friendica/include/api.php

<?php
/**
 * @file include/api.php
 * Friendica implementation of statusnet/twitter API
 *
 * @todo Automatically detect if incoming data is HTML or BBCode
 */
	require_once('include/HTTPExceptions.php');

	require_once('include/bbcode.php');
	require_once('include/datetime.php');
	require_once('include/conversation.php');
	require_once('include/oauth.php');
	require_once('include/html2plain.php');
	require_once('mod/share.php');
	require_once('include/Photo.php');
	require_once('mod/item.php');
	require_once('include/security.php');
	require_once('include/contact_selectors.php');
	require_once('include/html2bbcode.php');
	require_once('mod/wall_upload.php');
	require_once('mod/proxy.php');
	require_once('include/message.php');
	require_once('include/group.php');
	require_once('include/like.php');
	require_once('include/NotificationsManager.php');
	require_once('include/plaintext.php');
	require_once('include/xml.php');


	define('API_METHOD_ANY','*');
	define('API_METHOD_GET','GET');
	define('API_METHOD_POST','POST,PUT');
	define('API_METHOD_DELETE','POST,DELETE');



	$API = Array();
	$called_api = Null;

	/**
	 * @brief Auth API user
	 *
	 * It is not sufficient to use local_user() to check whether someone is allowed to use the API,
	 * because this will open CSRF holes (just embed an image with src=friendicasite.com/api/statuses/update?status=CSRF
	 * into a page, and visitors will post something without noticing it).
	 */
	function api_user() {
		if ($_SESSION['allow_api'])
			return local_user();

		return false;
	}

	/**
	 * @brief Get source name from API client
	 *
	 * Clients can send 'source' parameter to be show in post metadata
	 * as "sent via <source>".
	 * Some clients doesn't send a source param, we support ones we know
	 * (only Twidere, atm)
	 *
	 * @return string
	 * 		Client source name, default to "api" if unset/unknown
	 */
	function api_source() {
		if (requestdata('source'))
			return (requestdata('source'));

		// Support for known clients that doesn't send a source name
		if (strstr($_SERVER['HTTP_USER_AGENT'], "Twidere"))
			return ("Twidere");

		logger("Unrecognized user-agent ".$_SERVER['HTTP_USER_AGENT'], LOGGER_DEBUG);

		return ("api");
	}

	/**
	 * @brief Format date for API
	 *
	 * @param string $str Source date, as UTC
	 * @return string Date in UTC formatted as "D M d H:i:s +0000 Y"
	 */
	function api_date($str){
		//Wed May 23 06:01:13 +0000 2007
		return datetime_convert('UTC', 'UTC', $str, "D M d H:i:s +0000 Y" );
	}

	/**
	 * @brief Register API endpoint
	 *
	 * Register a function to be the endpont for defined API path.
	 *
	 * @param string $path API URL path, relative to App::get_baseurl()
	 * @param string $func Function name to call on path request
	 * @param bool $auth API need logged user
	 * @param string $method
	 * 	HTTP method reqiured to call this endpoint.
	 * 	One of API_METHOD_ANY, API_METHOD_GET, API_METHOD_POST.
	 *  Default to API_METHOD_ANY
	 */
	function api_register_func($path, $func, $auth=false, $method=API_METHOD_ANY){
		global $API;
		$API[$path] = array(
			'func'=>$func,
			'auth'=>$auth,
			'method'=> $method
		);

		// Workaround for hotot
		$path = str_replace("api/", "api/1.1/", $path);
		$API[$path] = array(
			'func'=>$func,
			'auth'=>$auth,
			'method'=> $method
		);
	}

	/**
	 * @brief Login API user
	 *
	 * Log in user via OAuth1 or Simple HTTP Auth.
	 * Simple Auth allow username in form of <pre>user@server</pre>, ignoring server part
	 *
	 * @param App $a
	 * @hook 'authenticate'
	 * 		array $addon_auth
	 *			'username' => username from login form
	 *			'password' => password from login form
	 *			'authenticated' => return status,
	 *			'user_record' => return authenticated user record
	 * @hook 'logged_in'
	 * 		array $user	logged user record
	 */
	function api_login(App &$a){
		// login with oauth
		try{
			$oauth = new FKOAuth1();
			list($consumer,$token) = $oauth->verify_request(OAuthRequest::from_request());
			if (!is_null($token)){
				$oauth->loginUser($token->uid);
				call_hooks('logged_in', $a->user);
				return;
			}
			echo __file__.__line__.__function__."<pre>"; var_dump($consumer, $token); die();
		}catch(Exception $e){
			logger($e);
		}



		// workaround for HTTP-auth in CGI mode
		if(x($_SERVER,'REDIRECT_REMOTE_USER')) {
			$userpass = base64_decode(substr($_SERVER["REDIRECT_REMOTE_USER"],6)) ;
			if(strlen($userpass)) {
				list($name, $password) = explode(':', $userpass);
				$_SERVER['PHP_AUTH_USER'] = $name;
				$_SERVER['PHP_AUTH_PW'] = $password;
			}
		}

		if (!isset($_SERVER['PHP_AUTH_USER'])) {
			logger('API_login: ' . print_r($_SERVER,true), LOGGER_DEBUG);
			header('WWW-Authenticate: Basic realm="Friendica"');
			throw new UnauthorizedException("This API requires login");
		}

		$user = $_SERVER['PHP_AUTH_USER'];
		$password = $_SERVER['PHP_AUTH_PW'];
		$encrypted = hash('whirlpool',trim($password));

		// allow "user@server" login (but ignore 'server' part)
		$at=strstr($user, "@", true);
		if ( $at ) $user=$at;

		/**
		 *  next code from mod/auth.php. needs better solution
		 */
		$record = null;

		$addon_auth = array(
			'username' => trim($user),
			'password' => trim($password),
			'authenticated' => 0,
			'user_record' => null
		);

		/**
		 *
		 * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
		 * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
		 * and later plugins should not interfere with an earlier one that succeeded.
		 *
		 */

		call_hooks('authenticate', $addon_auth);

		if(($addon_auth['authenticated']) && (count($addon_auth['user_record']))) {
			$record = $addon_auth['user_record'];
		}
		else {
			// process normal login request

			$r = q("SELECT * FROM `user` WHERE (`email` = '%s' OR `nickname` = '%s')
				AND `password` = '%s' AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
				dbesc(trim($user)),
				dbesc(trim($user)),
				dbesc($encrypted)
			);
			if (dbm::is_result($r))
				$record = $r[0];
		}

		if((! $record) || (! count($record))) {
			logger('API_login failure: ' . print_r($_SERVER,true), LOGGER_DEBUG);
			header('WWW-Authenticate: Basic realm="Friendica"');
			#header('HTTP/1.0 401 Unauthorized');
			#die('This api requires login');
			throw new UnauthorizedException("This API requires login");
		}

		authenticate_success($record);

		$_SESSION["allow_api"] = true;

		call_hooks('logged_in', $a->user);

	}

	/**
	 * @brief Check HTTP method of called API
	 *
	 * API endpoints can define which HTTP method to accept when called.
	 * This function check the current HTTP method agains endpoint
	 * registered method.
	 *
	 * @param string $method Required methods, uppercase, separated by comma
	 * @return bool
	 */
	 function api_check_method($method) {
		if ($method=="*") return True;
		return strpos($method, $_SERVER['REQUEST_METHOD']) !== false;
	 }

	/**
	 * @brief Main API entry point
	 *
	 * Authenticate user, call registered API function, set HTTP headers
	 *
	 * @param App $a
	 * @return string API call result
	 */
	function api_call(App &$a){
		global $API, $called_api;

		$type="json";
		if (strpos($a->query_string, ".xml")>0) $type="xml";
		if (strpos($a->query_string, ".json")>0) $type="json";
		if (strpos($a->query_string, ".rss")>0) $type="rss";
		if (strpos($a->query_string, ".atom")>0) $type="atom";
		try {
			foreach ($API as $p=>$info){
				if (strpos($a->query_string, $p)===0){
					if (!api_check_method($info['method'])){
						throw new MethodNotAllowedException();
					}

					$called_api= explode("/",$p);
					//unset($_SERVER['PHP_AUTH_USER']);
					if ($info['auth']===true && api_user()===false) {
							api_login($a);
					}

					logger('API call for ' . $a->user['username'] . ': ' . $a->query_string);
					logger('API parameters: ' . print_r($_REQUEST,true));

					$stamp =  microtime(true);
					$r = call_user_func($info['func'], $type);
					$duration = (float)(microtime(true)-$stamp);
					logger("API call duration: ".round($duration, 2)."\t".$a->query_string, LOGGER_DEBUG);

					if (get_config("system", "profiler")) {
						$duration = microtime(true)-$a->performance["start"];

						logger(parse_url($a->query_string, PHP_URL_PATH).": ".sprintf("Database: %s/%s, Network: %s, I/O: %s, Other: %s, Total: %s",
							round($a->performance["database"] - $a->performance["database_write"], 3),
							round($a->performance["database_write"], 3),
							round($a->performance["network"], 2),
							round($a->performance["file"], 2),
							round($duration - ($a->performance["database"] + $a->performance["network"]
								+ $a->performance["file"]), 2),
							round($duration, 2)),
							LOGGER_DEBUG);

						if (get_config("rendertime", "callstack")) {
							$o = "Database Read:\n";
							foreach ($a->callstack["database"] AS $func => $time) {
								$time = round($time, 3);
								if ($time > 0)
									$o .= $func.": ".$time."\n";
							}
							$o .= "\nDatabase Write:\n";
							foreach ($a->callstack["database_write"] AS $func => $time) {
								$time = round($time, 3);
								if ($time > 0)
									$o .= $func.": ".$time."\n";
							}

							$o .= "\nNetwork:\n";
							foreach ($a->callstack["network"] AS $func => $time) {
								$time = round($time, 3);
								if ($time > 0)
									$o .= $func.": ".$time."\n";
							}
							logger($o, LOGGER_DEBUG);
						}
					}


					if ($r===false) {
						// api function returned false withour throw an
						// exception. This should not happend, throw a 500
						throw new InternalServerErrorException();
					}

					switch($type){
						case "xml":
							header ("Content-Type: text/xml");
							return $r;
							break;
						case "json":
							header ("Content-Type: application/json");
							foreach($r as $rr)
								$json = json_encode($rr);
								if ($_GET['callback'])
									$json = $_GET['callback']."(".$json.")";
								return $json;
							break;
						case "rss":
							header ("Content-Type: application/rss+xml");
							return '<?xml version="1.0" encoding="UTF-8"?>'."\n".$r;
							break;
						case "atom":
							header ("Content-Type: application/atom+xml");
							return '<?xml version="1.0" encoding="UTF-8"?>'."\n".$r;
							break;

					}
				}
			}
			throw new NotImplementedException();
		} catch (HTTPException $e) {
			header("HTTP/1.1 {$e->httpcode} {$e->httpdesc}");
			return api_error($type, $e);
		}
	}

	/**
	 * @brief Format API error string
	 *
	 * @param string $type Return type (xml, json, rss, as)
	 * @param HTTPException $error Error object
	 * @return strin error message formatted as $type
	 */
	function api_error($type, $e) {

		$a = get_app();

		$error = ($e->getMessage()!==""?$e->getMessage():$e->httpdesc);
		# TODO:  https://dev.twitter.com/overview/api/response-codes

		$error = array("error" => $error,
				"code" => $e->httpcode." ".$e->httpdesc,
				"request" => $a->query_string);

		$ret = api_format_data('status', $type, array('status' => $error));

		switch($type){
			case "xml":
				header ("Content-Type: text/xml");
				return $ret;
				break;
			case "json":
				header ("Content-Type: application/json");
				return json_encode($ret);
				break;
			case "rss":
				header ("Content-Type: application/rss+xml");
				return $ret;
				break;
			case "atom":
				header ("Content-Type: application/atom+xml");
				return $ret;
				break;
		}
	}

	/**
	 * @brief Set values for RSS template
	 *
	 * @param App $a
	 * @param array $arr Array to be passed to template
	 * @param array $user_info
	 * @return array
	 */
	function api_rss_extra(&$a, $arr, $user_info){
		if (is_null($user_info)) $user_info = api_get_user($a);
		$arr['$user'] = $user_info;
		$arr['$rss'] = array(
			'alternate'    => $user_info['url'],
			'self'         => App::get_baseurl(). "/". $a->query_string,
			'base'         => App::get_baseurl(),
			'updated'      => api_date(null),
			'atom_updated' => datetime_convert('UTC','UTC','now',ATOM_TIME),
			'language'     => $user_info['language'],
			'logo'         => App::get_baseurl()."/images/friendica-32.png",
		);

		return $arr;
	}


	/**
	 * @brief Unique contact to contact url.
	 *
	 * @param int $id Contact id
	 * @return bool|string
	 * 		Contact url or False if contact id is unknown
	 */
	function api_unique_id_to_url($id){
		$r = q("SELECT `url` FROM `contact` WHERE `uid` = 0 AND `id` = %d LIMIT 1",
			intval($id));
		if ($r)
			return ($r[0]["url"]);
		else
			return false;
	}

	/**
	 * @brief Get user info array.
	 *
	 * @param Api $a
	 * @param int|string $contact_id Contact ID or URL
	 * @param string $type Return type (for errors)
	 */
	function api_get_user(&$a, $contact_id = Null, $type = "json"){
		global $called_api;
		$user = null;
		$extra_query = "";
		$url = "";
		$nick = "";

		logger("api_get_user: Fetching user data for user ".$contact_id, LOGGER_DEBUG);

		// Searching for contact URL
		if(!is_null($contact_id) AND (intval($contact_id) == 0)){
			$user = dbesc(normalise_link($contact_id));
			$url = $user;
			$extra_query = "AND `contact`.`nurl` = '%s' ";
			if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
		}

		// Searching for contact id with uid = 0
		if(!is_null($contact_id) AND (intval($contact_id) != 0)){
			$user = dbesc(api_unique_id_to_url($contact_id));

			if ($user == "")
				throw new BadRequestException("User not found.");

			$url = $user;
			$extra_query = "AND `contact`.`nurl` = '%s' ";
			if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
		}

		if(is_null($user) && x($_GET, 'user_id')) {
			$user = dbesc(api_unique_id_to_url($_GET['user_id']));

			if ($user == "")
				throw new BadRequestException("User not found.");

			$url = $user;
			$extra_query = "AND `contact`.`nurl` = '%s' ";
			if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
		}
		if(is_null($user) && x($_GET, 'screen_name')) {
			$user = dbesc($_GET['screen_name']);
			$nick = $user;
			$extra_query = "AND `contact`.`nick` = '%s' ";
			if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
		}

		if (is_null($user) AND ($a->argc > (count($called_api)-1)) AND (count($called_api) > 0)){
			$argid = count($called_api);
			list($user, $null) = explode(".",$a->argv[$argid]);
			if(is_numeric($user)){
				$user = dbesc(api_unique_id_to_url($user));

				if ($user == "")
					return false;

				$url = $user;
				$extra_query = "AND `contact`.`nurl` = '%s' ";
				if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
			} else {
				$user = dbesc($user);
				$nick = $user;
				$extra_query = "AND `contact`.`nick` = '%s' ";
				if (api_user()!==false)  $extra_query .= "AND `contact`.`uid`=".intval(api_user());
			}
		}

		logger("api_get_user: user ".$user, LOGGER_DEBUG);

		if (!$user) {
			if (api_user()===false) {
				api_login($a);
				return False;
			} else {
				$user = $_SESSION['uid'];
				$extra_query = "AND `contact`.`uid` = %d AND `contact`.`self` ";
			}

