// HttpCookieList.java
// $Id: HttpCookieList.java,v 1.4 1997/06/30 12:49:17 bmahe Exp $
// (c) COPYRIGHT MIT and INRIA, 1996.
// Please first read the full copyright statement in file COPYRIGHT.html

package w3c.www.http;

import java.util.*;

public class HttpCookieList extends BasicValue {
  Vector cookies = null;

  protected void updateByteValue() {
    HttpBuffer buf = new HttpBuffer();
    // Dump all cookies:
    int sz = cookies.size();
    for (int i = 0 ; i < sz ; i++) {
      HttpCookie c = (HttpCookie) cookies.elementAt(i);
      if ( i == 0 ) {
	// We use the first cookie version here:
	buf.append("$Version", (byte) '=', c.getVersion());
	buf.append((byte) ';');
      }
      // Dump the cookie values:
      buf.append(c.getName(), (byte) '=', c.getValue());
      //      buf.append((byte) ';');
      String s = c.getPath();
      if ( s != null ) {
	buf.append((byte) ';');
	buf.append("$Path", (byte) '=', s);
      }
      if ((s = c.getDomain()) != null) {
	buf.append((byte) ';');
	buf.append("$Domain", (byte) '=', s);
      }
    }
    raw  = buf.getByteCopy();
    roff = 0;
    rlen = raw.length;
  }

  protected void parse()
    throws HttpParserException
  {
    // Requires a small twist, but:
    ParseState cv = new ParseState(roff, rlen);
    ParseState it = new ParseState(0, 0);
    ParseState val = new ParseState(0, 0);
    cv.separator = (byte) ';';
    cv.spaceIsSep = false;
    it.separator = (byte) '=';
    val.separator = (byte) ';';
    val.spaceIsSep = false;
    
    // We will get only one cokoie for the time being:
    HttpCookie c = new HttpCookie();
    while ( HttpParser.nextItem(raw, cv) >= 0 ) {
      it.ioff   = cv.start;
      it.bufend = cv.end;
      //      HttpCookie c = new HttpCookie();
      if ( HttpParser.nextItem(raw, it) < 0 )
	error("Invalid item in cookie value.");
      String item = it.toString(raw, true);
      // Get the item's value:
      it.prepare();
      if ( HttpParser.nextItem(raw, it) < 0 )
	error("Cookie item ["+item+"] has no value.");
      if ( item.equals("$path") ) {
	c.setPath(it.toString(raw));
      } else if ( item.equals("$domain") ) {
	c.setDomain(it.toString(raw));
      } else if ( item.equals("$version") ) {
	c.setVersion(Integer.parseInt(it.toString(raw)));
	//	c.setVersion(HttpParser.parseInt(raw, it));
      } else {
	if ( c.getName() != null )
	  error("Invalid cookie item ["+item+"]");
	c.setName(item);
	val.ioff = it.start;
	val.bufend = cv.end;
	HttpParser.nextItem(raw, val);
	c.setValue(it.toString(raw));
      }
      cv.prepare();
    }
    cookies.addElement(c);
  }

  /**
   * Get this HTTP value, parsed value.
   */

  public Object getValue() {
    return this;
  }

  /**
   * Add a cookie to this header value.
   * @param name The name of the cookie to add.
   * @param value It's value.
   * @return A HttpCookie instance, tha represents this cookie in the header
   * value.
   */

  public HttpCookie addCookie(String name, String value) {
    validate();
    HttpCookie c = new HttpCookie(true, name, value);
    cookies.addElement(c);
    return c;
  }

  /**
   * Remove a cookie from this header value.
   * @param name The name of the cookie to remove.
   * @return A boolean, <strong>true</strong> If the cookie was found, and
   * removed, <strong>false</strong> otherwise.
   */

  public boolean removeCookie(String name) {
    validate();
    int sz = cookies.size();
    for (int i = 0 ; i < sz ; i++) {
      HttpCookie c = (HttpCookie) cookies.elementAt(i);
      if ( c.getName().equals(name) ) {
	cookies.removeElementAt(i);
	return true;
      }
    }
    return false;
  }

  /**
   * Lookup a cookie by name.
   * @param name The name of the cooie to lookup.
   * @return A HttpCookie instance, or <strong>null</strong> if not found.
   */

  public HttpCookie getCookie(String name) {
    validate();
    int sz = cookies.size();
    for (int i = 0 ; i < sz ; i++) {
      HttpCookie c = (HttpCookie) cookies.elementAt(i);
      if ( c.getName().equals(name) )
	return c;
    }
    return null;
  }

  public HttpCookie[] getCookies() {
    validate();
    HttpCookie cooks [] = new HttpCookie[cookies.size()];
    cookies.copyInto(cooks);
    return cooks;
  }

  HttpCookieList(HttpCookie c[]) {
    this.isValid = true;
    this.cookies = new Vector(8);
    if ( c != null ) {
      // FIXME Don't tell me this is broken, I *know* it
      for (int i = 0 ; i < c.length ; i++)
	cookies.addElement(c[i]);
    }
  }

  public HttpCookieList() {
    this.isValid = false;
    this.cookies = new Vector(2);
  }

}
