
|---|
| 900 | # check if first few bytes have a Byte Order Marker
|
|---|
| 901 | my $bom=substr($text,0,2); # check 16bit unicode
|
|---|
| 902 | if ($bom eq "\xff\xfe") { # little endian 16bit unicode
|
|---|
| 903 | $unicode_format="unicode";
|
|---|
| 904 | } elsif ($bom eq "\xfe\xff") { # big endian 16bit unicode
|
|---|
| 905 | $unicode_format="unicode";
|
|---|
| 906 | } else {
|
|---|
| 907 | $bom=substr($text,0,3); # check utf-8
|
|---|
| 908 | if ($bom eq "\xef\xbb\xbf") { # utf-8 coded FEFF bom
|
|---|
| 909 | $unicode_format="utf8";
|
|---|
| 910 | # } elsif ($bom eq "\xef\xbf\xbe") { # utf-8 coded FFFE bom. Error!?
|
|---|
| 911 | # $unicode_format="utf8";
|
|---|
| 912 | }
|
|---|
| 913 | }
|
|---|
| 914 |
|
|---|
| 915 |
|
|---|
| 916 | # remove <title>stuff</title> -- as titles tend often to be in English
|
|---|
| 917 | # for foreign language documents
|
|---|
| 918 | $text =~ s/<title>(.|\n)*?<\/title>//i;
|
|---|
| 919 |
|
|---|
| 920 | # remove all HTML tags
|
|---|
| 921 | # XXX this doesn't match plugins derived from HTMLPlug (except ConvertTo)
|
|---|
| 922 | if (ref($self) eq 'HTMLPlug' ||
|
|---|
| 923 | (exists $self->{'converted_to'} && $self->{'converted_to'} eq 'HTML')){
|
|---|
| 924 | $text =~ s/<[^>]*>//sg;
|
|---|
| 925 | }
|
|---|
| 926 |
|
|---|
| 927 | # get the language/encoding
|
|---|
| 928 | my $results = $self->{'textcat'}->classify(\$text);
|
|---|
| 929 |
|
|---|
| 930 | # if textcat returns 3 or less possibilities we'll use the
|
|---|
| 931 | # first one in the list - otherwise use the defaults
|
|---|
| 932 | if (scalar @$results > 3) {
|
|---|
| 933 | my $best_encoding="";
|
|---|
| 934 | if ($unicode_format) { # in case the first had a BOM
|
|---|
| 935 | $best_encoding=$unicode_format;
|
|---|
| 936 | } else {
|
|---|
| 937 | my %guessed_encodings = ();
|
|---|
| 938 | foreach my $result (@$results) {
|
|---|
| 939 | $result =~ /([^\-]+)$/;
|
|---|
| 940 | my $enc=$1;
|
|---|
| 941 | if (!defined($guessed_encodings{$enc})) {
|
|---|
| 942 | $guessed_encodings{$enc}=0;
|
|---|
| 943 | }
|
|---|
| 944 | $guessed_encodings{$enc}++;
|
|---|
| 945 | }
|
|---|
| 946 |
|
|---|
| 947 | $guessed_encodings{""}=-1; # for default best_encoding of ""
|
|---|
| 948 | foreach my $enc (keys %guessed_encodings) {
|
|---|
| 949 | if ($guessed_encodings{$enc} >
|
|---|
| 950 | $guessed_encodings{$best_encoding}){
|
|---|
| 951 | $best_encoding=$enc;
|
|---|
| 952 | }
|
|---|
| 953 | }
|
|---|
| 954 | }
|
|---|
| 955 |
|
|---|
| 956 | if ($self->{'input_encoding'} ne 'auto') {
|
|---|
| 957 | if ($self->{'extract_language'} && $self->{'verbosity'}) {
|
|---|
| 958 | gsprintf($outhandle,
|
|---|
| 959 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
|---|
| 960 | $filename, $self->{'default_language'});
|
|---|
| 961 | }
|
|---|
| 962 | return ($self->{'default_language'}, $self->{'input_encoding'});
|
|---|
| 963 |
|
|---|
| 964 | } else {
|
|---|
| 965 | if ($self->{'verbosity'}) {
|
|---|
| 966 | gsprintf($outhandle,
|
|---|
| 967 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
|---|
| 968 | $filename, $self->{'default_language'});
|
|---|
| 969 | }
|
|---|
| 970 | return ($self->{'default_language'}, $best_encoding);
|
|---|
| 971 | }
|
|---|
| 972 | }
|
|---|
| 973 |
|
|---|
| 974 | # format language/encoding
|
|---|
