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/*
 *   Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you 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.apache.james.managesieve.util;

import org.apache.james.managesieve.api.ArgumentException;

public class ParserUtils {

    public static long getSize(String args) throws ArgumentException {
        if (args != null && args.length() > 3
            && args.charAt(0) == '{'
            && args.charAt(args.length() - 1) == '}'
            && args.charAt(args.length() - 2) == '+') {
            try {
                return Long.parseLong(args.substring(1, args.length() - 2));
            } catch (NumberFormatException e) {
                throw new ArgumentException("Size is not a long : " + e.getMessage(), e);
            }
        }
        throw new ArgumentException(args + " is an invalid size literal : it should be at least 4 char looking like {_+}");
    }

    public static String unquote(String quoted) {
        String result = quoted;
        if (quoted != null) {
            if (quoted.startsWith("\"") && quoted.endsWith("\"")) {
                result = quoted.substring(1, quoted.length() - 1);
            } else if (quoted.startsWith("'") && quoted.endsWith("'")) {
                result = quoted.substring(1, quoted.length() - 1);
            }
        }
        return result;
    }

}