//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.IO;
using Microsoft.Exchange.WebServices.Data;

namespace Spludlow
{
	/// <summary>
	/// EWS - Simple TraceListener to grab XML that's passed around
	/// </summary>
	public class ExchangeTraceListener : ITraceListener
	{
		public ExchangeTraceListener()
		{
			this.Reset();
		}

		public List<string> Results;

		public void Reset()
		{
			this.Results = new List<string>();
		}

		public string[] Read()
		{
			return this.Results.ToArray();
		}

		public void Trace(string traceType, string traceMessage)
		{
			this.Results.Add(this.CleanRecord(traceMessage));
		}

		private string CleanRecord(string input)
		{
			//	Seem some results that arn't enclosed in <Trace> (EWS Contacts with over 8K results) didn't contain any CR also. Avoid large datasets !!!

			if (input.StartsWith("<Trace") == false)
				return input;

			StringBuilder result = new StringBuilder();

			using (StringReader reader = new StringReader(input))
			{
				reader.ReadLine();
				result.AppendLine(reader.ReadLine().Trim());

				string line;
				while ((line = reader.ReadLine()) != null)
				{
					if (line == "</Trace>")
						break;

					result.AppendLine(line);
				}
			}

			return result.ToString();
		}
	}
}