/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/common/StatisticsUtil.java,v 1.2 2004/04/06 19:38:01 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.2 $
 * $Date: 2004/04/06 19:38:01 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002-2004 by MyVietnam.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * All copyright notices regarding mvnForum MUST remain intact
 * in the scripts and in the outputted HTML.
 * The "powered by" text/logo with a link back to
 * http://www.mvnForum.com and http://www.MyVietnam.net in the
 * footer of the pages MUST remain visible when the pages
 * are viewed on the internet or intranet.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Support can be obtained from support forums at:
 * http://www.mvnForum.com/mvnforum/index
 *
 * Correspondence and Marketing Questions can be sent to:
 * info@MyVietnam.net
 *
 * @author: Minh Nguyen  minhnn@MyVietnam.net
 */
package com.mvnforum.common;

import java.sql.Timestamp;
import java.util.Collection;
import java.util.Iterator;

import com.mvnforum.db.DAOFactory;
import com.mvnforum.db.PostBean;
import net.myvietnam.mvncore.exception.*;
import net.myvietnam.mvncore.exception.AssertionException;
import net.myvietnam.mvncore.exception.ObjectNotFoundException;

public class StatisticsUtil {

    private StatisticsUtil() {
    }

    /**
     * This method is used to update the thread statistics
     * It updates these information: threadReplyCount, lastPostMemberName, threadLastPostDate
     *
     * @param threadID the thread to update its statistic
     * @throws ObjectNotFoundException
     * @throws java.lang.IllegalArgumentException
     * @throws DatabaseException
     * @throws AssertionException
     */
    public static void updateThreadStatistics(int threadID)
        throws ObjectNotFoundException, IllegalArgumentException, DatabaseException, AssertionException {

        int threadReplyCount = DAOFactory.getPostDAO().getNumberOfEnablePosts_inThread(threadID) - 1;
        DAOFactory.getThreadDAO().updateReplyCount(threadID, threadReplyCount);

        Collection lastPostInThread = DAOFactory.getPostDAO().getLastEnablePosts_inThread_limit(threadID, 1);
        Iterator iteratorInThread = lastPostInThread.iterator();
        if (iteratorInThread.hasNext()) {
            PostBean lastPostBeanInThread = (PostBean)iteratorInThread.next();
            String lastPostMemberName = lastPostBeanInThread.getMemberName();
            Timestamp threadLastPostDate = lastPostBeanInThread.getPostCreationDate();
            try {
                DAOFactory.getThreadDAO().updateLastPostMemberName(threadID, lastPostMemberName);
            } catch (ForeignKeyNotFoundException ex) {
                throw new AssertionException("Assertion: cannot update LastPostMemberName of Thread in StatisticsUtil.updateThreadStatistics");
            }
            DAOFactory.getThreadDAO().updateLastPostDate(threadID, threadLastPostDate);
        }
    }

    /**
     * This method is used to update the forum statistics
     * It updates these information: forumThreadCount, forumPostCount, lastPostMemberName, forumLastPostDate
     *
     * @param forumID the forum to update its statistics
     * @throws java.lang.IllegalArgumentException
     * @throws ObjectNotFoundException
     * @throws DatabaseException
     * @throws AssertionException
     */
    public static void updateForumStatistics(int forumID)
        throws ObjectNotFoundException, DatabaseException, AssertionException {

        int forumThreadCount = DAOFactory.getThreadDAO().getNumberOfEnableBeans_inForum(forumID);
        int forumPostCount = DAOFactory.getPostDAO().getNumberOfEnablePosts_inForum(forumID);

        // because the disable thread has first post in enable, so the
        // correct number of posts are the enable posts - disable threads
        int forumDisableThreadCount = DAOFactory.getThreadDAO().getNumberOfDisableBeans_inForum(forumID);
        forumPostCount -= forumDisableThreadCount;

        DAOFactory.getForumDAO().updateStatistics(forumID, forumThreadCount, forumPostCount);

        Collection lastPostInForum = DAOFactory.getPostDAO().getLastEnablePosts_inForum_limit(forumID, 1);
        Iterator iteratorInForum = lastPostInForum.iterator();
        if (iteratorInForum.hasNext()) {
            PostBean lastPostBeanInForum = (PostBean)iteratorInForum.next();
            String lastPostMemberName = lastPostBeanInForum.getMemberName();
            Timestamp forumLastPostDate = lastPostBeanInForum.getPostCreationDate();
            try {
                DAOFactory.getForumDAO().updateLastPostMemberName(forumID, lastPostMemberName);
            } catch (ForeignKeyNotFoundException ex) {
                throw new AssertionException("Assertion: cannot update LastPostMemberName of Forum in StatisticsUtil.updateForumStatistics");
            }
            DAOFactory.getForumDAO().updateLastPostDate(forumID, forumLastPostDate);
        }
    }

    public static void updateMemberStatistics(int memberID)
        throws DatabaseException, AssertionException, ObjectNotFoundException {

        int memberPostCount = DAOFactory.getPostDAO().getNumberOfPosts_inMember(memberID);
        DAOFactory.getMemberDAO().updatePostCount(memberID, memberPostCount);
    }


}