/*
 * Copyright (c) 2017, cxy7.com
 *
 * 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.b3log.solo.module.util;

import org.b3log.solo.util.MD5;
import org.b3log.solo.util.PropsUtil;

/**
 * Thumbnail utilities.
 *
 * <p>
 * By using <a href="http://gravatar.com">Gravatar</a> for user thumbnail.
 * </p>
 *
 * @author <a href="http://cxy7.com">XyCai</a>
 * @version 1.1.0.0, May 19, 2015
 * @since 0.6.1
 */
public final class Thumbnails {

	/**
	 * Gravatar address.
	 */
	public static final String GRAVATAR;

	static {
		GRAVATAR = PropsUtil.getString("gravatar");
	}

	/**
	 * Gets the Gravatar URL for the specified email with the specified size.
	 * 
	 * @param email
	 *            the specified email
	 * @param size
	 *            the specified size
	 * @return the Gravatar URL
	 */
	public static String getGravatarURL(final String email, final String size) {
		return Thumbnails.GRAVATAR + MD5.hash(email) + "?s=" + size;
	}

	/**
	 * Private constructor.
	 */
	private Thumbnails() {
	}
}
