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 2.00;
   8
   9 my %meta;
  10 my %title;
  11 my %permalink;
  12 my %author;
  13 my %authorurl;
  14 my %license;
  15 my %copyright;
  16
  17 sub import { #{{{
  18         hook(type => "needsbuild", id => "meta", call => \&needsbuild);
  19         hook(type => "preprocess", id => "meta", call => \&preprocess);
  20         hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
  21 } # }}}
  22
  23 sub needsbuild (@) { #{{{
  24         my $needsbuild=shift;
  25         foreach my $page (keys %pagestate) {
  26                 if (exists $pagestate{$page}{meta}) {
  27                         if (grep { $_ eq $pagesources{$page} } @$needsbuild) {
  28                                 # remove state, it will be re-added
  29                                 # if the preprocessor directive is still
  30                                 # there during the rebuild
  31                                 delete $pagestate{$page}{meta};
  32                         }
  33                 }
  34         }
  35 }
  36
  37 sub scrub ($) { #{{{
  38         if (IkiWiki::Plugin::htmlscrubber->can("sanitize")) {
  39                 return IkiWiki::Plugin::htmlscrubber::sanitize(content => shift);
  40         }
  41         else {
  42                 return shift;
  43         }
  44 } #}}}
  45
  46 sub preprocess (@) { #{{{
  47         return "" unless @_;
  48         my %params=@_;
  49         my $key=shift;
  50         my $value=$params{$key};
  51         delete $params{$key};
  52         my $page=$params{page};
  53         delete $params{page};
  54         my $destpage=$params{destpage};
  55         delete $params{destpage};
  56         delete $params{preview};
  57
  58         eval q{use HTML::Entities};
  59         # Always decode, even if encoding later, since it might not be
  60         # fully encoded.
  61         $value=decode_entities($value);
  62
  63         if ($key eq 'title') {
  64                 $title{$page}=HTML::Entities::encode_numeric($value);
  65         }
  66         elsif ($key eq 'permalink') {
  67                 $permalink{$page}=$value;
  68                 push @{$meta{$page}}, scrub('<link rel="bookmark" href="'.encode_entities($value).'" />');
  69         }
  70         elsif ($key eq 'date') {
  71                 eval q{use Date::Parse};
  72                 if (! $@) {
  73                         my $time = str2time($value);
  74                         $IkiWiki::pagectime{$page}=$time if defined $time;
  75                 }
  76         }
  77         elsif ($key eq 'stylesheet') {
  78                 my $rel=exists $params{rel} ? $params{rel} : "alternate stylesheet";
  79                 my $title=exists $params{title} ? $params{title} : $value;
  80                 # adding .css to the value prevents using any old web
  81                 # editable page as a stylesheet
  82                 my $stylesheet=bestlink($page, $value.".css");
  83                 if (! length $stylesheet) {
  84                         return "[[meta ".gettext("stylesheet not found")."]]";
  85                 }
  86                 push @{$meta{$page}}, '<link href="'.urlto($stylesheet, $page).
  87                         '" rel="'.encode_entities($rel).
  88                         '" title="'.encode_entities($title).
  89                         "\" type=\"text/css\" />";
  90         }
  91         elsif ($key eq 'openid') {
  92                 if (exists $params{server}) {
  93                         push @{$meta{$page}}, '<link href="'.encode_entities($params{server}).
  94                                 '" rel="openid.server" />';
  95                 }
  96                 push @{$meta{$page}}, '<link href="'.encode_entities($value).