		}

		logger('api_user: ' . $extra_query . ', user: ' . $user);
		// user info
		$uinfo = q("SELECT *, `contact`.`id` as `cid` FROM `contact`
				WHERE 1
				$extra_query",
				$user
		);

		// Selecting the id by priority, friendica first
		api_best_nickname($uinfo);

		// if the contact wasn't found, fetch it from the contacts with uid = 0
		if (count($uinfo)==0) {
			$r = array();

			if ($url != "")
				$r = q("SELECT * FROM `contact` WHERE `uid` = 0 AND `nurl` = '%s' LIMIT 1", dbesc(normalise_link($url)));

			if ($r) {
				$network_name = network_to_name($r[0]['network'], $r[0]['url']);

				// If no nick where given, extract it from the address
				if (($r[0]['nick'] == "") OR ($r[0]['name'] == $r[0]['nick']))
					$r[0]['nick'] = api_get_nick($r[0]["url"]);

				$ret = array(
					'id' => $r[0]["id"],
					'id_str' => (string) $r[0]["id"],
					'name' => $r[0]["name"],
					'screen_name' => (($r[0]['nick']) ? $r[0]['nick'] : $r[0]['name']),
					'location' => ($r[0]["location"] != "") ? $r[0]["location"] : $network_name,
					'description' => $r[0]["about"],
					'profile_image_url' => $r[0]["micro"],
					'profile_image_url_https' => $r[0]["micro"],
					'url' => $r[0]["url"],
					'protected' => false,
					'followers_count' => 0,
					'friends_count' => 0,
					'listed_count' => 0,
					'created_at' => api_date($r[0]["created"]),
					'favourites_count' => 0,
					'utc_offset' => 0,
					'time_zone' => 'UTC',
					'geo_enabled' => false,
					'verified' => false,
					'statuses_count' => 0,
					'lang' => '',
					'contributors_enabled' => false,
					'is_translator' => false,
					'is_translation_enabled' => false,
					'following' => false,
					'follow_request_sent' => false,
					'statusnet_blocking' => false,
					'notifications' => false,
					'statusnet_profile_url' => $r[0]["url"],
					'uid' => 0,
					'cid' => get_contact($r[0]["url"], api_user(), true),
					'self' => 0,
					'network' => $r[0]["network"],
				);

				return $ret;
			} else {
				throw new BadRequestException("User not found.");
			}
		}

		if($uinfo[0]['self']) {

			if ($uinfo[0]['network'] == "")
				$uinfo[0]['network'] = NETWORK_DFRN;

			$usr = q("select * from user where uid = %d limit 1",
				intval(api_user())
			);
			$profile = q("select * from profile where uid = %d and `is-default` = 1 limit 1",
				intval(api_user())
			);

			// Counting is deactivated by now, due to performance issues
			// count public wall messages
			//$r = q("SELECT COUNT(*) as `count` FROM `item` WHERE `uid` = %d AND `wall`",
			//		intval($uinfo[0]['uid'])
			//);
			//$countitms = $r[0]['count'];
			$countitms = 0;
		} else {
			// Counting is deactivated by now, due to performance issues
			//$r = q("SELECT count(*) as `count` FROM `item`
			//		WHERE  `contact-id` = %d",
			//		intval($uinfo[0]['id'])
			//);
			//$countitms = $r[0]['count'];
			$countitms = 0;
		}
/*
		// Counting is deactivated by now, due to performance issues
		// count friends
		$r = q("SELECT count(*) as `count` FROM `contact`
				WHERE  `uid` = %d AND `rel` IN ( %d, %d )
				AND `self`=0 AND NOT `blocked` AND `hidden`=0",
				intval($uinfo[0]['uid']),
				intval(CONTACT_IS_SHARING),
				intval(CONTACT_IS_FRIEND)
		);
		$countfriends = $r[0]['count'];

		$r = q("SELECT count(*) as `count` FROM `contact`
				WHERE  `uid` = %d AND `rel` IN ( %d, %d )
				AND `self`=0 AND NOT `blocked` AND `hidden`=0",
				intval($uinfo[0]['uid']),
				intval(CONTACT_IS_FOLLOWER),
				intval(CONTACT_IS_FRIEND)
		);
		$countfollowers = $r[0]['count'];

		$r = q("SELECT count(*) as `count` FROM item where starred = 1 and uid = %d and deleted = 0",
			intval($uinfo[0]['uid'])
		);
		$starred = $r[0]['count'];


		if(! $uinfo[0]['self']) {
			$countfriends = 0;
			$countfollowers = 0;
			$starred = 0;
		}
*/
		$countfriends = 0;
		$countfollowers = 0;
		$starred = 0;

		// Add a nick if it isn't present there
		if (($uinfo[0]['nick'] == "") OR ($uinfo[0]['name'] == $uinfo[0]['nick'])) {
			$uinfo[0]['nick'] = api_get_nick($uinfo[0]["url"]);
		}

		$network_name = network_to_name($uinfo[0]['network'], $uinfo[0]['url']);

		$pcontact_id  = get_contact($uinfo[0]['url'], 0, true);

		$ret = Array(
			'id' => intval($pcontact_id),
			'id_str' => (string) intval($pcontact_id),
			'name' => (($uinfo[0]['name']) ? $uinfo[0]['name'] : $uinfo[0]['nick']),
			'screen_name' => (($uinfo[0]['nick']) ? $uinfo[0]['nick'] : $uinfo[0]['name']),
			'location' => ($usr) ? $usr[0]['default-location'] : $network_name,
			'description' => (($profile) ? $profile[0]['pdesc'] : NULL),
			'profile_image_url' => $uinfo[0]['micro'],
			'profile_image_url_https' => $uinfo[0]['micro'],
			'url' => $uinfo[0]['url'],
			'protected' => false,
			'followers_count' => intval($countfollowers),
			'friends_count' => intval($countfriends),
			'listed_count' => 0,
			'created_at' => api_date($uinfo[0]['created']),
			'favourites_count' => intval($starred),
			'utc_offset' => "0",
			'time_zone' => 'UTC',
			'geo_enabled' => false,
			'verified' => true,
			'statuses_count' => intval($countitms),
			'lang' => '',
			'contributors_enabled' => false,
			'is_translator' => false,
			'is_translation_enabled' => false,
			'following' => (($uinfo[0]['rel'] == CONTACT_IS_FOLLOWER) OR ($uinfo[0]['rel'] == CONTACT_IS_FRIEND)),
			'follow_request_sent' => false,
			'statusnet_blocking' => false,
			'notifications' => false,
			//'statusnet_profile_url' => App::get_baseurl()."/contacts/".$uinfo[0]['cid'],
			'statusnet_profile_url' => $uinfo[0]['url'],
			'uid' => intval($uinfo[0]['uid']),
			'cid' => intval($uinfo[0]['cid']),
			'self' => $uinfo[0]['self'],
			'network' => $uinfo[0]['network'],
		);

		return $ret;

	}

	/**
	 * @brief return api-formatted array for item's author and owner
	 *
	 * @param App $a
	 * @param array $item : item from db
	 * @return array(array:author, array:owner)
	 */
	function api_item_get_user(&$a, $item) {

		$status_user = api_get_user($a, $item["author-link"]);

		$status_user["protected"] = (($item["allow_cid"] != "") OR
						($item["allow_gid"] != "") OR
						($item["deny_cid"] != "") OR
						($item["deny_gid"] != "") OR
						$item["private"]);

		$owner_user = api_get_user($a, $item["owner-link"]);

		return (array($status_user, $owner_user));
	}

	/**
	 * @brief walks recursively through an array with the possibility to change value and key
	 *
	 * @param array $array The array to walk through
	 * @param string $callback The callback function
	 *
	 * @return array the transformed array
	 */
	function api_walk_recursive(array &$array, callable $callback) {

		$new_array = array();

		foreach ($array as $k => $v) {
			if (is_array($v)) {
				if ($callback($v, $k))
					$new_array[$k] = api_walk_recursive($v, $callback);
			} else {
				if ($callback($v, $k))
					$new_array[$k] = $v;
			}
		}
		$array = $new_array;

		return $array;
	}

	/**
	 * @brief Callback function to transform the array in an array that can be transformed in a XML file
	 *
	 * @param variant $item Array item value
	 * @param string $key Array key
	 *
	 * @return boolean Should the array item be deleted?
	 */
	function api_reformat_xml(&$item, &$key) {
		if (is_bool($item))
			$item = ($item ? "true" : "false");

		if (substr($key, 0, 10) == "statusnet_")
			$key = "statusnet:".substr($key, 10);
		elseif (substr($key, 0, 10) == "friendica_")
			$key = "friendica:".substr($key, 10);
		//else
		//	$key = "default:".$key;

		return true;
	}

	/**
	 * @brief Creates the XML from a JSON style array
	 *
	 * @param array $data JSON style array
	 * @param string $root_element Name of the root element
	 *
	 * @return string The XML data
	 */
	function api_create_xml($data, $root_element) {
		$childname = key($data);
		$data2 = array_pop($data);
		$key = key($data2);

		$namespaces = array("" => "http://api.twitter.com",
					"statusnet" => "http://status.net/schema/api/1/",
					"friendica" => "http://friendi.ca/schema/api/1/",
					"georss" => "http://www.georss.org/georss");

		/// @todo Auto detection of needed namespaces
		if (in_array($root_element, array("ok", "hash", "config", "version", "ids", "notes", "photos")))
			$namespaces = array();

		if (is_array($data2))
			api_walk_recursive($data2, "api_reformat_xml");

		if ($key == "0") {
			$data4 = array();
			$i = 1;

			foreach ($data2 AS $item)
				$data4[$i++.":".$childname] = $item;

			$data2 = $data4;
		}

		$data3 = array($root_element => $data2);

		$ret = xml::from_array($data3, $xml, false, $namespaces);
		return $ret;
	}

	/**
	 * @brief Formats the data according to the data type
	 *
	 * @param string $root_element Name of the root element
	 * @param string $type Return type (atom, rss, xml, json)
	 * @param array $data JSON style array
	 *
	 * @return (string|object) XML data or JSON data
	 */
	function api_format_data($root_element, $type, $data){

		$a = get_app();

		switch($type){
			case "atom":
			case "rss":
			case "xml":
				$ret = api_create_xml($data, $root_element);
				break;
			case "json":
				$ret = $data;
				break;
		}

		return $ret;
	}

	/**
	 ** TWITTER API
	 */

	/**
	 * Returns an HTTP 200 OK response code and a representation of the requesting user if authentication was successful;
	 * returns a 401 status code and an error message if not.
	 * http://developer.twitter.com/doc/get/account/verify_credentials
	 */
	function api_account_verify_credentials($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		unset($_REQUEST["user_id"]);
		unset($_GET["user_id"]);

		unset($_REQUEST["screen_name"]);
		unset($_GET["screen_name"]);

		$skip_status = (x($_REQUEST,'skip_status')?$_REQUEST['skip_status']:false);

		$user_info = api_get_user($a);

		// "verified" isn't used here in the standard
		unset($user_info["verified"]);

		// - Adding last status
		if (!$skip_status) {
			$user_info["status"] = api_status_show("raw");
			if (!count($user_info["status"]))
				unset($user_info["status"]);
			else
				unset($user_info["status"]["user"]);
		}

		// "uid" and "self" are only needed for some internal stuff, so remove it from here
		unset($user_info["uid"]);
		unset($user_info["self"]);

		return api_format_data("user", $type, array('user' => $user_info));

	}
	api_register_func('api/account/verify_credentials','api_account_verify_credentials', true);


	/**
	 * get data from $_POST or $_GET
	 */
	function requestdata($k){
		if (isset($_POST[$k])){
			return $_POST[$k];
		}
		if (isset($_GET[$k])){
			return $_GET[$k];
		}
		return null;
	}

/*Waitman Gobble Mod*/
	function api_statuses_mediap($type) {

		$a = get_app();

		if (api_user()===false) {
			logger('api_statuses_update: no user');
			throw new ForbiddenException();
		}
		$user_info = api_get_user($a);

		$_REQUEST['type'] = 'wall';
		$_REQUEST['profile_uid'] = api_user();
		$_REQUEST['api_source'] = true;
		$txt = requestdata('status');
		//$txt = urldecode(requestdata('status'));

		if((strpos($txt,'<') !== false) || (strpos($txt,'>') !== false)) {

			$txt = html2bb_video($txt);
			$config = HTMLPurifier_Config::createDefault();
			$config->set('Cache.DefinitionImpl', null);
			$purifier = new HTMLPurifier($config);
			$txt = $purifier->purify($txt);
		}
		$txt = html2bbcode($txt);

		$a->argv[1]=$user_info['screen_name']; //should be set to username?

		$_REQUEST['hush']='yeah'; //tell wall_upload function to return img info instead of echo
		$bebop = wall_upload_post($a);

		//now that we have the img url in bbcode we can add it to the status and insert the wall item.
		$_REQUEST['body']=$txt."\n\n".$bebop;
		item_post($a);

		// this should output the last post (the one we just posted).
		return api_status_show($type);
	}
	api_register_func('api/statuses/mediap','api_statuses_mediap', true, API_METHOD_POST);
/*Waitman Gobble Mod*/


	function api_statuses_update($type) {

		$a = get_app();

		if (api_user()===false) {
			logger('api_statuses_update: no user');
			throw new ForbiddenException();
		}

		$user_info = api_get_user($a);

		// convert $_POST array items to the form we use for web posts.

		// logger('api_post: ' . print_r($_POST,true));

		if(requestdata('htmlstatus')) {
			$txt = requestdata('htmlstatus');
			if((strpos($txt,'<') !== false) || (strpos($txt,'>') !== false)) {
				$txt = html2bb_video($txt);

				$config = HTMLPurifier_Config::createDefault();
				$config->set('Cache.DefinitionImpl', null);

				$purifier = new HTMLPurifier($config);
				$txt = $purifier->purify($txt);

				$_REQUEST['body'] = html2bbcode($txt);
			}

		} else
			$_REQUEST['body'] = requestdata('status');

		$_REQUEST['title'] = requestdata('title');

		$parent = requestdata('in_reply_to_status_id');

		// Twidere sends "-1" if it is no reply ...
		if ($parent == -1)
			$parent = "";

		if(ctype_digit($parent))
			$_REQUEST['parent'] = $parent;
		else
			$_REQUEST['parent_uri'] = $parent;

		if(requestdata('lat') && requestdata('long'))
			$_REQUEST['coord'] = sprintf("%s %s",requestdata('lat'),requestdata('long'));
		$_REQUEST['profile_uid'] = api_user();

		if($parent)
			$_REQUEST['type'] = 'net-comment';
		else {
			// Check for throttling (maximum posts per day, week and month)
			$throttle_day = get_config('system','throttle_limit_day');
			if ($throttle_day > 0) {
				$datefrom = date("Y-m-d H:i:s", time() - 24*60*60);

				$r = q("SELECT COUNT(*) AS `posts_day` FROM `item` WHERE `uid`=%d AND `wall`
					AND `created` > '%s' AND `id` = `parent`",
					intval(api_user()), dbesc($datefrom));

				if ($r)
					$posts_day = $r[0]["posts_day"];
				else
					$posts_day = 0;

				if ($posts_day > $throttle_day) {
					logger('Daily posting limit reached for user '.api_user(), LOGGER_DEBUG);
					#die(api_error($type, sprintf(t("Daily posting limit of %d posts reached. The post was rejected."), $throttle_day)));
					throw new TooManyRequestsException(sprintf(t("Daily posting limit of %d posts reached. The post was rejected."), $throttle_day));
				}
			}

			$throttle_week = get_config('system','throttle_limit_week');
			if ($throttle_week > 0) {
				$datefrom = date("Y-m-d H:i:s", time() - 24*60*60*7);

