git: change calling convention of safe_git to have named arguments

[git.ikiwiki.info.git] / IkiWiki / Plugin / meta.pm

diff --git a/IkiWiki/Plugin/meta.pm b/IkiWiki/Plugin/meta.pm
index 15a8bad845f08e389bbc656ff518947ff175c6b9..421f1dc86a83d33ac823f9989ad9e42c6dea12c9 100644 (file)
--- a/IkiWiki/Plugin/meta.pm
+++ b/IkiWiki/Plugin/meta.pm
@@ -4,64 +4,450 @@ package IkiWiki::Plugin::meta;
 
 use warnings;
 use strict;
 
 use warnings;
 use strict;

-use IkiWiki;
+use IkiWiki 3.00;

 
 

-my %meta;
-my %title;
+my %metaheaders;

 
 

-sub import { #{{{
-       IkiWiki::hook(type => "preprocess", id => "meta", 
-               call => \&preprocess);
-       IkiWiki::hook(type => "pagetemplate", id => "meta", 
-               call => \&pagetemplate);
-} # }}}
+sub import {
+       hook(type => "getsetup", id => "meta", call => \&getsetup);
+       hook(type => "needsbuild", id => "meta", call => \&needsbuild);
+       hook(type => "preprocess", id => "meta", call => \&preprocess, scan => 1);
+       hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
+}

 
 

-sub preprocess (@) { #{{{
-       if (! @_) {
-               return "";
+sub getsetup () {
+       return
+               plugin => {
+                       safe => 1,
+                       rebuild => undef,
+                       section => "core",
+               },
+}
+
+sub needsbuild (@) {
+       my $needsbuild=shift;
+       foreach my $page (keys %pagestate) {
+               if (exists $pagestate{$page}{meta}) {
+                       if (exists $pagesources{$page} &&
+                           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};
+                       }
+               }
+       }
+       return $needsbuild;
+}
+
+sub scrub ($$$) {
+       if (IkiWiki::Plugin::htmlscrubber->can("sanitize")) {
+               return IkiWiki::Plugin::htmlscrubber::sanitize(
+                       content => shift, page => shift, destpage => shift);
+       }
+       else {
+               return shift;

        }
        }

+}
+
+sub safeurl ($) {
+       my $url=shift;
+       if (exists $IkiWiki::Plugin::htmlscrubber::{safe_url_regexp} &&
+           defined $IkiWiki::Plugin::htmlscrubber::safe_url_regexp) {
+               return $url=~/$IkiWiki::Plugin::htmlscrubber::safe_url_regexp/;
+       }
+       else {
+               return 1;
+       }
+}
+
+sub htmlize ($$$) {
+       my $page = shift;
+       my $destpage = shift;
+
+       return IkiWiki::htmlize($page, $destpage, pagetype($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 %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{destpage};

+       delete $params{preview};

 
 

-       eval q{use CGI 'escapeHTML'};
+       eval q{use HTML::Entities};
+       # Always decode, even if encoding later, since it might not be
+       # fully encoded.
+       $value=decode_entities($value);

 
 

-       if ($key eq 'link') {
-               if (%params) {
-                       $meta{$page}='' unless exists $meta{$page};
-                       $meta{$page}.="<link href=\"".escapeHTML($value)."\" ".
-                               join(" ", map { escapeHTML("$_=\"$params{$_}\"") } keys %params).
-                               " />\n";
+       # Metadata collection that needs to happen during the scan pass.
+       if ($key eq 'title') {
+               $pagestate{$page}{meta}{title}=$value;
+               if (exists $params{sortas}) {
+                       $pagestate{$page}{meta}{titlesort}=$params{sortas};
+               }
+               else {
+                       delete $pagestate{$page}{meta}{titlesort};
+               }
+               return "";
+       }
+       elsif ($key eq 'description') {
+               $pagestate{$page}{meta}{description}=$value;
+               # fallthrough
+       }
+       elsif ($key eq 'guid') {
+               $pagestate{$page}{meta}{guid}=$value;
+               # fallthrough
+       }
+       elsif ($key eq 'license') {
+               push @{$metaheaders{$page}}, '<link rel="license" href="#page_license" />';
+               $pagestate{$page}{meta}{license}=$value;
+               return "";
+       }
+       elsif ($key eq 'copyright') {
+               push @{$metaheaders{$page}}, '<link rel="copyright" href="#page_copyright" />';
+               $pagestate{$page}{meta}{copyright}=$value;
+               return "";
+       }
+       elsif ($key eq 'link' && ! %params) {
+               # hidden WikiLink
+               add_link($page, $value);
+               return "";
+       }
+       elsif ($key eq 'author') {
+               $pagestate{$page}{meta}{author}=$value;
+               if (exists $params{sortas}) {
+                       $pagestate{$page}{meta}{authorsort}=$params{sortas};

