/*
 * 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>
    /// <p>Parses an "smsto:" URI result, whose format is not standardized but appears to be like:
    /// {@code smsto:number(:body)}.</p>
    /// <p>This actually also parses URIs starting with "smsto:", "mmsto:", "SMSTO:", and
    /// "MMSTO:", and treats them all the same way, and effectively converts them to an "sms:" URI
    /// for purposes of forwarding to the platform.</p>
    /// </summary>
    /// <author>Sean Owen</author>
    public class SMSTOMMSTOResultParser : ResultParser
    {
        /// <summary>
        /// attempt to parse the raw result to the specific type
        /// </summary>
        /// <param name="result"></param>
        /// <returns></returns>
        public override ParsedResult parse(ZXing.Result result)
        {
            String rawText = result.Text;
            if (!(rawText.StartsWith("smsto:") || rawText.StartsWith("SMSTO:") ||
                  rawText.StartsWith("mmsto:") || rawText.StartsWith("MMSTO:")))
            {
                return null;
            }
            // Thanks to dominik.wild for suggesting this enhancement to support
            // smsto:number:body URIs
            String number = rawText.Substring(6);
            String body = null;
            int bodyStart = number.IndexOf(':');
            if (bodyStart >= 0)
            {
                body = number.Substring(bodyStart + 1);
                number = number.Substring(0, bodyStart);
            }
            return new SMSParsedResult(number, null, null, body);
        }
    }
}