/**
    * This file Copyright (c) 2003-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.module.model.ModuleDefinition;
  import org.apache.commons.lang.exception.ExceptionUtils;
  
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  import java.util.Date;
  import java.util.List;
  import java.util.Map;
  
  /**
   * The {@link info.magnolia.module.InstallContext} provides {@link info.magnolia.module.delta.Task}s
   * and install/update UI with methods to log, get content and status.
   *
   * @author gjoseph
   * @version $Revision: $ ($Author: $)
   */
  public interface InstallContext {
  
      void info(String message);
  
      void warn(String message);
  
      void error(String message, Throwable th);
  
      void restartNeeded(String message);
  
      int getExecutedTaskCount();
  
      int getTotalTaskCount();
  
      InstallStatus getStatus();
  
      /**
       * A Map of messages where the key is the module name.
       */
      Map<String, List<Message>> getMessages();
  
      HierarchyManager getHierarchyManager(String workspace);
  
      HierarchyManager getConfigHierarchyManager();
  
      boolean hasModulesNode();
  
      /**
       * @return the root node for all modules in the config workspace.
       */
      Content getModulesNode() throws RepositoryException;
  
      Content getOrCreateCurrentModuleNode() throws RepositoryException;
  
      Content getOrCreateCurrentModuleConfigNode() throws RepositoryException;
  
      /**
       * Allows generic tasks to know what's being installed/updated.
       */
      ModuleDefinition getCurrentModuleDefinition();
  
      boolean isModuleRegistered(String moduleName);
  
      Session getJCRSession(String workspaceName) throws RepositoryException;
  
      Session getConfigJCRSession() throws RepositoryException;
 
     /**
      * Log messages kept in the InstallContext.
      */
     public static final class Message {
         private final Date timestamp;
         private final String message;
         private final String details;
         private final MessagePriority priority;
 
         public Message(MessagePriority priority, String message) {
             this(priority, message, (String) null);
         }
 
         public Message(MessagePriority priority, String message, Throwable th) {
             this(priority, message, th != null ? ExceptionUtils.getStackTrace(th) : null);
         }
 
         public Message(MessagePriority priority, String message, String details) {
             this.timestamp = new Date();
             this.priority = priority;
             this.message = message;
             this.details = details;
         }
 
         public Date getTimestamp() {
             return timestamp;
         }
 
         public String getMessage() {
             return message;
         }
 
         public String getDetails() {
             return details;
         }
 
         public MessagePriority getPriority() {
             return priority;
         }
     }
 
     /**
      * Priority for {@link info.magnolia.module.InstallContext.Message}s.
      */
     public enum MessagePriority {
         info, warning, error, restartNeeded
     }
 }