1 | ###########################################################################
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2 | #
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3 | # BasePlugin.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 BasePlugin;
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27 |
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28 | use strict;
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29 | no strict 'subs';
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30 | no strict 'refs'; # allow filehandles to be variables and viceversa
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31 |
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32 | use File::Basename;
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33 |
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34 | use multiread;
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35 | use encodings;
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36 | use unicode;
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37 | use doc;
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38 | eval "require diagnostics"; # some perl distros (eg mac) don't have this
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39 | use ghtml;
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40 | use gsprintf 'gsprintf';
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41 |
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42 | use PrintInfo;
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43 |
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44 | BEGIN {
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45 | @BasePlugin::ISA = ( 'PrintInfo' );
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46 | }
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47 |
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48 | our $encoding_list =
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49 | [ { 'name' => "ascii",
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50 | 'desc' => "{ReadTextFile.input_encoding.ascii}" },
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51 | { 'name' => "utf8",
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52 | 'desc' => "{ReadTextFile.input_encoding.utf8}" },
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53 | { 'name' => "unicode",
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54 | 'desc' => "{ReadTextFile.input_encoding.unicode}" } ];
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55 |
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56 | my $e = $encodings::encodings;
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57 | foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e))
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58 | {
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59 | my $hashEncode =
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60 | {'name' => $enc,
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61 | 'desc' => $e->{$enc}->{'name'}};
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62 |
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63 | push(@{$encoding_list},$hashEncode);
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64 | }
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65 |
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66 | our $encoding_plus_auto_list =
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67 | [ { 'name' => "auto",
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68 | 'desc' => "{ReadTextFile.input_encoding.auto}" } ];
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69 |
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70 | push(@{$encoding_plus_auto_list},@{$encoding_list});
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71 |
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72 | my $arguments =
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73 | [ { 'name' => "process_exp",
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74 | 'desc' => "{BasePlugin.process_exp}",
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75 | 'type' => "regexp",
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76 | 'deft' => "",
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77 | 'reqd' => "no" },
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78 | { 'name' => "block_exp",
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79 | 'desc' => "{BasePlugin.block_exp}",
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80 | 'type' => "regexp",
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81 | 'deft' => "",
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82 | 'reqd' => "no" },
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83 | { 'name' => "smart_block",
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84 | 'desc' => "{BasePlugin.smart_block}",
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85 | 'type' => "flag",
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86 | 'reqd' => "no" },
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87 | { 'name' => "associate_ext",
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88 | 'desc' => "{BasePlugin.associate_ext}",
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89 | 'type' => "string",
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90 | 'reqd' => "no" },
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91 | { 'name' => "associate_tail_re",
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92 | 'desc' => "{BasePlugin.associate_tail_re}",
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93 | 'type' => "string",
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94 | 'reqd' => "no" },
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95 | { 'name' => "use_as_doc_identifier",
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96 | 'desc' => "{BasePlugin.use_as_doc_identifier}",
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97 | 'type' => "string",
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98 | 'reqd' => "no" ,
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99 | 'deft' => "" } ,
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100 | { 'name' => "no_cover_image",
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101 | 'desc' => "{BasePlugin.no_cover_image}",
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102 | 'type' => "flag",
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103 | 'reqd' => "no" },
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104 | { 'name' => "filename_encoding",
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105 | 'desc' => "{BasePlugin.filename_encoding}",
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106 | 'type' => "enum",
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107 | 'deft' => "auto",
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108 | 'list' => $encoding_plus_auto_list,
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109 | 'reqd' => "no" }
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110 |
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111 | ];
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112 |
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113 |
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114 | my $options = { 'name' => "BasePlugin",
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115 | 'desc' => "{BasePlugin.desc}",
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116 | 'abstract' => "yes",
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117 | 'inherits' => "no",
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118 | 'args' => $arguments };
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119 |
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120 |
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121 | sub new {
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122 |
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123 | my ($class) = shift (@_);
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124 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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125 | push(@$pluginlist, $class);
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126 |
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127 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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128 | push(@{$hashArgOptLists->{"OptList"}},$options);
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129 |
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130 | my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists);