| 975 | my ($language, $encoding) = $results->[0] =~ /^([^-]*)(?:-(.*))?$/;
|
|---|
| 976 | if (!defined $language) {
|
|---|
| 977 | if ($self->{'verbosity'}) {
|
|---|
| 978 | gsprintf($outhandle,
|
|---|
| 979 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
|---|
| 980 | $filename, $self->{'default_language'});
|
|---|
| 981 | }
|
|---|
| 982 | $language = $self->{'default_language'};
|
|---|
| 983 | }
|
|---|
| 984 | if (!defined $encoding) {
|
|---|
| 985 | if ($self->{'verbosity'}) {
|
|---|
| 986 | gsprintf($outhandle,
|
|---|
| 987 | "BasPlug: {BasPlug.could_not_extract_encoding}\n",
|
|---|
| 988 | $filename, $self->{'default_encoding'});
|
|---|
| 989 | }
|
|---|
| 990 | $encoding = $self->{'default_encoding'};
|
|---|
| 991 | }
|
|---|
| 992 |
|
|---|
| 993 |
|
|---|
| 994 | # check for equivalents where textcat doesn't have some encodings...
|
|---|
| 995 | # eg MS versions of standard encodings
|
|---|
| 996 | if ($encoding =~ /^iso_8859_(\d+)/) {
|
|---|
| 997 | my $iso = $1; # which variant of the iso standard?
|
|---|
| 998 | # iso-8859 sets don't use chars 0x80-0x9f, windows codepages do
|
|---|
| 999 | if ($text =~ /[\x80-\x9f]/) {
|
|---|
| 1000 | # Western Europe
|
|---|
| 1001 | if ($iso == 1 or $iso == 15) { $encoding = 'windows_1252' }
|
|---|
| 1002 | elsif ($iso == 2) { $encoding = 'windows_1250' } # Central Europe
|
|---|
| 1003 | elsif ($iso == 5) { $encoding = 'windows_1251' } # Cyrillic
|
|---|
| 1004 | elsif ($iso == 6) { $encoding = 'windows_1256' } # Arabic
|
|---|
| 1005 | elsif ($iso == 7) { $encoding = 'windows_1253' } # Greek
|
|---|
| 1006 | elsif ($iso == 8) { $encoding = 'windows_1255' } # Hebrew
|
|---|
| 1007 | elsif ($iso == 9) { $encoding = 'windows_1254' } # Turkish
|
|---|
| 1008 | }
|
|---|
| 1009 | }
|
|---|
| 1010 |
|
|---|
| 1011 | if ($encoding !~ /^(ascii|utf8|unicode)$/ &&
|
|---|
| 1012 | !defined $encodings::encodings->{$encoding}) {
|
|---|
| 1013 | if ($self->{'verbosity'}) {
|
|---|
| 1014 | gsprintf($outhandle, "BasPlug: {BasPlug.unsupported_encoding}\n",
|
|---|
| 1015 | $filename, $encoding, $self->{'default_encoding'});
|
|---|
| 1016 | }
|
|---|
| 1017 | $encoding = $self->{'default_encoding'};
|
|---|
| 1018 | }
|
|---|
| 1019 |
|
|---|
| 1020 | return ($language, $encoding);
|
|---|
| 1021 | }
|
|---|
| 1022 |
|
|---|
| 1023 | # add any extra metadata that's been passed around from one
|
|---|
| 1024 | # plugin to another.
|
|---|
| 1025 | # extra_metadata uses add_utf8_metadata so it expects metadata values
|
|---|
| 1026 | # to already be in utf8
|
|---|
| 1027 | sub extra_metadata {
|
|---|
| 1028 | my $self = shift (@_);
|
|---|
| 1029 | my ($doc_obj, $cursection, $metadata) = @_;
|
|---|
| 1030 |
|
|---|
| 1031 | foreach my $field (keys(%$metadata)) {
|
|---|
| 1032 | # $metadata->{$field} may be an array reference
|
|---|
| 1033 | if ($field eq "gsdlassocfile_tobe") {
|
|---|
| 1034 | # 'gsdlassocfile_tobe' is artificially introduced metadata
|
|---|
| 1035 | # that is used to signal that certain additional files should
|
|---|
| 1036 | # be tied to this document. Useful in situations where a
|
|---|
| 1037 | # metadata pass in the plugin pipeline works out some files
|
|---|
| 1038 | # need to be associated with a document, but the document hasn't
|
|---|
| 1039 | # been formed yet.
