friendica_2021.01_tupambae_shared_hosting/include/api.php

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

use \Friendica\Core\Config;

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;

/// @TODO Fix intending
	/**
	 * @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 (x($_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 (strpos($_SERVER['HTTP_USER_AGENT'], "Twidere") !== false) {
			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 (!x($_SERVER, 'PHP_AUTH_USER')) {
			logger('API_login: ' . print_r($_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']);

					/// @TODO should be "true ==[=] $info['auth']", if you miss only one = character, you assign a variable (only with ==). Let's make all this even.
					if ($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"];

						/// @TODO round() really everywhere?
						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 (false === $r) {
						/*
						 * 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 (x($_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;
					}
				}
			}

			logger('API call not implemented: ' . $a->query_string);
			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
	 * @todo find proper type-hints
	 */
	function api_rss_extra(App $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));

		return (dbm::is_result($r) && $r[0]["url"]);
	}

	/**
	 * @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(App $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 (!dbm::is_result($uinfo)) {
			$r = array();

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

			if (dbm::is_result($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())
			);

			/// @TODO old-lost code? (twice)
			// 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;
		}

		/// @TODO old-lost code? (twice)
/*
		// Counting is deactivated by now, due to performance issues
		// count friends
		$r = q("SELECT count(*) as `count` FROM `contact`
				WHERE  `uid` = %d AND `rel` IN ( %d, %d )
				AND `self`=0 AND NOT `blocked` AND NOT `pending` AND `hidden`=0",
				intval($uinfo[0]['uid']),
				intval(CONTACT_IS_SHARING),
				intval(CONTACT_IS_FRIEND)
		);
		$countfriends = $r[0]['count'];

		$r = q("SELECT count(*) as `count` FROM `contact`
				WHERE  `uid` = %d AND `rel` IN ( %d, %d )
				AND `self`=0 AND NOT `blocked` AND NOT `pending` AND `hidden`=0",
				intval($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,
			/// @TODO old way?
			//'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(App $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"]);

		if ($item['thr-parent'] == $item['uri']) {
			$owner_user = api_get_user($a, $item["owner-link"]);
		} else {
			$owner_user = $status_user;
		}

		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);
		}
		/// @TODO old-lost code?
		//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));

	}

	/// @TODO move to top of file or somwhere better
	api_register_func('api/account/verify_credentials','api_account_verify_credentials', true);

	/**
	 * get data from $_POST or $_GET
	 */
	function requestdata($k) {
		if (x($_POST, $k)) {
			return $_POST[$k];
		}
		if (x($_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;
		$txt = requestdata('status');
		/// @TODO old-lost code?
		//$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?

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

	/// @TODO move this to top of file or somewhere better!
	api_register_func('api/statuses/mediap','api_statuses_mediap', true, API_METHOD_POST);

	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 (dbm::is_result($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 (dbm::is_result($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 (dbm::is_result($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')) {
			$r = q("SELECT `resource-id`, `scale`, `nickname`, `type` FROM `photo` INNER JOIN `user` ON `user`.`uid` = `photo`.`uid` WHERE `resource-id` IN (SELECT `resource-id` FROM `photo` WHERE `id` = %d) AND `scale` > 0 AND `photo`.`uid` = %d ORDER BY `photo`.`width` DESC LIMIT 1",
				intval(requestdata('media_ids')), api_user());
			if (dbm::is_result($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);
	}

	/// @TODO move to top of file or somwhere better
	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);
	}

	/// @TODO move to top of file or somwhere better
	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 (dbm::is_result($lastwall)) {
			$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 (dbm::is_result($lastwall)) {
			$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));

	}

	/// @TODO move to top of file or somewhere better
	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 (x($_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);
	}

	/// @TODO move to top of file or somewhere better
	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);
	}

	/// @TODO move to top of file or somewhere better
	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);
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/statuses/public_timeline','api_statuses_public_timeline', true);

	/**
	 * @TODO nothing to say?
	 */
	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)
		);

		/// @TODO How about copying this to above methods which don't check $r ?
		if (!dbm::is_result($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);
		}
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/statuses/show','api_statuses_show', true);

	/**
	 * @TODO nothing to say?
	 */
	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 (dbm::is_result($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 (!dbm::is_result($r)) {
			throw new BadRequestException("There is no status with this id.");
		}

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

		$data = array('status' => $ret);
		return api_format_data("statuses", $type, $data);
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/conversation/show','api_conversation_show', true);
	api_register_func('api/statusnet/conversation','api_conversation_show', true);

