Added configurable Google Analytics support.

Resolves VUFIND-744; thanks to Tom Misilo.

config/vufind/config.ini

@@ -869,4 +869,8 @@ treeSearchLimit = 100
 [Social]
 ; This controls the maximum length of a single tag; it should correspond with the
 ; field size in the tags database table.
-max_tag_length = 64
+max_tag_length = 64
\ No newline at end of file
+
+; Uncomment this section and provide your API key to enable Google Analytics
+;[GoogleAnalytics]
+;apiKey = "mykey"
\ No newline at end of file

module/VuFind/src/VuFind/View/Helper/Root/GoogleAnalytics.php

+<?php
+/**
+ * GoogleAnalytics view helper
+ *
+ * PHP version 5
+ *
+ * Copyright (C) Villanova University 2010.
+ *
+ * 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  View_Helpers
+ * @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\View\Helper\Root;
+
+/**
+ * GoogleAnalytics view helper
+ *
+ * @category VuFind2
+ * @package  View_Helpers
+ * @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 GoogleAnalytics extends \Zend\View\Helper\AbstractHelper
+{
+    /**
+     * API key (false if disabled)
+     *
+     * @var string|bool
+     */
+    protected $key;
+
+    /**
+     * Constructor
+     *
+     * @param string|bool $key API key (false if disabled)
+     */
+    public function __construct($key)
+    {
+        $this->key = $key;
+    }
+
+    /**
+     * Returns GA code (if active) or empty string if not.
+     *
+     * @return string
+     */
+    public function __invoke()
+    {
+        if (!$this->key) {
+            return '';
+        }
+        $code = 'var key = "' . $this->key . '";' . "\n"
+            . "var _gaq = _gaq || [];\n"
+            . "_gaq.push(['_setAccount', key]);\n"
+            . "_gaq.push(['_trackPageview']);\n"
+            . "(function() {\n"
+            . "var ga = document.createElement('script'); "
+            . "ga.type = 'text/javascript'; ga.async = true;\n"
+            . "ga.src = ('https:' == document.location.protocol ? "
+            . "'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';\n"
+            . "var s = document.getElementsByTagName('script')[0]; "
+            . "s.parentNode.insertBefore(ga, s);\n"
+            . "})();";
+        $inlineScript = $this->getView()->plugin('inlinescript');
+        return $inlineScript(\Zend\View\Helper\HeadScript::SCRIPT, $code);
+    }
+}
\ No newline at end of file

themes/blueprint/templates/layout/layout.phtml

@@ -103,5 +103,6 @@
         <?=$this->layout()->poweredBy?>
       </div>
     </div>
+    <?=$this->googleanalytics()?>
   </body>
 </html>
\ No newline at end of file

themes/jquerymobile/templates/layout/layout.phtml

@@ -38,5 +38,6 @@
         <? endif; ?>
       </div>
     </div>
+    <?=$this->googleanalytics()?>
   </body>
 </html>

themes/root/theme.config.php

@@ -60,6 +60,12 @@ return array(
                     ->get('FlashMessenger');
                 return new \VuFind\View\Helper\Root\Flashmessages($messenger);
             },
+            'googleanalytics' => function ($sm) {
+                $config = $sm->getServiceLocator()->get('VuFind\Config')->get('config');
+                $key = isset($config->GoogleAnalytics->apiKey)
+                    ? $config->GoogleAnalytics->apiKey : false;
+                return new \VuFind\View\Helper\Root\GoogleAnalytics($key);
+            },
             'ils' => function ($sm) {
                 return new \VuFind\View\Helper\Root\Ils(
                     $sm->getServiceLocator()->get('VuFind\ILSConnection')