|
|---|
| 1040 |
|
|---|
| 1041 | my $equiv_form = "";
|
|---|
| 1042 | foreach my $gaf (@{$metadata->{$field}}) {
|
|---|
| 1043 | my ($full_filename,$mimetype) = ($gaf =~ m/^(.*):(.*):$/);
|
|---|
| 1044 | my ($tail_filename) = ($full_filename =~ /^.*[\/\\](.+?)$/);
|
|---|
| 1045 | my $filename = $full_filename;
|
|---|
| 1046 |
|
|---|
| 1047 | $doc_obj->associate_file($full_filename,$tail_filename,$mimetype);
|
|---|
| 1048 |
|
|---|
| 1049 | my ($doc_ext) = ($tail_filename =~ m/^.*\.(.*)$/);
|
|---|
| 1050 | my $start_doclink = "<a href=\"_httpcollection_/index/assoc/{Or}{[parent(Top):archivedir],[archivedir]}/$tail_filename\">";
|
|---|
| 1051 | my $srcicon = "_icon".$doc_ext."_";
|
|---|
| 1052 | my $end_doclink = "</a>";
|
|---|
| 1053 |
|
|---|
| 1054 | $equiv_form .= " $start_doclink\{If\}{$srcicon,$srcicon,$doc_ext\}$end_doclink";
|
|---|
| 1055 | }
|
|---|
| 1056 | $doc_obj->add_utf8_metadata ($cursection, "equivlink", $equiv_form);
|
|---|
| 1057 | }
|
|---|
| 1058 | elsif (ref ($metadata->{$field}) eq "ARRAY") {
|
|---|
| 1059 | map {
|
|---|
| 1060 | $doc_obj->add_utf8_metadata ($cursection, $field, $_);
|
|---|
| 1061 | } @{$metadata->{$field}};
|
|---|
| 1062 | } else {
|
|---|
| 1063 | $doc_obj->add_utf8_metadata ($cursection, $field, $metadata->{$field});
|
|---|
| 1064 | }
|
|---|
| 1065 | }
|
|---|
| 1066 | }
|
|---|
| 1067 |
|
|---|
| 1068 | # initialise metadata extractors
|
|---|
| 1069 | sub initialise_extractors {
|
|---|
| 1070 | my $self = shift (@_);
|
|---|
| 1071 |
|
|---|
| 1072 | if ($self->{'extract_acronyms'} || $self->{'markup_acronyms'}) {
|
|---|
| 1073 | &acronym::initialise_acronyms();
|
|---|
| 1074 | }
|
|---|
| 1075 | }
|
|---|
| 1076 |
|
|---|
| 1077 | # finalise metadata extractors
|
|---|
| 1078 | sub finalise_extractors {
|
|---|
| 1079 | my $self = shift (@_);
|
|---|
| 1080 |
|
|---|
| 1081 | if ($self->{'extract_acronyms'} || $self->{'markup_acronyms'}) {
|
|---|
| 1082 | &acronym::finalise_acronyms();
|
|---|
| 1083 | }
|
|---|
| 1084 | }
|
|---|
| 1085 |
|
|---|
| 1086 | # FIRSTNNN: extract the first NNN characters as metadata
|
|---|
| 1087 | sub extract_first_NNNN_characters {
|
|---|
| 1088 | my $self = shift (@_);
|
|---|
| 1089 | my ($textref, $doc_obj, $thissection) = @_;
|
|---|
| 1090 |
|
|---|
| 1091 | foreach my $size (split /,/, $self->{'first'}) {
|
|---|
| 1092 | my $tmptext = $$textref;
|
|---|
| 1093 | $tmptext =~ s/^\s+//;
|
|---|
| 1094 | $tmptext =~ s/\s+$//;
|
|---|
| 1095 | $tmptext =~ s/\s+/ /gs;
|
|---|
| 1096 | $tmptext = substr ($tmptext, 0, $size);
|
|---|
| 1097 | $tmptext =~ s/\s\S*$/…/;
|
|---|
| 1098 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
|---|
| 1099 | }
|
|---|
| 1100 | }
|
|---|
| 1101 |
|
|---|
| 1102 | sub extract_email {
|
|---|
| 1103 | my $self = shift (@_);
|
|---|
| 1104 | my ($textref, $doc_obj, $thissection) = @_;
|
|---|
| 1105 | my $outhandle = $self->{'outhandle'};
|
|---|
| 1106 |
|
|---|
| 1107 | gsprintf($outhandle, " {BasPlug.extracting_emails}...\n")
|
|---|
| 1108 | if ($self->{'verbosity'} > 2);
|
|---|
| 1109 |
|
|---|
| 1110 | my @email = ($$textref =~ m/([-a-z0-9\.@+_=]+@(?:[-a-z0-9]+\.)+(?:com|org|edu|mil|int|net|[a-z][a-z]))/g);
