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;
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39 | no strict 'subs';
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40 | no strict 'refs'; # allow filehandles to be variables and viceversa
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41 |
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42 | use File::Basename;
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43 |
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44 | use Kea;
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45 | use multiread;
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46 | use encodings;
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47 | use cnseg;
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48 | use acronym;
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49 | use textcat;
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50 | use doc;
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51 | eval "require diagnostics"; # some perl distros (eg mac) don't have this
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52 | use DateExtract;
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53 | use ghtml;
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54 | use gsprintf 'gsprintf';
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55 | use printusage;
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56 | use parse2;
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57 |
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58 |
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59 | use GISBasPlug;
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60 |
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61 | @BasPlug::ISA = ( GISBasPlug );
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62 |
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63 | my $unicode_list =
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64 | [ { 'name' => "ascii",
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65 | 'desc' => "{BasPlug.input_encoding.ascii}" },
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66 | { 'name' => "utf8",
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67 | 'desc' => "{BasPlug.input_encoding.utf8}" },
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68 | { 'name' => "unicode",
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69 | 'desc' => "{BasPlug.input_encoding.unicode}" } ];
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70 |
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71 | my $auto_unicode_list =
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72 | [ { 'name' => "auto",
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73 | 'desc' => "{BasPlug.input_encoding.auto}" } ];
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74 |
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75 | my $e = $encodings::encodings;
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76 | foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e))
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77 | {
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78 | my $hashEncode =
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79 | {'name' => $enc,
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80 | 'desc' => $e->{$enc}->{'name'}};
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81 |
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82 | push(@{$unicode_list},$hashEncode);
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83 | }
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84 |
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85 | push(@{$auto_unicode_list},@{$unicode_list});
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86 |
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87 | my $arguments =
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88 | [ { 'name' => "process_exp",
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89 | 'desc' => "{BasPlug.process_exp}",
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90 | 'type' => "regexp",
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91 | 'deft' => "",
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92 | 'reqd' => "no" },
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93 | { 'name' => "block_exp",
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94 | 'desc' => "{BasPlug.block_exp}",
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95 | 'type' => "regexp",
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96 | 'deft' => "",
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97 | 'reqd' => "no" },
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98 | { 'name' => "smart_block",
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99 | 'desc' => "{BasPlug.smart_block}",
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100 | 'type' => "flag",
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101 | 'reqd' => "no" },
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102 | { 'name' => "associate_ext",
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103 | 'desc' => "{BasPlug.associate_ext}",
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104 | 'type' => "string",
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105 | 'reqd' => "no" },
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106 | { 'name' => "input_encoding",
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107 | 'desc' => "{BasPlug.input_encoding}",
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108 | 'type' => "enum",
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109 | 'list' => $auto_unicode_list,
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110 | 'reqd' => "no" ,
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111 | 'deft' => "auto" } ,
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112 | { 'name' => "default_encoding",
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113 | 'desc' => "{BasPlug.default_encoding}",
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114 | 'type' => "enum",
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115 | 'list' => $unicode_list,
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116 | 'reqd' => "no",
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117 | 'deft' => "utf8" },
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118 | { 'name' => "extract_language",
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119 | 'desc' => "{BasPlug.extract_language}",
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120 | 'type' => "flag",
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121 | 'reqd' => "no" },
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122 | { 'name' => "default_language",
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123 | 'desc' => "{BasPlug.default_language}",
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124 | 'type' => "string",
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125 | 'deft' => "en",
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126 | 'reqd' => "no" },
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127 | { 'name' => "extract_acronyms",
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128 | 'desc' => "{BasPlug.extract_acronyms}",
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129 | 'type' => "flag",
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130 | 'reqd' => "no" },
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131 | { 'name' => "markup_acronyms",
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132 | 'desc' => "{BasPlug.markup_acronyms}",
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133 | 'type' => "flag",
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134 | 'reqd' => "no" },
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135 | { 'name' => "extract_keyphrases",
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136 | 'desc' => "{BasPlug.extract_keyphrases}",
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137 | 'type' => "flag",
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138 | 'reqd' => "no" },
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139 | { 'name' => "extract_keyphrase_options",
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140 | 'desc' => "{BasPlug.extract_keyphrase_options}",
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141 | 'type' => "string",
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142 | 'deft' => "",
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143 | 'reqd' => "no" },
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144 | { 'name' => "first",
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145 | 'desc' => "{BasPlug.first}",
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146 | 'type' => "string",
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147 | 'reqd' => "no" },
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148 | { 'name' => "extract_email",
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149 | 'desc' => "{BasPlug.extract_email}",
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150 | 'type' => "flag",
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151 | 'reqd' => "no" },
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152 | { 'name' => "extract_historical_years",
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153 | 'desc' => "{BasPlug.extract_historical_years}",
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154 | 'type' => "flag",
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155 | 'reqd' => "no" },
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156 | { 'name' => "maximum_year",
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157 | 'desc' => "{BasPlug.maximum_year}",
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158 | 'type' => "int",
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159 | 'deft' => (localtime)[5]+1900,
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160 | 'char_length' => "4",
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161 | #'range' => "2,100",
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162 | 'reqd' => "no"},
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163 | { 'name' => "maximum_century",
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164 | 'desc' => "{BasPlug.maximum_century}",
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165 | 'type' => "string",
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166 | 'deft' => "-1",
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167 | 'reqd' => "no" },
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168 | { 'name' => "no_bibliography",
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169 | 'desc' => "{BasPlug.no_bibliography}",
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170 | 'type' => "flag",
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171 | 'reqd' => "no"},
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172 | { 'name' => "no_cover_image",
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173 | 'desc' => "{BasPlug.no_cover_image}",
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174 | 'type' => "flag",
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175 | 'reqd' => "no" },
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176 | { 'name' => "extract_keyphrases",
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177 | 'desc' => "{BasPlug.extract_keyphrases}",
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178 | 'type' => "flag",
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179 | 'reqd' => "no",
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180 | 'hiddengli' => "yes" },
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181 | { 'name' => "extract_keyphrase_options",
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182 | 'desc' => "{BasPlug.extract_keyphrase_options}",
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183 | 'type' => "string",
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184 | 'reqd' => "no",
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185 | 'hiddengli' => "yes" },
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186 | { 'name' => "separate_cjk",
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187 | 'desc' => "{BasPlug.separate_cjk}",
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188 | 'type' => "flag",
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189 | 'reqd' => "no",
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190 | 'hiddengli' => "yes" },
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191 | { 'name' => "smart_block",
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192 | 'desc' => "{BasPlug.smart_block}",
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193 | 'type' => "flag",
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194 | 'reqd' => "no",
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195 | 'hiddengli' => "yes" },
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196 | { 'name' => "new_extract_email",
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197 | 'desc' => "",
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198 | 'type' => "flag",
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199 | 'reqd' => "no",
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200 | 'hiddengli' => "yes" } ];
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201 |
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202 | my $gis_arguments =
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203 | [ { 'name' => "extract_placenames",
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204 | 'desc' => "{GISBasPlug.extract_placenames}",
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205 | 'type' => "flag",
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206 | 'reqd' => "no" },
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207 | { 'name' => "gazetteer",
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208 | 'desc' => "{GISBasPlug.gazetteer}",
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209 | 'type' => "string",
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210 | 'reqd' => "no" },
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211 | { 'name' => "place_list",
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212 | 'desc' => "{GISBasPlug.place_list}",
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213 | 'type' => "flag",
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214 | 'reqd' => "no" } ];
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215 |
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216 |
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217 | my $options = { 'name' => "BasPlug",
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218 | 'desc' => "{BasPlug.desc}",
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219 | 'abstract' => "yes",
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220 | 'inherits' => "no",
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221 | 'args' => $arguments };
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222 |
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223 |
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224 | sub set_keepold {
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225 | my $self = shift(@_);
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226 | my ($keepold) = @_;
