com.github.cherimojava.orchidae.security.authenticator.PictureAccessAuthenticator.java Source code

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Here is the source code for com.github.cherimojava.orchidae.security.authenticator.PictureAccessAuthenticator.java

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/**
 * Copyright (C) 2014 cherimojava (http://github.com/cherimojava/orchidae)
 *
 * 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 com.github.cherimojava.orchidae.security.authenticator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContextHolder;

import com.github.cherimojava.data.mongo.entity.EntityFactory;
import com.github.cherimojava.orchidae.entity.Access;
import com.github.cherimojava.orchidae.entity.Picture;

/**
 * Validator which checks if the given user is allowed to view the requested picture or not.
 *
 * @author philnate
 * @since 1.0.0
 */
public class PictureAccessAuthenticator {

    @Autowired
    EntityFactory factory;

    /**
     * performs the access validation. Returns true if the picture is owned by the current user or is public
     * 
     * @param id
     * @return
     */
    public boolean hasAccess(String id) {
        String user = (String) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        Picture pic = factory.load(Picture.class, id);
        return pic != null && (pic.getUser().getUsername().equals(user) || Access.PUBLIC.equals(pic.getAccess()));
    }
}