/Sources/Post.php

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<?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.
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2012 Simple Machines
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 Alpha 1
 */

if (!defined('SMF'))
	die('Hacking attempt...');

/**
 * Handles showing the post screen, loading the post to be modified, and loading any post quoted.
 *
 * - additionally handles previews of posts.
 * - @uses the Post template and language file, main sub template.
 * - allows wireless access using the protocol_post sub template.
 * - 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.
 * - accessed from ?action=post.
 *
 *  @param array $post_errors holds any errors found tyring to post
 */
function Post($post_errors = array())
{
	global $txt, $scripturl, $topic, $modSettings, $board;
	global $user_info, $sc, $board_info, $context, $settings;
	global $sourcedir, $options, $smcFunc, $language;

	loadLanguage('Post');

	// You can't reply with a poll... hacker.
	if (isset($_REQUEST['poll']) && !empty($topic) && !isset($_REQUEST['msg']))
		unset($_REQUEST['poll']);

	// Posting an event?
	$context['make_event'] = isset($_REQUEST['calendar']);
	$context['robot_no_index'] = true;

	// You must be posting to *some* board.
	if (empty($board) && !$context['make_event'])
		fatal_lang_error('no_board', false);

	require_once($sourcedir . '/Subs-Post.php');

	if (isset($_REQUEST['xml']))
	{
		$context['sub_template'] = 'post';

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

	// No message is complete without a topic.
	if (empty($topic) && !empty($_REQUEST['msg']))
	{
		$request = $smcFunc['db_query']('', '
			SELECT id_topic
			FROM {db_prefix}messages
			WHERE id_msg = {int:msg}',
			array(
				'msg' => (int) $_REQUEST['msg'],
		));
		if ($smcFunc['db_num_rows']($request) != 1)
			unset($_REQUEST['msg'], $_POST['msg'], $_GET['msg']);
		else
			list ($topic) = $smcFunc['db_fetch_row']($request);
		$smcFunc['db_free_result']($request);
	}

	// Check if it's locked. It isn't locked if no topic is specified.
	if (!empty($topic))
	{
		$request = $smcFunc['db_query']('', '
			SELECT
				t.locked, IFNULL(ln.id_topic, 0) AS notify, t.is_sticky, t.id_poll, t.id_last_msg, mf.id_member,
				t.id_first_msg, mf.subject,
				CASE WHEN ml.poster_time > ml.modified_time THEN ml.poster_time ELSE ml.modified_time END AS last_post_time
			FROM {db_prefix}topics AS t
				LEFT JOIN {db_prefix}log_notify AS ln ON (ln.id_topic = t.id_topic AND ln.id_member = {int:current_member})
				LEFT JOIN {db_prefix}messages AS mf ON (mf.id_msg = t.id_first_msg)
				LEFT JOIN {db_prefix}messages AS ml ON (ml.id_msg = t.id_last_msg)
			WHERE t.id_topic = {int:current_topic}
			LIMIT 1',
			array(
				'current_member' => $user_info['id'],
				'current_topic' => $topic,
			)
		);
		list ($locked, $context['notify'], $sticky, $pollID, $context['topic_last_message'], $id_member_poster, $id_first_msg, $first_subject, $lastPostTime) = $smcFunc['db_fetch_row']($request);
		$smcFunc['db_free_result']($request);

		// If this topic already has a poll, they sure can't add another.
		if (isset($_REQUEST['poll']) && $pollID > 0)
			unset($_REQUEST['poll']);

		if (empty($_REQUEST['msg']))
		{
			if ($user_info['is_guest'] && !allowedTo('post_reply_any') && (!$modSettings['postmod_active'] || !allowedTo('post_unapproved_replies_any')))
				is_not_guest();

			// By default the reply will be approved...
			$context['becomes_approved'] = true;
			if ($id_member_poster != $user_info['id'])
			{
				if ($modSettings['postmod_active'] && allowedTo('post_unapproved_replies_any') && !allowedTo('post_reply_any'))
					$context['becomes_approved'] = false;
				else
					isAllowedTo('post_reply_any');
			}
			elseif (!allowedTo('post_reply_any'))
			{
				if ($modSettings['postmod_active'] && allowedTo('post_unapproved_replies_own') && !allowedTo('post_reply_own'))
					$context['becomes_approved'] = false;
				else
					isAllowedTo('post_reply_own');
			}
		}
		else
			$context['becomes_approved'] = true;

