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#!/usr/bin/perl
# Ikiwiki metadata plugin.
package IkiWiki::Plugin::meta;
use warnings;
use strict;
use IkiWiki;
my %meta;
my %title;
my %permalink;
my %author;
my %authorurl;
sub import { #{{{
hook(type => "preprocess", id => "meta", call => \&preprocess, scan => 1);
hook(type => "filter", id => "meta", call => \&filter);
hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
} # }}}
sub filter (@) { #{{{
my %params=@_;
$meta{$params{page}}='';
return $params{content};
} # }}}
sub preprocess (@) { #{{{
if (! @_) {
return "";
}
my %params=@_;
my $key=shift;
my $value=$params{$key};
delete $params{$key};
my $page=$params{page};
delete $params{page};
delete $params{destpage};
eval q{use HTML::Entities};
# Always dencode, even if encoding later, since it might not be
# fully encoded.
$value=decode_entities($value);
if ($key eq 'link') {
if (%params) {
$meta{$page}.="<link href=\"".encode_entities($value)."\" ".
join(" ", map { encode_entities($_)."=\"".encode_entities(decode_entities($params{$_}))."\"" } keys %params).
" />\n";
}
else {
# hidden WikiLink
push @{$links{$page}}, $value;
}
}
elsif ($key eq 'title') {
$title{$page}=$value;
}
elsif ($key eq 'permalink') {
$permalink{$page}=$value;
$meta{$page}.="<link rel=\"bookmark\" href=\"".encode_entities($value)."\" />\n";
}
else {
$meta{$page}.="<meta name=\"".encode_entities($key).
"\" content=\"".encode_entities($value)."\" />\n";
if ($key eq 'author') {
$author{$page}=$value;
}
elsif ($key eq 'authorurl') {
$authorurl{$page}=$value;
}
}
return "";
} # }}}
sub pagetemplate (@) { #{{{
my %params=@_;
my $page=$params{page};
my $template=$params{template};
$template->param(meta => $meta{$page})
if exists $meta{$page} && $template->query(name => "meta");
if (exists $title{$page} && $template->query(name => "title")) {
$template->param(title => $title{$page});
$template->param(title_overridden => 1);
}
$template->param(permalink => $permalink{$page})
if exists $permalink{$page} && $template->query(name => "permalink");
$template->param(author => $author{$page})
if exists $author{$page} && $template->query(name => "author");
$template->param(authorurl => $authorurl{$page})
if exists $authorurl{$page} && $template->query(name => "authorurl");
} # }}}
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