<?php
/**
 * Name: StatusNet Connector
 * Description: Relay public postings to a connected StatusNet account
 * Version: 1.0.5
 * Author: Tobias Diekershoff <http://diekershoff.homeunix.net/friendika/profile/tobias>
 */
 
/*   StatusNet Plugin for Friendica
 *
 *   Author: Tobias Diekershoff
 *           tobias.diekershoff@gmx.net
 *
 *   License:3-clause BSD license
 *
 *   Configuration:
 *     To activate the plugin itself add it to the $a->config['system']['addon']
 *     setting. After this, your user can configure their Twitter account settings
 *     from "Settings -> Plugin Settings".
 *
 *     Requirements: PHP5, curl [Slinky library]
 *
 *     Documentation: http://diekershoff.homeunix.net/redmine/wiki/friendikaplugin/StatusNet_Plugin
 */

/***
 * We have to alter the TwitterOAuth class a little bit to work with any StatusNet
 * installation abroad. Basically it's only make the API path variable and be happy.
 *
 * Thank you guys for the Twitter compatible API!
 */

define('STATUSNET_DEFAULT_POLL_INTERVAL', 5); // given in minutes

require_once('library/twitteroauth.php');

class StatusNetOAuth extends TwitterOAuth {
    function get_maxlength() {
        $config = $this->get($this->host . 'statusnet/config.json');
        return $config->site->textlimit;
    }
    function accessTokenURL()  { return $this->host.'oauth/access_token'; }
    function authenticateURL() { return $this->host.'oauth/authenticate'; } 
    function authorizeURL() { return $this->host.'oauth/authorize'; }
    function requestTokenURL() { return $this->host.'oauth/request_token'; }
    function __construct($apipath, $consumer_key, $consumer_secret, $oauth_token = NULL, $oauth_token_secret = NULL) {
        parent::__construct($consumer_key, $consumer_secret, $oauth_token, $oauth_token_secret);
        $this->host = $apipath;
    }
  /**
   * Make an HTTP request
   *
   * @return API results
   *
   * Copied here from the twitteroauth library and complemented by applying the proxy settings of friendica
   */
  function http($url, $method, $postfields = NULL) {
    $this->http_info = array();
    $ci = curl_init();
    /* Curl settings */
    $prx = get_config('system','proxy');
    if(strlen($prx)) {
        curl_setopt($ci, CURLOPT_HTTPPROXYTUNNEL, 1);
        curl_setopt($ci, CURLOPT_PROXY, $prx);
        $prxusr = get_config('system','proxyuser');
        if(strlen($prxusr))
            curl_setopt($ci, CURLOPT_PROXYUSERPWD, $prxusr);
    }
    curl_setopt($ci, CURLOPT_USERAGENT, $this->useragent);
    curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, $this->connecttimeout);
    curl_setopt($ci, CURLOPT_TIMEOUT, $this->timeout);
    curl_setopt($ci, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ci, CURLOPT_HTTPHEADER, array('Expect:'));
    curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, $this->ssl_verifypeer);
    curl_setopt($ci, CURLOPT_HEADERFUNCTION, array($this, 'getHeader'));
    curl_setopt($ci, CURLOPT_HEADER, FALSE);

    switch ($method) {
      case 'POST':
        curl_setopt($ci, CURLOPT_POST, TRUE);
        if (!empty($postfields)) {
          curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
        }
        break;
      case 'DELETE':
        curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE');
        if (!empty($postfields)) {
          $url = "{$url}?{$postfields}";
        }
    }

    curl_setopt($ci, CURLOPT_URL, $url);
    $response = curl_exec($ci);
    $this->http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
    $this->http_info = array_merge($this->http_info, curl_getinfo($ci));
    $this->url = $url;
    curl_close ($ci);
    return $response;
  }
}

function statusnet_install() {
	//  we need some hooks, for the configuration and for sending tweets
	register_hook('connector_settings', 'addon/statusnet/statusnet.php', 'statusnet_settings'); 
	register_hook('connector_settings_post', 'addon/statusnet/statusnet.php', 'statusnet_settings_post');
	register_hook('notifier_normal', 'addon/statusnet/statusnet.php', 'statusnet_post_hook');
	register_hook('post_local', 'addon/statusnet/statusnet.php', 'statusnet_post_local');
	register_hook('jot_networks',    'addon/statusnet/statusnet.php', 'statusnet_jot_nets');
	register_hook('cron', 'addon/statusnet/statusnet.php', 'statusnet_cron');
	logger("installed statusnet");
}


function statusnet_uninstall() {
	unregister_hook('connector_settings', 'addon/statusnet/statusnet.php', 'statusnet_settings'); 
	unregister_hook('connector_settings_post', 'addon/statusnet/statusnet.php', 'statusnet_settings_post');
	unregister_hook('notifier_normal', 'addon/statusnet/statusnet.php', 'statusnet_post_hook');
	unregister_hook('post_local', 'addon/statusnet/statusnet.php', 'statusnet_post_local');
	unregister_hook('jot_networks',    'addon/statusnet/statusnet.php', 'statusnet_jot_nets');
	unregister_hook('cron', 'addon/statusnet/statusnet.php', 'statusnet_cron');

