friendica/boot.php

<?php

require_once('include/config.php');
require_once('include/network.php');
require_once('include/plugin.php');
require_once('include/text.php');
require_once('include/datetime.php');
require_once('include/pgettext.php');
require_once('include/nav.php');
require_once('include/cache.php');

define ( 'FRIENDICA_PLATFORM',     'Friendica');
define ( 'FRIENDICA_VERSION',      '3.0.1378' );
define ( 'DFRN_PROTOCOL_VERSION',  '2.23'    );
define ( 'DB_UPDATE_VERSION',      1149      );

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


/**
 *
 * Image storage quality. Lower numbers save space at cost of image detail.
 * For ease of upgrade, please do not change here. Change jpeg quality with
 * $a->config['system']['jpeg_quality'] = n;
 * in .htconfig.php, where n is netween 1 and 100, and with very poor results
 * below about 50
 *
 */

define ( 'JPEG_QUALITY',            100  );
/**
 * $a->config['system']['png_quality'] from 0 (uncompressed) to 9
 */
define ( 'PNG_QUALITY',             8  );


/**
 * Not yet used
 */

define ( 'DEFAULT_DB_ENGINE',  'MyISAM'  );

/**
 * 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
 */

define ( 'CONTACT_IS_FOLLOWER', 1);
define ( 'CONTACT_IS_SHARING',  2);
define ( 'CONTACT_IS_FRIEND',   3);


/**
 * Hook array order
 */

define ( 'HOOK_HOOK',      0);
define ( 'HOOK_FILE',      1);
define ( 'HOOK_FUNCTION',  2);

/**
 * DB update return values
 */

define ( 'UPDATE_SUCCESS', 0);
define ( 'UPDATE_FAILED',  1);


/**
 *
 * page/profile types
 *
 * PAGE_NORMAL is a typical personal profile account
 * PAGE_SOAPBOX automatically approves all friend requests as CONTACT_IS_SHARING, (readonly)
 * PAGE_COMMUNITY automatically approves all friend requests as CONTACT_IS_SHARING, 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 (CONTACT_IS_FRIEND).
 *
 */

define ( 'PAGE_NORMAL',            0 );
define ( 'PAGE_SOAPBOX',           1 );
define ( 'PAGE_COMMUNITY',         2 );
define ( 'PAGE_FREELOVE',          3 );
define ( 'PAGE_BLOG',              4 );
define ( 'PAGE_PRVGROUP',          5 );

/**
 * Network and protocol family types
 */

define ( 'NETWORK_DFRN',             'dfrn');    // Friendica, Mistpark, other DFRN implementations
define ( 'NETWORK_ZOT',              'zot!');    // Zot!
define ( 'NETWORK_OSTATUS',          'stat');    // status.net, identi.ca, GNU-social, other OStatus implementations
define ( 'NETWORK_FEED',             'feed');    // RSS/Atom feeds with no known "post/notify" protocol
define ( 'NETWORK_DIASPORA',         'dspr');    // Diaspora
define ( 'NETWORK_MAIL',             'mail');    // IMAP/POP
define ( 'NETWORK_MAIL2',            'mai2');    // extended IMAP/POP
define ( 'NETWORK_FACEBOOK',         'face');    // Facebook API
define ( 'NETWORK_LINKEDIN',         'lnkd');    // LinkedIn
define ( 'NETWORK_XMPP',             'xmpp');    // XMPP
define ( 'NETWORK_MYSPACE',          'mysp');    // MySpace
define ( 'NETWORK_GPLUS',            'goog');    // Google+

define ( 'NETWORK_PHANTOM',          'unkn');    // Place holder

/**
 * These numbers are used in stored permissions
 * and existing allocations MUST NEVER BE CHANGED
 * OR RE-ASSIGNED! You may only add to them.
 */

$netgroup_ids = array(
	NETWORK_DFRN     => (-1),
	NETWORK_ZOT      => (-2),
	NETWORK_OSTATUS  => (-3),
	NETWORK_FEED     => (-4),
	NETWORK_DIASPORA => (-5),
	NETWORK_MAIL     => (-6),
	NETWORK_MAIL2    => (-7),
	NETWORK_FACEBOOK => (-8),
	NETWORK_LINKEDIN => (-9),
	NETWORK_XMPP     => (-10),
	NETWORK_MYSPACE  => (-11),
	NETWORK_GPLUS    => (-12),

	NETWORK_PHANTOM  => (-127),
);


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

define ( 'MAX_LIKERS',    75);

/**
 * Communication timeout
 */

define ( 'ZCURL_TIMEOUT' , (-1));


