edu.zipcloud.cloudstreetmarket.core.util.AuthenticationUtil.java Source code

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Here is the source code for edu.zipcloud.cloudstreetmarket.core.util.AuthenticationUtil.java

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/***
 *  Cloudstreetmarket.com is a Spring MVC showcase application developed 
 *  with the book Spring MVC Cookbook [PACKT] (2015). 
 *    Copyright (C) 2015  Alex Bretet
 *  
 *  This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU 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 edu.zipcloud.cloudstreetmarket.core.util;

import org.apache.commons.lang3.StringUtils;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;

import edu.zipcloud.cloudstreetmarket.core.entities.User;
import edu.zipcloud.cloudstreetmarket.core.enums.Role;

public class AuthenticationUtil {

    public static boolean userHasRole(Role role) {
        SecurityContext securityContext = SecurityContextHolder.getContext();
        if (securityContext != null) {
            Authentication auth = securityContext.getAuthentication();
            if (auth != null) {
                if (!auth.isAuthenticated()) {
                    return false;
                }
            }
        }

        return UserDetailsUtil.hasRole(getPrincipal(), role);
    }

    public static UserDetails getPrincipal() {
        SecurityContext securityContext = SecurityContextHolder.getContext();
        if (securityContext != null) {
            Authentication auth = securityContext.getAuthentication();
            if (auth != null) {
                Object principal = auth.getPrincipal();
                if (principal instanceof UserDetails) {
                    return (UserDetails) principal;
                }
            }
        }
        return new User();
    }

    public static boolean isThePrincipal(String userId) {
        SecurityContext securityContext = SecurityContextHolder.getContext();
        if (securityContext != null && !StringUtils.isBlank(userId)) {
            Authentication auth = securityContext.getAuthentication();
            if (auth != null) {
                Object principal = auth.getPrincipal();
                if (principal instanceof UserDetails && userId.equals(((UserDetails) principal).getUsername())) {
                    return true;
                }
            }
        }
        return false;
    }

    public static User getUserPrincipal() {
        SecurityContext securityContext = SecurityContextHolder.getContext();
        if (securityContext != null) {
            Authentication auth = securityContext.getAuthentication();
            if (auth != null) {
                Object principal = auth.getPrincipal();
                if (principal instanceof User) {
                    return (User) principal;
                }
            }
        }
        return new User();
    }
}