/*
 * 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 org.apache.sling.resource.predicates;

import java.util.function.Predicate;

import org.apache.sling.api.resource.Resource;

/**
 * Collection of predicates specific to obtaining information from the resource
 * object which isn't a property value
 *
 */
public class ResourcePredicates {

    /**
     * Convenience method to wrap the resources method 'isResourceType'
     * 
     * @param resourceType
     * @return predicate which evaluates
     */
    public static Predicate<Resource> isResourceType(final String resourceType) {
        return resource -> resource.isResourceType(resourceType);
    }

    /**
     * Convenience method to determine depth of resource via the path
     * 
     * @param resourceType
     * @return predicate which evaluates
     */
    public static Predicate<Resource> maxDepth(final int depth) {
        return new Predicate<Resource>() {
            int startingDepth = -1;

            @Override
            public boolean test(Resource resource) {
                int currentDepth = resource.getPath().split("/").length;
                if (startingDepth < 0) {
                    startingDepth = currentDepth;
                }
                return currentDepth - startingDepth < depth;
            }

        };
    }

}