/*

   Simple .RDP file parser

   Copyright 2013 Blaz Bacnik

   This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.

   If a copy of the MPL was not distributed with this file, You can obtain one at

   http://mozilla.org/MPL/2.0/.

*/

package com.freerdp.freerdpcore.utils;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.HashMap;

import java.util.Locale;

public class RDPFileParser

{

	private static final int MAX_ERRORS = 20;

	private static final int MAX_LINES = 500;

	private HashMap<String, Object> options;

	public RDPFileParser()

	{

		init();

	}

	public RDPFileParser(String filename) throws IOException

	{

		init();

		parse(filename);

	}

	private void init()

	{

		options = new HashMap<String, Object>();

	}

	public void parse(String filename) throws IOException

	{

		BufferedReader br = new BufferedReader(new FileReader(filename));

		String line = null;

		int errors = 0;

		int lines = 0;

		boolean ok;

		while ((line = br.readLine()) != null)

		{

			lines++;

			ok = false;

			if (errors > MAX_ERRORS || lines > MAX_LINES)

			{

				br.close();

				throw new IOException("Parsing limits exceeded");

			}

			String[] fields = line.split(":", 3);

			if (fields.length == 3)

			{

				if (fields[1].equals("s"))

				{

					options.put(fields[0].toLowerCase(Locale.ENGLISH), fields[2]);

					ok = true;

				}

				else if (fields[1].equals("i"))

				{

					try

					{

						Integer i = Integer.parseInt(fields[2]);

						options.put(fields[0].toLowerCase(Locale.ENGLISH), i);

						ok = true;

					}

					catch (NumberFormatException e)

					{

					}

				}

				else if (fields[1].equals("b"))

				{

					ok = true;

				}

			}

			if (!ok)

				errors++;

		}

		br.close();

	}

	public String getString(String optionName)

	{

		if (options.get(optionName) instanceof String)

			return (String)options.get(optionName);

		else

			return null;

	}

	public Integer getInteger(String optionName)

	{

		if (options.get(optionName) instanceof Integer)

			return (Integer)options.get(optionName);

		else

			return null;

	}

}