- #!/usr/bin/perl
- # xapian-omega search engine plugin
- package IkiWiki::Plugin::search;
- use warnings;
- use strict;
- use IkiWiki 2.00;
- sub import { #{{{
- hook(type => "checkconfig", id => "search", call => \&checkconfig);
- hook(type => "pagetemplate", id => "search", call => \&pagetemplate);
- # run last so other needsbuild hooks can modify the list
- hook(type => "needsbuild", id => "search", call => \&needsbuild,
- last => 1);
- hook(type => "filter", id => "search", call => \&filter);
- hook(type => "delete", id => "search", call => \&delete);
- hook(type => "cgi", id => "search", call => \&cgi);
- } # }}}
- sub checkconfig () { #{{{
- foreach my $required (qw(url cgiurl)) {
- if (! length $config{$required}) {
- error(sprintf(gettext("Must specify %s when using the search plugin"), $required));
- }
- }
- if (! exists $config{omega_cgi}) {
- $config{omega_cgi}="/usr/lib/cgi-bin/omega/omega";
- }
-
- if (! -e $config{wikistatedir}."/xapian" || $config{rebuild}) {
- writefile("omega.conf", $config{wikistatedir}."/xapian",
- "database_dir .\n".
- "template_dir ./templates\n");
- writefile("query", $config{wikistatedir}."/xapian/templates",
- IkiWiki::misctemplate(gettext("search"),
- readfile(IkiWiki::template_file("searchquery.tmpl"))));
- }
- } #}}}
- my $form;
- sub pagetemplate (@) { #{{{
- my %params=@_;
- my $page=$params{page};
- my $template=$params{template};
- # Add search box to page header.
- if ($template->query(name => "searchform")) {
- if (! defined $form) {
- my $searchform = template("searchform.tmpl", blind_cache => 1);
- $searchform->param(searchaction => $config{cgiurl});
- $form=$searchform->output;
- }
- $template->param(searchform => $form);
- }
- } #}}}
- my %toindex;
- sub needsbuild ($) { #{{{
- %toindex = map { pagename($_) => 1 } @{shift()};
- } #}}}
- sub filter (@) { #{{{
- my %params=@_;
-
- if ($params{page} eq $params{destpage} && $toindex{$params{page}}) {
- # index page
- my $db=xapiandb();
- my $doc=Search::Xapian::Document->new();
- my $title=$params{page};
- if (exists $pagestate{$params{page}}{meta} &&
- exists $pagestate{$params{page}}{meta}{title}) {
- $title=$pagestate{$params{page}}{meta}{title};
- }
- # data used by omega
- $doc->set_data(
- "url=".urlto($params{page}, "")."\n".
- "sample=\n". # TODO
- "caption=$title\n".
- "modtime=$IkiWiki::pagemtime{$params{page}}\n".
- "size=".length($params{content})."\n"
- );
- my $tg = Search::Xapian::TermGenerator->new();
- $tg->set_stemmer(new Search::Xapian::Stem("english"));
- $tg->set_document($doc);
- $tg->index_text($params{page}, 2);
- $tg->index_text($title, 2);
- $tg->index_text($params{content}); # TODO html strip; preprocessor too
- my $pageterm=pageterm($params{page});
- $doc->add_term($pageterm);
- $db->replace_document_by_term($pageterm, $doc);
- }
- return $params{content};
- } #}}}
- sub delete (@) { #{{{
- my $db=xapiandb();
- foreach my $page (@_) {
- $db->delete_document_by_term(pageterm($page));
- }
- } #}}}
- sub cgi ($) { #{{{
- my $cgi=shift;
- if (defined $cgi->param('P')) {
- # only works for GET requests
- chdir("$config{wikistatedir}/xapian") || error("chdir: $!");
- $ENV{OMEGA_CONFIG_FILE}="./omega.conf";
- $ENV{CGIURL}=$config{cgiurl},
- exec($config{omega_cgi}) || error("$config{omega_cgi} failed: $!");
- }
- } #}}}
- sub pageterm ($) { #{{{
- my $page=shift;
- # TODO: check if > 255 char page names overflow term
- # length; use sha1 if so?
- return "P".$page;
- } #}}}
- my $db;
- sub xapiandb () { #{{{
- if (! defined $db) {
- eval q{
- use Search::Xapian;
- use Search::Xapian::WritableDatabase;
- };
- error($@) if $@;
- $db=Search::Xapian::WritableDatabase->new($config{wikistatedir}."/xapian/default",
- Search::Xapian::DB_CREATE_OR_OPEN());
- }
- return $db;
- } #}}}
- 1
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