From c886bea32084a920f3ba26b3f96327681f5db917 Mon Sep 17 00:00:00 2001
From: Simon McVittie <smcv@ http://smcv.pseudorandom.co.uk/>
Date: Sat, 31 Jan 2009 23:01:10 +0000
Subject: Split cgi_goto into a goto plugin

---
 IkiWiki/Plugin/goto.pm | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 IkiWiki/Plugin/goto.pm

(limited to 'IkiWiki/Plugin/goto.pm')

diff --git a/IkiWiki/Plugin/goto.pm b/IkiWiki/Plugin/goto.pm
new file mode 100644
index 000000000..9e7a2621f
--- /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;
-- 
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