	// old setting - remove only
	unregister_hook('post_local_end', 'addon/statusnet/statusnet.php', 'statusnet_post_hook');
	unregister_hook('plugin_settings', 'addon/statusnet/statusnet.php', 'statusnet_settings'); 
	unregister_hook('plugin_settings_post', 'addon/statusnet/statusnet.php', 'statusnet_settings_post');

}

function statusnet_jot_nets(&$a,&$b) {
	if(! local_user())
		return;

	$statusnet_post = get_pconfig(local_user(),'statusnet','post');
	if(intval($statusnet_post) == 1) {
		$statusnet_defpost = get_pconfig(local_user(),'statusnet','post_by_default');
		$selected = ((intval($statusnet_defpost) == 1) ? ' checked="checked" ' : '');
		$b .= '<div class="profile-jot-net"><input type="checkbox" name="statusnet_enable"' . $selected . ' value="1" /> ' 
			. t('Post to StatusNet') . '</div>';
	}
}

function statusnet_settings_post ($a,$post) {
	if(! local_user())
	    return;
	// don't check statusnet settings if statusnet submit button is not clicked
	if (!x($_POST,'statusnet-submit')) return;
	
	if (isset($_POST['statusnet-disconnect'])) {
            /***
             * if the statusnet-disconnect checkbox is set, clear the statusnet configuration
             */
            del_pconfig(local_user(), 'statusnet', 'consumerkey');
            del_pconfig(local_user(), 'statusnet', 'consumersecret');
            del_pconfig(local_user(), 'statusnet', 'post');
            del_pconfig(local_user(), 'statusnet', 'post_by_default');
            del_pconfig(local_user(), 'statusnet', 'oauthtoken');
            del_pconfig(local_user(), 'statusnet', 'oauthsecret');
            del_pconfig(local_user(), 'statusnet', 'baseapi');
            del_pconfig(local_user(), 'statusnet', 'post_taglinks');
            del_pconfig(local_user(), 'statusnet', 'lastid');
            del_pconfig(local_user(), 'statusnet', 'mirror_posts');
            del_pconfig(local_user(), 'statusnet', 'intelligent_shortening');
	} else {
            if (isset($_POST['statusnet-preconf-apiurl'])) {
                /***
                 * If the user used one of the preconfigured StatusNet server credentials
                 * use them. All the data are available in the global config.
                 * Check the API Url never the less and blame the admin if it's not working ^^
                 */
                $globalsn = get_config('statusnet', 'sites');
                foreach ( $globalsn as $asn) {
                    if ($asn['apiurl'] == $_POST['statusnet-preconf-apiurl'] ) {
                        $apibase = $asn['apiurl'];
                        $c = fetch_url( $apibase . 'statusnet/version.xml' );
                        if (strlen($c) > 0) {
                            set_pconfig(local_user(), 'statusnet', 'consumerkey', $asn['consumerkey'] );
                            set_pconfig(local_user(), 'statusnet', 'consumersecret', $asn['consumersecret'] );
                            set_pconfig(local_user(), 'statusnet', 'baseapi', $asn['apiurl'] );
                            set_pconfig(local_user(), 'statusnet', 'application_name', $asn['applicationname'] );
                        } else {
                            notice( t('Please contact your site administrator.<br />The provided API URL is not valid.').EOL.$asn['apiurl'].EOL );
                        }
                    }
                }
                goaway($a->get_baseurl().'/settings/connectors');
            } else {
            if (isset($_POST['statusnet-consumersecret'])) {
                //  check if we can reach the API of the StatusNet server
                //  we'll check the API Version for that, if we don't get one we'll try to fix the path but will
                //  resign quickly after this one try to fix the path ;-)
                $apibase = $_POST['statusnet-baseapi'];
                $c = fetch_url( $apibase . 'statusnet/version.xml' );
                if (strlen($c) > 0) {
                    //  ok the API path is correct, let's save the settings
                    set_pconfig(local_user(), 'statusnet', 'consumerkey', $_POST['statusnet-consumerkey']);
                    set_pconfig(local_user(), 'statusnet', 'consumersecret', $_POST['statusnet-consumersecret']);
                    set_pconfig(local_user(), 'statusnet', 'baseapi', $apibase );
                    set_pconfig(local_user(), 'statusnet', 'application_name', $_POST['statusnet-applicationname'] );
                } else {
