package com.onaro.sanscreen.client.view.changes;

import com.onaro.sanscreen.types.ChangeType;
import com.onaro.util.SetUtil;

import java.util.Set;

/**
 * A filter for devices up/down changes.
 */
public class TypeFilterDeviceUpDown implements TypeFilter {
    /**
     * The set of types that defines up/down changes.
     */
    public final static Set<ChangeType> ACCEPTED_CHANGE_TYPES = SetUtil.setOf(
            ChangeType.DEVICE_UP, 
            ChangeType.DEVICE_DOWN, 
            ChangeType.DEVICE_CREATED,
            ChangeType.TOO_MANY_CHANGES);

    /**
     * Tests if a change-group is for a device up/down change.
     * @param changeGroup the change-group
     * @return true if this change is a device up/down
     */
    public boolean shouldBeDisplayed(ChangeGroup changeGroup) {
        return ACCEPTED_CHANGE_TYPES.contains(changeGroup.getType());
    }
}