	/**
	 * @TODO nothing to say?
	 */
	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)
		);

		/// @TODO other style than above functions!
		if (dbm::is_result($r) && $r[0]['body'] != "") {
			if (strpos($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;
			$_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);
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/statuses/retweet','api_statuses_repeat', true, API_METHOD_POST);

	/**
	 * @TODO nothing to say?
	 */
	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;
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/statuses/destroy','api_statuses_destroy', true, API_METHOD_DELETE);

	/**
	 * @TODO Nothing more than an URL to say?
	 * 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);
	}

	/// @TODO move to top of file or somewhere better
	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);
				break;
		}

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

	/// @TODO move to top of file or somwhere better
	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 {
			///  @TODO use x() to check if _REQUEST contains 'id'
			$itemid = intval($_REQUEST['id']);
		}

		$item = q("SELECT * FROM `item` WHERE `id`=%d AND `uid`=%d LIMIT 1",
				$itemid, api_user());

		if (!dbm::is_result($item) || count($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 new 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);
	}

	/// @TODO move to top of file or somwhere better
	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);
	}

	/// @TODO move to top of file or somwhere better
	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 (x($_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") {

		$a = get_app();

		$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'], $user_info['url']);
			} elseif (($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' => '150',
					'@attributes' => array("type" => "integer"),
					'hourly-limit' => '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' => '150',
					'hourly_limit' => '150',
					'reset_time' => api_date(datetime_convert('UTC', 'UTC','now + 1 hour',ATOM_TIME)),
				);
		}

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

	/// @TODO move to top of file or somwhere better
	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));
	}

	/// @TODO move to top of file or somwhere better
	api_register_func('api/help/test','api_help_test', false);

	function api_lists($type) {
		$ret = array();
		/// @TODO $ret is not filled here?
		return api_format_data('lists', $type, array("lists_list" => $ret));
	}

	/// @TODO move to top of file or somwhere better
	api_register_func('api/lists','api_lists',true);

	function api_lists_list($type) {
		$ret = array();
		/// @TODO $ret is not filled here?
		return api_format_data('lists', $type, array("lists_list" => $ret));
	}

	/// @TODO move to top of file or somwhere better
	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);
	}

	/// @TODO move to top of file or somewhere better
	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 = ((Config::get('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 = ((Config::get('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));

	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/gnusocial/config','api_statusnet_config', false);
	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));
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/gnusocial/version','api_statusnet_version', false);
	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');
	}

	/// @TODO move to top of file or somewhere better
	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);

	}

	/// @TODO move to top of file or somewhere better
	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" && ($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

	}

	/// @TODO move to top of file or somewhere better
	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 ($verbose == "true" && !dbm::is_result($r)) {
			$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);
	}

	/// @TODO move to top of file or somewhere better
	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();
	}

	/// @TODO move to top of file or somewhere better
	api_register_func('api/oauth/request_token', 'api_oauth_request_token', false);
	api_register_func('api/oauth/access_token', 'api_oauth_access_token', false);


	/**
	 * @brief delete a complete photoalbum with all containing photos from database through api
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photoalbum_delete($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		// input params
		$album = (x($_REQUEST,'album') ? $_REQUEST['album'] : "");

		// we do not allow calls without album string
		if ($album == "") {
			throw new BadRequestException("no albumname specified");
		}
		// check if album is existing
		$r = q("SELECT DISTINCT `resource-id` FROM `photo` WHERE `uid` = %d AND `album` = '%s'",
				intval(api_user()),
				dbesc($album));
		if (!dbm::is_result($r))
			throw new BadRequestException("album not available");

		// function for setting the items to "deleted = 1" which ensures that comments, likes etc. are not shown anymore
		// to the user and the contacts of the users (drop_items() performs the federation of the deletion to other networks
		foreach ($r as $rr) {
			$photo_item = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `resource-id` = '%s' AND `type` = 'photo'",
						intval(local_user()),
						dbesc($rr['resource-id'])
						);

			if (!dbm::is_result($photo_item)) {
				throw new InternalServerErrorException("problem with deleting items occured");
			}
			drop_item($photo_item[0]['id'],false);
		}

		// now let's delete all photos from the album
		$result = q("DELETE FROM `photo` WHERE `uid` = %d AND `album` = '%s'",
				intval(api_user()),
				dbesc($album));

		// return success of deletion or error message
		if ($result) {
			$answer = array('result' => 'deleted', 'message' => 'album `' . $album . '` with all containing photos has been deleted.');
			return api_format_data("photoalbum_delete", $type, array('$result' => $answer));
		} else {
			throw new InternalServerErrorException("unknown error - deleting from database failed");
		}