                    //  the API path is not correct, maybe missing trailing / ?
                    $apibase = $apibase . '/';
                    $c = fetch_url( $apibase . 'statusnet/version.xml' );
                    if (strlen($c) > 0) {
                        //  ok the API path is now correct, let's save the settings
                        set_pconfig(local_user(), 'statusnet', 'consumerkey', $_POST['statusnet-consumerkey']);
                        set_pconfig(local_user(), 'statusnet', 'consumersecret', $_POST['statusnet-consumersecret']);
                        set_pconfig(local_user(), 'statusnet', 'baseapi', $apibase );
                    } else {
                        //  still not the correct API base, let's do noting
                        notice( t('We could not contact the StatusNet API with the Path you entered.').EOL );
                    }
                }
                goaway($a->get_baseurl().'/settings/connectors');
            } else {
    	        if (isset($_POST['statusnet-pin'])) {
                	//  if the user supplied us with a PIN from StatusNet, let the magic of OAuth happen
                    $api     = get_pconfig(local_user(), 'statusnet', 'baseapi');
					$ckey    = get_pconfig(local_user(), 'statusnet', 'consumerkey'  );
					$csecret = get_pconfig(local_user(), 'statusnet', 'consumersecret' );
					//  the token and secret for which the PIN was generated were hidden in the settings
					//  form as token and token2, we need a new connection to Twitter using these token
					//  and secret to request a Access Token with the PIN
					$connection = new StatusNetOAuth($api, $ckey, $csecret, $_POST['statusnet-token'], $_POST['statusnet-token2']);
					$token   = $connection->getAccessToken( $_POST['statusnet-pin'] );
					//  ok, now that we have the Access Token, save them in the user config
					set_pconfig(local_user(),'statusnet', 'oauthtoken',  $token['oauth_token']);
					set_pconfig(local_user(),'statusnet', 'oauthsecret', $token['oauth_token_secret']);
                                        set_pconfig(local_user(),'statusnet', 'post', 1);
                                        set_pconfig(local_user(),'statusnet', 'post_taglinks', 1);
                    //  reload the Addon Settings page, if we don't do it see Bug #42
                    goaway($a->get_baseurl().'/settings/connectors');
				} else {
					//  if no PIN is supplied in the POST variables, the user has changed the setting
					//  to post a dent for every new __public__ posting to the wall
					set_pconfig(local_user(),'statusnet','post',intval($_POST['statusnet-enable']));
                                        set_pconfig(local_user(),'statusnet','post_by_default',intval($_POST['statusnet-default']));
                                        set_pconfig(local_user(),'statusnet','post_taglinks',intval($_POST['statusnet-sendtaglinks']));
					set_pconfig(local_user(), 'statusnet', 'mirror_posts', intval($_POST['statusnet-mirror']));
					set_pconfig(local_user(), 'statusnet', 'intelligent_shortening', intval($_POST['statusnet-shortening']));
					info( t('StatusNet settings updated.') . EOL);
        	}}}}
}
function statusnet_settings(&$a,&$s) {
        if(! local_user())
                return;
        $a->page['htmlhead'] .= '<link rel="stylesheet"  type="text/css" href="' . $a->get_baseurl() . '/addon/statusnet/statusnet.css' . '" media="all" />' . "\r\n";
	/***
	 * 1) Check that we have a base api url and a consumer key & secret
	 * 2) If no OAuthtoken & stuff is present, generate button to get some
         *    allow the user to cancel the connection process at this step
	 * 3) Checkbox for "Send public notices (respect size limitation)
	 */
        $api     = get_pconfig(local_user(), 'statusnet', 'baseapi');
	$ckey    = get_pconfig(local_user(), 'statusnet', 'consumerkey' );
	$csecret = get_pconfig(local_user(), 'statusnet', 'consumersecret' );
	$otoken  = get_pconfig(local_user(), 'statusnet', 'oauthtoken'  );
	$osecret = get_pconfig(local_user(), 'statusnet', 'oauthsecret' );
	$enabled = get_pconfig(local_user(), 'statusnet', 'post');
	$checked = (($enabled) ? ' checked="checked" ' : '');
	$defenabled = get_pconfig(local_user(),'statusnet','post_by_default');
        $defchecked = (($defenabled) ? ' checked="checked" ' : '');
        $linksenabled = get_pconfig(local_user(),'statusnet','post_taglinks');
        $linkschecked = (($linksenabled) ? ' checked="checked" ' : '');

