<?php
# The main wiki script and things like database
# conversion and maintenance scripts all share a
# common setup of including lots of classes and
# setting up a few globals.
#

global $wgProfiling, $wgProfileSampleRate, $wgIP, $wgUseSquid;

if( !isset( $wgProfiling ) )
	$wgProfiling = false;

if ( $wgProfiling and (0 == rand() % $wgProfileSampleRate ) ) {        
	require_once( 'Profiling.php' );
} else {
	function wfProfileIn( $fn = '' ) {}
	function wfProfileOut( $fn = '' ) {}
	function wfGetProfilingOutput( $s, $e ) {}
	function wfProfileClose() {}
}

/* collect the originating ips */
if( $wgUseSquid && isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
	# If the web server is behind a reverse proxy, we need to find
	# out where our requests are really coming from.
	$hopips = array_map( 'trim', explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ) );

	while(in_array(trim(end($hopips)), $wgSquidServers)){
		array_pop($hopips);
	}
	$wgIP = trim(end($hopips));
} else {
	$wgIP = getenv('REMOTE_ADDR');
}


$fname = 'Setup.php';
wfProfileIn( $fname );
global $wgUseDynamicDates;
wfProfileIn( $fname.'-includes' );

require_once( 'GlobalFunctions.php' );
require_once( 'Namespace.php' );
require_once( 'RecentChange.php' ); 
require_once( 'User.php' );
require_once( 'Skin.php' );
require_once( 'OutputPage.php' );
require_once( 'LinkCache.php' );
require_once( 'Title.php' );
require_once( 'Article.php' );
require_once( 'MagicWord.php' );
require_once( 'memcached-client.php' );
require_once( 'Block.php' );
require_once( 'SearchEngine.php' );
require_once( 'DifferenceEngine.php' );
require_once( 'MessageCache.php' );
require_once( 'BlockCache.php' );
require_once( 'Parser.php' );
require_once( 'ParserCache.php' );
require_once( 'WebRequest.php' );
require_once( 'LoadBalancer.php' );

$wgRequest = new WebRequest();


wfProfileOut( $fname.'-includes' );
wfProfileIn( $fname.'-memcached' );
global $wgUser, $wgLang, $wgOut, $wgTitle;
global $wgArticle, $wgDeferredUpdateList, $wgLinkCache;
global $wgMemc, $wgMagicWords, $wgMwRedir, $wgDebugLogFile;
global $wgMessageCache, $wgUseMemCached, $wgUseDatabaseMessages;
global $wgMsgCacheExpiry, $wgCommandLineMode;
global $wgBlockCache, $wgParserCache, $wgParser, $wgDBConnections;
global $wgLoadBalancer, $wgDBservers;
global $wgDBserver, $wgDBuser, $wgDBpassword, $wgDBname, $wgDBtype;

# Useful debug output
if ( $wgCommandLineMode ) {
	# wfDebug( '"' . implode( '"  "', $argv ) . '"' );
} elseif ( function_exists( 'getallheaders' ) ) {
	wfDebug( "\nStart request\n" );
	wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
	$headers = getallheaders();
	foreach ($headers as $name => $value) {
		wfDebug( "$name: $value\n" );
	}
	wfDebug( "\n" );
} else {
	wfDebug( $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . "\n" );
}

# Set up Memcached
#
class MemCachedClientforWiki extends memcached {
	function _debugprint( $text ) {
		wfDebug( "memcached: $text\n" );
	}
}

# FakeMemCachedClient imitates the API of memcached-client v. 0.1.2.
# It acts as a memcached server with no RAM, that is, all objects are
# cleared the moment they are set. All set operations succeed and all
# get operations return null.

class FakeMemCachedClient {
	function add ($key, $val, $exp = 0) { return true; }
	function decr ($key, $amt=1) { return null; }
	function delete ($key, $time = 0) { return false; }
	function disconnect_all () { }
	function enable_compress ($enable) { }
	function forget_dead_hosts () { }
	function get ($key) { return null; }
	function get_multi ($keys) { return array_pad(array(), count($keys), null); }
	function incr ($key, $amt=1) { return null; }
	function replace ($key, $value, $exp=0) { return false; }
	function run_command ($sock, $cmd) { return null; }
	function set ($key, $value, $exp=0){ return true; }
	function set_compress_threshold ($thresh){ }
	function set_debug ($dbg) { }
	function set_servers ($list) { }
}

if( $wgUseMemCached ) {
	$wgMemc = new MemCachedClientforWiki( array('persistant' => true) );
	$wgMemc->set_servers( $wgMemCachedServers );
	$wgMemc->set_debug( $wgMemCachedDebug );

