| 1 | ###########################################################################
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| 2 | #
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| 3 | # plugin.pm -- functions to handle using 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 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 plugin;
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| 27 |
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| 28 | use strict; # to pick up typos and undeclared variables...
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| 29 | no strict 'refs'; # ...but allow filehandles to be variables and vice versa
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| 30 | no strict 'subs';
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| 31 |
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| 32 | require util;
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| 33 | use gsprintf 'gsprintf';
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| 34 |
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| 35 | # mapping from old plugin names to new ones for backwards compatibility
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| 36 | # can remove at sometime in future when we no longer want to support old xxPlug plugins
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| 37 | my $plugin_name_map = {
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| 38 | 'ArcPlug' => 'ArchivesInfPlugin',
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| 39 | 'RecPlug' => 'DirectoryPlugin',
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| 40 | 'TEXTPlug' => 'TextPlugin',
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| 41 | 'EMAILPlug' => 'EmailPlugin',
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| 42 | 'SRCPlug' => 'SourceCodePlugin',
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| 43 | 'NULPlug' => 'NulPlugin',
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| 44 | 'W3ImgPlug' => 'W3ImagePlugin',
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| 45 | 'PagedImgPlug' => 'PagedImagePlugin'
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| 46 | };
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| 47 |
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| 48 | # global variables
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| 49 | my $stats = {'num_processed' => 0,
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| 50 | 'num_blocked' => 0,
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| 51 | 'num_not_processed' => 0,
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| 52 | 'num_not_recognised' => 0,
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| 53 | 'num_archives' => 0
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| 54 | };
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| 55 |
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| 56 | #globaloptions contains any options that should be passed to all plugins
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| 57 | my ($verbosity, $outhandle, $failhandle, $globaloptions);
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| 58 |
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| 59 | sub get_valid_pluginname {
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| 60 | my ($pluginname) = @_;
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| 61 | my $valid_name = $pluginname;
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| 62 | if (defined $plugin_name_map->{$pluginname}) {
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| 63 | $valid_name = $plugin_name_map->{$pluginname};
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| 64 | } elsif ($pluginname =~ /Plug$/) {
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| 65 | $valid_name =~ s/Plug/Plugin/;
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| 66 |
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| 67 | }
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| 68 | return $valid_name;
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| 69 | }
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| 70 | sub load_plugin_require
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| 71 | {
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| 72 | my ($pluginname) = @_;
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| 73 |
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| 74 | my @check_list = ();
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| 75 |
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| 76 | # pp_plugname shorthand for 'perllib' 'plugin' '$pluginname.pm'
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| 77 | my $pp_plugname
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| 78 | = &util::filename_cat('perllib', 'plugins', "${pluginname}.pm");
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| 79 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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| 80 |
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| 81 | # find the plugin
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| 82 | if (defined($ENV{'GSDLCOLLECTION'}))
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| 83 | {
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| 84 | my $customplugname
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| 85 | = &util::filename_cat($collectdir, "custom",$ENV{'GSDLCOLLECTION'},
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| 86 | $pp_plugname);
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| 87 | push(@check_list,$customplugname);
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| 88 | }
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| 89 |
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| 90 | my $colplugname = &util::filename_cat($collectdir, $pp_plugname);
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| 91 | push(@check_list,$colplugname);
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| 92 |
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| 93 | if (defined $ENV{'GSDLEXTS'}) {
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| 94 |
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| 95 | my $ext_prefix = &util::filename_cat($ENV{'GSDLHOME'}, "ext");
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| 96 |
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| 97 | my @extensions = split(/:/,$ENV{'GSDLEXTS'});
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| 98 | foreach my $e (@extensions) {
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| 99 | my $extplugname = &util::filename_cat($ext_prefix, $e, $pp_plugname);
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| 100 | push(@check_list,$extplugname);
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| 101 |
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| 102 | }
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| 103 | }
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| 104 |
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| 105 |
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| 106 | my $mainplugname = &util::filename_cat($ENV{'GSDLHOME'}, $pp_plugname);
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| 107 | push(@check_list,$mainplugname);
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| 108 |
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| 109 | my $success=0;
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| 110 | foreach my $plugname (@check_list) {
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| 111 | if (-e $plugname) {
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| 112 | require $plugname;