		$context['can_lock'] = allowedTo('lock_any') || ($user_info['id'] == $id_member_poster && allowedTo('lock_own'));
		$context['can_sticky'] = allowedTo('make_sticky') && !empty($modSettings['enableStickyTopics']);

		$context['notify'] = !empty($context['notify']);
		$context['sticky'] = isset($_REQUEST['sticky']) ? !empty($_REQUEST['sticky']) : $sticky;

		// Check whether this is a really old post being bumped...
		if (!empty($modSettings['oldTopicDays']) && $lastPostTime + $modSettings['oldTopicDays'] * 86400 < time() && empty($sticky) && !isset($_REQUEST['subject']))
			$post_errors[] = array('old_topic', array($modSettings['oldTopicDays']));
	}
	else
	{
		$context['becomes_approved'] = true;
		if ((!$context['make_event'] || !empty($board)))
		{
			if ($modSettings['postmod_active'] && !allowedTo('post_new') && allowedTo('post_unapproved_topics'))
				$context['becomes_approved'] = false;
			else
				isAllowedTo('post_new');
		}

		$locked = 0;

		// @todo These won't work if you're making an event.
		$context['can_lock'] = allowedTo(array('lock_any', 'lock_own'));
		$context['can_sticky'] = allowedTo('make_sticky') && !empty($modSettings['enableStickyTopics']);

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

	// @todo These won't work if you're posting an event!
	$context['can_notify'] = allowedTo('mark_any_notify');
	$context['can_move'] = allowedTo('move_any');
	$context['move'] = !empty($_REQUEST['move']);
	$context['announce'] = !empty($_REQUEST['announce']);
	// You can only announce topics that will get approved...
	$context['can_announce'] = allowedTo('announce_topic') && $context['becomes_approved'];
	$context['locked'] = !empty($locked) || !empty($_REQUEST['lock']);
	$context['can_quote'] = empty($modSettings['disabledBBC']) || !in_array('quote', explode(',', $modSettings['disabledBBC']));

	// 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);

	// An array to hold all the attachments for this topic.
	$context['current_attachments'] = array();

	// Don't allow a post if it's locked and you aren't all powerful.
	if ($locked && !allowedTo('moderate_board'))
		fatal_lang_error('topic_locked', false);
	// Check the users permissions - is the user allowed to add or post a poll?
	if (isset($_REQUEST['poll']) && $modSettings['pollMode'] == '1')
	{
		// New topic, new poll.
		if (empty($topic))
			isAllowedTo('poll_post');
		// This is an old topic - but it is yours!  Can you add to it?
		elseif ($user_info['id'] == $id_member_poster && !allowedTo('poll_add_any'))
			isAllowedTo('poll_add_own');
		// If you're not the owner, can you add to any poll?
		else
			isAllowedTo('poll_add_any');

		require_once($sourcedir . '/Subs-Members.php');
		$allowedVoteGroups = groupsAllowedTo('poll_vote', $board);

		// Set up the poll options.
		$context['poll_options'] = array(
			'max_votes' => empty($_POST['poll_max_votes']) ? '1' : max(1, $_POST['poll_max_votes']),
			'hide' => empty($_POST['poll_hide']) ? 0 : $_POST['poll_hide'],
			'expire' => !isset($_POST['poll_expire']) ? '' : $_POST['poll_expire'],
			'change_vote' => isset($_POST['poll_change_vote']),
			'guest_vote' => isset($_POST['poll_guest_vote']),
			'guest_vote_enabled' => in_array(-1, $allowedVoteGroups['allowed']),
		);

		// Make all five poll choices empty.
		$context['choices'] = array(
			array('id' => 0, 'number' => 1, 'label' => '', 'is_last' => false),
			array('id' => 1, 'number' => 2, 'label' => '', 'is_last' => false),
			array('id' => 2, 'number' => 3, 'label' => '', 'is_last' => false),
			array('id' => 3, 'number' => 4, 'label' => '', 'is_last' => false),
			array('id' => 4, 'number' => 5, 'label' => '', 'is_last' => true)
		);
		$context['last_choice_id'] = 4;
	}

	if ($context['make_event'])
	{
		// They might want to pick a board.
		if (!isset($context['current_board']))
			$context['current_board'] = 0;

		// Start loading up the event info.
		$context['event'] = array();
		$context['event']['title'] = isset($_REQUEST['evtitle']) ? htmlspecialchars(stripslashes($_REQUEST['evtitle'])) : '';

