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package org.ff4j.security;

/*-
 * #%L
 * ff4j-security-spring
 * %%
 * Copyright (C) 2013 - 2024 FF4J
 * %%
 * 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.
 * #L%
 */

import java.util.LinkedHashSet;
import java.util.Set;

import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 * Implementation of {@link AuthorizationsManager} with SpringSecurity framework.
 * 
 * @author clunven
 * 
 */
public class SpringSecurityAuthorisationManager extends AbstractAuthorizationManager {

    /** {@inheritDoc} */
    public Set getCurrentUserPermissions() {
        Set listOfRoles = new LinkedHashSet();
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (!(auth instanceof AnonymousAuthenticationToken)) {
            for (GrantedAuthority grantedAuthority : auth.getAuthorities()) {
                listOfRoles.add(grantedAuthority.getAuthority());
            }
        }
        return listOfRoles;
    }

    /** {@inheritDoc} */
    public Set listAllPermissions() {
        return getCurrentUserPermissions();
    }

    /** {@inheritDoc} */
    public String getCurrentUserName() {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (null == auth || auth instanceof AnonymousAuthenticationToken) {
            return "anonymous";
        }
        return auth.getName();
    }   

}