/*
* 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);
      }
   }
}