friendica/boot.php

<?php

set_time_limit(0);

define ( 'BUILD_ID',               1040   );
define ( 'FRIENDIKA_VERSION',      '2.10.0912' );
define ( 'DFRN_PROTOCOL_VERSION',  '2.1'  );

define ( 'EOL',                    "<br />\r\n"     );
define ( 'ATOM_TIME',              'Y-m-d\TH:i:s\Z' );
define ( 'DOWN_ARROW',             '&#x21e9;'       );
         

/**
 * SSL redirection policies
 */

define ( 'SSL_POLICY_NONE',         0 );
define ( 'SSL_POLICY_FULL',         1 );
define ( 'SSL_POLICY_SELFSIGN',     2 );


/**
 * log levels
 */

define ( 'LOGGER_NORMAL',          0 );
define ( 'LOGGER_TRACE',           1 );
define ( 'LOGGER_DEBUG',           2 );
define ( 'LOGGER_DATA',            3 );
define ( 'LOGGER_ALL',             4 );

/**
 * registration policies
 */

define ( 'REGISTER_CLOSED',        0 );
define ( 'REGISTER_APPROVE',       1 );
define ( 'REGISTER_OPEN',          2 );

/**
 * relationship types
 * When used in contact records, this indicates that 'uid' has 
 * this relationship with contact['name']
 */

define ( 'REL_VIP',        1);
define ( 'REL_FAN',        2);
define ( 'REL_BUD',        3);

/**
 * Hook array order
 */
 
define ( 'HOOK_HOOK',      0);
define ( 'HOOK_FILE',      1);
define ( 'HOOK_FUNCTION',  2);

/**
 *
 * page/profile types
 *
 * PAGE_NORMAL is a typical personal profile account
 * PAGE_SOAPBOX automatically approves all friend requests as REL_FAN, (readonly)
 * PAGE_COMMUNITY automatically approves all friend requests as REL_FAN, but with 
 *      write access to wall and comments (no email and not included in page owner's ACL lists)
 * PAGE_FREELOVE automatically approves all friend requests as full friends (REL_BUD). 
 *
 */

define ( 'PAGE_NORMAL',            0 );
define ( 'PAGE_SOAPBOX',           1 );
define ( 'PAGE_COMMUNITY',         2 );
define ( 'PAGE_FREELOVE',          3 );

/**
 * Maximum number of "people who like (or don't like) this"  that we will list by name
 */

define ( 'MAX_LIKERS',    75);

/**
 * email notification options
 */

define ( 'NOTIFY_INTRO',   0x0001 );
define ( 'NOTIFY_CONFIRM', 0x0002 );
define ( 'NOTIFY_WALL',    0x0004 );
define ( 'NOTIFY_COMMENT', 0x0008 );
define ( 'NOTIFY_MAIL',    0x0010 );

/**
 * various namespaces we may need to parse
 */

define ( 'NAMESPACE_DFRN' ,           'http://purl.org/macgirvin/dfrn/1.0' ); 
define ( 'NAMESPACE_THREAD' ,         'http://purl.org/syndication/thread/1.0' );
define ( 'NAMESPACE_TOMB' ,           'http://purl.org/atompub/tombstones/1.0' );
define ( 'NAMESPACE_ACTIVITY',        'http://activitystrea.ms/spec/1.0/' );
define ( 'NAMESPACE_ACTIVITY_SCHEMA', 'http://activitystrea.ms/schema/1.0/' );
define ( 'NAMESPACE_MEDIA',           'http://purl.org/syndication/atommedia' );
define ( 'NAMESPACE_SALMON_ME',       'http://salmon-protocol.org/ns/magic-env' );
define ( 'NAMESPACE_OSTATUSSUB',      'http://ostatus.org/schema/1.0/subscribe' );
define ( 'NAMESPACE_GEORSS',          'http://www.georss.org/georss' );
define ( 'NAMESPACE_POCO',            'http://portablecontacts.net/spec/1.0' );
define ( 'NAMESPACE_FEED',            'http://schemas.google.com/g/2010#updates-from' );

