/*

* 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;

using Result = com.google.zxing.Result;

namespace com.google.zxing.client.result

{

	

	/// <summary> <p>Parses an "sms:" URI result, which specifies a number to SMS and optional

	/// "via" number. See <a href="http://gbiv.com/protocols/uri/drafts/draft-antti-gsm-sms-url-04.txt">

	/// the IETF draft</a> on this.</p>

	/// 

	/// <p>This actually also parses URIs starting with "mms:", "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>

	/// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source 

	/// </author>

	sealed class SMSMMSResultParser:ResultParser

	{

		

		private SMSMMSResultParser()

		{

		}

		

		public static SMSParsedResult parse(Result result)

		{

			System.String rawText = result.Text;

			if (rawText == null)

			{

				return null;

			}

			int prefixLength;

			if (rawText.StartsWith("sms:") || rawText.StartsWith("SMS:") || rawText.StartsWith("mms:") || rawText.StartsWith("MMS:"))

			{

				prefixLength = 4;

			}

			else if (rawText.StartsWith("smsto:") || rawText.StartsWith("SMSTO:") || rawText.StartsWith("mmsto:") || rawText.StartsWith("MMSTO:"))

			{

				prefixLength = 6;

			}

			else

			{

				return null;

			}

			

			// Check up front if this is a URI syntax string with query arguments

			System.Collections.Hashtable nameValuePairs = parseNameValuePairs(rawText);

			System.String subject = null;

			System.String body = null;

			bool querySyntax = false;

			if (nameValuePairs != null && !(nameValuePairs.Count == 0))

			{

				subject = ((System.String) nameValuePairs["subject"]);

				body = ((System.String) nameValuePairs["body"]);

				querySyntax = true;

			}

			

			// Drop sms, query portion

			//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 queryStart = rawText.IndexOf('?', prefixLength);

			System.String smsURIWithoutQuery;

			// If it's not query syntax, the question mark is part of the subject or message

			if (queryStart < 0 || !querySyntax)

			{

				smsURIWithoutQuery = rawText.Substring(prefixLength);

			}

			else

			{

				smsURIWithoutQuery = rawText.Substring(prefixLength, (queryStart) - (prefixLength));

			}

			int numberEnd = smsURIWithoutQuery.IndexOf(';');

			System.String number;

			System.String via;

			if (numberEnd < 0)

			{

				number = smsURIWithoutQuery;

				via = null;

			}

			else

			{

				number = smsURIWithoutQuery.Substring(0, (numberEnd) - (0));

				System.String maybeVia = smsURIWithoutQuery.Substring(numberEnd + 1);

				if (maybeVia.StartsWith("via="))

				{

					via = maybeVia.Substring(4);

				}

				else

				{

					via = null;

				}

			}

			

			// Thanks to dominik.wild for suggesting this enhancement to support

			// smsto:number:body URIs

			if (body == null)

			{

				int bodyStart = number.IndexOf(':');

				if (bodyStart >= 0)

				{

					body = number.Substring(bodyStart + 1);

					number = number.Substring(0, (bodyStart) - (0));

				}

			}

			return new SMSParsedResult("sms:" + number, number, via, subject, body, null);

		}

	}

}