gnu-social/plugins/BitlyUrl/BitlyUrlPlugin.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Plugin to use bit.ly URL shortening services.
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package StatusNet
* @author Craig Andrews <candrews@integralblue.com>
* @author Brion Vibber <brion@status.net>
* @copyright 2009 Free Software Foundation, Inc http://www.fsf.org
* @copyright 2010 StatusNet, Inc http://status.net/
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
class BitlyUrlPlugin extends UrlShortenerPlugin
{
public $shortenerName = 'bit.ly';
public $serviceUrl = 'http://bit.ly/api?method=shorten&version=2.0.1&longUrl=%s';
public $login; // To set a site-default when admins or users don't override it.
public $apiKey;
function onInitializePlugin(){
parent::onInitializePlugin();
if(!isset($this->serviceUrl)){
throw new Exception(_m("You must specify a serviceUrl for bit.ly shortening."));
}
}
/**
* Add bit.ly to the list of available URL shorteners if it's configured,
* otherwise leave it out.
*
* @param array $shorteners
* @return boolean hook return value
*/
function onGetUrlShorteners(&$shorteners)
{
if ($this->getLogin() && $this->getApiKey()) {
return parent::onGetUrlShorteners($shorteners);
}
return true;
}
/**
* Short a URL
* @param url
* @return string shortened version of the url, or null if URL shortening failed
*/
protected function shorten($url) {
$response = $this->query($url);
if ($this->isOk($url, $response)) {
return $this->decode($url, $response->getBody());
} else {
return null;
}
}
/**
* Get the user's or site-wide default bit.ly login name.
*
* @return string
*/
protected function getLogin()
{
$login = common_config('bitly', 'default_login');
if (!$login) {
$login = $this->login;
}
return $login;
}
/**
* Get the user's or site-wide default bit.ly API key.
*
* @return string
*/
protected function getApiKey()
{
$key = common_config('bitly', 'default_apikey');
if (!$key) {
$key = $this->apiKey;
}
return $key;
}
/**
* Inject API key into query before sending out...
*
* @param string $url
* @return HTTPResponse
*/
protected function query($url)
{
// http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/shorten
$params = http_build_query(array(
'login' => $this->getLogin(),
'apiKey' => $this->getApiKey()), '', '&');
$serviceUrl = sprintf($this->serviceUrl, urlencode($url)) . '&' . $params;
$request = HTTPClient::start();
return $request->get($serviceUrl);
}
/**
* JSON decode for API result
*/
protected function decode($url, $body)
{
$json = json_decode($body, true);
return $json['results'][$url]['shortUrl'];
}
/**
* JSON decode for API result
*/
protected function isOk($url, $response)
{
$code = 'unknown';
$msg = '';
if ($response->isOk()) {
$body = $response->getBody();
common_log(LOG_INFO, $body);
$json = json_decode($body, true);
if ($json['statusCode'] == 'OK') {
if (!isset($json['results'][$url])) {
common_log(LOG_ERR, "bit.ly returned OK response, but didn't find expected URL $url in $body");
return false;
}
$data = $json['results'][$url];
if (isset($data['shortUrl'])) {
return true;
} else if (isset($data['statusCode']) && $data['statusCode'] == 'ERROR') {
$code = $data['errorCode'];
$msg = $data['errorMessage'];
}
} else if ($json['statusCode'] == 'ERROR') {
$code = $json['errorCode'];
$msg = $json['errorMessage'];
}
common_log(LOG_ERR, "bit.ly returned error $code $msg for $url");
}
return false;
}
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function onPluginVersion(&$versions)
{
$versions[] = array('name' => sprintf('BitlyUrl (%s)', $this->shortenerName),
'version' => STATUSNET_VERSION,
'author' => 'Craig Andrews, Brion Vibber',
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'homepage' => 'http://status.net/wiki/Plugin:BitlyUrl',
'rawdescription' =>
sprintf(_m('Uses <a href="http://%1$s/">%1$s</a> URL-shortener service.'),
$this->shortenerName));
return true;
}
/**
* Hook for RouterInitialized event.
*
* @param Net_URL_Mapper $m path-to-action mapper
* @return boolean hook return
*/
function onRouterInitialized($m)
{
$m->connect('admin/bitly',
array('action' => 'bitlyadminpanel'));
return true;
}
/**
* If the plugin's installed, this should be accessible to admins.
*/
function onAdminPanelCheck($name, &$isOK)
{
if ($name == 'bitly') {
$isOK = true;
return false;
}
return true;
}
/**
* Add the bit.ly admin panel to the list...
*/
function onEndAdminPanelNav($nav)
{
if (AdminPanelAction::canAdmin('bitly')) {
$action_name = $nav->action->trimmed('action');
$nav->out->menuItem(common_local_url('bitlyadminpanel'),
_m('bit.ly'),
_m('bit.ly URL shortening'),
$action_name == 'bitlyadminpanel',
'nav_bitly_admin_panel');
}
return true;
}
/**
* Automatically load the actions and libraries used by the plugin
*
* @param Class $cls the class
*
* @return boolean hook return
*
*/
function onAutoload($cls)
{
$base = dirname(__FILE__);
$lower = strtolower($cls);
switch ($lower) {
case 'bitlyadminpanelaction':
require_once "$base/$lower.php";
return false;
default:
return true;
}
}
/**
* Internal hook point to check the default global credentials so
* the admin form knows if we have a fallback or not.
*
* @param string $login
* @param string $apiKey
* @return boolean hook return value
*/
function onBitlyDefaultCredentials(&$login, &$apiKey)
{
$login = $this->login;
$apiKey = $this->apiKey;
return false;
}
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}