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131 |
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132 | my $plugin_name = (defined $pluginlist->[0]) ? $pluginlist->[0] : $class;
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133 | $self->{'plugin_type'} = $plugin_name;
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134 |
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135 | $self->{'num_processed'} = 0;
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136 | $self->{'num_not_processed'} = 0;
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137 | $self->{'num_blocked'} = 0;
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138 | $self->{'num_archives'} = 0;
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139 | $self->{'cover_image'} = 1; # cover image is on by default
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140 | $self->{'cover_image'} = 0 if ($self->{'no_cover_image'});
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141 | #$self->{'option_list'} = $hashArgOptLists->{"OptList"};
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142 |
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143 | my $associate_ext = $self->{'associate_ext'};
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144 | if ((defined $associate_ext) && ($associate_ext ne "")) {
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145 |
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146 | my $associate_tail_re = $self->{'associate_tail_re'};
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147 | if ((defined $associate_tail_re) && ($associate_tail_re ne "")) {
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148 | my $outhandle = $self->{'outhandle'};
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149 | print $outhandle "Warning: can only specify 'associate_ext' or 'associate_tail_re'\n";
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150 | print $outhandle " defaulting to 'associate_tail_re'\n";
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151 | }
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152 | else {
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153 | my @exts = split(/,/,$associate_ext);
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154 |
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155 | my @exts_bracketed = map { $_ = "(?:\\.$_)" } @exts;
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156 | my $associate_tail_re = join("|",@exts_bracketed);
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157 | $self->{'associate_tail_re'} = $associate_tail_re;
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158 | }
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159 |
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160 | delete $self->{'associate_ext'};
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161 | }
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162 |
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163 | $self->{'shared_fileroot'} = {};
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164 | $self->{'file_blocks'} = {};
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165 |
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166 |
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167 | return bless $self, $class;
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168 |
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169 | }
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170 |
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171 | # initialize BasePlugin options
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172 | # if init() is overridden in a sub-class, remember to call BasePlugin::init()
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173 | sub init {
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174 | my $self = shift (@_);
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175 | my ($verbosity, $outhandle, $failhandle) = @_;
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176 |
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177 | # verbosity is passed through from the processor
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178 | $self->{'verbosity'} = $verbosity;
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179 |
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180 | # as are the outhandle and failhandle
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181 | $self->{'outhandle'} = $outhandle if defined $outhandle;
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182 | $self->{'failhandle'} = $failhandle;
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183 |
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184 | # set process_exp and block_exp to defaults unless they were
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185 | # explicitly set
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186 |
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187 | if ((!$self->is_recursive()) and
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188 | (!defined $self->{'process_exp'}) || ($self->{'process_exp'} eq "")) {
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189 |
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190 | $self->{'process_exp'} = $self->get_default_process_exp ();
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191 | if ($self->{'process_exp'} eq "") {
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192 | warn ref($self) . " Warning: Non-recursive plugin has no process_exp\n";
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193 | }
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194 | }
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195 |
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196 | if ((!defined $self->{'block_exp'}) || ($self->{'block_exp'} eq "")) {
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197 | $self->{'block_exp'} = $self->get_default_block_exp ();
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198 | }
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199 |
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200 | }
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201 |
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202 | sub begin {
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203 | my $self = shift (@_);
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204 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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205 | }
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206 |
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207 | sub end {
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208 | # potentially called at the end of each plugin pass
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209 | # import.pl only has one plugin pass, but buildcol.pl has multiple ones
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210 |
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211 | my ($self) = shift (@_);
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212 | }
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213 |
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214 | sub deinit {
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215 | # called only once, after all plugin passes have been done
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216 |
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217 | my ($self) = @_;
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218 | }
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219 |
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220 | sub set_incremental {
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221 | my $self = shift(@_);
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222 | my ($incremental) = @_;
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223 |
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224 | $self->{'incremental'} = $incremental;
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225 | }
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226 |
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227 | # this function should be overridden to return 1
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228 | # in recursive plugins
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229 | sub is_recursive {
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230 | my $self = shift (@_);
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231 |
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232 | return 0;