	}

	/**
	 * @brief update the name of the album for all photos of an album
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photoalbum_update($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		// input params
		$album = (x($_REQUEST,'album') ? $_REQUEST['album'] : "");
		$album_new = (x($_REQUEST,'album_new') ? $_REQUEST['album_new'] : "");

		// we do not allow calls without album string
		if ($album == "") {
			throw new BadRequestException("no albumname specified");
		}
		if ($album_new == "") {
			throw new BadRequestException("no new albumname specified");
		}
		// check if album is existing
		$r = q("SELECT * FROM `photo` WHERE `uid` = %d AND `album` = '%s'",
				intval(api_user()),
				dbesc($album));
		if (!dbm::is_result($r)) {
			throw new BadRequestException("album not available");
		}
		// now let's update all photos to the albumname
		$result = q("UPDATE `photo` SET `album` = '%s' WHERE `uid` = %d AND `album` = '%s'",
				dbesc($album_new),
				intval(api_user()),
				dbesc($album));

		// return success of updating or error message
		if ($result) {
			$answer = array('result' => 'updated', 'message' => 'album `' . $album . '` with all containing photos has been renamed to `' . $album_new . '`.');
			return api_format_data("photoalbum_update", $type, array('$result' => $answer));
		} else {
			throw new InternalServerErrorException("unknown error - updating in database failed");
		}
	}


	/**
	 * @brief list all photos of the authenticated user
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photos_list($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		$r = q("SELECT `resource-id`, MAX(scale) AS `scale`, `album`, `filename`, `type`, MAX(`created`) AS `created`,
				MAX(`edited`) AS `edited`, MAX(`desc`) AS `desc` 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'
		);
		$data = array('photo'=>array());
		if (dbm::is_result($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']];
				$photo['created'] = $rr['created'];
				$photo['edited'] = $rr['edited'];
				$photo['desc'] = $rr['desc'];

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

	/**
	 * @brief upload a new photo or change an existing photo
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photo_create_update($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		// input params
		$photo_id = (x($_REQUEST, 'photo_id') ? $_REQUEST['photo_id'] : null);
		$desc = (x($_REQUEST, 'desc') ? $_REQUEST['desc'] : (array_key_exists('desc', $_REQUEST) ? "" : null)); // extra check necessary to distinguish between 'not provided' and 'empty string'
		$album = (x($_REQUEST,'album') ? $_REQUEST['album'] : null);
		$album_new = (x($_REQUEST,'album_new') ? $_REQUEST['album_new'] : null);
		$allow_cid = (x($_REQUEST, 'allow_cid') ? $_REQUEST['allow_cid'] : (array_key_exists('allow_cid', $_REQUEST) ? " " : null));
		$deny_cid = (x($_REQUEST, 'deny_cid') ? $_REQUEST['deny_cid'] : (array_key_exists('deny_cid', $_REQUEST) ? " " : null));
		$allow_gid = (x($_REQUEST, 'allow_gid') ? $_REQUEST['allow_gid'] : (array_key_exists('allow_gid', $_REQUEST) ? " " : null));
		$deny_gid = (x($_REQUEST, 'deny_gid') ? $_REQUEST['deny_gid'] : (array_key_exists('deny_gid', $_REQUEST) ? " " : null));
		$visibility = (x($_REQUEST, 'visibility') ? (($_REQUEST['visibility'] == "true" || $_REQUEST['visibility'] == 1) ? true : false) : false);

		// do several checks on input parameters
		// we do not allow calls without album string
		if ($album == null) {
			throw new BadRequestException("no albumname specified");
		}
		// if photo_id == null --> we are uploading a new photo
		if ($photo_id == null) {
			$mode = "create";

			// error if no media posted in create-mode
			if (!x($_FILES,'media')) {
				// Output error
				throw new BadRequestException("no media data submitted");
			}

			// album_new will be ignored in create-mode
			$album_new = "";
		} else {
			$mode = "update";

			// check if photo is existing in database
			$r = q("SELECT * FROM `photo` WHERE `uid` = %d AND `resource-id` = '%s' AND `album` = '%s'",
					intval(api_user()),
					dbesc($photo_id),
					dbesc($album));
			if (!dbm::is_result($r)) {
				throw new BadRequestException("photo not available");
			}
		}