|
|---|
| 1111 | @email = sort @email;
|
|---|
| 1112 |
|
|---|
| 1113 | my @email2 = ();
|
|---|
| 1114 | foreach my $address (@email) {
|
|---|
| 1115 | if (!(join(" ",@email2) =~ m/$address/ )) {
|
|---|
| 1116 | push @email2, $address;
|
|---|
| 1117 | $doc_obj->add_utf8_metadata ($thissection, "emailAddress", $address);
|
|---|
| 1118 | gsprintf($outhandle, " {BasPlug.extracting} $address\n")
|
|---|
| 1119 | if ($self->{'verbosity'} > 3);
|
|---|
| 1120 | }
|
|---|
| 1121 | }
|
|---|
| 1122 | gsprintf($outhandle, " {BasPlug.done_email_extract}\n")
|
|---|
| 1123 | if ($self->{'verbosity'} > 2);
|
|---|
| 1124 | }
|
|---|
| 1125 |
|
|---|
| 1126 | # extract metadata
|
|---|
| 1127 | sub auto_extract_metadata {
|
|---|
| 1128 |
|
|---|
| 1129 | my $self = shift (@_);
|
|---|
| 1130 | my ($doc_obj) = @_;
|
|---|
| 1131 |
|
|---|
| 1132 | if ($self->{'extract_email'}) {
|
|---|
| 1133 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1134 | while (defined $thissection) {
|
|---|
| 1135 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1136 | $self->extract_email (\$text, $doc_obj, $thissection) if $text =~ /./;
|
|---|
| 1137 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1138 | }
|
|---|
| 1139 | }
|
|---|
| 1140 | if ($self->{'extract_placenames'}) {
|
|---|
| 1141 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1142 | while (defined $thissection) {
|
|---|
| 1143 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1144 | $self->extract_placenames (\$text, $doc_obj, $thissection) if $text =~ /./;
|
|---|
| 1145 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1146 | }
|
|---|
| 1147 | }
|
|---|
| 1148 |
|
|---|
| 1149 | # adding kea keyphrases
|
|---|
| 1150 | if ($self->{'kea'}) {
|
|---|
| 1151 |
|
|---|
| 1152 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1153 | my $text = "";
|
|---|
| 1154 | my $list;
|
|---|
| 1155 |
|
|---|
| 1156 | #loop through sections to gather whole doc
|
|---|
| 1157 | while (defined $thissection) {
|
|---|
| 1158 | my $sectiontext = $doc_obj->get_text($thissection);
|
|---|
| 1159 | $text = $text.$sectiontext;
|
|---|
| 1160 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1161 | }
|
|---|
| 1162 |
|
|---|
| 1163 | if ($self->{'kea_options'}) {
|
|---|
| 1164 | #if kea options flag is set, call Kea with specified options
|
|---|
| 1165 | $list = &Kea::extract_KeyPhrases ($text, $self->{'kea_options'});
|
|---|
| 1166 | } else {
|
|---|
| 1167 | #otherwise call Kea with no options
|
|---|
| 1168 | $list = &Kea::extract_KeyPhrases ($text);
|
|---|
| 1169 | }
|
|---|
| 1170 | if ($list){
|
|---|
| 1171 | # if a list of kea keyphrases was returned (ie not empty)
|
|---|
| 1172 | if ($self->{'verbosity'}) {
|
|---|
| 1173 | gsprintf(STDERR, "{BasPlug.keyphrases}: $list\n");
|
|---|
| 1174 | }
|
|---|
| 1175 |
|
|---|
| 1176 | #add metadata to top section
|
|---|
| 1177 | $thissection = $doc_obj->get_top_section();
|
|---|
| 1178 |
|
|---|
| 1179 | # add all key phrases as one metadata
|
|---|
| 1180 | $doc_obj->add_metadata($thissection, "Keyphrases", $list);
|
|---|
| 1181 |
|
|---|