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| 113 | $success=1;
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| 114 | last;
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | if (!$success) {
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| 119 | &gsprintf(STDERR, "{plugin.could_not_find_plugin}\n",
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| 120 | $pluginname);
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| 121 | die "\n";
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| 122 | }
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| 123 | }
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| 124 |
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| 125 | sub load_plugin_for_info {
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| 126 | my ($pluginname) = shift @_;
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| 127 | $pluginname = &get_valid_pluginname($pluginname);
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| 128 | load_plugin_require($pluginname);
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| 129 |
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| 130 | # create a plugin object
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| 131 | my ($plugobj);
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| 132 | my $options = "-gsdlinfo";
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| 133 |
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| 134 | eval ("\$plugobj = new \$pluginname([],[$options])");
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| 135 | die "$@" if $@;
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| 136 |
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| 137 | return $plugobj;
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| 138 | }
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| 139 |
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| 140 | sub load_plugins {
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| 141 | my ($plugin_list) = shift @_;
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| 142 | my $incremental;
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| 143 | ($verbosity, $outhandle, $failhandle, $globaloptions, $incremental) = @_; # globals
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| 144 | my @plugin_objects = ();
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| 145 | $incremental = 0 unless (defined $incremental && $incremental == 1);
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| 146 | $verbosity = 2 unless defined $verbosity;
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| 147 | $outhandle = 'STDERR' unless defined $outhandle;
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| 148 | $failhandle = 'STDERR' unless defined $failhandle;
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| 149 |
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| 150 | my $colplugindir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"perllib/plugins");
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| 151 | unshift (@INC, $colplugindir);
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| 152 |
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| 153 | map { $_ = "\"$_\""; } @$globaloptions;
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| 154 | my $globals = join (",", @$globaloptions);
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| 155 |
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| 156 | foreach my $pluginoptions (@$plugin_list) {
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| 157 | my $pluginname = shift @$pluginoptions;
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| 158 | next unless defined $pluginname;
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| 159 | $pluginname = &get_valid_pluginname($pluginname);
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| 160 | load_plugin_require($pluginname);
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| 161 |
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| 162 | # create a plugin object
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| 163 | my ($plugobj);
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| 164 | map { $_ = "\"$_\""; } @$pluginoptions;
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| 165 | my $options = join (",", @$pluginoptions);
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| 166 | if ($globals) {
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| 167 | if (@$pluginoptions) {
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| 168 | $options .= ",";
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| 169 | }
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| 170 | $options .= "$globals";
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| 171 | }
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| 172 | $options =~ s/\$/\\\$/g;
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| 173 |
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| 174 | eval ("\$plugobj = new \$pluginname([],[$options])");
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| 175 | die "$@" if $@;
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| 176 |
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| 177 | # initialize plugin
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| 178 | $plugobj->init($verbosity, $outhandle, $failhandle);
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| 179 |
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| 180 | $plugobj->set_incremental($incremental);
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| 181 |
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| 182 | # add this object to the list
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| 183 | push (@plugin_objects, $plugobj);
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| 184 | }
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| 185 |
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| 186 | return \@plugin_objects;
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| 187 | }
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| 188 |
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| 189 |
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| 190 | sub begin {
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| 191 | my ($pluginfo, $base_dir, $processor, $maxdocs, $gli) = @_;
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| 192 |
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| 193 | map { $_->{'gli'} = $gli; } @$pluginfo;
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| 194 | map { $_->begin($pluginfo, $base_dir, $processor, $maxdocs); } @$pluginfo;
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| 195 | }
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| 196 |
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| 197 |
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| 198 | sub metadata_read {
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| 199 | my ($pluginfo, $base_dir, $file, $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli, $aux) = @_;
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| 200 |
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| 201 | $maxdocs = -1 unless defined $maxdocs && $maxdocs =~ /\d/;
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| 202 | $gli = 0 unless defined $gli;
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| 203 |
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| 204 | my $rv = 0;
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| 205 | my $glifile = $file;
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| 206 |
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| 207 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 208 |
