IkiWiki/Plugin/meta.pm

   1 #!/usr/bin/perl
   2 # Ikiwiki metadata plugin.
   3 package IkiWiki::Plugin::meta;
   4
   5 use warnings;
   6 use strict;
   7 use IkiWiki;
   8
   9 my %meta;
  10 my %title;
  11 my %permalink;
  12 my %author;
  13 my %authorurl;
  14
  15 sub import { #{{{
  16         hook(type => "preprocess", id => "meta", call => \&preprocess);
  17         hook(type => "filter", id => "meta", call => \&filter);
  18         hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
  19 } # }}}
  20
  21 sub filter (@) { #{{{
  22         my %params=@_;
  23
  24         $meta{$params{page}}='';
  25
  26         return $params{content};
  27 } # }}}
  28
  29 sub preprocess (@) { #{{{
  30         if (! @_) {
  31                 return "";
  32         }
  33         my %params=@_;
  34         my $key=shift;
  35         my $value=$params{$key};
  36         delete $params{$key};
  37         my $page=$params{page};
  38         delete $params{page};
  39         delete $params{destpage};
  40
  41         eval q{use HTML::Entities};
  42         # Always dencode, even if encoding later, since it might not be
  43         # fully encoded.
  44         $value=decode_entities($value);
  45
  46         if ($key eq 'link') {
  47                 if (%params) {
  48                         $meta{$page}.="<link href=\"".encode_entities($value)."\" ".
  49                                 join(" ", map { encode_entities($_)."=\"".encode_entities(decode_entities($params{$_}))."\"" } keys %params).
  50                                 " />\n";
  51                 }
  52                 else {
  53                         # hidden WikiLink
  54                         push @{$links{$page}}, $value;
  55                 }
  56         }
  57         elsif ($key eq 'title') {
  58                 $title{$page}=$value;
  59         }
  60         elsif ($key eq 'permalink') {
  61                 $permalink{$page}=$value;
  62                 $meta{$page}.="<link rel=\"bookmark\" href=\"".encode_entities($value)."\" />\n";
  63         }
  64         else {
  65                 $meta{$page}.="<meta name=\"".encode_entities($key).
  66                         "\" content=\"".encode_entities($value)."\" />\n";
  67                 if ($key eq 'author') {
  68                         $author{$page}=$value;
  69                 }
  70                 elsif ($key eq 'authorurl') {
  71                         $authorurl{$page}=$value;
  72                 }
  73         }
  74
  75         return "";
  76 } # }}}
  77
  78 sub pagetemplate (@) { #{{{
  79         my %params=@_;
  80         my $page=$params{page};
  81         my $template=$params{template};
  82
  83         $template->param(meta => $meta{$page})
  84                 if exists $meta{$page} && $template->query(name => "meta");
  85         if (exists $title{$page} && $template->query(name => "title")) {
  86                 $template->param(title => $title{$page});
  87                 $template->param(title_overridden => 1);
  88         }
  89         $template->param(permalink => $permalink{$page})
  90                 if exists $permalink{$page} && $template->query(name => "permalink");
  91         $template->param(author => $author{$page})
  92                 if exists $author{$page} && $template->query(name => "author");
  93         $template->param(authorurl => $authorurl{$page})
  94                 if exists $authorurl{$page} && $template->query(name => "authorurl");
  95
  96 } # }}}
  97
  98 1