	$mirrorenabled = get_pconfig(local_user(),'statusnet','mirror_posts');
	$mirrorchecked = (($mirrorenabled) ? ' checked="checked" ' : '');
	$shorteningenabled = get_pconfig(local_user(),'statusnet','intelligent_shortening');
	$shorteningchecked = (($shorteningenabled) ? ' checked="checked" ' : '');

	$s .= '<div class="settings-block">';
	$s .= '<h3>'. t('StatusNet Posting Settings').'</h3>';

	if ( (!$ckey) && (!$csecret) ) {
		/***
		 * no consumer keys
                 */
            $globalsn = get_config('statusnet', 'sites');
            /***
             * lets check if we have one or more globally configured StatusNet
             * server OAuth credentials in the configuration. If so offer them
             * with a little explanation to the user as choice - otherwise
             * ignore this option entirely.
             */
            if (! $globalsn == null) {
                $s .= '<h4>' . t('Globally Available StatusNet OAuthKeys') . '</h4>';
                $s .= '<p>'. t("There are preconfigured OAuth key pairs for some StatusNet servers available. If you are useing one of them, please use these credentials. If not feel free to connect to any other StatusNet instance \x28see below\x29.") .'</p>';
                $s .= '<div id="statusnet-preconf-wrapper">';
                foreach ($globalsn as $asn) {
                    $s .= '<input type="radio" name="statusnet-preconf-apiurl" value="'. $asn['apiurl'] .'">'. $asn['sitename'] .'<br />';
                }
                $s .= '<p></p><div class="clear"></div></div>';
                $s .= '<div class="settings-submit-wrapper" ><input type="submit" name="statusnet-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
            }
            $s .= '<h4>' . t('Provide your own OAuth Credentials') . '</h4>';
            $s .= '<p>'. t('No consumer key pair for StatusNet found. Register your Friendica Account as an desktop client on your StatusNet account, copy the consumer key pair here and enter the API base root.<br />Before you register your own OAuth key pair ask the administrator if there is already a key pair for this Friendica installation at your favorited StatusNet installation.') .'</p>';
            $s .= '<div id="statusnet-consumer-wrapper">';
            $s .= '<label id="statusnet-consumerkey-label" for="statusnet-consumerkey">'. t('OAuth Consumer Key') .'</label>';
            $s .= '<input id="statusnet-consumerkey" type="text" name="statusnet-consumerkey" size="35" /><br />';
            $s .= '<div class="clear"></div>';
            $s .= '<label id="statusnet-consumersecret-label" for="statusnet-consumersecret">'. t('OAuth Consumer Secret') .'</label>';
            $s .= '<input id="statusnet-consumersecret" type="text" name="statusnet-consumersecret" size="35" /><br />';
            $s .= '<div class="clear"></div>';
            $s .= '<label id="statusnet-baseapi-label" for="statusnet-baseapi">'. t("Base API Path \x28remember the trailing /\x29") .'</label>';
            $s .= '<input id="statusnet-baseapi" type="text" name="statusnet-baseapi" size="35" /><br />';
            $s .= '<p></p><div class="clear"></div></div>';
            $s .= '<label id="statusnet-applicationname-label" for="statusnet-applicationname">'.t('StatusNet application name').'</label>';
            $s .= '<input id="statusnet-applicationname" type="text" name="statusnet-applicationname" size="35" /><br />';
            $s .= '<p></p><div class="clear"></div></div>';
            $s .= '<div class="settings-submit-wrapper" ><input type="submit" name="statusnet-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
	} else {
		/***
		 * ok we have a consumer key pair now look into the OAuth stuff
		 */
		if ( (!$otoken) && (!$osecret) ) {
			/***
			 * the user has not yet connected the account to statusnet
			 * get a temporary OAuth key/secret pair and display a button with
			 * which the user can request a PIN to connect the account to a
			 * account at statusnet
			 */
			$connection = new StatusNetOAuth($api, $ckey, $csecret);
			$request_token = $connection->getRequestToken('oob');
			$token = $request_token['oauth_token'];
			/***
			 *  make some nice form
			 */
			$s .= '<p>'. t('To connect to your StatusNet account click the button below to get a security code from StatusNet which you have to copy into the input box below and submit the form. Only your <strong>public</strong> posts will be posted to StatusNet.') .'</p>';
			$s .= '<a href="'.$connection->getAuthorizeURL($token,False).'" target="_statusnet"><img src="addon/statusnet/signinwithstatusnet.png" alt="'. t('Log in with StatusNet') .'"></a>';
			$s .= '<div id="statusnet-pin-wrapper">';
			$s .= '<label id="statusnet-pin-label" for="statusnet-pin">'. t('Copy the security code from StatusNet here') .'</label>';
			$s .= '<input id="statusnet-pin" type="text" name="statusnet-pin" />';
			$s .= '<input id="statusnet-token" type="hidden" name="statusnet-token" value="'.$token.'" />';
			$s .= '<input id="statusnet-token2" type="hidden" name="statusnet-token2" value="'.$request_token['oauth_token_secret'].'" />';
			$s .= '</div><div class="clear"></div>';
			$s .= '<div class="settings-submit-wrapper" ><input type="submit" name="statusnet-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
			$s .= '<h4>'.t('Cancel Connection Process').'</h4>';
			$s .= '<div id="statusnet-cancel-wrapper">';
			$s .= '<p>'.t('Current StatusNet API is').': '.$api.'</p>';
			$s .= '<label id="statusnet-cancel-label" for="statusnet-cancel">'. t('Cancel StatusNet Connection') . '</label>';
			$s .= '<input id="statusnet-cancel" type="checkbox" name="statusnet-disconnect" value="1" />';
			$s .= '</div><div class="clear"></div>';
			$s .= '<div class="settings-submit-wrapper" ><input type="submit" name="statusnet-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
		} else {
			/***
			 *  we have an OAuth key / secret pair for the user
			 *  so let's give a chance to disable the postings to statusnet
			 */
			$connection = new StatusNetOAuth($api,$ckey,$csecret,$otoken,$osecret);
			$details = $connection->get('account/verify_credentials');
			$s .= '<div id="statusnet-info" ><img id="statusnet-avatar" src="'.$details->profile_image_url.'" /><p id="statusnet-info-block">'. t('Currently connected to: ') .'<a href="'.$details->statusnet_profile_url.'" target="_statusnet">'.$details->screen_name.'</a><br /><em>'.$details->description.'</em></p></div>';
			$s .= '<p>'. t('If enabled all your <strong>public</strong> postings can be posted to the associated StatusNet account. You can choose to do so by default (here) or for every posting separately in the posting options when writing the entry.') .'</p>';
                        if ($a->user['hidewall']) {
                            $s .= '<p>'. t('<strong>Note</strong>: Due your privacy settings (<em>Hide your profile details from unknown viewers?</em>) the link potentially included in public postings relayed to StatusNet will lead the visitor to a blank page informing the visitor that the access to your profile has been restricted.') .'</p>';
                        }
			$s .= '<div id="statusnet-enable-wrapper">';
			$s .= '<label id="statusnet-enable-label" for="statusnet-checkbox">'. t('Allow posting to StatusNet') .'</label>';
			$s .= '<input id="statusnet-checkbox" type="checkbox" name="statusnet-enable" value="1" ' . $checked . '/>';
			$s .= '<div class="clear"></div>';
			$s .= '<label id="statusnet-default-label" for="statusnet-default">'. t('Send public postings to StatusNet by default') .'</label>';
			$s .= '<input id="statusnet-default" type="checkbox" name="statusnet-default" value="1" ' . $defchecked . '/>';
			$s .= '<div class="clear"></div>';