		// checks on acl strings provided by clients
		$acl_input_error = false;
		$acl_input_error |= check_acl_input($allow_cid);
		$acl_input_error |= check_acl_input($deny_cid);
		$acl_input_error |= check_acl_input($allow_gid);
		$acl_input_error |= check_acl_input($deny_gid);
		if ($acl_input_error) {
			throw new BadRequestException("acl data invalid");
		}
		// now let's upload the new media in create-mode
		if ($mode == "create") {
			$media = $_FILES['media'];
			$data = save_media_to_database("photo", $media, $type, $album, trim($allow_cid), trim($deny_cid), trim($allow_gid), trim($deny_gid), $desc, $visibility);

			// return success of updating or error message
			if (!is_null($data)) {
				return api_format_data("photo_create", $type, $data);
			} else {
				throw new InternalServerErrorException("unknown error - uploading photo failed, see Friendica log for more information");
			}
		}

		// now let's do the changes in update-mode
		if ($mode == "update") {
			$sql_extra = "";

			if (!is_null($desc)) {
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`desc` = '$desc'";
			}

			if (!is_null($album_new)) {
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`album` = '$album_new'";
			}

			if (!is_null($allow_cid)) {
				$allow_cid = trim($allow_cid);
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`allow_cid` = '$allow_cid'";
			}

			if (!is_null($deny_cid)) {
				$deny_cid = trim($deny_cid);
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`deny_cid` = '$deny_cid'";
			}

			if (!is_null($allow_gid)) {
				$allow_gid = trim($allow_gid);
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`allow_gid` = '$allow_gid'";
			}

			if (!is_null($deny_gid)) {
				$deny_gid = trim($deny_gid);
				$sql_extra .= (($sql_extra != "") ? " ," : "") . "`deny_gid` = '$deny_gid'";
			}

			$result = false;
			if ($sql_extra != "") {
				$nothingtodo = false;
				$result = q("UPDATE `photo` SET %s, `edited`='%s' WHERE `uid` = %d AND `resource-id` = '%s' AND `album` = '%s'",
						$sql_extra,
						datetime_convert(),   // update edited timestamp
						intval(api_user()),
						dbesc($photo_id),
						dbesc($album));
			} else {
				$nothingtodo = true;
			}

			if (x($_FILES,'media')) {
				$nothingtodo = false;
				$media = $_FILES['media'];
				$data = save_media_to_database("photo", $media, $type, $album, $allow_cid, $deny_cid, $allow_gid, $deny_gid, $desc, 0, $visibility, $photo_id);
				if (!is_null($data)) {
					return api_format_data("photo_update", $type, $data);
				}
			}

			// return success of updating or error message
			if ($result) {
				$answer = array('result' => 'updated', 'message' => 'Image id `' . $photo_id . '` has been updated.');
				return api_format_data("photo_update", $type, array('$result' => $answer));
			} else {
				if ($nothingtodo) {
					$answer = array('result' => 'cancelled', 'message' => 'Nothing to update for image id `' . $photo_id . '`.');
					return api_format_data("photo_update", $type, array('$result' => $answer));
				}
				throw new InternalServerErrorException("unknown error - update photo entry in database failed");
			}
		}
		throw new InternalServerErrorException("unknown error - this error on uploading or updating a photo should never happen");
	}


	/**
	 * @brief delete a single photo from the database through api
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photo_delete($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		// input params
		$photo_id = (x($_REQUEST, 'photo_id') ? $_REQUEST['photo_id'] : null);

		// do several checks on input parameters
		// we do not allow calls without photo id
		if ($photo_id == null) {
			throw new BadRequestException("no photo_id specified");
		}
		// check if photo is existing in database
		$r = q("SELECT * FROM `photo` WHERE `uid` = %d AND `resource-id` = '%s'",
				intval(api_user()),
				dbesc($photo_id)
			);
		if (!dbm::is_result($r)) {
			throw new BadRequestException("photo not available");
		}
		// now we can perform on the deletion of the photo
		$result = q("DELETE FROM `photo` WHERE `uid` = %d AND `resource-id` = '%s'",
				intval(api_user()),
				dbesc($photo_id));

		// return success of deletion or error message
		if ($result) {
			// retrieve the id of the parent element (the photo element)
			$photo_item = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `resource-id` = '%s' AND `type` = 'photo'",
				intval(local_user()),
				dbesc($photo_id)
				);

			if (!dbm::is_result($photo_item)) {
				throw new InternalServerErrorException("problem with deleting items occured");
			}
			// function for setting the items to "deleted = 1" which ensures that comments, likes etc. are not shown anymore
			// to the user and the contacts of the users (drop_items() do all the necessary magic to avoid orphans in database and federate deletion)
			drop_item($photo_item[0]['id'], false);