                }
                else {
                }
                else {

-                       # hidden WikiLink
-                       push @{$IkiWiki::links{$page}}, $value;
+                       delete $pagestate{$page}{meta}{authorsort};

                }
                }

+               # fallthorough

        }
        }

-       elsif ($key eq 'title') {
-               $title{$page}=escapeHTML($value);
+       elsif ($key eq 'authorurl') {
+               $pagestate{$page}{meta}{authorurl}=$value if safeurl($value);
+               # fallthrough
+       }
+       elsif ($key eq 'permalink') {
+               $pagestate{$page}{meta}{permalink}=$value if safeurl($value);
+               # fallthrough
+       }
+       elsif ($key eq 'date') {
+               eval q{use Date::Parse};
+               if (! $@) {
+                       my $time = str2time($value);
+                       $IkiWiki::pagectime{$page}=$time if defined $time;
+               }
+       }
+       elsif ($key eq 'updated') {
+               eval q{use Date::Parse};
+               if (! $@) {
+                       my $time = str2time($value);
+                       $pagestate{$page}{meta}{updated}=$time if defined $time;
+               }
+       }
+
+       if (! defined wantarray) {
+               # avoid collecting duplicate data during scan pass
+               return;
+       }
+
+       # Metadata handling that happens only during preprocessing pass.
+       if ($key eq 'permalink') {
+               if (safeurl($value)) {
+                       push @{$metaheaders{$page}}, scrub('<link rel="bookmark" href="'.encode_entities($value).'" />', $page, $destpage);
+               }
+       }
+       elsif ($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 $stylesheet) {
+                       error gettext("stylesheet not found")
+               }
+               push @{$metaheaders{$page}}, scrub('<link href="'.urlto($stylesheet, $page).
+                       '" rel="'.encode_entities($rel).
+                       '" title="'.encode_entities($title).
+                       "\" type=\"text/css\" />", $page, $destpage);
+       }
+       elsif ($key eq 'script') {
+               my $defer=exists $params{defer} ? ' defer="defer"' : '';
+               my $async=exists $params{async} ? ' async="async"' : '';
+               my $js=bestlink($page, $value.".js");
+               if (! length $js) {
+                       error gettext("script not found");
+               }
+               push @{$metaheaders{$page}}, scrub('<script src="'.urlto($js, $page).
+                       '"' . $defer . $async . ' type="text/javascript"></script>',
+                       $page, $destpage);
+       }
+       elsif ($key eq 'openid') {
+               my $delegate=0; # both by default
+               if (exists $params{delegate}) {
+                       $delegate = 1 if lc $params{delegate} eq 'openid';
+                       $delegate = 2 if lc $params{delegate} eq 'openid2';
+               }
+               if (exists $params{server} && safeurl($params{server})) {
+                       push @{$metaheaders{$page}}, '<link href="'.encode_entities($params{server}).
+                               '" rel="openid.server" />' if $delegate ne 2;
+                       push @{$metaheaders{$page}}, '<link href="'.encode_entities($params{server}).
+                               '" rel="openid2.provider" />' if $delegate ne 1;
+               }
+               if (safeurl($value)) {
+                       push @{$metaheaders{$page}}, '<link href="'.encode_entities($value).
+                               '" rel="openid.delegate" />' if $delegate ne 2;
+                       push @{$metaheaders{$page}}, '<link href="'.encode_entities($value).
+                               '" rel="openid2.local_id" />' if $delegate ne 1;
+               }
+               if (exists $params{"xrds-location"} && safeurl($params{"xrds-location"})) {
+                       # force url absolute
+                       eval q{use URI};
+                       error($@) if $@;
+                       my $url=URI->new_abs($params{"xrds-location"}, $config{url});
+                       push @{$metaheaders{$page}}, '<meta http-equiv="X-XRDS-Location" '.
+                               'content="'.encode_entities($url).'" />';
+               }
+       }
+       elsif ($key eq 'foaf') {
+               if (safeurl($value)) {
+                       push @{$metaheaders{$page}}, '<link rel="meta" '.
+                               'type="application/rdf+xml" title="FOAF" '.
+                               'href="'.encode_entities($value).'" />';
+               }
+       }
+       elsif ($key eq 'redir') {
+               return "" if $page ne $destpage;
+               my $safe=0;
+               if ($value !~ /^\w+:\/\//) {
+                       my ($redir_page, $redir_anchor) = split /\#/, $value;
+
+                       my $link=bestlink($page, $redir_page);
+                       if (! length $link) {
+                               error gettext("redir page not found")
+                       }
+                       add_depends($page, $link, deptype("presence"));
+
+                       $value=urlto($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}) {
+                                       error 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, $page, $destpage);
+               }
+               push @{$metaheaders{$page}}, $redir;
+       }
+       elsif ($key eq 'link') {
+               if (%params) {
+                       push @{$metaheaders{$page}}, scrub("<link href=\"".encode_entities($value)."\" ".
+                               join(" ", map {
+                                       encode_entities($_)."=\"".encode_entities(decode_entities($params{$_}))."\""
+                               } keys %params).
+                               " />\n", $page, $destpage);
+               }
+       }
+       elsif ($key eq 'robots') {
+               push @{$metaheaders{$page}}, '<meta name="robots"'.
+                       ' content="'.encode_entities($value).'" />';
+       }
+       elsif ($key eq 'description' || $key eq 'author') {
+               push @{$metaheaders{$page}}, '<meta name="'.$key.
+                       '" content="'.encode_entities($value).'" />';
+       }
+       elsif ($key eq 'name') {
+               push @{$metaheaders{$page}}, scrub('<meta name="'.
+                       encode_entities($value).
+                       join(' ', map { "$_=\"$params{$_}\"" } keys %params).
+                       ' />', $page, $destpage);
+       }
+       elsif ($key eq 'keywords') {
+               # Make sure the keyword string is safe: only allow alphanumeric
+               # characters, space and comma and strip the rest.
+               $value =~ s/[^[:alnum:], ]+//g;
+               push @{$metaheaders{$page}}, '<meta name="keywords"'.
+                       ' content="'.encode_entities($value).'" />';

