/*
 * Copyright (C) 2003-2004 Red Hat 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
package com.arsdigita.forum;

import com.arsdigita.forum.portlet.MyForumsPortlet;
import com.arsdigita.forum.portlet.RecentPostingsPortlet;
import com.arsdigita.kernel.EmailAddress;
import com.arsdigita.kernel.Kernel;
import com.arsdigita.kernel.KernelExcursion;
// unused?
// import com.arsdigita.kernel.Party;
import com.arsdigita.kernel.User;
import com.arsdigita.kernel.UserCollection;
import com.arsdigita.kernel.permissions.PrivilegeDescriptor;
import com.arsdigita.loader.PackageLoader;
import com.arsdigita.persistence.SessionManager;
import com.arsdigita.portal.PortletType;
import com.arsdigita.portal.apportlet.AppPortletType;
import com.arsdigita.runtime.ScriptContext;
import com.arsdigita.web.ApplicationType;

import org.apache.log4j.Logger;

/**
 * Loader executes nonrecurring at install time and loads (installs and
 * initializes) the Forum module.
 *
 * It loads an application type into database. Detailed configuration is done
 * during initialization at each application start using configuration
 * parameters.
 *
 * @author Justin Ross <jross@redhat.com>
 * @version $Id: Loader.java 1628 2007-09-17 08:10:40Z chrisg23 $
 */
public class Loader extends PackageLoader {

    /** Private logger instance for debugging purpose. */
    private static final Logger s_log = Logger.getLogger(Loader.class);

    public void run(final ScriptContext ctx) {
        new KernelExcursion() {

            public void excurse() {
                setEffectiveParty(Kernel.getSystemParty());

                setupPrivileges();
                setupForumAppType();
                //setupInboxAppType(); //TODO: why it is commented out?
                setupRecentPostingsPortletType();
                setupMyForumsPortletType();
                setupDigestUser();

                SessionManager.getSession().flushAll();
            }
        }.run();
    }

    /**
     * Creates Forum as a legacy-compatible application type.
     * @return
     */
    private static ApplicationType setupForumAppType() {
        ApplicationType type =  ApplicationType
                                .createApplicationType(Forum.PACKAGE_TYPE,
                                                       "Discussion Forum Application",
                                                       Forum.BASE_DATA_OBJECT_TYPE);
        type.setDescription("An electronic bulletin board system.");
        return type;
    }

    /**
     * TODO: What is it for? Execution is currently commented out.
     * Referenced class com.arsdigita.forum.Inbox does not exist.
     * @return
     */
    private static ApplicationType setupInboxAppType() {
        ApplicationType type =
                        ApplicationType.createApplicationType(Forum.PACKAGE_TYPE,
                                                              "Inbox",
                                                              "com.arsdigita.forum.Inbox");
        type.setDescription("Inbox");
        return type;
    }

    /**
     * 
     * @return
     */
    public static AppPortletType setupRecentPostingsPortletType() {
        AppPortletType type =
                       AppPortletType.createAppPortletType(
                "Recent Forum Postings",
                PortletType.WIDE_PROFILE,
                RecentPostingsPortlet.BASE_DATA_OBJECT_TYPE);
        type.setProviderApplicationType(Forum.BASE_DATA_OBJECT_TYPE);
        type.setPortalApplication(true);
        type.setDescription("Displays the most recent postings "
                            + "to the bulletin board.");
        return type;
    }

    public static PortletType setupMyForumsPortletType() {

        PortletType type = PortletType.createPortletType(
                "My Forums",
                PortletType.WIDE_PROFILE,
                MyForumsPortlet.BASE_DATA_OBJECT_TYPE);
        type.setDescription("Lists forums that user has access to, " + ""
                            + "           with last posting date");

        return type;
    }

    /**
     * 
     */
    private static void setupDigestUser() {
        s_log.debug("Setting up the digest user");

        // Email address corresponding to the digest sender, as
        // specified in the configuration file.
        String email = Forum.getConfig().getDigestUserEmail();
        UserCollection users = User.retrieveAll();
        users.addEqualsFilter("primaryEmail", email);
        if (users.next()) {
            s_log.debug("user exists");
        } else {
            s_log.debug("Creating a user with the email " + email);
            User user = new User();
            user.setPrimaryEmail(new EmailAddress(email));
            user.getPersonName().setGivenName("Forum");
            user.getPersonName().setFamilyName("Digest Sender");
            // Fixes a NPE in Loader of ccm-forum if screen_names are being used 
            user.setScreenName("Forum");
            users.close();
        }

    }

    /**
     * 
     */
    public static void setupPrivileges() {

        PrivilegeDescriptor.createPrivilege(Forum.FORUM_READ_PRIVILEGE);
        PrivilegeDescriptor.createPrivilege(Forum.FORUM_MODERATION_PRIVILEGE);
        PrivilegeDescriptor.createPrivilege(Forum.CREATE_THREAD_PRIVILEGE);
        PrivilegeDescriptor.createPrivilege(Forum.RESPOND_TO_THREAD_PRIVILEGE);
        // Establich privilege hierarchie, eg. moderation includes createThread
        PrivilegeDescriptor.addChildPrivilege(Forum.FORUM_MODERATION_PRIVILEGE,
                                              Forum.CREATE_THREAD_PRIVILEGE);
        PrivilegeDescriptor.addChildPrivilege(Forum.CREATE_THREAD_PRIVILEGE,
                                              Forum.RESPOND_TO_THREAD_PRIVILEGE);
        PrivilegeDescriptor.addChildPrivilege(Forum.RESPOND_TO_THREAD_PRIVILEGE,
                                              PrivilegeDescriptor.READ.getName());  // general read privilege
        PrivilegeDescriptor.addChildPrivilege(Forum.RESPOND_TO_THREAD_PRIVILEGE,
                                              Forum.FORUM_READ_PRIVILEGE);
    }
}