/**
 * email notification options
 */

define ( 'NOTIFY_INTRO',    0x0001 );
define ( 'NOTIFY_CONFIRM',  0x0002 );
define ( 'NOTIFY_WALL',     0x0004 );
define ( 'NOTIFY_COMMENT',  0x0008 );
define ( 'NOTIFY_MAIL',     0x0010 );
define ( 'NOTIFY_SUGGEST',  0x0020 );
define ( 'NOTIFY_PROFILE',  0x0040 );
define ( 'NOTIFY_TAGSELF',  0x0080 );
define ( 'NOTIFY_TAGSHARE', 0x0100 );

define ( 'NOTIFY_SYSTEM',   0x8000 );


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

define ( 'NAMESPACE_ZOT',             'http://purl.org/macgirvin/zot' );
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' );
define ( 'NAMESPACE_OSTATUS',         'http://ostatus.org/schema/1.0' );
define ( 'NAMESPACE_STATUSNET',       'http://status.net/schema/api/1/' );
define ( 'NAMESPACE_ATOM1',           'http://www.w3.org/2005/Atom' );
/**
 * 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_REQ_FRIEND',  NAMESPACE_ACTIVITY_SCHEMA . 'request-friend' );
define ( 'ACTIVITY_UNFRIEND',    NAMESPACE_ACTIVITY_SCHEMA . 'remove-friend' );
define ( 'ACTIVITY_FOLLOW',      NAMESPACE_ACTIVITY_SCHEMA . 'follow' );
define ( 'ACTIVITY_UNFOLLOW',    NAMESPACE_ACTIVITY_SCHEMA . 'stop-following' );
define ( 'ACTIVITY_JOIN',        NAMESPACE_ACTIVITY_SCHEMA . 'join' );

define ( 'ACTIVITY_POST',        NAMESPACE_ACTIVITY_SCHEMA . 'post' );
define ( 'ACTIVITY_UPDATE',      NAMESPACE_ACTIVITY_SCHEMA . 'update' );
define ( 'ACTIVITY_TAG',         NAMESPACE_ACTIVITY_SCHEMA . 'tag' );
define ( 'ACTIVITY_FAVORITE',    NAMESPACE_ACTIVITY_SCHEMA . 'favorite' );

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' );
define ( 'ACTIVITY_OBJ_EVENT',   NAMESPACE_ACTIVITY_SCHEMA . 'event' );
define ( 'ACTIVITY_OBJ_GROUP',   NAMESPACE_ACTIVITY_SCHEMA . 'group' );
define ( 'ACTIVITY_OBJ_TAGTERM', NAMESPACE_DFRN            . '/tagterm' );
define ( 'ACTIVITY_OBJ_PROFILE', NAMESPACE_DFRN            . '/profile' );

/**
 * 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
 *
 */

function startup() {
	error_reporting(E_ERROR | E_WARNING | E_PARSE);
	set_time_limit(0);

	// This has to be quite large to deal with embedded private photos
	ini_set('pcre.backtrack_limit', 500000);


	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  $contacts;
		public  $page_contact;
		public  $content;
		public  $data = array();
		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 = array();
		public  $identities;
	
		public $nav_sel;

		public $category;

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

		private $curl_code;
		private $curl_headers;

		function __construct() {

			global $default_timezone;

			$this->timezone = ((x($default_timezone)) ? $default_timezone : 'UTC');

			date_default_timezone_set($this->timezone);

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

			$this->query_string = '';

			startup();

			$this->scheme = 'http';
			if(x($_SERVER,'HTTPS') && $_SERVER['HTTPS'])
				$this->scheme = 'https';
			elseif(x($_SERVER,'SERVER_PORT') && (intval($_SERVER['SERVER_PORT']) == 443))
			$this->scheme = 'https';


			if(x($_SERVER,'SERVER_NAME')) {
				$this->hostname = $_SERVER['SERVER_NAME'];
				if(x($_SERVER,'SERVER_PORT') && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443)
					$this->hostname .= ':' . $_SERVER['SERVER_PORT'];
				/**
				 * 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
					. 'library' . PATH_SEPARATOR
					. 'library/phpsec' . PATH_SEPARATOR
					. '.' );

			if((x($_SERVER,'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'],0,2) === "q=") {
				$this->query_string = substr($_SERVER['QUERY_STRING'],2);
				// removing trailing / - maybe a nginx problem
				if (substr($this->query_string, 0, 1) == "/")
					$this->query_string = substr($this->query_string, 1);
			}
			if(x($_GET,'q'))
				$this->cmd = trim($_GET['q'],'/\\');

			// unix style "homedir"

			if(substr($this->cmd,0,1) === '~')
				$this->cmd = 'profile/' . substr($this->cmd,1);

			// Diaspora style profile url

			if(substr($this->cmd,0,2) === 'u/')
				$this->cmd = 'profile/' . substr($this->cmd,2);

