/**
    * This file Copyright (c) 2012-2016 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.jcr.util;
  
  import info.magnolia.context.Context;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.context.SystemContext;
  
  import java.util.Calendar;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Magnolia defined NodeTypes together with their properties and some convenience methods.
   */
  public class NodeTypes {
  
      private static final Logger log = LoggerFactory.getLogger(NodeTypes.class);
  
      /**
       * Namespace for Magnolia extensions.
       */
      public static final String MGNL_PREFIX = "mgnl:";
  
      /**
       * Namespace for jcr nodes and properties.
       */
      public static final String JCR_PREFIX = "jcr:";
  
      /**
       * Namespace for rep nodes and properties.
       */
      public static final String REP_PREFIX = "rep:";
  
      /**
       * Default suffix for userName keeping properties.
       */
      private static final String BY = "By";
  
      /**
       * Represents the mixin mgnl:lastModified.
       */
      public static class LastModified {
          public static final String NAME = MGNL_PREFIX + "lastModified";
          public static final String LAST_MODIFIED = NAME;
          public static final String LAST_MODIFIED_BY = LAST_MODIFIED + BY;
  
          /**
           * Returns the date when this node was last modified. If the no modification date has been stored on the node this
           * method return the creation date if set, otherwise null is returned.
           */
          public static Calendar getLastModified(Node node) throws RepositoryException {
              return node.hasProperty(LAST_MODIFIED) ? node.getProperty(LAST_MODIFIED).getDate() : Created.getCreated(node);
          }
  
          /**
           * Returns the name of the user that last modified the node. If no modification has been stored on the node
           * this method return the name of the user that created the node if set, otherwise null is returned.
           */
          public static String getLastModifiedBy(Node node) throws RepositoryException {
              return node.hasProperty(LAST_MODIFIED_BY) ? node.getProperty(LAST_MODIFIED_BY).getString() : Created.getCreatedBy(node);
          }
  
          /**
          * Sets the date of modification to current Calendar and uses {@link info.magnolia.context.MgnlContext} to set the name of the user.
          * It should not be necessary to call this method explicitly as all Magnolia treated node instances are self updating the property defined by mixin.
          *
          * @see info.magnolia.jcr.wrapper.MgnlPropertySettingContentDecorator for more details.
          */
         public static void update(Node node) throws RepositoryException {
             update(node, getCurrentCalendar());
         }
 
         /**
          * Sets the date of modification.
          * It should not be necessary to call this method explicitly as all Magnolia treated node instances are self updating the property defined by mixin.
          *
          * @see info.magnolia.jcr.wrapper.MgnlPropertySettingContentDecorator for more details.
          */
         public static void update(Node node, Calendar lastModified) throws RepositoryException {
             update(node, getCurrentUserName(), lastModified);
         }
 
         /**
          * Sets the date of modification and the name of the user modifying a node.
          * It should not be necessary to call this method explicitly as all Magnolia treated node instances are self updating the property defined by mixin.
          *
          * @see info.magnolia.jcr.wrapper.MgnlPropertySettingContentDecorator for more details.
          */
         public static void update(Node node, String userName, Calendar lastModified) throws RepositoryException {
             checkNodeType(node, LastModified.NAME, LAST_MODIFIED, LAST_MODIFIED_BY);
             node.setProperty(LAST_MODIFIED, lastModified);
             node.setProperty(LAST_MODIFIED_BY, userName);
         }
 
     }
 
     /**
      * Represents the mixin mgnl:activatable.
      */
     public static class Activatable {
         public static final String NAME = MGNL_PREFIX + "activatable";
         public static final String LAST_ACTIVATED = MGNL_PREFIX + "lastActivated";
         public static final String LAST_ACTIVATED_BY = LAST_ACTIVATED + BY;
         public static final String ACTIVATION_STATUS = MGNL_PREFIX + "activationStatus";
 
         public static final int ACTIVATION_STATUS_NOT_ACTIVATED = 0;
 
         public static final int ACTIVATION_STATUS_MODIFIED = 1;
 
         public static final int ACTIVATION_STATUS_ACTIVATED = 2;
 
         /**
          * Returns the activation status of the node. Returns one of the constants:
          * <ul>
          * <li>{@link #ACTIVATION_STATUS_NOT_ACTIVATED} if the node has not been activated</li>
          * <li>{@link #ACTIVATION_STATUS_MODIFIED} has been activated and subsequently modified</li>
          * <li>{@link #ACTIVATION_STATUS_ACTIVATED} has been activated and not modified since</li>
          * </ul>
          */
         public static int getActivationStatus(Node node) throws RepositoryException {
 
             if (!isActivated(node)) {
                 // never activated or deactivated
                 return ACTIVATION_STATUS_NOT_ACTIVATED;
             }
 