				$r = q("SELECT COUNT(*) AS `posts_week` FROM `item` WHERE `uid`=%d AND `wall`
					AND `created` > '%s' AND `id` = `parent`",
					intval(api_user()), dbesc($datefrom));

				if ($r)
					$posts_week = $r[0]["posts_week"];
				else
					$posts_week = 0;

				if ($posts_week > $throttle_week) {
					logger('Weekly posting limit reached for user '.api_user(), LOGGER_DEBUG);
					#die(api_error($type, sprintf(t("Weekly posting limit of %d posts reached. The post was rejected."), $throttle_week)));
					throw new TooManyRequestsException(sprintf(t("Weekly posting limit of %d posts reached. The post was rejected."), $throttle_week));

				}
			}

			$throttle_month = get_config('system','throttle_limit_month');
			if ($throttle_month > 0) {
				$datefrom = date("Y-m-d H:i:s", time() - 24*60*60*30);

				$r = q("SELECT COUNT(*) AS `posts_month` FROM `item` WHERE `uid`=%d AND `wall`
					AND `created` > '%s' AND `id` = `parent`",
					intval(api_user()), dbesc($datefrom));

				if ($r)
					$posts_month = $r[0]["posts_month"];
				else
					$posts_month = 0;

				if ($posts_month > $throttle_month) {
					logger('Monthly posting limit reached for user '.api_user(), LOGGER_DEBUG);
					#die(api_error($type, sprintf(t("Monthly posting limit of %d posts reached. The post was rejected."), $throttle_month)));
					throw new TooManyRequestsException(sprintf(t("Monthly posting limit of %d posts reached. The post was rejected."), $throttle_month));
				}
			}

			$_REQUEST['type'] = 'wall';
		}

		if(x($_FILES,'media')) {
			// upload the image if we have one
			$_REQUEST['hush']='yeah'; //tell wall_upload function to return img info instead of echo
			$media = wall_upload_post($a);
			if(strlen($media)>0)
				$_REQUEST['body'] .= "\n\n".$media;
		}

		// To-Do: Multiple IDs
		if (requestdata('media_ids')) {
			$r = q("SELECT `resource-id`, `scale`, `nickname`, `type` FROM `photo` INNER JOIN `user` ON `user`.`uid` = `photo`.`uid` WHERE `resource-id` IN (SELECT `resource-id` FROM `photo` WHERE `id` = %d) AND `scale` > 0 AND `photo`.`uid` = %d ORDER BY `photo`.`width` DESC LIMIT 1",
				intval(requestdata('media_ids')), api_user());
			if ($r) {
				$phototypes = Photo::supportedTypes();
				$ext = $phototypes[$r[0]['type']];
				$_REQUEST['body'] .= "\n\n".'[url='.App::get_baseurl().'/photos/'.$r[0]['nickname'].'/image/'.$r[0]['resource-id'].']';
				$_REQUEST['body'] .= '[img]'.App::get_baseurl()."/photo/".$r[0]['resource-id']."-".$r[0]['scale'].".".$ext."[/img][/url]";
			}
		}

		// set this so that the item_post() function is quiet and doesn't redirect or emit json

		$_REQUEST['api_source'] = true;

		if (!x($_REQUEST, "source"))
			$_REQUEST["source"] = api_source();

		// call out normal post function

		item_post($a);

		// this should output the last post (the one we just posted).
		return api_status_show($type);
	}
	api_register_func('api/statuses/update','api_statuses_update', true, API_METHOD_POST);
	api_register_func('api/statuses/update_with_media','api_statuses_update', true, API_METHOD_POST);


	function api_media_upload($type) {

		$a = get_app();

		if (api_user()===false) {
			logger('no user');
			throw new ForbiddenException();
		}

		$user_info = api_get_user($a);

		if(!x($_FILES,'media')) {
			// Output error
			throw new BadRequestException("No media.");
		}

		$media = wall_upload_post($a, false);
		if(!$media) {
			// Output error
			throw new InternalServerErrorException();
		}

		$returndata = array();
		$returndata["media_id"] = $media["id"];
		$returndata["media_id_string"] = (string)$media["id"];
		$returndata["size"] = $media["size"];
		$returndata["image"] = array("w" => $media["width"],
						"h" => $media["height"],
						"image_type" => $media["type"]);

		logger("Media uploaded: ".print_r($returndata, true), LOGGER_DEBUG);

		return array("media" => $returndata);
	}
	api_register_func('api/media/upload','api_media_upload', true, API_METHOD_POST);

	function api_status_show($type){

		$a = get_app();

		$user_info = api_get_user($a);

		logger('api_status_show: user_info: '.print_r($user_info, true), LOGGER_DEBUG);

		if ($type == "raw")
			$privacy_sql = "AND `item`.`allow_cid`='' AND `item`.`allow_gid`='' AND `item`.`deny_cid`='' AND `item`.`deny_gid`=''";
		else
			$privacy_sql = "";

		// get last public wall message
		$lastwall = q("SELECT `item`.*
				FROM `item`
				WHERE `item`.`contact-id` = %d AND `item`.`uid` = %d
					AND ((`item`.`author-link` IN ('%s', '%s')) OR (`item`.`owner-link` IN ('%s', '%s')))
					AND `item`.`type` != 'activity' $privacy_sql
				ORDER BY `item`.`id` DESC
				LIMIT 1",
				intval($user_info['cid']),
				intval(api_user()),
				dbesc($user_info['url']),
				dbesc(normalise_link($user_info['url'])),
				dbesc($user_info['url']),
				dbesc(normalise_link($user_info['url']))
		);

		if (count($lastwall)>0){
			$lastwall = $lastwall[0];

			$in_reply_to = api_in_reply_to($lastwall);

			$converted = api_convert_item($lastwall);

			if ($type == "xml")
				$geo = "georss:point";
			else
				$geo = "geo";

			$status_info = array(
				'created_at' => api_date($lastwall['created']),
				'id' => intval($lastwall['id']),
				'id_str' => (string) $lastwall['id'],
				'text' => $converted["text"],
				'source' => (($lastwall['app']) ? $lastwall['app'] : 'web'),
				'truncated' => false,
				'in_reply_to_status_id' => $in_reply_to['status_id'],
				'in_reply_to_status_id_str' => $in_reply_to['status_id_str'],
				'in_reply_to_user_id' => $in_reply_to['user_id'],
				'in_reply_to_user_id_str' => $in_reply_to['user_id_str'],
				'in_reply_to_screen_name' => $in_reply_to['screen_name'],
				'user' => $user_info,
				$geo => NULL,
				'coordinates' => "",
				'place' => "",
				'contributors' => "",
				'is_quote_status' => false,
				'retweet_count' => 0,
				'favorite_count' => 0,
				'favorited' => $lastwall['starred'] ? true : false,
				'retweeted' => false,
				'possibly_sensitive' => false,
				'lang' => "",
				'statusnet_html'		=> $converted["html"],
				'statusnet_conversation_id'	=> $lastwall['parent'],
			);

			if (count($converted["attachments"]) > 0)
				$status_info["attachments"] = $converted["attachments"];

			if (count($converted["entities"]) > 0)
				$status_info["entities"] = $converted["entities"];

			if (($lastwall['item_network'] != "") AND ($status["source"] == 'web'))
				$status_info["source"] = network_to_name($lastwall['item_network'], $user_info['url']);
			elseif (($lastwall['item_network'] != "") AND (network_to_name($lastwall['item_network'], $user_info['url']) != $status_info["source"]))
				$status_info["source"] = trim($status_info["source"].' ('.network_to_name($lastwall['item_network'], $user_info['url']).')');

			// "uid" and "self" are only needed for some internal stuff, so remove it from here
			unset($status_info["user"]["uid"]);
			unset($status_info["user"]["self"]);
		}

		logger('status_info: '.print_r($status_info, true), LOGGER_DEBUG);

		if ($type == "raw")
			return($status_info);

		return  api_format_data("statuses", $type, array('status' => $status_info));

	}





	/**
	 * Returns extended information of a given user, specified by ID or screen name as per the required id parameter.
	 * The author's most recent status will be returned inline.
	 * http://developer.twitter.com/doc/get/users/show
	 */
	function api_users_show($type){

		$a = get_app();

		$user_info = api_get_user($a);
		$lastwall = q("SELECT `item`.*
				FROM `item`
				INNER JOIN `contact` ON `contact`.`id`=`item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				WHERE `item`.`uid` = %d AND `verb` = '%s' AND `item`.`contact-id` = %d
					AND ((`item`.`author-link` IN ('%s', '%s')) OR (`item`.`owner-link` IN ('%s', '%s')))
					AND `type`!='activity'
					AND `item`.`allow_cid`='' AND `item`.`allow_gid`='' AND `item`.`deny_cid`='' AND `item`.`deny_gid`=''
				ORDER BY `id` DESC
				LIMIT 1",
				intval(api_user()),
				dbesc(ACTIVITY_POST),
				intval($user_info['cid']),
				dbesc($user_info['url']),
				dbesc(normalise_link($user_info['url'])),
				dbesc($user_info['url']),
				dbesc(normalise_link($user_info['url']))
		);

		if (count($lastwall)>0){
			$lastwall = $lastwall[0];

			$in_reply_to = api_in_reply_to($lastwall);

			$converted = api_convert_item($lastwall);

			if ($type == "xml")
				$geo = "georss:point";
			else
				$geo = "geo";

			$user_info['status'] = array(
				'text' => $converted["text"],
				'truncated' => false,
				'created_at' => api_date($lastwall['created']),
				'in_reply_to_status_id' => $in_reply_to['status_id'],
				'in_reply_to_status_id_str' => $in_reply_to['status_id_str'],
				'source' => (($lastwall['app']) ? $lastwall['app'] : 'web'),
				'id' => intval($lastwall['contact-id']),
				'id_str' => (string) $lastwall['contact-id'],
				'in_reply_to_user_id' => $in_reply_to['user_id'],
				'in_reply_to_user_id_str' => $in_reply_to['user_id_str'],
				'in_reply_to_screen_name' => $in_reply_to['screen_name'],
				$geo => NULL,
				'favorited' => $lastwall['starred'] ? true : false,
				'statusnet_html'		=> $converted["html"],
				'statusnet_conversation_id'	=> $lastwall['parent'],
			);

			if (count($converted["attachments"]) > 0)
				$user_info["status"]["attachments"] = $converted["attachments"];

			if (count($converted["entities"]) > 0)
				$user_info["status"]["entities"] = $converted["entities"];

			if (($lastwall['item_network'] != "") AND ($user_info["status"]["source"] == 'web'))
				$user_info["status"]["source"] = network_to_name($lastwall['item_network'], $user_info['url']);
			if (($lastwall['item_network'] != "") AND (network_to_name($lastwall['item_network'], $user_info['url']) != $user_info["status"]["source"]))
				$user_info["status"]["source"] = trim($user_info["status"]["source"].' ('.network_to_name($lastwall['item_network'], $user_info['url']).')');

		}

		// "uid" and "self" are only needed for some internal stuff, so remove it from here
		unset($user_info["uid"]);
		unset($user_info["self"]);

		return  api_format_data("user", $type, array('user' => $user_info));

	}
	api_register_func('api/users/show','api_users_show');


	function api_users_search($type) {

		$a = get_app();

		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);

		$userlist = array();

		if (isset($_GET["q"])) {
			$r = q("SELECT id FROM `contact` WHERE `uid` = 0 AND `name` = '%s'", dbesc($_GET["q"]));
			if (!dbm::is_result($r))
				$r = q("SELECT `id` FROM `contact` WHERE `uid` = 0 AND `nick` = '%s'", dbesc($_GET["q"]));

			if (dbm::is_result($r)) {
				$k = 0;
				foreach ($r AS $user) {
					$user_info = api_get_user($a, $user["id"], "json");

					if ($type == "xml")
						$userlist[$k++.":user"] = $user_info;
					else
						$userlist[] = $user_info;
				}
				$userlist = array("users" => $userlist);
			} else {
				throw new BadRequestException("User not found.");
			}
		} else {
			throw new BadRequestException("User not found.");
		}
		return api_format_data("users", $type, $userlist);
	}

	api_register_func('api/users/search','api_users_search');

	/**
	 *
	 * http://developer.twitter.com/doc/get/statuses/home_timeline
	 *
	 * TODO: Optional parameters
	 * TODO: Add reply info
	 */
	function api_statuses_home_timeline($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		unset($_REQUEST["user_id"]);
		unset($_GET["user_id"]);

		unset($_REQUEST["screen_name"]);
		unset($_GET["screen_name"]);

		$user_info = api_get_user($a);
		// get last newtork messages

		// params
		$count = (x($_REQUEST,'count')?$_REQUEST['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;
		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);
		//$since_id = 0;//$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$exclude_replies = (x($_REQUEST,'exclude_replies')?1:0);
		$conversation_id = (x($_REQUEST,'conversation_id')?$_REQUEST['conversation_id']:0);

		$start = $page*$count;

		$sql_extra = '';
		if ($max_id > 0)
			$sql_extra .= ' AND `item`.`id` <= '.intval($max_id);
		if ($exclude_replies > 0)
			$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
		if ($conversation_id > 0)
			$sql_extra .= ' AND `item`.`parent` = '.intval($conversation_id);

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item`
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`uid` = %d AND `verb` = '%s'
			AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			$sql_extra
			AND `item`.`id`>%d
			ORDER BY `item`.`id` DESC LIMIT %d ,%d ",
			intval(api_user()),
			dbesc(ACTIVITY_POST),
			intval($since_id),
			intval($start),	intval($count)
		);

		$ret = api_format_items($r,$user_info, false, $type);

		// Set all posts from the query above to seen
		$idarray = array();
		foreach ($r AS $item)
			$idarray[] = intval($item["id"]);

		$idlist = implode(",", $idarray);

		if ($idlist != "") {
			$unseen = q("SELECT `id` FROM `item` WHERE `unseen` AND `id` IN (%s)", $idlist);

			if ($unseen)
				$r = q("UPDATE `item` SET `unseen` = 0 WHERE `unseen` AND `id` IN (%s)", $idlist);
		}

		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
				break;
		}

		return  api_format_data("statuses", $type, $data);
	}
	api_register_func('api/statuses/home_timeline','api_statuses_home_timeline', true);
	api_register_func('api/statuses/friends_timeline','api_statuses_home_timeline', true);

	function api_statuses_public_timeline($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);
		// get last newtork messages


		// params
		$count = (x($_REQUEST,'count')?$_REQUEST['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;
		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);
		//$since_id = 0;//$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$exclude_replies = (x($_REQUEST,'exclude_replies')?1:0);
		$conversation_id = (x($_REQUEST,'conversation_id')?$_REQUEST['conversation_id']:0);

		$start = $page*$count;

		if ($max_id > 0)
			$sql_extra = 'AND `item`.`id` <= '.intval($max_id);
		if ($exclude_replies > 0)
			$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
		if ($conversation_id > 0)
			$sql_extra .= ' AND `item`.`parent` = '.intval($conversation_id);

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`self`, `contact`.`writable`,
			`contact`.`id` AS `cid`,
			`user`.`nickname`, `user`.`hidewall`
			FROM `item`
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			STRAIGHT_JOIN `user` ON `user`.`uid` = `item`.`uid`
				AND NOT `user`.`hidewall`
			WHERE `verb` = '%s' AND `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
			AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
			AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
			AND NOT `item`.`private` AND `item`.`wall`
			$sql_extra
			AND `item`.`id`>%d
			ORDER BY `item`.`id` DESC LIMIT %d, %d ",
			dbesc(ACTIVITY_POST),
			intval($since_id),
			intval($start),
			intval($count));

		$ret = api_format_items($r,$user_info, false, $type);


		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
				break;
		}

		return  api_format_data("statuses", $type, $data);
	}
	api_register_func('api/statuses/public_timeline','api_statuses_public_timeline', true);