/**
 * activity stream defines
 */

define ( 'ACTIVITY_LIKE',        NAMESPACE_ACTIVITY_SCHEMA . 'like' );
define ( 'ACTIVITY_DISLIKE',     NAMESPACE_DFRN            . '/dislike' );
define ( 'ACTIVITY_OBJ_HEART',   NAMESPACE_DFRN            . '/heart' );

define ( 'ACTIVITY_FRIEND',      NAMESPACE_ACTIVITY_SCHEMA . 'make-friend' );
define ( 'ACTIVITY_FOLLOW',      NAMESPACE_ACTIVITY_SCHEMA . 'follow' );
define ( 'ACTIVITY_UNFOLLOW',    NAMESPACE_ACTIVITY_SCHEMA . 'stop-following' );
define ( 'ACTIVITY_POST',        NAMESPACE_ACTIVITY_SCHEMA . 'post' );
define ( 'ACTIVITY_UPDATE',      NAMESPACE_ACTIVITY_SCHEMA . 'update' );
define ( 'ACTIVITY_TAG',         NAMESPACE_ACTIVITY_SCHEMA . 'tag' );

define ( 'ACTIVITY_OBJ_COMMENT', NAMESPACE_ACTIVITY_SCHEMA . 'comment' );
define ( 'ACTIVITY_OBJ_NOTE',    NAMESPACE_ACTIVITY_SCHEMA . 'note' );
define ( 'ACTIVITY_OBJ_PERSON',  NAMESPACE_ACTIVITY_SCHEMA . 'person' );
define ( 'ACTIVITY_OBJ_PHOTO',   NAMESPACE_ACTIVITY_SCHEMA . 'photo' );
define ( 'ACTIVITY_OBJ_P_PHOTO', NAMESPACE_ACTIVITY_SCHEMA . 'profile-photo' );
define ( 'ACTIVITY_OBJ_ALBUM',   NAMESPACE_ACTIVITY_SCHEMA . 'photo-album' );

/**
 * item weight for query ordering
 */

define ( 'GRAVITY_PARENT',       0);
define ( 'GRAVITY_LIKE',         3);
define ( 'GRAVITY_COMMENT',      6);

/**
 *
 * Reverse the effect of magic_quotes_gpc if it is enabled.
 * Please disable magic_quotes_gpc so we don't have to do this.
 * See http://php.net/manual/en/security.magicquotes.disabling.php
 *
 */

if (get_magic_quotes_gpc()) {
    $process = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
    while (list($key, $val) = each($process)) {
        foreach ($val as $k => $v) {
            unset($process[$key][$k]);
            if (is_array($v)) {
                $process[$key][stripslashes($k)] = $v;
                $process[] = &$process[$key][stripslashes($k)];
            } else {
                $process[$key][stripslashes($k)] = stripslashes($v);
            }
        }
    }
    unset($process);
}


/**
 *
 * class: App
 *
 * Our main application structure for the life of this page
 * Primarily deals with the URL that got us here
 * and tries to make some sense of it, and 
 * stores our page contents and config storage
 * and anything else that might need to be passed around 
 * before we spit the page out. 
 *
 */

if(! class_exists('App')) {
class App {

	public  $module_loaded = false;
	public  $query_string;
	public  $config;
	public  $page;
	public  $profile;
	public  $user;
	public  $cid;
	public  $contact;
	public  $content;
	public  $data;
	public  $error = false;
	public  $cmd;
	public  $argv;
	public  $argc;
	public  $module;
	public  $pager;
	public  $strings;   
	public  $path;
	public  $hooks;
	public  $timezone;
	public  $interactive = true;
	public  $plugins;
	public  $apps;
	public  $identities;

	private $scheme;
	private $hostname;
	private $baseurl;
	private $db;

	private $curl_code;
	private $curl_headers;

	function __construct() {

		$this->config = array();
		$this->page = array();
		$this->pager= array();

		$this->query_string = '';

		$this->scheme = ((isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS']))	?  'https' : 'http' );

		if(x($_SERVER,'SERVER_NAME')) {
			$this->hostname = $_SERVER['SERVER_NAME'];

			/** 
			 * Figure out if we are running at the top of a domain
			 * or in a sub-directory and adjust accordingly
			 */

			$path = trim(dirname($_SERVER['SCRIPT_NAME']),'/\\');
			if(isset($path) && strlen($path) && ($path != $this->path))
				$this->path = $path;
		}

		set_include_path("include/$this->hostname" . PATH_SEPARATOR . 'include' . PATH_SEPARATOR . '.' );

		if((x($_SERVER,'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'],0,2) === "q=")
			$this->query_string = substr($_SERVER['QUERY_STRING'],2);
		if(x($_GET,'q'))
			$this->cmd = trim($_GET['q'],'/\\');



		/**
		 *
		 * Break the URL path into C style argc/argv style arguments for our
		 * modules. Given "http://example.com/module/arg1/arg2", $this->argc
		 * will be 3 (integer) and $this->argv will contain:
		 *   [0] => 'module'
		 *   [1] => 'arg1'
		 *   [2] => 'arg2'
		 *
		 *
		 * There will always be one argument. If provided a naked domain
		 * URL, $this->argv[0] is set to "home".
		 *
		 */