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233 | }
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234 |
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235 | sub get_default_block_exp {
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236 | my $self = shift (@_);
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237 |
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238 | return "";
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239 | }
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240 |
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241 | sub get_default_process_exp {
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242 | my $self = shift (@_);
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243 |
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244 | return "";
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245 | }
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246 |
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247 | # default implementation is to do nothing.
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248 | sub store_block_files
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249 | {
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250 | my $self =shift (@_);
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251 | my ($filename) = @_;
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252 | return;
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253 | }
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254 |
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255 | #default implementation is to block a file with same name as this, but extension jpg or JPG, if cover_images is on.
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256 | sub block_cover_image
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257 | {
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258 | my $self =shift;
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259 | my $filename = shift;
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260 |
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261 | if ($self->{'cover_image'}) {
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262 | my $coverfile = $filename;
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263 | $coverfile =~ s/\.[^\\\/\.]+$/\.jpg/;
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264 | if (!-e $coverfile) {
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265 | $coverfile =~ s/jpg$/JPG/;
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266 | }
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267 | if (-e $coverfile) {
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268 | $self->{'file_blocks'}->{$coverfile} = 1;
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269 | }
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270 | }
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271 |
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272 | return;
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273 | }
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274 |
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275 | sub root_ext_split
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276 | {
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277 | my $self = shift (@_);
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278 | my ($filename,$tail_re) = @_;
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279 |
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280 | my ($file_prefix,$file_ext) = ($filename =~ m/^(.*?)($tail_re)$/);
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281 |
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282 | if ((!defined $file_prefix) || (!defined $file_ext)) {
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283 | ($file_prefix,$file_ext) = ($filename =~ m/^(.*)(\..*?)$/);
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284 | }
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285 |
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286 | return ($file_prefix,$file_ext);
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287 | }
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288 |
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289 | sub metadata_read {
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290 | my $self = shift (@_);
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291 | my ($pluginfo, $base_dir, $file, $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
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292 | # Keep track of filenames with same root but different extensions
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293 | # Used to support -associate_ext and the more generalised
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294 | # -associate_tail_re
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295 |
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296 | my $associate_tail_re = $self->{'associate_tail_re'};
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297 | if ((defined $associate_tail_re) && ($associate_tail_re ne "")) {
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298 |
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299 | my ($file_prefix,$file_ext)
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300 | = $self->root_ext_split($file,$associate_tail_re);
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301 |
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302 | if ((defined $file_prefix) && (defined $file_ext)) {
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303 |
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304 | my $shared_fileroot = $self->{'shared_fileroot'};
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305 | if (!defined $shared_fileroot->{$file_prefix}) {
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306 | my $file_prefix_rec = { 'tie_to' => undef,
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307 | 'exts' => {} };
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308 | $shared_fileroot->{$file_prefix} = $file_prefix_rec;
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309 | }
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310 |
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311 | my $file_prefix_rec = $shared_fileroot->{$file_prefix};
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312 |
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313 | my $process_exp = $self->{'process_exp'};
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314 |
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315 | if ($file =~ m/$process_exp/) {
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316 | # This is the document the others should be tied to
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317 | $file_prefix_rec->{'tie_to'} = $file_ext;
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318 | }
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319 | else {
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320 | if ($file_ext =~ m/$associate_tail_re$/) {
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321 | $file_prefix_rec->{'exts'}->{$file_ext} = 1;
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322 | }
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323 | }
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324 |
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325 | }
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326 | }
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327 |
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328 | # now check whether we are actually processing this
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329 | my $filename = $file;
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330 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
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331 | if ($self->{'process_exp'} eq "" || $filename !~ /$self->{'process_exp'}/ || !-f $filename) {
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332 | return undef; # can't recognise
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333 | }
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334 |
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335 | # do smart blocking if appropriate
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336 | if ($self->{'smart_block'}) {
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337 | $self->store_block_files($filename);
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338 | }
