com.liferay.portlet.social.util.FacebookUtil.java Source code

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Here is the source code for com.liferay.portlet.social.util.FacebookUtil.java

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/**
 * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
 *
 * This library 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 library 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.
 */

package com.liferay.portlet.social.util;

import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.CharPool;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.Http;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.util.Portal;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Jorge Ferrer
 */
public class FacebookUtil {

    public static final String FACEBOOK_APPS_URL = "http://apps.facebook.com/";

    public static final String FACEBOOK_SERVLET_PATH = "/facebook/";

    public static String[] getFacebookData(HttpServletRequest request) {
        String path = GetterUtil.getString(request.getPathInfo());

        if (Validator.isNull(path)) {
            return null;
        }

        int pos = path.indexOf(StringPool.SLASH, 1);

        if (pos == -1) {
            return null;
        }

        String facebookCanvasPageURL = path.substring(1, pos);

        if (_log.isDebugEnabled()) {
            _log.debug("Facebook canvas page URL " + facebookCanvasPageURL);
        }

        if (Validator.isNull(facebookCanvasPageURL)) {
            return null;
        }

        String redirect = path.substring(pos);

        if (_log.isDebugEnabled()) {
            _log.debug("Redirect " + redirect);
        }

        if (Validator.isNull(redirect)) {
            return null;
        }

        pos = path.indexOf(Portal.FRIENDLY_URL_SEPARATOR);

        String appPath = StringPool.BLANK;

        if (pos != -1) {
            pos = path.indexOf(CharPool.SLASH, pos + 3);

            if (pos != -1) {
                appPath = path.substring(pos);
            }
        }

        return new String[] { facebookCanvasPageURL, redirect, appPath };
    }

    public static boolean isFacebook(String currentURL) {
        String path = currentURL;

        if (currentURL.startsWith(Http.HTTP)) {
            int pos = currentURL.indexOf(CharPool.SLASH, Http.HTTPS_WITH_SLASH.length());

            path = currentURL.substring(pos);
        }

        if (path.startsWith(FACEBOOK_SERVLET_PATH)) {
            return true;
        } else {
            return false;
        }
    }

    private static Log _log = LogFactoryUtil.getLog(FacebookUtil.class);

}