package org.openautonomousconnection.luascript.hosts;

/**
 * Event subscription abstraction (implemented by the client UI layer).
 */
public interface EventHost {

    /**
     * Subscribes to an element event.
     *
     * @param elementId element id
     * @param eventName event name (e.g. click)
     */
    void addListener(String elementId, String eventName);

    /**
     * Unsubscribes from an element event.
     *
     * @param elementId element id
     * @param eventName event name
     */
    void removeListener(String elementId, String eventName);

    /**
     * Subscribes to a global event (app/window scope).
     *
     * @param eventName event name
     */
    void addGlobalListener(String eventName);

    /**
     * Unsubscribes from a global event.
     *
     * @param eventName event name
     */
    void removeGlobalListener(String eventName);
}