/**
* Copyright (c) 2012, Andy Janata
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.socialgamer.cah.handlers;
import java.util.Map;
import javax.servlet.http.HttpSession;
import net.socialgamer.cah.Constants.AjaxRequest;
import net.socialgamer.cah.Constants.ErrorCode;
import net.socialgamer.cah.Constants.ReturnableData;
import net.socialgamer.cah.Constants.SessionAttribute;
import net.socialgamer.cah.RequestWrapper;
import net.socialgamer.cah.data.Game;
import net.socialgamer.cah.data.GameManager;
import net.socialgamer.cah.data.User;
/**
* Handler superclass for handlers that require a game. This finds the game and makes sure it's
* valid and specified.
*
* @author Andy Janata (ajanata@socialgamer.net)
*/
public abstract class GameHandler extends Handler {
protected GameManager gameManager;
public GameHandler(final GameManager gameManager) {
this.gameManager = gameManager;
}
@Override
public Map<ReturnableData, Object> handle(final RequestWrapper request, final HttpSession session) {
final User user = (User) session.getAttribute(SessionAttribute.USER);
assert (user != null);
final int gameId;
if (request.getParameter(AjaxRequest.GAME_ID) == null) {
return error(ErrorCode.NO_GAME_SPECIFIED);
}
try {
gameId = Integer.parseInt(request.getParameter(AjaxRequest.GAME_ID));
} catch (final NumberFormatException nfe) {
return error(ErrorCode.INVALID_GAME);
}
final Game game = gameManager.getGame(gameId);
if (game == null) {
return error(ErrorCode.INVALID_GAME);
}
assert game.getId() == gameId : "Got a game with id not what we asked for.";
return handle(request, session, user, game);
}
/**
* Handle a client request. The {@code Game} is guaranteed to be valid.
*
* @param request
* The request data.
* @param session
* The client's session.
* @param user
* The client's {@code User}.
* @param game
* The {@code Game} for this request.
* @return Response data.
*/
public abstract Map<ReturnableData, Object> handle(final RequestWrapper request,
final HttpSession session, final User user, final Game game);
}