action.php

<?php
/**
 * Plugin Goole+1
 *
 * @author Enrico Croce & Simona Burzio (staff@eiroca.net)
 * @copyright Copyright (C) 2013-2019 eIrOcA - Enrico Croce & Simona Burzio
 * @license GPL >=3 (http://www.gnu.org/licenses/)
 * @version 19.02
 * @link http://www.eiroca.net/doku_gplusone
 */
if (!defined('DOKU_INC')) die();
if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN', DOKU_INC . 'lib/plugins/');
if (!defined('DOKU_PLUGIN_GPLUSONE')) define('DOKU_PLUGIN_GPLUSONE', DOKU_PLUGIN . 'gplusone/');
require_once (DOKU_PLUGIN . 'action.php');

class action_plugin_gplusone extends DokuWiki_Action_Plugin {

  function register(Doku_Event_Handler $controller) {
    $controller->register_hook('TOOLBAR_DEFINE', 'AFTER', $this, 'toolbar_add_button_gplusone', array ());
    $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'gplus_script');
  }

  function toolbar_add_button_gplusone(&$event, $param) {
    $event->data[] = array (
        'type' => 'format', 'title' => $this->getLang('gplusone_editor'), 'icon' => '../../plugins/gplusone/editor/gplusone.png', 'open' => '~~GPLUSONE', 'sample' => @file_get_contents(DOKU_PLUGIN_GPLUSONE . 'editor/sample.txt'), 'close' => '~~'
    );
  }

  function gplus_script(&$event, $param) {
    global $ID;
    global $conf;
    $end_date = mktime(0, 0, 0, 3, 1, 2019);
    if (($end_date - time()) > 0) {
      if (plugin_isdisabled('translation') || (!$translation = plugin_load('helper', 'translation'))) {
        $lang = $conf['lang'];
      }
      else {
        $lang = $translation->getLangPart($ID);
      }
      $event->data['script'][] = array (
          'type' => 'text/javascript', '_data' => "window.___gcfg = {lang: '$lang'};(function() {var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;po.src = 'https://apis.google.com/js/plusone.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);})();"
      );
    }
  }

}
?>