		$this->argv = explode('/',$this->cmd);
		$this->argc = count($this->argv);
		if((array_key_exists('0',$this->argv)) && strlen($this->argv[0])) {
			$this->module = $this->argv[0];
		}
		else {
			$this->module = 'home';
		}

		/**
		 * Special handling for the webfinger/lrdd host XRD file
		 * Just spit out the contents and exit.
		 */

		if($this->cmd === '.well-known/host-meta') {
			require_once('include/hostxrd.php');
			hostxrd($this->hostname);
			// NOTREACHED
		}

		/**
		 * See if there is any page number information, and initialise 
		 * pagination
		 */

		$this->pager['page'] = ((x($_GET,'page')) ? $_GET['page'] : 1);
		$this->pager['itemspage'] = 50;
		$this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
		$this->pager['total'] = 0;
	}

	function get_baseurl($ssl = false) {

		$scheme = $this->scheme;

		if(x($this->config,'ssl_policy')) {
			if(($ssl) || ($this->config['ssl_policy'] == SSL_POLICY_FULL)) 
				$scheme = 'https';
			if(($this->config['ssl_policy'] == SSL_POLICY_SELFSIGN) && (local_user() || x($_POST,'auth-params')))
				$scheme = 'https';
		}

		$this->baseurl = $scheme . "://" . $this->hostname . ((isset($this->path) && strlen($this->path)) ? '/' . $this->path : '' );
		return $this->baseurl;
	}

	function set_baseurl($url) {
		$parsed = @parse_url($url);

		$this->baseurl = $url;

		if($parsed) {		
			$this->scheme = $parsed['scheme'];

			$this->hostname = $parsed['host'];
			if(x($parsed,'port'))
				$this->hostname .= ':' . $parsed['port'];
			if(x($parsed,'path'))
				$this->path = trim($parsed['path'],'\\/');
		}

	}

	function get_hostname() {
		return $this->hostname;
	}

	function set_hostname($h) {
		$this->hostname = $h;
	}

	function set_path($p) {
		$this->path = trim(trim($p),'/');
	} 

	function get_path() {
		return $this->path;
	}

	function set_pager_total($n) {
		$this->pager['total'] = intval($n);
	}

	function set_pager_itemspage($n) {
		$this->pager['itemspage'] = intval($n);
		$this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];

	} 

	function init_pagehead() {
		$this->page['title'] = $this->config['sitename'];
		$tpl = load_view_file("view/head.tpl");
		$this->page['htmlhead'] = replace_macros($tpl,array(
			'$baseurl' => $this->get_baseurl() . '/',
			'$generator' => 'Friendika' . ' ' . FRIENDIKA_VERSION
		));
	}

	function set_curl_code($code) {
		$this->curl_code = $code;
	}

	function get_curl_code() {
		return $this->curl_code;
	}

	function set_curl_headers($headers) {
		$this->curl_headers = $headers;
	}

	function get_curl_headers() {
		return $this->curl_headers;
	}


}}

// retrieve the App structure
// useful in functions which require it but don't get it passed to them

if(! function_exists('get_app')) {
function get_app() {
	global $a;
	return $a;
}};


// Multi-purpose function to check variable state.
// Usage: x($var) or $x($array,'key')
// returns false if variable/key is not set
// if variable is set, returns 1 if has 'non-zero' value, otherwise returns 0.
// e.g. x('') or x(0) returns 0;

if(! function_exists('x')) {
function x($s,$k = NULL) {
	if($k != NULL) {
		if((is_array($s)) && (array_key_exists($k,$s))) {
			if($s[$k])
				return (int) 1;
			return (int) 0;
		}
		return false;
	}
	else {		
		if(isset($s)) {
			if($s) {
				return (int) 1;
			}
			return (int) 0;
		}
		return false;
	}
}}

// called from db initialisation if db is dead.

if(! function_exists('system_unavailable')) {
function system_unavailable() {
	include('system_unavailable.php');
	system_down();
	killme();
}}

// Primarily involved with database upgrade, but also sets the 
// base url for use in cmdline programs which don't have
// $_SERVER variables, and synchronising the state of installed plugins.


if(! function_exists('check_config')) {
function check_config(&$a) {


	load_config('system');

	if(! x($_SERVER,'SERVER_NAME'))
		return;

	$build = get_config('system','build');
	if(! x($build))
		$build = set_config('system','build',BUILD_ID);

