137 lines
3.7 KiB
PHP
137 lines
3.7 KiB
PHP
<?php
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/**
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* Class to implement stub globals, which are globals that delay loading the
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* their associated module code by deferring initialisation until the first
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* method call.
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*
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* Note on unstub loops:
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*
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* Unstub loops (infinite recursion) sometimes occur when a constructor calls
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* another function, and the other function calls some method of the stub. The
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* best way to avoid this is to make constructors as lightweight as possible,
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* deferring any initialisation which depends on other modules. As a last
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* resort, you can use StubObject::isRealObject() to break the loop, but as a
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* general rule, the stub object mechanism should be transparent, and code
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* which refers to it should be kept to a minimum.
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*/
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class StubObject {
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var $mGlobal, $mClass, $mParams;
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function __construct( $global = null, $class = null, $params = array() ) {
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$this->mGlobal = $global;
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$this->mClass = $class;
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$this->mParams = $params;
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}
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static function isRealObject( $obj ) {
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return is_object( $obj ) && !($obj instanceof StubObject);
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}
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function _call( $name, $args ) {
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$this->_unstub( $name, 5 );
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return call_user_func_array( array( $GLOBALS[$this->mGlobal], $name ), $args );
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}
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function _newObject() {
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return wfCreateObject( $this->mClass, $this->mParams );
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}
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function __call( $name, $args ) {
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return $this->_call( $name, $args );
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}
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/**
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* This is public, for the convenience of external callers wishing to access
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* properties, e.g. eval.php
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*/
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function _unstub( $name = '_unstub', $level = 2 ) {
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static $recursionLevel = 0;
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if ( get_class( $GLOBALS[$this->mGlobal] ) != $this->mClass ) {
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$fname = __METHOD__.'-'.$this->mGlobal;
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wfProfileIn( $fname );
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$caller = wfGetCaller( $level );
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if ( ++$recursionLevel > 2 ) {
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throw new MWException( "Unstub loop detected on call of \${$this->mGlobal}->$name from $caller\n" );
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}
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wfDebug( "Unstubbing \${$this->mGlobal} on call of \${$this->mGlobal}->$name from $caller\n" );
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$GLOBALS[$this->mGlobal] = $this->_newObject();
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--$recursionLevel;
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wfProfileOut( $fname );
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}
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}
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}
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class StubContLang extends StubObject {
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function __construct() {
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parent::__construct( 'wgContLang' );
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}
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function __call( $name, $args ) {
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return StubObject::_call( $name, $args );
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}
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function _newObject() {
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global $wgContLanguageCode;
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$obj = Language::factory( $wgContLanguageCode );
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$obj->initEncoding();
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$obj->initContLang();
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return $obj;
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}
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}
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class StubUserLang extends StubObject {
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function __construct() {
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parent::__construct( 'wgLang' );
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}
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function __call( $name, $args ) {
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return $this->_call( $name, $args );
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}
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function _newObject() {
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global $wgContLanguageCode, $wgRequest, $wgUser, $wgContLang;
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$code = $wgRequest->getVal('uselang', $wgUser->getOption('language') );
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// if variant is explicitely selected, use it instead the one from wgUser
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// see bug #7605
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if($wgContLang->hasVariants()){
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$variant = $wgContLang->getPreferredVariant();
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if($variant != $wgContLanguageCode)
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$code = $variant;
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}
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# Validate $code
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if( empty( $code ) || !preg_match( '/^[a-z-]+$/', $code ) ) {
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wfDebug( "Invalid user language code\n" );
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$code = $wgContLanguageCode;
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}
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if( $code === $wgContLanguageCode ) {
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return $wgContLang;
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} else {
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$obj = Language::factory( $code );
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return $obj;
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}
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}
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}
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class StubUser extends StubObject {
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function __construct() {
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parent::__construct( 'wgUser' );
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}
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function __call( $name, $args ) {
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return $this->_call( $name, $args );
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}
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function _newObject() {
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global $wgCommandLineMode;
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if( $wgCommandLineMode ) {
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$user = new User;
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} else {
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$user = User::newFromSession();
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wfRunHooks('AutoAuthenticate',array(&$user));
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}
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return $user;
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}
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}
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