/*

   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;

    }

}