			$s .= '<label id="statusnet-mirror-label" for="statusnet-mirror">'.t('Mirror all posts from statusnet that are no replies or repeated messages').'</label>';
			$s .= '<input id="statusnet-mirror" type="checkbox" name="statusnet-mirror" value="1" '. $mirrorchecked . '/>';
			$s .= '<div class="clear"></div>';

			$s .= '<label id="statusnet-shortening-label" for="statusnet-shortening">'.t('Shortening method that optimizes the post').'</label>';
			$s .= '<input id="statusnet-shortening" type="checkbox" name="statusnet-shortening" value="1" '. $shorteningchecked . '/>';
			$s .= '<div class="clear"></div>';

                        $s .= '<label id="statusnet-sendtaglinks-label" for="statusnet-sendtaglinks">'.t('Send linked #-tags and @-names to StatusNet').'</label>';
                        $s .= '<input id="statusnet-sendtaglinks" type="checkbox" name="statusnet-sendtaglinks" value="1" '. $linkschecked . '/>';
			$s .= '</div><div class="clear"></div>';

			$s .= '<div id="statusnet-disconnect-wrapper">';
                        $s .= '<label id="statusnet-disconnect-label" for="statusnet-disconnect">'. t('Clear OAuth configuration') .'</label>';
                        $s .= '<input id="statusnet-disconnect" type="checkbox" name="statusnet-disconnect" value="1" />';
			$s .= '</div><div class="clear"></div>';
			$s .= '<div class="settings-submit-wrapper" ><input type="submit" name="statusnet-submit" class="settings-submit" value="' . t('Submit') . '" /></div>'; 
		}
	}
        $s .= '</div><div class="clear"></div></div>';
}


function statusnet_post_local(&$a,&$b) {
	if($b['edit'])
		return;

	if((local_user()) && (local_user() == $b['uid']) && (! $b['private'])) {

		$statusnet_post = get_pconfig(local_user(),'statusnet','post');
		$statusnet_enable = (($statusnet_post && x($_REQUEST,'statusnet_enable')) ? intval($_REQUEST['statusnet_enable']) : 0);

		// if API is used, default to the chosen settings
		if($_REQUEST['api_source'] && intval(get_pconfig(local_user(),'statusnet','post_by_default')))
			$statusnet_enable = 1;

       if(! $statusnet_enable)
            return;

       if(strlen($b['postopts']))
           $b['postopts'] .= ',';
       $b['postopts'] .= 'statusnet';
    }
}

if (! function_exists( 'short_link' )) {
function short_link($url) {
    require_once('library/slinky.php');
    $slinky = new Slinky( $url );
    $yourls_url = get_config('yourls','url1');
    if ($yourls_url) {
            $yourls_username = get_config('yourls','username1');
            $yourls_password = get_config('yourls', 'password1');
            $yourls_ssl = get_config('yourls', 'ssl1');
            $yourls = new Slinky_YourLS();
            $yourls->set( 'username', $yourls_username );
            $yourls->set( 'password', $yourls_password );
            $yourls->set( 'ssl', $yourls_ssl );
            $yourls->set( 'yourls-url', $yourls_url );
            $slinky->set_cascade( array( $yourls, new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL() ) );
    }
    else {
            // setup a cascade of shortening services
            // try to get a short link from these services
            // in the order ur1.ca, trim, id.gd, tinyurl
            $slinky->set_cascade( array( new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL() ) );
    }
    return $slinky->short();
} };

function statusnet_shortenmsg($b, $max_char) {
	require_once("include/bbcode.php");
	require_once("include/html2plain.php");

	// Looking for the first image
	$image = '';
	if(preg_match("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/is",$b['body'],$matches))
		$image = $matches[3];

	if ($image == '')
		if(preg_match("/\[img\](.*?)\[\/img\]/is",$b['body'],$matches))
			$image = $matches[1];

	$multipleimages = (strpos($b['body'], "[img") != strrpos($b['body'], "[img"));

	// When saved into the database the content is sent through htmlspecialchars
	// That means that we have to decode all image-urls
	$image = htmlspecialchars_decode($image);

	$body = $b["body"];
	if ($b["title"] != "")
		$body = $b["title"]."\n\n".$body;

	if (strpos($body, "[bookmark") !== false) {
		// splitting the text in two parts:
		// before and after the bookmark
		$pos = strpos($body, "[bookmark");
		$body1 = substr($body, 0, $pos);
		$body2 = substr($body, $pos);

		// Removing all quotes after the bookmark
		// they are mostly only the content after the bookmark.
		$body2 = preg_replace("/\[quote\=([^\]]*)\](.*?)\[\/quote\]/ism",'',$body2);
		$body2 = preg_replace("/\[quote\](.*?)\[\/quote\]/ism",'',$body2);
		$body = $body1.$body2;
	}

	// Add some newlines so that the message could be cut better
	$body = str_replace(array("[quote", "[bookmark", "[/bookmark]", "[/quote]"),
				array("\n[quote", "\n[bookmark", "[/bookmark]\n", "[/quote]\n"), $body);

