/engine/start.php

<?php



	/**

	 * Elgg engine bootstrapper

	 * Loads the various elements of the Elgg engine

	 * 

	 * @package Elgg

	 * @subpackage Core

	 * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2

	 * @author Curverider Ltd

	 * @copyright Curverider Ltd 2008-2009

	 * @link http://elgg.org/

	 */



	/*

	 * Basic profiling

	 */

	global $START_MICROTIME; 

	$START_MICROTIME = microtime(true);



	/**

	 * Load important prerequisites

	 */

		

		if (!include_once(dirname(__FILE__) . "/lib/exceptions.php")) {		// Exceptions 

			echo "Error in installation: could not load the Exceptions library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/elgglib.php")) {		// Main Elgg library

			echo "Elgg could not load its main library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/access.php")) {		// Access library

			echo "Error in installation: could not load the Access library.";

			exit;

		}

	

		if (!include_once(dirname(__FILE__) . "/lib/system_log.php")) {		// Logging library

			echo "Error in installation: could not load the System Log library.";

			exit;

		}

	

		if (!include_once(dirname(__FILE__) . "/lib/export.php")) {		// Export library

			echo "Error in installation: could not load the Export library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/sessions.php")) {

			echo ("Error in installation: Elgg could not load the Sessions library");

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/languages.php")) {		// Languages library

			echo "Error in installation: could not load the languages library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/input.php")) {		// Input library

			echo "Error in installation: could not load the input library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/install.php")) {		// Installation library

			echo "Error in installation: could not load the installation library.";

			exit;

		}

		

		if (!include_once(dirname(__FILE__) . "/lib/cache.php")) {		// Installation library

			echo "Error in installation: could not load the cache library.";

			exit;

		}

		

		

		

		// Use fallback view until sanitised

		$oldview = get_input('view');

		set_input('view', 'failsafe');

		

	/**

	 * Set light mode default

	 */

		$lightmode = false;

		

	/**

	 * Establish handlers

	 */

		

	// Register the error handler

		set_error_handler('__elgg_php_error_handler');

		set_exception_handler('__elgg_php_exception_handler');

		

	/**

	 * If there are basic issues with the way the installation is formed, don't bother trying

	 * to load any more files

	 */

		

		if ($sanitised = sanitised()) {	// Begin portion for sanitised installs only

	

		 /**

		 * Load the system settings

		 */

			

			if (!include_once(dirname(__FILE__) . "/settings.php"))  		// Global settings

				throw new InstallationException("Elgg could not load the settings file.");

				

		/**

		 * Load and initialise the database

		 */

	

			if (!include_once(dirname(__FILE__) . "/lib/database.php"))	// Database connection

				throw new InstallationException("Elgg could not load the main Elgg database library.");

				

		/**

		 * Load the remaining libraries from /lib/ in alphabetical order,

		 * except for a few exceptions

		 */

			

			if (!include_once(dirname(__FILE__) . "/lib/actions.php")) {

				throw new InstallationException("Elgg could not load the Actions library");

			}	



				



		// We don't want to load or reload these files

	

			$file_exceptions = array(

										'.','..',

										'.DS_Store',

										'Thumbs.db',

										'.svn',

										'CVS','cvs',

										'settings.php','settings.example.php','languages.php','exceptions.php','elgglib.php','access.php','database.php','actions.php','sessions.php'

									);

	

		// Get the list of files to include, and alphabetically sort them

	

			$files = get_library_files(dirname(__FILE__) . "/lib",$file_exceptions);

			asort($files);

			

		// Get config

			global $CONFIG;

	

		// Include them

			foreach($files as $file) {

				if (isset($CONFIG->debug) && $CONFIG->debug) error_log("Loading $file..."); 

				if (!include_once($file))

					throw new InstallationException("Could not load {$file}");

			}

		

		} else {	// End portion for sanitised installs only

			

			throw new InstallationException(elgg_echo('installation:error:configuration'));

			

		}

		

		// Autodetect some default configuration settings

			set_default_config();

	

		// Trigger events

			trigger_elgg_event('boot', 'system');

			

		// Load plugins

		

			$installed = is_installed();

			$db_installed = is_db_installed();

			

			// Determine light mode

			$lm = strtolower(get_input('lightmode'));

			if ($lm == 'true') $lightmode = true;

			

			// Load plugins, if we're not in light mode

			if (($installed) && ($db_installed) && ($sanitised) && (!$lightmode)) {

				load_plugins();

				

				trigger_elgg_event('plugins_boot', 'system');

			}

			

		// Forward if we haven't been installed

			if ((!$installed || !$db_installed) && !substr_count($_SERVER["PHP_SELF"],"install.php") && !substr_count($_SERVER["PHP_SELF"],"css.php") && !substr_count($_SERVER["PHP_SELF"],"action_handler.php")) {

					header("Location: install.php");

					exit;

			}

			

		// Trigger events

			if (!substr_count($_SERVER["PHP_SELF"],"install.php") &&

				!substr_count($_SERVER["PHP_SELF"],"setup.php") &&

				!$lightmode

				&& !(defined('upgrading') && upgrading == 'upgrading')) {

				// If default settings haven't been installed, forward to the default settings page

				trigger_elgg_event('init', 'system');

				//if (!datalist_get('default_settings')) {

					//forward("setup.php");

				//}

			}

			

		// System booted, return to normal view

			set_input('view', $oldview);

			if (empty($oldview)) {

				if (empty($CONFIG->view)) 

					$oldview = 'default';

				else

					$oldview = $CONFIG->view;

			}

			

			if (($installed) && ($db_installed)) 

			{

				$lastupdate = datalist_get('simplecache_lastupdate');

				$lastcached = datalist_get('simplecache_'.$oldview);

				if ($lastupdate == 0 || $lastcached < $lastupdate) {

					elgg_view_regenerate_simplecache();

					$lastcached = time();

					datalist_set('simplecache_lastupdate',$lastcached);

					datalist_set('simplecache_'.$oldview,$lastcached);

				}

				$CONFIG->lastcache = $lastcached;

			}

?>