org.topicquests.ks.tm.CredentialUtility.java Source code

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Here is the source code for org.topicquests.ks.tm.CredentialUtility.java

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/*
 * Copyright 2015, TopicQuests
 *
 * 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.topicquests.ks.tm;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import com.google.common.collect.Sets;
import com.google.common.collect.Sets.SetView;

import org.topicquests.ks.SystemEnvironment;
import org.topicquests.ks.api.ITicket;
import org.topicquests.ks.tm.api.ISubjectProxy;

/**
 * @author park
 *
 */
public class CredentialUtility {
    private SystemEnvironment environment;

    /**
     * 
     */
    public CredentialUtility(SystemEnvironment env) {
        environment = env;
    }

    /**
     * <p>Return <code>1</code> if sufficient <code>credentials</code>
     * to allow viewing this <code>node></p>
     * <p>Return <code>0</code> if not sufficient <code>credentials</code></p>
     * <p>Return <code>-1</code> if node has been removed: (isAlive = false)</p>
     * @param node
     * @param credentials
     * @return
     */
    public int checkCredentials(ISubjectProxy node, ITicket credentials) {
        int what = 1; //default
        if (!node.getIsLive())
            return -1;
        if (node.getIsPrivate()) {
            //node created by this dude?
            String cid = node.getCreatorId();
            if (!cid.equals(credentials.getUserLocator())) {
                //Same avatar?
                boolean found = false;
                List<String> l = credentials.listAvatars();
                if (l != null) {
                    if (l.contains(cid))
                        found = true;
                }
                if (!found) {
                    //check goup
                    Set<String> groupLocators = Sets.newHashSet(credentials.listGroupLocators());
                    Set<String> aclValues = Sets.newHashSet(node.listACLValues());
                    SetView<String> intersection = Sets.intersection(groupLocators, aclValues);
                    found = !intersection.isEmpty();
                }
                if (!found)
                    return 0;
            }
        }
        return what;
    }

}