Implemented help controller.

module/VuFind/config/module.config.php

@@ -71,6 +71,7 @@ $config = array(
             'cart' => 'VuFind\Controller\CartController',
             'cover' => 'VuFind\Controller\CoverController',
             'error' => 'VuFind\Controller\ErrorController',
+            'help' => 'VuFind\Controller\HelpController',
             'index' => 'VuFind\Controller\IndexController',
             'my-research' => 'VuFind\Controller\MyResearchController',
             'record' => 'VuFind\Controller\RecordController',

module/VuFind/src/VuFind/Controller/HelpController.php

+<?php
+/**
+ * Home action for Help module
+ *
+ * PHP version 5
+ *
+ * Copyright (C) Villanova University 2007.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * @category VuFind2
+ * @package  Controller
+ * @author   Chris Hallberg <challber@villanova.edu>
+ * @author   Andrew S. Nagy <vufind-tech@lists.sourceforge.net>
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org   Main Site
+ */
+namespace VuFind\Controller;
+use VuFind\Config\Reader as ConfigReader, VuFind\Translator\Translator;
+
+/**
+ * Home action for Help module
+ *
+ * @category VuFind2
+ * @package  Controller
+ * @author   Chris Hallberg <challber@villanova.edu>
+ * @author   Andrew S. Nagy <vufind-tech@lists.sourceforge.net>
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org   Main Site
+ */
+class HelpController extends AbstractBase
+{
+    /**
+     * Uses the user language to determine which Help template to use
+     * Uses the English template as a back-up
+     *
+     * @return void  Sends data to the view (tpl_lang, tpl_en)
+     */
+    public function homeAction()
+    {
+        $config = ConfigReader::getConfig();
+        $this->layout()->setTemplate('layout/help');
+
+        // Sanitize the topic name to include only alphanumeric characters
+        // or underscores.
+        $safe_topic
+            = preg_replace('/[^\w]/', '', $this->params()->fromQuery('topic'));
+
+        // Construct two possible template names -- the help screen in the
+        // current selected language and help in English (most likely to exist).
+        // The code will attempt to display the most appropriate existing help screen
+        $translator = Translator::getTranslator();
+        $language = is_object($translator) ? $translator->getLocale() : 'en';
+
+        $tpl_lang = 'HelpTranslations/' . $language
+            . '/' . $safe_topic . '.phtml';
+        $tpl_en = 'HelpTranslations/en/' . $safe_topic . '.phtml';
+       
+        // Best case -- help is available in the user's chosen language
+        return $this->createViewModel(
+            array('tpl_lang' => $tpl_lang, 'tpl_en' => $tpl_en)
+        );
+    }
+}
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