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227 |
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228 | $self->{'keepold'} = $keepold;
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229 | }
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230 |
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231 | sub get_arguments
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232 | {
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233 | my $self = shift(@_);
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234 | my $optionlistref = $self->{'option_list'};
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235 | my @optionlist = @$optionlistref;
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236 | my $pluginoptions = pop(@$optionlistref);
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237 | my $pluginarguments = $pluginoptions->{'args'};
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238 | return $pluginarguments;
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239 | }
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240 |
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241 |
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242 | sub print_xml_usage
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243 | {
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244 | my $self = shift(@_);
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245 |
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246 | # XML output is always in UTF-8
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247 | gsprintf::output_strings_in_UTF8;
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248 |
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249 | PrintUsage::print_xml_header();
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250 | $self->print_xml();
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251 | }
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252 |
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253 |
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254 | sub print_xml
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255 | {
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256 | my $self = shift(@_);
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257 |
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258 | my $optionlistref = $self->{'option_list'};
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259 | my @optionlist = @$optionlistref;
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260 | my $pluginoptions = shift(@$optionlistref);
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261 | return if (!defined($pluginoptions));
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262 |
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263 | gsprintf(STDERR, "<PlugInfo>\n");
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264 | gsprintf(STDERR, " <Name>$pluginoptions->{'name'}</Name>\n");
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265 | my $desc = gsprintf::lookup_string($pluginoptions->{'desc'});
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266 | $desc =~ s/</&lt;/g; # doubly escaped
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267 | $desc =~ s/>/&gt;/g;
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268 |
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269 | gsprintf(STDERR, " <Desc>$desc</Desc>\n");
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270 | gsprintf(STDERR, " <Abstract>$pluginoptions->{'abstract'}</Abstract>\n");
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271 | gsprintf(STDERR, " <Inherits>$pluginoptions->{'inherits'}</Inherits>\n");
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272 | gsprintf(STDERR, " <Explodes>" . ($pluginoptions->{'explodes'} || "no") . "</Explodes>\n");
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273 | gsprintf(STDERR, " <Arguments>\n");
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274 | if (defined($pluginoptions->{'args'})) {
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275 | &PrintUsage::print_options_xml($pluginoptions->{'args'});
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276 | }
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277 |
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278 | # Recurse up the plugin hierarchy
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279 | $self->print_xml();
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280 |
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281 | gsprintf(STDERR, " </Arguments>\n");
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282 | gsprintf(STDERR, "</PlugInfo>\n");
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283 | }
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284 |
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285 |
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286 | sub print_txt_usage
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287 | {
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288 | my $self = shift(@_);
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289 | # Print the usage message for a plugin (recursively)
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290 | my $descoffset = $self->determine_description_offset(0);
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291 | $self->print_plugin_usage($descoffset, 1);
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292 | }
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293 |
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294 |
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295 | sub determine_description_offset
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296 | {
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297 | my $self = shift(@_);
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298 | my $maxoffset = shift(@_);
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299 |
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300 | my $optionlistref = $self->{'option_list'};
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301 | my @optionlist = @$optionlistref;
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302 | my $pluginoptions = shift(@$optionlistref);
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303 | return $maxoffset if (!defined($pluginoptions));
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304 |
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305 | # Find the length of the longest option string of this plugin
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306 | my $pluginargs = $pluginoptions->{'args'};
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307 | if (defined($pluginargs)) {
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308 | my $longest = &PrintUsage::find_longest_option_string($pluginargs);
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309 | if ($longest > $maxoffset) {
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310 | $maxoffset = $longest;
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311 | }
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312 | }
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313 |
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314 | # Recurse up the plugin hierarchy
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315 | $maxoffset = $self->determine_description_offset($maxoffset);
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316 | $self->{'option_list'} = \@optionlist;
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317 | return $maxoffset;
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318 | }
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319 |
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320 |
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321 | sub print_plugin_usage
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322 | {
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323 | my $self = shift(@_);
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324 | my $descoffset = shift(@_);
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325 | my $isleafclass = shift(@_);
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326 |
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327 | my $optionlistref = $self->{'option_list'};
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328 | my @optionlist = @$optionlistref;
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329 | my $pluginoptions = shift(@$optionlistref);
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330 | return if (!defined($pluginoptions));
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331 |
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332 | my $pluginname = $pluginoptions->{'name'};
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333 | my $pluginargs = $pluginoptions->{'args'};
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334 | my $plugindesc = $pluginoptions->{'desc'};
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335 |
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336 | # Produce the usage information using the data structure above
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337 | if ($isleafclass) {
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338 | if (defined($plugindesc)) {
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339 | gsprintf(STDERR, "$plugindesc\n\n");
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340 | }
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341 | gsprintf(STDERR, " {common.usage}: plugin $pluginname [{common.options}]\n\n");
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342 | }
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343 |
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344 | # Display the plugin options, if there are some
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345 | if (defined($pluginargs)) {
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346 | # Calculate the column offset of the option descriptions
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347 | my $optiondescoffset = $descoffset + 2; # 2 spaces between options & descriptions
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348 |
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349 | if ($isleafclass) {
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350 | gsprintf(STDERR, " {common.specific_options}:\n");
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351 | }
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352 | else {
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353 | gsprintf(STDERR, " {common.general_options}:\n", $pluginname);
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354 | }
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355 |
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356 | # Display the plugin options
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357 | &PrintUsage::print_options_txt($pluginargs, $optiondescoffset);
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358 | }
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359 |
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360 | # Recurse up the plugin hierarchy
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361 | $self->print_plugin_usage($descoffset, 0);
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362 | $self->{'option_list'} = \@optionlist;
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363 | }
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364 |
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365 |
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366 | sub new {
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367 | # Set Encodings to the list!!
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368 |
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369 |
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370 | # Start the BasPlug Constructor
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371 | my $class = shift (@_);
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372 | my ($pluginlist,$args,$hashArgOptLists) = @_;
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373 | push(@$pluginlist, $class);
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374 | my $plugin_name = (defined $pluginlist->[0]) ? $pluginlist->[0] : $class;
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375 |
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376 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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377 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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378 |
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379 | if (GISBasPlug::has_mapdata()) {
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380 | push(@$arguments,@$gis_arguments);
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381 | }
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382 |
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383 | my $self = {};
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384 | $self->{'outhandle'} = STDERR;
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385 | $self->{'option_list'} = $hashArgOptLists->{"OptList"};
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386 | $self->{"info_only"} = 0;
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387 |
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388 | # Check if gsdlinfo is in the argument list or not - if it is, don't parse
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389 | # the args, just return the object.
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390 | foreach my $strArg (@{$args})
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391 | {
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392 | if($strArg eq "-gsdlinfo")
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393 | {
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394 | $self->{"info_only"} = 1;
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395 | return bless $self, $class;
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396 | }
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397 | }
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398 |
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399 | if(!parse2::parse($args,$hashArgOptLists->{"ArgList"},$self))
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400 | {
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401 | my $classTempClass = bless $self, $class;
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402 | print STDERR "<BadPlugin p=$plugin_name>\n";
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403 | &gsprintf(STDERR, "\n{BasPlug.bad_general_option}\n", $plugin_name);
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404 | $classTempClass->print_txt_usage(""); # Use default resource bundle
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405 | die "\n";
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406 | }
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407 |
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408 |
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409 | delete $self->{"info_only"};
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410 | # else parsing was successful.