             Calendar lastModified = LastModified.getLastModified(node);
             Calendar lastActivated = getLastActivated(node);
 
             if (lastModified != null && lastModified.after(lastActivated)) {
                 // node has been modified after last activation
                 return ACTIVATION_STATUS_MODIFIED;
             }
 
             // activated and not modified ever since
             return ACTIVATION_STATUS_ACTIVATED;
         }
 
         /**
          * Returns true if the node has been activated.
          */
         public static boolean isActivated(Node node) throws RepositoryException {
             return node.hasProperty(ACTIVATION_STATUS) && node.getProperty(ACTIVATION_STATUS).getBoolean();
         }
 
         /**
          * Returns the date when the node was last activated or null if no activation date has been stored on the node.
          */
         public static Calendar getLastActivated(Node node) throws RepositoryException {
             return node.hasProperty(LAST_ACTIVATED) ? node.getProperty(LAST_ACTIVATED).getDate() : null;
         }
 
         /**
          * Returns the name of the user that last activated the node or null if no activating user has been stored on the node.
          */
         public static String getLastActivatedBy(Node node) throws RepositoryException {
             return node.hasProperty(LAST_ACTIVATED_BY) ? node.getProperty(LAST_ACTIVATED_BY).getString() : null;
         }
 
         /**
          * Sets the name of the user that performed the most recent activation as well as to current time.
          */
         public static void update(Node node, String userName, boolean isActivated) throws RepositoryException {
             checkNodeType(node, Activatable.NAME, LAST_ACTIVATED, LAST_ACTIVATED_BY, ACTIVATION_STATUS);
             node.setProperty(LAST_ACTIVATED, getCurrentCalendar());
             node.setProperty(LAST_ACTIVATED_BY, userName);
             node.setProperty(ACTIVATION_STATUS, isActivated);
         }
 
     }
 
     /**
      * Represents the mixin mgnl:created.
      */
     public static class Created {
         public static final String NAME = MGNL_PREFIX + "created";
         public static final String CREATED = NAME;
         public static final String CREATED_BY = CREATED + BY;
 
         /**
          * Returns the creation date of a node or null if creation date isn't set.
          */
         public static Calendar getCreated(Node node) throws RepositoryException {
             return node.hasProperty(CREATED) ? node.getProperty(CREATED).getDate() : null;
         }
 
         /**
          * Returns the name of the user that created a node.
          */
         public static String getCreatedBy(Node node) throws RepositoryException {
             return node.hasProperty(CREATED_BY) ? node.getProperty(CREATED_BY).getString() : null;
         }
 
         /**
          * Sets the current date as the node's creation date and uses {@link info.magnolia.context.MgnlContext} to set the name of the creating
          * user. Used with nodes having the <code>mgnl:created</code> mixin.
          */
         public static void set(Node node) throws RepositoryException {
             set(node, getCurrentUserName(), getCurrentCalendar());
         }
 
         /**
          * Sets the supplied date as the node's creation date and sets the name of the creating user. Also sets the date of
          * modification and the user last having modified the node to the same values. Used with nodes having the
          * <code>mgnl:created</code> mixin.
          */
         public static void set(Node node, String userName, Calendar created) throws RepositoryException {
             checkNodeType(node, NAME, CREATED, CREATED_BY);
             node.setProperty(CREATED, created);
             node.setProperty(CREATED_BY, userName);
 
             LastModified.update(node, userName, created);
         }
     }
 
     /**
      * Represents the mixin mgnl:renderable.
      */
     public static class Renderable {
         public static final String NAME = MGNL_PREFIX + "renderable";
         public static final String TEMPLATE = MGNL_PREFIX + "template";
 
         /**
          * Returns the template assigned to the node or null of none has been assigned. Used with nodes having the
          * <code>mgnl:renderable</code> mixin.
          */
         public static String getTemplate(Node node) throws RepositoryException {
             return node.hasProperty(TEMPLATE) ? node.getProperty(TEMPLATE).getString() : null;
         }
 
         /**
          * Sets the template assigned to the node. Used with nodes having the <code>mgnl:renderable</code> mixin.
          */
         public static void set(Node node, String template) throws RepositoryException {
             checkNodeType(node, NAME, TEMPLATE);
             node.setProperty(TEMPLATE, template);
         }
     }
 
     /**
      * Represents the mixin mgnl:deleted.
      */
     public static class Deleted {
         public static final String NAME = MGNL_PREFIX + "deleted";
         public static final String DELETED = NAME;
         public static final String DELETED_BY = DELETED + BY;
         public static final String COMMENT = MGNL_PREFIX + "comment";
 
         /**
          * Returns the date when the node was deleted or null if no deletion date has been stored on the node.
          */
         public static Calendar getDeleted(Node node) throws RepositoryException {
             return node.hasProperty(DELETED) ? node.getProperty(DELETED).getDate() : null;
         }
 
         /**
          * Returns the name of the user that deleted the node or null if no deleting user has been stored on the node.
          */
         public static String getDeletedBy(Node node) throws RepositoryException {
             return node.hasProperty(DELETED_BY) ? node.getProperty(DELETED_BY).getString() : null;
         }
 
