/*
 * Copyright (C) 2003-2008 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */
package org.exoplatform.services.cms.lock;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.jcr.Node;

/**
 * Created by The eXo Platform SAS
 * Author : Chien Nguyen
 * chien.nguyen@exoplatform.com
 * Nov 17, 2009
 */

/**
 * This service used to manage all the stuff which related to the locking nodes.
 * @author minh_dang
 *
 */
public interface LockService {

  /**
   * Get all pre-setting lock list
   * @return lock list
   * @throws Exception
   */
  public List<String> getPreSettingLockList() throws Exception;

/**
 * Get all the identities which allowed to unlock nodes
 * @return lock list
 * @throws Exception
 */
  public List<String> getAllGroupsOrUsersForLock() throws Exception;

  /**
   * Allow to add user or group to the locking manager list which allowed to unlock all nodes
   * @param groupsOrUsers User id or group id
   * @throws Exception
   */
  public void addGroupsOrUsersForLock(String groupsOrUsers) throws Exception;

  /**
   * Remove user or group out of the locking manager list
   * @param groupsOrUsers
   * @throws Exception
   */
  public void removeGroupsOrUsersForLock(String groupsOrUsers) throws Exception;

  /**
   * Return a HashMap which keeping all locked nodes informations
   * @return locks holding map
   */
  public HashMap<String, Map<String, String>> getLockHolding();

  /**
   * Put all informations of locked node such as locktoken to the Map
   * @param userId It is a key which will be used to get the locked information
   * @param lockedNodesInfo A Map which kept the locked node information
   */
  public void putToLockHoding(String userId, Map<String, String> lockedNodesInfo);

  /**
   * Return a Map which kept lock token of node which locked by user
   * @param userId
   * @return
   */
  public Map<String, String> getLockInformation(String userId);

  /**
   * Remove all locked nodes user
   * @param userId User Identity which will be used to remove all locked node which belong to he/she
   */
  public void removeLocksOfUser(String userId);

  /**
   * Remove all locked nodes in the system. This function just used in the case server stop working
   */
  public void removeLocks();

  /**
   * Get lock token of user from a specific node.
   * @param node a specific node
   * @return lock token
   * @throws Exception
   */
  public String getLockTokenOfUser(Node node) throws Exception;
  
  /**
   * Get lock token of user from a specific node using userId
   * @param node a specific node
   * @param userId the userId
   * @return lock token
   * @throws Exception
   */
  public String getLockTokenOfUser(Node node, String userId) throws Exception;

  /**
   * Create Lock key from specific node.
   *
   * @param node a specific node
   * @return lock key
   * @throws Exception
   */
  public String createLockKey(Node node) throws Exception;

  /**
   * Create Lock key from a specific node and user id.
   *
   * @param node a specific node
   * @param userId user ID
   * @return lock key
   * @throws Exception
   */
  public String createLockKey(Node node, String userId) throws Exception;

  /**
   * Get Lock token from specifiec node.
   *
   * @param node a specific node
   * @return lock token
   * @throws Exception
   */
  public String getLockToken(Node node) throws Exception;

  /**
   * Change lock token from source path to new node.
   *
   * @param srcPath source node path
   * @param newNode new node
   * @throws Exception
   */
  public void changeLockToken(String srcPath, Node newNode) throws Exception;

  /**
   * Change lock token from old node to new node.
   *
   * @param oldNode old node
   * @param newNode new node
   * @throws Exception
   */
  public void changeLockToken(Node oldNode, Node newNode) throws Exception;

  /**
   * Get old lock key from source path and a specific node.
   *
   * @param srcPath source path
   * @param node a specific node
   * @return
   * @throws Exception
   */
  public String getOldLockKey(String srcPath, Node node) throws Exception;

}
