Inserire social-sharing GitHub in un blocco sotto al contenuto

<?php
function currentnode_nid(){
    if (arg(0)=='node' && is_numeric(arg(1)))
        return arg(1);
    else
        return 0;
}
/* node_load return object
*
stdClass Object
(
    [vid] => 1
    [uid] => 1
    [title] => Career Tip 1
    [log] =>
    [status] => 1
    [comment] => 2
    [promote] => 1
    [sticky] => 0
    [nid] => 1
    [type] => career_tips
    [language] => und
    [created] => 1377871907
    [changed] => 1377871907
    [tnid] => 0
    [translate] => 0
    [revision_timestamp] => 1377871907
    [revision_uid] => 1
    [body] => Array
*
*/
function currentnode(){
    return node_load(currentnode_nid());
}
/**
 * Implements hook_block_view().
 *
 * Displays the most recent 10 blog titles.
 */
function MYMODULE_block_view($delta = '') {
  global $user;
    $curnode = currentnode();
    $node_url = drupal_get_path_alias('node/'.$curnode->nid);
    $title = $node->title;
    $node_shared = '<p>
<button class="btn btn-google" onclick="location.href=\'<a href="https://plus.google.com/share?url=" rel="nofollow">https://plus.google.com/share?url=</a>$node_url\';">Google+</button> <button class="btn btn-tweet" onclick="location.href=\'<a href="https://twitter.com/intent/tweet?text=" rel="nofollow">https://twitter.com/intent/tweet?text=</a>$title&amp;url=$node_url\';">Tweet</button> <button class="btn btn-facebook" onclick="location.href=\'<a href="http://www.facebook.com/sharer/sharer.php?u=" rel="nofollow">http://www.facebook.com/sharer/sharer.php?u=</a>$node_url\';">Facebook</button>
</p>';
      $block['subject'] = t('MYMODULE shared');
      $block['content']['MYMODULE_list'] = $node_shared;
      $block['content']['MYMODULE_more'] = array(
        '#theme' => 'more_link',
        '#url' => 'MYMODULE',
        '#title' => t('Read the latest MYMODULE entries.'),
      );
      return $block;
}
function MYMODULE_block($op = 'list', $delta = 0, $edit = array()) {
  $blocks = array();
  if ($op == 'list') {
    $blocks[0]['info'] = t("MYMODULE's block");
    $blocks[0]['cache'] = BLOCK_CACHE_PER_PAGE;
    $blocks[0]['css'] = array(drupal_get_path('module', 'MYMODULE') .'/MYMODULE.css');
    $blocks[0]['js'] = array(drupal_get_path('module', 'MYMODULE') .'/MYMODULE.js');
  }
  return $blocks;
}
?>

<?php
function MYMODULE_node_view($node, $view_mode, $langcode) {
  // nella visualizzazione del nodo intero
  if ($view_mode == 'full') {
    // creo il markup.. ma utilizzare una funzione di theme custom
    // potrebbe semplificare e rendere piu pulito il codice
    $alias = drupal_get_path_alias('node/' . $node->nid);
    $markup = 'creo il mio markup..' . $node->title . ' ' . $alias;
    $node->content['my_social_sharing'] = array(
      '#markup' => $markup,
      '#weight' => 10,
    );
    //attach del css
    $node->content['#attached']['css'][] = drupal_get_path('module', 'MYMODULE') . '/mio_css.css';
  }
}
?>

<?php
  $path = current_path();
  $alias = drupal_get_path_alias($path);
  $title = drupal_get_title();
?>

<?php
/**
 * Implements hook_node_view()
 */
function MYMODULE_node_view($node, $view_mode, $langcode) {
  // nella visualizzazione del nodo intero
  if ($view_mode == 'full') {
    // sharing
    $node->content['my_social_sharing'] = array(
      '#theme' => 'my_social_sharing',
      '#title' => $node->title,
      '#path' =>  drupal_get_path_alias('node/' . $node->nid),
      '#weight' => 10,
    );
    //attach css
    $node->content['#attached']['css'][] = drupal_get_path('module', 'MYMODULE') . '/mio_css.css';
  }
}
/**
 * Implements hook_theme()
 */
function MYMODULE_theme() {
  return array(
    'my_social_sharing' => array(
      'variables' => array('title' => NULL, 'path' => NULL)
    )
  );
}
/**
 * theme function my_social_sharing
 */
function theme_my_social_sharing(&$variables) {
  $title = $variables['title'];
  $path = $variables['path'];
  $output = '<div>creo il mio markup..' . $title . ' ' . $path .'</div>';
  return $output;
}
?>