twitter_signin.module in Twitter 6.3

File

twitter_signin/twitter_signin.module

<?php

/**
 * Implementation of hook_menu().
 */
function twitter_signin_menu() {
  $items = array();
  $items['twitter/redirect'] = array(
    'title' => 'Twitter Redirect',
    'page callback' => 'twitter_signin_redirect',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  $items['admin/settings/twitter/signin'] = array(
    'title' => 'Sign-in',
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'twitter_signin_admin_settings',
    ),
    'access arguments' => array(
      'administer site configuration',
    ),
    'file' => 'twitter_signin.pages.inc',
    'type' => MENU_LOCAL_TASK,
    'weight' => 5,
  );
  return $items;
}

/**
 * Implementation of hook_block().
 */
function twitter_signin_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
      $block[0]['info'] = t('Sign in with Twitter');
      return $block;
    case 'view':
      global $user;
      if (!$user->uid && _twitter_use_oauth()) {
        $block['subject'] = t('Sign in with Twitter');
        $block['content'] = twitter_signin_button();
        return $block;
      }
  }
}

/**
 * Returns an image link for signing in with Twitter.
 */
function twitter_signin_button() {
  return theme('twitter_signin_button');
}

/**
 * Implements hook_theme().
 */
function twitter_signin_theme() {
  return array(
    'twitter_signin_button' => array(),
  );
}

/**
 * Themable function for an image link for signing in with Twitter.
 */
function theme_twitter_signin_button() {
  $img_path = drupal_get_path('module', 'twitter_signin') . '/images/';
  $img = $img_path . variable_get('twitter_signin_button', 'Sign-in-with-Twitter-lighter-small.png');
  return l(theme('image', $img, t('Sign in with Twitter')), 'twitter/redirect', array(
    'html' => TRUE,
  ));
}

/**
 * Submit handler for Twitter signin.
 */
function twitter_signin_redirect() {
  module_load_include('php', 'oauth_common', 'lib/OAuth');
  module_load_include('inc', 'twitter');
  $key = variable_get('twitter_consumer_key', '');
  $secret = variable_get('twitter_consumer_secret', '');
  $twitter = new TwitterOAuth($key, $secret);
  $token = $twitter
    ->get_request_token();
  $_SESSION['twitter_oauth']['token'] = $token;
  $_SESSION['twitter_oauth']['destination'] = referer_uri();
  $_SESSION['twitter_oauth']['signin'] = TRUE;
  drupal_goto($twitter
    ->get_authenticate_url($token));
}

/**
 * Implementation of hook_form_alter().
 */
function twitter_signin_form_alter(&$form, $form_state, $form_id) {

  // This only applies if we've got OAuth / signin enabled.
  if (!_twitter_use_oauth()) {
    return;
  }
  if ($form_id == 'twitter_oauth_callback' && isset($_SESSION['twitter_oauth']['signin'])) {
    $form['#submit'] = array_merge(array(
      'twitter_signin_oauth_callback_submit',
    ), $form['#submit']);
  }
  if ($form_id == 'user_login' || $form_id == 'user_login_block') {
    $items = array();
    $items[] = twitter_signin_button();
    $form['twitter_signin'] = array(
      '#value' => theme('item_list', $items),
    );
  }
  elseif ($form_id == 'user_register' && isset($_SESSION['twitter']['values'])) {
    $form['name']['#default_value'] = $_SESSION['twitter']['values']['screen_name'];
    $form['auth_twitter'] = array(
      '#type' => 'hidden',
      '#value' => $_SESSION['twitter']['values']['user_id'],
    );
  }
}

/**
 * Form submit for the OAuth callback. Here we add in sign-in specific handling.
 */
function twitter_signin_oauth_callback_submit(&$form, &$form_state) {
  global $user;
  $success = FALSE;
  $key = variable_get('twitter_consumer_key', '');
  $secret = variable_get('twitter_consumer_secret', '');
  $response = $form_state['twitter_oauth']['response'];
  $account = user_external_load($response['user_id']);
  if (isset($account->uid)) {
    user_external_login($account, $response);
    $form_state['twitter_oauth']['account'] = $account;
    $success = TRUE;
  }
  elseif ($uid = db_result(db_query("SELECT uid FROM {twitter_account} WHERE twitter_uid= %d", $response['user_id']))) {

    // We have an existing Twitter account - set it up for login.
    $account = user_load($uid);
    $edit["authname_twitter"] = $response['user_id'];
    user_save($account, $edit);
    $user = $account;
    $form_state['twitter_oauth']['account'] = $account;
    $success = TRUE;
  }
  else {

    // No existing user account, let's see if we can register.
    if (variable_get('twitter_signin_register', 0)) {

      // Check for a nickname collision.
      $account = user_load(array(
        'name' => $response['screen_name'],
      ));
      if (!$account->uid) {
        $edit = array(
          'name' => $response['screen_name'],
          'pass' => user_password(),
          'init' => $response['screen_name'],
          'status' => 1,
          "authname_twitter" => $response['user_id'],
          'access' => time(),
        );
        $account = user_save('', $edit);
        $user = $account;
        $success = TRUE;
      }
      else {
        drupal_set_message(t('The nickname %name is already in use on this site, please register below with a new nick name, or @login to continue.', array(
          '%name' => $response['screen_name'],
          '@login' => url('user/login'),
        )), 'warning');
      }
    }
    else {
      drupal_set_message(t('Please complete the following registration form to create your new account on %site', array(
        '%site' => variable_get('site_name', ''),
      )));
    }
  }
  if (!$success) {
    $_SESSION['twitter']['values'] = $response;
    drupal_goto('user/register');
  }
}

/**
 * Implementation of hook_user().
 *
 * Relates a Twitter account with a just created user account if the user
 * signed in with Twitter but did not have an account in the site yet.
 */
function twitter_signin_user($op, &$edit, &$account, $category = NULL) {
  switch ($op) {
    case 'insert':
    case 'login':
      if (isset($_SESSION['twitter']['values'])) {
        module_load_include('lib.php', 'oauth');
        module_load_include('inc', 'twitter');
        $key = variable_get('twitter_consumer_key', '');
        $secret = variable_get('twitter_consumer_secret', '');
        $response = $_SESSION['twitter']['values'];
        $twitter = new TwitterOAuth($key, $secret, $response['oauth_token'], $response['oauth_token_secret']);
        $twitter_account = $twitter
          ->users_show($response['screen_name']);
        $twitter_account
          ->set_auth($response);
        twitter_account_save($twitter_account, TRUE, $account);
        unset($_SESSION['twitter']);
        drupal_set_message(t('You have related a Twitter account with your user. Next time you can sign in with Twitter.'));
      }
      break;
  }
}

Functions

Name	Description
theme_twitter_signin_button	Themable function for an image link for signing in with Twitter.
twitter_signin_block	Implementation of hook_block().
twitter_signin_button	Returns an image link for signing in with Twitter.
twitter_signin_form_alter	Implementation of hook_form_alter().
twitter_signin_menu	Implementation of hook_menu().
twitter_signin_oauth_callback_submit	Form submit for the OAuth callback. Here we add in sign-in specific handling.
twitter_signin_redirect	Submit handler for Twitter signin.
twitter_signin_theme	Implements hook_theme().
twitter_signin_user	Implementation of hook_user().