| 1182 | # add individual key phrases as multiple metadata
|
|---|
| 1183 | foreach my $keyphrase (split(',', $list)) {
|
|---|
| 1184 | $keyphrase =~ s/^\s+|\s+$//g;
|
|---|
| 1185 | $doc_obj->add_metadata($thissection, "Keyphrase", $keyphrase);
|
|---|
| 1186 | }
|
|---|
| 1187 | }
|
|---|
| 1188 | } #end of kea
|
|---|
| 1189 |
|
|---|
| 1190 | if ($self->{'first'}) {
|
|---|
| 1191 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1192 | while (defined $thissection) {
|
|---|
| 1193 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1194 | $self->extract_first_NNNN_characters (\$text, $doc_obj, $thissection) if $text =~ /./;
|
|---|
| 1195 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1196 | }
|
|---|
| 1197 | }
|
|---|
| 1198 |
|
|---|
| 1199 | if ($self->{'extract_acronyms'}) {
|
|---|
| 1200 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1201 | while (defined $thissection) {
|
|---|
| 1202 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1203 | $self->extract_acronyms (\$text, $doc_obj, $thissection) if $text =~ /./;
|
|---|
| 1204 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1205 | }
|
|---|
| 1206 | }
|
|---|
| 1207 |
|
|---|
| 1208 | if ($self->{'markup_acronyms'}) {
|
|---|
| 1209 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1210 | while (defined $thissection) {
|
|---|
| 1211 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1212 | $text = $self->markup_acronyms ($text, $doc_obj, $thissection);
|
|---|
| 1213 | $doc_obj->delete_text($thissection);
|
|---|
| 1214 | $doc_obj->add_text($thissection, $text);
|
|---|
| 1215 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1216 | }
|
|---|
| 1217 | }
|
|---|
| 1218 |
|
|---|
| 1219 | if($self->{'date_extract'}) {
|
|---|
| 1220 | my $thissection = $doc_obj->get_top_section();
|
|---|
| 1221 | while (defined $thissection) {
|
|---|
| 1222 |
|
|---|
| 1223 | my $text = $doc_obj->get_text($thissection);
|
|---|
| 1224 | &DateExtract::get_date_metadata($text, $doc_obj,
|
|---|
| 1225 | $thissection,
|
|---|
| 1226 | $self->{'no_biblio'},
|
|---|
| 1227 | $self->{'max_year'},
|
|---|
| 1228 | $self->{'max_century'});
|
|---|
| 1229 | $thissection = $doc_obj->get_next_section ($thissection);
|
|---|
| 1230 | }
|
|---|
| 1231 | }
|
|---|
| 1232 | }
|
|---|
| 1233 |
|
|---|
| 1234 | # extract acronyms from a section in a document. progress is
|
|---|
| 1235 | # reported to outhandle based on the verbosity. both the Acronym
|
|---|
| 1236 | # and the AcronymKWIC metadata items are created.
|
|---|
| 1237 |
|
|---|
| 1238 | sub extract_acronyms {
|
|---|
| 1239 | my $self = shift (@_);
|
|---|
| 1240 | my ($textref, $doc_obj, $thissection) = @_;
|
|---|
| 1241 | my $outhandle = $self->{'outhandle'};
|
|---|
| 1242 |
|
|---|
| 1243 | # print $outhandle " extracting acronyms ...\n"
|
|---|
| 1244 | gsprintf($outhandle, " {BasPlug.extracting_acronyms}...\n")
|
|---|
| 1245 | if ($self->{'verbosity'} > 2);
|
|---|
| 1246 |
|
|---|
| 1247 | my $acro_array = &acronym::acronyms($textref);
|
|---|
| 1248 |
|
|---|
| 1249 | foreach my $acro (@$acro_array) {
|
|---|
| 1250 |
|
|---|
| 1251 | #check that this is the first time ...
