package org.rpi.radio.parsers;
   
   import java.io.BufferedReader;
   import java.io.IOException;
   import java.io.InputStreamReader;
   import java.net.MalformedURLException;
   import java.net.URL;
   import java.net.URLConnection;
   import java.util.LinkedList;
  
  import org.apache.log4j.Logger;
  
  public class ASXParser {
  	
  	private Logger log = Logger.getLogger(ASXParser.class);
  	
  	public LinkedList<String> getStreamingUrl(String url) {
  		LinkedList<String> murls = null;
  		try {
  			return getStreamingUrl(getConnection(url));
  		} catch (MalformedURLException e) {
  			log.error(e);
  		} catch (IOException e) {
  			log.error(e);
  		}
  		return murls;
  	}
  
  	public LinkedList<String> getStreamingUrl(URLConnection conn) {		
  		
  		final BufferedReader br;
  		String murl = null;
  		LinkedList<String> murls = null;
  		murls = new LinkedList<String>();
  		try {
  			br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
  			
  			while (true) {
  				try {
  					String line = br.readLine();
  					if (line == null) {
  						break;
  					}
  					murl = parseLine(line);
  					if (murl != null && !murl.equals("")) {
  						murls.add(murl);
  					}
  				} catch (IOException e) {
  					log.error(e);
  				}
  			}
  		} catch (MalformedURLException e) {
  			log.error(e);
  		} catch (IOException e) {
  			log.error(e);
  		}
  		//murls.add(conn.getURL().toString());
  		return murls;
  	}
  
  	private String parseLine(String line) {
  		if (line == null) {
  			return null;
  		}
  		String trimmed = line.trim();
  		if (trimmed.toLowerCase().startsWith("<ref href=\"")) {
  			trimmed = trimmed.substring(11);
  			//trimmed = trimmed.replace("<ref href=\"", "");
  			trimmed = trimmed.replace("/>", "").trim();
  			if (trimmed.endsWith("\"")) {
  				trimmed = trimmed.replace("\"", "");
  				log.debug("ASX: " + trimmed);
  				return trimmed;
  			}
  		}
  		return "";
  	}
  	
  	private URLConnection getConnection(String url) throws MalformedURLException, IOException
  	{
  		URLConnection mUrl = new URL(url).openConnection();
  		return mUrl;
  	}
  
  }