/*

 * Copyright (c) 2005, David Peterson 

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 

 *     * Redistributions of source code must retain the above copyright notice,

 *       this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above copyright

 * 			 notice, this list of conditions and the following disclaimer in the

 *   		 documentation and/or other materials provided with the distribution.

 *     * Neither the name of "randombits.org" nor the names of its contributors

 * 			 may be used to endorse or promote products derived from this software

 * 			 without specific prior written permission.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 * 

 * v1.0: Created on 16/05/2005 by David Peterson

 */

package org.randombits.confluence.metadata.reference;



import com.atlassian.confluence.user.ConfluenceUser;

import com.atlassian.sal.api.user.UserKey;

import com.atlassian.user.User;

import org.apache.commons.lang.StringUtils;

import org.apache.commons.lang.builder.HashCodeBuilder;



import static com.atlassian.confluence.user.persistence.dao.compatibility.FindUserHelper.getUserByUsername;



/**

 * @author randomeizer (David Peterson)

 * @author yclian

 */

public class UserReference implements Reference<User> {



    private static final long serialVersionUID = 1934030029425758042L;



    private String username;

    private String userKey;



    /**

     * Constructs a new, blank user option. For use when defrosting.

     */

    protected UserReference() {

    }



    public UserReference(ConfluenceUser user) {

        this(user.getKey());

    }



    /**

     * @deprecated Since 6.0.0 as Confluence 5.3 now uses userKey, not username.

     * @param username

     */

    @Deprecated

    public UserReference(String username) {

        this.username = username;

        // This won't happen when UserReference is being constructed through reflection as field injection is used.

        this.userKey = getUserKeyFromUsername(username);

    }



    /**

     * Constructs a new user option.

     *

     * @param userKey the user key of the user

     */

    public UserReference(UserKey userKey) {

        this.userKey = userKey.toString();

    }



    private String getUserKeyFromUsername(String username) {

        ConfluenceUser user = getUserByUsername(username);

        return null != user ? user.getKey().getStringValue() : null;

    }



    /**

     * @deprecated Since 6.0.0. Use {@link #getUserKey()} instead.

     * @return

     */

    @Deprecated

    public String getUsername() {

        return username;

    }



    public String getUserKey() {

        return userKey;

    }



    /**

     * @param obj The object to compare.

     * @return <code>true</code> if the object is a UserOption with the same

     *         username.

     * @see java.lang.Object#equals(java.lang.Object)

     */

    @Override

    public boolean equals( Object obj ) {

        if (obj instanceof UserReference) {

            UserReference uo = (UserReference) obj;

            return StringUtils.equals(userKey, uo.userKey);

        }

        return false;

    }



    /**

     * @return the hashcode for the object.

     * @see java.lang.Object#hashCode()

     */

    @Override

    public int hashCode() {

        return new HashCodeBuilder().append(userKey).toHashCode();

    }



    /**

     * @return the String version of the list option.

     * @see java.lang.Object#toString()

     */

    @Override

    public String toString() {



        StringBuilder r = new StringBuilder("user: ");



        if (null == userKey) {

            // HACK [20140208 YCL] Return the legacy username value if userKey is null (to make troubleshooting easier).

            // I don't know what would be the impact, no client should use toString() I suppose?

            if (null != username) {

                r.append(username);

            } else {

                r.append("null");

            }

        } else {

            r.append(userKey.toString());

        }



        return r.toString();

    }

}