        }
        else {
        }
        else {

-               $meta{$page}='' unless exists $meta{$page};
-               $meta{$page}.="<meta name=\"".escapeHTML($key)."\" content=\"".escapeHTML($value)."\" />\n";
+               push @{$metaheaders{$page}}, scrub('<meta name="'.
+                       encode_entities($key).'" content="'.
+                       encode_entities($value).'" />', $page, $destpage);

        }
 
        return "";
        }
 
        return "";

-} # }}}
+}

 
 

-sub pagetemplate (@) { #{{{
+sub pagetemplate (@) {

        my %params=@_;
         my $page=$params{page};
        my %params=@_;
         my $page=$params{page};

+        my $destpage=$params{destpage};

         my $template=$params{template};
 
         my $template=$params{template};
 

-       $template->param(meta => $meta{$page})
-               if exists $meta{$page} && $template->query(name => "meta");
-       $template->param(title => $title{$page})
-               if exists $title{$page} && $template->query(name => "title");
-} # }}}
+       if (exists $metaheaders{$page} && $template->query(name => "meta")) {
+               # avoid duplicate meta lines
+               my %seen;
+               $template->param(meta => join("\n", grep { (! $seen{$_}) && ($seen{$_}=1) } @{$metaheaders{$page}}));
+       }
+       if (exists $pagestate{$page}{meta}{title} && $template->query(name => "title")) {
+               eval q{use HTML::Entities};
+               $template->param(title => HTML::Entities::encode_numeric($pagestate{$page}{meta}{title}));
+               $template->param(title_overridden => 1);
+       }
+
+       foreach my $field (qw{authorurl}) {
+               eval q{use HTML::Entities};
+               $template->param($field => HTML::Entities::encode_entities($pagestate{$page}{meta}{$field}))
+                       if exists $pagestate{$page}{meta}{$field} && $template->query(name => $field);
+       }
+
+       foreach my $field (qw{permalink}) {
+               if (exists $pagestate{$page}{meta}{$field} && $template->query(name => $field)) {
+                       eval q{use HTML::Entities};
+                       $template->param($field => HTML::Entities::encode_entities(IkiWiki::urlabs($pagestate{$page}{meta}{$field}, $config{url})));
+               }
+       }
+
+       foreach my $field (qw{description author}) {
+               eval q{use HTML::Entities};
+               $template->param($field => HTML::Entities::encode_numeric($pagestate{$page}{meta}{$field}))
+                       if exists $pagestate{$page}{meta}{$field} && $template->query(name => $field);
+       }
+
+       foreach my $field (qw{license copyright}) {
+               if (exists $pagestate{$page}{meta}{$field} && $template->query(name => $field) &&
+                   ($page eq $destpage || ! exists $pagestate{$destpage}{meta}{$field} ||
+                    $pagestate{$page}{meta}{$field} ne $pagestate{$destpage}{meta}{$field})) {
