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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.rest.api.service.impl;

import io.gravitee.rest.api.idp.api.authentication.UserDetails;
import io.gravitee.rest.api.model.permissions.RoleScope;
import io.gravitee.rest.api.model.permissions.SystemRole;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public abstract class AbstractService extends TransactionalService {

    public static final String ENVIRONMENT_ADMIN = RoleScope.ENVIRONMENT.name() + ':' + SystemRole.ADMIN.name();

    String getAuthenticatedUsername() {
        UserDetails authenticatedUser = getAuthenticatedUser();
        return authenticatedUser == null ? null : authenticatedUser.getUsername();
    }

    protected UserDetails getAuthenticatedUser() {
        if (isAuthenticated()) {
            return (UserDetails) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        }
        return null;
    }

    protected boolean isAuthenticated() {
        return (
            SecurityContextHolder.getContext().getAuthentication() != null &&
            SecurityContextHolder.getContext().getAuthentication().getPrincipal() instanceof UserDetails
        );
    }

    protected boolean isAdmin() {
        return isUserInRole(ENVIRONMENT_ADMIN);
    }

    private boolean isUserInRole(final String role) {
        return SecurityContextHolder
            .getContext()
            .getAuthentication()
            .getAuthorities()
            .stream()
            .anyMatch(auth -> role.equals(auth.getAuthority()));
    }
}