Working on refactoring. Taking a while and a lot of work

Post.Controller.php

<?php

/**
 * The job of this file is to handle everything related to posting replies,
 * new topics, quotes, and modifications to existing posts.  It also handles
 * quoting posts by way of javascript.
 *
 * @name      ElkArte Forum
 * @copyright ElkArte Forum contributors
 * @license   BSD http://opensource.org/licenses/BSD-3-Clause
 *
 * This software is a derived product, based on:
 *
 * Simple Machines Forum (SMF)
 * copyright:	2011 Simple Machines (http://www.simplemachines.org)
 * license:		BSD, See included LICENSE.TXT for terms and conditions.
 *
 * @version 1.1 dev
 *
 */

if (!defined('ELK'))
	die('No access...');

/**
 * Post Controller
 */
class Post_Controller extends Action_Controller
{
	/**
	 * The post (messages) errors object
	 * @var null|object
	 */
	protected $_post_errors = null;

	/**
	 * The template layers object
	 * @var null|object
	 */
	protected $_template_layers = null;

	/**
	 * An array of attributes of the topic (if not new)
	 * @var mixed[]
	 */
	protected $_topic_attributes = array(
		'locked' => false,
		'notify' => false,
		'is_sticky' => false,
		'id_last_msg' => 0,
		'id_member' => 0,
		'id_first_msg' => 0,
		'subject' => '',
		'last_post_time' => 0
	);

	protected $msg_info = array();
	protected $msg_id;
	protected $topic_info = array();
	protected $topic_id;
	protected $becomes_approved = true;
	protected $max_subject_length = 100;
	protected $previewing = false;

	/**
	 * Sets up common stuff for all or most of the actions.
	 */
	public function pre_dispatch()
	{
		global $context; 
	
		$this->_post_errors = Error_Context::context('post', 1);
		$this->_template_layers = Template_Layers::getInstance();

		require_once(SUBSDIR . '/Post.subs.php');
		require_once(SUBSDIR . '/Messages.subs.php');
		require_once(SUBSDIR . '/Topic.subs.php');

		$this->topic_id = isset($GLOBALS['topic']) ?: (int) $GLOBALS['topic'];
		$this->msg_id = empty($_REQUEST['msg']) ? 0 : (int) $_REQUEST['msg'];
		
		// No need!
		$context['robot_no_index'] = true;
	}

	/**
	 * Dispatch to the right action method for the request.
	 *
	 * @see Action_Controller::action_index()
	 */
	public function action_index()
	{
		// Figure out the right action to do.
		// hint: I'm post controller. :P
		$this->action_post();
	}

	/**
	 * Handles showing the post screen, loading the post to be modified, and loading any post quoted.
	 *
	 * - additionally handles previews of posts.
	 * - requires different permissions depending on the actions, but most notably post_new, post_reply_own, and post_reply_any.
	 * - shows options for the editing and posting of calendar events and attachments, as well as the posting of polls (using modules).
	 * - accessed from ?action=post.
	 *
	 * @uses the Post template and language file, main sub template.
	 */
	public function action_post()
	{
		global $txt, $modSettings, $board, $user_info, $context;

		loadLanguage('Post');
		loadLanguage('Errors');

		$this->_template_layers->add('postarea');

		$this->_events->trigger('prepare_post', array('topic_attributes' => &$this->_topic_attributes));

		// You must be posting to *some* board.
		if (empty($board) && !$context['make_event'])
		{
			Errors::instance()->fatal_lang_error('no_board', false);
		}

		// All those wonderful modifiers and attachments
		$this->_template_layers->add('additional_options', 200);

		// @todo should this moved to a separate function and be done in pre_dispatch()?
		// No message is complete without a topic.
		if (empty($this->topic_id) && !empty($this->msg_id))
		{
			$this->topic_id = associatedTopic($this->msg_id);
			if (empty($this->topic_id))
			{
				unset($_REQUEST['msg'], $_POST['msg'], $_GET['msg']);
			}
		}

		$context['becomes_approved'] = $this->setBecomesApproved();

		// Check if it's locked. It isn't locked if no topic is specified.
		if (!$this->isNewTopic())
		{
			if (empty($this->msg_id) && $user_info['is_guest'] && !allowedTo('post_reply_any') && (!$modSettings['postmod_active'] || !allowedTo('post_unapproved_replies_any')))
			{
				is_not_guest();
			}

			$this->_topic_attributes = topicUserAttributes($this->topic_id, $user_info['id']);

			$context['notify'] = $this->_topic_attributes['notify'];
			$context['topic_last_message'] = $this->_topic_attributes['id_last_msg'];
			$context['can_lock'] = allowedTo('lock_any') || ($user_info['id'] == $this->_topic_attributes['id_member'] && allowedTo('lock_own'));
		}
		else
		{
			if ((!$context['make_event'] || !empty($board)) && !($modSettings['postmod_active'] && !allowedTo('post_new') && allowedTo('post_unapproved_topics')))
			{
				isAllowedTo('post_new');
			}

			// @todo These won't work if you're making an event.
			$context['can_lock'] = allowedTo(array('lock_any', 'lock_own'));
		}

		// Don't allow a post if it's locked and you aren't all powerful.
		if ($this->_topic_attributes['locked'] && !allowedTo('moderate_board'))
		{
			Errors::instance()->fatal_lang_error('topic_locked', false);
		}

		try
		{
			$this->_events->trigger('prepare_context', array('id_member_poster' => $this->_topic_attributes['id_member']));
		}
		catch (Controller_Redirect_Exception $e)
		{
			return $e->doRedirect($this);
		}

		// See if any new replies have come along.
		if ($this->isNewReply() && $this->hasNewRepliesSincePosting())
		{
			$this->newRepliesContext();
		}

		$context['destination'] = 'post2;start=' . $_REQUEST['start'];

		// Previewing, modifying, or posting?
		// Do we have a body, but an error happened.
		if (isset($_REQUEST['message']) || $this->_post_errors->hasErrors())
		{
			// Set up the inputs for the form.
			$form_subject = $this->getSubject(false);
			$form_message = $this->getBody(false);

			// Validate inputs.
			if (!$this->_post_errors->hasErrors())
			{
				// This means they didn't click Post and get an error.
				$this->previewing = true;
			}
			else
			{
				// They are previewing if they asked to preview (i.e. came from quick reply).
				$this->previewing = !empty($_REQUEST['preview']) || isset($_REQUEST['xml']);
			}

			$this->setupPreview();

			if (!$this->isModifyingMessage() && isset($_REQUEST['last_msg']))
			{
				list ($form_subject,) = getFormMsgSubject($this->getEditingCase(), $this->topic_id, $this->_topic_attributes['subject']);
			}
		}
		// Editing a message...
		elseif ($this->isModifyingMessage())
		{
			$message = getFormMsgSubject(1, $this->topic_id, '', $this->msg_id);

			// The message they were trying to edit was most likely deleted.
			if ($message === false)
			{
				Errors::instance()->fatal_lang_error('no_message', false);
			}

			$this->_events->trigger('prepare_editing', array('topic' => $this->topic_id, 'message' => &$message));

			if (!empty($message['errors']))
			{
				foreach ($message['errors'] as $error)
				{
					$this->_post_errors->addError($error);
				}
			}

			censorText($message['message']['subject']);
			censorText(un_preparsecode($message['message']['body']));

			// Get the stuff ready for the form.
			$form_subject = $message['message']['subject'];
			$form_message = $message['message']['body'];

			// Check the boxes that should be checked.
			$context['use_smileys'] = !empty($message['message']['smileys_enabled']);
			$context['icon'] = $message['message']['icon'];

			// Set the destination.
			$context['destination'] .= ';msg=' . $this->msg_id . ';' . $context['session_var'] . '=' . $context['session_id'];
			$context['submit_label'] = $txt['save'];
		}
		// Posting...
		else
		{
			// By default....
			$context['use_smileys'] = true;

			if ($user_info['is_guest'])
			{
				$context['name'] = isset($_SESSION['guest_name']) ? $_SESSION['guest_name'] : '';
				$context['email'] = isset($_SESSION['guest_email']) ? $_SESSION['guest_email'] : '';
			}

			$this->_events->trigger('prepare_posting');

			$context['submit_label'] = $txt['post'];

			list ($form_subject, $form_message) = getFormMsgSubject($this->getEditingCase(), $this->topic_id, $this->_topic_attributes['subject']);
		}

		// Check whether this is a really old post being bumped...
		$this->isOldPost();

		$this->_events->trigger('post_errors');

		// Any errors occurred?
		$context['post_error'] = array(
			'errors' => $this->_post_errors->prepareErrors(),
			'type' => $this->_post_errors->getErrorType() == 0 ? 'minor' : 'serious',
			'title' => $this->_post_errors->getErrorType() == 0 ? $txt['warning_while_submitting'] : $txt['error_while_submitting'],
		);

		// Update the topic summary, needed to show new posts in a preview
		if (!$this->isNewTopic() && !empty($modSettings['topicSummaryPosts']))
		{
			$this->getPreviousPosts();
		}

		// Just ajax previewing then lets stop now
		if (isset($_REQUEST['xml']))
		{
			$context['sub_template'] = 'post';

			// Just in case of an earlier error...
			$context['preview_message'] = '';
			$context['preview_subject'] = '';

			obExit();
		}

		$this->postPageContext($form_subject, $form_message);

		// Register this form in the session variables.
		checkSubmitOnce('register');

		// Finally, load the template.
		loadTemplate('Post');
		$context['sub_template'] = 'post_page';
	}

	/**
	 * Posts or saves the message composed with Post().
	 *
	 * requires various permissions depending on the action.
	 * handles attachment, post, and calendar saving.
	 * sends off notifications, and allows for announcements and moderation.
	 * accessed from ?action=post2.
	 */
	public function action_post2()
	{
		global $board, $context, $user_settings;
		global $user_info, $board_info, $modSettings;

		// Sneaking off, are we?
		if (empty($_POST) && $this->isNewTopic())
		{
			if (empty($_SERVER['CONTENT_LENGTH']))
			{
				redirectexit('action=post;board=' . $board . '.0');
			}
			else
			{
				Errors::instance()->fatal_lang_error('post_upload_error', false);
			}
		}
		elseif (empty($_POST) && !$this->isNewTopic())
		{
			redirectexit('action=post;topic=' . $this->topic_id . '.0');
		}

		// We are now in post2 action
		$context['current_action'] = 'post2';

		// If the session has timed out, let the user re-submit their form.
		if (checkSession('post', '', false) != '')
		{
			$this->_post_errors->addError('session_timeout');

			// Disable the preview so that any potentially malicious code is not executed
			$_REQUEST['preview'] = false;

			return $this->action_post();
		}

		// Previewing? Go back to start.
		if (isset($_REQUEST['preview']))
		{
			return $this->action_post();
		}

		require_once(SUBSDIR . '/Boards.subs.php');
		loadLanguage('Post');

		// Prevent double submission of this form.
		checkSubmitOnce('check');

		// If this isn't a new topic load the topic info that we need.
		if (!$this->isNewTopic())
		{
			$this->getTopicInfo();

			if (!empty($this->topic_info['locked']) && !allowedTo('moderate_board'))
			{
				Errors::instance()->fatal_lang_error('topic_locked', false);
			}

			// Replying to a topic?
			if ($this->isNewReply())
			{
				$this->newReply();
			}
			// Modifying an existing message.
			elseif ($this->isModifyingMessage())
			{

				$this->msg_info = basicMessageInfo($this->msg_id, true);

				if (empty($this->msg_info))
				{
					Errors::instance()->fatal_lang_error('cant_find_messages', false);
				}

				$this->modifyMessage();
			}
		}
		// Posting a new topic.
		else
		{
			$this->newTopic();

			// If the number of replies has changed, if the setting is enabled, go back to action_post() - which handles the error.
			if ($this->hasNewRepliesSincePosting())
			{
				return $this->action_post();
			}
		}

		// If the poster is a guest evaluate the legality of name and email.
		if ($this->posterIsGuest())
		{
			$email = $this->getGuestEmail();
			$guestname = $this->getGuestName();
		}

		try
		{
			$this->_events->trigger('before_save_post', array('post_errors' => $this->_post_errors, 'topic_info' => &$this->topic_info));
		}
		catch (Controller_Redirect_Exception $e)
		{
			return $e->doRedirect($this);
		}

		// Check the subject and message.
		$subject = $this->getSubject();
		$body = $this->getBody();

		// if new message
		if (empty($this->msg_id))
		{
			$guestname = $user_info['username'];
			$email = $user_info['email'];
		}

		// Posting somewhere else? Are we sure you can?
		if (!empty($_REQUEST['post_in_board']))
		{
			$new_board = (int) $_REQUEST['post_in_board'];
			if (!allowedTo('post_new', $new_board))
			{
				$post_in_board = boardInfo($new_board);

				if (!empty($post_in_board))
				{
					$this->_post_errors->addError(array('post_new_board', array($post_in_board['name'])));
				}
				else
				{
					$this->_post_errors->addError('post_new');
				}
			}
		}

		// Any mistakes?
		if ($this->_post_errors->hasErrors())
		{
			return $this->action_post();
		}

		// Make sure the user isn't spamming the board.
		if (!$this->isModifyingMessage())
		{
			spamProtection('post');
		}

		// At about this point, we're posting and that's that.
		ignore_user_abort(true);
		setTimeLimit(300);		

		$msgOptions = $this->getMessageOptions($subject, $body);
		$topicOptions = $this->getTopicOptions(true);
		$posterOptions = $this->getPosterOptions($guestname, $email);

		// @todo move this up higher so the get*Options() requests can load everything?
		// We also have to fake the board:
		// if it's valid and it's not the current, let's forget about the "current" and load the new one
		if (empty($this->msg_id) && !empty($_REQUEST['post_in_board']))
		{
			$new_board = (int) $_REQUEST['post_in_board'];

			if (!empty($new_board) && $board !== $new_board)
			{
				$board = $new_board;
				loadBoard();

				// Some details changed
				$topicOptions['board'] = $board;
				$topicOptions['is_approved'] = !$modSettings['postmod_active'] || empty($this->topic_id) || !empty($board_info['cur_topic_approved']);
				$posterOptions['update_post_count'] = !$user_info['is_guest'] && empty($this->msg_id) && $board_info['posts_count'];
			}
		}

		$this->savePost($msgOptions, $topicOptions, $posterOptions);

		// Marking boards as read.
		// (You just posted and they will be unread.)
		if (!$user_info['is_guest'])
		{
			$board_list = !empty($board_info['parent_boards']) ? array_keys($board_info['parent_boards']) : array();

			// Returning to the topic?
			if (!empty($_REQUEST['goback']))
			{
				$board_list[] = $board;
			}

			if (!empty($board_list))
			{
				markBoardsRead($board_list, false, false);
			}
		}

		// Turn notification on or off.
		if (!empty($_POST['notify']) && allowedTo('mark_any_notify'))
		{
			setTopicNotification($user_info['id'], $this->topic_id, true);
		}
		elseif (!$this->isNewTopic())
		{
			setTopicNotification($user_info['id'], $this->topic_id, false);
		}

		// Log an act of moderation - modifying.
		if (!empty($this->moderationAction))
		{
			logAction('modify', array('topic' => $this->topic_id, 'message' => (int) $this->msg_id, 'member' => $this->msg_info['id_member'], 'board' => $board));
		}

		if (isset($_POST['lock']) && $_POST['lock'] != 2)
		{
			logAction(empty($_POST['lock']) ? 'unlock' : 'lock', array('topic' => $topicOptions['id'], 'board' => $topicOptions['board']));
		}

		if (isset($_POST['sticky']))
		{
			logAction(empty($_POST['sticky']) ? 'unsticky' : 'sticky', array('topic' => $topicOptions['id'], 'board' => $topicOptions['board']));
		}

		// Notify any members who have notification turned on for this topic/board - only do this if it's going to be approved(!)
		if ($this->becomes_approved)
		{
			require_once(SUBSDIR . '/Notification.subs.php');
			if ($this->isNewTopic())
			{
				$notifyData = array(
					'body' => $body,
					'subject' => $subject,
					'name' => $user_info['name'],
					'poster' => $user_info['id'],
					'msg' => $msgOptions['id'],
					'board' => $board,
					'topic' => $this->topic_id,
					'signature' => (isset($user_settings['signature']) ? $user_settings['signature'] : ''),
				);
				sendBoardNotifications($notifyData);
			}
			elseif (empty($this->msg_id))
			{
				// Only send it to everyone if the topic is approved, otherwise just to the topic starter if they want it.
				if ($this->topic_info['approved'])
				{
					sendNotifications($this->topic_id, 'reply');
				}
				else
				{
					sendNotifications($this->topic_id, 'reply', array(), $this->topic_info['id_member_started']);
				}
			}
		}

		if ($board_info['num_topics'] == 0)
		{
			cache_put_data('board-' . $board, null, 120);
		}

		// Now, where do we exit to?
		if (!empty($_POST['announce_topic']))
		{
			redirectexit('action=announce;sa=selectgroup;topic=' . $this->topic_id . (!empty($_POST['move']) && allowedTo('move_any') ? ';move' : '') . (empty($_REQUEST['goback']) ? '' : ';goback'));
		}

		if (!empty($_POST['move']) && allowedTo('move_any'))
		{
			redirectexit('action=movetopic;topic=' . $this->topic_id . '.0' . (empty($_REQUEST['goback']) ? '' : ';goback'));
		}

		// Return to post if the mod is on.
		if (isset($this->msg_id) && !empty($_REQUEST['goback']))
		{
			redirectexit('topic=' . $this->topic_id . '.msg' . $this->msg_id . '#msg' . $this->msg_id, isBrowser('ie'));
		}
		elseif (!empty($_REQUEST['goback']))
		{
			redirectexit('topic=' . $this->topic_id . '.new#new', isBrowser('ie'));
		}
		// Dut-dut-duh-duh-DUH-duh-dut-duh-duh!  *dances to the Final Fantasy Fanfare...*
		else
		{
			redirectexit('board=' . $board . '.0');
		}
	}

	/**
	 * Loads a post and inserts it into the current editing text box.
	 * Used to quick edit a post as well as to quote a post and place it in the quick reply box
	 * Can be used to quick edit just the subject from the topic listing
	 *
	 * uses the Post language file.
	 * uses special (sadly browser dependent) javascript to parse entities for internationalization reasons.
	 * accessed with ?action=quotefast and ?action=quotefast;modify
	 */
	public function action_quotefast()
	{
		global $user_info, $context;

		loadLanguage('Post');

		// @todo check that $_GET['quote'] exists

		// Where we going if we need to?
		$context['post_box_name'] = isset($_GET['pb']) ? $_GET['pb'] : '';

		$row = quoteMessageInfo((int) $_GET['quote'], isset($_GET['modify']));

		$context['sub_template'] = 'quotefast';
		if (!empty($row))
		{
			$can_view_post = $row['approved'] || ($row['id_member'] != 0 && $row['id_member'] == $user_info['id']) || allowedTo('approve_posts', $row['id_board']);
		}

		if (!empty($can_view_post))
		{
			// Remove special formatting we don't want anymore.
			$row['body'] = un_preparsecode($row['body']);

			// Censor the message!
			censorText($row['body']);

			$row['body'] = preg_replace('~<br ?/?' . '>~i', "\n", $row['body']);

			// Want to modify a single message by double clicking it?
			if (isset($_GET['modify']))
			{
				censorText($row['subject']);

				$context['sub_template'] = 'modifyfast';
				$context['message'] = array(
					'id' => $_GET['quote'],
					'body' => $row['body'],
					'subject' => addcslashes($row['subject'], '"'),
				);

				return;
			}

			// Remove any nested quotes.
			$row['body'] = $this->removeNestedQuotes($row['body']);

			// Add a quote string on the front and end.
			$context['quote']['xml'] = '[quote author=' . $row['poster_name'] . ' link=msg=' . (int) $_GET['quote'] . ' date=' . $row['poster_time'] . "]\n" . $row['body'] . "\n[/quote]";
			$context['quote']['text'] = strtr(un_htmlspecialchars($context['quote']['xml']), array('\'' => '\\\'', '\\' => '\\\\', "\n" => '\\n', '</script>' => '</\' + \'script>'));
			$context['quote']['xml'] = strtr($context['quote']['xml'], array('&nbsp;' => '&#160;', '<' => '&lt;', '>' => '&gt;'));

			$context['quote']['mozilla'] = strtr(Util::htmlspecialchars($context['quote']['text']), array('&quot;' => '"'));
		}
		//@todo Needs a nicer interface.
		// In case our message has been removed in the meantime.
		elseif (isset($_GET['modify']))
		{
			$context['sub_template'] = 'modifyfast';
			$context['message'] = array(
				'id' => 0,
				'body' => '',
				'subject' => '',
			);
		}
		else
		{
			$context['quote'] = array(
				'xml' => '',
				'mozilla' => '',
				'text' => '',
			);
		}
	}

	/**
	 * Used to edit the body or subject of a message inline
	 * called from action=jsmodify from script and topic js
	 */
	public function action_jsmodify()
	{
		global $board, $user_info, $context;

		// We have to have a topic!
		if (empty($this->topic_id))
		{
			obExit(false);
		}

		checkSession('get');

		$this->topic_info = getTopicInfoByMsg($this->topic_id, empty($this->msg_id) ? 0 : (int) $this->msg_id);

		if (empty($this->topic_info))
		{
			Errors::instance()->fatal_lang_error('no_board', false);
		}

		// Since getTopicInfoByMsg() has all of the msg_info in it, this saves space.
		$this->msg_info = $this->topic_info;

		// Change either body or subject requires permissions to modify messages.
		if (isset($_POST['message']) || isset($_POST['subject']) || isset($_REQUEST['icon']))
		{
			$this->modifyMessage();
		}

		$subject = $this->getSubject();
		$body = $this->getBody();

		if (!$this->_post_errors->hasErrors())
		{
			$msgOptions = $this->getMessageOptions($subject, $body);
			$topicOptions = $this->getTopicOptions(false);
			$posterOptions = array();

			// Only consider marking as editing if they have edited the subject, message or icon.
			if ((!empty($subject) && $subject != $this->topic_info['subject']) || (!empty($body) && $body != $this->topic_info['body']) || (isset($_REQUEST['icon']) && $_REQUEST['icon'] != $this->topic_info['icon']))
			{
//				// And even then only if the time has passed...
//				if (time() - $this->topic_info['poster_time'] > $modSettings['edit_wait_time'] || $user_info['id'] != $this->topic_info['id_member'])
//				{
//					$msgOptions['modify_time'] = time();
//					$msgOptions['modify_name'] = $user_info['name'];
//				}
			}
			// If nothing was changed there's no need to add an entry to the moderation log.
			if (!(!empty($subject) && $subject != $this->topic_info['subject']) || (!empty($body) && $body != $this->topic_info['body']) || (isset($_REQUEST['icon']) && $_REQUEST['icon'] != $this->topic_info['icon']))
			{
				$this->moderationAction = false;
			}

			modifyPost($msgOptions, $topicOptions, $posterOptions);

			// If we didn't change anything this time but had before put back the old info.
			if (!isset($msgOptions['modify_time']) && !empty($this->topic_info['modified_time']))
			{
				$msgOptions['modify_time'] = $this->topic_info['modified_time'];
				$msgOptions['modify_name'] = $this->topic_info['modified_name'];
			}

			// Changing the first subject updates other subjects to 'Re: new_subject'.
			if (!empty($subject) && isset($_REQUEST['change_all_subjects']) && $this->topic_info['id_first_msg'] == $this->topic_info['id_msg'] && !empty($this->topic_info['num_replies']) && (allowedTo('modify_any') || ($this->topic_info['id_member_started'] == $user_info['id'] && allowedTo('modify_replies'))))
			{
				// Get the proper (default language) response prefix first.
				$context['response_prefix'] = response_prefix();

				topicSubject(array('id_topic' => $this->topic_id, 'id_first_msg' => $this->topic_info['id_first_msg']), $subject, $context['response_prefix'], true);
			}

			if (!empty($this->moderationAction))
			{
				logAction('modify', array('topic' => $this->topic_id, 'message' => $this->topic_info['id_msg'], 'member' => $this->topic_info['id_member'], 'board' => $board));
			}
		}

		if (isset($_REQUEST['xml']))
		{
			$this->jsmodifyXMLContext($msgOptions);
		}
		else
		{
			obExit(false);
		}
	}

	protected function jsmodifyXMLContext($msgOptions)
	{
		$context['sub_template'] = 'modifydone';
		if (!$this->_post_errors->hasErrors() && isset($msgOptions['subject']) && isset($msgOptions['body']))
		{
			$context['message'] = array(
				'id' => $this->topic_info['id_msg'],
				'modified' => array(
					'time' => isset($msgOptions['modify_time']) ? standardTime($msgOptions['modify_time']) : '',
					'html_time' => isset($msgOptions['modify_time']) ? htmlTime($msgOptions['modify_time']) : '',
					'timestamp' => isset($msgOptions['modify_time']) ? forum_time(true, $msgOptions['modify_time']) : 0,
					'name' => isset($msgOptions['modify_time']) ? $msgOptions['modify_name'] : '',
				),
				'subject' => $msgOptions['subject'],
				'first_in_topic' => $this->topic_info['id_msg'] == $this->topic_info['id_first_msg'],
				'body' => strtr($msgOptions['body'], array(']]>' => ']]]]><![CDATA[>')),
			);

			censorText($context['message']['subject']);
			censorText($context['message']['body']);

			$context['message']['body'] = parse_bbc($context['message']['body'], $this->topic_info['smileys_enabled'], $this->topic_info['id_msg']);
		}
		// Topic?
		elseif (!$this->_post_errors->hasErrors())
		{
			$context['sub_template'] = 'modifytopicdone';
			$context['message'] = array(
				'id' => $this->topic_info['id_msg'],
				'modified' => array(
					'time' => isset($msgOptions['modify_time']) ? standardTime($msgOptions['modify_time']) : '',
					'html_time' => isset($msgOptions['modify_time']) ? htmlTime($msgOptions['modify_time']) : '',
					'timestamp' => isset($msgOptions['modify_time']) ? forum_time(true, $msgOptions['modify_time']) : 0,
					'name' => isset($msgOptions['modify_time']) ? $msgOptions['modify_name'] : '',
				),
				'subject' => isset($msgOptions['subject']) ? $msgOptions['subject'] : '',
			);

			censorText($context['message']['subject']);
		}
		else
		{
			$context['message'] = array(
				'id' => $this->topic_info['id_msg'],
				'errors' => array(),
				'error_in_subject' => $this->_post_errors->hasError('no_subject'),
				'error_in_body' => $this->_post_errors->hasError('no_message') || $this->_post_errors->hasError('long_message'),
			);
			$context['message']['errors'] = $this->_post_errors->prepareErrors();
		}
	}

	protected function _checkLocked($lock)
	{
		global $user_info;

		// A new topic
		if (empty($this->topic_info))
		{
			// New topics are by default not locked.
			if (empty($lock))
			{
				return;
			}
			// Besides, you need permission.
			elseif (!allowedTo(array('lock_any', 'lock_own')))
			{
				return;
			}
			// A moderator-lock (1) can override a user-lock (2).
			else
			{
				return allowedTo('lock_any') ? 1 : 2;
			}
		}

		// Nothing changes to the lock status.
		if ((empty($lock) && empty($this->topic_info['locked'])) || (!empty($lock) && !empty($this->topic_info['locked'])))
		{
			return;
		}
		// You're simply not allowed to (un)lock this.
		elseif (!allowedTo(array('lock_any', 'lock_own')) || (!allowedTo('lock_any') && $user_info['id'] != $this->topic_info['id_member_started']))
		{
			return;
		}
		// You're only allowed to lock your own topics.
		elseif (!allowedTo('lock_any'))
		{
			// You're not allowed to break a moderator's lock.
			if ($this->topic_info['locked'] == 1)
			{
				return;
			}
			// Lock it with a soft lock or unlock it.
			else
			{
				$lock = empty($lock) ? 0 : 2;
			}
		}
		// You must be the moderator.
		else
		{
			$lock = empty($lock) ? 0 : 1;
		}

		return $lock;
	}

	protected function newTopic()
	{
		// Now don't be silly, new topics will get their own id_msg soon enough.
		unset($_REQUEST['msg'], $_POST['msg'], $_GET['msg']);

		// Do like, the permissions, for safety and stuff...
		$this->setBecomesApproved();

		$this->_events->trigger('save_new_topic', array('becomes_approved' => &$this->becomes_approved));
	}
	
	protected function newReply()
	{
		$this->setBecomesApproved();

		// So you wanna (un)sticky this...let's see.
		if (isset($_POST['sticky']) && ($_POST['sticky'] == $this->topic_info['is_sticky'] || !allowedTo('make_sticky')))
		{
			unset($_POST['sticky']);
		}

		$this->_events->trigger('save_replying', array('topic_info' => &$this->topic_info));
	}

	protected function modifyMessage()
	{
		global $modSettings, $user_info;

		$this->_events->trigger('save_modify', array('msgInfo' => &$this->msg_info));

		if ($this->msg_info['id_member'] == $user_info['id'] && !allowedTo('modify_any'))
		{
			if ((!$modSettings['postmod_active'] || $this->msg_info['approved']) && !empty($modSettings['edit_disable_time']) && $this->msg_info['poster_time'] + ($modSettings['edit_disable_time'] + 5) * 60 < time())
			{
				Errors::instance()->fatal_lang_error('modify_post_time_passed', false);
			}
			elseif ($this->topic_info['id_member_started'] == $user_info['id'] && !allowedTo('modify_own'))
			{
				isAllowedTo('modify_replies');
			}
			else
			{
				isAllowedTo('modify_own');
			}
		}
		elseif ($this->topic_info['id_member_started'] == $user_info['id'] && !allowedTo('modify_any'))
		{
			isAllowedTo('modify_replies');

			// If you're modifying a reply, I say it better be logged...
			$this->moderationAction = true;
		}
		else
		{
			isAllowedTo('modify_any');

			// Log it, assuming you're not modifying your own post.
			if ($this->msg_info['id_member'] != $user_info['id'])
			{
				$this->moderationAction = true;
			}
		}

		if (!allowedTo('moderate_forum') || !$this->posterIsGuest())
		{
			$_POST['guestname'] = $this->msg_info['poster_name'];
			$_POST['email'] = $this->msg_info['poster_email'];
		}
	}

	public function isNewTopic()
	{
		return empty($GLOBALS['topic']);
	}

	public function isNewReply()
	{
		return !$this->isNewTopic() && empty($this->msg_id);
	}

	public function isModifyingMessage()
	{
		return !empty($this->msg_id) && !$this->isNewTopic();
	}

	protected function getTopicInfo()
	{
		global $board;

		$this->topic_info = getTopicInfo($this->topic_id);

		$this->_events->trigger('prepare_save_post', array('topic_info' => &$this->topic_info));

		// Though the topic should be there, it might have vanished.
		if (empty($this->topic_info))
		{
			Errors::instance()->fatal_lang_error('topic_doesnt_exist');
		}

		// Did this topic suddenly move? Just checking...
		if ($this->topic_info['id_board'] != $board)
		{
			Errors::instance()->fatal_lang_error('not_a_topic');
		}

		return $this->topic_info;
	}

	protected function getSubject($validate = true)
	{
		if ($validate && (!isset($_REQUEST['subject']) || Util::htmltrim(Util::htmlspecialchars($_REQUEST['subject'])) === ''))
		{
			$this->_post_errors->addError('no_subject');
		}
		else
		{
			$subject = !isset($_REQUEST['subject']) ? '' : $_REQUEST['subject'];
			return $this->filterSubject($subject);
		}
	}

	protected function filterSubject($subject)
	{
		$subject = strtr(Util::htmlspecialchars($subject), array("\r" => '', "\n" => '', "\t" => ''));

		// Make sure the subject isn't too long - taking into account special characters.
		if (Util::strlen($subject) > $this->max_subject_length)
		{
			$subject = Util::substr($subject, 0, $this->max_subject_length);
		}

		return $subject;
	}

	/**
	 * 
	 * @return string
	 */
	protected function getBody($validate = false)
	{
		global $modSettings, $user_info;

		if (!isset($_REQUEST['message']))
		{
			if ($validate)
			{
				$this->_post_errors->addError('no_message');
			}

			return '';
		}

		$body = Util::htmltrim(Util::htmlspecialchars($_REQUEST['message'], ENT_QUOTES));

		if (!empty($modSettings['max_messageLength']) && Util::strlen($_REQUEST['message']) > $modSettings['max_messageLength'])
		{
			if ($validate)
			{
				$this->_post_errors->addError(array('long_message', array($modSettings['max_messageLength'])));
			}
		}
		else
		{
			// Prepare the message a bit for some additional testing.
			//$body = Util::htmlspecialchars($_REQUEST['message'], ENT_QUOTES);

			// Preparse code. (Zef)
			if ($user_info['is_guest'])
			{
				$user_info['name'] = $_REQUEST['guestname'];
			}

			preparsecode($body);

			// Let's see if there's still some content left without the tags.
			if ($validate && Util::htmltrim(strip_tags(parse_bbc($body, false), '<img>')) === '' && (!allowedTo('admin_forum') || strpos($body, '[html]') === false))
			{
				$this->_post_errors->addError('no_message');
			}
		}

		return $body;
	}

	/**
	 * 
	 * @return string
	 */
	protected function getGuestName($validate = true)
	{
		$guestname = !isset($_REQUEST['guestname']) ? '' : Util::htmlspecialchars(trim($_REQUEST['guestname']));

		if ($validate)
		{
			$this->validateGuestName($guestname);
		}

		return $guestname;
	}

	protected function validateGuestName($guestname)
	{
		if ($guestname == '' || $guestname == '_')
		{
			$this->_post_errors->addError('no_name');
		}

		if (Util::strlen($guestname) > 25)
		{
			$this->_post_errors->addError('long_name');
		}

		// If user is a guest, make sure the chosen name isn't taken.
		require_once(SUBSDIR . '/Members.subs.php');
		if (isReservedName($guestname, 0, true, false) && (!isset($this->msg_info['poster_name']) || $guestname != $this->msg_info['poster_name']))
		{
			$this->_post_errors->addError('bad_name');
		}

		// In case they are making multiple posts this visit, help them along by storing their name.
		if (!$this->_post_errors->hasErrors())
		{
			$_SESSION['guest_name'] = $guestname;
		}
	}

	/**
	 * 
	 * @return string
	 */
	public function getGuestEmail($validate = true)
	{
		global $modSettings, $txt;

		$email = !isset($_REQUEST['email']) ? '' : Util::htmlspecialchars(trim($_REQUEST['email']));

		if (!$validate)
		{
			return $email;
		}

		if (empty($modSettings['guest_post_no_email']))
		{
			// Only check if they changed it!
			if (!isset($this->msg_info) || $this->msg_info['poster_email'] != $email)
			{
				if (!allowedTo('moderate_forum') && !Data_Validator::is_valid($_POST, array('email' => 'valid_email|required'), array('email' => 'trim')))
				{
					empty($email) ? $this->_post_errors->addError('no_email') : $this->_post_errors->addError('bad_email');
				}
			}

			// Now make sure this email address is not banned from posting.
			isBannedEmail($email, 'cannot_post', sprintf($txt['you_are_post_banned'], $txt['guest_title']));
		}

		if (!$this->_post_errors->hasErrors())
		{
			$_SESSION['guest_email'] = $email;
		}

		return $email;
	}

	/**
	 * 
	 * @return bool
	 */
	protected function posterIsGuest()
	{
		global $user_info;

		if ($this->isModifyingMessage())
		{
			$posterIsGuest = empty($this->msg_info['id_member']);
		}
		else
		{
			$posterIsGuest = $user_info['is_guest'];
		}

		return $posterIsGuest;
	}

	/**
	 * 
	 * @return int
	 */
	protected function getEditingCase()
	{
		global $modSettings;

		// @todo: sort out what kind of combinations are actually possible
		// Posting a quoted reply?
		if ((!empty($this->topic_id) && !empty($_REQUEST['quote'])) || (!empty($modSettings['enableFollowup']) && !empty($_REQUEST['followup'])))
		{
			$case = 2;
		}
		// Posting a reply without a quote?
		elseif (!empty($this->topic_id) && empty($_REQUEST['quote']))
		{
			$case = 3;
		}
		else
		{
			$case = 4;
		}

		return $case;
	}

	protected function getMessageOptions($subject, $body)
	{
		global $modSettings, $user_info;

		$msgOptions = array(
			'id' => $this->msg_id,
			'subject' => $subject,
			'body' => $body,
			'icon' => $this->getIcon(),
			'smileys_enabled' => !isset($_POST['ns']),
			'approved' => $this->becomes_approved,
		);

		if (!$this->isModifyingMessage())
		{
			// Have admins allowed people to hide their screwups?
			if (time() - $this->msg_info['poster_time'] > $modSettings['edit_wait_time'] || $user_info['id'] != $this->msg_info['id_member'])
			{
				$msgOptions['modify_time'] = time();
				$msgOptions['modify_name'] = $user_info['name'];
			}
			// If we didn't change anything this time but had before put back the old info.
			elseif (!empty($this->topic_info['modified_time']))
			{
				$msgOptions['modify_time'] = $this->topic_info['modified_time'];
				$msgOptions['modify_name'] = $this->topic_info['modified_name'];
			}

			// This will save some time...
			if ($this->msg_info['approved'] != $this->becomes_approved)
			{
				unset($msgOptions['approved']);
			}
		}

		return $msgOptions;
	}

	protected function getTopicOptions($mark_as_read)
	{
		global $board, $modSettings, $board_info;

		$lock = isset($_POST['lock']) ?: $this->_checkLocked($_POST['lock'], $this->topic_info);

		// Sticky can be null (no change), 1 sticky, 0 not sticky
		$sticky = null;
		if (isset($_POST['sticky']) && allowedTo('make_sticky'))
		{
			$sticky = (int) $_POST['sticky'];
		}

		$topicOptions = array(
			'id' => empty($this->topic_id) ? 0 : $this->topic_id,
			'board' => $board,
			'lock_mode' => $lock,
			'sticky_mode' => $sticky,
			'mark_as_read' => $mark_as_read,
			'is_approved' => !$modSettings['postmod_active'] || empty($this->topic_id) || !empty($board_info['cur_topic_approved']),
		);

		return $topicOptions;
	}

	public function savePost($msgOptions, $topicOptions, $posterOptions)
	{
		$this->_events->trigger('pre_save_post', array('msgOptions' => &$msgOptions, 'topicOptions' => &$topicOptions, 'posterOptions' => &$posterOptions));

		// This is an already existing message. Edit it.
		if (!empty($this->msg_id))
		{
			modifyPost($msgOptions, $topicOptions, $posterOptions);
		}
		// This is a new topic or an already existing one. Save it.
		else
		{
			createPost($msgOptions, $topicOptions, $posterOptions);

			if (isset($topicOptions['id']))
			{
				$this->topic_id = $topicOptions['id'];
			}
		}

		$this->_events->trigger('after_save_post', array('msgOptions' => $msgOptions, 'topicOptions' => $topicOptions, 'becomes_approved' => $this->becomes_approved, 'posterOptions' => $posterOptions));

	}

	protected function setBecomesApproved()
	{
		global $modSettings, $user_info;

		// If no postmod, it is always approved.
		if (!$modSettings['postmod_active'])
		{
			return true;
		}

		if ($this->isModifyingMessage())
		{
			$this->becomes_approved = (allowedTo('approve_posts') && !$this->msgInfo['approved'] ? (!empty($_REQUEST['approve']) ? true : false) : $$this->msgInfo['approved']);
			return $this->becomes_approved;
		}

		// In case we want to override
		if (allowedTo('approve_posts'))
		{
			$this->becomes_approved = !isset($_REQUEST['approve']) || !empty($_REQUEST['approve']) ? true : false;
			return $this>becomes_approved;
		}

		if($this->isNewTopic())
		{
			if (!allowedTo('post_new') && allowedTo('post_unapproved_topics'))
			{
				$this->becomes_approved = false;
			}
			else
			{
				isAllowedTo('post_new');
			}

			return $this->becomes_approved;
		}
		
		// Lastly, a new reply
		if ($this->topic_info['id_member_started'] != $user_info['id'])
		{
			if (allowedTo('post_unapproved_replies_any') && !allowedTo('post_reply_any'))
			{
				$this->becomes_approved = false;
			}
			else
			{
				isAllowedTo('post_reply_any');
			}
		}
		elseif (!allowedTo('post_reply_any'))
		{
			if (allowedTo('post_unapproved_replies_own') && !allowedTo('post_reply_own'))
			{
				$this->becomes_approved = false;
			}
			// Guests do not have post_unapproved_replies_own permission, so it's always post_unapproved_replies_any
			elseif ($user_info['is_guest'] && allowedTo('post_unapproved_replies_any'))
			{
				$this->becomes_approved = false;
			}
			else
			{
				isAllowedTo('post_reply_own');
			}
		}

		return $this->becomes_approved;
	}

	/**
	 * 
	 * @param string $name
	 * @param string $email
	 * @return array
	 */
	protected function getPosterOptions($name, $email)
	{
		global $user_info, $board_info;

		$posterOptions = array(
			'id' => $user_info['id'],
			'name' => $name,
			'email' => $email,
			'update_post_count' => !$user_info['is_guest'] && empty($this->msg_id) && $board_info['posts_count'],
		);

		return $posterOptions;
	}

	public function removeNestedQuotes($string)
	{
		global $modSettings;

		if (!empty($modSettings['removeNestedQuotes']))
		{
			$string = preg_replace(array('~\n?\[quote.*?\].+?\[/quote\]\n?~is', '~^\n~', '~\[/quote\]~'), '', $string);
		}

		return $string;
	}

	public function isOldPost()
	{
		global $modSettings;

		if (!empty($this->topic_id) && !empty($modSettings['oldTopicDays']) && $this->_topic_attributes['last_post_time'] + $modSettings['oldTopicDays'] * 86400 < time() && empty($this->_topic_attributes['is_sticky']) && !isset($_REQUEST['subject']))
		{
			$this->_post_errors->addError(array('old_topic', array($modSettings['oldTopicDays'])), 0);
		}
	}

	public function hasNewRepliesSincePosting()
	{
		global $options;

		return empty($options['no_new_reply_warning']) && isset($_REQUEST['last_msg']) && $this->topic_info['id_last_msg'] > $_REQUEST['last_msg'];
	}

	protected function newRepliesContext()
	{
		global $context, $txt, $modSettings;

		addInlineJavascript('
			$(document).ready(function () {
				$("html,body").scrollTop($(\'.category_header:visible:first\').offset().top);
			});'
		);

		$context['new_replies'] = countMessagesSince($this->topic_id, (int) $_REQUEST['last_msg'], false, $modSettings['postmod_active'] && !allowedTo('approve_posts'));

		if (!empty($context['new_replies']))
		{
			if ($context['new_replies'] == 1)
			{
				$txt['error_new_replies'] = !empty($_REQUEST['last_msg']) ? $txt['error_new_reply_reading'] : $txt['error_new_reply'];
			}
			else
			{
				$txt['error_new_replies'] = sprintf(isset($_REQUEST['last_msg']) ? $txt['error_new_replies_reading'] : $txt['error_new_replies'], $context['new_replies']);
			}

			$this->_post_errors->addError('new_replies', 0);

			$modSettings['topicSummaryPosts'] = $context['new_replies'] > $modSettings['topicSummaryPosts'] ? max($modSettings['topicSummaryPosts'], 5) : $modSettings['topicSummaryPosts'];
		}
	}

	public function getPreviousPosts()
	{
		global $context, $modSettings, $user_info;

		if (isset($_REQUEST['xml']))
		{
			$limit = empty($context['new_replies']) ? 0 : (int) $context['new_replies'];
		}
		else
		{
			$limit = $modSettings['topicSummaryPosts'];
		}

		$before = $this->isModifyingMessage() ? array('before' => (int) $this->msg_id) : array();
		$only_approved = $modSettings['postmod_active'] && !allowedTo('approve_posts');

		$counter = 0;
		$context['previous_posts'] = empty($limit) ? array() : selectMessages($this->topic_id, 0, $limit, $before, $only_approved);
		foreach ($context['previous_posts'] as &$post)
		{
			$post['is_new'] = !empty($context['new_replies']);
			$post['counter'] = $counter++;
			$post['is_ignored'] = !empty($modSettings['enable_buddylist']) && in_array($post['id_poster'], $user_info['ignoreusers']);

			if (!empty($context['new_replies']))
			{
				$context['new_replies']--;
			}
		}
	}

	protected function iconContext()
	{
		global $board, $context;

		// Message icons - customized or not, retrieve them...
		$context['icons'] = getMessageIcons($board);

		$context['icon_url'] = '';

		if (!empty($context['icons']))
		{
			$context['icons'][count($context['icons']) - 1]['is_last'] = true;
			$context['icons'][0]['selected'] = true;
			// $context['icon'] is set when editing a message
			if (!isset($context['icon']))
			{
				$context['icon'] = $context['icons'][0]['value'];
			}
			$found = false;
			foreach ($context['icons'] as $icon)
			{
				if ($icon['value'] === $context['icon'])
				{
					$found = true;
					$context['icon_url'] = $icon['url'];
					break;
				}
			}
			// Failsafe
			if (!$found)
			{
				$context['icon'] = $context['icons'][0]['value'];
				$context['icon_url'] = $context['icons'][0]['url'];
			}
		}
	}

	public function previewContext($subject, $body)
	{
		global $context, $modSettings, $txt;

		// Set up the preview message and subject
		$context['preview_message'] = $body;
		preparsecode($body, true);

		// Do all bulletin board code thing on the message
		preparsecode($context['preview_message']);
		$context['preview_message'] = parse_bbc($context['preview_message'], isset($_REQUEST['ns']) ? 0 : 1);
		censorText($context['preview_message']);

		// Don't forget the subject
		$context['preview_subject'] = $subject;
		censorText($context['preview_subject']);

		// Any errors we should tell them about?
		if ($subject === '')
		{
			$this->_post_errors->addError('no_subject');
			$context['preview_subject'] = '<em>' . $txt['no_subject'] . '</em>';
		}

		if ($context['preview_message'] === '')
		{
			$this->_post_errors->addError('no_message');
		}
		elseif (!empty($modSettings['max_messageLength']) && Util::strlen($body) > $modSettings['max_messageLength'])
		{
			$this->_post_errors->addError(array('long_message', array($modSettings['max_messageLength'])));
		}

		// Protect any CDATA blocks.
		if (isset($_REQUEST['xml']))
		{
			$context['preview_message'] = strtr($context['preview_message'], array(']]>' => ']]]]><![CDATA[>'));
		}
	}

	protected function getIcon()
	{
		return isset($_REQUEST['icon']) ? preg_replace('~[\./\\\\*\':"<>]~', '', $_REQUEST['icon']) : 'xx';
	}

	protected function getEditorOptions()
	{
		global $context;

		return array(
			'id' => 'message',
			'value' => $context['message'],
			'labels' => array(
				'post_button' => $context['submit_label'],
			),
			// add height and width for the editor
			'height' => '275px',
			'width' => '100%',
			// We do XML preview here.
			'preview_type' => 2
		);
	}

	protected function postPageContext($subject, $body)
	{
		global $context, $scripturl, $txt, $modSettings;

		// This is done for the editor
		$context['subject'] = addcslashes($subject, '"');
		$context['message'] = str_replace(array('"', '<', '>', '&nbsp;'), array('&quot;', '&lt;', '&gt;', ' '), $body);

		// Get a response prefix (like 'Re:') in the default forum language.
		$context['response_prefix'] = response_prefix();

		// @todo These won't work if you're posting an event!
		// Premissions
		$context['can_notify'] = allowedTo('mark_any_notify');
		$context['can_move'] = allowedTo('move_any');
		$context['can_sticky'] = allowedTo('make_sticky');
		$context['can_announce'] = allowedTo('announce_topic') && $context['becomes_approved'];
		$context['can_quote'] = empty($modSettings['disabledBBC']) || !in_array('quote', explode(',', $modSettings['disabledBBC']));

		$context['move'] = !empty($_REQUEST['move']);
		$context['announce'] = !empty($_REQUEST['announce']);
		$context['sticky'] = isset($_REQUEST['sticky']) ? !empty($_REQUEST['sticky']) : $this->_topic_attributes['is_sticky'];

		$context['notify'] = !empty($context['notify']);

		// You can only announce topics that will get approved...
		$context['locked'] = !empty($this->_topic_attributes['locked']) || !empty($_REQUEST['lock']);

		// Generally don't show the approval box... (Assume we want things approved)
		$context['show_approval'] = allowedTo('approve_posts') && $context['becomes_approved'] ? 2 : (allowedTo('approve_posts') ? 1 : 0);

		// Build the link tree.
		if (empty($this->topic_id))
		{
			$context['linktree'][] = array(
				'name' => '<em>' . $txt['start_new_topic'] . '</em>'
			);
		}
		else
		{
			$context['linktree'][] = array(
				'url' => $scripturl . '?topic=' . $this->topic_id . '.' . $_REQUEST['start'],
				'name' => $context['subject'],
				'extra_before' => '<span><strong class="nav">' . $context['page_title'] . ' ( </strong></span>',
				'extra_after' => '<span><strong class="nav"> )</strong></span>'
			);
		}

		// What are you doing? Posting, modifying, previewing, new post, or reply...
		if (empty($context['page_title']))
		{
			if ($this->isModifyingMessage())
			{
				$context['page_title'] = $txt['modify_msg'];
			}
			elseif (isset($_REQUEST['subject'], $context['preview_subject']))
			{
				$context['page_title'] = $txt['post_reply'];
			}
			elseif ($this->isNewTopic())
			{
				$context['page_title'] = $txt['start_new_topic'];
			}
			else
			{
				$context['page_title'] = $txt['post_reply'];
			}
		}

		$context['back_to_topic'] = isset($_REQUEST['goback']) || (!empty($this->msg_id) && !isset($_REQUEST['subject']));
		$context['is_new_topic'] = $this->isNewTopic();
		$context['is_new_post'] = $this->isNewReply();
		$context['is_first_post'] = $context['is_new_topic'] || (!empty($this->msg_id) && $this->msg_id == $this->_topic_attributes['id_first_msg']);
		$context['current_action'] = 'post';

		// Needed for the editor and message icons.
		require_once(SUBSDIR . '/Editor.subs.php');

		// Now create the editor.
		$editorOptions = $this->getEditorOptions();

		$this->iconContext();

		$context['show_additional_options'] = !empty($_REQUEST['additional_options']);

		$this->_events->trigger('finalize_post_form', array('editorOptions' => &$editorOptions));

		create_control_richedit($editorOptions);
	}

	public function setupPreview()
	{
		global $context, $user_info, $txt;

		$this->_events->trigger('prepare_modifying', array('post_errors' => $this->_post_errors, 'really_previewing' => &$this->previewing));

		// In order to keep the approval status flowing through, we have to pass it through the form...
		$context['becomes_approved'] = empty($_REQUEST['not_approved']);
		$context['show_approval'] = isset($_REQUEST['approve']) ? ($_REQUEST['approve'] ? 2 : 1) : 0;
		$context['can_announce'] &= $context['becomes_approved'];

		// Are you... a guest?
		if ($user_info['is_guest'])
		{
			$context['name'] = $this->getGuestName(false);
			$context['email'] = $this->getGuestEmail(false);
			$user_info['name'] = $context['name'];
		}

		// Only show the preview stuff if they hit Preview.
		if ($this->previewing === true)
		{
			$this->previewContext($form_subject, $form_message);
		}

		// Set up the checkboxes.
		$context['notify'] = !empty($_REQUEST['notify']);
		$context['use_smileys'] = !isset($_REQUEST['ns']);
		$context['icon'] = $this->getIcon();

		// Set the destination action for submission.
		$context['destination'] .= !empty($this->msg_id) ? ';msg=' . $this->msg_id . ';' . $context['session_var'] . '=' . $context['session_id'] : '';
		$context['submit_label'] = !empty($this->msg_id) ? $txt['save'] : $txt['post'];

		// Previewing an edit?
		if ($this->isModifyingMessage())
		{
			// Get the existing message.
			$message = messageDetails((int) $this->msg_id, $this->topic_id);

			// The message they were trying to edit was most likely deleted.
			// @todo Change this error message?
			if ($message === false)
			{
				Errors::instance()->fatal_lang_error('no_board', false);
			}

			$errors = checkMessagePermissions($message['message']);
			if (!empty($errors))
			{
				foreach ($errors as $error)
				{
					$this->_post_errors->addError($error);
				}
			}

			prepareMessageContext($message);
		}

		// No check is needed, since nothing is really posted.
		checkSubmitOnce('free');
	}
}