			/**
			 *
			 * 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 = str_replace(".", "_", $this->argv[0]);
			}
			else {
				$this->argc = 1;
				$this->argv = array('home');
				$this->module = 'home';
			}

			/**
			 * Special handling for the webfinger/lrdd host XRD file
			 */

			if($this->cmd === '.well-known/host-meta') {
				$this->argc = 1;
				$this->argv = array('hostxrd');
				$this->module = 'hostxrd';
			}

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

			$this->pager['page'] = ((x($_GET,'page') && intval($_GET['page']) > 0) ? intval($_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($this->config,'system')) && (x($this->config['system'],'ssl_policy'))) {
				if(intval($this->config['system']['ssl_policy']) === intval(SSL_POLICY_FULL))
					$scheme = 'https';

				//	Basically, we have $ssl = true on any links which can only be seen by a logged in user
				//	(and also the login link). Anything seen by an outsider will have it turned off.

				if($this->config['system']['ssl_policy'] == SSL_POLICY_SELFSIGN) {
					if($ssl)
						$scheme = 'https';
					else
						$scheme = 'http';
				}
			}

			$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) > 0) ? intval($n) : 0);
			$this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];

		}

		function init_pagehead() {
			$interval = ((local_user()) ? get_pconfig(local_user(),'system','update_interval') : 40000);
			if($interval < 10000)
				$interval = 40000;

			$this->page['title'] = $this->config['sitename'];
			$tpl = file_get_contents('view/head.tpl');
			$this->page['htmlhead'] = replace_macros($tpl,array(
				'$baseurl' => $this->get_baseurl(), // FIXME for z_path!!!!
				'$local_user' => local_user(),
				'$generator' => 'Friendica' . ' ' . FRIENDICA_VERSION,
				'$delitem' => t('Delete this item?'),
				'$comment' => t('Comment'),
				'$showmore' => t('show more'),
				'$showfewer' => t('show fewer'),
				'$update_interval' => $interval
			));
		}

		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();
	}
}



function clean_urls() {
	global $a;
	//	if($a->config['system']['clean_urls'])
	return true;
	//	return false;
}

function z_path() {
	global $a;
	$base = $a->get_baseurl();
	if(! clean_urls())
		$base .= '/?q=';
	return $base;
}

function z_root() {
	global $a;
	return $a->get_baseurl();
}

function absurl($path) {
	if(strpos($path,'/') === 0)
		return z_path() . $path;
	return $path;
}

function is_ajax() {
	return (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');
}


// 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) {

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

		$url = get_config('system','url');

		// if the url isn't set or the stored url is radically different
		// than the currently visited url, store the current value accordingly.
		// "Radically different" ignores common variations such as http vs https
		// and www.example.com vs example.com.

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

		if($build != DB_UPDATE_VERSION) {
			$stored = intval($build);
			$current = intval(DB_UPDATE_VERSION);
			if(($stored < $current) && file_exists('update.php')) {

				load_config('database');

				// 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');

				// make sure that boot.php and update.php are the same release, we might be
				// updating right this very second and the correct version of the update.php
				// file may not be here yet. This can happen on a very busy site.

				if(DB_UPDATE_VERSION == UPDATE_VERSION) {

					for($x = $stored; $x < $current; $x ++) {
						if(function_exists('update_' . $x)) {

							// There could be a lot of processes running or about to run.
							// We want exactly one process to run the update command.
							// So store the fact that we're taking responsibility
							// after first checking to see if somebody else already has.

							// If the update fails or times-out completely you may need to
							// delete the config entry to try again.

							if(get_config('database','update_' . $x))
								break;
							set_config('database','update_' . $x, '1');

							// call the specific update

							$func = 'update_' . $x;
							$retval = $func();
							if($retval) {
								//send the administrator an e-mail
								$email_tpl = get_intltext_template("update_fail_eml.tpl");
								$email_msg = replace_macros($email_tpl, array(
									'$sitename' => $a->config['sitename'],
									'$siteurl' =>  $a->get_baseurl(),
									'$update' => $x,
									'$error' => sprintf( t('Update %s failed. See error logs.'), $x)
								));
								$subject=sprintf(t('Update Error at %s'), $a->get_baseurl());
									
								mail($a->config['admin_email'], $subject, $email_msg,
									'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
									. 'Content-type: text/plain; charset=UTF-8' . "\n"
									. 'Content-transfer-encoding: 8bit' );
								//try the logger
								logger('CRITICAL: Update Failed: '. $x);
							}
							else
								set_config('database','update_' . $x, 'success');
								
						}
					}
					set_config('system','build', DB_UPDATE_VERSION);
				}
			}
		}

		/**
		 *
		 * 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));