/**
 * Copyright (c) 2003-2005, David A. Czarnecki
 * All rights reserved.
 *
 * Portions Copyright (c) 2003-2005 by Mark Lussier
 *
 * 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.
 * Neither the name of the "David A. Czarnecki" and "blojsom" nor the names of
 * its contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * Products derived from this software may not be called "blojsom",
 * nor may "blojsom" appear in their name, without prior written permission of
 * David A. Czarnecki.
 *
 * 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
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE COPYRIGHT OWNER 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 org.blojsom.authorization;

import org.blojsom.BlojsomException;
import org.blojsom.blog.BlogUser;
import org.blojsom.blog.BlojsomConfiguration;
import org.blojsom.blog.BlojsomConfigurationException;

import javax.servlet.ServletConfig;
import java.util.Map;

/**
 * AuthorizationProvider
 *
 * @author David Czarnecki
 * @version $Id: AuthorizationProvider.java,v 1.1.2.1 2005/07/21 14:11:01 johnan Exp $
 * @since blojsom 2.16
 */
public interface AuthorizationProvider {

    /**
     * Initialization method for the authorization provider
     *
     * @param servletConfig        ServletConfig for obtaining any initialization parameters
     * @param blojsomConfiguration {@link BlojsomConfiguration} for blojsom-specific configuration information
     * @throws BlojsomConfigurationException If there is an error initializing the provider
     */
    public void init(ServletConfig servletConfig, BlojsomConfiguration blojsomConfiguration) throws BlojsomConfigurationException;

    /**
     * Loads the authentication credentials for a given user
     *
     * @param blogUser {@link BlogUser}
     * @throws BlojsomException If there is an error loading the user's authentication credentials
     */
    public void loadAuthenticationCredentials(BlogUser blogUser) throws BlojsomException;

    /**
     * Authorize a username and password for the given {@link BlogUser}
     *
     * @param blogUser             {@link BlogUser}
     * @param authorizationContext {@link Map} to be used to provide other information for authorization. This will
     *                             change depending on the authorization provider.
     * @param username             Username
     * @param password             Password
     * @throws BlojsomException If there is an error authorizing the username and password
     */
    public void authorize(BlogUser blogUser, Map authorizationContext, String username, String password) throws BlojsomException;

    /**
     * Check a permission for the given {@link BlogUser}
     *
     * @param blogUser          {@link BlogUser}
     * @param permissionContext {@link Map} to be used to provide other information for permission check. This will
     *                          change depending on the authorization provider.
     * @param username          Username
     * @param permission        Permission
     * @throws BlojsomException If there is an error checking the permission for the username and permission
     */
    public void checkPermission(BlogUser blogUser, Map permissionContext, String username, String permission) throws BlojsomException;
}