/*
* Copyright 2008 ZXing authors
*
* Licensed 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.
*/

using System;

namespace ZXing.Client.Result
{
    /// <summary> Parses strings of digits that represent a ISBN.
    /// 
    /// </summary>
    /// <author>  jbreiden@google.com (Jeff Breidenbach)
    /// </author>
    /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source 
    /// </author>
    public class ISBNResultParser : ResultParser
    {
        /// <summary>
        /// See <a href="http://www.bisg.org/isbn-13/for.dummies.html">ISBN-13 For Dummies</a>
        /// </summary>
        /// <param name="result">The result.</param>
        /// <returns></returns>
        override public ParsedResult parse(ZXing.Result result)
        {
            BarcodeFormat format = result.BarcodeFormat;
            if (format != BarcodeFormat.EAN_13)
            {
                return null;
            }
            String rawText = result.Text;
            int length = rawText.Length;
            if (length != 13)
            {
                return null;
            }
            if (!rawText.StartsWith("978") && !rawText.StartsWith("979"))
            {
                return null;
            }

            return new ISBNParsedResult(rawText);
        }
    }
}