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