/*
 * File   : $Source: /usr/local/cvs/opencms/src/org/opencms/webdav/CmsWebdavStatus.java,v $
 * Date   : $Date: 2008-02-27 12:05:30 $
 * Version: $Revision: 1.6 $
 *
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) 2002 - 2008 Alkacon Software GmbH (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software GmbH, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * This file is based on:
 * - org.apache.catalina.servlets.WebdavServlet/WebdavStatus
 * from the Apache Tomcat project.
 * 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.opencms.webdav;

import java.util.Hashtable;

import javax.servlet.http.HttpServletResponse;

/**
 * Contains all possible return values for the WebDAV/HTTP protocol.<p>
 *
 * @author Marc Eaddy
 * @author Peter Bonrad
 * 
 * @version $Revision: 1.6 $
 * 
 * @since 6.5.6
 */
public final class CmsWebdavStatus {

    /**
     * Status code (202) indicating that a request was accepted for
     * processing, but was not completed.
     */
    public static final int SC_ACCEPTED = HttpServletResponse.SC_ACCEPTED;

    /**
     * Status code (502) indicating that the HTTP server received an
     * invalid response from a server it consulted when acting as a
     * proxy or gateway.
     */
    public static final int SC_BAD_GATEWAY = HttpServletResponse.SC_BAD_GATEWAY;

    /**
     * Status code (400) indicating the request sent by the client was
     * syntactically incorrect.
     */
    public static final int SC_BAD_REQUEST = HttpServletResponse.SC_BAD_REQUEST;

    /**
     * Status code (409) indicating that the request could not be
     * completed due to a conflict with the current state of the
     * resource.
     */
    public static final int SC_CONFLICT = 409;

    /**
     * Status code (100) indicating the client may continue with
     * its request.  This interim response is used to inform the
     * client that the initial part of the request has been
     * received and has not yet been rejected by the server.
     */
    public static final int SC_CONTINUE = 100;

    /**
     * Status code (201) indicating the request succeeded and created
     * a new resource on the server.
     */
    public static final int SC_CREATED = HttpServletResponse.SC_CREATED;

    /**
     * Status code (403) indicating the server understood the request
     * but refused to fulfill it.
     */
    public static final int SC_FORBIDDEN = HttpServletResponse.SC_FORBIDDEN;

    /**
     * Status code (419) indicating that the resource does not have
     * sufficient space to record the state of the resource after the
     * execution of this method.
     */
    public static final int SC_INSUFFICIENT_SPACE_ON_RESOURCE = 419;
    // This one colides with HTTP 1.1
    // "419 Proxy Reauthentication Required"

    /**
     * Status code (500) indicating an error inside the HTTP service
     * which prevented it from fulfilling the request.
     */
    public static final int SC_INTERNAL_SERVER_ERROR = HttpServletResponse.SC_INTERNAL_SERVER_ERROR;

    /**
     * Status code (423) indicating the destination resource of a
     * method is locked, and either the request did not contain a
     * valid Lock-Info header, or the Lock-Info header identifies
     * a lock held by another principal.
     */
    public static final int SC_LOCKED = 423;

    /**
     * Status code (420) indicating the method was not executed on
     * a particular resource within its scope because some part of
     * the method's execution failed causing the entire method to be
     * aborted.
     */
    public static final int SC_METHOD_FAILURE = 420;

    /**
     * Status code (405) indicating the method specified is not
     * allowed for the resource.
     */
    public static final int SC_METHOD_NOT_ALLOWED = 405;

    /**
     * Status code (301) indicating that the resource has permanently
     * moved to a new location, and that future references should use a
     * new URI with their requests.
     */
    public static final int SC_MOVED_PERMANENTLY = HttpServletResponse.SC_MOVED_PERMANENTLY;

    /**
     * Status code (302) indicating that the resource has temporarily
     * moved to another location, but that future references should
     * still use the original URI to access the resource.
     */
    public static final int SC_MOVED_TEMPORARILY = HttpServletResponse.SC_MOVED_TEMPORARILY;

    /**
     * Status code (207) indicating that the response requires
     * providing status for multiple independent operations.
     */
    public static final int SC_MULTI_STATUS = 207;
    // This one colides with HTTP 1.1
    // "207 Parital Update OK"

    /**
     * Status code (204) indicating that the request succeeded but that
     * there was no new information to return.
     */
    public static final int SC_NO_CONTENT = HttpServletResponse.SC_NO_CONTENT;

    /**
     * Status code (404) indicating that the requested resource is not
     * available.
     */
    public static final int SC_NOT_FOUND = HttpServletResponse.SC_NOT_FOUND;

    /**
     * Status code (501) indicating the HTTP service does not support
     * the functionality needed to fulfill the request.
     */
    public static final int SC_NOT_IMPLEMENTED = HttpServletResponse.SC_NOT_IMPLEMENTED;

    /**
     * Status code (304) indicating that a conditional GET operation
     * found that the resource was available and not modified.
     */
    public static final int SC_NOT_MODIFIED = HttpServletResponse.SC_NOT_MODIFIED;