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411 |
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412 | $self->{'plugin_type'} = $plugin_name;
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413 | #$self->{'outhandle'} = STDERR;
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414 | $self->{'textcat'} = new textcat();
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415 | $self->{'num_processed'} = 0;
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416 | $self->{'num_not_processed'} = 0;
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417 | $self->{'num_blocked'} = 0;
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418 | $self->{'num_archives'} = 0;
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419 | $self->{'cover_image'} = 1; # cover image is on by default
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420 | $self->{'cover_image'} = 0 if ($self->{'no_cover_image'});
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421 | $self->{'file_blocks'} = {};
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422 | #$self->{'option_list'} = $hashArgOptLists->{"OptList"};
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423 |
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424 | my $associate_ext = $self->{'associate_ext'};
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425 | if ((defined $associate_ext) && ($associate_ext ne "")) {
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426 | my @exts = split(/,/,$associate_ext);
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427 |
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428 | my %associate_ext_lookup = ();
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429 | foreach my $e (@exts) {
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430 | $associate_ext_lookup{$e} = 1;
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431 | }
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432 |
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433 | $self->{'associate_ext_lookup'} = \%associate_ext_lookup;
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434 | }
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435 |
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436 | $self->{'shared_fileroot'} = {};
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437 | $self->{'file_blocks'} = {};
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438 |
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439 | if ($self->{'extract_placenames'}) {
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440 |
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441 | my $outhandle = $self->{'outhandle'};
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442 |
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443 | my $places_ref
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444 | = GISBasPlug::loadGISDatabase($outhandle,$self->{'gazetteer'});
|
---|
445 |
|
---|
446 | if (!defined $places_ref) {
|
---|
447 | print $outhandle "Warning: Error loading mapdata gazetteer \"$self->{'gazetteer'}\"\n";
|
---|
448 | print $outhandle " No placename extraction will take place.\n";
|
---|
449 | $self->{'extract_placenames'} = undef;
|
---|
450 | }
|
---|
451 | else {
|
---|
452 | $self->{'places'} = $places_ref;
|
---|
453 | }
|
---|
454 | }
|
---|
455 | return bless $self, $class;
|
---|
456 |
|
---|
457 | }
|
---|
458 |
|
---|
459 | # initialize BasPlug options
|
---|
460 | # if init() is overridden in a sub-class, remember to call BasPlug::init()
|
---|
461 | sub init {
|
---|
462 | my $self = shift (@_);
|
---|
463 | my ($verbosity, $outhandle, $failhandle) = @_;
|
---|
464 |
|
---|
465 | # verbosity is passed through from the processor
|
---|
466 | $self->{'verbosity'} = $verbosity;
|
---|
467 |
|
---|
468 | # as are the outhandle and failhandle
|
---|
469 | $self->{'outhandle'} = $outhandle if defined $outhandle;
|
---|
470 | $self->{'failhandle'} = $failhandle;
|
---|
471 |
|
---|
472 | # set process_exp and block_exp to defaults unless they were
|
---|
473 | # explicitly set
|
---|
474 |
|
---|
475 | if ((!$self->is_recursive()) and
|
---|
476 | (!defined $self->{'process_exp'}) || ($self->{'process_exp'} eq "")) {
|
---|
477 |
|
---|
478 | $self->{'process_exp'} = $self->get_default_process_exp ();
|
---|
479 | if ($self->{'process_exp'} eq "") {
|
---|
480 | warn ref($self) . " Warning: Non-recursive plugin has no process_exp\n";
|
---|
481 | }
|
---|
482 | }
|
---|
483 |
|
---|
484 | if ((!defined $self->{'block_exp'}) || ($self->{'block_exp'} eq "")) {
|
---|
485 | $self->{'block_exp'} = $self->get_default_block_exp ();
|
---|
486 | }
|
---|
487 | }
|
---|
488 |
|
---|
489 | sub begin {
|
---|
490 | my $self = shift (@_);
|
---|
491 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
|
---|
492 | $self->initialise_extractors();
|
---|
493 | }
|
---|
494 |
|
---|
495 | sub end {
|
---|
496 | # potentially called at the end of each plugin pass
|
---|
497 | # import.pl only has one plugin pass, but buildcol.pl has multiple ones
|
---|
498 |
|
---|
499 | my ($self) = @_;
|
---|
500 | $self->finalise_extractors();
|
---|
501 | }
|
---|
502 |
|
---|
503 | sub deinit {
|
---|
504 | # called only once, after all plugin passes have been done
|
---|
505 |
|
---|
506 | my ($self) = @_;
|
---|
507 | }
|
---|
508 |
|
---|
509 | # this function should be overridden to return 1
|
---|
510 | # in recursive plugins
|
---|
511 | sub is_recursive {
|
---|
512 | my $self = shift (@_);
|
---|
513 |
|
---|
514 | return 0;
|
---|
515 | }
|
---|
516 |
|
---|
517 | sub get_default_block_exp {
|
---|
518 | my $self = shift (@_);
|
---|
519 |
|
---|
520 | return "";
|
---|
521 | }
|
---|
522 |
|
---|
523 | sub get_default_process_exp {
|
---|
524 | my $self = shift (@_);
|
---|
525 |
|
---|
526 | return "";
|
---|
527 | }
|
---|
528 |
|
---|
529 | # default implementation is to do nothing.
|
---|
530 | sub store_block_files
|
---|
531 | {
|
---|
532 | my $self =shift (@_);
|
---|
533 | my ($filename) = @_;
|
---|
534 | return;
|
---|
535 | }
|
---|
536 |
|
---|
537 | #default implementation is to block a file with same name as this, but extension jpg or JPG, if cover_images is on.
|
---|
538 | sub block_cover_image
|
---|
539 | {
|
---|
540 | my $self =shift;
|
---|
541 | my $filename = shift;
|
---|
542 |
|
---|
543 | if (exists $self->{'file_blocks'}->{$filename}) {
|
---|
544 | # we've already checked if this file exists, so don't stat() again.
|
---|
545 | # (eg for multi-sectioned files using SplitPlug)
|
---|
546 | return;
|
---|
547 | }
|
---|
548 |
|
---|
549 | if ($self->{'cover_image'}) {
|
---|
550 | my $coverfile = $filename;
|
---|
551 | $coverfile =~ s/\.[^\\\/\.]+$/\.jpg/;
|
---|
552 | if (!-e $coverfile) {
|
---|
553 | $coverfile =~ s/jpg$/JPG/;
|
---|
554 | }
|
---|
555 | if (-e $coverfile) {
|
---|
556 | $self->{'file_blocks'}->{$coverfile} = 1;
|
---|
557 | } else {
|
---|
558 | $self->{'file_blocks'}->{$coverfile} = 0;
|
---|
559 | }
|
---|
560 | }
|
---|
561 |
|
---|
562 | return;
|
---|
563 | }
|
---|
564 |
|
---|
565 | sub metadata_read {
|
---|
566 | my $self = shift (@_);
|
---|
567 | my ($pluginfo, $base_dir, $file, $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
|
---|
568 | # Keep track of filenames with same root but different extensions
|
---|
569 | # Used to support -associate_ext
|
---|
570 |
|
---|
571 | my $associate_ext = $self->{'associate_ext'};
|
---|
572 | if ((defined $associate_ext) && ($associate_ext ne "")) {
|
---|
573 |
|
---|
574 | my ($file_prefix,$file_ext) = ($file =~ m/^(.*)\.(.*?)$/);
|
---|
575 | if ((defined $file_prefix) && (defined $file_ext)) {
|
---|
576 |
|
---|
577 | my $shared_fileroot = $self->{'shared_fileroot'};
|
---|
578 | if (!defined $shared_fileroot->{$file_prefix}) {
|
---|
579 | my $file_prefix_rec = { 'tie_to' => undef, 'exts' => {} };
|
---|
580 | $shared_fileroot->{$file_prefix} = $file_prefix_rec;
|
---|
581 | }
|
---|
582 |
|
---|
583 | my $file_prefix_rec = $shared_fileroot->{$file_prefix};
|
---|
584 |
|
---|
585 | my $process_exp = $self->{'process_exp'};
|
---|
586 |
|
---|
587 | if ($file =~ m/$self->{'process_exp'}/) {
|
---|
588 | # This is the document the others should be tied to
|
---|
589 | $file_prefix_rec->{'tie_to'} = $file_ext;
|
---|
590 | }
|
---|
591 | else {
|
---|
592 | if (defined $self->{'associate_ext_lookup'}->{$file_ext}) {
|
---|
593 | $file_prefix_rec->{'exts'}->{$file_ext} = 1;
|
---|
594 | }
|
---|
595 | }
|
---|
596 | }
|
---|
597 | }
|
---|
598 |
|
---|
599 | # now check whether we are actually processing this
|
---|
600 | my $filename = $file;
|
---|
601 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
---|
602 | if ($self->{'process_exp'} eq "" || $filename !~ /$self->{'process_exp'}/ || !-f $filename) {
|
---|
603 | return undef; # can't recognise
|
---|
604 | }
|
---|
605 |
|
---|
606 | # do smart blocking if appropriate
|
---|
607 | if (defined $self->{'smart_block'}) {
|
---|
608 | $self->block_cover_image($filename);
|
---|
609 | $self->store_block_files($filename);
|
---|
610 | }
|
---|
611 |
|
---|
612 | return 1;
|
---|
613 | }
|
---|
614 |
|
---|
615 | sub tie_to_filename
|
---|
616 | {
|
---|
617 | my $self = shift (@_);
|
---|
618 |
|
---|
619 | my ($file_ext,$file_prefix_rec) = @_;
|
---|
620 |
|
---|
621 | if (defined $file_prefix_rec) {
|
---|
622 | my $tie_to = $file_prefix_rec->{'tie_to'};
|
---|
623 |
|
---|
624 | if (defined $tie_to) {
|
---|
625 | if ($tie_to eq $file_ext) {
|
---|
626 | return 1;
|
---|
627 | }
|
---|
628 | }
|
---|
629 | }
|
---|
630 |
|
---|
631 | return 0;
|
---|
632 | }
|
---|
633 |
|
---|
634 | sub tie_to_assoc_file
|
---|
635 | {
|
---|
636 | my $self = shift (@_);
|
---|
637 | my ($file_ext,$file_prefix_rec) = @_;
|
---|
638 |
|
---|
639 | if (defined $file_prefix_rec) {
|
---|
640 | my $tie_to = $file_prefix_rec->{'tie_to'};
|
---|
641 | if (defined $tie_to) {
|
---|
642 |
|
---|
643 | my $exts = $file_prefix_rec->{'exts'};
|
---|
644 |
|
---|
645 | my $has_file_ext = $exts->{$file_ext};
|
---|
646 |
|
---|
647 | if ($has_file_ext) {
|
---|
648 | return 1;
|
---|
649 | }
|
---|
650 | }
|
---|
651 | }
|
---|
652 |
|
---|
653 | return 0;
|
---|
654 | }
|
---|
655 |
|
---|
656 |
|
---|
657 | sub associate_with
|
---|
658 | {
|
---|
659 | my $self = shift (@_);
|
---|
660 | my ($file, $filename, $metadata) = @_;
|
---|
661 |
|
---|
662 | my $associate_ext = $self->{'associate_ext'};
|
---|
663 |
|
---|
664 |
|
---|
665 | return 0 if (!$associate_ext);
|
---|
666 |
|
---|
667 | # If file, see if matches with "tie_to" doc or is one of the
|
---|
668 | # associated filename extensions.