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339 | # block the cover image if there is one
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340 | if ($self->{'cover_image'}) {
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341 | $self->block_cover_image($filename);
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342 | }
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343 |
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344 | return 1;
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345 | }
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346 |
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347 | sub tie_to_filename
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348 | {
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349 | my $self = shift (@_);
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350 |
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351 | my ($file_ext,$file_prefix_rec) = @_;
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352 |
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353 | if (defined $file_prefix_rec) {
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354 | my $tie_to = $file_prefix_rec->{'tie_to'};
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355 |
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356 | if (defined $tie_to) {
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357 | if ($tie_to eq $file_ext) {
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358 | return 1;
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359 | }
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360 | }
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361 | }
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362 |
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363 | return 0;
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364 | }
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365 |
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366 | sub tie_to_assoc_file
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367 | {
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368 | my $self = shift (@_);
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369 | my ($file_ext,$file_prefix_rec) = @_;
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370 |
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371 | if (defined $file_prefix_rec) {
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372 | my $tie_to = $file_prefix_rec->{'tie_to'};
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373 | if (defined $tie_to) {
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374 |
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375 | my $exts = $file_prefix_rec->{'exts'};
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376 |
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377 | my $has_file_ext = $exts->{$file_ext};
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378 |
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379 | if ($has_file_ext) {
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380 | return 1;
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381 | }
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382 | }
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383 | }
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384 |
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385 | return 0;
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386 | }
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387 |
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388 |
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389 | sub associate_with
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390 | {
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391 | my $self = shift (@_);
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392 | my ($file, $filename, $metadata) = @_;
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393 |
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394 | my $associate_tail_re = $self->{'associate_tail_re'};
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395 | return 0 if (!$associate_tail_re);
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396 |
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397 | # If file, see if matches with "tie_to" doc or is one of the
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398 | # associated filename extensions.
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399 |
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400 | my ($file_prefix,$file_ext) = $self->root_ext_split($file,$associate_tail_re);
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401 |
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402 | if ((defined $file_prefix) && (defined $file_ext)) {
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403 |
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404 | my $file_prefix_rec = $self->{'shared_fileroot'}->{$file_prefix};
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405 |
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406 | if ($self->tie_to_filename($file_ext,$file_prefix_rec)) {
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407 |
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408 | # Set up gsdlassocfile_tobe
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409 |
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410 | my $exts = $file_prefix_rec->{'exts'};
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411 |
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412 | if (!defined $metadata->{'gsdlassocfile_tobe'}) {
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413 | $metadata->{'gsdlassocfile_tobe'} = [];
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414 | }
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415 |
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416 | my $assoc_tobe = $metadata->{'gsdlassocfile_tobe'};
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417 |
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418 | my ($full_prefix) = ($filename =~ m/^(.*)\..*?$/);
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419 | foreach my $e (keys %$exts) {
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420 | my $assoc_file = "$full_prefix$e";
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421 | print STDERR " $self->{'plugin_type'}: Associating $file_prefix$e with $file_prefix_rec->{'tie_to'} version\n";
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422 | my $mime_type = ""; # let system auto detect this
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423 | push(@$assoc_tobe,"$assoc_file:$mime_type:");
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424 | }
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425 |
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426 | }
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427 | elsif ($self->tie_to_assoc_file($file_ext,$file_prefix_rec)) {
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428 |
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429 |
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430 | # a form of smart block
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431 | return 1;
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432 | }
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433 | }
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434 |
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435 | return 0;
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436 | }
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437 |
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438 | sub get_full_filenames {
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439 | my $self = shift (@_);
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440 | my ($base_dir, $file) = @_;
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441 |
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442 | my $filename_full_path = $file;
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443 | # add on directory if present
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444 | $filename_full_path = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
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445 | my $filename_no_path = $file;
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446 | # remove directory if present
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447 | $filename_no_path =~ s/^.*[\/\\]//;