         /**
          * Returns the comment set when then node was last deleted or null if no comment has been set.
          */
         public static String getComment(Node node) throws RepositoryException {
             return node.hasProperty(COMMENT) ? node.getProperty(COMMENT).getString() : null;
         }
 
         public static void set(Node node, String comment) throws RepositoryException {
             checkNodeType(node, NAME, DELETED, DELETED_BY, COMMENT);
             node.setProperty(DELETED, getCurrentCalendar());
             node.setProperty(DELETED_BY, getCurrentUserName());
             node.setProperty(COMMENT, comment);
         }
     }
 
     /**
      * Represents the mixin mgnl:versionable.
      */
     public static class Versionable {
         public static final String NAME = MGNL_PREFIX + "versionable";
         public static final String COMMENT = Deleted.COMMENT;
 
         /**
          * Returns the comment set when then node was last versioned or null if no comment has been set.
          */
         public static String getComment(Node node) throws RepositoryException {
             return node.hasProperty(COMMENT) ? node.getProperty(COMMENT).getString() : null;
         }
 
         /**
          * Set the versioning comment on the node.
          */
         public static void set(Node node, String comment) throws RepositoryException {
             checkNodeType(node, NAME, COMMENT);
             node.setProperty(COMMENT, comment);
         }
     }
 
     /**
      * Represents the nodeType mgnl:folder.
      */
     public static class Folder {
         public static final String NAME = MGNL_PREFIX + "folder";
     }
 
     /**
      * Represents the nodeType mgnl:resource.
      */
     public static class Resource {
         public static final String NAME = MGNL_PREFIX + "resource";
     }
 
     /**
      * Represents the nodeType mgnl:content.
      */
     public static class Content {
         public static final String NAME = MGNL_PREFIX + "content";
     }
 
     /**
      * Represents the nodeType mgnl:contentNode.
      */
     public static class ContentNode {
         public static final String NAME = MGNL_PREFIX + "contentNode";
     }
 
     /**
      * Represents the nodeType mgnl:nodeData.
      */
     public static class NodeData {
         public static final String NAME = MGNL_PREFIX + "nodeData";
     }
 
     /**
      * Represents the nodeType mgnl:page.
      */
     public static class Page {
         public static final String NAME = MGNL_PREFIX + "page";
     }
 
     /**
      * Represents the nodeType mgnl:area.
      */
     public static class Area {
         public static final String NAME = MGNL_PREFIX + "area";
     }
 
     /**
      * Represents the nodeType mgnl:component.
      */
     public static class Component {
         public static final String NAME = MGNL_PREFIX + "component";
     }
 
     /**
      * Represents the nodeType mgnl:user.
      */
     public static class User {
         public static final String NAME = MGNL_PREFIX + "user";
     }
 
     /**
      * Represents the nodeType mgnl:role.
      */
     public static class Role {
         public static final String NAME = MGNL_PREFIX + "role";
     }
 
     /**
      * Represents the nodeType mgnl:group.
      */
     public static class Group {
         public static final String NAME = MGNL_PREFIX + "group";
     }
 
     /**
      * Represents the nodeType mgnl:reserve.
      */
     public static class System {
         public static final String NAME = MGNL_PREFIX + "reserve";
     }
 
     /**
      * Represents the nodeType mgnl:metaData.
      * Is basically obsolete since MetaData as mixin but could still be used in customers code,
      * hence it has to stay for quite a while.
      */
     public static class MetaData {
         public static final String NAME = MGNL_PREFIX + "metaData";
     }
 
     /**
      * Mixin that marks node that have versions.
      */
     public static class HasVersion {
         public static final String NAME = MGNL_PREFIX + "hasVersion";
     }
 
     protected static String getCurrentUserName() {
         String userName = MgnlContext.getUser().getName();
         if (MgnlContext.isSystemInstance()) {
             // in system context try to obtain original non-system context and retrieve user from it
             Context ctx = ((SystemContext) MgnlContext.getInstance()).getOriginalContext();
             if (ctx != null && ctx.getUser() != null && !userName.equals(ctx.getUser().getName())) {
                 // log user and prepend "system" to the name to show in audit log that action was executed via system context w/o user really having privileges set to do such op on his own
                 return "System [" + ctx.getUser().getName() + "]";
             }
         }
         return userName;
     }
 
     protected static Calendar getCurrentCalendar() {
         return Calendar.getInstance();
     }
 
     public static void checkNodeType(Node node, String nodeType, String... propertyNames) throws RepositoryException {
         if (!node.isNodeType(nodeType)) {
             log.warn("Trying to set property/ies '{}' although the node '{}' with PrimaryType '{}' is not of type '{}'!", propertyNames, node.getPath(), node.getPrimaryNodeType().getName(), nodeType);
         }
     }
 }