/**

 * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.wrttools.util;

public final class Util {

    public static String removeSpaces(String widgetName) {

        return widgetName != null ? widgetName.replace(" ", "") : "";

    }

    /* Validation tests for both Windows & Mac OS */

    private static String commonValidate(String argName) {

        if (argName.length() == 0) {

            return ("Can not be empty");

        }

        // filenames starting with dot are not valid for both Widget name & UID

        if (argName.charAt(0) == '.') {

            return ("Can not begin with a dot");

        }

        final char lastChar = argName.charAt(argName.length() - 1);

        // filenames ending in dot are not valid for both Widget name & UID

        if (lastChar == '.') {

            return ("Can not end with dot");

        }

        return null;

    }

    public static String validateWidgetName(String widgetName) {

        String strError = null;

        if ((strError = commonValidate(widgetName)) != null) {

            return "Invalid Widget name. " + strError;

        }

        if (widgetName.indexOf("<") > -1 || widgetName.indexOf(">") > -1) {

            return ("Invalid Widget name. Angle brackets are not allowed");

        }

        final char lastChar = widgetName.charAt(widgetName.length() - 1);

        // trailing or beginning space is not valid in filenames for Widget name

        if ((Character.isWhitespace(widgetName.charAt(0)) || Character.isWhitespace(lastChar))) {

            return ("Invalid Widget name. Beginning or trailing spaces are not allowed");

        }

        if (widgetName.indexOf('\n') != -1 || widgetName.indexOf('\t') != -1) {

            return ("Invalid Widget name. newline character is not allowed");

        }

        return null;

    }

    public static String validateWidgetID(String widgetID) {

        String strError = null;

        if ((strError = commonValidate(widgetID)) != null) {

            return "Invalid Widget identifier. " + strError;

        }

        // file names with white spaces are not allowed for Widget Identifier

        // (UID)

        if (widgetID.indexOf(" ") > -1) {

            return ("Invalid Widget identifier. Whitespaces are not allowed");

        }

        if (widgetID.length() > 78) {

            return ("Invalid Widget identifier. Maximum string length exceeded");

        }

        /* test invalid characters, allows only alphanumeric and '.' for UID */

        for (int i = 0; i < widgetID.length(); i++) {

            if (alphnum.indexOf(widgetID.charAt(i), 0) == -1) {

                return ("Invalid Widget identifier. Only alphanumeric or '.' is allowed");

            }

        }

        if (widgetID.matches(".*[.]{2,}.*")) {

            return ("Invalid Widget identifier. Consecutive dots are not allowed");

        }

        return null;

    }

    private Util() {

        // Do not instantiate

    }

}