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#!/usr/bin/perl
# Ikiwiki metadata plugin.
package IkiWiki::Plugin::meta;
use warnings;
use strict;
use IkiWiki 2.00;
my %meta;
my %title;
my %permalink;
my %author;
my %authorurl;
my %license;
my %copyright;
sub import { #{{{
hook(type => "needsbuild", id => "meta", call => \&needsbuild);
hook(type => "preprocess", id => "meta", call => \&preprocess, scan => 1);
hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
} # }}}
sub needsbuild (@) { #{{{
my $needsbuild=shift;
foreach my $page (keys %pagestate) {
if (exists $pagestate{$page}{meta}) {
if (grep { $_ eq $pagesources{$page} } @$needsbuild) {
# remove state, it will be re-added
# if the preprocessor directive is still
# there during the rebuild
delete $pagestate{$page}{meta};
}
}
}
}
sub scrub ($) { #{{{
if (IkiWiki::Plugin::htmlscrubber->can("sanitize")) {
return IkiWiki::Plugin::htmlscrubber::sanitize(content => shift);
}
else {
return shift;
}
} #}}}
sub htmlize ($$$) { #{{{
my $page = shift;
my $destpage = shift;
return IkiWiki::htmlize($page, pagetype($pagesources{$page}),
IkiWiki::linkify($page, $destpage,
IkiWiki::preprocess($page, $destpage, shift)));
}
sub preprocess (@) { #{{{
return "" unless @_;
my %params=@_;
my $key=shift;
my $value=$params{$key};
delete $params{$key};
my $page=$params{page};
delete $params{page};
my $destpage=$params{destpage};
delete $params{destpage};
delete $params{preview};
eval q{use HTML::Entities};
# Always decode, even if encoding later, since it might not be
# fully encoded.
$value=decode_entities($value);
# Metadata collection that needs to happen during the scan pass.
if ($key eq 'title') {
$title{$page}=HTML::Entities::encode_numeric($value);
}
elsif ($key eq 'license') {
push @{$meta{$page}}, '<link rel="license" href="#page_license" />';
$license{$page}=$value;
return "";
}
elsif ($key eq 'copyright') {
push @{$meta{$page}}, '<link rel="copyright" href="#page_copyright" />';
$copyright{$page}=$value;
return "";
}
elsif ($key eq 'link' && ! %params) {
# hidden WikiLink
push @{$links{$page}}, $value;
return "";
}
elsif ($key eq 'author') {
$author{$page}=$value;
# fallthorough
}
elsif ($key eq 'authorurl') {
$authorurl{$page}=$value;
# fallthrough
}
if (! defined wantarray) {
# avoid collecting duplicate data during scan pass
return;
}
# Metadata collection that happens only during preprocessing pass.
if ($key eq 'date') {
eval q{use Date::Parse};
if (! $@) {
my $time = str2time($value);
$IkiWiki::pagectime{$page}=$time if defined $time;
}
}
elsif ($key eq 'permalink') {
$permalink{$page}=$value;
push @{$meta{$page}}, scrub('<link rel="bookmark" href="'.encode_entities($value).'" />');
}
elsif ($key eq 'stylesheet') {
my $rel=exists $params{rel} ? $params{rel} : "alternate stylesheet";
my $title=exists $params{title} ? $params{title} : $value;
# adding .css to the value prevents using any old web
# editable page as a stylesheet
my $stylesheet=bestlink($page, $value.".css");
if (! length $stylesheet) {
return "[[meta ".gettext("stylesheet not found")."]]";
}
push @{$meta{$page}}, '<link href="'.urlto($stylesheet, $page).
'" rel="'.encode_entities($rel).
'" title="'.encode_entities($title).
"\" type=\"text/css\" />";
}
elsif ($key eq 'openid') {
if (exists $params{server}) {
push @{$meta{$page}}, '<link href="'.encode_entities($params{server}).
'" rel="openid.server" />';
}
push @{$meta{$page}}, '<link href="'.encode_entities($value).
'" rel="openid.delegate" />';
}
elsif ($key eq 'redir') {
return "" if $page ne $destpage;
my $safe=0;
if ($value !~ /^\w+:\/\//) {
my ($redir_page, $redir_anchor) = split /\#/, $value;
add_depends($page, $redir_page);
my $link=bestlink($page, $redir_page);
if (! length $link) {
return "[[meta ".gettext("redir page not found")."]]";
}
$value=urlto($link, $page);
$value.='#'.$redir_anchor if defined $redir_anchor;
$safe=1;
# redir cycle detection
$pagestate{$page}{meta}{redir}=$link;
my $at=$page;
my %seen;
while (exists $pagestate{$at}{meta}{redir}) {
if ($seen{$at}) {
return "[[meta ".gettext("redir cycle is not allowed")."]]";
}
$seen{$at}=1;
$at=$pagestate{$at}{meta}{redir};
}
}
else {
$value=encode_entities($value);
}
my $delay=int(exists $params{delay} ? $params{delay} : 0);
my $redir="<meta http-equiv=\"refresh\" content=\"$delay; URL=$value\">";
if (! $safe) {
$redir=scrub($redir);
}
push @{$meta{$page}}, $redir;
}
elsif ($key eq 'link') {
if (%params) {
push @{$meta{$page}}, scrub("<link href=\"".encode_entities($value)."\" ".
join(" ", map {
encode_entities($_)."=\"".encode_entities(decode_entities($params{$_}))."\""
} keys %params).
" />\n");
}
}
else {
push @{$meta{$page}}, scrub('<meta name="'.encode_entities($key).
'" content="'.encode_entities($value).'" />');
}
return "";
} # }}}
sub pagetemplate (@) { #{{{
my %params=@_;
my $page=$params{page};
my $destpage=$params{destpage};
my $template=$params{template};
if (exists $meta{$page} && $template->query(name => "meta")) {
# avoid duplicate meta lines
my %seen;
$template->param(meta => join("\n", grep { (! $seen{$_}) && ($seen{$_}=1) } @{$meta{$page}}));
}
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");
if (exists $license{$page} && $template->query(name => "license") &&
($page eq $destpage || ! exists $license{$destpage} ||
$license{$page} ne $license{$destpage})) {
$template->param(license => htmlize($page, $destpage, $license{$page}));
}
if (exists $copyright{$page} && $template->query(name => "copyright") &&
($page eq $destpage || ! exists $copyright{$destpage} ||
$copyright{$page} ne $copyright{$destpage})) {
$template->param(copyright => htmlize($page, $destpage, $copyright{$page}));
}
} # }}}
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