		$context['event']['id'] = isset($_REQUEST['eventid']) ? (int) $_REQUEST['eventid'] : -1;
		$context['event']['new'] = $context['event']['id'] == -1;

		// Permissions check!
		isAllowedTo('calendar_post');

		// Editing an event?  (but NOT previewing!?)
		if (empty($context['event']['new']) && !isset($_REQUEST['subject']))
		{
			// If the user doesn't have permission to edit the post in this topic, redirect them.
			if ((empty($id_member_poster) || $id_member_poster != $user_info['id'] || !allowedTo('modify_own')) && !allowedTo('modify_any'))
			{
				require_once($sourcedir . '/Calendar.php');
				return CalendarPost();
			}

			// Get the current event information.
			$request = $smcFunc['db_query']('', '
				SELECT
					id_member, title, MONTH(start_date) AS month, DAYOFMONTH(start_date) AS day,
					YEAR(start_date) AS year, (TO_DAYS(end_date) - TO_DAYS(start_date)) AS span
				FROM {db_prefix}calendar
				WHERE id_event = {int:id_event}
				LIMIT 1',
				array(
					'id_event' => $context['event']['id'],
				)
			);
			$row = $smcFunc['db_fetch_assoc']($request);
			$smcFunc['db_free_result']($request);

			// Make sure the user is allowed to edit this event.
			if ($row['id_member'] != $user_info['id'])
				isAllowedTo('calendar_edit_any');
			elseif (!allowedTo('calendar_edit_any'))
				isAllowedTo('calendar_edit_own');

			$context['event']['month'] = $row['month'];
			$context['event']['day'] = $row['day'];
			$context['event']['year'] = $row['year'];
			$context['event']['title'] = $row['title'];
			$context['event']['span'] = $row['span'] + 1;
		}
		else
		{
			$today = getdate();

			// You must have a month and year specified!
			if (!isset($_REQUEST['month']))
				$_REQUEST['month'] = $today['mon'];
			if (!isset($_REQUEST['year']))
				$_REQUEST['year'] = $today['year'];

			$context['event']['month'] = (int) $_REQUEST['month'];
			$context['event']['year'] = (int) $_REQUEST['year'];
			$context['event']['day'] = isset($_REQUEST['day']) ? $_REQUEST['day'] : ($_REQUEST['month'] == $today['mon'] ? $today['mday'] : 0);
			$context['event']['span'] = isset($_REQUEST['span']) ? $_REQUEST['span'] : 1;

			// Make sure the year and month are in the valid range.
			if ($context['event']['month'] < 1 || $context['event']['month'] > 12)
				fatal_lang_error('invalid_month', false);
			if ($context['event']['year'] < $modSettings['cal_minyear'] || $context['event']['year'] > $modSettings['cal_maxyear'])
				fatal_lang_error('invalid_year', false);

			// Get a list of boards they can post in.
			$boards = boardsAllowedTo('post_new');
			if (empty($boards))
				fatal_lang_error('cannot_post_new', 'user');

			// Load a list of boards for this event in the context.
			require_once($sourcedir . '/Subs-MessageIndex.php');
			$boardListOptions = array(
				'included_boards' => in_array(0, $boards) ? null : $boards,
				'not_redirection' => true,
				'use_permissions' => true,
				'selected_board' => empty($context['current_board']) ? $modSettings['cal_defaultboard'] : $context['current_board'],
			);
			$context['event']['categories'] = getBoardList($boardListOptions);
		}

		// Find the last day of the month.
		$context['event']['last_day'] = (int) strftime('%d', mktime(0, 0, 0, $context['event']['month'] == 12 ? 1 : $context['event']['month'] + 1, 0, $context['event']['month'] == 12 ? $context['event']['year'] + 1 : $context['event']['year']));

		$context['event']['board'] = !empty($board) ? $board : $modSettings['cal_defaultboard'];
	}

	// See if any new replies have come along.
	// Huh, $_REQUEST['msg'] is set upon submit, so this doesn't get executed at submit
	// only at preview
	if (empty($_REQUEST['msg']) && !empty($topic))
	{
		if (empty($options['no_new_reply_warning']) && isset($_REQUEST['last_msg']) && $context['topic_last_message'] > $_REQUEST['last_msg'])
		{
			$request = $smcFunc['db_query']('', '
				SELECT COUNT(*)
				FROM {db_prefix}messages
				WHERE id_topic = {int:current_topic}
					AND id_msg > {int:last_msg}' . (!$modSettings['postmod_active'] || allowedTo('approve_posts') ? '' : '
					AND approved = {int:approved}') . '
				LIMIT 1',
				array(
					'current_topic' => $topic,
					'last_msg' => (int) $_REQUEST['last_msg'],
					'approved' => 1,
				)
			);
			list ($context['new_replies']) = $smcFunc['db_fetch_row']($request);
			$smcFunc['db_free_result']($request);

