org.tsm.concharto.web.discuss.DiscussController.java Source code

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Here is the source code for org.tsm.concharto.web.discuss.DiscussController.java

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/*******************************************************************************
 * Copyright 2009 Time Space Map, LLC
 * 
 * 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.tsm.concharto.web.discuss;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.validation.BindException;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;
import org.tsm.concharto.dao.EventDao;
import org.tsm.concharto.model.Event;
import org.tsm.concharto.model.wiki.WikiText;
import org.tsm.concharto.web.wiki.SubstitutionMacro;

public class DiscussController extends SimpleFormController {

    private static final String PARAM_ID = "id";
    private static final String PARAM_DISCUSSION_ID = "discussionId";
    private EventDao eventDao;

    public void setEventDao(EventDao eventDao) {
        this.eventDao = eventDao;
    }

    @Override
    protected Object formBackingObject(HttpServletRequest request) throws Exception {
        Long id = ServletRequestUtils.getLongParameter(request, PARAM_ID);
        Event event = null;
        if (id != null) {
            event = eventDao.findById(id);
            if (null == event.getDiscussion()) {
                //there is no existing discussion, so add a blank one
                event.setDiscussion(new WikiText());
            }
        }
        return new WikiTextForm(event);

    }

    @SuppressWarnings("unchecked")
    @Override
    protected ModelAndView showForm(HttpServletRequest request, HttpServletResponse response, BindException errors,
            Map controlModel) throws Exception {
        Long discussId = ServletRequestUtils.getLongParameter(request, PARAM_DISCUSSION_ID);
        if (discussId != null) {
            //Redirect
            Event event = eventDao.findByDiscussionId(discussId);
            String redirect = request.getContextPath() + '/' + getFormView() + ".htm?id=" + event.getId();
            return new ModelAndView(new RedirectView(redirect, true));
        }
        return new ModelAndView(getFormView(), errors.getModel());
    }

    @Override
    protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command,
            BindException errors) throws Exception {

        //save the wikitext
        WikiTextForm discussion = (WikiTextForm) command;
        if (discussion.getShowPreview()) {
            return new ModelAndView(getFormView(), errors.getModel());
        } else {
            //post process macros.  Later we will probably do something fancier for general macros.
            String substituted = SubstitutionMacro.postSignature(request,
                    discussion.getEvent().getDiscussion().getText());
            discussion.getEvent().getDiscussion().setText(substituted);
            //this isn't new we just need to save the discussion
            eventDao.saveOrUpdate(discussion.getEvent());
            return super.onSubmit(request, response, command, errors);
        }
    }

}