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FURMS Unity DAO/Client module
There is a newer version: 4.3.1
/*
 * Copyright (c) 2020 Bixbit s.c. All rights reserved.
 * See LICENSE file for licensing information.
 */

package io.imunity.furms.unity.client;

import io.imunity.furms.domain.authz.roles.ResourceId;
import io.imunity.furms.domain.authz.roles.ResourceType;
import io.imunity.furms.domain.communities.CommunityId;
import io.imunity.furms.domain.projects.ProjectId;
import io.imunity.furms.domain.sites.SiteId;
import io.imunity.rest.api.types.basic.RestAttribute;
import org.springframework.util.AntPathMatcher;

import java.util.Map;
import java.util.UUID;
import java.util.function.Predicate;

import static io.imunity.furms.unity.common.UnityConst.COMMUNITY_PREFIX;
import static io.imunity.furms.unity.common.UnityConst.FENIX_PATTERN;

public class UnityGroupParser {
	private static final AntPathMatcher matcher = new AntPathMatcher();
	public final static Predicate COMMUNITY_BASE_GROUP_PREDICATE = 
			group -> matcher.match(COMMUNITY_PREFIX + "*", group);
	public final static Predicate usersGroupPredicate4Attr = a -> a.groupPath.endsWith("/users");

	private static final Map resourcesPatterns = Map.of(
		FENIX_PATTERN, ResourceType.APP_LEVEL,
		"/fenix/sites/*/users", ResourceType.SITE,
		"/fenix/communities/*/users", ResourceType.COMMUNITY,
		"/fenix/communities/*/projects/*/users", ResourceType.PROJECT,
		"/fenix/communities/*", ResourceType.COMMUNITY,
		"/fenix/communities/*/projects/*", ResourceType.PROJECT
	);

	public static ResourceId attr2Resource(RestAttribute attribute) {
		return getResourceId(attribute.groupPath);
	}
	
	public static ResourceId getResourceId(String group){
		if(group == null)
			throw new IllegalArgumentException("Group cannot be a null");

		UUID id = null;
		String[] groupElements = group.replaceFirst("^/", "").split("/");

		if(groupElements.length < 2)
			throw new IllegalArgumentException("Group should contain at least two elements");
		if(groupElements.length > 2) {
			int idIndex = groupElements[groupElements.length - 1].equals("users") ? 
					groupElements.length - 2 : groupElements.length - 1;
			id = UUID.fromString(groupElements[idIndex]);
		}
		ResourceType type = getResourceType(group);
		switch (type){
			case APP_LEVEL:
				return new ResourceId(null, type);
			case SITE:
				return new ResourceId(new SiteId(id), type);
			case COMMUNITY:
				return new ResourceId(new CommunityId(id), type);
			case PROJECT:
				return new ResourceId(new ProjectId(id), type);
			default:
				throw new IllegalArgumentException("This shouldn't happen. Resource type always have to be set");
		}

	}

	private static ResourceType getResourceType(String group) {
		return resourcesPatterns.entrySet().stream()
			.filter(e -> matcher.match(e.getKey(), group))
			.findAny()
			.map(Map.Entry::getValue)
			.orElseThrow();
	}
}