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

				$post_errors[] = 'new_replies';

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

	// Get a response prefix (like 'Re:') in the default forum language.
	if (!isset($context['response_prefix']) && !($context['response_prefix'] = cache_get_data('response_prefix')))
	{
		if ($language === $user_info['language'])
			$context['response_prefix'] = $txt['response_prefix'];
		else
		{
			loadLanguage('index', $language, false);
			$context['response_prefix'] = $txt['response_prefix'];
			loadLanguage('index');
		}
		cache_put_data('response_prefix', $context['response_prefix'], 600);
	}

	// Previewing, modifying, or posting?
	// Do we have a body, but an error happened.
	if (isset($_REQUEST['message']) || !empty($context['post_error']))
	{
		// Validate inputs.
		if (empty($context['post_error']))
		{
			// This means they didn't click Post and get an error.
			$really_previewing = true;
		}
		else
		{
			if (!isset($_REQUEST['subject']))
				$_REQUEST['subject'] = '';
			if (!isset($_REQUEST['message']))
				$_REQUEST['message'] = '';
			if (!isset($_REQUEST['icon']))
				$_REQUEST['icon'] = 'xx';

			// They are previewing if they asked to preview (i.e. came from quick reply).
			$really_previewing = !empty($_POST['preview']);
		}

		// 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'];

		// Set up the inputs for the form.
		$form_subject = strtr($smcFunc['htmlspecialchars']($_REQUEST['subject']), array("\r" => '', "\n" => '', "\t" => ''));
		$form_message = $smcFunc['htmlspecialchars']($_REQUEST['message'], ENT_QUOTES);

		// Make sure the subject isn't too long - taking into account special characters.
		if ($smcFunc['strlen']($form_subject) > 100)
			$form_subject = $smcFunc['substr']($form_subject, 0, 100);

		if (isset($_REQUEST['poll']))
		{
			$context['question'] = isset($_REQUEST['question']) ? $smcFunc['htmlspecialchars'](trim($_REQUEST['question'])) : '';

			$context['choices'] = array();
			$choice_id = 0;

			$_POST['options'] = empty($_POST['options']) ? array() : htmlspecialchars__recursive($_POST['options']);
			foreach ($_POST['options'] as $option)
			{
				if (trim($option) == '')
					continue;

				$context['choices'][] = array(
					'id' => $choice_id++,
					'number' => $choice_id,
					'label' => $option,
					'is_last' => false
				);
			}

			// One empty option for those with js disabled...I know are few... :P
			$context['choices'][] = array(
				'id' => $choice_id++,
				'number' => $choice_id,
				'label' => '',
				'is_last' => false
			);

			if (count($context['choices']) < 2)
			{
				$context['choices'][] = array(
					'id' => $choice_id++,
					'number' => $choice_id,
					'label' => '',
					'is_last' => false
				);
			}
			$context['last_choice_id'] = $choice_id;
			$context['choices'][count($context['choices']) - 1]['is_last'] = true;
		}

		// Are you... a guest?
		if ($user_info['is_guest'])
		{
			$_REQUEST['guestname'] = !isset($_REQUEST['guestname']) ? '' : trim($_REQUEST['guestname']);
			$_REQUEST['email'] = !isset($_REQUEST['email']) ? '' : trim($_REQUEST['email']);

			$_REQUEST['guestname'] = htmlspecialchars($_REQUEST['guestname']);
			$context['name'] = $_REQUEST['guestname'];
			$_REQUEST['email'] = htmlspecialchars($_REQUEST['email']);
			$context['email'] = $_REQUEST['email'];

			$user_info['name'] = $_REQUEST['guestname'];
		}

		// Only show the preview stuff if they hit Preview.
		if (($really_previewing == true || isset($_REQUEST['xml'])) && !isset($_POST['id_draft']))
		{
			// Set up the preview message and subject and censor them...
			$context['preview_message'] = $form_message;
			preparsecode($form_message, true);
			preparsecode($context['preview_message']);

