prepare();
}
/**
* Retrieves the list of available symbol classes,
* creates objects of these classes and stores them.
*
* @return void
*/
protected function prepare() {
$symbol_registry = $this->symbol_registry;
/**
* Filtered registered symbols on calculators
*
* @since 1.7
*
* @param string[] $symbol_registry
*
* @return string[]
*/
$symbol_registry = apply_filters( 'forminator_calculator_symbol_registry', $symbol_registry );
foreach ( $symbol_registry as $symbol_class_name ) {
$symbol = new $symbol_class_name();
$this->symbols[ $symbol_class_name ] = $symbol;
}
}
/**
* Returns the symbol that has the given identifier.
* Returns null if none is found.
*
* @param string $identifier Identifier.
*
* @return Forminator_Calculator_Symbol_Abstract|null
*/
public function find( $identifier ) {
// allow strict compare with strtolower.
$identifier = strtolower( $identifier );
foreach ( $this->symbols as $symbol ) {
if ( in_array( $identifier, $symbol->get_identifiers(), true ) ) {
return $symbol;
}
}
return null;
}
/**
* Returns all symbols that inherit from a given abstract
* parent type (class): The parent type has to be an
* AbstractSymbol.
* Notice: The parent type name will not be validated!
*
* @param string $parent_type_name Parent type name.
*
* @return Forminator_Calculator_Symbol_Abstract[]
*/
public function find_sub_types( $parent_type_name ) {
$symbols = array();
foreach ( $this->symbols as $symbol ) {
if ( $symbol instanceof $parent_type_name ) {
$symbols[] = $symbol;
}
}
return $symbols;
}
}