PopupNotificationPreferences.java

package au.gov.ga.earthsci.notification.popup.preferences;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.eclipse.e4.core.di.annotations.Creatable;
import org.eclipse.e4.core.di.extensions.Preference;

import au.gov.ga.earthsci.notification.INotification;
import au.gov.ga.earthsci.notification.NotificationCategory;
import au.gov.ga.earthsci.notification.NotificationLevel;

/**
 * Default implementation of the {@link IPopupNotificationPreferences} interface
 * that binds to preferences via the Eclipse preference mechanism
 * 
 * @author James Navin (james.navin@ga.gov.au)
 */
@Creatable
@Singleton
public class PopupNotificationPreferences implements IPopupNotificationPreferences
{

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = ENABLE_POPUPS)
	private boolean enabled;

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = SHOW_INFO_NOTIFICATIONS)
	private boolean infoEnabled;

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = SHOW_WARNING_NOTIFICATIONS)
	private boolean warningEnabled;

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = SHOW_ERROR_NOTIFICATIONS)
	private boolean errorEnabled;

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = POPUP_DURATION)
	private int displayDuration;

	@Inject
	@Preference(nodePath = QUALIFIER_ID, value = CATEGORY_FILTER)
	private String enabledCategories;

	@Override
	public boolean isEnabled()
	{
		return enabled;
	}

	@Override
	public boolean shouldShow(INotification notification)
	{
		if (!enabled || notification == null)
		{
			return false;
		}

		if (!enabledFor(notification.getLevel()))
		{
			return false;
		}

		return enabledFor(notification.getCategory());

	}

	private boolean enabledFor(NotificationLevel level)
	{
		switch (level)
		{
		case INFORMATION:
		{
			return enabled && infoEnabled;
		}
		case WARNING:
		{
			return enabled && warningEnabled;
		}
		case ERROR:
		{
			return enabled && errorEnabled;
		}
		}
		return false;
	}

	private boolean enabledFor(NotificationCategory category)
	{
		return enabledCategories == null || enabledCategories.isEmpty() || enabledCategories.contains(category.getId());
	}

	@Override
	public int getDisplayDuration()
	{
		return displayDuration;
	}

}