transform(new MyTransformation());
*/
class FormTransformation extends Object {
public function transform(FormField $field) {
// Look for a performXXTransformation() method on the field itself.
// performReadonlyTransformation() is a pretty commonly applied method.
// Otherwise, look for a transformXXXField() method on this object.
// This is more commonly done in custom transformations
// We iterate through each array simultaneously, looking at [0] of both, then [1] of both.
// This provides a more natural failover scheme.
$transNames = array_reverse(array_map(
function($name) { return ClassInfo::shortName($name); },
array_values(ClassInfo::ancestry($this->class))
));
$fieldClasses = array_reverse(array_map(
function($name) { return ClassInfo::shortName($name); },
array_values(ClassInfo::ancestry($field->class))
));
$len = max(sizeof($transNames), sizeof($fieldClasses));
for($i=0; $i<$len; $i++) {
// This is lets fieldClasses be longer than transNames
if(!empty($transNames[$i])) {
$funcName = 'perform' . $transNames[$i];
if($field->hasMethod($funcName)) {
//echo "$field->class used $funcName";
return $field->$funcName($this);
}
}
// And this one does the reverse.
if(!empty($fieldClasses[$i])) {
$funcName = 'transform' . $fieldClasses[$i];
if($this->hasMethod($funcName)) {
//echo "$field->class used $funcName";
return $this->$funcName($field);
}
}
}
throw new \BadMethodCallException("FormTransformation:: Can't perform '$this->class' on '$field->class'");
}
}