	// remove the recycle signs and the names since they aren't helpful on twitter
	// recycle 1
	$recycle = html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
	$body = preg_replace( '/'.$recycle.'\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', "\n", $body);
	// recycle 2 (Test)
	$recycle = html_entity_decode("&#x25CC; ", ENT_QUOTES, 'UTF-8');
	$body = preg_replace( '/'.$recycle.'\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', "\n", $body);

	// remove the share element
	$body = preg_replace("/\[share(.*?)\](.*?)\[\/share\]/ism","\n\n$2\n\n",$body);

	// At first convert the text to html
	$html = bbcode($body, false, false);

	// Then convert it to plain text
	//$msg = trim($b['title']." \n\n".html2plain($html, 0, true));
	$msg = trim(html2plain($html, 0, true));
	$msg = html_entity_decode($msg,ENT_QUOTES,'UTF-8');

	// Removing multiple newlines
	while (strpos($msg, "\n\n\n") !== false)
		$msg = str_replace("\n\n\n", "\n\n", $msg);

	// Removing multiple spaces
	while (strpos($msg, "  ") !== false)
		$msg = str_replace("  ", " ", $msg);

	// Removing URLs
	$msg = preg_replace('/(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/i', "", $msg);

	$msg = trim($msg);

	$link = '';
	// look for bookmark-bbcode and handle it with priority
	if(preg_match("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/is",$b['body'],$matches))
		$link = $matches[1];

	$multiplelinks = (strpos($b['body'], "[bookmark") != strrpos($b['body'], "[bookmark"));

	// If there is no bookmark element then take the first link
	if ($link == '') {
		$links = collecturls($html);
		if (sizeof($links) > 0) {
			reset($links);
			$link = current($links);
		}
		$multiplelinks = (sizeof($links) > 1);
	}

	$msglink = "";
	if ($multiplelinks)
		$msglink = $b["plink"];
	else if ($link != "")
		$msglink = $link;
	else if ($multipleimages)
		$msglink = $b["plink"];
	else if ($image != "")
		$msglink = $image;

	if (($msglink == "") and strlen($msg) > $max_char)
		$msglink = $b["plink"];

	if (strlen($msglink) > 20)
		$msglink = short_link($msglink);

	if (strlen(trim($msg." ".$msglink)) > $max_char) {
		$msg = substr($msg, 0, $max_char - (strlen($msglink)));
		$lastchar = substr($msg, -1);
		$msg = substr($msg, 0, -1);
		$pos = strrpos($msg, "\n");
		if ($pos > 0)
			$msg = substr($msg, 0, $pos);
		else if ($lastchar != "\n")
			$msg = substr($msg, 0, -3)."...";
	}
	$msg = str_replace("\n", " ", $msg);

	// Removing multiple spaces - again
	while (strpos($msg, "  ") !== false)
		$msg = str_replace("  ", " ", $msg);

	return(array("msg"=>trim($msg." ".$msglink), "image"=>$image));
}

function statusnet_post_hook(&$a,&$b) {

	/**
	 * Post to statusnet
	 */

	if($b['deleted'] || $b['private'] || ($b['created'] !== $b['edited']))
		return;

	if(! strstr($b['postopts'],'statusnet'))
		return;

	// if posts comes from statusnet don't send it back
	if($b['app'] == "StatusNet")
		return;

        logger('statusnet post invoked');

	load_pconfig($b['uid'], 'statusnet');

	$api     = get_pconfig($b['uid'], 'statusnet', 'baseapi');
	$ckey    = get_pconfig($b['uid'], 'statusnet', 'consumerkey');
	$csecret = get_pconfig($b['uid'], 'statusnet', 'consumersecret');
	$otoken  = get_pconfig($b['uid'], 'statusnet', 'oauthtoken');
	$osecret = get_pconfig($b['uid'], 'statusnet', 'oauthsecret');
	$intelligent_shortening = get_pconfig($b['uid'], 'statusnet', 'intelligent_shortening');

	// Global setting overrides this
	if (get_config('statusnet','intelligent_shortening'))
		$intelligent_shortening = get_config('statusnet','intelligent_shortening');

	if($ckey && $csecret && $otoken && $osecret) {

		require_once('include/bbcode.php');
		$dent = new StatusNetOAuth($api,$ckey,$csecret,$otoken,$osecret);
                $max_char = $dent->get_maxlength(); // max. length for a dent
                // we will only work with up to two times the length of the dent
                // we can later send to StatusNet. This way we can "gain" some
                // information during shortening of potential links but do not
                // shorten all the links in a 200000 character long essay.