|
---|
669 |
|
---|
670 | my ($file_prefix,$file_ext) = ($file =~ m/^(.*)\.(.*?)$/);
|
---|
671 | if ((defined $file_prefix) && (defined $file_ext)) {
|
---|
672 |
|
---|
673 | my $file_prefix_rec = $self->{'shared_fileroot'}->{$file_prefix};
|
---|
674 |
|
---|
675 | if ($self->tie_to_filename($file_ext,$file_prefix_rec)) {
|
---|
676 |
|
---|
677 | # Set up gsdlassocfile_tobe
|
---|
678 |
|
---|
679 | my $exts = $file_prefix_rec->{'exts'};
|
---|
680 |
|
---|
681 | if (!defined $metadata->{'gsdlassocfile_tobe'}) {
|
---|
682 | $metadata->{'gsdlassocfile_tobe'} = [];
|
---|
683 | }
|
---|
684 |
|
---|
685 | my $assoc_tobe = $metadata->{'gsdlassocfile_tobe'};
|
---|
686 |
|
---|
687 | my ($full_prefix) = ($filename =~ m/^(.*)\..*?$/);
|
---|
688 | foreach my $e (keys %$exts) {
|
---|
689 | my $assoc_file = "$full_prefix.$e";
|
---|
690 | my $mime_type = ""; # let system auto detect this
|
---|
691 | push(@$assoc_tobe,"$assoc_file:$mime_type:");
|
---|
692 | }
|
---|
693 | }
|
---|
694 | elsif ($self->tie_to_assoc_file($file_ext,$file_prefix_rec)) {
|
---|
695 | # a form of smart block
|
---|
696 |
|
---|
697 | return 1;
|
---|
698 | }
|
---|
699 | }
|
---|
700 |
|
---|
701 | return 0;
|
---|
702 | }
|
---|
703 |
|
---|
704 |
|
---|
705 | sub read_block {
|
---|
706 | my $self = shift (@_);
|
---|
707 |
|
---|
708 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
709 |
|
---|
710 |
|
---|
711 | my $filename = $file;
|
---|
712 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
---|
713 |
|
---|
714 | if ($self->associate_with($file,$filename,$metadata)) {
|
---|
715 | # a form of smart block
|
---|
716 | $self->{'num_blocked'} ++;
|
---|
717 | return (0,undef); # blocked
|
---|
718 | }
|
---|
719 |
|
---|
720 | my $smart_block = $self->{'smart_block'};
|
---|
721 | my $smart_block_BN = $self->{'smart_block_BN'};
|
---|
722 |
|
---|
723 | if ($smart_block || $smart_block_BN) {
|
---|
724 | if (defined $self->{'file_blocks'}->{$filename} && $self->{'file_blocks'}->{$filename} == 1){
|
---|
725 | $self->{'num_blocked'} ++;
|
---|
726 | return (0,undef); # blocked
|
---|
727 | }
|
---|
728 | } elsif ($self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/) {
|
---|
729 | $self->{'num_blocked'} ++;
|
---|
730 | return (0,undef); # blocked
|
---|
731 | }
|
---|
732 |
|
---|
733 | if ($filename !~ /$self->{'process_exp'}/ || !-f $filename) {
|
---|
734 | return (undef,undef); # can't recognise
|
---|
735 | }
|
---|
736 |
|
---|
737 | return (1,$filename);
|
---|
738 | }
|
---|
739 |
|
---|
740 | sub read_tidy_file {
|
---|
741 |
|
---|
742 | my $self = shift (@_);
|
---|
743 |
|
---|
744 | my ($file) = @_;
|
---|
745 |
|
---|
746 | $file =~ s/^[\/\\]+//; # $file often begins with / so we'll tidy it up
|
---|
747 |
|
---|
748 | return $file;
|
---|
749 | }
|
---|
750 |
|
---|
751 |
|
---|
752 |
|
---|
753 | # The BasPlug read_into_doc_obj() function. This function does all the
|
---|
754 | # right things to make general options work for a given plugin. It reads in
|
---|
755 | # a file and sets up a slew of metadata all saved in doc_obj, which
|
---|
756 | # it then returns as part of a tuple (process_status,doc_obj)
|
---|
757 | #
|
---|
758 | # Much of this functionality used to reside in read, but it was broken
|
---|
759 | # down into a supporting routine to make the code more flexible.
|
---|
760 | #
|
---|
761 | # recursive plugins (e.g. RecPlug) and specialized plugins like those
|
---|
762 | # capable of processing many documents within a single file (e.g.
|
---|
763 | # GMLPlug) will normally want to implement their own version of
|
---|
764 | # read_into_doc_obj()
|
---|
765 | #
|
---|
766 | # Note that $base_dir might be "" and that $file might
|
---|
767 | # include directories
|
---|
768 | sub read_into_doc_obj {
|
---|
769 | my $self = shift (@_);
|
---|
770 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
771 |
|
---|
772 | if ($self->is_recursive()) {
|
---|
773 | gsprintf(STDERR, "{BasPlug.read_must_be_implemented}") && die "\n";
|
---|
774 | }
|
---|
775 |
|
---|
776 | my $outhandle = $self->{'outhandle'};
|
---|
777 |
|
---|
778 | my ($block_status,$filename) = $self->read_block(@_);
|
---|
779 | return $block_status if ((!defined $block_status) || ($block_status==0));
|
---|
780 | $file = $self->read_tidy_file($file);
|
---|
781 |
|
---|
782 | # Do encoding stuff
|
---|
783 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
|
---|
784 |
|
---|
785 | # create a new document
|
---|
786 | my $doc_obj = new doc ($filename, "indexed_doc");
|
---|
787 | $doc_obj->set_OIDtype ($processor->{'OIDtype'});
|
---|
788 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Language", $language);
|
---|
789 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Encoding", $encoding);
|
---|
790 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
|
---|
791 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "FileSize", (-s $filename));
|
---|
792 |
|
---|
793 | my ($filemeta) = $file =~ /([^\\\/]+)$/;
|
---|
794 | # how do we know what encoding the filename is in?
|
---|
795 | $doc_obj->add_metadata($doc_obj->get_top_section(), "Source", &ghtml::dmsafe($filemeta));
|
---|
796 | if ($self->{'cover_image'}) {
|
---|
797 | $self->associate_cover_image($doc_obj, $filename);
|
---|
798 | }
|
---|
799 |
|
---|
800 | # read in file ($text will be in utf8)
|
---|
801 | my $text = "";
|
---|
802 | $self->read_file ($filename, $encoding, $language, \$text);
|
---|
803 |
|
---|
804 | if (!length ($text)) {
|
---|
805 | my $plugin_name = ref ($self);
|
---|
806 | if ($gli) {
|
---|
807 | print STDERR "<ProcessingError n='$file' r='File contains no text'>\n";
|
---|
808 | }
|
---|
809 | gsprintf($outhandle, "$plugin_name: {BasPlug.file_has_no_text}\n", $filename) if $self->{'verbosity'};
|
---|
810 |
|
---|
811 | my $failhandle = $self->{'failhandle'};
|
---|
812 | gsprintf($failhandle, "$file: " . ref($self) . ": {BasPlug.empty_file}\n");
|
---|
813 | # print $failhandle "$file: " . ref($self) . ": file contains no text\n";
|
---|
814 | $self->{'num_not_processed'} ++;
|
---|
815 |
|
---|
816 | return (0,undef); # what should we return here?? error but don't want to pass it on
|
---|
817 | }
|
---|
818 |
|
---|
819 | # include any metadata passed in from previous plugins
|
---|
820 | # note that this metadata is associated with the top level section
|
---|
821 |
|
---|
822 | $self->extra_metadata ($doc_obj, $doc_obj->get_top_section(), $metadata);
|
---|
823 |
|
---|
824 | # do plugin specific processing of doc_obj
|
---|
825 | unless (defined ($self->process (\$text, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
|
---|
826 | $text = '';
|
---|
827 | undef $text;
|
---|
828 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
---|
829 | return (-1,undef);
|
---|
830 | }
|
---|
831 | $text='';
|
---|
832 | undef $text;
|
---|
833 |
|
---|
834 | # do any automatic metadata extraction
|
---|
835 | $self->auto_extract_metadata ($doc_obj);
|
---|
836 |
|
---|
837 | # add an OID
|
---|
838 | # see if there is a plugin-specific set_OID function...