			// Do all bulletin board code tags, with or without smileys.
			$context['preview_message'] = parse_bbc($context['preview_message'], isset($_REQUEST['ns']) ? 0 : 1);
			censorText($context['preview_message']);

			if ($form_subject != '')
			{
				$context['preview_subject'] = $form_subject;

				censorText($context['preview_subject']);
			}
			else
				$context['preview_subject'] = '<em>' . $txt['no_subject'] . '</em>';

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

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

		$context['icon'] = isset($_REQUEST['icon']) ? preg_replace('~[\./\\\\*\':"<>]~', '', $_REQUEST['icon']) : 'xx';

		// Set the destination action for submission.
		$context['destination'] = 'post2;start=' . $_REQUEST['start'] . (isset($_REQUEST['msg']) ? ';msg=' . $_REQUEST['msg'] . ';' . $context['session_var'] . '=' . $context['session_id'] : '') . (isset($_REQUEST['poll']) ? ';poll' : '');
		$context['submit_label'] = isset($_REQUEST['msg']) ? $txt['save'] : $txt['post'];

		// Previewing an edit?
		if (isset($_REQUEST['msg']) && !empty($topic))
		{
			// Get the existing message.
			$request = $smcFunc['db_query']('', '
				SELECT
					m.id_member, m.modified_time, m.smileys_enabled, m.body,
					m.poster_name, m.poster_email, m.subject, m.icon, m.approved,
					IFNULL(a.size, -1) AS filesize, a.filename, a.id_attach,
					a.approved AS attachment_approved, t.id_member_started AS id_member_poster,
					m.poster_time, log.id_action
				FROM {db_prefix}messages AS m
					INNER JOIN {db_prefix}topics AS t ON (t.id_topic = {int:current_topic})
					LEFT JOIN {db_prefix}attachments AS a ON (a.id_msg = m.id_msg AND a.attachment_type = {int:attachment_type})
					LEFT JOIN {db_prefix}log_actions AS log ON (m.id_topic = log.id_topic AND log.action = {string:announce_action})
				WHERE m.id_msg = {int:id_msg}
					AND m.id_topic = {int:current_topic}',
				array(
					'current_topic' => $topic,
					'attachment_type' => 0,
					'id_msg' => $_REQUEST['msg'],
					'announce_action' => 'announce_topic',
				)
			);
			// The message they were trying to edit was most likely deleted.
			// @todo Change this error message?
			if ($smcFunc['db_num_rows']($request) == 0)
				fatal_lang_error('no_board', false);
			$row = $smcFunc['db_fetch_assoc']($request);

			$attachment_stuff = array($row);
			while ($row2 = $smcFunc['db_fetch_assoc']($request))
				$attachment_stuff[] = $row2;
			$smcFunc['db_free_result']($request);

			if ($row['id_member'] == $user_info['id'] && !allowedTo('modify_any'))
			{
				// Give an extra five minutes over the disable time threshold, so they can type - assuming the post is public.
				if ($row['approved'] && !empty($modSettings['edit_disable_time']) && $row['poster_time'] + ($modSettings['edit_disable_time'] + 5) * 60 < time())
					fatal_lang_error('modify_post_time_passed', false);
				elseif ($row['id_member_poster'] == $user_info['id'] && !allowedTo('modify_own'))
					isAllowedTo('modify_replies');
				else
					isAllowedTo('modify_own');
			}
			elseif ($row['id_member_poster'] == $user_info['id'] && !allowedTo('modify_any'))
				isAllowedTo('modify_replies');
			else
				isAllowedTo('modify_any');

			if (!empty($modSettings['attachmentEnable']))
			{
				$request = $smcFunc['db_query']('', '
					SELECT IFNULL(size, -1) AS filesize, filename, id_attach, approved
					FROM {db_prefix}attachments
					WHERE id_msg = {int:id_msg}
						AND attachment_type = {int:attachment_type}
					ORDER BY id_attach',
					array(
						'id_msg' => (int) $_REQUEST['msg'],
						'attachment_type' => 0,
					)
				);

				while ($row = $smcFunc['db_fetch_assoc']($request))
				{
					if ($row['filesize'] <= 0)
						continue;
					$context['current_attachments'][] = array(
						'name' => htmlspecialchars($row['filename']),
						'size' => $row['filesize'],
						'id' => $row['id_attach'],
						'approved' => $row['approved'],
					);
				}
				$smcFunc['db_free_result']($request);
			}

			if ($context['can_announce'] && !empty($row['id_action']))
			{
				loadLanguage('Errors');
				$context['post_error']['messages'][] = $txt['error_topic_already_announced'];
			}

