/*
  Copyright (c) 2004-2019 by Jakob Schröter <js@camaya.net>
  This file is part of the gloox library. http://camaya.net/gloox

  This software is distributed under a license. The full license
  agreement can be found in the file LICENSE in this distribution.
  This software may not be copied, modified, sold or distributed
  other than expressed in the named license agreement.

  This software is distributed without any warranty.
*/


#ifndef DISCOHANDLER_H__
#define DISCOHANDLER_H__

#include "macros.h"
#include "disco.h"

#include <string>

namespace gloox
{

  class IQ;

  /**
   * @brief A virtual interface that enables objects to receive Service Discovery (@xep{0030}) events.
   *
   * A class implementing this interface can receive the results of sent disco queries.
   *
   * @author Jakob Schröter <js@camaya.net>
   */
  class GLOOX_API DiscoHandler
  {
    public:
      /**
       * Virtual Destructor.
       */
      virtual ~DiscoHandler() {}

      /**
       * Reimplement this function if you want to be notified about the result
       * of an disco#info query.
       * @param from The sender of the disco#info result.
       * @param info The Info.
       * @param context A context identifier.
       * @since 1.0
       */
      virtual void handleDiscoInfo( const JID& from, const Disco::Info& info, int context ) = 0;

      /**
       * Reimplement this function if you want to be notified about the result
       * of a disco#items query.
       * @param from The sender of the disco#items result.
       * @param items The Items.
       * @param context A context identifier.
       * @since 1.0
       */
      virtual void handleDiscoItems( const JID& from, const Disco::Items& items, int context ) = 0;

      /**
       * Reimplement this function to receive disco error notifications.
       * @param from The sender of the error result.
       * @param error The Error. May be 0.
       * @param context A context identifier.
       * @since 1.0
       */
      virtual void handleDiscoError( const JID& from, const Error* error, int context ) = 0;

      /**
       * Reimplement this function to receive notifications about incoming IQ
       * stanzas of type 'set' in the disco namespace.
       * @param iq The full IQ.
       * @return Returns @b true if the stanza was handled and answered, @b false otherwise.
       */
      virtual bool handleDiscoSet( const IQ& iq ) { (void)iq; return false; }

  };

}

#endif // DISCOHANDLER_H__
