/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/auth/ForumListPermission.java,v 1.4 2004/04/06 19:38:00 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.4 $
 * $Date: 2004/04/06 19:38:00 $
 *
 * ====================================================================
 *
 * 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
 * @author: Mai  Nguyen  mai.nh@MyVietnam.net
 */
package com.mvnforum.auth;

import java.util.*;

import com.mvnforum.db.ForumBean;
import com.mvnforum.db.ForumCache;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * This class is used in MVNForumPermissionImpl to imnplement forum-specific permission
 * NOTE: This class is NOT thread-safe
 */
class ForumListPermission {

    private static Log log = LogFactory.getLog(ForumListPermission.class);

    ArrayList forumList = new ArrayList();

    boolean allForumsPermission = false;

    boolean bypassPrivateForum = false;

    public ForumListPermission() {
    }

    void setAllForumsPermission(boolean permission) {
        allForumsPermission = permission;
    }

    void setForumPermission(int forumID, boolean permission) {
        // always remove forumid
        Iterator iter = forumList.iterator();
        while (iter.hasNext()) {
            int currentForumID = ((Integer) iter.next()).intValue();
            if (currentForumID == forumID) {
                iter.remove();
            }
        } //while

        // now add to the list if the permission = false
        if (permission) {
            // add permission
            forumList.add(new Integer(forumID));
        }
    }

    boolean hasPermssion(int forumID) {

        for (int i = 0; i < forumList.size(); i++) {
            int currentForumID = ((Integer)forumList.get(i)).intValue();
            if (currentForumID == forumID) {
                return true;
            }
        }

        // have permission on all forums, then we check if this is a Private Forum
        if (allForumsPermission) {
            if (bypassPrivateForum) {
                return true;
            }

            try {
                ForumBean forumBean = ForumCache.getInstance().getBean(forumID);
                if (forumBean.getForumType() == ForumBean.FORUM_TYPE_DEFAULT) {
                    return true;
                }
            } catch (Exception ex) {
                log.error("Cannot get the ForumBean in ForumListPermission", ex);
            }
        }

        // if not found, then we return false (no permission on the forum)
        return false;
    }

    boolean hasPermssionInAnyForums() {

        // now check if have permission on any forums by checking the forumList size
        if (forumList.size() > 0) {
            // forumList size > 0 means there is permission on at least one forum
            return true;
        }

        // have permission on all forums, then we check if this is a Private Forum
        if (allForumsPermission) {
            if (bypassPrivateForum) {
                return true;
            }

            try {
                Collection forumBeans = ForumCache.getInstance().getBeans();
                for (Iterator iter = forumBeans.iterator(); iter.hasNext(); ) {
                    ForumBean forumBean = (ForumBean)iter.next();
                    if (forumBean.getForumType() == ForumBean.FORUM_TYPE_DEFAULT) {
                        return true;
                    }
                }
            } catch (Exception ex) {
                log.error("Cannot get ForumBeans in ForumListPermission", ex);
            }
        }

        // if not found, then we return false (no permission on any forums)
        return false;
    }

    public boolean isBypassPrivateForum() {
        return bypassPrivateForum;
    }

    public void setBypassPrivateForum(boolean ignorePrivateOption) {
        this.bypassPrivateForum = ignorePrivateOption;
    }
}