		$tempfile = "";
		$intelligent_shortening = get_config('statusnet','intelligent_shortening');
		if (!$intelligent_shortening) {
	                if (! $b['title']=='') {
				$tmp = $b['title'].": \n".$b['body'];
	//                    $tmp = substr($tmp, 0, 4*$max_char);
        	        } else {
                	    $tmp = $b['body']; // substr($b['body'], 0, 3*$max_char);
	                }
        	        // if [url=bla][img]blub.png[/img][/url] get blub.png
                	$tmp = preg_replace( '/\[url\=(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)\]\[img\](\\w+.*?)\\[\\/img\]\\[\\/url\]/i', '$2', $tmp);
	                // preserve links to images, videos and audios
        	        $tmp = preg_replace( '/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism', '$3', $tmp);
                	$tmp = preg_replace( '/\[\\/?img(\\s+.*?\]|\])/i', '', $tmp);
	                $tmp = preg_replace( '/\[\\/?video(\\s+.*?\]|\])/i', '', $tmp);
        	        $tmp = preg_replace( '/\[\\/?youtube(\\s+.*?\]|\])/i', '', $tmp);
                	$tmp = preg_replace( '/\[\\/?vimeo(\\s+.*?\]|\])/i', '', $tmp);
	                $tmp = preg_replace( '/\[\\/?audio(\\s+.*?\]|\])/i', '', $tmp);
        	        $linksenabled = get_pconfig($b['uid'],'statusnet','post_taglinks');
	                // if a #tag is linked, don't send the [url] over to SN
	                // that is, don't send if the option is not set in the 
        	        // connector settings
                	if ($linksenabled=='0') {
				// #-tags
				$tmp = preg_replace( '/#\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', '#$2', $tmp);
				// @-mentions
				$tmp = preg_replace( '/@\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', '@$2', $tmp);
				// recycle 1
				$recycle = html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
				$tmp = preg_replace( '/'.$recycle.'\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', $recycle.'$2', $tmp);
				// recycle 2 (test)
				$recycle = html_entity_decode("&#x25CC; ", ENT_QUOTES, 'UTF-8');
				$tmp = preg_replace( '/'.$recycle.'\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', $recycle.'$2', $tmp);
        	        }
                	// preserve links to webpages
	                $tmp = preg_replace( '/\[url\=(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)\](\w+.*?)\[\/url\]/i', '$2 $1', $tmp);
        	        $tmp = preg_replace( '/\[bookmark\=(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)\](\w+.*?)\[\/bookmark\]/i', '$2 $1', $tmp);
                	// find all http or https links in the body of the entry and 
	                // apply the shortener if the link is longer then 20 characters 
        	        if (( strlen($tmp)>$max_char ) && ( $max_char > 0 )) {
                	    preg_match_all ( '/(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/i', $tmp, $allurls  );
	                    foreach ($allurls as $url) {
        	                foreach ($url as $u) {
                	            if (strlen($u)>20) {
                        	        $sl = short_link($u);
                                	$tmp = str_replace( $u, $sl, $tmp );
	                            }
        	                }
                	    }
	                }
	                // ok, all the links we want to send out are save, now strip 
        	        // away the remaining bbcode
			//$msg = strip_tags(bbcode($tmp, false, false));
			$msg = bbcode($tmp, false, false);
			$msg = str_replace(array('<br>','<br />'),"\n",$msg);
			$msg = strip_tags($msg);

			// quotes not working - let's try this
			$msg = html_entity_decode($msg);

			if (( strlen($msg) > $max_char) && $max_char > 0) {
				$shortlink = short_link( $b['plink'] );
				// the new message will be shortened such that "... $shortlink"
				// will fit into the character limit
				$msg = nl2br(substr($msg, 0, $max_char-strlen($shortlink)-4));
        	                $msg = str_replace(array('<br>','<br />'),' ',$msg);
                	        $e = explode(' ', $msg);
                        	//  remove the last word from the cut down message to 
	                        //  avoid sending cut words to the MicroBlog
        	                array_pop($e);
                	        $msg = implode(' ', $e);
				$msg .= '... ' . $shortlink;
			}

			$msg = trim($msg);
			$postdata = array('status' => $msg);
		} else {
			$msgarr = statusnet_shortenmsg($b, $max_char);
			$msg = $msgarr["msg"];
			$image = $msgarr["image"];
			if ($image != "") {
				$imagedata = file_get_contents($image);
				$tempfile = tempnam(get_config("system","temppath"), "upload");
				file_put_contents($tempfile, $imagedata);
				$postdata = array("status"=>$msg, "media"=>"@".$tempfile);
			} else
				$postdata = array("status"=>$msg);
		}

		// and now dent it :-)
		if(strlen($msg)) {
                    //$result = $dent->post('statuses/update', array('status' => $msg));
                    $result = $dent->post('statuses/update', $postdata);
                    logger('statusnet_post send, result: ' . print_r($result, true).
                           "\nmessage: ".$msg, LOGGER_DEBUG."\nOriginal post: ".print_r($b, true)."\nPost Data: ".print_r($postdata, true));
                    if ($result->error) {
                        logger('Send to StatusNet failed: "' . $result->error . '"');
                    }
                }
		if ($tempfile != "")
			unlink($tempfile);
	}
}

function statusnet_plugin_admin_post(&$a){
	
	$sites = array();
	
	foreach($_POST['sitename'] as $id=>$sitename){
		$sitename=trim($sitename);
		$apiurl=trim($_POST['apiurl'][$id]);
		$secret=trim($_POST['secret'][$id]);
		$key=trim($_POST['key'][$id]);
                $applicationname = ((x($_POST, 'applicationname')) ? notags(trim($_POST['applicationname'][$id])):'');
		if ($sitename!="" &&
			$apiurl!="" &&
			$secret!="" &&
			$key!="" &&
			!x($_POST['delete'][$id])){
				
				$sites[] = Array(
					'sitename' => $sitename,
					'apiurl' => $apiurl,
					'consumersecret' => $secret,
					'consumerkey' => $key,
                                        'applicationname' => $applicationname
				);
		}
	}
	