	$url = get_config('system','url');
	if(! x($url))
		$url = set_config('system','url',$a->get_baseurl());

	if($build != BUILD_ID) {
		$stored = intval($build);
		$current = intval(BUILD_ID);
		if(($stored < $current) && file_exists('update.php')) {
			// We're reporting a different version than what is currently installed.
			// Run any existing update scripts to bring the database up to current.

			require_once('update.php');
			for($x = $stored; $x < $current; $x ++) {
				if(function_exists('update_' . $x)) {
					$func = 'update_' . $x;
					$func($a);
				}
			}
			set_config('system','build', BUILD_ID);
		}
	}

	/**
	 *
	 * Synchronise plugins:
	 *
	 * $a->config['system']['addon'] contains a comma-separated list of names
	 * of plugins/addons which are used on this system. 
	 * Go through the database list of already installed addons, and if we have
	 * an entry, but it isn't in the config list, call the uninstall procedure
	 * and mark it uninstalled in the database (for now we'll remove it).
	 * Then go through the config list and if we have a plugin that isn't installed,
	 * call the install procedure and add it to the database.
	 *
	 */

	$r = q("SELECT * FROM `addon` WHERE `installed` = 1");
	if(count($r))
		$installed = $r;
	else
		$installed = array();

	$plugins = get_config('system','addon');
	$plugins_arr = array();

	if($plugins)
		$plugins_arr = explode(',',str_replace(' ', '',$plugins));

	$a->plugins = $plugins_arr;

	$installed_arr = array();

	if(count($installed)) {
		foreach($installed as $i) {
			if(! in_array($i['name'],$plugins_arr)) {
				logger("Addons: uninstalling " . $i['name']);
				q("DELETE FROM `addon` WHERE `id` = %d LIMIT 1",
					intval($i['id'])
				);

				@include_once('addon/' . $i['name'] . '/' . $i['name'] . '.php');
				if(function_exists($i['name'] . '_uninstall')) {
					$func = $i['name'] . '_uninstall';
					$func();
				}
			}
			else
				$installed_arr[] = $i['name'];
		}
	}

	if(count($plugins_arr)) {
		foreach($plugins_arr as $p) {
			if(! in_array($p,$installed_arr)) {
				logger("Addons: installing " . $p);
				$t = filemtime('addon/' . $p . '/' . $p . '.php');
				@include_once('addon/' . $p . '/' . $p . '.php');
				if(function_exists($p . '_install')) {
					$func = $p . '_install';
					$func();
					$r = q("INSERT INTO `addon` (`name`, `installed`, `timestamp`) VALUES ( '%s', 1, %d ) ",
						dbesc($p),
						intval($t)
					);
				}
			}
		}
	}


	load_hooks();

	return;
}}

// reload all updated plugins

if(! function_exists('reload_plugins')) {
function reload_plugins() {
	$plugins = get_config('system','addon');
	if(strlen($plugins)) {

		$r = q("SELECT * FROM `addon` WHERE `installed` = 1");
		if(count($r))
			$installed = $r;
		else
			$installed = array();

		$parr = explode(',',$plugins);
		if(count($parr)) {
			foreach($parr as $pl) {
				$pl = trim($pl);
				
				$t = filemtime('addon/' . $pl . '/' . $pl . '.php');
				foreach($installed as $i) {
					if(($i['name'] == $pl) && ($i['timestamp'] != $t)) {	
						logger('Reloading plugin: ' . $i['name']);
						@include_once('addon/' . $pl . '/' . $pl . '.php');

						if(function_exists($pl . '_uninstall')) {
							$func = $pl . '_uninstall';
							$func();
						}
						if(function_exists($pl . '_install')) {
							$func = $pl . '_install';
							$func();
						}
						q("UPDATE `addon` SET `timestamp` = %d WHERE `id` = %d LIMIT 1",
							intval($t),
							intval($i['id'])
						);
					}
				}
			}
		}
	}
}}
				


// This is our template processor.
// $s is the string requiring macro substitution.
// $r is an array of key value pairs (search => replace)
// returns substituted string.
// WARNING: this is pretty basic, and doesn't properly handle search strings that are substrings of each other.
// For instance if 'test' => "foo" and 'testing' => "bar", testing could become either bar or fooing, 
// depending on the order in which they were declared in the array.   

if(! function_exists('replace_macros')) {  
function replace_macros($s,$r) {

	$search = array();
	$replace = array();

	if(is_array($r) && count($r)) {
		foreach ($r as $k => $v ) {
			$search[] =  $k;
			$replace[] = $v;
		}
	}
	return str_replace($search,$replace,$s);
}}


