Extension:Talkright

include_once("extensions/talkright.php");

$wgGroupPermissions['commentators']['edit'] = false;
$wgGroupPermissions['commentators']['talk'] = true;

<?php
/*
    Talkright MediaWiki Extension
    By Marc Noirot - marc dot noirot at gmail
 
    This extension makes the editing of talk pages a distinct action from
    the editing of articles, to create finer permissions by adding the 'talk' right.
*/
 
if (!defined('MEDIAWIKI')) die();
 
$wgExtensionCredits['other'][] = array(
    'name' => 'talkright',
    'description' => 'adds a talk permission independant from article edition',
    'url' => 'http://www.mediawiki.org/wiki/Extension:Talkright',
    'author' => 'Marc Noirot',
    'version' => '1.0.1'
);
 
/*
    global 'talk' right
*/
array_push($wgAvailableRights, 'talk');
 
/**
 * Can user edit the given page if it's a talk page ?
 * @param &$title the concerned page
 * @param &$wgUser the current mediawiki user
 * @param $action the action performed
 * @param &$result (out) true or false, or null if we don't care about the parameters
 */
function userCanTalk(&$title, &$wgUser, $action, &$result) {
    if ($action == 'edit' && $title->isTalkPage()) {
        if (!$wgUser->isAllowed('talk')) {
            $result = false;
            return false;
        }
    }
    return true;
}
 
/**
 * Bypass edit restriction when editing pages if user can talk and page is a comment.
 * @param $&editPage the page edition object
 * @return true to resume edition to normal operation
 */
function alternateEdit(&$editPage) {
    global $wgOut, $wgUser, $wgRequest, $wgTitle;
 
    if ($wgTitle->isTalkPage() && $wgUser->isAllowed('talk')) {
        array_push($wgUser->mRights, 'edit');
    }
    return true;
}
 
/*
    register global hooks
*/
$wgHooks['userCan'][] = 'userCanTalk';
$wgHooks['AlternateEdit'][] = 'alternateEdit';