/*
* Copyright 2007 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 the "URLTO" result format, which is of the form "URLTO:[title]:[url]".
    /// This seems to be used sometimes, but I am not able to find documentation
    /// on its origin or official format?
    /// 
    /// </summary>
    /// <author>  Sean Owen
    /// </author>
    /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source 
    /// </author>
    sealed class URLTOResultParser : ResultParser
    {
        override public ParsedResult parse(ZXing.Result result)
        {
            var rawText = result.Text;
            if (rawText == null ||
               (!rawText.StartsWith("urlto:") && !rawText.StartsWith("URLTO:")))
            {
                return null;
            }
            //UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"
            int titleEnd = rawText.IndexOf(':', 6);
            if (titleEnd < 0)
            {
                return null;
            }
            var title = titleEnd <= 6 ? null : rawText.Substring(6, (titleEnd) - (6));
            var uri = rawText.Substring(titleEnd + 1);
            return new URIParsedResult(uri, title);
        }
    }
}