ItemAuthoritySystem.java example

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Terasology-master
/*
 * Copyright 2013 MovingBlocks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.terasology.logic.inventory;

import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.EventPriority;
import org.terasology.entitySystem.event.ReceiveEvent;
import org.terasology.entitySystem.systems.BaseComponentSystem;
import org.terasology.entitySystem.systems.RegisterMode;
import org.terasology.entitySystem.systems.RegisterSystem;
import org.terasology.logic.common.ActivateEvent;
import org.terasology.registry.In;

@RegisterSystem(RegisterMode.AUTHORITY)
public class ItemAuthoritySystem extends BaseComponentSystem {
    @In
    private InventoryManager inventoryManager;

    @ReceiveEvent(components = ItemComponent.class, priority = EventPriority.PRIORITY_TRIVIAL)
    public void usedItem(ActivateEvent event, EntityRef item) {
        ItemComponent itemComp = item.getComponent(ItemComponent.class);
        if (itemComp.consumedOnUse) {
            int slot = InventoryUtils.getSlotWithItem(event.getInstigator(), item);
            inventoryManager.removeItem(event.getInstigator(), event.getInstigator(), slot, true, 1);
        }
    }
}