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| 209 | # Announce to GLI that we are handling a file
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| 210 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 211 |
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| 212 | # the .kill file is a handy (if not very elegant) way of aborting
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| 213 | # an import.pl or buildcol.pl process
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| 214 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 215 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 216 | die "\n";
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| 217 | }
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| 218 |
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| 219 | my $had_error = 0;
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| 220 | # pass this file by each of the plugins in turn until one
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| 221 | # is found which will process it
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| 222 | # read must return:
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| 223 | # undef - could not recognise
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| 224 | # -1 - tried but error
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| 225 | # 0 - blocked
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| 226 | # anything else for successful processing
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| 227 |
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| 228 | foreach my $plugobj (@$pluginfo) {
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| 229 |
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| 230 | $rv = $plugobj->metadata_read($pluginfo, $base_dir, $file,
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| 231 | $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli, $aux);
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| 232 |
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| 233 | if (defined $rv) {
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| 234 | if ($rv == -1) {
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| 235 | # an error has occurred
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| 236 | $had_error = 1;
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| 237 | print STDERR "<ProcessingError n='$glifile'>\n" if $gli;
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| 238 | } else {
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| 239 | return $rv;
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| 240 | }
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| 241 | } # else undefined - was not recognised by the plugin
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| 242 | }
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| 243 |
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| 244 | return 0;
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| 245 | }
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| 246 |
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| 247 | sub read {
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| 248 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli, $aux) = @_;
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| 249 |
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| 250 | $maxdocs = -1 unless defined $maxdocs && $maxdocs =~ /\d/;
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| 251 | $total_count = 0 unless defined $total_count && $total_count =~ /\d/;
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| 252 | $gli = 0 unless defined $gli;
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| 253 |
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| 254 | my $rv = 0;
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| 255 | my $glifile = $file;
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| 256 |
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| 257 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 258 |
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| 259 | # Announce to GLI that we are handling a file
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| 260 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 261 |
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| 262 | # the .kill file is a handy (if not very elegant) way of aborting
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| 263 | # an import.pl or buildcol.pl process
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| 264 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 265 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 266 | die "\n";
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| 267 | }
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| 268 |
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| 269 | my $had_error = 0;
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| 270 | # pass this file by each of the plugins in turn until one
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| 271 | # is found which will process it
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| 272 | # read must return:
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| 273 | # undef - could not recognise
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| 274 | # -1 - tried but error
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| 275 | # 0 - blocked
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| 276 | # anything else for successful processing
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| 277 |
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| 278 | foreach my $plugobj (@$pluginfo) {
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| 279 |
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| 280 | $rv = $plugobj->read($pluginfo, $base_dir, $file,
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| 281 | $metadata, $processor, $maxdocs, $total_count, $gli, $aux);
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| 282 |
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| 283 | if (defined $rv) {
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| 284 | if ($rv == -1) {
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| 285 | # an error has occurred
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| 286 | $had_error = 1;
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| 287 | } else {
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| 288 | return $rv;
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| 289 | }
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| 290 | } # else undefined - was not recognised by the plugin
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| 291 | }
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| 292 |
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| 293 | if ($had_error) {
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| 294 | # was recognised but couldn't be processed
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| 295 | if ($verbosity >= 2) {
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| 296 | gsprintf($outhandle, "{plugin.no_plugin_could_process}\n", $file);
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| 297 | }
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| 298 | # tell the GLI that it was not processed
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| 299 | print STDERR "<NonProcessedFile n='$glifile'>\n" if $gli;
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| 300 |
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| 301 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_process_this_file}\n");
