/**
* Class to implement stub globals, which are globals that delay loading the
- * their associated module code by deferring initialisation until the first
- * method call.
+ * their associated module code by deferring initialisation until the first
+ * method call.
*
- * Note on unstub loops:
+ * Note on unstub loops:
*
- * Unstub loops (infinite recursion) sometimes occur when a constructor calls
- * another function, and the other function calls some method of the stub. The
+ * Unstub loops (infinite recursion) sometimes occur when a constructor calls
+ * another function, and the other function calls some method of the stub. The
* best way to avoid this is to make constructors as lightweight as possible,
- * deferring any initialisation which depends on other modules. As a last
- * resort, you can use StubObject::isRealObject() to break the loop, but as a
- * general rule, the stub object mechanism should be transparent, and code
+ * deferring any initialisation which depends on other modules. As a last
+ * resort, you can use StubObject::isRealObject() to break the loop, but as a
+ * general rule, the stub object mechanism should be transparent, and code
* which refers to it should be kept to a minimum.
*/
class StubObject {
var $mGlobal, $mClass, $mParams;
+
+ /**
+ * Constructor.
+ *
+ * @param $global String: name of the global variable.
+ * @param $class String: name of the class of the real object.
+ * @param $params Array: parameters to pass to contructor of the real
+ * object.
+ */
function __construct( $global = null, $class = null, $params = array() ) {
$this->mGlobal = $global;
$this->mClass = $class;
$this->mParams = $params;
}
+ /**
+ * Returns a bool value whetever $obj is a stub object. Can be used to break
+ * a infinite loop when unstubbing an object.
+ *
+ * @param $obj Object to check.
+ * @return Boolean: true if $obj is not an instance of StubObject class.
+ */
static function isRealObject( $obj ) {
return is_object( $obj ) && !($obj instanceof StubObject);
}
+ /**
+ * Function called if any function exists with that name in this object.
+ * It is used to unstub the object. Only used internally, PHP will call
+ * self::__call() function and that function will call this function.
+ * This function will also call the function with the same name in the real
+ * object.
+ *
+ * @param $name String: name of the function called
+ * @param $args Array: arguments
+ */
function _call( $name, $args ) {
$this->_unstub( $name, 5 );
return call_user_func_array( array( $GLOBALS[$this->mGlobal], $name ), $args );
}
+ /**
+ * Create a new object to replace this stub object.
+ */
function _newObject() {
return wfCreateObject( $this->mClass, $this->mParams );
}
+ /**
+ * Function called by PHP if no function with that name exists in this
+ * object.
+ *
+ * @param $name String: name of the function called
+ * @param $args Array: arguments
+ */
function __call( $name, $args ) {
return $this->_call( $name, $args );
}
/**
- * This is public, for the convenience of external callers wishing to access
+ * This function creates a new object of the real class and replace it in
+ * the global variable.
+ * This is public, for the convenience of external callers wishing to access
* properties, e.g. eval.php
+ *
+ * @param $name String: name of the method called in this object.
+ * @param $level Integer: level to go in the stact trace to get the function
+ * who called this function.
*/
function _unstub( $name = '_unstub', $level = 2 ) {
static $recursionLevel = 0;
+
+ if ( !($GLOBALS[$this->mGlobal] instanceof StubObject) )
+ return $GLOBALS[$this->mGlobal]; // already unstubbed.
+
if ( get_class( $GLOBALS[$this->mGlobal] ) != $this->mClass ) {
$fname = __METHOD__.'-'.$this->mGlobal;
wfProfileIn( $fname );
if ( ++$recursionLevel > 2 ) {
throw new MWException( "Unstub loop detected on call of \${$this->mGlobal}->$name from $caller\n" );
}
- wfDebug( "Unstubbing \${$this->mGlobal} on call of \${$this->mGlobal}->$name from $caller\n" );
+ wfDebug( "Unstubbing \${$this->mGlobal} on call of \${$this->mGlobal}::$name from $caller\n" );
$GLOBALS[$this->mGlobal] = $this->_newObject();
--$recursionLevel;
wfProfileOut( $fname );
}
}
+/**
+ * Stub object for the content language of this wiki. This object have to be in
+ * $wgContLang global.
+ */
class StubContLang extends StubObject {
+
function __construct() {
parent::__construct( 'wgContLang' );
}
function __call( $name, $args ) {
- return StubObject::_call( $name, $args );
+ return $this->_call( $name, $args );
}
function _newObject() {
- global $wgContLanguageCode;
- $obj = Language::factory( $wgContLanguageCode );
+ global $wgLanguageCode;
+ $obj = Language::factory( $wgLanguageCode );
$obj->initEncoding();
$obj->initContLang();
return $obj;
}
}
+
+/**
+ * Stub object for the user language. It depends of the user preferences and
+ * "uselang" parameter that can be passed to index.php. This object have to be
+ * in $wgLang global.
+ */
class StubUserLang extends StubObject {
+
function __construct() {
parent::__construct( 'wgLang' );
}
}
function _newObject() {
- global $wgContLanguageCode, $wgRequest, $wgUser, $wgContLang;
- $code = $wgRequest->getVal('uselang', $wgUser->getOption('language') );
-
- // if variant is explicitely selected, use it instead the one from wgUser
- // see bug #7605
- if($wgContLang->hasVariants()){
- $variant = $wgContLang->getPreferredVariant();
- if($variant != $wgContLanguageCode)
- $code = $variant;
- }
+ global $wgLanguageCode, $wgRequest, $wgUser, $wgContLang;
+ $code = $wgRequest->getVal( 'uselang', $wgUser->getOption( 'language' ) );
+ // BCP 47 - letter case MUST NOT carry meaning
+ $code = strtolower( $code );
# Validate $code
- if( empty( $code ) || !preg_match( '/^[a-z-]+$/', $code ) ) {
+ if( empty( $code ) || !Language::isValidCode( $code ) || ( $code === 'qqq' ) ) {
wfDebug( "Invalid user language code\n" );
- $code = $wgContLanguageCode;
+ $code = $wgLanguageCode;
}
- if( $code == $wgContLanguageCode ) {
+ if( $code === $wgLanguageCode ) {
return $wgContLang;
} else {
$obj = Language::factory( $code );
}
}
}
-class StubUser extends StubObject {
- function __construct() {
- parent::__construct( 'wgUser' );
- }
-
- function __call( $name, $args ) {
- return $this->_call( $name, $args );
- }
-
- function _newObject() {
- global $wgCommandLineMode;
- if( $wgCommandLineMode ) {
- $user = new User;
- } else {
- $user = User::newFromSession();
- wfRunHooks('AutoAuthenticate',array(&$user));
- }
- return $user;
- }
-}
-
-
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