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<?php
/**
* Elgg Twitter Service
* This service plugin allows users to authenticate their Elgg account with Twitter.
*
* @package TwitterService
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @copyright Curverider Ltd 2008-2010
*/
register_elgg_event_handler('init', 'system', 'twitterservice_init');
function twitterservice_init() {
$notice_id = 'twitter_services_disable';
if (!is_plugin_enabled('oauth_lib')) {
// disable the plugin
disable_plugin('twitterservice');
// alert the admin
if (!elgg_admin_notice_exists($notice_id)) {
elgg_add_admin_notice($notice_id, elgg_echo('twitterservice:requires_oauth'));
}
} else {
// cleanup notices
elgg_delete_admin_notice($notice_id);
// require libraries
$base = elgg_get_plugins_path() . 'twitterservice';
require_once "$base/vendors/twitteroauth/twitterOAuth.php";
require_once "$base/twitterservice_lib.php";
// extend site views
elgg_extend_view('metatags', 'twitterservice/metatags');
elgg_extend_view('css', 'twitterservice/css');
// sign on with twitter
if (twitterservice_allow_sign_on_with_twitter()) {
elgg_extend_view('login/extend', 'twitterservice/login');
}
// register page handler
register_page_handler('twitterservice', 'twitterservice_pagehandler');
// register Walled Garden public pages
register_plugin_hook('public_pages', 'walled_garden', 'twitterservice_public_pages');
// allow plugin authors to hook into this service
register_plugin_hook('tweet', 'twitter_service', 'twitterservice_tweet');
}
}
function twitterservice_pagehandler($page) {
if (!isset($page[0])) {
forward();
}
switch ($page[0]) {
case 'authorize':
twitterservice_authorize();
break;
case 'revoke':
twitterservice_revoke();
break;
case 'forward':
twitterservice_forward();
break;
case 'login':
twitterservice_login();
break;
default:
forward();
break;
}
}
function twitterservice_tweet($hook, $entity_type, $returnvalue, $params) {
static $plugins;
if (!$plugins) {
$plugins = trigger_plugin_hook('plugin_list', 'twitter_service', NULL, array());
}
// ensure valid plugin
if (!in_array($params['plugin'], $plugins)) {
return NULL;
}
// check admin settings
$consumer_key = get_plugin_setting('consumer_key', 'twitterservice');
$consumer_secret = get_plugin_setting('consumer_secret', 'twitterservice');
if (!($consumer_key && $consumer_secret)) {
return NULL;
}
// check user settings
$user_id = elgg_get_logged_in_user_guid();
$access_key = get_plugin_usersetting('access_key', $user_id, 'twitterservice');
$access_secret = get_plugin_usersetting('access_secret', $user_id, 'twitterservice');
if (!($access_key && $access_secret)) {
return NULL;
}
// send tweet
$api = new TwitterOAuth($consumer_key, $consumer_secret, $access_key, $access_secret);
$response = $api->post('statuses/update', array('status' => $params['message']));
return TRUE;
}
function twitterservice_fetch_tweets($user_id, $options=array()) {
// check admin settings
$consumer_key = get_plugin_setting('consumer_key', 'twitterservice');
$consumer_secret = get_plugin_setting('consumer_secret', 'twitterservice');
if (!($consumer_key && $consumer_secret)) {
return FALSE;
}
// check user settings
$access_key = get_plugin_usersetting('access_key', $user_id, 'twitterservice');
$access_secret = get_plugin_usersetting('access_secret', $user_id, 'twitterservice');
if (!($access_key && $access_secret)) {
return FALSE;
}
// fetch tweets
$api = new TwitterOAuth($consumer_key, $consumer_secret, $access_key, $access_secret);
return $api->get('statuses/user_timeline', $options);
}
function twitterservice_public_pages($hook, $type, $return_value, $params) {
$return_value[] = 'pg/twitterservice/forward';
$return_value[] = 'pg/twitterservice/login';
return $return_value;
}
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