twitter.module

<?php
/**
 * @file twitter.module
 *   Twitter API for Drupal
 *
 * @author Raymond Jelierse
 */

/**
 * Implements hook_init()
 */
function twitter_init() {
  drupal_set_html_head('<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>');
}

/**
 * Implements hook_menu()
 */
function twitter_menu() {
  return array(
    'admin/settings/twitter' => array(
      'title' => 'Twitter',
      'description' => 'Manage Twitter settings',
      'page callback' => 'drupal_get_form',
      'page arguments' => array('twitter_settings_form'),
      'access arguments' => array('administer twitter'),
    ),
  );
}

/**
 * Implements hook_perm()
 */
function twitter_perm() {
  return array('administer twitter');
}

/**
 * Implements hook_theme()
 */
function twitter_theme() {
  return array(
    'twitter_share' => array(
      'arguments' => array('node' => NULL),
    ),
  );
}

/**
 * Implements hook_nodeapi()
 */
function twitter_nodeapi(&$node, $operation, $data1, $data2) {
  switch ($operation) {
    case 'view':
      $node->content['twitter_share'] = array(
        '#value' => theme('twitter_share', $node),
      );
      $node->twitter_share_rendered = drupal_render($node->content['twitter_share']);
      break;
  }
}

/**
 * Theme the Twitter Share button
 *
 * @return
 *   The HTML for a Twitter Share button
 */
function theme_twitter_share($node) {
  $share_string = variable_get('twitter_share_string', '');
  if (!empty($share_string)) {
    $share_string = token_replace_multiple($share_string, array('global' => NULL, 'node' => $node));
  }
  else {
    $share_string = drupal_get_title();
  }

  $query = array(
    'text' => $share_string,
    'url' => url($node->path, array('absolute' => TRUE)),
    'via' => variable_get('twitter_site_account', ''),
    'count' => 'horizontal',
  );

  $path = 'https://www.twitter.com/share';

  return sprintf('<a href="%s" class="twitter-share-button">Tweet</a>', url($path, array('query' => $query)));
}

/**
 * Twitter settings
 *
 * @return
 *   The Twitter settings form.
 */
function twitter_settings_form() {
  return system_settings_form(array(
    'twitter_site_account' => array(
      '#type' => 'textfield',
      '#title' => t('Site wide Twitter account'),
      '#default_value' => variable_get('twitter_site_account', ''),
    ),
    'twitter_share_string' => array(
      '#type' => 'textfield',
      '#title' => t('Text for sharing a node via Twitter'),
      '#default_value' => variable_get('twitter_share_string', ''),
    ),
    'twitter_share_string_help' => array(
      '#type' => 'fieldset',
      '#title' => t('Replacement patterns'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#description' => t('Use -raw replacements for text to avoid problems with HTML entities.'),
      'help' => array(
        '#type' => 'markup',
        '#value' => theme('token_tree', array('node'), TRUE, TRUE),
      ),
    ),
  ));
}