			$answer = array('result' => 'deleted', 'message' => 'photo with id `' . $photo_id . '` has been deleted from server.');
			return api_format_data("photo_delete", $type, array('$result' => $answer));
		} else {
			throw new InternalServerErrorException("unknown error on deleting photo from database table");
		}
	}


	/**
	 * @brief returns the details of a specified photo id, if scale is given, returns the photo data in base 64
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_fr_photo_detail($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);
		$photo_id = $_REQUEST['photo_id'];

		// prepare json/xml output with data from database for the requested photo
		$data = prepare_photo_data($type, $scale, $photo_id);

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


	/**
	 * @brief updates the profile image for the user (either a specified profile or the default profile)
	 *
	 * @param string $type Known types are 'atom', 'rss', 'xml' and 'json'
	 * @return string
	 */
	function api_account_update_profile_image($type) {
		if (api_user() === false) {
			throw new ForbiddenException();
		}
		// input params
		$profileid = (x($_REQUEST, 'profile_id') ? $_REQUEST['profile_id'] : 0);

		// error if image data is missing
		if (!x($_FILES, 'image')) {
			throw new BadRequestException("no media data submitted");
		}

		// check if specified profile id is valid
		if ($profileid != 0) {
			$r = q("SELECT * FROM `profile` WHERE `uid` = %d AND `id` = %d",
				intval(api_user()),
				intval($profileid));
			// error message if specified profile id is not in database
			if (!dbm::is_result($r)) {
				throw new BadRequestException("profile_id not available");
			}
			$is_default_profile = $r['profile'];
		} else {
			$is_default_profile = 1;
		}

		// get mediadata from image or media (Twitter call api/account/update_profile_image provides image)
		$media = null;
		if (x($_FILES, 'image')) {
			$media = $_FILES['image'];
		} elseif (x($_FILES, 'media')) {
			$media = $_FILES['media'];
		}
		// save new profile image
		$data = save_media_to_database("profileimage", $media, $type, t('Profile Photos'), "", "", "", "", "", $is_default_profile);

		// get filetype
		if (is_array($media['type'])) {
			$filetype = $media['type'][0];
		} else {
			$filetype = $media['type'];
		}
		if ($filetype == "image/jpeg") {
			$fileext = "jpg";
		} elseif ($filetype == "image/png") {
			$fileext = "png";
		}
		// change specified profile or all profiles to the new resource-id
		if ($is_default_profile) {
			$r = q("UPDATE `photo` SET `profile` = 0 WHERE `profile` = 1 AND `resource-id` != '%s' AND `uid` = %d",
				dbesc($data['photo']['id']),
				intval(local_user())
			);

			$r = q("UPDATE `contact` SET `photo` = '%s', `thumb` = '%s', `micro` = '%s'  WHERE `self` AND `uid` = %d",
				dbesc(App::get_baseurl() . '/photo/' . $data['photo']['id'] . '-4.' . $fileext),
				dbesc(App::get_baseurl() . '/photo/' . $data['photo']['id'] . '-5.' . $fileext),
				dbesc(App::get_baseurl() . '/photo/' . $data['photo']['id'] . '-6.' . $fileext),
				intval(local_user())
			);
		} else {
			$r = q("update profile set photo = '%s', thumb = '%s' where id = %d and uid = %d",
				dbesc(App::get_baseurl() . '/photo/' . $data['photo']['id'] . '-4.' . $filetype),
				dbesc(App::get_baseurl() . '/photo/' . $data['photo']['id'] . '-5.' . $filetype),
				intval($_REQUEST['profile']),
				intval(local_user())
					);
		}

		// we'll set the updated profile-photo timestamp even if it isn't the default profile,
		// so that browsers will do a cache update unconditionally

		$r = q("UPDATE `contact` SET `avatar-date` = '%s' WHERE `self` = 1 AND `uid` = %d",
			dbesc(datetime_convert()),
			intval(local_user())
		);

		// Update global directory in background
		//$user = api_get_user(get_app());
		$url = App::get_baseurl() . '/profile/' . get_app()->user['nickname'];
		if ($url && strlen(get_config('system', 'directory'))) {
			proc_run(PRIORITY_LOW, "include/directory.php", $url);
		}

		require_once 'include/profile_update.php';
		profile_change();

