first pass at doing xapian indexing

[ikiwiki.git] / IkiWiki / Plugin / search.pm

diff --git a/IkiWiki/Plugin/search.pm b/IkiWiki/Plugin/search.pm
index e705d018af908d73b36269dd0894b350a31b90a2..a28d58a1d4b5403583d0cd5207f6c7bf2ada0183 100644 (file)
--- a/IkiWiki/Plugin/search.pm
+++ b/IkiWiki/Plugin/search.pm
@@ -9,8 +9,11 @@ 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 => "change", id => "search", call => \&change);
        hook(type => "cgi", id => "search", call => \&cgi);
 } # }}}
 
@@ -53,12 +56,53 @@ sub pagetemplate (@) { #{{{
        }
 } #}}}
 
-sub delete (@) { #{{{
-       debug(gettext("cleaning xapian search index"));
+my %toindex;
+sub needsbuild ($) { #{{{
+       %toindex = map { $_ => 1 } @{shift()};
 } #}}}
 
-sub change (@) { #{{{
-       debug(gettext("updating xapian search index"));
+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 ($) { #{{{
@@ -73,4 +117,26 @@ sub cgi ($) { #{{{
        }
 } #}}}
 
+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