Split cgi_goto into a goto plugin

[ikiwiki.git] / IkiWiki / Plugin / goto.pm

diff --git a/IkiWiki/Plugin/goto.pm b/IkiWiki/Plugin/goto.pm
new file mode 100644 (file)
index 0000000..9e7a262
--- /dev/null
+++ b/IkiWiki/Plugin/goto.pm
@@ -0,0 +1,76 @@
+#!/usr/bin/perl
+package IkiWiki::Plugin::goto;
+
+use warnings;
+use strict;
+use IkiWiki 3.00;
+
+sub import {
+       hook(type => "cgi", id => 'goto',  call => \&cgi);
+}
+
+sub getsetup () {
+       return
+               plugin => {
+                       safe => 1,
+                       rebuild => 0,
+               }
+}
+
+# cgi_goto(CGI, [page])
+# Redirect to a specified page, or display "not found". If not specified,
+# the page param from the CGI object is used.
+sub cgi_goto ($;$) {
+       my $q = shift;
+       my $page = shift;
+
+       if (!defined $page) {
+               $page = IkiWiki::decode_utf8($q->param("page"));
+
+               if (!defined $page) {
+                       error("missing page parameter");
+               }
+       }
+
+       IkiWiki::loadindex();
+
+       # If the page is internal (like a comment), see if it has a
+       # permalink. Comments do.
+       if (IkiWiki::isinternal($page) &&
+           defined $pagestate{$page}{meta}{permalink}) {
+               redirect($q, $pagestate{$page}{meta}{permalink});
+       }
+
+       my $link = bestlink("", $page);
+
+       if (! length $link) {
+               print $q->header(-status => "404 Not Found");
+               print IkiWiki::misctemplate(gettext("missing page"),
+                       "<p>".
+                       sprintf(gettext("The page %s does not exist."),
+                               htmllink("", "", $page)).
+                       "</p>".
+                       # Internet Explorer won't show custom 404 responses
+                       # unless they're >= 512 bytes
+                       (" " x 512));
+       }
+       else {
+               IkiWiki::redirect($q, urlto($link, undef, 1));
+       }
+
+       exit;
+}
+
+sub cgi ($) {
+       my $cgi=shift;
+       my $do = $cgi->param('do');
+
+       if (defined $do && ($do eq 'goto' || $do eq 'commenter' ||
+                              $do eq 'recentchanged_link')) {
+               # goto is the preferred name for this; recentchanges_link and
+               # commenter are for compatibility with any saved URLs
+               cgi_goto($cgi);
+       }
+}
+
+1;