		// output for client
		if ($data) {
			return api_account_verify_credentials($type);
		} else {
			// SaveMediaToDatabase failed for some reason
			throw new InternalServerErrorException("image upload failed");
		}
	}

	// place api-register for photoalbum calls before 'api/friendica/photo', otherwise this function is never reached
	api_register_func('api/friendica/photoalbum/delete', 'api_fr_photoalbum_delete', true, API_METHOD_DELETE);
	api_register_func('api/friendica/photoalbum/update', 'api_fr_photoalbum_update', true, API_METHOD_POST);
	api_register_func('api/friendica/photos/list', 'api_fr_photos_list', true);
	api_register_func('api/friendica/photo/create', 'api_fr_photo_create_update', true, API_METHOD_POST);
	api_register_func('api/friendica/photo/update', 'api_fr_photo_create_update', true, API_METHOD_POST);
	api_register_func('api/friendica/photo/delete', 'api_fr_photo_delete', true, API_METHOD_DELETE);
	api_register_func('api/friendica/photo', 'api_fr_photo_detail', true);
	api_register_func('api/account/update_profile_image', 'api_account_update_profile_image', true, API_METHOD_POST);


	function check_acl_input($acl_string) {
		if ($acl_string == null || $acl_string == " ") {
			return false;
		}
		$contact_not_found = false;

		// split <x><y><z> into array of cid's
		preg_match_all("/<[A-Za-z0-9]+>/", $acl_string, $array);

		// check for each cid if it is available on server
		$cid_array = $array[0];
		foreach ($cid_array as $cid) {
			$cid = str_replace("<", "", $cid);
			$cid = str_replace(">", "", $cid);
			$contact = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d",
							intval($cid),
							intval(api_user()));
			$contact_not_found |= !dbm::is_result($contact);
		}
		return $contact_not_found;
	}

	function save_media_to_database($mediatype, $media, $type, $album, $allow_cid, $deny_cid, $allow_gid, $deny_gid, $desc, $profile = 0, $visibility = false, $photo_id = null) {
		$visitor   = 0;
		$src = "";
		$filetype = "";
		$filename = "";
		$filesize = 0;

		if (is_array($media)) {
			if (is_array($media['tmp_name'])) {
				$src = $media['tmp_name'][0];
			} else {
				$src = $media['tmp_name'];
			}
			if (is_array($media['name'])) {
				$filename = basename($media['name'][0]);
			} else {
				$filename = basename($media['name']);
			}
			if (is_array($media['size'])) {
				$filesize = intval($media['size'][0]);
			} else {
				$filesize = intval($media['size']);
			}
			if (is_array($media['type'])) {
				$filetype = $media['type'][0];
			} else {
				$filetype = $media['type'];
			}
		}

		if ($filetype == "") {
			$filetype=guess_image_type($filename);
		}
		$imagedata = getimagesize($src);
		if ($imagedata) {
			$filetype = $imagedata['mime'];
		}
		logger("File upload src: " . $src . " - filename: " . $filename .
			" - size: " . $filesize . " - type: " . $filetype, LOGGER_DEBUG);

		// check if there was a php upload error
		if ($filesize == 0 && $media['error'] == 1) {
			throw new InternalServerErrorException("image size exceeds PHP config settings, file was rejected by server");
		}
		// check against max upload size within Friendica instance
		$maximagesize = get_config('system', 'maximagesize');
		if (($maximagesize) && ($filesize > $maximagesize)) {
			$formattedBytes = formatBytes($maximagesize);
			throw new InternalServerErrorException("image size exceeds Friendica config setting (uploaded size: $formattedBytes)");
		}

		// create Photo instance with the data of the image
		$imagedata = @file_get_contents($src);
		$ph = new Photo($imagedata, $filetype);
		if (! $ph->is_valid()) {
			throw new InternalServerErrorException("unable to process image data");
		}

		// check orientation of image
		$ph->orient($src);
		@unlink($src);

		// check max length of images on server
		$max_length = get_config('system', 'max_image_length');
		if (! $max_length) {
			$max_length = MAX_IMAGE_LENGTH;
		}
		if ($max_length > 0) {
			$ph->scaleImage($max_length);
			logger("File upload: Scaling picture to new size " . $max_length, LOGGER_DEBUG);
		}
		$width = $ph->getWidth();
		$height = $ph->getHeight();

		// create a new resource-id if not already provided
		$hash = ($photo_id == null) ? photo_new_resource() : $photo_id;

		if ($mediatype == "photo") {
			// upload normal image (scales 0, 1, 2)
			logger("photo upload: starting new photo upload", LOGGER_DEBUG);