// load string translation table for alternate language

if(! function_exists('load_translation_table')) {
function load_translation_table($lang) {
	global $a;

	if(file_exists("view/$lang/strings.php"))
		include("view/$lang/strings.php");
}}

// translate string if translation exists

if(! function_exists('t')) {
function t($s) {

	$a = get_app();

	if(x($a->strings,$s))
		return $a->strings[$s];
	return $s;
}}

// curl wrapper. If binary flag is true, return binary
// results. 

if(! function_exists('fetch_url')) {
function fetch_url($url,$binary = false, &$redirects = 0) {

	$a = get_app();

	$ch = curl_init($url);
	if(($redirects > 8) || (! $ch)) 
		return false;

	curl_setopt($ch, CURLOPT_HEADER, true);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);


	$curl_time = intval(get_config('system','curl_timeout'));
	curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));

	// by default we will allow self-signed certs
	// but you can override this

	$check_cert = get_config('system','verifyssl');
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));

	$prx = get_config('system','proxy');
	if(strlen($prx)) {
		curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
		curl_setopt($ch, CURLOPT_PROXY, $prx);
		$prxusr = get_config('system','proxyuser');
		if(strlen($prxusr))
			curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
	}
	if($binary)
		curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);

	$a->set_curl_code(0);

	// don't let curl abort the entire application
	// if it throws any errors.

	$s = @curl_exec($ch);

	$http_code = intval(curl_getinfo($ch, CURLINFO_HTTP_CODE));
	$header = substr($s,0,strpos($s,"\r\n\r\n"));
	if(stristr($header,'100') && (strlen($header) < 30)) {
		// 100 Continue has two headers, get the real one
		$s = substr($s,strlen($header)+4);
		$header = substr($s,0,strpos($s,"\r\n\r\n"));
	}
	if($http_code == 301 || $http_code == 302 || $http_code == 303) {
        $matches = array();
        preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
        $url = trim(array_pop($matches));
        $url_parsed = @parse_url($url);
        if (isset($url_parsed)) {
            $redirects++;
            return fetch_url($url,$binary,$redirects);
        }
    }
	$a->set_curl_code($http_code);

	$body = substr($s,strlen($header)+4);

	/* one more try to make sure there are no more headers */

	if(strpos($body,'HTTP/') === 0) {
		$header = substr($body,0,strpos($body,"\r\n\r\n"));
		$body = substr($body,strlen($header)+4);
	}

	$a->set_curl_headers($header);

	curl_close($ch);
	return($body);
}}

// post request to $url. $params is an array of post variables.

if(! function_exists('post_url')) {
function post_url($url,$params, $headers = null, &$redirects = 0) {
	$a = get_app();
	$ch = curl_init($url);
	if(($redirects > 8) || (! $ch)) 
		return false;

	curl_setopt($ch, CURLOPT_HEADER, true);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
	curl_setopt($ch, CURLOPT_POST,1);
	curl_setopt($ch, CURLOPT_POSTFIELDS,$params);

	$curl_time = intval(get_config('system','curl_timeout'));
	curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));

	if(is_array($headers))
		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	$check_cert = get_config('system','verifyssl');
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
	$prx = get_config('system','proxy');
	if(strlen($prx)) {
		curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
		curl_setopt($ch, CURLOPT_PROXY, $prx);
		$prxusr = get_config('system','proxyuser');
		if(strlen($prxusr))
			curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
	}

	$a->set_curl_code(0);

	// don't let curl abort the entire application
	// if it throws any errors.

	$s = @curl_exec($ch);

	$http_code = intval(curl_getinfo($ch, CURLINFO_HTTP_CODE));
	$header = substr($s,0,strpos($s,"\r\n\r\n"));
	if(stristr($header,'100') && (strlen($header) < 30)) {
		// 100 Continue has two headers, get the real one
		$s = substr($s,strlen($header)+4);
		$header = substr($s,0,strpos($s,"\r\n\r\n"));
	}
	if($http_code == 301 || $http_code == 302 || $http_code == 303) {
        $matches = array();
        preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
        $url = trim(array_pop($matches));
        $url_parsed = @parse_url($url);
        if (isset($url_parsed)) {
            $redirects++;
            return post_url($url,$binary,$headers,$redirects);
        }
    }
	$a->set_curl_code($http_code);
	$body = substr($s,strlen($header)+4);

	/* one more try to make sure there are no more headers */

	if(strpos($body,'HTTP/') === 0) {
		$header = substr($body,0,strpos($body,"\r\n\r\n"));
		$body = substr($body,strlen($header)+4);