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<?php |
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/** |
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* Factory for PageType handlers |
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* |
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* @package Stencil |
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*/ |
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/** |
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* Class HandlerFactory |
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*/ |
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class Stencil_Handler_Factory implements Stencil_Handler_Factory_Interface { |
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/** |
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* List of registered Handlers |
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* |
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* @var array |
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*/ |
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private static $handlers = array(); |
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/** |
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* Set a hierarchy handler for a page |
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* |
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* @param string $page Page to set. |
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* @param array|Traversable|null $handler Optional. Handler to use. |
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*/ |
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public static function set_hierarchy_handler( $page, $handler = null ) { |
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self::set_settable_handler( 'Hierarchy', $page, $handler = null ); |
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} |
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/** |
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* Set a page type handler |
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* |
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* @param string $page Page to set. |
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* @param callable $handler Handler to use. |
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*/ |
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public static function set_page_type_handler( $page, $handler ) { |
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self::set_settable_handler( 'PageType', $page, $handler ); |
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} |
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/** |
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* Remove handler for a page. |
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* |
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* @param string $page Page to remove from. |
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*/ |
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public static function remove_page_type_handler( $page ) { |
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self::set_settable_handler( 'PageType', $page ); |
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} |
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/** |
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* Set page type hooking function |
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* |
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* @param string $page Page to set to. |
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* @param callable $handler Handler to use. |
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*/ |
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public static function set_page_type_hooker( $page, $handler ) { |
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self::set_settable_handler( 'PageHook', $page, $handler ); |
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} |
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/** |
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* Remove page hooker from page |
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* |
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* @param string $page Page to remove from. |
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*/ |
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public static function remove_page_type_hooker( $page ) { |
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self::set_settable_handler( 'PageHook', $page ); |
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} |
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/** |
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* Get current hierarchy handler for page |
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* |
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* @param string $page Page to get from. |
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* |
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* @return array|Traversable |
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*/ |
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public static function get_hierarchy_handler( $page ) { |
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return self::get_settable_handler( $page, 'Hierarchy' ); |
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} |
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/** |
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* Get the current page type handler |
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* |
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* @param string $page Page to get from. |
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* |
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* @return callable |
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*/ |
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public static function get_page_type_handler( $page ) { |
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return self::get_settable_handler( $page, 'Page_Type' ); |
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} |
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/** |
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* Get the current page type hooker |
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* |
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* @param string $page Page to get from. |
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* |
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* @return callable |
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*/ |
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public static function get_page_type_hooker( $page ) { |
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return self::get_settable_handler( $page, 'Page_Hook' ); |
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} |
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/** |
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* Run the handler for the specified page |
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* |
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* @param string $page Page to call handler for |
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* @param Stencil_Handler_Interface $controller Controller that initiated the call |
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*/ |
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public static function run_page_type_handler( $page, Stencil_Handler_Interface $controller ) { |
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self::execute_handler( self::get_page_type_handler( $page ), $controller ); |
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} |
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/** |
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* Run the hooker for the specified page |
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* |
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* @param string $page Page to call handler for |
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* @param Stencil_Handler_Interface $controller Controller that initiated the call |
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*/ |
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public static function run_page_type_hook( $page, Stencil_Handler_Interface $controller ) { |
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self::execute_handler( self::get_page_type_hooker( $page ), $controller ); |
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} |
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/** |
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* Execute a handler if it is callable |
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* |
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* @param string $handler The handler for the page requested |
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* @param Stencil_Handler_Interface $controller Controller that initiated the call |
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*/ |
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private static function execute_handler( $handler, Stencil_Handler_Interface $controller ) { |
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if ( is_callable( $handler ) ) { |
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call_user_func( $handler, $controller ); |
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} |
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} |
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/** |
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* Unified setter function |
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* |
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* @param string $type Type of object. |
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* @param string $page Page name. |
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* @param mixed|null $handler Handler to apply. |
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* |
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* @throws InvalidArgumentException For invalid argument types. |
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*/ |
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private static function set_settable_handler( $type, $page, $handler = null ) { |
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// Create NullObject for empty handler, i.e. remove functionality. |
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if ( empty( $handler ) ) { |
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$handler = Stencil_Subclass_Factory::create_null( sprintf( 'Stencil_%s', $type ) ); |
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} |
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switch ( $type ) { |
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case 'Hierarchy': |
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if ( ! is_array( $handler ) && ! ( $handler instanceof Traversable ) ) { |
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throw new InvalidArgumentException( 'Expected $handler to be array or Traversable.' ); |
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} |
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break; |
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default: |
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if ( ! is_callable( $handler ) ) { |
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throw new InvalidArgumentException( 'Expected $handler to be callable.' ); |
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} |
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break; |
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} |
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self::$handlers[ $type ][ $page ] = $handler; |
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} |
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/** |
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* Unified getter function |
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* |
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* @param string $page Page to get from. |
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* @param string $type Type to get. |
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* |
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* @return array Callable function |
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*/ |
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private static function get_settable_handler( $page, $type ) { |
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if ( ! isset( self::$handlers[ $type ][ $page ] ) ) { |
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$handler = Stencil_Cached_Subclass_Factory::create_or_null( $page, sprintf( 'Stencil_%s', $type ) ); |
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switch ( $type ) { |
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case 'Hierarchy': |
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break; |
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default: |
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$handler = array( $handler, 'execute' ); |
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break; |
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} |
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self::$handlers[ $type ][ $page ] = $handler; |
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} |
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return self::$handlers[ $type ][ $page ]; |
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} |
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} |
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It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: