/*

 * Copyright (c) JForum Team

 * All rights reserved.

 * 

 * Redistribution and use in source and binary forms, 

 * with or without modification, are permitted provided 

 * that the following conditions are met:

 * 

 * 1) Redistributions of source code must retain the above 

 * copyright notice, this list of conditions and the 

 * following disclaimer.

 * 2) Redistributions in binary form must reproduce the 

 * above copyright notice, this list of conditions and 

 * the following disclaimer in the documentation and/or 

 * other materials provided with the distribution.

 * 3) Neither the name of "Rafael Steil" nor 

 * the names of its contributors may be used to endorse 

 * or promote products derived from this software without 

 * specific prior written permission.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 

 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 

 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 

 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 

 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 

 * IN CONTRACT, STRICT LIABILITY, OR TORT 

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE

 * 

 * Created on 01/10/2011 14:32:22

 * The JForum Project

 * http://www.jforum.net

 */

package net.jforum.api.rest;



import java.util.Date;



import net.jforum.Command;

import net.jforum.JForumExecutionContext;

import net.jforum.SessionFacade;

import net.jforum.context.RequestContext;

import net.jforum.context.ResponseContext;

import net.jforum.dao.DataAccessDriver;

import net.jforum.dao.UserDAO;

import net.jforum.entities.Post;

import net.jforum.entities.Topic;

import net.jforum.entities.User;

import net.jforum.entities.UserSession;

import net.jforum.exceptions.APIException;

import net.jforum.util.I18n;

import net.jforum.util.preferences.ConfigKeys;

import net.jforum.util.preferences.SystemGlobals;

import net.jforum.util.preferences.TemplateKeys;

import net.jforum.view.forum.PostAction;



import org.apache.commons.lang3.StringUtils;



import freemarker.template.SimpleHash;

import freemarker.template.Template;

import net.jforum.repository.PostRepository;



/**

 * @author Andowson Chang

 *

 */

public class PostREST extends Command {



	/* (non-Javadoc)

	 * @see net.jforum.Command#list()

	 */

	@Override

	public void list() {

		try {

			this.authenticate();

			// do nothing here

			// TODO: add implementation

		}

		catch (Exception e) {

			this.setTemplateName(TemplateKeys.API_ERROR);

			this.context.put("exception", e);

		}

	}



	/**

	 * Creates a new post.

	 * Required parameters are "email", "forum_id", "subject" and "message".

	 */

	public void insert()

	{

		try {

			this.authenticate();

			

			final String email = this.requiredRequestParameter("email");

			final String forumId = this.requiredRequestParameter("forum_id");

			final String subject = this.requiredRequestParameter("subject");

			final String message = this.requiredRequestParameter("message");

                        final String topicId = this.request.getParameter("topicId");

                        

                        

			final UserDAO dao = DataAccessDriver.getInstance().newUserDAO();			

			User user = dao.findByEmail(email);

			// If user's email not exists, use anonymous instead

			if (user == null) {

				user = new User();

				user.setId(SystemGlobals.getIntValue(ConfigKeys.ANONYMOUS_USER_ID));

				user.setUsername(I18n.getMessage("Guest"));

			}

			// OK, time to insert the post

			final UserSession userSession = SessionFacade.getUserSession();

			userSession.setUserId(user.getId());

			userSession.setUsername(user.getUsername());

			String sessionId = userSession.getSessionId(); 

			userSession.setStartTime(new Date(System.currentTimeMillis()));

			SessionFacade.makeLogged();



			SessionFacade.removeAttribute(ConfigKeys.LAST_POST_TIME);

			SessionFacade.setAttribute(ConfigKeys.REQUEST_IGNORE_CAPTCHA, "1");



			final Post post = new Post();

			post.setForumId(Integer.valueOf(forumId));

			post.setSubject(subject);

			post.setText(message);

                        

                        // check if it is a reply to a post and if topic Id is not 0

                        if(topicId != null && !topicId.equalsIgnoreCase("")){

                            try{

                                post.setTopicId(Integer.valueOf(topicId));

                            }catch(Exception e){

                              // do nothing here

                            }

                        }

			this.insertMessage(user, post);

			                        

			// new start

			String postLink = JForumExecutionContext.getRedirectTo();

                        JForumExecutionContext.setRedirect(null);

                        if(postLink == null || postLink.equals("")){

                            postLink = "Error";

                        }

                        JForumExecutionContext.getResponse().addHeader("postLink", postLink);

                        this.setTemplateName("api.post.insert");

                        // add a header to the response for the post link

                        this.context.put("postLink", postLink);

                        int numOfPosts = PostRepository.size(post.getTopicId());

                        if(numOfPosts == 0){

                            // not loaded in cache yet, load in cache

                            PostRepository.selectAllByTopicByLimit(post.getTopicId(), 0, 1);

                            // get the number of posts

                            numOfPosts = PostRepository.size(post.getTopicId());

                        }    

                        // add a header for the number of posts

                        JForumExecutionContext.getResponse().addHeader("numOfPosts", String.valueOf(numOfPosts));

                        this.context.put("numOfPosts", String.valueOf(numOfPosts));

                        

			 // new end			

			

			SessionFacade.makeUnlogged();

			SessionFacade.remove(sessionId);			

		}

		catch (Exception e) {

			this.setTemplateName(TemplateKeys.API_ERROR);

			this.context.put("exception", e);

		}

	}

	

	/**

	 * Calls {@link PostAction#insertSave()}

	 * @param post the post

	 * @param user the user who's doing the post

	 */

	private void insertMessage(final User user, final Post post)

	{

		this.addDataToRequest(user, post);

		

		final PostAction postAction = new PostAction(JForumExecutionContext.getRequest(), new SimpleHash());

		postAction.insertSave();

	}

	

	/**

	 * Extracts information from a mail message and adds it to the request context

	 * @param post the post

	 * @param user the user who's doing the post

	 */

	private void addDataToRequest(final User user, final Post post)

	{

		final RequestContext request = JForumExecutionContext.getRequest(); 



		request.addParameter("topic_type", Integer.toString(Topic.TYPE_NORMAL));

		request.addParameter("quick", "1");

		

		final int topicId = post.getTopicId();

		if (topicId > 0) {

			request.addParameter("topic_id", Integer.toString(topicId));

		}

		

		if (!user.isBbCodeEnabled()) {

			request.addParameter("disable_bbcode", "on");

		}

		

		if (!user.isSmiliesEnabled()) {

			request.addParameter("disable_smilies", "on");

		}

		

		if (!user.isHtmlEnabled()) {

			request.addParameter("disable_html", "on");

		}

	}	

	

	/**

	 * Retrieves a parameter from the request and ensures it exists

	 * @param paramName the parameter name to retrieve its value

	 * @return the parameter value

	 * @throws APIException if the parameter is not found or its value is empty

	 */

	private String requiredRequestParameter(final String paramName)

	{

		final String value = this.request.getParameter(paramName);

		

		if (StringUtils.isBlank(value)) {

			throw new APIException("The parameter '" + paramName + "' was not found");

		}

		

		return value;

	}



	/**

	 * Tries to authenticate the user accessing the API

	 * @throws APIException if the authentication fails

	 */

	private void authenticate()

	{

		final String apiKey = this.requiredRequestParameter("api_key");

		

		final RESTAuthentication auth = new RESTAuthentication();

		

		if (!auth.validateApiKey(apiKey)) {

			throw new APIException("The provided API authentication information is not valid");

		}

	}

	

	public Template process(final RequestContext request, final ResponseContext response, final SimpleHash context)

	{

		JForumExecutionContext.setContentType("text/xml");

		return super.process(request, response, context);

	}

}