/**
* Construct a conditional segment.
* If $condition is true, use the first segment.
* Otherwise, use the second segment if it is defined.
* If not defined, then segment does not exist.
*/
public function __construct( $condition, WCSegment $segment1, WCSegment $segment2 = Null ) {
if ( $condition ) {
parent::__construct( $segment1 );
$this->exists = True;
} elseif ( $segment2 == Null ) {
$this->exists = False;
} else {
parent::__construct( $segment2 );
$this->exists = True;
}
}
/**
* Choose the first alternative in the array that exists, and cancel all
* other alternatives.
* @param array $segments Array of WCSegment objects.
*/
public function __construct( array $segments = array() ) {
$this->exists = False;
$theSegment = Null;
foreach ( $segments as $segment ) {
if ( $segment->exists() ) {
if ( $this->exists ) {
$segment->cancel();
} else {
$this->exists = True;
$theSegment = $segment;
}
}
}
parent::__construct( $theSegment );
}