|
|---|
| 1252 | my $seen_before = "false";
|
|---|
| 1253 | my $previous_data = $doc_obj->get_metadata($thissection, "Acronym");
|
|---|
| 1254 | foreach my $thisAcro (@$previous_data) {
|
|---|
| 1255 | if ($thisAcro eq $acro->to_string()) {
|
|---|
| 1256 | $seen_before = "true";
|
|---|
| 1257 | if ($self->{'verbosity'} >= 4) {
|
|---|
| 1258 | gsprintf($outhandle, " {BasPlug.already_seen} " .
|
|---|
| 1259 | $acro->to_string() . "\n");
|
|---|
| 1260 | }
|
|---|
| 1261 | }
|
|---|
| 1262 | }
|
|---|
| 1263 |
|
|---|
| 1264 | if ($seen_before eq "false") {
|
|---|
| 1265 | #write it to the file ...
|
|---|
| 1266 | $acro->write_to_file();
|
|---|
| 1267 |
|
|---|
| 1268 | #do the normal acronym
|
|---|
| 1269 | $doc_obj->add_utf8_metadata($thissection, "Acronym", $acro->to_string());
|
|---|
| 1270 | gsprintf($outhandle, " {BasPlug.adding} ".$acro->to_string()."\n")
|
|---|
| 1271 | if ($self->{'verbosity'} > 3);
|
|---|
| 1272 | }
|
|---|
| 1273 | }
|
|---|
| 1274 |
|
|---|
| 1275 | gsprintf($outhandle, " {BasPlug.done_acronym_extract}\n")
|
|---|
| 1276 | if ($self->{'verbosity'} > 2);
|
|---|
| 1277 | }
|
|---|
| 1278 |
|
|---|
| 1279 | sub markup_acronyms {
|
|---|
| 1280 | my $self = shift (@_);
|
|---|
| 1281 | my ($text, $doc_obj, $thissection) = @_;
|
|---|
| 1282 | my $outhandle = $self->{'outhandle'};
|
|---|
| 1283 |
|
|---|
| 1284 | gsprintf($outhandle, " {BasPlug.marking_up_acronyms}...\n")
|
|---|
| 1285 | if ($self->{'verbosity'} > 2);
|
|---|
| 1286 |
|
|---|
| 1287 | #self is passed in to check for verbosity ...
|
|---|
| 1288 | $text = &acronym::markup_acronyms($text, $self);
|
|---|
| 1289 |
|
|---|
| 1290 | gsprintf($outhandle, " {BasPlug.done_acronym_markup}\n")
|
|---|
| 1291 | if ($self->{'verbosity'} > 2);
|
|---|
| 1292 |
|
|---|
| 1293 | return $text;
|
|---|
| 1294 | }
|
|---|
| 1295 |
|
|---|
| 1296 | sub compile_stats {
|
|---|
| 1297 | my $self = shift(@_);
|
|---|
| 1298 | my ($stats) = @_;
|
|---|
| 1299 |
|
|---|
| 1300 | $stats->{'num_processed'} += $self->{'num_processed'};
|
|---|
| 1301 | $stats->{'num_not_processed'} += $self->{'num_not_processed'};
|
|---|
| 1302 | $stats->{'num_archives'} += $self->{'num_archives'};
|
|---|
| 1303 |
|
|---|
| 1304 | }
|
|---|
| 1305 |
|
|---|
| 1306 | sub associate_cover_image {
|
|---|
| 1307 | my $self = shift(@_);
|
|---|
| 1308 | my ($doc_obj, $filename) = @_;
|
|---|
| 1309 |
|
|---|
| 1310 | my $top_section=$doc_obj->get_top_section();
|
|---|
| 1311 |
|
|---|
| 1312 | $filename =~ s/\.[^\\\/\.]+$/\.jpg/;
|
|---|
| 1313 | if (-e $filename) {
|
|---|
| 1314 | $doc_obj->associate_file($filename, "cover.jpg", "image/jpeg");
|
|---|
| 1315 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
|---|
| 1316 | } else {
|
|---|
| 1317 | $filename =~ s/jpg$/JPG/;
|
|---|
| 1318 | if (-e $filename) {
|
|---|
| 1319 | $doc_obj->associate_file($filename, "cover.jpg", "image/jpeg");
|
|---|
| 1320 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
|---|
| 1321 | }
|
|---|
| 1322 | }
|
|---|
| 1323 | }
|
|---|
| 1324 |
|
|---|
| 1325 | 1;
|
|---|