	$sites = set_config('statusnet','sites', $sites);
	
}

function statusnet_plugin_admin(&$a, &$o){

	$sites = get_config('statusnet','sites');
	$sitesform=array();
	if (is_array($sites)){
		foreach($sites as $id=>$s){
			$sitesform[] = Array(
				'sitename' => Array("sitename[$id]", "Site name", $s['sitename'], ""),
				'apiurl' => Array("apiurl[$id]", "Api url", $s['apiurl'], ""),
				'secret' => Array("secret[$id]", "Secret", $s['consumersecret'], ""),
				'key' => Array("key[$id]", "Key", $s['consumerkey'], ""),
				'applicationname' => Array("applicationname[$id]", "Application name", $s['applicationname'], ""),
				'delete' => Array("delete[$id]", "Delete", False , "Check to delete this preset"),
			);
		}
	}
	/* empty form to add new site */
	$id++;
	$sitesform[] = Array(
		'sitename' => Array("sitename[$id]", t("Site name"), "", ""),
		'apiurl' => Array("apiurl[$id]", t("API URL"), "", ""),
		'secret' => Array("secret[$id]", t("Consumer Secret"), "", ""),
		'key' => Array("key[$id]", t("Consumer Key"), "", ""),
		'applicationname' => Array("applicationname[$id]", t("Application name"), "", ""),
	);

	$t = get_markup_template( "admin.tpl", "addon/statusnet/" );
	$o = replace_macros($t, array(
		'$submit' => t('Submit'),
		'$sites' => $sitesform,
	));
}

function statusnet_cron($a,$b) {
	$last = get_config('statusnet','last_poll');

	$poll_interval = intval(get_config('statusnet','poll_interval'));
	if(! $poll_interval)
		$poll_interval = STATUSNET_DEFAULT_POLL_INTERVAL;

	if($last) {
		$next = $last + ($poll_interval * 60);
		if($next > time()) {
			logger('statusnet: poll intervall not reached');
			return;
		}
	}
	logger('statusnet: cron_start');

	$r = q("SELECT * FROM `pconfig` WHERE `cat` = 'statusnet' AND `k` = 'mirror_posts' AND `v` = '1' ORDER BY RAND() ");
	if(count($r)) {
		foreach($r as $rr) {
			logger('statusnet: fetching for user '.$rr['uid']);
			statusnet_fetchtimeline($a, $rr['uid']);
		}
	}

	logger('statusnet: cron_end');

	set_config('statusnet','last_poll', time());
}

function statusnet_fetchtimeline($a, $uid) {
	$ckey    = get_pconfig($uid, 'statusnet', 'consumerkey');
	$csecret = get_pconfig($uid, 'statusnet', 'consumersecret');
	$api     = get_pconfig($uid, 'statusnet', 'baseapi');
	$otoken  = get_pconfig($uid, 'statusnet', 'oauthtoken');
	$osecret = get_pconfig($uid, 'statusnet', 'oauthsecret');
	$lastid  = get_pconfig($uid, 'statusnet', 'lastid');

        //  get the application name for the SN app
        //  1st try personal config, then system config and fallback to the 
        //  hostname of the node if neither one is set. 
        $application_name  = get_pconfig( $uid, 'statusnet', 'application_name');
        if ($application_name == "")
	        $application_name  = get_config('statusnet', 'application_name');
	if ($application_name == "")
		$application_name = $a->get_hostname();

	$connection = new StatusNetOAuth($api, $ckey,$csecret,$otoken,$osecret);

	$parameters = array("exclude_replies" => true, "trim_user" => true, "contributor_details" => false, "include_rts" => false);

	$first_time = ($lastid == "");

	if ($lastid <> "")
		$parameters["since_id"] = $lastid;

	$items = $connection->get('statuses/user_timeline', $parameters);

	if (!is_array($items))
		return;

	$posts = array_reverse($items);

        if (count($posts)) {
            foreach ($posts as $post) {
		if ($post->id > $lastid)
			$lastid = $post->id;

		if ($first_time)
			continue;

		if (is_object($post->retweeted_status))
			continue;

		if ($post->in_reply_to_status_id != "")
			continue;

		if (!strpos($post->source, $application_name)) {
			$_SESSION["authenticated"] = true;
			$_SESSION["uid"] = $uid;

			$_REQUEST["type"] = "wall";
			$_REQUEST["api_source"] = true;
			$_REQUEST["profile_uid"] = $uid;
			$_REQUEST["source"] = "StatusNet";

			//$_REQUEST["date"] = $post->created_at;

			$_REQUEST["body"] = $post->text;
			if (is_string($post->place->name))
				$_REQUEST["location"] = $post->place->name;

			if (is_string($post->place->full_name))
				$_REQUEST["location"] = $post->place->full_name;

			if (is_array($post->geo->coordinates))
				$_REQUEST["coord"] = $post->geo->coordinates[0]." ".$post->geo->coordinates[1];

			if (is_array($post->coordinates->coordinates))
				$_REQUEST["coord"] = $post->coordinates->coordinates[1]." ".$post->coordinates->coordinates[0];

			//print_r($_REQUEST);
			if ($_REQUEST["body"] != "") {
				logger('statusnet: posting for user '.$uid);

				require_once('mod/item.php');
				item_post($a);
			}
                }
            }
	}
	set_pconfig($uid, 'statusnet', 'lastid', $lastid);
}