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| 302 | $stats->{'num_not_processed'} ++;
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| 303 | } else {
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| 304 | # was not recognised
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| 305 | if ($verbosity >= 2) {
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| 306 | gsprintf($outhandle, "{plugin.no_plugin_could_recognise}\n",$file);
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| 307 | }
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| 308 | # tell the GLI that it was not processed
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| 309 | print STDERR "<NonRecognisedFile n='$glifile'>\n" if $gli;
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| 310 |
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| 311 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_recognise_this_file}\n");
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| 312 | $stats->{'num_not_recognised'} ++;
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| 313 | }
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| 314 | return 0;
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| 315 | }
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| 316 |
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| 317 | # write out some general stats that the plugins have compiled - note that
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| 318 | # the buildcol.pl process doesn't currently call this process so the stats
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| 319 | # are only output after import.pl -
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| 320 | sub write_stats {
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| 321 | my ($pluginfo, $statshandle, $faillog, $gli) = @_;
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| 322 |
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| 323 | $gli = 0 unless defined $gli;
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| 324 |
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| 325 | foreach my $plugobj (@$pluginfo) {
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| 326 | $plugobj->compile_stats($stats);
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| 327 | }
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| 328 |
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| 329 | my $total = $stats->{'num_processed'} + $stats->{'num_blocked'} +
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| 330 | $stats->{'num_not_processed'} + $stats->{'num_not_recognised'};
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| 331 |
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| 332 | print STDERR "<ImportComplete considered='$total' processed='$stats->{'num_processed'}' blocked='$stats->{'num_blocked'}' ignored='$stats->{'num_not_recognised'}' failed='$stats->{'num_not_processed'}'>\n" if $gli;
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| 333 |
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| 334 | if ($total == 1) {
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| 335 | gsprintf($statshandle, "* {plugin.one_considered}\n");
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| 336 | } else {
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| 337 | gsprintf($statshandle, "* {plugin.n_considered}\n", $total);
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| 338 | }
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| 339 | if ($stats->{'num_archives'}) {
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| 340 | if ($stats->{'num_archives'} == 1) {
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| 341 | gsprintf($statshandle, " ({plugin.including_archive})\n");
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| 342 | }
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| 343 | else {
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| 344 | gsprintf($statshandle, " ({plugin.including_archives})\n",
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| 345 | $stats->{'num_archives'});
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| 346 | }
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| 347 | }
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| 348 | if ($stats->{'num_processed'} == 1) {
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| 349 | gsprintf($statshandle, "* {plugin.one_included}\n");
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| 350 | } else {
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| 351 | gsprintf($statshandle, "* {plugin.n_included}\n", $stats->{'num_processed'});
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| 352 | }
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| 353 | if ($stats->{'num_not_recognised'}) {
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| 354 | if ($stats->{'num_not_recognised'} == 1) {
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| 355 | gsprintf($statshandle, "* {plugin.one_unrecognised}\n");
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| 356 | } else {
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| 357 | gsprintf($statshandle, "* {plugin.n_unrecognised}\n",
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| 358 | $stats->{'num_not_recognised'});
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| 359 | }
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| 360 |
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| 361 | }
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| 362 | if ($stats->{'num_not_processed'}) {
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| 363 | if ($stats->{'num_not_processed'} == 1) {
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| 364 | gsprintf($statshandle, "* {plugin.one_rejected}\n");
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| 365 | } else {
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| 366 | gsprintf($statshandle, "* {plugin.n_rejected}\n",
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| 367 | $stats->{'num_not_processed'});
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| 368 | }
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| 369 | }
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| 370 | if ($stats->{'num_not_processed'} || $stats->{'num_not_recognised'}) {
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| 371 | gsprintf($statshandle, " {plugin.see_faillog}\n", $faillog);
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| 372 | }
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| 373 | }
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| 374 |
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| 375 | sub end {
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| 376 | my ($pluginfo, $processor) = @_;
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| 377 | map { $_->end($processor); } @$pluginfo;
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| 378 | }
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| 379 |
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| 380 | sub deinit {
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| 381 | my ($pluginfo, $processor) = @_;
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| 382 |
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| 383 |
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| 384 | map { $_->deinit($processor); } @$pluginfo;
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| 385 | }
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| 386 |
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| 387 | 1;
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