+                       $template->param($field => htmlize($page, $destpage, $pagestate{$page}{meta}{$field}));
+               }
+       }
+}
+
+sub get_sort_key {
+       my $page = shift;
+       my $meta = shift;
+
+       # e.g. titlesort (also makes sense for author)
+       my $key = $pagestate{$page}{meta}{$meta . "sort"};
+       return $key if defined $key;
+
+       # e.g. title
+       $key = $pagestate{$page}{meta}{$meta};
+       return $key if defined $key;
+
+       # fall back to closer-to-core things
+       if ($meta eq 'title') {
+               return pagetitle(IkiWiki::basename($page));
+       }
+       elsif ($meta eq 'date') {
+               return $IkiWiki::pagectime{$page};
+       }
+       elsif ($meta eq 'updated') {
+               return $IkiWiki::pagemtime{$page};
+       }
+       else {
+               return '';
+       }
+}
+
+sub match {
+       my $field=shift;
+       my $page=shift;
+       
+       # turn glob into a safe regexp
+       my $re=IkiWiki::glob2re(shift);
+
+       my $val;
+       if (exists $pagestate{$page}{meta}{$field}) {
+               $val=$pagestate{$page}{meta}{$field};
+       }
+       elsif ($field eq 'title') {
+               $val = pagetitle($page);
+       }
+
+       if (defined $val) {
+               if ($val=~$re) {
+                       return IkiWiki::SuccessReason->new("$re matches $field of $page", $page => $IkiWiki::DEPEND_CONTENT, "" => 1);
+               }
+               else {
+                       return IkiWiki::FailReason->new("$re does not match $field of $page", $page => $IkiWiki::DEPEND_CONTENT, "" => 1);
+               }
+       }
+       else {
+               return IkiWiki::FailReason->new("$page does not have a $field", $page => $IkiWiki::DEPEND_CONTENT);
+       }
+}
+
+package IkiWiki::PageSpec;
+
+sub match_title ($$;@) {
+       IkiWiki::Plugin::meta::match("title", @_);
+}
+
+sub match_author ($$;@) {
+       IkiWiki::Plugin::meta::match("author", @_);
+}
+
+sub match_authorurl ($$;@) {
+       IkiWiki::Plugin::meta::match("authorurl", @_);
+}
+
+sub match_license ($$;@) {
+       IkiWiki::Plugin::meta::match("license", @_);
+}
+
+sub match_copyright ($$;@) {
+       IkiWiki::Plugin::meta::match("copyright", @_);
+}
+
+sub match_guid ($$;@) {
+       IkiWiki::Plugin::meta::match("guid", @_);
+}
+
+package IkiWiki::SortSpec;
+
+sub cmp_meta {
+       my $meta = shift;
+       error(gettext("sort=meta requires a parameter")) unless defined $meta;
+
+       if ($meta eq 'updated' || $meta eq 'date') {
+               return IkiWiki::Plugin::meta::get_sort_key($a, $meta)
+                       <=>
+                       IkiWiki::Plugin::meta::get_sort_key($b, $meta);
+       }
+
+       return IkiWiki::Plugin::meta::get_sort_key($a, $meta)
+               cmp
+               IkiWiki::Plugin::meta::get_sort_key($b, $meta);
+}
+
+# A prototype of how sort=title could behave in 4.0 or something
+sub cmp_meta_title {
+       $_[0] = 'title';
+       return cmp_meta(@_);
+}

 
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