	# Test it to see if it's working
	# This is necessary because otherwise wfMsg would be extremely inefficient
	if ( !$wgMemc->set( 'test', '', 0 ) ) {
		wfDebug( "Memcached failed setup test - connection error?\n" );
		$wgUseMemCached = false;
		$wgMemc = new FakeMemCachedClient();
	}
	$messageMemc = &$wgMemc;
} else {
	$wgMemc = new FakeMemCachedClient();
	
	# Give the message cache a separate cache in the DB.
	# This is a speedup over separately querying every message used
	require_once( 'ObjectCache.php' );
	$messageMemc = new MediaWikiBagOStuff('objectcache');
}

wfProfileOut( $fname.'-memcached' );
wfProfileIn( $fname.'-database' );

if ( !$wgDBservers ) {
	$wgDBservers = array(array( 
		'host' => $wgDBserver,
		'user' => $wgDBuser,
		'password' => $wgDBpassword,
		'dbname' => $wgDBname,
		'type' => $wgDBtype,
		'load' => 1
	));
}
$wgLoadBalancer = LoadBalancer::newFromParams( $wgDBservers );
$wgLoadBalancer->force(0);

wfProfileOut( $fname.'-database' );
wfProfileIn( $fname.'-language' );
require_once( 'languages/Language.php' );

$wgMessageCache = new MessageCache; 

$wgLangClass = 'Language' . ucfirst( $wgLanguageCode );
if( ! class_exists( $wgLangClass ) || ($wgLanguageCode == 'en' && !$wgUseLatin1) ) {
	# Default to English/UTF-8
	require_once( 'languages/LanguageUtf8.php' );
	$wgLangClass = 'LanguageUtf8';
}

$wgLang = new $wgLangClass();
if ( !is_object($wgLang) ) {
	print "No language class ($wgLang)\N";
}

if( $wgUseLatin1 && $wgLanguageCode != 'en' ) {
	# For non-UTF-8 non-English.
	require_once( 'languages/LanguageLatin1.php' );
	$xxx = new LanguageLatin1( $wgLang );
	unset( $wgLang );
	$wgLang = $xxx;
}
wfProfileOut( $fname.'-language' );
wfProfileIn( $fname.'-MessageCache' );

$wgMessageCache->initialise( $messageMemc, $wgUseDatabaseMessages, $wgMsgCacheExpiry, $wgDBname );

wfProfileOut( $fname.'-MessageCache' );
wfProfileIn( $fname.'-OutputPage' );

$wgOut = new OutputPage();
wfDebug( "\n\n" );

wfProfileOut( $fname.'-OutputPage' );
wfProfileIn( $fname.'-DateFormatter' );

if ( $wgUseDynamicDates ) {
	require_once( 'DateFormatter.php' );
	global $wgDateFormatter;
	$wgDateFormatter = new DateFormatter;
}

wfProfileOut( $fname.'-DateFormatter' );
wfProfileIn( $fname.'-SetupSession' );

if( !$wgCommandLineMode && ( isset( $_COOKIE[ini_get('session.name')] ) || isset( $_COOKIE[$wgDBname.'Password'] ) ) ) {
	User::SetupSession();
}

wfProfileOut( $fname.'-SetupSession' );
wfProfileIn( $fname.'-BlockCache' );

$wgBlockCache = new BlockCache( true );

wfProfileOut( $fname.'-BlockCache' );
wfProfileIn( $fname.'-User' );

if( $wgCommandLineMode ) {
	# Used for some maintenance scripts; user session cookies can screw things up
	# when the database is in an in-between state.
	$wgUser = new User();
} else {
	$wgUser = User::loadFromSession();
}

wfProfileOut( $fname.'-User' );
wfProfileIn( $fname.'-misc' );

$wgDeferredUpdateList = array();
$wgLinkCache = new LinkCache();
$wgMagicWords = array();
$wgMwRedir =& MagicWord::get( MAG_REDIRECT );
$wgParserCache = new ParserCache();
$wgParser = new Parser();
$wgOut->setParserOptions( ParserOptions::newFromUser( $wgUser ) );
$wgDBConnections = array();

# Placeholders in case of DB error
$wgTitle = Title::newFromText( wfMsg( 'badtitle' ) );
$wgArticle = new Article($wgTitle);

wfProfileOut( $fname.'-misc' );
wfProfileIn( $fname.'-extensions' );

# Extension setup functions
# Entries should be added to this variable during the inclusion 
# of the extension file. This allows the extension to perform 
# any necessary initialisation in the fully initialised environment
foreach ( $wgExtensionFunctions as $func ) {
	$func();
}

wfProfileOut( $fname.'-extensions' );
wfProfileOut( $fname );


?>