/*******************************************************************************
 * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *  
 *  This program and the accompanying materials are made available under the
 *  terms of the Eclipse Public License v1.0 which accompanies this distribution,
 *  and is available at http://www.eclipse.org/legal/epl-v10.html
 *  
 *******************************************************************************/
package com.cisco.yangide.editor.dialogs;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.DialogPage;
import org.eclipse.jface.dialogs.IMessageProvider;

/**
 * A utility class to work with IStatus.
 * 
 * @author Alexey Kholupko
 */
public class StatusUtil {

    /**
     * Compares two instances of <code>IStatus</code>. The more severe is returned: An error is more
     * severe than a warning, and a warning is more severe than ok. If the two statuses have the
     * same severity, the second is returned.
     */
    public static IStatus getMoreSevere(IStatus s1, IStatus s2) {
        if (s1.getSeverity() > s2.getSeverity()) {
            return s1;
        } else {
            return s2;
        }
    }

    /**
     * Finds the most severe status from a array of statuses. An error is more severe than a
     * warning, and a warning is more severe than ok.
     */
    public static IStatus getMostSevere(IStatus[] status) {
        IStatus max = null;
        for (int i = 0; i < status.length; i++) {
            IStatus curr = status[i];
            if (curr.matches(IStatus.ERROR)) {
                return curr;
            }
            if (max == null || curr.getSeverity() > max.getSeverity()) {
                max = curr;
            }
        }
        return max;
    }

    /**
     * Applies the status to the status line of a dialog page.
     */
    public static void applyToStatusLine(DialogPage page, IStatus status) {
        String message = status.getMessage();
        if (message != null && message.length() == 0) {
            message = null;
        }
        switch (status.getSeverity()) {
        case IStatus.OK:
            page.setMessage(message, IMessageProvider.NONE);
            page.setErrorMessage(null);
            break;
        case IStatus.WARNING:
            page.setMessage(message, IMessageProvider.WARNING);
            page.setErrorMessage(null);
            break;
        case IStatus.INFO:
            page.setMessage(message, IMessageProvider.INFORMATION);
            page.setErrorMessage(null);
            break;
        default:
            page.setMessage(null);
            page.setErrorMessage(message);
            break;
        }
    }
}