|
---|
839 | if (defined ($self->can('set_OID'))) {
|
---|
840 | # it will need $doc_obj to set the Identifier metadata...
|
---|
841 | $self->set_OID($doc_obj);
|
---|
842 | } else {
|
---|
843 | # use the default set_OID() in doc.pm
|
---|
844 | $doc_obj->set_OID();
|
---|
845 | }
|
---|
846 |
|
---|
847 | return (1,$doc_obj);
|
---|
848 | }
|
---|
849 |
|
---|
850 |
|
---|
851 | # The BasPlug read() function. This function calls read_into_doc_obj()
|
---|
852 | # to ensure all the right things to make general options work for a
|
---|
853 | # given plugin are done. It then calls the process() function which
|
---|
854 | # does all the work specific to a plugin (like the old read functions
|
---|
855 | # used to do). Most plugins should define their own process() function
|
---|
856 | # and let this read() function keep control.
|
---|
857 | #
|
---|
858 | # recursive plugins (e.g. RecPlug) and specialized plugins like those
|
---|
859 | # capable of processing many documents within a single file (e.g.
|
---|
860 | # GMLPlug) might want to implement their own version of read(), but
|
---|
861 | # more likely need to implement their own version of read_into_doc_obj()
|
---|
862 | #
|
---|
863 | # Return number of files processed, undef if can't recognise, -1 if can't
|
---|
864 | # process
|
---|
865 |
|
---|
866 | sub read {
|
---|
867 | my $self = shift (@_);
|
---|
868 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
869 |
|
---|
870 | my ($process_status,$doc_obj) = $self->read_into_doc_obj(@_);
|
---|
871 |
|
---|
872 | if ((defined $process_status) && ($process_status == 1)) {
|
---|
873 | # process the document
|
---|
874 | $processor->process($doc_obj);
|
---|
875 |
|
---|
876 | if(defined($self->{'places_filename'})){
|
---|
877 | &util::rm($self->{'places_filename'});
|
---|
878 | $self->{'places_filename'} = undef;
|
---|
879 | }
|
---|
880 |
|
---|
881 | $self->{'num_processed'} ++;
|
---|
882 | undef $doc_obj;
|
---|
883 | }
|
---|
884 |
|
---|
885 | # if process_status == 1, then the file has been processed.
|
---|
886 | return $process_status;
|
---|
887 |
|
---|
888 | }
|
---|
889 |
|
---|
890 | # returns undef if file is rejected by the plugin
|
---|
891 | sub process {
|
---|
892 | my $self = shift (@_);
|
---|
893 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
|
---|
894 |
|
---|
895 | gsprintf(STDERR, "BasPlug::process {common.must_be_implemented}\n") && die "\n";
|
---|
896 | # die "Basplug::process function must be implemented in sub-class\n";
|
---|
897 |
|
---|
898 | return undef; # never gets here
|
---|
899 | }
|
---|
900 |
|
---|
901 | # uses the multiread package to read in the entire file pointed to
|
---|
902 | # by filename and loads the resulting text into $$textref. Input text
|
---|
903 | # may be in any of the encodings handled by multiread, output text
|
---|
904 | # will be in utf8
|
---|
905 | sub read_file {
|
---|
906 | my $self = shift (@_);
|
---|
907 | my ($filename, $encoding, $language, $textref) = @_;
|
---|
908 |
|
---|
909 | if (!-r $filename)
|
---|
910 | {
|
---|
911 | my $outhandle = $self->{'outhandle'};
|
---|
912 | gsprintf($outhandle, "{BasPlug.read_denied}\n", $filename) if $self->{'verbosity'};
|
---|
913 | # print $outhandle "Read permission denied for $filename\n" if $self->{'verbosity'};
|
---|
914 | return;
|
---|
915 | }
|
---|
916 | $$textref = "";
|
---|
917 | if (!open (FILE, $filename)) {
|
---|
918 | gsprintf(STDERR, "BasPlug::read_file {BasPlug.could_not_open_for_reading} ($!)\n", $filename);
|
---|
919 | die "\n";
|
---|
920 | }
|
---|
921 |
|
---|
922 | if ($encoding eq "ascii") {
|
---|
923 | undef $/;
|
---|
924 | $$textref = <FILE>;
|
---|
925 | $/ = "\n";
|
---|
926 | } else {
|
---|
927 | my $reader = new multiread();
|
---|
928 | $reader->set_handle ('BasPlug::FILE');
|
---|
929 | $reader->set_encoding ($encoding);
|
---|
930 | $reader->read_file ($textref);
|
---|
931 | #Now segments chinese if the separate_cjk option is set
|
---|
932 | if ($self->{'separate_cjk'}) {
|
---|
933 | # segment the Chinese words
|
---|
934 | $$textref = &cnseg::segment($$textref);
|
---|
935 | }
|
---|
936 | }
|
---|
937 | close FILE;
|
---|
938 | }
|
---|
939 |
|
---|
940 | # write_file -- used by ConvertToPlug, for example in post processing
|
---|
941 | #
|
---|
942 | sub utf8_write_file {
|
---|
943 | my $self = shift (@_);
|
---|
944 | my ($textref, $filename) = @_;
|
---|
945 |
|
---|
946 | if (!open (FILE, ">$filename")) {
|
---|
947 | gsprintf(STDERR, "ConvertToPlug::write_file {ConvertToPlug.could_not_open_for_writing} ($!)\n", $filename);
|
---|
948 | die "\n";
|
---|
949 | }
|
---|
950 | print FILE $$textref;
|
---|
951 |
|
---|
952 | close FILE;
|
---|
953 | }
|
---|
954 |
|
---|
955 |
|
---|
956 | sub filename_based_title
|
---|
957 | {
|
---|
958 | my $self = shift (@_);
|
---|
959 | my ($file) = @_;
|
---|
960 |
|
---|
961 | my $file_derived_title = $file;
|
---|
962 | $file_derived_title =~ s/_/ /g;
|
---|
963 | $file_derived_title =~ s/\..*?$//;
|
---|
964 |
|
---|
965 | return $file_derived_title;
|
---|
966 | }
|
---|
967 |
|
---|
968 |
|
---|
969 | sub title_fallback
|
---|
970 | {
|
---|
971 | my $self = shift (@_);
|
---|
972 | my ($doc_obj,$section,$file) = @_;
|
---|
973 |
|
---|
974 | if (!defined $doc_obj->get_metadata_element ($section, "Title")) {
|
---|
975 |
|
---|
976 | my $file_derived_title = $self->filename_based_title($file);
|
---|
977 | $doc_obj->add_metadata ($section, "Title", $file_derived_title);
|
---|
978 | }
|
---|
979 | }
|
---|
980 |
|
---|
981 | sub textcat_get_language_encoding {
|
---|
982 | my $self = shift (@_);
|
---|
983 | my ($filename) = @_;
|
---|
984 |
|
---|
985 |
|
---|
986 | my ($language, $encoding, $extracted_encoding);
|
---|
987 | if ($self->{'input_encoding'} eq "auto") {
|
---|
988 | # use textcat to automatically work out the input encoding and language
|
---|
989 | ($language, $encoding) = $self->get_language_encoding ($filename);
|
---|
990 | } elsif ($self->{'extract_language'}) {
|
---|
991 | # use textcat to get language metadata
|
---|
992 | ($language, $extracted_encoding) = $self->get_language_encoding ($filename);
|
---|
993 | $encoding = $self->{'input_encoding'};
|
---|
994 | # don't print this message for english... english in utf8 is identical
|
---|
995 | # to english in iso-8859-1 (except for some punctuation). We don't have
|
---|
996 | # a language model for en_utf8, so textcat always says iso-8859-1!
|
---|
997 | if ($extracted_encoding ne $encoding && $language ne "en"
|
---|
998 | && $self->{'verbosity'}) {
|
---|
999 | my $plugin_name = ref ($self);
|
---|
1000 | my $outhandle = $self->{'outhandle'};
|
---|
1001 | gsprintf($outhandle, "$plugin_name: {BasPlug.wrong_encoding}\n", $filename, $encoding, $extracted_encoding);
|
---|
1002 | # print $outhandle "$plugin_name: WARNING: $filename was read using $encoding encoding but ";
|
---|
1003 | # print $outhandle "appears to be encoded as $extracted_encoding.\n";
|
---|
1004 | }
|
---|
1005 | } else {
|
---|
1006 | $language = $self->{'default_language'};
|
---|
1007 | $encoding = $self->{'input_encoding'};
|
---|
1008 | }
|
---|
1009 |
|
---|
1010 | return ($language, $encoding);
|
---|
1011 | }
|
---|
1012 |
|
---|
1013 | # Uses textcat to work out the encoding and language of the text in
|
---|
1014 | # $filename. All html tags are removed before processing.
|
---|
1015 | # returns an array containing "language" and "encoding"
|
---|
1016 | sub get_language_encoding {
|
---|
1017 | my $self = shift (@_);
|
---|
1018 | my ($filename) = @_;
|
---|
1019 | my $outhandle = $self->{'outhandle'};
|
---|
1020 | my $unicode_format = "";
|
---|
1021 | # read in file
|
---|
1022 | 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";
|
---|
1023 | undef $/;
|
---|
1024 | my $text = <FILE>;
|
---|
1025 | $/ = "\n";
|
---|
1026 | close FILE;
|
---|
1027 |
|
---|
1028 | # check if first few bytes have a Byte Order Marker
|
---|
1029 | my $bom=substr($text,0,2); # check 16bit unicode
|
---|
1030 | if ($bom eq "\xff\xfe") { # little endian 16bit unicode
|
---|
1031 | $unicode_format="unicode";
|
---|
1032 | } elsif ($bom eq "\xfe\xff") { # big endian 16bit unicode
|
---|
1033 | $unicode_format="unicode";
|
---|
1034 | } else {
|
---|
1035 | $bom=substr($text,0,3); # check utf-8
|
---|
1036 | if ($bom eq "\xef\xbb\xbf") { # utf-8 coded FEFF bom
|
---|
1037 | $unicode_format="utf8";
|
---|
1038 | # } elsif ($bom eq "\xef\xbf\xbe") { # utf-8 coded FFFE bom. Error!?
|
---|
1039 | # $unicode_format="utf8";
|
---|
1040 | }
|
---|
1041 | }
|
---|
1042 |
|
---|
1043 | # VB scripting generated Word to HTML file
|
---|
1044 | if ($text =~ /charset=(windows.*)[\"]/ig){
|
---|
1045 | my $vbhtml_encoding = $1;
|
---|
1046 | $vbhtml_encoding =~ s/-+/_/g;
|
---|
1047 | $self->{'input_encoding'} = $vbhtml_encoding;
|
---|
1048 | }
|
---|
1049 |
|
---|
1050 | # remove <title>stuff</title> -- as titles tend often to be in English
|
---|
1051 | # for foreign language documents
|
---|
1052 | $text =~ s/<title>(.|\n)*?<\/title>//i;
|
---|
1053 |
|
---|
1054 | # remove all HTML tags
|
---|
1055 | # XXX this doesn't match plugins derived from HTMLPlug (except ConvertTo)
|
---|
1056 | if (ref($self) eq 'HTMLPlug' ||
|
---|
1057 | (exists $self->{'converted_to'} && $self->{'converted_to'} eq 'HTML')){
|
---|
1058 | $text =~ s/<[^>]*>//sg;
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 | # get the language/encoding
|
---|
1062 | my $results = $self->{'textcat'}->classify(\$text);
|
---|
1063 |
|
---|
1064 | # if textcat returns 3 or less possibilities we'll use the
|
---|
1065 | # first one in the list - otherwise use the defaults
|
---|
1066 | if (scalar @$results > 3) {
|
---|
1067 | my $best_encoding="";
|
---|
1068 | if ($unicode_format) { # in case the first had a BOM
|
---|
1069 | $best_encoding=$unicode_format;
|
---|
1070 | } else {
|
---|
1071 | my %guessed_encodings = ();
|
---|
1072 | foreach my $result (@$results) {
|
---|
1073 | $result =~ /([^\-]+)$/;
|
---|
1074 | my $enc=$1;
|
---|
1075 | if (!defined($guessed_encodings{$enc})) {
|
---|
1076 | $guessed_encodings{$enc}=0;
|
---|
1077 | }
|
---|
1078 | $guessed_encodings{$enc}++;
|
---|
1079 | }
|
---|
1080 |
|
---|
1081 | $guessed_encodings{""}=-1; # for default best_encoding of ""
|
---|
1082 | foreach my $enc (keys %guessed_encodings) {
|
---|
1083 | if ($guessed_encodings{$enc} >
|
---|
1084 | $guessed_encodings{$best_encoding}){
|
---|
1085 | $best_encoding=$enc;
|
---|
1086 | }
|
---|
1087 | }
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 | if ($self->{'input_encoding'} ne 'auto') {
|
---|
1091 | if ($self->{'extract_language'} && ($self->{'verbosity'}>2)) {
|
---|
1092 | gsprintf($outhandle,
|
---|
1093 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
---|
1094 | $filename, $self->{'default_language'});
|
---|
1095 | }
|
---|
1096 | return ($self->{'default_language'}, $self->{'input_encoding'});
|
---|
1097 |
|
---|
1098 | } else {
|
---|
1099 | if ($self->{'verbosity'}>2) {
|
---|
1100 | gsprintf($outhandle,
|
---|
1101 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
---|
1102 | $filename, $self->{'default_language'});
|
---|
1103 | }
|
---|
1104 | return ($self->{'default_language'}, $best_encoding);
|
---|
1105 | }
|
---|
1106 | }
|
---|
1107 |
|
---|
1108 | # format language/encoding
|
---|
1109 | my ($language, $encoding) = $results->[0] =~ /^([^-]*)(?:-(.*))?$/;
|
---|
1110 | if (!defined $language) {
|
---|
1111 | if ($self->{'verbosity'}>2) {
|
---|
1112 | gsprintf($outhandle,
|
---|
1113 | "BasPlug: {BasPlug.could_not_extract_language}\n",
|
---|
1114 | $filename, $self->{'default_language'});
|
---|
1115 | }
|
---|
1116 | $language = $self->{'default_language'};
|
---|
1117 | }
|
---|
1118 | if (!defined $encoding) {
|
---|
1119 | if ($self->{'verbosity'}>2) {
|
---|
1120 | gsprintf($outhandle,
|
---|
1121 | "BasPlug: {BasPlug.could_not_extract_encoding}\n",
|
---|
1122 | $filename, $self->{'default_encoding'});
|
---|
1123 | }
|
---|
1124 | $encoding = $self->{'default_encoding'};
|
---|
1125 | }
|
---|
1126 |
|
---|
1127 |
|
---|
1128 | # check for equivalents where textcat doesn't have some encodings...
|
---|
1129 | # eg MS versions of standard encodings
|
---|
1130 | if ($encoding =~ /^iso_8859_(\d+)/) {
|
---|
1131 | my $iso = $1; # which variant of the iso standard?
|
---|
1132 | # iso-8859 sets don't use chars 0x80-0x9f, windows codepages do
|
---|
1133 | if ($text =~ /[\x80-\x9f]/) {
|
---|
1134 | # Western Europe
|
---|
1135 | if ($iso == 1 or $iso == 15) { $encoding = 'windows_1252' }
|
---|
1136 | elsif ($iso == 2) { $encoding = 'windows_1250' } # Central Europe
|
---|
1137 | elsif ($iso == 5) { $encoding = 'windows_1251' } # Cyrillic
|
---|
1138 | elsif ($iso == 6) { $encoding = 'windows_1256' } # Arabic
|
---|
1139 | elsif ($iso == 7) { $encoding = 'windows_1253' } # Greek
|
---|
1140 | elsif ($iso == 8) { $encoding = 'windows_1255' } # Hebrew
|
---|
1141 | elsif ($iso == 9) { $encoding = 'windows_1254' } # Turkish
|
---|
1142 | }
|
---|
1143 | }
|
---|
1144 |
|
---|
1145 | if ($encoding !~ /^(ascii|utf8|unicode)$/ &&
|
---|
1146 | !defined $encodings::encodings->{$encoding}) {
|
---|
1147 | if ($self->{'verbosity'}) {
|
---|
1148 | gsprintf($outhandle, "BasPlug: {BasPlug.unsupported_encoding}\n",
|
---|
1149 | $filename, $encoding, $self->{'default_encoding'});
|
---|
1150 | }
|
---|
1151 | $encoding = $self->{'default_encoding'};
|
---|
1152 | }
|
---|
1153 |
|
---|
1154 | return ($language, $encoding);
|
---|
1155 | }
|
---|
1156 |
|
---|
1157 | # add any extra metadata that's been passed around from one
|
---|
1158 | # plugin to another.
|
---|
1159 | # extra_metadata uses add_utf8_metadata so it expects metadata values
|
---|
1160 | # to already be in utf8
|
---|
1161 | sub extra_metadata {
|
---|
1162 | my $self = shift (@_);
|
---|
1163 | my ($doc_obj, $cursection, $metadata) = @_;
|
---|
1164 |
|
---|
1165 | foreach my $field (keys(%$metadata)) {
|
---|
1166 | # $metadata->{$field} may be an array reference
|
---|
1167 | if ($field eq "gsdlassocfile_tobe") {
|
---|
1168 | # 'gsdlassocfile_tobe' is artificially introduced metadata
|
---|
1169 | # that is used to signal that certain additional files should
|
---|
1170 | # be tied to this document. Useful in situations where a
|
---|
1171 | # metadata pass in the plugin pipeline works out some files
|
---|
1172 | # need to be associated with a document, but the document hasn't
|
---|
1173 | # been formed yet.