	/**
	 *
	 */
	function api_statuses_show($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);

		// params
		$id = intval($a->argv[3]);

		if ($id == 0)
			$id = intval($_REQUEST["id"]);

		// Hotot workaround
		if ($id == 0)
			$id = intval($a->argv[4]);

		logger('API: api_statuses_show: '.$id);

		$conversation = (x($_REQUEST,'conversation')?1:0);

		$sql_extra = '';
		if ($conversation)
			$sql_extra .= " AND `item`.`parent` = %d ORDER BY `id` ASC ";
		else
			$sql_extra .= " AND `item`.`id` = %d";

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item`
			INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			AND `item`.`uid` = %d AND `item`.`verb` = '%s'
			$sql_extra",
			intval(api_user()),
			dbesc(ACTIVITY_POST),
			intval($id)
		);

		if (!$r) {
			throw new BadRequestException("There is no status with this id.");
		}

		$ret = api_format_items($r,$user_info, false, $type);

		if ($conversation) {
			$data = array('status' => $ret);
			return api_format_data("statuses", $type, $data);
		} else {
			$data = array('status' => $ret[0]);
			return  api_format_data("status", $type, $data);
		}
	}
	api_register_func('api/statuses/show','api_statuses_show', true);


	/**
	 *
	 */
	function api_conversation_show($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);

		// params
		$id = intval($a->argv[3]);
		$count = (x($_REQUEST,'count')?$_REQUEST['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;
		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);

		$start = $page*$count;

		if ($id == 0)
			$id = intval($_REQUEST["id"]);

		// Hotot workaround
		if ($id == 0)
			$id = intval($a->argv[4]);

		logger('API: api_conversation_show: '.$id);

		$r = q("SELECT `parent` FROM `item` WHERE `id` = %d", intval($id));
		if ($r)
			$id = $r[0]["parent"];

		$sql_extra = '';

		if ($max_id > 0)
			$sql_extra = ' AND `item`.`id` <= '.intval($max_id);

		// Not sure why this query was so complicated. We should keep it here for a while,
		// just to make sure that we really don't need it.
		//	FROM `item` INNER JOIN (SELECT `uri`,`parent` FROM `item` WHERE `id` = %d) AS `temp1`
		//	ON (`item`.`thr-parent` = `temp1`.`uri` AND `item`.`parent` = `temp1`.`parent`)

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item`
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`parent` = %d AND `item`.`visible`
			AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			AND `item`.`uid` = %d AND `item`.`verb` = '%s'
			AND `item`.`id`>%d $sql_extra
			ORDER BY `item`.`id` DESC LIMIT %d ,%d",
			intval($id), intval(api_user()),
			dbesc(ACTIVITY_POST),
			intval($since_id),
			intval($start), intval($count)
		);

		if (!$r)
			throw new BadRequestException("There is no conversation with this id.");

		$ret = api_format_items($r,$user_info, false, $type);

		$data = array('status' => $ret);
		return api_format_data("statuses", $type, $data);
	}
	api_register_func('api/conversation/show','api_conversation_show', true);
	api_register_func('api/statusnet/conversation','api_conversation_show', true);


	/**
	 *
	 */
	function api_statuses_repeat($type){
		global $called_api;

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);

		// params
		$id = intval($a->argv[3]);

		if ($id == 0)
			$id = intval($_REQUEST["id"]);

		// Hotot workaround
		if ($id == 0)
			$id = intval($a->argv[4]);

		logger('API: api_statuses_repeat: '.$id);

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`, `contact`.`nick` as `reply_author`,
			`contact`.`name`, `contact`.`photo` as `reply_photo`, `contact`.`url` as `reply_url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item`
			INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			AND NOT `item`.`private` AND `item`.`allow_cid` = '' AND `item`.`allow`.`gid` = ''
			AND `item`.`deny_cid` = '' AND `item`.`deny_gid` = ''
			$sql_extra
			AND `item`.`id`=%d",
			intval($id)
		);

		if ($r[0]['body'] != "") {
			if (!intval(get_config('system','old_share'))) {
				if (strpos($r[0]['body'], "[/share]") !== false) {
					$pos = strpos($r[0]['body'], "[share");
					$post = substr($r[0]['body'], $pos);
				} else {
					$post = share_header($r[0]['author-name'], $r[0]['author-link'], $r[0]['author-avatar'], $r[0]['guid'], $r[0]['created'], $r[0]['plink']);

					$post .= $r[0]['body'];
					$post .= "[/share]";
				}
				$_REQUEST['body'] = $post;
			} else
				$_REQUEST['body'] = html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8')."[url=".$r[0]['reply_url']."]".$r[0]['reply_author']."[/url] \n".$r[0]['body'];

			$_REQUEST['profile_uid'] = api_user();
			$_REQUEST['type'] = 'wall';
			$_REQUEST['api_source'] = true;

			if (!x($_REQUEST, "source"))
				$_REQUEST["source"] = api_source();

			item_post($a);
		} else
			throw new ForbiddenException();

		// this should output the last post (the one we just posted).
		$called_api = null;
		return(api_status_show($type));
	}
	api_register_func('api/statuses/retweet','api_statuses_repeat', true, API_METHOD_POST);

	/**
	 *
	 */
	function api_statuses_destroy($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);

		// params
		$id = intval($a->argv[3]);

		if ($id == 0)
			$id = intval($_REQUEST["id"]);

		// Hotot workaround
		if ($id == 0)
			$id = intval($a->argv[4]);

		logger('API: api_statuses_destroy: '.$id);

		$ret = api_statuses_show($type);

		drop_item($id, false);

		return($ret);
	}
	api_register_func('api/statuses/destroy','api_statuses_destroy', true, API_METHOD_DELETE);

	/**
	 *
	 * http://developer.twitter.com/doc/get/statuses/mentions
	 *
	 */
	function api_statuses_mentions($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		unset($_REQUEST["user_id"]);
		unset($_GET["user_id"]);

		unset($_REQUEST["screen_name"]);
		unset($_GET["screen_name"]);

		$user_info = api_get_user($a);
		// get last newtork messages


		// params
		$count = (x($_REQUEST,'count')?$_REQUEST['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;
		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);
		//$since_id = 0;//$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);

		$start = $page*$count;

		// Ugly code - should be changed
		$myurl = App::get_baseurl() . '/profile/'. $a->user['nickname'];
		$myurl = substr($myurl,strpos($myurl,'://')+3);
		//$myurl = str_replace(array('www.','.'),array('','\\.'),$myurl);
		$myurl = str_replace('www.','',$myurl);
		$diasp_url = str_replace('/profile/','/u/',$myurl);

		if ($max_id > 0)
			$sql_extra = ' AND `item`.`id` <= '.intval($max_id);

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item` FORCE INDEX (`uid_id`)
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`uid` = %d AND `verb` = '%s'
			AND NOT (`item`.`author-link` IN ('https://%s', 'http://%s'))
			AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			AND `item`.`parent` IN (SELECT `iid` FROM `thread` WHERE `uid` = %d AND `mention` AND !`ignored`)
			$sql_extra
			AND `item`.`id`>%d
			ORDER BY `item`.`id` DESC LIMIT %d ,%d ",
			intval(api_user()),
			dbesc(ACTIVITY_POST),
			dbesc(protect_sprintf($myurl)),
			dbesc(protect_sprintf($myurl)),
			intval(api_user()),
			intval($since_id),
			intval($start),	intval($count)
		);

		$ret = api_format_items($r,$user_info, false, $type);


		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
				break;
		}

		return  api_format_data("statuses", $type, $data);
	}
	api_register_func('api/statuses/mentions','api_statuses_mentions', true);
	api_register_func('api/statuses/replies','api_statuses_mentions', true);


	function api_statuses_user_timeline($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$user_info = api_get_user($a);
		// get last network messages

		logger("api_statuses_user_timeline: api_user: ". api_user() .
			   "\nuser_info: ".print_r($user_info, true) .
			   "\n_REQUEST:  ".print_r($_REQUEST, true),
			   LOGGER_DEBUG);

		// params
		$count = (x($_REQUEST,'count')?$_REQUEST['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;
		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		//$since_id = 0;//$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$exclude_replies = (x($_REQUEST,'exclude_replies')?1:0);
		$conversation_id = (x($_REQUEST,'conversation_id')?$_REQUEST['conversation_id']:0);

		$start = $page*$count;

		$sql_extra = '';
		if ($user_info['self']==1)
			$sql_extra .= " AND `item`.`wall` = 1 ";

		if ($exclude_replies > 0)
			$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
		if ($conversation_id > 0)
			$sql_extra .= ' AND `item`.`parent` = '.intval($conversation_id);

		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item` FORCE INDEX (`uid_contactid_id`)
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`uid` = %d AND `verb` = '%s'
			AND `item`.`contact-id` = %d
			AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			$sql_extra
			AND `item`.`id`>%d
			ORDER BY `item`.`id` DESC LIMIT %d ,%d ",
			intval(api_user()),
			dbesc(ACTIVITY_POST),
			intval($user_info['cid']),
			intval($since_id),
			intval($start),	intval($count)
		);

		$ret = api_format_items($r,$user_info, true, $type);

		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
		}

		return  api_format_data("statuses", $type, $data);
	}
	api_register_func('api/statuses/user_timeline','api_statuses_user_timeline', true);


	/**
	 * Star/unstar an item
	 * param: id : id of the item
	 *
	 * api v1 : https://web.archive.org/web/20131019055350/https://dev.twitter.com/docs/api/1/post/favorites/create/%3Aid
	 */
	function api_favorites_create_destroy($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// for versioned api.
		/// @TODO We need a better global soluton
		$action_argv_id=2;
		if ($a->argv[1]=="1.1") $action_argv_id=3;

		if ($a->argc<=$action_argv_id) throw new BadRequestException("Invalid request.");
		$action = str_replace(".".$type,"",$a->argv[$action_argv_id]);
		if ($a->argc==$action_argv_id+2) {
			$itemid = intval($a->argv[$action_argv_id+1]);
		} else {
			$itemid = intval($_REQUEST['id']);
		}

		$item = q("SELECT * FROM item WHERE id=%d AND uid=%d",
				$itemid, api_user());

		if ($item===false || count($item)==0)
			throw new BadRequestException("Invalid item.");

		switch($action){
			case "create":
				$item[0]['starred']=1;
				break;
			case "destroy":
				$item[0]['starred']=0;
				break;
			default:
				throw new BadRequestException("Invalid action ".$action);
		}
		$r = q("UPDATE item SET starred=%d WHERE id=%d AND uid=%d",
				$item[0]['starred'], $itemid, api_user());

		q("UPDATE thread SET starred=%d WHERE iid=%d AND uid=%d",
			$item[0]['starred'], $itemid, api_user());

		if ($r===false)
			throw InternalServerErrorException("DB error");


		$user_info = api_get_user($a);
		$rets = api_format_items($item, $user_info, false, $type);
		$ret = $rets[0];

		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
		}

		return api_format_data("status", $type, $data);
	}
	api_register_func('api/favorites/create', 'api_favorites_create_destroy', true, API_METHOD_POST);
	api_register_func('api/favorites/destroy', 'api_favorites_create_destroy', true, API_METHOD_DELETE);

	function api_favorites($type){
		global $called_api;

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		$called_api= array();

		$user_info = api_get_user($a);

		// in friendica starred item are private
		// return favorites only for self
		logger('api_favorites: self:' . $user_info['self']);

		if ($user_info['self']==0) {
			$ret = array();
		} else {
			$sql_extra = "";

			// params
			$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
			$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);
			$count = (x($_GET,'count')?$_GET['count']:20);
			$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
			if ($page<0) $page=0;

			$start = $page*$count;

			if ($max_id > 0)
				$sql_extra .= ' AND `item`.`id` <= '.intval($max_id);

			$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
				`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
				`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
				`contact`.`id` AS `cid`
				FROM `item`, `contact`
				WHERE `item`.`uid` = %d
				AND `item`.`visible` = 1 and `item`.`moderated` = 0 AND `item`.`deleted` = 0
				AND `item`.`starred` = 1
				AND `contact`.`id` = `item`.`contact-id`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
				$sql_extra
				AND `item`.`id`>%d
				ORDER BY `item`.`id` DESC LIMIT %d ,%d ",
				intval(api_user()),
				intval($since_id),
				intval($start),	intval($count)
			);

			$ret = api_format_items($r,$user_info, false, $type);

		}

		$data = array('status' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
		}

		return  api_format_data("statuses", $type, $data);
	}
	api_register_func('api/favorites','api_favorites', true);

	function api_format_messages($item, $recipient, $sender) {
		// standard meta information
		$ret=Array(
				'id'                    => $item['id'],
				'sender_id'             => $sender['id'] ,
				'text'                  => "",
				'recipient_id'          => $recipient['id'],
				'created_at'            => api_date($item['created']),
				'sender_screen_name'    => $sender['screen_name'],
				'recipient_screen_name' => $recipient['screen_name'],
				'sender'                => $sender,
				'recipient'             => $recipient,
				'title'			=> "",
				'friendica_seen'	=> $item['seen'],
				'friendica_parent_uri'	=> $item['parent-uri'],
		);

		// "uid" and "self" are only needed for some internal stuff, so remove it from here
		unset($ret["sender"]["uid"]);
		unset($ret["sender"]["self"]);
		unset($ret["recipient"]["uid"]);
		unset($ret["recipient"]["self"]);

		//don't send title to regular StatusNET requests to avoid confusing these apps
		if (x($_GET, 'getText')) {
			$ret['title'] = $item['title'] ;
			if ($_GET["getText"] == "html") {
				$ret['text'] = bbcode($item['body'], false, false);
			}
			elseif ($_GET["getText"] == "plain") {
				//$ret['text'] = html2plain(bbcode($item['body'], false, false, true), 0);
				$ret['text'] = trim(html2plain(bbcode(api_clean_plain_items($item['body']), false, false, 2, true), 0));
			}
		}
		else {
			$ret['text'] = $item['title']."\n".html2plain(bbcode(api_clean_plain_items($item['body']), false, false, 2, true), 0);
		}
		if (isset($_GET["getUserObjects"]) && $_GET["getUserObjects"] == "false") {
			unset($ret['sender']);
			unset($ret['recipient']);
		}

		return $ret;
	}

	function api_convert_item($item) {
		$body = $item['body'];
		$attachments = api_get_attachments($body);

		// Workaround for ostatus messages where the title is identically to the body
		$html = bbcode(api_clean_plain_items($body), false, false, 2, true);
		$statusbody = trim(html2plain($html, 0));

		// handle data: images
		$statusbody = api_format_items_embeded_images($item,$statusbody);

		$statustitle = trim($item['title']);

		if (($statustitle != '') and (strpos($statusbody, $statustitle) !== false))
			$statustext = trim($statusbody);
		else
			$statustext = trim($statustitle."\n\n".$statusbody);

		if (($item["network"] == NETWORK_FEED) and (strlen($statustext)> 1000))
			$statustext = substr($statustext, 0, 1000)."... \n".$item["plink"];

		$statushtml = trim(bbcode($body, false, false));

		$search = array("<br>", "<blockquote>", "</blockquote>",
				"<h1>", "</h1>", "<h2>", "</h2>",
				"<h3>", "</h3>", "<h4>", "</h4>",
				"<h5>", "</h5>", "<h6>", "</h6>");
		$replace = array("<br>\n", "\n<blockquote>", "</blockquote>\n",
				"\n<h1>", "</h1>\n", "\n<h2>", "</h2>\n",
				"\n<h3>", "</h3>\n", "\n<h4>", "</h4>\n",
				"\n<h5>", "</h5>\n", "\n<h6>", "</h6>\n");
		$statushtml = str_replace($search, $replace, $statushtml);

		if ($item['title'] != "")
			$statushtml = "<h4>".bbcode($item['title'])."</h4>\n".$statushtml;