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448 | return ($filename_full_path, $filename_no_path);
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449 | }
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450 |
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451 | sub read_block {
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452 | my $self = shift (@_);
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453 |
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454 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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455 |
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456 |
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457 | my ($filename_full_path, $filename_no_path) = $self->get_full_filenames($base_dir, $file);
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458 |
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---|
459 | if ($self->associate_with($file,$filename_full_path,$metadata)) {
|
---|
460 | # a form of smart block
|
---|
461 | $self->{'num_blocked'} ++;
|
---|
462 | return (0,undef); # blocked
|
---|
463 | }
|
---|
464 |
|
---|
465 | my $smart_block = $self->{'smart_block'};
|
---|
466 | my $smart_block_BN = $self->{'smart_block_BN'};
|
---|
467 |
|
---|
468 | if ($smart_block || $smart_block_BN) {
|
---|
469 | if (defined $self->{'file_blocks'}->{$filename_full_path} && $self->{'file_blocks'}->{$filename_full_path} == 1){
|
---|
470 | $self->{'num_blocked'} ++;
|
---|
471 | return (0,undef); # blocked
|
---|
472 | }
|
---|
473 | } else {
|
---|
474 | if ($self->{'block_exp'} ne "" && $filename_full_path =~ /$self->{'block_exp'}/) {
|
---|
475 | $self->{'num_blocked'} ++;
|
---|
476 | return (0,undef); # blocked
|
---|
477 | }
|
---|
478 | if ($self->{'cover_image'}) {
|
---|
479 | if (defined $self->{'file_blocks'}->{$filename_full_path} && $self->{'file_blocks'}->{$filename_full_path} == 1){
|
---|
480 | $self->{'num_blocked'} ++;
|
---|
481 | return (0,undef); # blocked
|
---|
482 | }
|
---|
483 | }
|
---|
484 | }
|
---|
485 |
|
---|
486 | if ($filename_full_path !~ /$self->{'process_exp'}/ || !-f $filename_full_path) {
|
---|
487 | return (undef,undef); # can't recognise
|
---|
488 | }
|
---|
489 |
|
---|
490 | ##why are we returning the full filename - do we need this??
|
---|
491 | return (1,$filename_full_path);
|
---|
492 | }
|
---|
493 |
|
---|
494 |
|
---|
495 | #filename_encoding set by user
|
---|
496 | sub filename_to_utf8_metadata
|
---|
497 | {
|
---|
498 | my $self = shift (@_);
|
---|
499 | my ($file, $file_encoding) = @_;
|
---|
500 |
|
---|
501 | my $outhandle = $self->{'outhandle'};
|
---|
502 |
|
---|
503 | my ($filemeta) = $file =~ /([^\\\/]+)$/; # getting the tail of the filepath (skips all string parts containing slashes upto the end)
|
---|
504 |
|
---|
505 | my $filename_encoding = $self->{'filename_encoding'};
|
---|
506 | if ($filename_encoding eq "auto") {
|
---|
507 | # we check the locale first
|
---|
508 | if (!defined $self->{'filesystem_encoding'}) {
|
---|
509 | $self->{'filesystem_encoding'} = $self->get_filesystem_encoding();
|
---|
510 | $self->{'filesystem_encoding'} = "undefined" if !defined $self->{'filesystem_encoding'};
|
---|
511 | }
|
---|
512 | if ($self->{'filesystem_encoding'} ne "undefined") {
|
---|
513 | $filename_encoding = $self->{'filesystem_encoding'};
|
---|
514 | } else {
|
---|
515 | # try the encoding of the document, if available
|
---|
516 | if (defined $file_encoding) {
|
---|
517 | $filename_encoding = $file_encoding;
|
---|
518 | } else {
|
---|
519 | # use utf8
|
---|
520 | $filename_encoding = "utf8";
|
---|
521 | }
|
---|
522 | }
|
---|
523 |
|
---|
524 | }
|
---|
525 |
|
---|
526 | if ($filename_encoding !~ /(?:ascii|utf8|unicode)/) {
|
---|
527 | $filemeta = unicode::unicode2utf8(
|
---|
528 | unicode::convert2unicode($filename_encoding, \$filemeta)
|
---|
529 | );
|
---|
530 | }
|
---|
531 | my $dmsafe_filemeta = &ghtml::dmsafe($filemeta);
|
---|
532 |
|
---|
533 | return $dmsafe_filemeta;
|
---|
534 |
|
---|
535 | }
|
---|
536 |
|
---|
537 |
|
---|
538 | sub get_filesystem_encoding {
|
---|
539 |
|
---|
540 | my $self = shift(@_);
|
---|
541 |
|
---|
542 | my $outhandle = $self->{'outhandle'};
|
---|
543 | my $filesystem_encoding = undef;
|
---|
544 |
|
---|
545 | eval {
|
---|
546 | use POSIX qw(locale_h);
|
---|
547 |
|
---|
548 | # With only one parameter, setlocale retrieves the
|
---|
549 | # current value
|
---|
550 | my $current_locale = setlocale(LC_CTYPE);
|
---|
551 |
|
---|
552 | if ($current_locale =~ m/^.*\.(.*?)$/) {
|
---|
553 | my $char_encoding = lc($1);
|
---|
554 | if ($char_encoding =~ m/^(iso)(8859)(\d{1,2})$/) {
|
---|
555 | $char_encoding = "$1\_$2\_$3";
|
---|
556 | }
|
---|
557 |
|
---|
558 | $char_encoding =~ s/-/_/g;
|
---|
559 | $char_encoding =~ s/^utf_8$/utf8/;
|
---|
560 |
|
---|
561 | if ($char_encoding =~ m/^\d+$/) {
|
---|
562 | if (defined $encodings::encodings->{"windows_$char_encoding"}) {
|
---|
563 | $char_encoding = "windows_$char_encoding";
|
---|
564 | }
|
---|
565 | elsif (defined $encodings::encodings->{"dos_$char_encoding"}) {
|
---|
566 | $char_encoding = "dos_$char_encoding";
|
---|
567 | }
|
---|
568 | }
|
---|
569 |
|
---|
570 | if (($char_encoding =~ m/(?:ascii|utf8|unicode)/)
|
---|
571 | || (defined $encodings::encodings->{$char_encoding})) {
|
---|
572 | $filesystem_encoding = $char_encoding;
|
---|
573 | }
|
---|
574 | else {
|
---|
575 | print $outhandle "Warning: Unsupported character encoding '$char_encoding' from locale '$current_locale'\n";
|
---|
576 | }
|
---|
577 | }
|
---|
578 |
|
---|
579 |
|
---|
580 | };
|
---|
581 | if ($@) {
|
---|
582 | print $outhandle "$@\n";
|
---|
583 | print $outhandle "Warning: Unable to establish locale. Will assume filesytem is UTF-8\n";
|
---|
584 |
|
---|
585 | }
|
---|
586 | return $filesystem_encoding;
|
---|
587 | }
|
---|
588 |
|
---|
589 | # is there ever only one Source? Sometimes this will be called twice, for images etc that are converted.
|
---|
590 | sub set_Source_metadata {
|
---|
591 | my $self = shift (@_);
|
---|
592 | my ($doc_obj, $filename_no_path, $file_encoding) = @_;
|
---|
593 |
|
---|
594 | my $top_section = $doc_obj->get_top_section();
|
---|
595 |
|
---|
596 | # the original encoding filename
|
---|
597 | $doc_obj->set_metadata_element($top_section, "Source", $filename_no_path);
|
---|
598 | # UTF-8 version of filename
|
---|
599 | my $filemeta = $self->filename_to_utf8_metadata($filename_no_path, $file_encoding);
|
---|
600 | $doc_obj->set_utf8_metadata_element($top_section, "SourceUTF8", $filemeta);
|
---|
601 |
|
---|
602 | }
|
---|
603 |
|
---|
604 | sub add_OID {
|
---|
605 |
|
---|
606 | my $self = shift (@_);
|
---|
607 | my ($doc_obj) = @_;
|
---|
608 |
|
---|
609 | # See if a metadata field is specified as the field
|
---|
610 | if ((defined $self->{'use_as_doc_identifier'}) && ($self->{'use_as_doc_identifier'} ne "")) {
|
---|
611 | my $metadata_doc_id = $self->{'use_as_doc_identifier'};
|
---|
612 |
|
---|
613 | # Consider "tidying" up metadata_doc_id to be something
|
---|
614 | # suitable in a URL
|
---|
615 | # Could even support a user specified plugin RE for this.
|
---|
616 |
|
---|
617 | my $top_section = $doc_obj->get_top_section();
|
---|
618 | my $oid = $doc_obj->get_metadata_element($top_section,$metadata_doc_id);
|
---|
619 | ## print STDERR "**** oid = $oid\n";
|
---|
620 | $doc_obj->set_OID($oid);
|
---|
621 | }
|
---|
622 | # See if there is a plugin-specific set_OID function...
|
---|
623 | elsif (defined ($self->can('set_OID'))) {
|
---|
624 | # it will need $doc_obj to set the Identifier metadata...
|
---|
625 | $self->set_OID(@_); # pass through any extra arguments supplied
|
---|
626 | } else {
|
---|
627 | # use the default set_OID() in doc.pm
|
---|
628 | $doc_obj->set_OID();
|
---|
629 | }
|
---|
630 | }
|
---|
631 |
|
---|
632 |
|
---|
633 |
|
---|
634 | # The BasePlugin read_into_doc_obj() function. This function does all the
|
---|
635 | # right things to make general options work for a given plugin. It doesn't do anything with the file other than setting reads in
|
---|
636 | # a file and sets up a slew of metadata all saved in doc_obj, which
|
---|
637 | # it then returns as part of a tuple (process_status,doc_obj)
|
---|
638 | #
|
---|
639 | # Much of this functionality used to reside in read, but it was broken
|
---|
640 | # down into a supporting routine to make the code more flexible.
|
---|
641 | #
|
---|
642 | # recursive plugins (e.g. RecPlug) and specialized plugins like those
|
---|
643 | # capable of processing many documents within a single file (e.g.
|
---|
644 | # GMLPlug) will normally want to implement their own version of
|
---|
645 | # read_into_doc_obj()
|
---|
646 | #
|
---|
647 | # Note that $base_dir might be "" and that $file might
|
---|
648 | # include directories
|
---|
649 |
|
---|
650 | # currently blocking has been done before it gets here - does this affect secondary plugin stuff??
|
---|
651 | sub read_into_doc_obj {
|
---|
652 | my $self = shift (@_);
|
---|
653 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
654 |
|
---|
655 | my $outhandle = $self->{'outhandle'};
|
---|
656 |
|
---|
657 | # should we move this to read? What about secondary plugins?
|
---|
658 | print STDERR "<Processing n='$file' p='$self->{'plugin_type'}'>\n" if ($gli);
|
---|
659 | print $outhandle "$self->{'plugin_type'} processing $file\n"
|
---|
660 | if $self->{'verbosity'} > 1;
|
---|
661 |
|
---|
662 | my ($filename_full_path, $filename_no_path) = $self->get_full_filenames($base_dir, $file);
|
---|
663 | # create a new document
|
---|
664 | my $doc_obj = new doc ($filename_full_path, "indexed_doc");
|
---|
665 | my $top_section = $doc_obj->get_top_section();
|
---|
666 |
|
---|
667 | # this should look at the plugin option too...
|
---|
668 | $doc_obj->set_OIDtype ($processor->{'OIDtype'}, $processor->{'OIDmetadata'});
|
---|
669 | $doc_obj->add_utf8_metadata($top_section, "Plugin", "$self->{'plugin_type'}");
|
---|
670 | $doc_obj->add_utf8_metadata($top_section, "FileSize", (-s $filename_full_path));
|
---|
671 |
|
---|
672 | $self->set_Source_metadata($doc_obj, $filename_no_path);
|
---|
673 |
|
---|
674 | # plugin specific stuff - what args do we need here??
|
---|
675 | unless (defined ($self->process($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
|
---|
676 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
---|
677 | return -1;
|
---|
678 | }
|
---|
679 |
|
---|
680 | # include any metadata passed in from previous plugins
|
---|
681 | # note that this metadata is associated with the top level section
|
---|
682 | my $section = $doc_obj->get_top_section();
|
---|
683 | # can we merge these two methods??
|
---|
684 | $self->add_associated_files($doc_obj, $filename_full_path);
|
---|
685 | $self->extra_metadata ($doc_obj, $section, $metadata);
|
---|
686 | $self->auto_extract_metadata($doc_obj);
|
---|
687 |
|
---|
688 | # if we haven't found any Title so far, assign one
|
---|
689 | # this was shifted to here from inside read()
|
---|
690 | $self->title_fallback($doc_obj,$section,$filename_no_path);
|
---|
691 |
|
---|
692 | $self->add_OID($doc_obj);
|
---|
693 |
|
---|
694 | return (1,$doc_obj);
|
---|
695 | }
|
---|
696 |
|
---|
697 | sub add_dummy_text {
|
---|
698 | my $self = shift(@_);
|
---|
699 | my ($doc_obj, $section) = @_;
|
---|
700 |
|
---|
701 | # add NoText metadata so we can hide this dummy text in format statements
|
---|
702 | $doc_obj->add_metadata($section, "NoText", "1");
|
---|
703 | $doc_obj->add_text($section, &gsprintf::lookup_string("{BasePlugin.dummy_text}",1));
|
---|
704 |
|
---|
705 | }
|
---|
706 |
|
---|
707 | # does nothing. Can be overridden by subclass
|
---|
708 | sub auto_extract_metadata {
|
---|
709 | my $self = shift(@_);
|
---|
710 | my ($doc_obj) = @_;
|
---|
711 | }
|
---|
712 |
|
---|
713 | # adds cover image, associate_file options stuff. Should be called by sub class
|
---|
714 | # read_into_doc_obj
|
---|
715 | sub add_associated_files {
|
---|
716 | my $self = shift(@_);
|
---|
717 | # whatis filename??
|
---|
718 | my ($doc_obj, $filename) = @_;
|
---|
719 |
|
---|
720 | # add in the cover image
|
---|
721 | if ($self->{'cover_image'}) {
|
---|
722 | $self->associate_cover_image($doc_obj, $filename);
|
---|
723 | }
|
---|
724 |
|
---|
725 |
|
---|
726 | }
|
---|
727 |
|
---|
728 | # The BasePlugin read() function. This function calls read_into_doc_obj()
|
---|
729 | # to ensure all the right things to make general options work for a
|
---|
730 | # given plugin are done. It then calls the process() function which
|
---|
731 | # does all the work specific to a plugin (like the old read functions
|
---|
732 | # used to do). Most plugins should define their own process() function
|
---|
733 | # and let this read() function keep control.
|
---|
734 | #
|
---|
735 | # recursive plugins (e.g. RecPlug) and specialized plugins like those
|
---|
736 | # capable of processing many documents within a single file (e.g.