			$r =$ph->store(local_user(), $visitor, $hash, $filename, $album, 0, 0, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
			if (! $r) {
				logger("photo upload: image upload with scale 0 (original size) failed");
			}
			if($width > 640 || $height > 640) {
				$ph->scaleImage(640);
				$r = $ph->store(local_user(),$visitor, $hash, $filename, $album, 1, 0, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
				if (! $r) {
					logger("photo upload: image upload with scale 1 (640x640) failed");
				}
			}

			if ($width > 320 || $height > 320) {
				$ph->scaleImage(320);
				$r = $ph->store(local_user(), $visitor, $hash, $filename, $album, 2, 0, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
				if (! $r) {
					logger("photo upload: image upload with scale 2 (320x320) failed");
				}
			}
			logger("photo upload: new photo upload ended", LOGGER_DEBUG);
		} elseif ($mediatype == "profileimage") {
			// upload profile image (scales 4, 5, 6)
			logger("photo upload: starting new profile image upload", LOGGER_DEBUG);

			if ($width > 175 || $height > 175) {
				$ph->scaleImage(175);
				$r = $ph->store(local_user(),$visitor, $hash, $filename, $album, 4, $profile, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
				if (! $r) {
					logger("photo upload: profile image upload with scale 4 (175x175) failed");
				}
			}

			if ($width > 80 || $height > 80) {
				$ph->scaleImage(80);
				$r = $ph->store(local_user(),$visitor, $hash, $filename, $album, 5, $profile, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
				if (! $r) {
					logger("photo upload: profile image upload with scale 5 (80x80) failed");
				}
			}

			if ($width > 48 || $height > 48) {
				$ph->scaleImage(48);
				$r = $ph->store(local_user(), $visitor, $hash, $filename, $album, 6, $profile, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $desc);
				if (! $r) {
					logger("photo upload: profile image upload with scale 6 (48x48) failed");
				}
			}
			$ph->__destruct();
			logger("photo upload: new profile image upload ended", LOGGER_DEBUG);
		}

		if ($r) {
			// create entry in 'item'-table on new uploads to enable users to comment/like/dislike the photo
			if ($photo_id == null && $mediatype == "photo") {
				post_photo_item($hash, $allow_cid, $deny_cid, $allow_gid, $deny_gid, $filetype, $visibility);
			}
			// on success return image data in json/xml format (like /api/friendica/photo does when no scale is given)
			return prepare_photo_data($type, false, $hash);
		} else {
			throw new InternalServerErrorException("image upload failed");
		}
	}

	function post_photo_item($hash, $allow_cid, $deny_cid, $allow_gid, $deny_gid, $filetype, $visibility = false) {
		// get data about the api authenticated user
		$uri = item_new_uri(get_app()->get_hostname(), intval(api_user()));
		$owner_record = q("SELECT * FROM `contact` WHERE `uid`= %d AND `self` LIMIT 1", intval(api_user()));

		$arr = array();
		$arr['guid']          = get_guid(32);
		$arr['uid']           = intval(api_user());
		$arr['uri']           = $uri;
		$arr['parent-uri']    = $uri;
		$arr['type']          = 'photo';
		$arr['wall']          = 1;
		$arr['resource-id']   = $hash;
		$arr['contact-id']    = $owner_record[0]['id'];
		$arr['owner-name']    = $owner_record[0]['name'];
		$arr['owner-link']    = $owner_record[0]['url'];
		$arr['owner-avatar']  = $owner_record[0]['thumb'];
		$arr['author-name']   = $owner_record[0]['name'];
		$arr['author-link']   = $owner_record[0]['url'];
		$arr['author-avatar'] = $owner_record[0]['thumb'];
		$arr['title']         = "";
		$arr['allow_cid']     = $allow_cid;
		$arr['allow_gid']     = $allow_gid;
		$arr['deny_cid']      = $deny_cid;
		$arr['deny_gid']      = $deny_gid;
		$arr['last-child']    = 1;
		$arr['visible']       = $visibility;
		$arr['origin']        = 1;

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

		// adds link to the thumbnail scale photo
		$arr['body'] = '[url=' . App::get_baseurl() . '/photos/' . $owner_record[0]['name'] . '/image/' . $hash . ']'
					. '[img]' . App::get_baseurl() . '/photo/' . $hash . '-' . "2" . '.'. $typetoext[$filetype] . '[/img]'
					. '[/url]';