|
---|
1174 |
|
---|
1175 | my $equiv_form = "";
|
---|
1176 | foreach my $gaf (@{$metadata->{$field}}) {
|
---|
1177 | my ($full_filename,$mimetype) = ($gaf =~ m/^(.*):(.*):$/);
|
---|
1178 | my ($tail_filename) = ($full_filename =~ /^.*[\/\\](.+?)$/);
|
---|
1179 | my $filename = $full_filename;
|
---|
1180 |
|
---|
1181 | $doc_obj->associate_file($full_filename,$tail_filename,$mimetype);
|
---|
1182 |
|
---|
1183 | my ($doc_ext) = ($tail_filename =~ m/^.*\.(.*)$/);
|
---|
1184 | my $start_doclink = "<a href=\"_httpcollection_/index/assoc/{Or}{[parent(Top):archivedir],[archivedir]}/$tail_filename\">";
|
---|
1185 | my $srcicon = "_icon".$doc_ext."_";
|
---|
1186 | my $end_doclink = "</a>";
|
---|
1187 |
|
---|
1188 | $equiv_form .= " $start_doclink\{If\}{$srcicon,$srcicon,$doc_ext\}$end_doclink";
|
---|
1189 | }
|
---|
1190 | $doc_obj->add_utf8_metadata ($cursection, "equivlink", $equiv_form);
|
---|
1191 | }
|
---|
1192 | elsif (ref ($metadata->{$field}) eq "ARRAY") {
|
---|
1193 | map {
|
---|
1194 | $doc_obj->add_utf8_metadata ($cursection, $field, $_);
|
---|
1195 | } @{$metadata->{$field}};
|
---|
1196 | } else {
|
---|
1197 | $doc_obj->add_utf8_metadata ($cursection, $field, $metadata->{$field});
|
---|
1198 | }
|
---|
1199 | }
|
---|
1200 | }
|
---|
1201 |
|
---|
1202 | # initialise metadata extractors
|
---|
1203 | sub initialise_extractors {
|
---|
1204 | my $self = shift (@_);
|
---|
1205 |
|
---|
1206 | if ($self->{'extract_acronyms'} || $self->{'markup_acronyms'}) {
|
---|
1207 | &acronym::initialise_acronyms();
|
---|
1208 | }
|
---|
1209 | }
|
---|
1210 |
|
---|
1211 | # finalise metadata extractors
|
---|
1212 | sub finalise_extractors {
|
---|
1213 | my $self = shift (@_);
|
---|
1214 |
|
---|
1215 | if ($self->{'extract_acronyms'} || $self->{'markup_acronyms'}) {
|
---|
1216 | &acronym::finalise_acronyms();
|
---|
1217 | }
|
---|
1218 | }
|
---|
1219 |
|
---|
1220 | # FIRSTNNN: extract the first NNN characters as metadata
|
---|
1221 | sub extract_first_NNNN_characters {
|
---|
1222 | my $self = shift (@_);
|
---|
1223 | my ($textref, $doc_obj, $thissection) = @_;
|
---|
1224 |
|
---|
1225 | foreach my $size (split /,/, $self->{'first'}) {
|
---|
1226 | my $tmptext = $$textref;
|
---|
1227 | $tmptext =~ s/^\s+//;
|
---|
1228 | $tmptext =~ s/\s+$//;
|
---|
1229 | $tmptext =~ s/\s+/ /gs;
|
---|
1230 | $tmptext = substr ($tmptext, 0, $size);
|
---|
1231 | $tmptext =~ s/\s\S*$/…/;
|
---|
1232 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
---|
1233 | }
|
---|
1234 | }
|
---|
1235 |
|
---|
1236 | sub extract_email {
|
---|
1237 | my $self = shift (@_);
|
---|
1238 | my ($textref, $doc_obj, $thissection) = @_;
|
---|
1239 | my $outhandle = $self->{'outhandle'};
|
---|
1240 |
|
---|
1241 | gsprintf($outhandle, " {BasPlug.extracting_emails}...\n")
|
---|
1242 | if ($self->{'verbosity'} > 2);
|
---|
1243 |
|
---|
1244 | my @email = ($$textref =~ m/([-a-z0-9\.@+_=]+@(?:[-a-z0-9]+\.)+(?:com|org|edu|mil|int|net|[a-z][a-z]))/g);
|
---|
1245 | @email = sort @email;
|
---|
1246 |
|
---|
1247 | # if($self->{"new_extract_email"} == 0)
|
---|
1248 | # {
|
---|
1249 | # my @email2 = ();
|
---|
1250 | # foreach my $address (@email)
|
---|
1251 | # {
|
---|
1252 | # if (!(join(" ",@email2) =~ m/(^| )$address( |$)/ ))
|
---|
1253 | # {
|
---|
1254 | # push @email2, $address;
|
---|
1255 | # $doc_obj->add_utf8_metadata ($thissection, "emailAddress", $address);
|
---|
1256 | # # print $outhandle " extracting $address\n"
|
---|
1257 | # &gsprintf($outhandle, " {BasPlug.extracting} $address\n")
|
---|
1258 | # if ($self->{'verbosity'} > 3);
|
---|
1259 | # }
|
---|
1260 | # }
|
---|
1261 | # }
|
---|
1262 | # else
|
---|
1263 | # {
|
---|
1264 | my $hashExistMail = {};
|
---|
1265 | foreach my $address (@email) {
|
---|
1266 | if (!(defined $hashExistMail->{$address}))
|
---|
1267 | {
|
---|
1268 | $hashExistMail->{$address} = 1;
|
---|
1269 | $doc_obj->add_utf8_metadata ($thissection, "emailAddress", $address);
|
---|
1270 | gsprintf($outhandle, " {BasPlug.extracting} $address\n")
|
---|
1271 | if ($self->{'verbosity'} > 3);
|
---|
1272 | }
|
---|
1273 | }
|
---|
1274 | gsprintf($outhandle, " {BasPlug.done_email_extract}\n")
|
---|
1275 | if ($self->{'verbosity'} > 2);
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 | # extract metadata
|
---|
1279 | sub auto_extract_metadata {
|
---|
1280 |
|
---|
1281 | my $self = shift (@_);
|
---|
1282 | my ($doc_obj) = @_;
|
---|
1283 |
|
---|
1284 | if ($self->{'extract_email'}) {
|
---|
1285 | my $thissection = $doc_obj->get_top_section();
|
---|
1286 | while (defined $thissection) {
|
---|
1287 | my $text = $doc_obj->get_text($thissection);
|
---|
1288 | $self->extract_email (\$text, $doc_obj, $thissection) if $text =~ /./;
|
---|
1289 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1290 | }
|
---|
1291 | }
|
---|
1292 | if ($self->{'extract_placenames'}) {
|
---|
1293 | my $thissection = $doc_obj->get_top_section();
|
---|
1294 | while (defined $thissection) {
|
---|
1295 | my $text = $doc_obj->get_text($thissection);
|
---|
1296 | $self->extract_placenames (\$text, $doc_obj, $thissection) if $text =~ /./;
|
---|
1297 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1298 | }
|
---|
1299 | }
|
---|
1300 |
|
---|
1301 | #adding kea keyphrases
|
---|
1302 | if ($self->{'extract_keyphrases'}) {
|
---|
1303 |
|
---|
1304 | my $thissection = $doc_obj->get_top_section();
|
---|
1305 | my $text = "";
|
---|
1306 | my $list;
|
---|
1307 |
|
---|
1308 | #loop through sections to gather whole doc
|
---|
1309 | while (defined $thissection) {
|
---|
1310 | my $sectiontext = $doc_obj->get_text($thissection);
|
---|
1311 | $text = $text.$sectiontext;
|
---|
1312 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1313 | }
|
---|
1314 |
|
---|
1315 | if($self->{'extract_keyphrase_options'}) { #if kea options flag is set, call Kea with specified options
|
---|
1316 | $list = &Kea::extract_KeyPhrases ($text, $self->{'extract_keyphrase_options'});
|
---|
1317 | } else { #otherwise call Kea with no options
|
---|
1318 | $list = &Kea::extract_KeyPhrases ($text);
|
---|
1319 | }
|
---|
1320 |
|
---|
1321 | if ($list){
|
---|
1322 | # if a list of kea keyphrases was returned (ie not empty)
|
---|
1323 | if ($self->{'verbosity'}) {
|
---|
1324 | gsprintf(STDERR, "{BasPlug.keyphrases}: $list\n");
|
---|
1325 | }
|
---|
1326 |
|
---|
1327 | #add metadata to top section
|
---|
1328 | $thissection = $doc_obj->get_top_section();
|
---|
1329 |
|
---|
1330 | # add all key phrases as one metadata
|
---|
1331 | $doc_obj->add_metadata($thissection, "Keyphrases", $list);
|
---|
1332 |
|
---|
1333 | # add individual key phrases as multiple metadata
|
---|
1334 | foreach my $keyphrase (split(',', $list)) {
|
---|
1335 | $keyphrase =~ s/^\s+|\s+$//g;
|
---|
1336 | $doc_obj->add_metadata($thissection, "Keyphrase", $keyphrase);
|
---|
1337 | }
|
---|
1338 | }
|
---|
1339 | } #end of kea
|
---|
1340 |
|
---|
1341 | if ($self->{'first'}) {
|
---|
1342 | my $thissection = $doc_obj->get_top_section();
|
---|
1343 | while (defined $thissection) {
|
---|
1344 | my $text = $doc_obj->get_text($thissection);
|
---|
1345 | $self->extract_first_NNNN_characters (\$text, $doc_obj, $thissection) if $text =~ /./;
|
---|
1346 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1347 | }
|
---|
1348 | }
|
---|
1349 |
|
---|
1350 | if ($self->{'extract_acronyms'}) {
|
---|
1351 | my $thissection = $doc_obj->get_top_section();
|
---|
1352 | while (defined $thissection) {
|
---|
1353 | my $text = $doc_obj->get_text($thissection);
|
---|
1354 | $self->extract_acronyms (\$text, $doc_obj, $thissection) if $text =~ /./;
|
---|
1355 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1356 | }
|
---|
1357 | }
|
---|
1358 |
|
---|
1359 | if ($self->{'markup_acronyms'}) {
|
---|
1360 | my $thissection = $doc_obj->get_top_section();
|
---|
1361 | while (defined $thissection) {
|
---|
1362 | my $text = $doc_obj->get_text($thissection);
|
---|
1363 | $text = $self->markup_acronyms ($text, $doc_obj, $thissection);
|
---|
1364 | $doc_obj->delete_text($thissection);
|
---|
1365 | $doc_obj->add_text($thissection, $text);
|
---|
1366 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1367 | }
|
---|
1368 | }
|
---|
1369 |
|
---|
1370 | if($self->{'extract_historical_years'}) {
|
---|
1371 | my $thissection = $doc_obj->get_top_section();
|
---|
1372 | while (defined $thissection) {
|
---|
1373 |
|
---|
1374 | my $text = $doc_obj->get_text($thissection);
|
---|
1375 | &DateExtract::get_date_metadata($text, $doc_obj,
|
---|
1376 | $thissection,
|
---|
1377 | $self->{'no_bibliography'},
|
---|
1378 | $self->{'maximum_year'},
|
---|
1379 | $self->{'maximum_century'});
|
---|
1380 | $thissection = $doc_obj->get_next_section ($thissection);
|
---|
1381 | }
|
---|
1382 | }
|
---|
1383 | }
|
---|
1384 |
|
---|
1385 | # extract acronyms from a section in a document. progress is
|
---|
1386 | # reported to outhandle based on the verbosity. both the Acronym
|
---|
1387 | # and the AcronymKWIC metadata items are created.
|
---|
1388 |
|
---|
1389 | sub extract_acronyms {
|
---|
1390 | my $self = shift (@_);
|
---|
1391 | my ($textref, $doc_obj, $thissection) = @_;
|
---|
1392 | my $outhandle = $self->{'outhandle'};
|
---|
1393 |
|
---|
1394 | # print $outhandle " extracting acronyms ...\n"
|
---|
1395 | gsprintf($outhandle, " {BasPlug.extracting_acronyms}...\n")
|
---|
1396 | if ($self->{'verbosity'} > 2);
|
---|
1397 |
|
---|
1398 | my $acro_array = &acronym::acronyms($textref);
|
---|
1399 |
|
---|
1400 | foreach my $acro (@$acro_array) {
|
---|
1401 |
|
---|
1402 | #check that this is the first time ...
|
---|
1403 | my $seen_before = "false";
|
---|
1404 | my $previous_data = $doc_obj->get_metadata($thissection, "Acronym");
|
---|
1405 | foreach my $thisAcro (@$previous_data) {
|
---|
1406 | if ($thisAcro eq $acro->to_string()) {
|
---|
1407 | $seen_before = "true";
|
---|
1408 | if ($self->{'verbosity'} >= 4) {
|
---|
1409 | gsprintf($outhandle, " {BasPlug.already_seen} " .
|
---|
1410 | $acro->to_string() . "\n");
|
---|
1411 | }
|
---|
1412 | }
|
---|
1413 | }
|
---|
1414 |
|
---|
1415 | if ($seen_before eq "false") {
|
---|
1416 | #write it to the file ...
|
---|
1417 | $acro->write_to_file();
|
---|
1418 |
|
---|
1419 | #do the normal acronym
|
---|
1420 | $doc_obj->add_utf8_metadata($thissection, "Acronym", $acro->to_string());
|
---|
1421 | gsprintf($outhandle, " {BasPlug.adding} ".$acro->to_string()."\n")
|
---|
1422 | if ($self->{'verbosity'} > 3);
|
---|
1423 | }
|
---|
1424 | }
|
---|
1425 |
|
---|
1426 | gsprintf($outhandle, " {BasPlug.done_acronym_extract}\n")
|
---|
1427 | if ($self->{'verbosity'} > 2);
|
---|
1428 | }
|
---|
1429 |
|
---|
1430 | sub markup_acronyms {
|
---|
1431 | my $self = shift (@_);
|
---|
1432 | my ($text, $doc_obj, $thissection) = @_;
|
---|
1433 | my $outhandle = $self->{'outhandle'};
|
---|
1434 |
|
---|
1435 | gsprintf($outhandle, " {BasPlug.marking_up_acronyms}...\n")
|
---|
1436 | if ($self->{'verbosity'} > 2);
|
---|
1437 |
|
---|
1438 | #self is passed in to check for verbosity ...
|
---|
1439 | $text = &acronym::markup_acronyms($text, $self);
|
---|
1440 |
|
---|
1441 | gsprintf($outhandle, " {BasPlug.done_acronym_markup}\n")
|
---|
1442 | if ($self->{'verbosity'} > 2);
|
---|
1443 |
|
---|
1444 | return $text;
|
---|
1445 | }
|
---|
1446 |
|
---|
1447 | sub compile_stats {
|
---|
1448 | my $self = shift(@_);
|
---|
1449 | my ($stats) = @_;
|
---|
1450 |
|
---|
1451 | $stats->{'num_processed'} += $self->{'num_processed'};
|
---|
1452 | $stats->{'num_not_processed'} += $self->{'num_not_processed'};
|
---|
1453 | $stats->{'num_archives'} += $self->{'num_archives'};
|
---|
1454 |
|
---|
1455 | }
|
---|
1456 |
|
---|
1457 | sub associate_cover_image {
|
---|
1458 | my $self = shift;
|
---|
1459 | my ($doc_obj, $filename) = @_;
|
---|
1460 |
|
---|
1461 | $filename =~ s/\.[^\\\/\.]+$/\.jpg/;
|
---|
1462 | if (exists $self->{'covers_missing_cache'}->{$filename}) {
|
---|
1463 | # don't stat() for existence eg for multiple document input files
|
---|
1464 | # (eg SplitPlug)
|
---|
1465 | return;
|
---|
1466 | }
|
---|
1467 |
|
---|
1468 | my $top_section=$doc_obj->get_top_section();
|
---|
1469 |
|
---|
1470 | if (-e $filename) {
|
---|
1471 | $doc_obj->associate_file($filename, "cover.jpg", "image/jpeg");
|
---|
1472 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
---|
1473 | } else {
|
---|
1474 | my $upper_filename = $filename;
|
---|
1475 | $upper_filename =~ s/jpg$/JPG/;
|
---|
1476 | if (-e $upper_filename) {
|
---|
1477 | $doc_obj->associate_file($upper_filename, "cover.jpg",
|
---|
1478 | "image/jpeg");
|
---|
1479 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
---|
1480 | } else {
|
---|
1481 | # file doesn't exist, so record the fact that it's missing so
|
---|
1482 | # we don't stat() again (stat is slow)
|
---|
1483 | $self->{'covers_missing_cache'}->{$filename} = 1;
|
---|
1484 | }
|
---|
1485 | }
|
---|
1486 |
|
---|
1487 | }
|
---|
1488 |
|
---|
1489 | 1;
|
---|