|
---|
737 | # GMLPlug) might want to implement their own version of read(), but
|
---|
738 | # more likely need to implement their own version of read_into_doc_obj()
|
---|
739 | #
|
---|
740 | # Return number of files processed, undef if can't recognise, -1 if can't
|
---|
741 | # process
|
---|
742 |
|
---|
743 | sub read {
|
---|
744 | my $self = shift (@_);
|
---|
745 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
746 |
|
---|
747 | # check that we are not blocked
|
---|
748 | my ($block_status,$filename) = $self->read_block(@_);
|
---|
749 | return $block_status if ((!defined $block_status) || ($block_status==0));
|
---|
750 |
|
---|
751 | my ($process_status,$doc_obj) = $self->read_into_doc_obj(@_);
|
---|
752 |
|
---|
753 | if ((defined $process_status) && ($process_status == 1)) {
|
---|
754 |
|
---|
755 | # process the document
|
---|
756 | $processor->process($doc_obj);
|
---|
757 |
|
---|
758 | $self->{'num_processed'} ++;
|
---|
759 | undef $doc_obj;
|
---|
760 | }
|
---|
761 | # delete any temp files that we may have created
|
---|
762 | $self->clean_up_after_doc_obj_processing();
|
---|
763 |
|
---|
764 | # if process_status == 1, then the file has been processed.
|
---|
765 | return $process_status;
|
---|
766 |
|
---|
767 | }
|
---|
768 |
|
---|
769 | # returns undef if file is rejected by the plugin
|
---|
770 | sub process {
|
---|
771 | my $self = shift (@_);
|
---|
772 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
|
---|
773 |
|
---|
774 | gsprintf(STDERR, "BasePlugin::process {common.must_be_implemented}\n") && die "\n";
|
---|
775 | # die "BasePlugin::process function must be implemented in sub-class\n";
|
---|
776 |
|
---|
777 | return undef; # never gets here
|
---|
778 | }
|
---|
779 |
|
---|
780 | # overwrite this method to delete any temp files that we have created
|
---|
781 | sub clean_up_after_doc_obj_processing {
|
---|
782 | my $self = shift(@_);
|
---|
783 |
|
---|
784 | }
|
---|
785 | # write_file -- used by ConvertToPlug, for example in post processing
|
---|
786 | #
|
---|
787 | # where should this go, is here the best place??
|
---|
788 | sub utf8_write_file {
|
---|
789 | my $self = shift (@_);
|
---|
790 | my ($textref, $filename) = @_;
|
---|
791 |
|
---|
792 | if (!open (FILE, ">$filename")) {
|
---|
793 | gsprintf(STDERR, "ConvertToPlug::write_file {ConvertToPlug.could_not_open_for_writing} ($!)\n", $filename);
|
---|
794 | die "\n";
|
---|
795 | }
|
---|
796 | print FILE $$textref;
|
---|
797 |
|
---|
798 | close FILE;
|
---|
799 | }
|
---|
800 |
|
---|
801 |
|
---|
802 | sub filename_based_title
|
---|
803 | {
|
---|
804 | my $self = shift (@_);
|
---|
805 | my ($file) = @_;
|
---|
806 |
|
---|
807 | my $file_derived_title = $file;
|
---|
808 | $file_derived_title =~ s/_/ /g;
|
---|
809 | $file_derived_title =~ s/\..*?$//;
|
---|
810 |
|
---|
811 | return $file_derived_title;
|
---|
812 | }
|
---|
813 |
|
---|
814 |
|
---|
815 | sub title_fallback
|
---|
816 | {
|
---|
817 | my $self = shift (@_);
|
---|
818 | my ($doc_obj,$section,$file) = @_;
|
---|
819 |
|
---|
820 | if (!defined $doc_obj->get_metadata_element ($section, "Title") or $doc_obj->get_metadata_element($section, "Title") eq "") {
|
---|
821 |
|
---|
822 | my $file_derived_title = $self->filename_to_utf8_metadata($self->filename_based_title($file));
|
---|
823 | if (!defined $doc_obj->get_metadata_element ($section, "Title")) {
|
---|
824 | $doc_obj->add_utf8_metadata ($section, "Title", $file_derived_title);
|
---|
825 | }
|
---|
826 | else {
|
---|
827 | $doc_obj->set_utf8_metadata ($section, "Title", $file_derived_title);
|
---|
828 | }
|
---|
829 | }
|
---|
830 |
|
---|
831 | }
|
---|
832 |
|
---|
833 | # add any extra metadata that's been passed around from one
|
---|
834 | # plugin to another.
|
---|
835 | # extra_metadata uses add_utf8_metadata so it expects metadata values
|
---|
836 | # to already be in utf8
|
---|
837 | sub extra_metadata {
|
---|
838 | my $self = shift (@_);
|
---|
839 | my ($doc_obj, $cursection, $metadata) = @_;
|
---|
840 |
|
---|
841 | my $associate_tail_re = $self->{'associate_tail_re'};
|
---|
842 |
|
---|
843 | foreach my $field (keys(%$metadata)) {
|
---|
844 | # $metadata->{$field} may be an array reference
|
---|
845 | if ($field eq "gsdlassocfile_tobe") {
|
---|
846 | # 'gsdlassocfile_tobe' is artificially introduced metadata
|
---|
847 | # that is used to signal that certain additional files should
|
---|
848 | # be tied to this document. Useful in situations where a
|
---|
849 | # metadata pass in the plugin pipeline works out some files
|
---|
850 | # need to be associated with a document, but the document hasn't
|
---|
851 | # been formed yet.