		// do the magic for storing the item in the database and trigger the federation to other contacts
		item_store($arr);
	}

	function prepare_photo_data($type, $scale, $photo_id) {
		$scale_sql = ($scale === false ? "" : sprintf("and scale=%d", intval($scale)));
		$data_sql = ($scale === false ? "" : "data, ");

		// added allow_cid, allow_gid, deny_cid, deny_gid to output as string like stored in database
		// clients needs to convert this in their way for further processing
		$r = q("SELECT %s `resource-id`, `created`, `edited`, `title`, `desc`, `album`, `filename`,
						`type`, `height`, `width`, `datasize`, `profile`, `allow_cid`, `deny_cid`, `allow_gid`, `deny_gid`,
					    MIN(`scale`) AS `minscale`, MAX(`scale`) AS `maxscale`
				FROM `photo` WHERE `uid` = %d AND `resource-id` = '%s' %s GROUP BY `resource-id`",
			$data_sql,
			intval(local_user()),
			dbesc($photo_id),
			$scale_sql
		);

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

		// prepare output data for photo
		if (dbm::is_result($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();
				// when we have profile images we could have only scales from 4 to 6, but index of array always needs to start with 0
				$i = 0;
				for ($k = intval($data['photo']['minscale']); $k <= intval($data['photo']['maxscale']); $k++) {
					$data['photo']['link'][$i] = App::get_baseurl() . "/photo/" . $data['photo']['resource-id'] . "-" . $k . "." . $typetoext[$data['photo']['type']];
					$i++;
				}
			}
			unset($data['photo']['resource-id']);
			unset($data['photo']['minscale']);
			unset($data['photo']['maxscale']);

		} else {
			throw new NotFoundException();
		}

		// retrieve item element for getting activities (like, dislike etc.) related to photo
		$item = q("SELECT * FROM `item` WHERE `uid` = %d AND `resource-id` = '%s' AND `type` = 'photo'",
			intval(local_user()),
			dbesc($photo_id)
		);
		$data['photo']['friendica_activities'] = api_format_items_activities($item[0], $type);

		// retrieve comments on photo
		$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, `item`.`network` AS `item_network`,
			`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
			`contact`.`network`, `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
			`contact`.`id` AS `cid`
			FROM `item`
			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id` AND `contact`.`uid` = `item`.`uid`
				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
			WHERE `item`.`parent` = %d AND `item`.`visible`
			AND NOT `item`.`moderated` AND NOT `item`.`deleted`
			AND `item`.`uid` = %d AND (`item`.`verb`='%s' OR `type`='photo')",
			intval($item[0]['parent']),
			intval(api_user()),
			dbesc(ACTIVITY_POST)
		);

		// prepare output of comments
		$commentData = api_format_items($r, api_get_user(get_app()), false, $type);
		$comments = array();
		if ($type == "xml") {
			$k = 0;
			foreach ($commentData as $comment) {
				$comments[$k++ . ":comment"] = $comment;
			}
		} else {
			foreach ($commentData as $comment) {
				$comments[] = $comment;
			}
		}
		$data['photo']['friendica_comments'] = $comments;

		// include info if rights on photo and rights on item are mismatching
		$rights_mismatch = $data['photo']['allow_cid'] != $item[0]['allow_cid'] ||
			$data['photo']['deny_cid'] != $item[0]['deny_cid'] ||
			$data['photo']['allow_gid'] != $item[0]['allow_gid'] ||
			$data['photo']['deny_cid'] != $item[0]['deny_cid'];
		$data['photo']['rights_mismatch'] = $rights_mismatch;

		return $data;
	}


	/**
	 * 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;
		}

		/// @TODO "$1" should maybe mean '$1' ?
		$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 (dbm::is_result($r)) {
			$nick = $r[0]["nick"];
		}

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

			if (dbm::is_result($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');
		}

	}

	/// @TODO move to top of file or somwhere better
	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"));
	}

	/// @TODO move to top of file or somwhere better
	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));
		}
	}

	/// @TODO move to top of file or somwhere better
	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)) {
			$success = array('success' => false, 'search_results' => 'problem with query');
		} elseif (count($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));
	}

	/// @TODO move to top of file or somwhere better
	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
		$self = q("SELECT `nurl` FROM `contact` WHERE `uid`= %d AND `self` LIMIT 1", intval(api_user()));

		$result = array('multi_profiles' => $multi_profiles ? true : false,
						'global_dir' => $directory,
						'friendica_owner' => api_get_user($a, $self[0]['nurl']),
						'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);

/*
@TODO Maybe open to implement?
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
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
*/