			// Allow moderators to change names....
			if (allowedTo('moderate_forum') && !empty($topic))
			{
				$request = $smcFunc['db_query']('', '
					SELECT id_member, poster_name, poster_email
					FROM {db_prefix}messages
					WHERE id_msg = {int:id_msg}
						AND id_topic = {int:current_topic}
					LIMIT 1',
					array(
						'current_topic' => $topic,
						'id_msg' => (int) $_REQUEST['msg'],
					)
				);
				$row = $smcFunc['db_fetch_assoc']($request);
				$smcFunc['db_free_result']($request);

				if (empty($row['id_member']))
				{
					$context['name'] = htmlspecialchars($row['poster_name']);
					$context['email'] = htmlspecialchars($row['poster_email']);
				}
			}
		}

		// No check is needed, since nothing is really posted.
		checkSubmitOnce('free');
	}
	// Editing a message...
	elseif (isset($_REQUEST['msg']) && !empty($topic))
	{
		$_REQUEST['msg'] = (int) $_REQUEST['msg'];

		// Get the existing message.
		$request = $smcFunc['db_query']('', '
			SELECT
				m.id_member, m.modified_time, m.modified_name, m.smileys_enabled, m.body,
				m.poster_name, m.poster_email, m.subject, m.icon, m.approved,
				IFNULL(a.size, -1) AS filesize, a.filename, a.id_attach,
				a.approved AS attachment_approved, t.id_member_started AS id_member_poster,
				m.poster_time, log.id_action
			FROM {db_prefix}messages AS m
				INNER JOIN {db_prefix}topics AS t ON (t.id_topic = {int:current_topic})
				LEFT JOIN {db_prefix}attachments AS a ON (a.id_msg = m.id_msg AND a.attachment_type = {int:attachment_type})
					LEFT JOIN {db_prefix}log_actions AS log ON (m.id_topic = log.id_topic AND log.action = {string:announce_action})
			WHERE m.id_msg = {int:id_msg}
				AND m.id_topic = {int:current_topic}',
			array(
				'current_topic' => $topic,
				'attachment_type' => 0,
				'id_msg' => $_REQUEST['msg'],
				'announce_action' => 'announce_topic',
			)
		);
		// The message they were trying to edit was most likely deleted.
		if ($smcFunc['db_num_rows']($request) == 0)
			fatal_lang_error('no_message', false);
		$row = $smcFunc['db_fetch_assoc']($request);

		$attachment_stuff = array($row);
		while ($row2 = $smcFunc['db_fetch_assoc']($request))
			$attachment_stuff[] = $row2;
		$smcFunc['db_free_result']($request);

		if ($row['id_member'] == $user_info['id'] && !allowedTo('modify_any'))
		{
			// Give an extra five minutes over the disable time threshold, so they can type - assuming the post is public.
			if ($row['approved'] && !empty($modSettings['edit_disable_time']) && $row['poster_time'] + ($modSettings['edit_disable_time'] + 5) * 60 < time())
				fatal_lang_error('modify_post_time_passed', false);
			elseif ($row['id_member_poster'] == $user_info['id'] && !allowedTo('modify_own'))
				isAllowedTo('modify_replies');
			else
				isAllowedTo('modify_own');
		}
		elseif ($row['id_member_poster'] == $user_info['id'] && !allowedTo('modify_any'))
			isAllowedTo('modify_replies');
		else
			isAllowedTo('modify_any');

		if ($context['can_announce'] && !empty($row['id_action']))
		{
			loadLanguage('Errors');
			$context['post_error']['messages'][] = $txt['error_topic_already_announced'];
		}

		// When was it last modified?
		if (!empty($row['modified_time']))
		{
			$context['last_modified'] = timeformat($row['modified_time']);
			$context['last_modified_text'] = sprintf($txt['last_edit_by'], $context['last_modified'], $row['modified_name']);
		}

		// Get the stuff ready for the form.
		$form_subject = $row['subject'];
		$form_message = un_preparsecode($row['body']);
		censorText($form_message);
		censorText($form_subject);

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

		// Show an "approve" box if the user can approve it, and the message isn't approved.
		if (!$row['approved'] && !$context['show_approval'])
			$context['show_approval'] = allowedTo('approve_posts');