    /**
     * Status code (200) indicating the request succeeded normally.
     */
    public static final int SC_OK = HttpServletResponse.SC_OK;

    /**
     * Status code (412) indicating the precondition given in one
     * or more of the request-header fields evaluated to false
     * when it was tested on the server.
     */
    public static final int SC_PRECONDITION_FAILED = 412;

    /**
     * Status code (413) indicating the server is refusing to
     * process a request because the request entity is larger
     * than the server is willing or able to process.
     */
    public static final int SC_REQUEST_TOO_LONG = 413;

    /**
     * Status code (503) indicating that the HTTP service is
     * temporarily overloaded, and unable to handle the request.
     */
    public static final int SC_SERVICE_UNAVAILABLE = HttpServletResponse.SC_SERVICE_UNAVAILABLE;

    /**
     * Status code (401) indicating that the request requires HTTP
     * authentication.
     */
    public static final int SC_UNAUTHORIZED = HttpServletResponse.SC_UNAUTHORIZED;

    /**
     * Status code (418) indicating the entity body submitted with
     * the PATCH method was not understood by the resource.
     */
    public static final int SC_UNPROCESSABLE_ENTITY = 418;
    // This one colides with HTTP 1.1
    // "418 Reauthentication Required"

    /**
     * Status code (415) indicating the server is refusing to service
     * the request because the entity of the request is in a format
     * not supported by the requested resource for the requested
     * method.
     */
    public static final int SC_UNSUPPORTED_MEDIA_TYPE = 415;

    /**
     * This Hashtable contains the mapping of HTTP and WebDAV
     * status codes to descriptive text.  This is a static
     * variable.
     */
    private static Hashtable mapStatusCodes = new Hashtable();

    /**
     * Hide default constructor for utility class.
     *
     */
    private CmsWebdavStatus() {

        // noop
    }

    static {
        // HTTP 1.0 tatus Code
        addStatusCodeMap(SC_OK, "OK");
        addStatusCodeMap(SC_CREATED, "Created");
        addStatusCodeMap(SC_ACCEPTED, "Accepted");
        addStatusCodeMap(SC_NO_CONTENT, "No Content");
        addStatusCodeMap(SC_MOVED_PERMANENTLY, "Moved Permanently");
        addStatusCodeMap(SC_MOVED_TEMPORARILY, "Moved Temporarily");
        addStatusCodeMap(SC_NOT_MODIFIED, "Not Modified");
        addStatusCodeMap(SC_BAD_REQUEST, "Bad Request");
        addStatusCodeMap(SC_UNAUTHORIZED, "Unauthorized");
        addStatusCodeMap(SC_FORBIDDEN, "Forbidden");
        addStatusCodeMap(SC_NOT_FOUND, "Not Found");
        addStatusCodeMap(SC_INTERNAL_SERVER_ERROR, "Internal Server Error");
        addStatusCodeMap(SC_NOT_IMPLEMENTED, "Not Implemented");
        addStatusCodeMap(SC_BAD_GATEWAY, "Bad Gateway");
        addStatusCodeMap(SC_SERVICE_UNAVAILABLE, "Service Unavailable");
        addStatusCodeMap(SC_CONTINUE, "Continue");
        addStatusCodeMap(SC_METHOD_NOT_ALLOWED, "Method Not Allowed");
        addStatusCodeMap(SC_CONFLICT, "Conflict");
        addStatusCodeMap(SC_PRECONDITION_FAILED, "Precondition Failed");
        addStatusCodeMap(SC_REQUEST_TOO_LONG, "Request Too Long");
        addStatusCodeMap(SC_UNSUPPORTED_MEDIA_TYPE, "Unsupported Media Type");
        // WebDav Status Codes
        addStatusCodeMap(SC_MULTI_STATUS, "Multi-Status");
        addStatusCodeMap(SC_UNPROCESSABLE_ENTITY, "Unprocessable Entity");
        addStatusCodeMap(SC_INSUFFICIENT_SPACE_ON_RESOURCE, "Insufficient Space On Resource");
        addStatusCodeMap(SC_METHOD_FAILURE, "Method Failure");
        addStatusCodeMap(SC_LOCKED, "Locked");
    }

    /**
     * Returns the HTTP status text for the HTTP or WebDav status code
     * specified by looking it up in the static mapping.  This is a
     * static function.
     *
     * @param   nHttpStatusCode [IN] HTTP or WebDAV status code
     * @return  A string with a short descriptive phrase for the
     *                  HTTP status code (e.g., "OK").
     */
    public static String getStatusText(int nHttpStatusCode) {

        Integer intKey = new Integer(nHttpStatusCode);

        if (!mapStatusCodes.containsKey(intKey)) {
            return "";
        } else {
            return (String)mapStatusCodes.get(intKey);
        }
    }

    /**
     * Adds a new status code -> status text mapping.  This is a static
     * method because the mapping is a static variable.
     *
     * @param   nKey    [IN] HTTP or WebDAV status code
     * @param   strVal  [IN] HTTP status text
     */
    private static void addStatusCodeMap(int nKey, String strVal) {

        mapStatusCodes.put(new Integer(nKey), strVal);
    }
}
