/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2006-2016
 *
 * Licensed 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.glite.security.voms.admin.operations.users;

import org.glite.security.voms.User;
import org.glite.security.voms.admin.event.EventManager;
import org.glite.security.voms.admin.event.user.attribute.UserAttributeSetEvent;
import org.glite.security.voms.admin.operations.BaseVomsOperation;
import org.glite.security.voms.admin.operations.VOMSContext;
import org.glite.security.voms.admin.operations.VOMSPermission;
import org.glite.security.voms.admin.persistence.dao.VOMSUserDAO;
import org.glite.security.voms.admin.persistence.error.NoSuchUserException;
import org.glite.security.voms.admin.persistence.model.VOMSUser;
import org.glite.security.voms.admin.persistence.model.attribute.VOMSUserAttribute;
import org.glite.security.voms.service.attributes.AttributeValue;

public class SetUserAttributeOperation extends BaseVomsOperation {

  VOMSUser user;

  String attributeName;

  String attributeDescription;

  String attributeValue;

  private SetUserAttributeOperation(VOMSUser u, String aName, String aDesc,
    String aValue) {

    user = u;
    attributeName = aName;
    attributeDescription = aDesc;
    attributeValue = aValue;
  }

  public Object doExecute() {

    VOMSUserAttribute attribute = VOMSUserDAO.instance().setAttribute(user,
      attributeName, attributeValue);

    EventManager.instance().dispatch(new UserAttributeSetEvent(user, attribute));

    return attribute;

  }

  public static SetUserAttributeOperation instance(VOMSUser u, String aName,
    String aValue) {

    return new SetUserAttributeOperation(u, aName, null, aValue);
  }

  public static SetUserAttributeOperation instance(VOMSUser u, String aName,
    String aDesc, String aValue) {

    return new SetUserAttributeOperation(u, aName, aDesc, aValue);
  }

  public static SetUserAttributeOperation instance(User user, AttributeValue val) {

    VOMSUser u = (VOMSUser) FindUserOperation.instance(user.getDN(),
      user.getCA()).execute();

    if (u == null)
      throw new NoSuchUserException("User '" + user.getDN() + ","
        + user.getCA() + "' not found in this vo.");

    return new SetUserAttributeOperation(u, val.getAttributeClass().getName(),
      val.getAttributeClass().getDescription(), val.getValue());

  }

  protected void setupPermissions() {

    addRequiredPermission(VOMSContext.getVoContext(),
      VOMSPermission.getAttributesRWPermissions());
  }

}