		$entities = api_get_entitities($statustext, $body);

		return array(
			"text" => $statustext,
			"html" => $statushtml,
			"attachments" => $attachments,
			"entities" => $entities
		);
	}

	function api_get_attachments(&$body) {

		$text = $body;
		$text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);

		$URLSearchString = "^\[\]";
		$ret = preg_match_all("/\[img\]([$URLSearchString]*)\[\/img\]/ism", $text, $images);

		if (!$ret)
			return false;

		$attachments = array();

		foreach ($images[1] AS $image) {
			$imagedata = get_photo_info($image);

			if ($imagedata)
				$attachments[] = array("url" => $image, "mimetype" => $imagedata["mime"], "size" => $imagedata["size"]);
		}

		if (strstr($_SERVER['HTTP_USER_AGENT'], "AndStatus"))
			foreach ($images[0] AS $orig)
				$body = str_replace($orig, "", $body);

		return $attachments;
	}

	function api_get_entitities(&$text, $bbcode) {
		/*
		To-Do:
		* Links at the first character of the post
		*/

		$a = get_app();

		$include_entities = strtolower(x($_REQUEST,'include_entities')?$_REQUEST['include_entities']:"false");

		if ($include_entities != "true") {

			preg_match_all("/\[img](.*?)\[\/img\]/ism", $bbcode, $images);

			foreach ($images[1] AS $image) {
				$replace = proxy_url($image);
				$text = str_replace($image, $replace, $text);
			}
			return array();
		}

		$bbcode = bb_CleanPictureLinks($bbcode);

		// Change pure links in text to bbcode uris
		$bbcode = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2]$2[/url]', $bbcode);

		$entities = array();
		$entities["hashtags"] = array();
		$entities["symbols"] = array();
		$entities["urls"] = array();
		$entities["user_mentions"] = array();

		$URLSearchString = "^\[\]";

		$bbcode = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",'#$2',$bbcode);

		$bbcode = preg_replace("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",'[url=$1]$2[/url]',$bbcode);
		//$bbcode = preg_replace("/\[url\](.*?)\[\/url\]/ism",'[url=$1]$1[/url]',$bbcode);
		$bbcode = preg_replace("/\[video\](.*?)\[\/video\]/ism",'[url=$1]$1[/url]',$bbcode);

		$bbcode = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
					'[url=https://www.youtube.com/watch?v=$1]https://www.youtube.com/watch?v=$1[/url]', $bbcode);
		$bbcode = preg_replace("/\[youtube\](.*?)\[\/youtube\]/ism",'[url=$1]$1[/url]',$bbcode);

		$bbcode = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
					'[url=https://vimeo.com/$1]https://vimeo.com/$1[/url]', $bbcode);
		$bbcode = preg_replace("/\[vimeo\](.*?)\[\/vimeo\]/ism",'[url=$1]$1[/url]',$bbcode);

		$bbcode = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $bbcode);

		//preg_match_all("/\[url\]([$URLSearchString]*)\[\/url\]/ism", $bbcode, $urls1);
		preg_match_all("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $bbcode, $urls);

		$ordered_urls = array();
		foreach ($urls[1] AS $id=>$url) {
			//$start = strpos($text, $url, $offset);
			$start = iconv_strpos($text, $url, 0, "UTF-8");
			if (!($start === false))
				$ordered_urls[$start] = array("url" => $url, "title" => $urls[2][$id]);
		}

		ksort($ordered_urls);

		$offset = 0;
		//foreach ($urls[1] AS $id=>$url) {
		foreach ($ordered_urls AS $url) {
			if ((substr($url["title"], 0, 7) != "http://") AND (substr($url["title"], 0, 8) != "https://") AND
				!strpos($url["title"], "http://") AND !strpos($url["title"], "https://"))
				$display_url = $url["title"];
			else {
				$display_url = str_replace(array("http://www.", "https://www."), array("", ""), $url["url"]);
				$display_url = str_replace(array("http://", "https://"), array("", ""), $display_url);

				if (strlen($display_url) > 26)
					$display_url = substr($display_url, 0, 25)."…";
			}

			//$start = strpos($text, $url, $offset);
			$start = iconv_strpos($text, $url["url"], $offset, "UTF-8");
			if (!($start === false)) {
				$entities["urls"][] = array("url" => $url["url"],
								"expanded_url" => $url["url"],
								"display_url" => $display_url,
								"indices" => array($start, $start+strlen($url["url"])));
				$offset = $start + 1;
			}
		}

		preg_match_all("/\[img](.*?)\[\/img\]/ism", $bbcode, $images);
		$ordered_images = array();
		foreach ($images[1] AS $image) {
			//$start = strpos($text, $url, $offset);
			$start = iconv_strpos($text, $image, 0, "UTF-8");
			if (!($start === false))
				$ordered_images[$start] = $image;
		}
		//$entities["media"] = array();
		$offset = 0;

		foreach ($ordered_images AS $url) {
			$display_url = str_replace(array("http://www.", "https://www."), array("", ""), $url);
			$display_url = str_replace(array("http://", "https://"), array("", ""), $display_url);

			if (strlen($display_url) > 26)
				$display_url = substr($display_url, 0, 25)."…";

			$start = iconv_strpos($text, $url, $offset, "UTF-8");
			if (!($start === false)) {
				$image = get_photo_info($url);
				if ($image) {
					// If image cache is activated, then use the following sizes:
					// thumb  (150), small (340), medium (600) and large (1024)
					if (!get_config("system", "proxy_disabled")) {
						$media_url = proxy_url($url);

						$sizes = array();
						$scale = scale_image($image[0], $image[1], 150);
						$sizes["thumb"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");

						if (($image[0] > 150) OR ($image[1] > 150)) {
							$scale = scale_image($image[0], $image[1], 340);
							$sizes["small"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
						}

						$scale = scale_image($image[0], $image[1], 600);
						$sizes["medium"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");

						if (($image[0] > 600) OR ($image[1] > 600)) {
							$scale = scale_image($image[0], $image[1], 1024);
							$sizes["large"] = array("w" => $scale["width"], "h" => $scale["height"], "resize" => "fit");
						}
					} else {
						$media_url = $url;
						$sizes["medium"] = array("w" => $image[0], "h" => $image[1], "resize" => "fit");
					}

					$entities["media"][] = array(
								"id" => $start+1,
								"id_str" => (string)$start+1,
								"indices" => array($start, $start+strlen($url)),
								"media_url" => normalise_link($media_url),
								"media_url_https" => $media_url,
								"url" => $url,
								"display_url" => $display_url,
								"expanded_url" => $url,
								"type" => "photo",
								"sizes" => $sizes);
				}
				$offset = $start + 1;
			}
		}

		return($entities);
	}
	function api_format_items_embeded_images(&$item, $text){
		$text = preg_replace_callback(
				"|data:image/([^;]+)[^=]+=*|m",
				function($match) use ($item) {
					return App::get_baseurl()."/display/".$item['guid'];
				},
				$text);
		return $text;
	}


	/**
	 * @brief return <a href='url'>name</a> as array
	 *
	 * @param string $txt
	 * @return array
	 * 			name => 'name'
	 * 			'url => 'url'
	 */
	function api_contactlink_to_array($txt) {
		$match = array();
		$r = preg_match_all('|<a href="([^"]*)">([^<]*)</a>|', $txt, $match);
		if ($r && count($match)==3) {
			$res = array(
				'name' => $match[2],
				'url' => $match[1]
			);
		} else {
			$res = array(
				'name' => $text,
				'url' => ""
			);
		}
		return $res;
	}


	/**
	 * @brief return likes, dislikes and attend status for item
	 *
	 * @param array $item
	 * @return array
	 * 			likes => int count
	 * 			dislikes => int count
	 */
	function api_format_items_activities(&$item, $type = "json") {
		$activities = array(
			'like' => array(),
			'dislike' => array(),
			'attendyes' => array(),
			'attendno' => array(),
			'attendmaybe' => array()
		);

		$items = q('SELECT * FROM item
					WHERE uid=%d AND `thr-parent`="%s" AND visible AND NOT deleted',
					intval($item['uid']),
					dbesc($item['uri']));

		foreach ($items as $i){
			// not used as result should be structured like other user data
			//builtin_activity_puller($i, $activities);

			// get user data and add it to the array of the activity
			$user = api_get_user($a, $i['author-link']);
			switch($i['verb']) {
				case ACTIVITY_LIKE:
					$activities['like'][] = $user;
					break;
				case ACTIVITY_DISLIKE:
					$activities['dislike'][] = $user;
					break;
				case ACTIVITY_ATTEND:
					$activities['attendyes'][] = $user;
					break;
				case ACTIVITY_ATTENDNO:
					$activities['attendno'][] = $user;
					break;
				case ACTIVITY_ATTENDMAYBE:
					$activities['attendmaybe'][] = $user;
					break;
				default:
					break;
			}
		}

		if ($type == "xml") {
			$xml_activities = array();
			foreach ($activities as $k => $v) {
				// change xml element from "like" to "friendica:like"
				$xml_activities["friendica:".$k] = $v;
				// add user data into xml output
				$k_user = 0;
				foreach ($v as $user)
					$xml_activities["friendica:".$k][$k_user++.":user"] = $user;
			}
			$activities = $xml_activities;
		}

		return $activities;

	}


	/**
	 * @brief return data from profiles
	 *
	 * @param array $profile array containing data from db table 'profile'
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return array
	 */
	function api_format_items_profiles(&$profile = null, $type = "json") {
		if ($profile != null) {
			$profile = array('profile_id' => $profile['id'],
							'profile_name' => $profile['profile-name'],
							'is_default' => $profile['is-default'] ? true : false,
							'hide_friends'=> $profile['hide-friends'] ? true : false,
							'profile_photo' => $profile['photo'],
							'profile_thumb' => $profile['thumb'],
							'publish' => $profile['publish'] ? true : false,
							'net_publish' => $profile['net-publish'] ? true : false,
							'description' => $profile['pdesc'],
							'date_of_birth' => $profile['dob'],
							'address' => $profile['address'],
							'city' => $profile['locality'],
							'region' => $profile['region'],
							'postal_code' => $profile['postal-code'],
							'country' => $profile['country-name'],
							'hometown' => $profile['hometown'],
							'gender' => $profile['gender'],
							'marital' => $profile['marital'],
							'marital_with' => $profile['with'],
							'marital_since' => $profile['howlong'],
							'sexual' => $profile['sexual'],
							'politic' => $profile['politic'],
							'religion' => $profile['religion'],
							'public_keywords' => $profile['pub_keywords'],
							'private_keywords' => $profile['prv_keywords'],
							'likes' => bbcode(api_clean_plain_items($profile['likes']), false, false, 2, false),
							'dislikes' => bbcode(api_clean_plain_items($profile['dislikes']), false, false, 2, false),
							'about' => bbcode(api_clean_plain_items($profile['about']), false, false, 2, false),
							'music' => bbcode(api_clean_plain_items($profile['music']), false, false, 2, false),
							'book' => bbcode(api_clean_plain_items($profile['book']), false, false, 2, false),
							'tv' => bbcode(api_clean_plain_items($profile['tv']), false, false, 2, false),
							'film' => bbcode(api_clean_plain_items($profile['film']), false, false, 2, false),
							'interest' => bbcode(api_clean_plain_items($profile['interest']), false, false, 2, false),
							'romance' => bbcode(api_clean_plain_items($profile['romance']), false, false, 2, false),
							'work' => bbcode(api_clean_plain_items($profile['work']), false, false, 2, false),
							'education' => bbcode(api_clean_plain_items($profile['education']), false, false, 2, false),
							'social_networks' => bbcode(api_clean_plain_items($profile['contact']), false, false, 2, false),
							'homepage' => $profile['homepage'],
							'users' => null);
			return $profile;
		} 
	}

	/**
	 * @brief format items to be returned by api
	 *
	 * @param array $r array of items
	 * @param array $user_info
	 * @param bool $filter_user filter items by $user_info
	 */
	function api_format_items($r,$user_info, $filter_user = false, $type = "json") {

		$a = get_app();

		$ret = Array();

		foreach($r as $item) {

			localize_item($item);
			list($status_user, $owner_user) = api_item_get_user($a,$item);

			// Look if the posts are matching if they should be filtered by user id
			if ($filter_user AND ($status_user["id"] != $user_info["id"]))
				continue;

			$in_reply_to = api_in_reply_to($item);

			$converted = api_convert_item($item);

			if ($type == "xml")
				$geo = "georss:point";
			else
				$geo = "geo";

			$status = array(
				'text'		=> $converted["text"],
				'truncated' => False,
				'created_at'=> api_date($item['created']),
				'in_reply_to_status_id' => $in_reply_to['status_id'],
				'in_reply_to_status_id_str' => $in_reply_to['status_id_str'],
				'source'    => (($item['app']) ? $item['app'] : 'web'),
				'id'		=> intval($item['id']),
				'id_str'	=> (string) intval($item['id']),
				'in_reply_to_user_id' => $in_reply_to['user_id'],
				'in_reply_to_user_id_str' => $in_reply_to['user_id_str'],
				'in_reply_to_screen_name' => $in_reply_to['screen_name'],
				$geo => NULL,
				'favorited' => $item['starred'] ? true : false,
				'user' =>  $status_user ,
				'friendica_owner' => $owner_user,
				//'entities' => NULL,
				'statusnet_html'		=> $converted["html"],
				'statusnet_conversation_id'	=> $item['parent'],
				'friendica_activities' => api_format_items_activities($item, $type),
			);

			if (count($converted["attachments"]) > 0)
				$status["attachments"] = $converted["attachments"];

			if (count($converted["entities"]) > 0)
				$status["entities"] = $converted["entities"];

			if (($item['item_network'] != "") AND ($status["source"] == 'web'))
				$status["source"] = network_to_name($item['item_network'], $user_info['url']);
			else if (($item['item_network'] != "") AND (network_to_name($item['item_network'], $user_info['url']) != $status["source"]))
				$status["source"] = trim($status["source"].' ('.network_to_name($item['item_network'], $user_info['url']).')');


			// Retweets are only valid for top postings
			// It doesn't work reliable with the link if its a feed
			#$IsRetweet = ($item['owner-link'] != $item['author-link']);
			#if ($IsRetweet)
			#	$IsRetweet = (($item['owner-name'] != $item['author-name']) OR ($item['owner-avatar'] != $item['author-avatar']));


			if ($item["id"] == $item["parent"]) {
				$retweeted_item = api_share_as_retweet($item);
				if ($retweeted_item !== false) {
					$retweeted_status = $status;
					try {
						$retweeted_status["user"] = api_get_user($a,$retweeted_item["author-link"]);
					} catch( BadRequestException $e ) {
						// user not found. should be found?
						/// @todo check if the user should be always found
						$retweeted_status["user"] = array();
					}

					$rt_converted = api_convert_item($retweeted_item);

					$retweeted_status['text'] = $rt_converted["text"];
					$retweeted_status['statusnet_html'] = $rt_converted["html"];
					$retweeted_status['friendica_activities'] = api_format_items_activities($retweeted_item, $type);
					$retweeted_status['created_at'] =  api_date($retweeted_item['created']);
					$status['retweeted_status'] = $retweeted_status;
				}
			}