		// Sort the attachments so they are in the order saved
		$temp = array();
		foreach ($attachment_stuff as $attachment)
		{
			if ($attachment['filesize'] >= 0 && !empty($modSettings['attachmentEnable']))
				$temp[$attachment['id_attach']] = $attachment;

		}
		ksort($temp);

		// Load up 'em attachments!
		foreach ($temp as $attachment)
		{
			$context['current_attachments'][] = array(
				'name' => htmlspecialchars($attachment['filename']),
				'size' => $attachment['filesize'],
				'id' => $attachment['id_attach'],
				'approved' => $attachment['attachment_approved'],
			);
		}

		// Allow moderators to change names....
		if (allowedTo('moderate_forum') && empty($row['id_member']))
		{
			$context['name'] = htmlspecialchars($row['poster_name']);
			$context['email'] = htmlspecialchars($row['poster_email']);
		}

		// Set the destinaton.
		$context['destination'] = 'post2;start=' . $_REQUEST['start'] . ';msg=' . $_REQUEST['msg'] . ';' . $context['session_var'] . '=' . $context['session_id'] . (isset($_REQUEST['poll']) ? ';poll' : '');
		$context['submit_label'] = $txt['save'];
	}
	// Posting...
	else
	{
		// By default....
		$context['use_smileys'] = true;
		$context['icon'] = 'xx';

		if ($user_info['is_guest'])
		{
			$context['name'] = isset($_SESSION['guest_name']) ? $_SESSION['guest_name'] : '';
			$context['email'] = isset($_SESSION['guest_email']) ? $_SESSION['guest_email'] : '';
		}
		$context['destination'] = 'post2;start=' . $_REQUEST['start'] . (isset($_REQUEST['poll']) ? ';poll' : '');

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

		// Posting a quoted reply?
		if (!empty($topic) && !empty($_REQUEST['quote']))
		{
			// Make sure they _can_ quote this post, and if so get it.
			$request = $smcFunc['db_query']('', '
				SELECT m.subject, IFNULL(mem.real_name, m.poster_name) AS poster_name, m.poster_time, m.body
				FROM {db_prefix}messages AS m
					INNER JOIN {db_prefix}boards AS b ON (b.id_board = m.id_board AND {query_see_board})
					LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = m.id_member)
				WHERE m.id_msg = {int:id_msg}' . (!$modSettings['postmod_active'] || allowedTo('approve_posts') ? '' : '
					AND m.approved = {int:is_approved}') . '
				LIMIT 1',
				array(
					'id_msg' => (int) $_REQUEST['quote'],
					'is_approved' => 1,
				)
			);
			if ($smcFunc['db_num_rows']($request) == 0)
				fatal_lang_error('quoted_post_deleted', false);
			list ($form_subject, $mname, $mdate, $form_message) = $smcFunc['db_fetch_row']($request);
			$smcFunc['db_free_result']($request);

			// Add 'Re: ' to the front of the quoted subject.
			if (trim($context['response_prefix']) != '' && $smcFunc['strpos']($form_subject, trim($context['response_prefix'])) !== 0)
				$form_subject = $context['response_prefix'] . $form_subject;

			// Censor the message and subject.
			censorText($form_message);
			censorText($form_subject);

			// But if it's in HTML world, turn them into htmlspecialchar's so they can be edited!
			if (strpos($form_message, '[html]') !== false)
			{
				$parts = preg_split('~(\[/code\]|\[code(?:=[^\]]+)?\])~i', $form_message, -1, PREG_SPLIT_DELIM_CAPTURE);
				for ($i = 0, $n = count($parts); $i < $n; $i++)
				{
					// It goes 0 = outside, 1 = begin tag, 2 = inside, 3 = close tag, repeat.
					if ($i % 4 == 0)
						$parts[$i] = preg_replace('~\[html\](.+?)\[/html\]~ise', '\'[html]\' . preg_replace(\'~<br\s?/?' . '>~i\', \'&lt;br /&gt;<br />\', \'$1\') . \'[/html]\'', $parts[$i]);
				}
				$form_message = implode('', $parts);
			}

			$form_message = preg_replace('~<br ?/?' . '>~i', "\n", $form_message);

			// Remove any nested quotes, if necessary.
			if (!empty($modSettings['removeNestedQuotes']))
				$form_message = preg_replace(array('~\n?\[quote.*?\].+?\[/quote\]\n?~is', '~^\n~', '~\[/quote\]~'), '', $form_message);

