CheckUsernameEndpoint.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.picketbox.http.quickstarts.idm;

import javax.servlet.ServletContext;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;

import org.picketbox.core.PicketBoxManager;
import org.picketbox.http.PicketBoxConstants;
import org.picketlink.idm.IdentityManager;
import org.picketlink.idm.model.User;

/**
 * <p>
 * JAX-RS Endpoint that checks if an username is already use.
 * </p>
 * 
 * @author <a href="mailto:psilva@redhat.com">Pedro Silva</a>
 * 
 */
@Path("/checkUsername")
public class CheckUsernameEndpoint {

    @Context
    private ServletContext servletContext;

    /**
     * <p>
     * Creates a new user using the information provided by the {@link RegistrationRequest} instance.
     * </p>
     * 
     * @param request
     * @return
     */
    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public RegistrationResponse checkUsername(final RegistrationRequest request) {
        RegistrationResponse response = new RegistrationResponse();

        if (!"".equals(request.getUserName())) {
            User user = getIdentityManager().getUser(request.getUserName());

            if (user != null) {
                response.setStatus("This username is already in use. Choose another one.");
            }
        }

        return response;
    }

    /**
     * <p>
     * Retrieve the {@link PicketBoxManager} instance from the {@link ServletContext} and get the configured
     * {@link IdentityManager}.
     * </p>
     * 
     * @param req
     * @return
     */
    private IdentityManager getIdentityManager() {
        PicketBoxManager picketBoxManager = (PicketBoxManager) this.servletContext
                .getAttribute(PicketBoxConstants.PICKETBOX_MANAGER);
        return picketBoxManager.getIdentityManager();
    }
}