Extensions are a part of the Hooks API that extend the available settings for a Reaction. Extensions can do things like prevent a Reaction from from actually responding to a particular fire of an Event, and listen for when an event fire is a “hit,” or when it is a “miss.” Extensions are different than Reactors, in that extensions do not actually take action to respond to an event, they only dictate and/or detect whether the Reactor fires.
Extensions extend the WordPoints_Hook_Extension class, and are registered with the hook extensions class registry:
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/** * Register hook extension when the extension registry is initialized. * * @since 1.0.0 * * @WordPress\action wordpoints_init_app_registry-hooks-extensions * * @param WordPoints_Class_Registry_Persistent $extensions The extension registry. */ function wordpoints_my_prefix_hook_extensions_init( $extensions ) { $extensions->register( 'example', 'WordPoints_Hook_Extension_Example' ); } add_action( 'wordpoints_init_app_registery-hooks-extensions' , 'wordpoints_my_prefix_hook_extensions_init' ); |
Extensions can also implement several different interfaces, in order to listen for whether a fire hit or missed:
WordPoints_Hook_Extension_Hit_ListenerIWordPoints_Hook_Extension_Miss_ListenerI