|
---|
852 |
|
---|
853 | my $equiv_form = "";
|
---|
854 | foreach my $gaf (@{$metadata->{$field}}) {
|
---|
855 | my ($full_filename,$mimetype) = ($gaf =~ m/^(.*):(.*):$/);
|
---|
856 | my ($tail_filename) = ($full_filename =~ /^.*[\/\\](.+?)$/);
|
---|
857 | my $filename = $full_filename;
|
---|
858 |
|
---|
859 | $doc_obj->associate_file($full_filename,$tail_filename,$mimetype);
|
---|
860 |
|
---|
861 | # work out extended tail extension (i.e. matching tail re)
|
---|
862 |
|
---|
863 | my ($file_prefix,$file_extended_ext)
|
---|
864 | = $self->root_ext_split($tail_filename,$associate_tail_re);
|
---|
865 | my ($pre_doc_ext) = ($file_extended_ext =~ m/^(.*)\..*$/);
|
---|
866 |
|
---|
867 | my ($doc_ext) = ($tail_filename =~ m/^.*\.(.*)$/);
|
---|
868 | my $start_doclink = "<a href=\"_httpprefix_/collect/[collection]/index/assoc/{Or}{[parent(Top):archivedir],[archivedir]}/$tail_filename\">";
|
---|
869 | my $srcicon = "_icon".$doc_ext."_";
|
---|
870 | my $end_doclink = "</a>";
|
---|
871 |
|
---|
872 | my $assoc_form = "$start_doclink\{If\}{$srcicon,$srcicon,$doc_ext\}$end_doclink";
|
---|
873 |
|
---|
874 | if (defined $pre_doc_ext) {
|
---|
875 | # for metadata such as [mp3._edited] [mp3._full] ...
|
---|
876 | $doc_obj->add_utf8_metadata ($cursection, "$doc_ext.$pre_doc_ext", $assoc_form);
|
---|
877 | }
|
---|
878 |
|
---|
879 | # for multiple metadata such as [mp3.assoclink]
|
---|
880 | $doc_obj->add_utf8_metadata ($cursection, "$doc_ext.assoclink", $assoc_form);
|
---|
881 |
|
---|
882 | $equiv_form .= " $assoc_form";
|
---|
883 | }
|
---|
884 | $doc_obj->add_utf8_metadata ($cursection, "equivlink", $equiv_form);
|
---|
885 | }
|
---|
886 | elsif (ref ($metadata->{$field}) eq "ARRAY") {
|
---|
887 | map {
|
---|
888 | $doc_obj->add_utf8_metadata ($cursection, $field, $_);
|
---|
889 | } @{$metadata->{$field}};
|
---|
890 | } else {
|
---|
891 | $doc_obj->add_utf8_metadata ($cursection, $field, $metadata->{$field});
|
---|
892 | }
|
---|
893 | }
|
---|
894 | }
|
---|
895 |
|
---|
896 |
|
---|
897 | sub compile_stats {
|
---|
898 | my $self = shift(@_);
|
---|
899 | my ($stats) = @_;
|
---|
900 |
|
---|
901 | $stats->{'num_processed'} += $self->{'num_processed'};
|
---|
902 | $stats->{'num_not_processed'} += $self->{'num_not_processed'};
|
---|
903 | $stats->{'num_archives'} += $self->{'num_archives'};
|
---|
904 |
|
---|
905 | }
|
---|
906 |
|
---|
907 | sub associate_cover_image {
|
---|
908 | my $self = shift;
|
---|
909 | my ($doc_obj, $filename) = @_;
|
---|
910 |
|
---|
911 | $filename =~ s/\.[^\\\/\.]+$/\.jpg/;
|
---|
912 | if (exists $self->{'covers_missing_cache'}->{$filename}) {
|
---|
913 | # don't stat() for existence eg for multiple document input files
|
---|
914 | # (eg SplitPlug)
|
---|
915 | return;
|
---|
916 | }
|
---|
917 |
|
---|
918 | my $top_section=$doc_obj->get_top_section();
|
---|
919 |
|
---|
920 | if (-e $filename) {
|
---|
921 | $doc_obj->associate_file($filename, "cover.jpg", "image/jpeg");
|
---|
922 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
---|
923 | } else {
|
---|
924 | my $upper_filename = $filename;
|
---|
925 | $upper_filename =~ s/jpg$/JPG/;
|
---|
926 | if (-e $upper_filename) {
|
---|
927 | $doc_obj->associate_file($upper_filename, "cover.jpg",
|
---|
928 | "image/jpeg");
|
---|
929 | $doc_obj->add_utf8_metadata($top_section, "hascover", 1);
|
---|
930 | } else {
|
---|
931 | # file doesn't exist, so record the fact that it's missing so
|
---|
932 | # we don't stat() again (stat is slow)
|
---|
933 | $self->{'covers_missing_cache'}->{$filename} = 1;
|
---|
934 | }
|
---|
935 | }
|
---|
936 |
|
---|
937 | }
|
---|
938 |
|
---|
939 |
|
---|
940 | # Overridden by exploding plugins (eg. ISISPlug)
|
---|
941 | sub clean_up_after_exploding
|
---|
942 | {
|
---|
943 | my $self = shift(@_);
|
---|
944 | }
|
---|
945 |
|
---|
946 |
|
---|
947 | 1;
|
---|