			// "uid" and "self" are only needed for some internal stuff, so remove it from here
			unset($status["user"]["uid"]);
			unset($status["user"]["self"]);

			if ($item["coord"] != "") {
				$coords = explode(' ',$item["coord"]);
				if (count($coords) == 2) {
					if ($type == "json")
						$status["geo"] = array('type' => 'Point',
								'coordinates' => array((float) $coords[0],
											(float) $coords[1]));
					else // Not sure if this is the official format - if someone founds a documentation we can check
						$status["georss:point"] = $item["coord"];
				}
			}
			$ret[] = $status;
		};
		return $ret;
	}


	function api_account_rate_limit_status($type) {

		if ($type == "xml")
			$hash = array(
					'remaining-hits' => (string) 150,
					'@attributes' => array("type" => "integer"),
					'hourly-limit' => (string) 150,
					'@attributes2' => array("type" => "integer"),
					'reset-time' => datetime_convert('UTC','UTC','now + 1 hour',ATOM_TIME),
					'@attributes3' => array("type" => "datetime"),
					'reset_time_in_seconds' => strtotime('now + 1 hour'),
					'@attributes4' => array("type" => "integer"),
				);
		else
			$hash = array(
					'reset_time_in_seconds' => strtotime('now + 1 hour'),
					'remaining_hits' => (string) 150,
					'hourly_limit' => (string) 150,
					'reset_time' => api_date(datetime_convert('UTC','UTC','now + 1 hour',ATOM_TIME)),
				);

		return api_format_data('hash', $type, array('hash' => $hash));
	}
	api_register_func('api/account/rate_limit_status','api_account_rate_limit_status',true);

	function api_help_test($type) {
		if ($type == 'xml')
			$ok = "true";
		else
			$ok = "ok";

		return api_format_data('ok', $type, array("ok" => $ok));
	}
	api_register_func('api/help/test','api_help_test',false);

	function api_lists($type) {
		$ret = array();
		return api_format_data('lists', $type, array("lists_list" => $ret));
	}
	api_register_func('api/lists','api_lists',true);

	function api_lists_list($type) {
		$ret = array();
		return api_format_data('lists', $type, array("lists_list" => $ret));
	}
	api_register_func('api/lists/list','api_lists_list',true);

	/**
	 *  https://dev.twitter.com/docs/api/1/get/statuses/friends
	 *  This function is deprecated by Twitter
	 *  returns: json, xml
	 **/
	function api_statuses_f($type, $qtype) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();
		$user_info = api_get_user($a);

		if (x($_GET,'cursor') && $_GET['cursor']=='undefined'){
			/* this is to stop Hotot to load friends multiple times
			*  I'm not sure if I'm missing return something or
			*  is a bug in hotot. Workaround, meantime
			*/

			/*$ret=Array();
			return array('$users' => $ret);*/
			return false;
		}

		if($qtype == 'friends')
			$sql_extra = sprintf(" AND ( `rel` = %d OR `rel` = %d ) ", intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND));
		if($qtype == 'followers')
			$sql_extra = sprintf(" AND ( `rel` = %d OR `rel` = %d ) ", intval(CONTACT_IS_FOLLOWER), intval(CONTACT_IS_FRIEND));

		// friends and followers only for self
		if ($user_info['self'] == 0)
			$sql_extra = " AND false ";

		$r = q("SELECT `nurl` FROM `contact` WHERE `uid` = %d AND NOT `self` AND (NOT `blocked` OR `pending`) $sql_extra",
			intval(api_user())
		);

		$ret = array();
		foreach($r as $cid){
			$user = api_get_user($a, $cid['nurl']);
			// "uid" and "self" are only needed for some internal stuff, so remove it from here
			unset($user["uid"]);
			unset($user["self"]);

			if ($user)
				$ret[] = $user;
		}

		return array('user' => $ret);

	}
	function api_statuses_friends($type){
		$data =  api_statuses_f($type, "friends");
		if ($data===false) return false;
		return  api_format_data("users", $type, $data);
	}
	function api_statuses_followers($type){
		$data = api_statuses_f($type, "followers");
		if ($data===false) return false;
		return  api_format_data("users", $type, $data);
	}
	api_register_func('api/statuses/friends','api_statuses_friends',true);
	api_register_func('api/statuses/followers','api_statuses_followers',true);






	function api_statusnet_config($type) {

		$a = get_app();

		$name = $a->config['sitename'];
		$server = $a->get_hostname();
		$logo = App::get_baseurl() . '/images/friendica-64.png';
		$email = $a->config['admin_email'];
		$closed = (($a->config['register_policy'] == REGISTER_CLOSED) ? 'true' : 'false');
		$private = (($a->config['system']['block_public']) ? 'true' : 'false');
		$textlimit = (string) (($a->config['max_import_size']) ? $a->config['max_import_size'] : 200000);
		if($a->config['api_import_size'])
			$texlimit = string($a->config['api_import_size']);
		$ssl = (($a->config['system']['have_ssl']) ? 'true' : 'false');
		$sslserver = (($ssl === 'true') ? str_replace('http:','https:',App::get_baseurl()) : '');

		$config = array(
			'site' => array('name' => $name,'server' => $server, 'theme' => 'default', 'path' => '',
				'logo' => $logo, 'fancy' => true, 'language' => 'en', 'email' => $email, 'broughtby' => '',
				'broughtbyurl' => '', 'timezone' => 'UTC', 'closed' => $closed, 'inviteonly' => false,
				'private' => $private, 'textlimit' => $textlimit, 'sslserver' => $sslserver, 'ssl' => $ssl,
				'shorturllength' => '30',
				'friendica' => array(
						'FRIENDICA_PLATFORM' => FRIENDICA_PLATFORM,
						'FRIENDICA_VERSION' => FRIENDICA_VERSION,
						'DFRN_PROTOCOL_VERSION' => DFRN_PROTOCOL_VERSION,
						'DB_UPDATE_VERSION' => DB_UPDATE_VERSION
						)
			),
		);

		return api_format_data('config', $type, array('config' => $config));

	}
	api_register_func('api/statusnet/config','api_statusnet_config',false);

	function api_statusnet_version($type) {
		// liar
		$fake_statusnet_version = "0.9.7";

		return api_format_data('version', $type, array('version' => $fake_statusnet_version));
	}
	api_register_func('api/statusnet/version','api_statusnet_version',false);

	/**
	 * @todo use api_format_data() to return data
	 */
	function api_ff_ids($type,$qtype) {

		$a = get_app();

		if(! api_user()) throw new ForbiddenException();

		$user_info = api_get_user($a);

		if($qtype == 'friends')
			$sql_extra = sprintf(" AND ( `rel` = %d OR `rel` = %d ) ", intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND));
		if($qtype == 'followers')
			$sql_extra = sprintf(" AND ( `rel` = %d OR `rel` = %d ) ", intval(CONTACT_IS_FOLLOWER), intval(CONTACT_IS_FRIEND));

		if (!$user_info["self"])
			$sql_extra = " AND false ";

		$stringify_ids = (x($_REQUEST,'stringify_ids')?$_REQUEST['stringify_ids']:false);

		$r = q("SELECT `pcontact`.`id` FROM `contact`
				INNER JOIN `contact` AS `pcontact` ON `contact`.`nurl` = `pcontact`.`nurl` AND `pcontact`.`uid` = 0
				WHERE `contact`.`uid` = %s AND NOT `contact`.`self`",
			intval(api_user())
		);

		if (!dbm::is_result($r))
			return;

		$ids = array();
		foreach($r as $rr)
			if ($stringify_ids)
				$ids[] = $rr['id'];
			else
				$ids[] = intval($rr['id']);

		return api_format_data("ids", $type, array('id' => $ids));
	}

	function api_friends_ids($type) {
		return api_ff_ids($type,'friends');
	}
	function api_followers_ids($type) {
		return api_ff_ids($type,'followers');
	}
	api_register_func('api/friends/ids','api_friends_ids',true);
	api_register_func('api/followers/ids','api_followers_ids',true);


	function api_direct_messages_new($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		if (!x($_POST, "text") OR (!x($_POST,"screen_name") AND !x($_POST,"user_id"))) return;

		$sender = api_get_user($a);

		if ($_POST['screen_name']) {
			$r = q("SELECT `id`, `nurl`, `network` FROM `contact` WHERE `uid`=%d AND `nick`='%s'",
					intval(api_user()),
					dbesc($_POST['screen_name']));

			// Selecting the id by priority, friendica first
			api_best_nickname($r);

			$recipient = api_get_user($a, $r[0]['nurl']);
		} else
			$recipient = api_get_user($a, $_POST['user_id']);

		$replyto = '';
		$sub     = '';
		if (x($_REQUEST,'replyto')) {
			$r = q('SELECT `parent-uri`, `title` FROM `mail` WHERE `uid`=%d AND `id`=%d',
					intval(api_user()),
					intval($_REQUEST['replyto']));
			$replyto = $r[0]['parent-uri'];
			$sub     = $r[0]['title'];
		}
		else {
			if (x($_REQUEST,'title')) {
				$sub = $_REQUEST['title'];
			}
			else {
				$sub = ((strlen($_POST['text'])>10)?substr($_POST['text'],0,10)."...":$_POST['text']);
			}
		}

		$id = send_message($recipient['cid'], $_POST['text'], $sub, $replyto);

		if ($id>-1) {
			$r = q("SELECT * FROM `mail` WHERE id=%d", intval($id));
			$ret = api_format_messages($r[0], $recipient, $sender);

		} else {
			$ret = array("error"=>$id);
		}

		$data = Array('direct_message'=>$ret);

		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
		}

		return  api_format_data("direct-messages", $type, $data);

	}
	api_register_func('api/direct_messages/new','api_direct_messages_new',true, API_METHOD_POST);


	/**
	 * @brief delete a direct_message from mail table through api
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_direct_messages_destroy($type){
		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		//required
		$id = (x($_REQUEST,'id') ? $_REQUEST['id'] : 0);
		// optional
		$parenturi = (x($_REQUEST, 'friendica_parenturi') ? $_REQUEST['friendica_parenturi'] : "");
		$verbose = (x($_GET,'friendica_verbose')?strtolower($_GET['friendica_verbose']):"false");
		/// @todo optional parameter 'include_entities' from Twitter API not yet implemented

		$uid = $user_info['uid'];
		// error if no id or parenturi specified (for clients posting parent-uri as well)
		if ($verbose == "true") {
			if ($id == 0 || $parenturi == "") {
				$answer = array('result' => 'error', 'message' => 'message id or parenturi not specified');
				return api_format_data("direct_messages_delete", $type, array('$result' => $answer));
			}
		}

		// BadRequestException if no id specified (for clients using Twitter API)
		if ($id == 0) throw new BadRequestException('Message id not specified');

		// add parent-uri to sql command if specified by calling app		
		$sql_extra = ($parenturi != "" ? " AND `parent-uri` = '" . dbesc($parenturi) . "'" : "");

		// get data of the specified message id
		$r = q("SELECT `id` FROM `mail` WHERE `uid` = %d AND `id` = %d" . $sql_extra,
			intval($uid), 
			intval($id));
	
		// error message if specified id is not in database
		if (!dbm::is_result($r)) {
			if ($verbose == "true") {
				$answer = array('result' => 'error', 'message' => 'message id not in database');
				return api_format_data("direct_messages_delete", $type, array('$result' => $answer));
			}
			/// @todo BadRequestException ok for Twitter API clients?
			throw new BadRequestException('message id not in database');
		}

		// delete message
		$result = q("DELETE FROM `mail` WHERE `uid` = %d AND `id` = %d" . $sql_extra, 
			intval($uid), 
			intval($id));

		if ($verbose == "true") {
			if ($result) {
				// return success
				$answer = array('result' => 'ok', 'message' => 'message deleted');
				return api_format_data("direct_message_delete", $type, array('$result' => $answer));
			}
			else {
				$answer = array('result' => 'error', 'message' => 'unknown error');
				return api_format_data("direct_messages_delete", $type, array('$result' => $answer));
			}
		}
		/// @todo return JSON data like Twitter API not yet implemented

	}
	api_register_func('api/direct_messages/destroy', 'api_direct_messages_destroy', true, API_METHOD_DELETE);


	function api_direct_messages_box($type, $box, $verbose) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$count = (x($_GET,'count')?$_GET['count']:20);
		$page = (x($_REQUEST,'page')?$_REQUEST['page']-1:0);
		if ($page<0) $page=0;

		$since_id = (x($_REQUEST,'since_id')?$_REQUEST['since_id']:0);
		$max_id = (x($_REQUEST,'max_id')?$_REQUEST['max_id']:0);

		$user_id = (x($_REQUEST,'user_id')?$_REQUEST['user_id']:"");
		$screen_name = (x($_REQUEST,'screen_name')?$_REQUEST['screen_name']:"");

		//  caller user info
		unset($_REQUEST["user_id"]);
		unset($_GET["user_id"]);

		unset($_REQUEST["screen_name"]);
		unset($_GET["screen_name"]);

		$user_info = api_get_user($a);
		$profile_url = $user_info["url"];


		// pagination
		$start = $page*$count;

		// filters
		if ($box=="sentbox") {
			$sql_extra = "`mail`.`from-url`='".dbesc( $profile_url )."'";
		}
		elseif ($box=="conversation") {
			$sql_extra = "`mail`.`parent-uri`='".dbesc( $_GET["uri"] )  ."'";
		}
		elseif ($box=="all") {
			$sql_extra = "true";
		}
		elseif ($box=="inbox") {
			$sql_extra = "`mail`.`from-url`!='".dbesc( $profile_url )."'";
		}

		if ($max_id > 0)
			$sql_extra .= ' AND `mail`.`id` <= '.intval($max_id);

		if ($user_id !="") {
			$sql_extra .= ' AND `mail`.`contact-id` = ' . intval($user_id);
		}
		elseif($screen_name !=""){
			$sql_extra .= " AND `contact`.`nick` = '" . dbesc($screen_name). "'";
		}

		$r = q("SELECT `mail`.*, `contact`.`nurl` AS `contact-url` FROM `mail`,`contact` WHERE `mail`.`contact-id` = `contact`.`id` AND `mail`.`uid`=%d AND $sql_extra AND `mail`.`id` > %d ORDER BY `mail`.`id` DESC LIMIT %d,%d",
				intval(api_user()),
				intval($since_id),
				intval($start),	intval($count)
		);
		if ($verbose == "true") {
			// stop execution and return error message if no mails available
			if($r == null) {
				$answer = array('result' => 'error', 'message' => 'no mails available');
				return api_format_data("direct_messages_all", $type, array('$result' => $answer));
			}
		}

		$ret = Array();
		foreach($r as $item) {
			if ($box == "inbox" || $item['from-url'] != $profile_url){
				$recipient = $user_info;
				$sender = api_get_user($a,normalise_link($item['contact-url']));
			}
			elseif ($box == "sentbox" || $item['from-url'] == $profile_url){
				$recipient = api_get_user($a,normalise_link($item['contact-url']));
				$sender = $user_info;

			}
			$ret[]=api_format_messages($item, $recipient, $sender);
		}


		$data = array('direct_message' => $ret);
		switch($type){
			case "atom":
			case "rss":
				$data = api_rss_extra($a, $data, $user_info);
		}

		return  api_format_data("direct-messages", $type, $data);

