tweet_this

<?php


/**
 * Implements hook_node_view().
 */
function tweet_this_node_view($node, $view_mode, $langcode) {
  if ($view_mode == "full" && $node->type == "article") {
    _tweet_this_generate_button($node);
  }
}
function _tweet_this_generate_button(&$node) {
  $href = _tweet_this_prepare_url_string($node);
  $node->content['tweet_this']['#markup'] = "<button href='$href'>Tweet This!</button>";
  $node->content['tweet_this']['#weight'] = 15;
}

/**
 * Uses node values to generate the appropriate intent url
 */
function _tweet_this_prepare_url_string($node) {
  $twitter_url = 'https://twitter.com/intent/tweet?';
  $twitter_url .= 'text=' . urlencode($node->title),
  $twitter_url .= '&hashtags=' . $node->field_category[LANGUAGE_NONE][0]['taxonomy_term']->name;
  $twitter_url .= '&url=' . url(current_path(), array('absolute' => TRUE));
  return $twitter_url;
}