Extension:PublicCat.php

Legacy: This article describes a concept that has been superseded in the course of ongoing development on the Organic Design wiki. Please do not develop this any further or base work on this concept, now this page is for historic record only.

<?php
# - Licenced under LGPL (http://www.gnu.org/copyleft/lesser.html)
# - Author: [http://www.organicdesign.co.nz/aran Aran Dunkley]

if (!defined('MEDIAWIKI')) die('Not an entry point.');

define('PUBLICCAT_VERSION','1.0.7, 2008-10-28');

# Name of category in which to place articles to make them viewable from the public site
if (!isset($wgPublicCat)) $wgPublicCat = 'Public';

# Pattern to match with domain to determine if client accessing private wiki or public website
if (!isset($wgPublicCatPrivatePattern)) $wgPublicCatPrivatePattern = '/^wiki\\./';

$wgExtensionCredits['other'][] = array(
	'name'        => 'PublicCat',
	'author'      => '[http://www.organicdesign.co.nz/nad User:Nad]',
	'description' => 'Divides wiki into private and public by domain name, but allows unrestricted access to articles in a public category.',
	'url'         => 'http://www.mediawiki.org/wiki/Extension:PublicCat',
	'version'     => PUBLICCAT_VERSION
);

# Hook in after article and title prepared
# - should be able to hook in earlier than this,
# - but note that it must be a hook that always executes, even for specialpages
$wgHooks['OutputPageBeforeHTML'][] = 'wfPublicCatValidate';

# Determine if the request is private or public from the domain and pattern
$wgPublicCatRequestIsPrivate = preg_match($wgPublicCatPrivatePattern,$_SERVER['HTTP_HOST']);
$wgPublicCatRequestIsPublic  = !$wgPublicCatRequestIsPrivate;

# Disable all actions except view for anonymous users
$wgGroupPermissions['*']['createaccount'] = false;
$wgGroupPermissions['*']['read']          = $wgPublicCatRequestIsPublic;
$wgGroupPermissions['*']['edit']          = false;
$wgGroupPermissions['*']['createpage']    = false;
$wgGroupPermissions['*']['createtalk']    = false;

# Allow unrestricted access to login and css's
$wgWhitelistRead = array('Special:Userlogin','-');
if (eregi('\\.css$',$_REQUEST['title'])) $wgWhitelistRead[] = $_REQUEST['title'];

# If request is public, restrict action to view, raw or render
if ($wgPublicCatRequestIsPublic) {
	if ($_REQUEST['action'] != 'view' && $_REQUEST['action'] != 'raw' && $_REQUEST['action'] != 'render')
		$_REQUEST['action'] = 'view';
}

# Function to check if passed a title is in a category
function inCat($title, $cat) {
	if (!is_object($title)) $title = Title::newFromText($title);
	$id   = $title->getArticleID();
	$dbr  = &wfGetDB(DB_SLAVE);
	$cat  = $dbr->addQuotes($cat);
	$cl   = $dbr->tableName('categorylinks');
	return $dbr->selectRow($cl, '0', "cl_from = $id AND cl_to = $cat", __METHOD__);
}

# Return a 404 not found error if request is public but requested title is not in the public cat
function wfPublicCatValidate() {
	global $wgPublicCat,$wgPublicCatRequestIsPublic,$wgTitle;
	if ($wgPublicCatRequestIsPublic && !wfPublicCatInCat($wgTitle,$wgPublicCat))
		wfHttpError(404,"404 Not Found","The requested URL was not found on this server!");
	return true;
}