  97                         '" rel="openid.delegate" />';
  98         }
  99         elsif ($key eq 'license') {
 100                 push @{$meta{$page}}, '<link rel="license" href="#page_license" />';
 101                 $license{$page}=$value;
 102         }
 103         elsif ($key eq 'copyright') {
 104                 push @{$meta{$page}}, '<link rel="copyright" href="#page_copyright" />';
 105                 $copyright{$page}=$value;
 106         }
 107         elsif ($key eq 'redir') {
 108                 return "" if $page ne $destpage;
 109                 my $safe=0;
 110                 if ($value !~ /^\w+:\/\//) {
 111                         add_depends($page, $value);
 112                         my $link=bestlink($page, $value);
 113                         if (! length $link) {
 114                                 return "[[meta ".gettext("redir page not found")."]]";
 115                         }
 116
 117                         $value=urlto($link, $page);
 118                         $safe=1;
 119
 120                         # redir cycle detection
 121                         $pagestate{$page}{meta}{redir}=$link;
 122                         my $at=$page;
 123                         my %seen;
 124                         while (exists $pagestate{$at}{meta}{redir}) {
 125                                 if ($seen{$at}) {
 126                                         return "[[meta ".gettext("redir cycle is not allowed")."]]";
 127                                 }
 128                                 $seen{$at}=1;
 129                                 $at=$pagestate{$at}{meta}{redir};
 130                         }
 131                 }
 132                 else {
 133                         $value=encode_entities($value);
 134                 }
 135                 my $delay=int(exists $params{delay} ? $params{delay} : 0);
 136                 my $redir="<meta http-equiv=\"refresh\" content=\"$delay; URL=$value\">";
 137                 if (! $safe) {
 138                         $redir=scrub($redir);
 139                 }
 140                 push @{$meta{$page}}, $redir;
 141         }
 142         elsif ($key eq 'link') {
 143                 return "[[meta ".gettext("link is no longer supported")."]]";
 144         }
 145         else {
 146                 push @{$meta{$page}}, scrub('<meta name="'.encode_entities($key).
 147                         '" content="'.encode_entities($value).'" />');
 148                 if ($key eq 'author') {
 149                         $author{$page}=$value;
 150                 }
 151                 elsif ($key eq 'authorurl') {
 152                         $authorurl{$page}=$value;
 153                 }
 154         }
 155
 156         return "";
 157 } # }}}
 158
 159 sub pagetemplate (@) { #{{{
 160         my %params=@_;
 161         my $page=$params{page};
 162         my $destpage=$params{destpage};
 163         my $template=$params{template};
 164
 165         if (exists $meta{$page} && $template->query(name => "meta")) {
 166                 # avoid duplicate meta lines
 167                 my %seen;
 168                 $template->param(meta => join("\n", grep { (! $seen{$_}) && ($seen{$_}=1) } @{$meta{$page}}));
 169         }
 170         if (exists $title{$page} && $template->query(name => "title")) {
 171                 $template->param(title => $title{$page});
 172                 $template->param(title_overridden => 1);
 173         }
 174         $template->param(permalink => $permalink{$page})
 175                 if exists $permalink{$page} && $template->query(name => "permalink");
 176         $template->param(author => $author{$page})
 177                 if exists $author{$page} && $template->query(name => "author");
 178         $template->param(authorurl => $authorurl{$page})
 179                 if exists $authorurl{$page} && $template->query(name => "authorurl");
 180
 181         if ($page ne $destpage &&
 182             ((exists $license{$page}   && ! exists $license{$destpage}) ||
 183              (exists $copyright{$page} && ! exists $copyright{$destpage}))) {
 184                 # Force a scan of the destpage to get its copyright/license
 185                 # info. If the info is declared after an inline, it will
 186                 # otherwise not be available at this point.
 187                 IkiWiki::scan($pagesources{$destpage});
 188         }
 189
 190         if (exists $license{$page} && $template->query(name => "license") &&
 191             ($page eq $destpage || ! exists $license{$destpage} ||
 192              $license{$page} ne $license{$destpage})) {
 193                 $template->param(license => IkiWiki::linkify($page, $destpage, $license{$page}));
 194         }
 195         if (exists $copyright{$page} && $template->query(name => "copyright") &&
 196             ($page eq $destpage || ! exists $copyright{$destpage} ||
 197              $copyright{$page} ne $copyright{$destpage})) {
 198                 $template->param(copyright => IkiWiki::linkify($page, $destpage, $copyright{$page}));
 199         }
 200 } # }}}
 201
 202 1