/*      net_msgs.java
        Copyright 1998 Kyle R. Burton

This is free software; you can redistribute it and/or modify
it under the tearms of the GNU General Public License as published by 
the Free Software Foundation; either version 2, or (at your option)
any later version.

This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this software; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/**
 * 
 * file: net_msgs.java
 *
 * description:  utility class for getting message text from a URL.  One of the 
 *   purposes of this is to remove language specific elements from Java applications.
 *
 * revision list:
 *  Thu Apr 30 09:23:32 EDT 1998 KRB - created file.
 *
 */
import java.util.*;
import java.net.*;
import java.io.*;


public class net_msgs extends Hashtable {
  public boolean show_diagnostics = false;
  String msg_url = null;

  public net_msgs() {
    super();
  }

  public net_msgs( String msg_url )
    throws MalformedURLException, IOException {
    super();
    init_from_url(msg_url);
  }

  public boolean init_from_url( String msg_url ) 
    throws MalformedURLException, IOException  {
    this.msg_url = new String(msg_url);
    return init_from_url(new URL(msg_url));
  }

  public String get_msg_url() {
    return new String(msg_url);
  }

  public Object get( Object key ) {
    return containsKey(key) ? super.get(key) : key;
  }

  public String get( String key ) {
    return containsKey(key) ? (String) super.get(key) : key;
  }

  public boolean init_from_url( URL msg_url ) throws IOException {
    BufferedReader br = new BufferedReader( new InputStreamReader(msg_url.openStream()) );
    return init(br);
  }

  public boolean init( BufferedReader br ) throws IOException {
    StreamTokenizer stok = new StreamTokenizer(br);
    stok.commentChar('#');
    stok.eolIsSignificant(true);
    stok.quoteChar('"');
    stok.wordChars('_','_');

    int type;
    boolean more_tokens = true, got_key = false;
    String key = new String();
    String value = new String();
    while( more_tokens ) {
      type = stok.nextToken();

      if( show_diagnostics ) {
        System.out.println("net_msgs::init_from_url(URL) parsed token: " + stok.toString() );
      }

      switch( type ) {
        case StreamTokenizer.TT_EOF:
          if( show_diagnostics ) {
            System.out.println("net_msgs::init_from_url(URL) type is TT_EOF." );
          }
	  more_tokens = false;
	  break;
	case StreamTokenizer.TT_EOL:
          if( show_diagnostics ) {
            System.out.println("net_msgs::init_from_url(URL) type is TT_EOL." );
          }
	  got_key = false;
	  break;
	case StreamTokenizer.TT_NUMBER:
	case StreamTokenizer.TT_WORD:
	  value = stok.sval;
	  if( StreamTokenizer.TT_NUMBER == stok.ttype ) {
            if( show_diagnostics ) {
              System.out.println("net_msgs::init_from_url(URL) type is TT_NUMBER." );
            }
	    value = java.lang.Double.toString(stok.nval);
	  }
	  else {
            if( show_diagnostics ) {
              System.out.println("net_msgs::init_from_url(URL) type is TT_WORD." );
            }
	  }

	  if( null == value ) {
	    break;
	  }

	  if( got_key ) {
	    got_key = false;
	    if( show_diagnostics ) {
	      System.out.println("net_msgs::init() setting: " + key + " = " + value );
	    }
	    if( null != key && null != value ) {
	      put(key,value);
	    }
	  }
	  else {
	    key = value;
	    got_key = true;
	  }
	  break;
	default: 
	  // unknown type...ther's probably a quoted string in sval
          if( show_diagnostics ) {
            System.out.println("net_msgs::init_from_url(URL) type is indeterminate." );
          }
	  if( got_key ) {
	    got_key = false;
	    if( show_diagnostics ) {
	      System.out.println("net_msgs::init() setting: " + key + " = " + stok.sval );
	    }

	    if( null != key && null != stok.sval ) {
	      put(key,stok.sval);
	    }
	  }
	  else {
	    key = stok.sval;
	    got_key = true;
	  }
	  break;
      }
    }

    return true;
  }
}