/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.web.taglib;

import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.api.context.Context;
import org.openmrs.api.context.UserContext;

public class PrivilegeTag extends TagSupport {
	
	public static final long serialVersionUID = 11233L;
	
	private final Log log = LogFactory.getLog(getClass());
	
	private String privilege;
	
	private String inverse;
	
	public int doStartTag() {
		
		UserContext userContext = Context.getUserContext();
		
		log.debug("Checking user " + userContext.getAuthenticatedUser() + " for privs " + privilege);
		
		boolean hasPrivilege = false;
		if (privilege.contains(",")) {
			String[] privs = privilege.split(",");
			for (String p : privs) {
				if (userContext.hasPrivilege(p)) {
					hasPrivilege = true;
					break;
				}
			}
		} else {
			hasPrivilege = userContext.hasPrivilege(privilege);
		}
		
		// allow inversing
		boolean isInverted = false;
		if (inverse != null)
			isInverted = "true".equals(inverse.toLowerCase());
		
		if ((hasPrivilege && !isInverted) || (!hasPrivilege && isInverted)) {
			pageContext.setAttribute("authenticatedUser", userContext.getAuthenticatedUser());
			return EVAL_BODY_INCLUDE;
		} else {
			return SKIP_BODY;
		}
	}
	
	/**
	 * @return Returns the privilege.
	 */
	public String getPrivilege() {
		return privilege;
	}
	
	/**
	 * @param converse The privilege to set.
	 */
	public void setPrivilege(String privilege) {
		this.privilege = privilege;
	}
	
	/**
	 * @return Returns the inverse.
	 */
	public String getInverse() {
		return inverse;
	}
	
	/**
	 * @param inverse The inverse to set.
	 */
	public void setInverse(String inverse) {
		this.inverse = inverse;
	}
}