package org.activityinfo.ui.client.page.config.mvp;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import org.activityinfo.legacy.client.AsyncMonitor;

@Deprecated
public interface CanUpdate<M> {
    interface CancelUpdateHandler extends EventHandler {
        void onCancelUpdate(CancelUpdateEvent updateEvent);
    }

    interface UpdateHandler extends EventHandler {
        void onUpdate(UpdateEvent updateEvent);
    }

    interface RequestUpdateHandler extends EventHandler {
        void onRequestUpdate(RequestUpdateEvent requestUpdateEvent);
    }

    // An item is updated by the presenter, this method updates the item at the
    // view
    void update(M item);

    // Throw away changes of given item
    void cancelUpdate(M item);

    // Throw away all changes for all changed objects
    void cancelUpdateAll();

    void startUpdate();

    // Is the update button enabled?
    void setUpdateEnabled(boolean updateEnabled);

    // Let the user know what's going on during updating
    AsyncMonitor getUpdatingMonitor();

    // The user wants to save dirty changes
    HandlerRegistration addUpdateHandler(UpdateHandler handler);

    // The user wants to cancel the changes made to an item
    HandlerRegistration addCancelUpdateHandler(CancelUpdateHandler handler);

    // The user wants to cancel the changes made to an item
    HandlerRegistration addRequestUpdateHandler(RequestUpdateHandler handler);

    // The Presenter has a seperate view for creating/updating domain object
    class UpdateEvent extends GwtEvent<UpdateHandler> {
        public static final Type TYPE = new Type<UpdateHandler>();

        @Override
        public Type<UpdateHandler> getAssociatedType() {
            return TYPE;
        }

        @Override
        protected void dispatch(UpdateHandler handler) {
            handler.onUpdate(this);
        }
    }

    // The Presenter has a seperate view for creating/updating domain object
    class CancelUpdateEvent extends GwtEvent<CancelUpdateHandler> {
        public static final Type TYPE = new Type<CancelUpdateHandler>();

        @Override
        public Type<CancelUpdateHandler> getAssociatedType() {
            return TYPE;
        }

        @Override
        protected void dispatch(CancelUpdateHandler handler) {
            handler.onCancelUpdate(this);
        }
    }

    // The Presenter has a seperate view for creating/updating domain object
    class RequestUpdateEvent extends GwtEvent<RequestUpdateHandler> {
        public static final Type TYPE = new Type<RequestUpdateHandler>();

        @Override
        public Type<RequestUpdateHandler> getAssociatedType() {
            return TYPE;
        }

        @Override
        protected void dispatch(RequestUpdateHandler handler) {
            handler.onRequestUpdate(this);
        }
    }
}