	}

	function api_direct_messages_sentbox($type){
		$verbose = (x($_GET,'friendica_verbose')?strtolower($_GET['friendica_verbose']):"false");
		return api_direct_messages_box($type, "sentbox", $verbose);
	}
	function api_direct_messages_inbox($type){
		$verbose = (x($_GET,'friendica_verbose')?strtolower($_GET['friendica_verbose']):"false");
		return api_direct_messages_box($type, "inbox", $verbose);
	}
	function api_direct_messages_all($type){
		$verbose = (x($_GET,'friendica_verbose')?strtolower($_GET['friendica_verbose']):"false");
		return api_direct_messages_box($type, "all", $verbose);
	}
	function api_direct_messages_conversation($type){
		$verbose = (x($_GET,'friendica_verbose')?strtolower($_GET['friendica_verbose']):"false");
		return api_direct_messages_box($type, "conversation", $verbose);
	}
	api_register_func('api/direct_messages/conversation','api_direct_messages_conversation',true);
	api_register_func('api/direct_messages/all','api_direct_messages_all',true);
	api_register_func('api/direct_messages/sent','api_direct_messages_sentbox',true);
	api_register_func('api/direct_messages','api_direct_messages_inbox',true);



	function api_oauth_request_token($type){
		try{
			$oauth = new FKOAuth1();
			$r = $oauth->fetch_request_token(OAuthRequest::from_request());
		}catch(Exception $e){
			echo "error=". OAuthUtil::urlencode_rfc3986($e->getMessage()); killme();
		}
		echo $r;
		killme();
	}
	function api_oauth_access_token($type){
		try{
			$oauth = new FKOAuth1();
			$r = $oauth->fetch_access_token(OAuthRequest::from_request());
		}catch(Exception $e){
			echo "error=". OAuthUtil::urlencode_rfc3986($e->getMessage()); killme();
		}
		echo $r;
		killme();
	}

	api_register_func('api/oauth/request_token', 'api_oauth_request_token', false);
	api_register_func('api/oauth/access_token', 'api_oauth_access_token', false);


	function api_fr_photos_list($type) {
		if (api_user()===false) throw new ForbiddenException();
		$r = q("select `resource-id`, max(scale) as scale, album, filename, type from photo
				where uid = %d and album != 'Contact Photos' group by `resource-id`",
			intval(local_user())
		);
		$typetoext = array(
		'image/jpeg' => 'jpg',
		'image/png' => 'png',
		'image/gif' => 'gif'
		);
		$data = array('photo'=>array());
		if ($r) {
			foreach ($r as $rr) {
				$photo = array();
				$photo['id'] = $rr['resource-id'];
				$photo['album'] = $rr['album'];
				$photo['filename'] = $rr['filename'];
				$photo['type'] = $rr['type'];
				$thumb = App::get_baseurl()."/photo/".$rr['resource-id']."-".$rr['scale'].".".$typetoext[$rr['type']];

				if ($type == "xml")
					$data['photo'][] = array("@attributes" => $photo, "1" => $thumb);
				else {
					$photo['thumb'] = $thumb;
					$data['photo'][] = $photo;
				}
			}
		}
		return  api_format_data("photos", $type, $data);
	}

	function api_fr_photo_detail($type) {
		if (api_user()===false) throw new ForbiddenException();
		if(!x($_REQUEST,'photo_id')) throw new BadRequestException("No photo id.");

		$scale = (x($_REQUEST, 'scale') ? intval($_REQUEST['scale']) : false);
		$scale_sql = ($scale === false ? "" : sprintf("and scale=%d",intval($scale)));
		$data_sql = ($scale === false ? "" : "data, ");

		$r = q("select %s `resource-id`, `created`, `edited`, `title`, `desc`, `album`, `filename`,
						`type`, `height`, `width`, `datasize`, `profile`, min(`scale`) as minscale, max(`scale`) as maxscale
				from photo where `uid` = %d and `resource-id` = '%s' %s group by `resource-id`",
			$data_sql,
			intval(local_user()),
			dbesc($_REQUEST['photo_id']),
			$scale_sql
		);

		$typetoext = array(
		'image/jpeg' => 'jpg',
		'image/png' => 'png',
		'image/gif' => 'gif'
		);

		if ($r) {
			$data = array('photo' => $r[0]);
			$data['photo']['id'] = $data['photo']['resource-id'];
			if ($scale !== false) {
				$data['photo']['data'] = base64_encode($data['photo']['data']);
			} else {
				unset($data['photo']['datasize']); //needed only with scale param
			}
			if ($type == "xml") {
				$data['photo']['links'] = array();
				for ($k=intval($data['photo']['minscale']); $k<=intval($data['photo']['maxscale']); $k++)
					$data['photo']['links'][$k.":link"]["@attributes"] = array("type" => $data['photo']['type'],
											"scale" => $k,
											"href" => App::get_baseurl()."/photo/".$data['photo']['resource-id']."-".$k.".".$typetoext[$data['photo']['type']]);
			} else {
				$data['photo']['link'] = array();
				for ($k=intval($data['photo']['minscale']); $k<=intval($data['photo']['maxscale']); $k++) {
					$data['photo']['link'][$k] = App::get_baseurl()."/photo/".$data['photo']['resource-id']."-".$k.".".$typetoext[$data['photo']['type']];
				}
			}
			unset($data['photo']['resource-id']);
			unset($data['photo']['minscale']);
			unset($data['photo']['maxscale']);

		} else {
			throw new NotFoundException();
		}

		return api_format_data("photo_detail", $type, $data);
	}

	api_register_func('api/friendica/photos/list', 'api_fr_photos_list', true);
	api_register_func('api/friendica/photo', 'api_fr_photo_detail', true);



	/**
	 * similar as /mod/redir.php
	 * redirect to 'url' after dfrn auth
	 *
	 * why this when there is mod/redir.php already?
	 * This use api_user() and api_login()
	 *
	 * params
	 * 		c_url: url of remote contact to auth to
	 * 		url: string, url to redirect after auth
	 */
	function api_friendica_remoteauth() {
		$url = ((x($_GET,'url')) ? $_GET['url'] : '');
		$c_url = ((x($_GET,'c_url')) ? $_GET['c_url'] : '');

		if ($url === '' || $c_url === '')
			throw new BadRequestException("Wrong parameters.");

		$c_url = normalise_link($c_url);

		// traditional DFRN

		$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `nurl` = '%s' LIMIT 1",
			dbesc($c_url),
			intval(api_user())
		);

		if ((! dbm::is_result($r)) || ($r[0]['network'] !== NETWORK_DFRN))
			throw new BadRequestException("Unknown contact");

		$cid = $r[0]['id'];

		$dfrn_id = $orig_id = (($r[0]['issued-id']) ? $r[0]['issued-id'] : $r[0]['dfrn-id']);

		if($r[0]['duplex'] && $r[0]['issued-id']) {
			$orig_id = $r[0]['issued-id'];
			$dfrn_id = '1:' . $orig_id;
		}
		if($r[0]['duplex'] && $r[0]['dfrn-id']) {
			$orig_id = $r[0]['dfrn-id'];
			$dfrn_id = '0:' . $orig_id;
		}

		$sec = random_string();

		q("INSERT INTO `profile_check` ( `uid`, `cid`, `dfrn_id`, `sec`, `expire`)
			VALUES( %d, %s, '%s', '%s', %d )",
			intval(api_user()),
			intval($cid),
			dbesc($dfrn_id),
			dbesc($sec),
			intval(time() + 45)
		);

		logger($r[0]['name'] . ' ' . $sec, LOGGER_DEBUG);
		$dest = (($url) ? '&destination_url=' . $url : '');
		goaway ($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
				. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
				. '&type=profile&sec=' . $sec . $dest . $quiet );
	}
	api_register_func('api/friendica/remoteauth', 'api_friendica_remoteauth', true);

	/**
	 * @brief Return the item shared, if the item contains only the [share] tag
	 *
	 * @param array $item Sharer item
	 * @return array Shared item or false if not a reshare
	 */
	function api_share_as_retweet(&$item) {
		$body = trim($item["body"]);

		if (Diaspora::is_reshare($body, false)===false) {
			return false;
		}

		$attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
		// Skip if there is no shared message in there
		// we already checked this in diaspora::is_reshare()
		// but better one more than one less...
		if ($body == $attributes)
			return false;


		// build the fake reshared item
		$reshared_item = $item;

		$author = "";
		preg_match("/author='(.*?)'/ism", $attributes, $matches);
		if ($matches[1] != "")
			$author = html_entity_decode($matches[1],ENT_QUOTES,'UTF-8');

		preg_match('/author="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$author = $matches[1];

		$profile = "";
		preg_match("/profile='(.*?)'/ism", $attributes, $matches);
		if ($matches[1] != "")
			$profile = $matches[1];

		preg_match('/profile="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$profile = $matches[1];

		$avatar = "";
		preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
		if ($matches[1] != "")
			$avatar = $matches[1];

		preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$avatar = $matches[1];

		$link = "";
		preg_match("/link='(.*?)'/ism", $attributes, $matches);
		if ($matches[1] != "")
			$link = $matches[1];

		preg_match('/link="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$link = $matches[1];

		$posted = "";
		preg_match("/posted='(.*?)'/ism", $attributes, $matches);
		if ($matches[1] != "")
			$posted= $matches[1];

		preg_match('/posted="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$posted = $matches[1];

		$shared_body = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$2",$body);

		if (($shared_body == "") || ($profile == "") || ($author == "") || ($avatar == "") || ($posted == ""))
			return false;



		$reshared_item["body"] = $shared_body;
		$reshared_item["author-name"] = $author;
		$reshared_item["author-link"] = $profile;
		$reshared_item["author-avatar"] = $avatar;
		$reshared_item["plink"] = $link;
		$reshared_item["created"] = $posted;
		$reshared_item["edited"] = $posted;

		return $reshared_item;

	}

	function api_get_nick($profile) {
		/* To-Do:
		 - remove trailing junk from profile url
		 - pump.io check has to check the website
		*/

		$nick = "";

		$r = q("SELECT `nick` FROM `contact` WHERE `uid` = 0 AND `nurl` = '%s'",
			dbesc(normalise_link($profile)));
		if ($r)
			$nick = $r[0]["nick"];

		if (!$nick == "") {
			$r = q("SELECT `nick` FROM `contact` WHERE `uid` = 0 AND `nurl` = '%s'",
				dbesc(normalise_link($profile)));
			if ($r)
				$nick = $r[0]["nick"];
		}

		if (!$nick == "") {
			$friendica = preg_replace("=https?://(.*)/profile/(.*)=ism", "$2", $profile);
			if ($friendica != $profile)
				$nick = $friendica;
		}

		if (!$nick == "") {
			$diaspora = preg_replace("=https?://(.*)/u/(.*)=ism", "$2", $profile);
			if ($diaspora != $profile)
				$nick = $diaspora;
		}

		if (!$nick == "") {
			$twitter = preg_replace("=https?://twitter.com/(.*)=ism", "$1", $profile);
			if ($twitter != $profile)
				$nick = $twitter;
		}


		if (!$nick == "") {
			$StatusnetHost = preg_replace("=https?://(.*)/user/(.*)=ism", "$1", $profile);
			if ($StatusnetHost != $profile) {
				$StatusnetUser = preg_replace("=https?://(.*)/user/(.*)=ism", "$2", $profile);
				if ($StatusnetUser != $profile) {
					$UserData = fetch_url("http://".$StatusnetHost."/api/users/show.json?user_id=".$StatusnetUser);
					$user = json_decode($UserData);
					if ($user)
						$nick = $user->screen_name;
				}
			}
		}

		// To-Do: look at the page if its really a pumpio site
		//if (!$nick == "") {
		//	$pumpio = preg_replace("=https?://(.*)/(.*)/=ism", "$2", $profile."/");
		//	if ($pumpio != $profile)
		//		$nick = $pumpio;
			//      <div class="media" id="profile-block" data-profile-id="acct:kabniel@microca.st">

		//}

		if ($nick != "")
			return($nick);

		return(false);
	}

	function api_in_reply_to($item) {
		$in_reply_to = array();

		$in_reply_to['status_id'] = NULL;
		$in_reply_to['user_id'] = NULL;
		$in_reply_to['status_id_str'] = NULL;
		$in_reply_to['user_id_str'] = NULL;
		$in_reply_to['screen_name'] = NULL;

		if (($item['thr-parent'] != $item['uri']) AND (intval($item['parent']) != intval($item['id']))) {
			$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' LIMIT 1",
				intval($item['uid']),
				dbesc($item['thr-parent']));

			if (dbm::is_result($r)) {
				$in_reply_to['status_id'] = intval($r[0]['id']);
			} else {
				$in_reply_to['status_id'] = intval($item['parent']);
			}

			$in_reply_to['status_id_str'] = (string) intval($in_reply_to['status_id']);

			$r = q("SELECT `contact`.`nick`, `contact`.`name`, `contact`.`id`, `contact`.`url` FROM item
				STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`author-id`
				WHERE `item`.`id` = %d LIMIT 1",
				intval($in_reply_to['status_id'])
			);

			if (dbm::is_result($r)) {
				if ($r[0]['nick'] == "") {
					$r[0]['nick'] = api_get_nick($r[0]["url"]);
				}

				$in_reply_to['screen_name'] = (($r[0]['nick']) ? $r[0]['nick'] : $r[0]['name']);
				$in_reply_to['user_id'] = intval($r[0]['id']);
				$in_reply_to['user_id_str'] = (string) intval($r[0]['id']);
			}

			// There seems to be situation, where both fields are identical:
			// https://github.com/friendica/friendica/issues/1010
			// This is a bugfix for that.
			if (intval($in_reply_to['status_id']) == intval($item['id'])) {
				logger('this message should never appear: id: '.$item['id'].' similar to reply-to: '.$in_reply_to['status_id'], LOGGER_DEBUG);
				$in_reply_to['status_id'] = NULL;
				$in_reply_to['user_id'] = NULL;
				$in_reply_to['status_id_str'] = NULL;
				$in_reply_to['user_id_str'] = NULL;
				$in_reply_to['screen_name'] = NULL;
			}
		}

		return $in_reply_to;
	}

	function api_clean_plain_items($Text) {
		$include_entities = strtolower(x($_REQUEST,'include_entities')?$_REQUEST['include_entities']:"false");

		$Text = bb_CleanPictureLinks($Text);
		$URLSearchString = "^\[\]";

		$Text = preg_replace("/([!#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",'$1$3',$Text);

		if ($include_entities == "true") {
			$Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",'[url=$1]$1[/url]',$Text);
		}

		// Simplify "attachment" element
		$Text = api_clean_attachments($Text);

		return($Text);
	}

	/**
	 * @brief Removes most sharing information for API text export
	 *
	 * @param string $body The original body
	 *
	 * @return string Cleaned body
	 */
	function api_clean_attachments($body) {
		$data = get_attachment_data($body);

		if (!$data)
			return $body;

		$body = "";

		if (isset($data["text"]))
			$body = $data["text"];

		if (($body == "") AND (isset($data["title"])))
			$body = $data["title"];

		if (isset($data["url"]))
			$body .= "\n".$data["url"];

		$body .= $data["after"];

		return $body;
	}

	function api_best_nickname(&$contacts) {
		$best_contact = array();

		if (count($contact) == 0)
			return;

		foreach ($contacts AS $contact)
			if ($contact["network"] == "") {
				$contact["network"] = "dfrn";
				$best_contact = array($contact);
			}

		if (sizeof($best_contact) == 0)
			foreach ($contacts AS $contact)
				if ($contact["network"] == "dfrn")
					$best_contact = array($contact);

		if (sizeof($best_contact) == 0)
			foreach ($contacts AS $contact)
				if ($contact["network"] == "dspr")
					$best_contact = array($contact);

		if (sizeof($best_contact) == 0)
			foreach ($contacts AS $contact)
				if ($contact["network"] == "stat")
					$best_contact = array($contact);

		if (sizeof($best_contact) == 0)
			foreach ($contacts AS $contact)
				if ($contact["network"] == "pump")
					$best_contact = array($contact);

		if (sizeof($best_contact) == 0)
			foreach ($contacts AS $contact)
				if ($contact["network"] == "twit")
					$best_contact = array($contact);

		if (sizeof($best_contact) == 1)
			$contacts = $best_contact;
		else
			$contacts = array($contacts[0]);
	}

	// return all or a specified group of the user with the containing contacts
	function api_friendica_group_show($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$gid = (x($_REQUEST,'gid') ? $_REQUEST['gid'] : 0);
		$uid = $user_info['uid'];

		// get data of the specified group id or all groups if not specified
		if ($gid != 0) {
			$r = q("SELECT * FROM `group` WHERE `deleted` = 0 AND `uid` = %d AND `id` = %d",
				intval($uid),
				intval($gid));
			// error message if specified gid is not in database
			if (!dbm::is_result($r))
				throw new BadRequestException("gid not available");
		}
		else
			$r = q("SELECT * FROM `group` WHERE `deleted` = 0 AND `uid` = %d",
				intval($uid));

		// loop through all groups and retrieve all members for adding data in the user array
		foreach ($r as $rr) {
			$members = group_get_members($rr['id']);
			$users = array();

			if ($type == "xml") {
				$user_element = "users";
				$k = 0;
				foreach ($members as $member) {
					$user = api_get_user($a, $member['nurl']);
					$users[$k++.":user"] = $user;
				}
			} else {
				$user_element = "user";
				foreach ($members as $member) {
					$user = api_get_user($a, $member['nurl']);
					$users[] = $user;
				}
			}
			$grps[] = array('name' => $rr['name'], 'gid' => $rr['id'], $user_element => $users);
		}
		return api_format_data("groups", $type, array('group' => $grps));
	}
	api_register_func('api/friendica/group_show', 'api_friendica_group_show', true);


	// delete the specified group of the user
	function api_friendica_group_delete($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$gid = (x($_REQUEST,'gid') ? $_REQUEST['gid'] : 0);
		$name = (x($_REQUEST, 'name') ? $_REQUEST['name'] : "");
		$uid = $user_info['uid'];

		// error if no gid specified
		if ($gid == 0 || $name == "")
			throw new BadRequestException('gid or name not specified');

		// get data of the specified group id
		$r = q("SELECT * FROM `group` WHERE `uid` = %d AND `id` = %d",
			intval($uid),
			intval($gid));
		// error message if specified gid is not in database
		if (!dbm::is_result($r))
			throw new BadRequestException('gid not available');

		// get data of the specified group id and group name
		$rname = q("SELECT * FROM `group` WHERE `uid` = %d AND `id` = %d AND `name` = '%s'",
			intval($uid),
			intval($gid),
			dbesc($name));
		// error message if specified gid is not in database
		if (!dbm::is_result($rname))
			throw new BadRequestException('wrong group name');

		// delete group
		$ret = group_rmv($uid, $name);
		if ($ret) {
			// return success
			$success = array('success' => $ret, 'gid' => $gid, 'name' => $name, 'status' => 'deleted', 'wrong users' => array());
			return api_format_data("group_delete", $type, array('result' => $success));
		}
		else
			throw new BadRequestException('other API error');
	}
	api_register_func('api/friendica/group_delete', 'api_friendica_group_delete', true, API_METHOD_DELETE);


	// create the specified group with the posted array of contacts
	function api_friendica_group_create($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$name = (x($_REQUEST, 'name') ? $_REQUEST['name'] : "");
		$uid = $user_info['uid'];
		$json = json_decode($_POST['json'], true);
		$users = $json['user'];

		// error if no name specified
		if ($name == "")
			throw new BadRequestException('group name not specified');

		// get data of the specified group name
		$rname = q("SELECT * FROM `group` WHERE `uid` = %d AND `name` = '%s' AND `deleted` = 0",
			intval($uid),
			dbesc($name));
		// error message if specified group name already exists
		if (dbm::is_result($rname))
			throw new BadRequestException('group name already exists');

		// check if specified group name is a deleted group
		$rname = q("SELECT * FROM `group` WHERE `uid` = %d AND `name` = '%s' AND `deleted` = 1",
			intval($uid),
			dbesc($name));
		// error message if specified group name already exists
		if (dbm::is_result($rname))
			$reactivate_group = true;

		// create group
		$ret = group_add($uid, $name);
		if ($ret)
			$gid = group_byname($uid, $name);
		else
			throw new BadRequestException('other API error');

		// add members
		$erroraddinguser = false;
		$errorusers = array();
		foreach ($users as $user) {
			$cid = $user['cid'];
			// check if user really exists as contact
			$contact = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d",
				intval($cid),
				intval($uid));
			if (count($contact))
				$result = group_add_member($uid, $name, $cid, $gid);
			else {
				$erroraddinguser = true;
				$errorusers[] = $cid;
			}
		}

		// return success message incl. missing users in array
		$status = ($erroraddinguser ? "missing user" : ($reactivate_group ? "reactivated" : "ok"));
		$success = array('success' => true, 'gid' => $gid, 'name' => $name, 'status' => $status, 'wrong users' => $errorusers);
		return api_format_data("group_create", $type, array('result' => $success));
	}
	api_register_func('api/friendica/group_create', 'api_friendica_group_create', true, API_METHOD_POST);


	// update the specified group with the posted array of contacts
	function api_friendica_group_update($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$uid = $user_info['uid'];
		$gid = (x($_REQUEST, 'gid') ? $_REQUEST['gid'] : 0);
		$name = (x($_REQUEST, 'name') ? $_REQUEST['name'] : "");
		$json = json_decode($_POST['json'], true);
		$users = $json['user'];

		// error if no name specified
		if ($name == "")
			throw new BadRequestException('group name not specified');

		// error if no gid specified
		if ($gid == "")
			throw new BadRequestException('gid not specified');

		// remove members
		$members = group_get_members($gid);
		foreach ($members as $member) {
			$cid = $member['id'];
			foreach ($users as $user) {
				$found = ($user['cid'] == $cid ? true : false);
			}
			if (!$found) {
				$ret = group_rmv_member($uid, $name, $cid);
			}
		}

		// add members
		$erroraddinguser = false;
		$errorusers = array();
		foreach ($users as $user) {
			$cid = $user['cid'];
			// check if user really exists as contact
			$contact = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d",
				intval($cid),
				intval($uid));
			if (count($contact))
				$result = group_add_member($uid, $name, $cid, $gid);
			else {
				$erroraddinguser = true;
				$errorusers[] = $cid;
			}
		}

		// return success message incl. missing users in array
		$status = ($erroraddinguser ? "missing user" : "ok");
		$success = array('success' => true, 'gid' => $gid, 'name' => $name, 'status' => $status, 'wrong users' => $errorusers);
		return api_format_data("group_update", $type, array('result' => $success));
	}
	api_register_func('api/friendica/group_update', 'api_friendica_group_update', true, API_METHOD_POST);


	function api_friendica_activity($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();
		$verb = strtolower($a->argv[3]);
		$verb = preg_replace("|\..*$|", "", $verb);

		$id = (x($_REQUEST, 'id') ? $_REQUEST['id'] : 0);

		$res = do_like($id, $verb);

		if ($res) {
			if ($type == "xml")
				$ok = "true";
			else
				$ok = "ok";
			return api_format_data('ok', $type, array('ok' => $ok));
		} else {
			throw new BadRequestException('Error adding activity');
		}

	}
	api_register_func('api/friendica/activity/like', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/dislike', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/attendyes', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/attendno', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/attendmaybe', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/unlike', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/undislike', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/unattendyes', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/unattendno', 'api_friendica_activity', true, API_METHOD_POST);
	api_register_func('api/friendica/activity/unattendmaybe', 'api_friendica_activity', true, API_METHOD_POST);

	/**
	 * @brief Returns notifications
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	*/
	function api_friendica_notification($type) {

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();
		if ($a->argc!==3) throw new BadRequestException("Invalid argument count");
		$nm = new NotificationsManager();

		$notes = $nm->getAll(array(), "+seen -date", 50);

		if ($type == "xml") {
			$xmlnotes = array();
			foreach ($notes AS $note)
				$xmlnotes[] = array("@attributes" => $note);

			$notes = $xmlnotes;
		}

		return api_format_data("notes", $type, array('note' => $notes));
	}

	/**
	 * @brief Set notification as seen and returns associated item (if possible)
	 *
	 * POST request with 'id' param as notification id
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_friendica_notification_seen($type){

		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();
		if ($a->argc!==4) throw new BadRequestException("Invalid argument count");

		$id = (x($_REQUEST, 'id') ? intval($_REQUEST['id']) : 0);

		$nm = new NotificationsManager();
		$note = $nm->getByID($id);
		if (is_null($note)) throw new BadRequestException("Invalid argument");

		$nm->setSeen($note);
		if ($note['otype']=='item') {
			// would be really better with an ItemsManager and $im->getByID() :-P
			$r = q("SELECT * FROM `item` WHERE `id`=%d AND `uid`=%d",
				intval($note['iid']),
				intval(local_user())
			);
			if ($r!==false) {
				// we found the item, return it to the user
				$user_info = api_get_user($a);
				$ret = api_format_items($r,$user_info, false, $type);
				$data = array('status' => $ret);
				return api_format_data("status", $type, $data);
			}
			// the item can't be found, but we set the note as seen, so we count this as a success
		}
		return api_format_data('result', $type, array('result' => "success"));
	}

	api_register_func('api/friendica/notification/seen', 'api_friendica_notification_seen', true, API_METHOD_POST);
	api_register_func('api/friendica/notification', 'api_friendica_notification', true, API_METHOD_GET);


	/**
	 * @brief update a direct_message to seen state
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string (success result=ok, error result=error with error message)
	 */
	function api_friendica_direct_messages_setseen($type){
		$a = get_app();
		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$uid = $user_info['uid'];
		$id = (x($_REQUEST, 'id') ? $_REQUEST['id'] : 0);

		// return error if id is zero
		if ($id == "") {
			$answer = array('result' => 'error', 'message' => 'message id not specified');
			return api_format_data("direct_messages_setseen", $type, array('$result' => $answer));
		}

		// get data of the specified message id
		$r = q("SELECT `id` FROM `mail` WHERE `id` = %d AND `uid` = %d",
			intval($id), 
			intval($uid));
		// error message if specified id is not in database
		if (!dbm::is_result($r)) {
			$answer = array('result' => 'error', 'message' => 'message id not in database');
			return api_format_data("direct_messages_setseen", $type, array('$result' => $answer));
		}

		// update seen indicator
		$result = q("UPDATE `mail` SET `seen` = 1 WHERE `id` = %d AND `uid` = %d", 
			intval($id), 
			intval($uid));

		if ($result) {
			// return success
			$answer = array('result' => 'ok', 'message' => 'message set to seen');
			return api_format_data("direct_message_setseen", $type, array('$result' => $answer));
		} else {
			$answer = array('result' => 'error', 'message' => 'unknown error');
			return api_format_data("direct_messages_setseen", $type, array('$result' => $answer));
		}
	}
	api_register_func('api/friendica/direct_messages_setseen', 'api_friendica_direct_messages_setseen', true);




	/**
	 * @brief search for direct_messages containing a searchstring through api
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string (success: success=true if found and search_result contains found messages
	 *                          success=false if nothing was found, search_result='nothing found',
	 * 		   error: result=error with error message)
	 */
	function api_friendica_direct_messages_search($type){
		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// params
		$user_info = api_get_user($a);
		$searchstring = (x($_REQUEST,'searchstring') ? $_REQUEST['searchstring'] : "");
		$uid = $user_info['uid'];

		// error if no searchstring specified
		if ($searchstring == "") {
			$answer = array('result' => 'error', 'message' => 'searchstring not specified');
			return api_format_data("direct_messages_search", $type, array('$result' => $answer));
		}

		// get data for the specified searchstring
		$r = q("SELECT `mail`.*, `contact`.`nurl` AS `contact-url` FROM `mail`,`contact` WHERE `mail`.`contact-id` = `contact`.`id` AND `mail`.`uid`=%d AND `body` LIKE '%s' ORDER BY `mail`.`id` DESC",
			intval($uid),
			dbesc('%'.$searchstring.'%')
		);

		$profile_url = $user_info["url"];
		// message if nothing was found
		if (!dbm::is_result($r))
			$success = array('success' => false, 'search_results' => 'problem with query');
		else if (count($r) == 0) 
			$success = array('success' => false, 'search_results' => 'nothing found');
		else {
			$ret = Array();
			foreach($r as $item) {
				if ($box == "inbox" || $item['from-url'] != $profile_url){
					$recipient = $user_info;
					$sender = api_get_user($a,normalise_link($item['contact-url']));
				}
				elseif ($box == "sentbox" || $item['from-url'] == $profile_url){
					$recipient = api_get_user($a,normalise_link($item['contact-url']));
					$sender = $user_info;
				}
				$ret[]=api_format_messages($item, $recipient, $sender);
			}
			$success = array('success' => true, 'search_results' => $ret);
		}

		return api_format_data("direct_message_search", $type, array('$result' => $success));
	}
	api_register_func('api/friendica/direct_messages_search', 'api_friendica_direct_messages_search', true);

	/**
	 * @brief return data of all the profiles a user has to the client
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_friendica_profile_show($type){
		$a = get_app();

		if (api_user()===false) throw new ForbiddenException();

		// input params
		$profileid = (x($_REQUEST,'profile_id') ? $_REQUEST['profile_id'] : 0);

		// retrieve general information about profiles for user
		$multi_profiles = feature_enabled(api_user(),'multi_profiles');
		$directory = get_config('system', 'directory');

// get data of the specified profile id or all profiles of the user if not specified
		if ($profileid != 0) {
			$r = q("SELECT * FROM `profile` WHERE `uid` = %d AND `id` = %d",
				intval(api_user()),
				intval($profileid));
			// error message if specified gid is not in database
			if (!dbm::is_result($r))
				throw new BadRequestException("profile_id not available");
		}
		else
			$r = q("SELECT * FROM `profile` WHERE `uid` = %d",
				intval(api_user()));

		// loop through all returned profiles and retrieve data and users
		$k = 0;
		foreach ($r as $rr) {
			$profile = api_format_items_profiles($rr, $type);

			// select all users from contact table, loop and prepare standard return for user data
			$users = array();
			$r = q("SELECT `id`, `nurl` FROM `contact` WHERE `uid`= %d AND `profile-id` = %d",
				intval(api_user()),
				intval($rr['profile_id']));

			foreach ($r as $rr) {
				$user = api_get_user($a, $rr['nurl']);
				($type == "xml") ? $users[$k++.":user"] = $user : $users[] = $user;
			}
			$profile['users'] = $users;

			// add prepared profile data to array for final return
			if ($type == "xml") {
				$profiles[$k++.":profile"] = $profile;
			} else {
				$profiles[] = $profile;
			}
		}

		// return settings, authenticated user and profiles data
		$result = array('multi_profiles' => $multi_profiles ? true : false,
						'global_dir' => $directory,
						'friendica_owner' => api_get_user($a, intval(api_user())),
						'profiles' => $profiles);
		return api_format_data("friendica_profiles", $type, array('$result' => $result));
	}
	api_register_func('api/friendica/profile/show', 'api_friendica_profile_show', true, API_METHOD_GET);

/*
To.Do:
    [pagename] => api/1.1/statuses/lookup.json
    [id] => 605138389168451584
    [include_cards] => true
    [cards_platform] => Android-12
    [include_entities] => true
    [include_my_retweet] => 1
    [include_rts] => 1
    [include_reply_count] => true
    [include_descendent_reply_count] => true
(?)


Not implemented by now:
statuses/retweets_of_me
friendships/create
friendships/destroy
friendships/exists
friendships/show
account/update_location
account/update_profile_background_image
account/update_profile_image
blocks/create
blocks/destroy
friendica/profile/update
friendica/profile/create
friendica/profile/delete

Not implemented in status.net:
statuses/retweeted_to_me
statuses/retweeted_by_me
direct_messages/destroy
account/end_session
account/update_delivery_device
notifications/follow
notifications/leave
blocks/exists
blocks/blocking
lists
*/