GoogleAnalyticsPlugin.inc.php

<?php
 
import('lib.pkp.classes.plugins.GenericPlugin');
 
class GoogleAnalyticsPlugin extends GenericPlugin {
   function register($category, $path, $mainContextId = null) {
      $success = parent::register($category, $path, $mainContextId);
      if (!Config::getVar('general', 'installed') || defined('RUNNING_UPGRADE')) return true;
      if ($success && $this->getEnabled($mainContextId)) {
         // Insert Google Analytics page tag to footer
         HookRegistry::register('TemplateManager::display', array($this, 'registerScript'));
      }
      return $success;
   }
 
   function getDisplayName() {
      return __('plugins.generic.googleAnalytics.displayName');
   }
 
   function getDescription() {
      return __('plugins.generic.googleAnalytics.description');
   }
 
   function getActions($request, $verb) {
      $router = $request->getRouter();
      import('lib.pkp.classes.linkAction.request.AjaxModal');
      return array_merge(
         $this->getEnabled()?array(
            new LinkAction(
               'settings',
               new AjaxModal(
                  $router->url($request, null, null, 'manage', null, array('verb' => 'settings', 'plugin' => $this->getName(), 'category' => 'generic')),
                  $this->getDisplayName()
               ),
               __('manager.plugins.settings'),
               null
            ),
         ):array(),
         parent::getActions($request, $verb)
      );
   }
 
   function manage($args, $request) {
      switch ($request->getUserVar('verb')) {
         case 'settings':
            $context = $request->getContext();
 
            AppLocale::requireComponents(LOCALE_COMPONENT_APP_COMMON,  LOCALE_COMPONENT_PKP_MANAGER);
            $templateMgr = TemplateManager::getManager($request);
            $templateMgr->registerPlugin('function', 'plugin_url', array($this, 'smartyPluginUrl'));
 
            $this->import('GoogleAnalyticsSettingsForm');
            $form = new GoogleAnalyticsSettingsForm($this, $context->getId());
 
            if ($request->getUserVar('save')) {
               $form->readInputData();
               if ($form->validate()) {
                  $form->execute();
                  return new JSONMessage(true);
               }
            } else {
               $form->initData();
            }
            return new JSONMessage(true, $form->fetch($request));
      }
      return parent::manage($args, $request);
   }
 
   function registerScript($hookName, $params) {
      $request = Application::get()->getRequest();
      $context = $request->getContext();
      if (!$context) return false;
      $router = $request->getRouter();
      if (!is_a($router, 'PKPPageRouter')) return false;
 
      $googleAnalyticsSiteId = $this->getSetting($context->getId(), 'googleAnalyticsSiteId');
      if (empty($googleAnalyticsSiteId)) return false;
 
      $googleAnalyticsCode = "
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
 
ga('create', '$googleAnalyticsSiteId', 'auto');
ga('send', 'pageview');
";
 
      $templateMgr = TemplateManager::getManager($request);
      $templateMgr->addJavaScript(
         'googleanalytics',
         $googleAnalyticsCode,
         array(
            'priority' => STYLE_SEQUENCE_LAST,
            'inline'   => true,
         )
      );
 
      return false;
   }
}