			// Add a quote string on the front and end.
			$form_message = '[quote author=' . $mname . ' link=topic=' . $topic . '.msg' . (int) $_REQUEST['quote'] . '#msg' . (int) $_REQUEST['quote'] . ' date=' . $mdate . ']' . "\n" . rtrim($form_message) . "\n" . '[/quote]';
		}
		// Posting a reply without a quote?
		elseif (!empty($topic) && empty($_REQUEST['quote']))
		{
			// Get the first message's subject.
			$form_subject = $first_subject;

			// Add 'Re: ' to the front of the subject.
			if (trim($context['response_prefix']) != '' && $form_subject != '' && $smcFunc['strpos']($form_subject, trim($context['response_prefix'])) !== 0)
				$form_subject = $context['response_prefix'] . $form_subject;

			// Censor the subject.
			censorText($form_subject);

			$form_message = '';
		}
		else
		{
			$form_subject = isset($_GET['subject']) ? $_GET['subject'] : '';
			$form_message = '';
		}
	}

	$context['can_post_attachment'] = !empty($modSettings['attachmentEnable']) && $modSettings['attachmentEnable'] == 1 && (allowedTo('post_attachment') || ($modSettings['postmod_active'] && allowedTo('post_unapproved_attachments')));
	if ($context['can_post_attachment'])
	{
		// If there are attachments, calculate the total size and how many.
		$context['attachments']['total_size'] = 0;
		$context['attachments']['quantity'] = 0;

		// If this isn't a new post, check the current attachments.
		if (isset($_REQUEST['msg']))
		{
			$context['attachments']['quantity'] = count($context['current_attachments']);
			foreach ($context['current_attachments'] as $attachment)
				$context['attachments']['total_size'] += $attachment['size'];
		}

		// A bit of house keeping first.
		if (!empty($_SESSION['temp_attachments']) && count($_SESSION['temp_attachments']) == 1)
			unset($_SESSION['temp_attachments']);

		if (!empty($_SESSION['temp_attachments']))
		{
			// Is this a request to delete them?
			if (isset($_GET['delete_temp']))
			{
				foreach ($_SESSION['temp_attachments'] as $attachID => $attachment)
				{
					if (strpos($attachID, 'post_tmp_' . $user_info['id']) !== false)
						if (file_exists($attachment['tmp_name']))
							unlink($attachment['tmp_name']);
				}
				$post_errors[] = 'temp_attachments_gone';
				$_SESSION['temp_attachments'] = array();
			}
			// Hmm, coming in fresh and there are files in session.
			elseif ($context['current_action'] != 'post2' || !empty($_POST['from_qr']))
			{
				// Let's be nice and see if they belong here first.
				if ((empty($_REQUEST['msg']) && empty($_SESSION['temp_attachments']['post']['msg']) && $_SESSION['temp_attachments']['post']['board'] == $board) || (!empty($_REQUEST['msg']) && $_SESSION['temp_attachments']['post']['msg'] == $_REQUEST['msg']))
				{
					// See if any files still exist before showing the warning message and the files attached.
					foreach ($_SESSION['temp_attachments'] as $attachID => $attachment)
					{
						if (strpos($attachID, 'post_tmp_' . $user_info['id']) === false)
							continue;

						if (file_exists($attachment['tmp_name']))
						{
							$post_errors[] = 'temp_attachments_new';
							$context['files_in_session_warning'] = $txt['attached_files_in_session'];
							unset($_SESSION['temp_attachments']['post']['files']);
							break;
						}
					}
				}
				else
				{
					// Since, they don't belong here. Let's inform the user that they exist..
					if (!empty($topic))
						$delete_link = '<a href="' . $scripturl . '?action=post' .(!empty($_REQUEST['msg']) ? (';msg=' . $_REQUEST['msg']) : '') . (!empty($_REQUEST['last_msg']) ? (';last_msg=' . $_REQUEST['last_msg']) : '') . ';topic=' . $topic . ';delete_temp">' . $txt['here'] . '</a>';
					else
						$delete_link = '<a href="' . $scripturl . '?action=post;board=' . $board . ';delete_temp">' . $txt['here'] . '</a>';

					// Compile a list of the files to show the user.
					$file_list = array();
					foreach ($_SESSION['temp_attachments'] as $attachID => $attachment)
						if (strpos($attachID, 'post_tmp_' . $user_info['id']) !== false)
							$file_list[] =  $attachment['name'];

					$_SESSION['temp_attachments']['post']['files'] = $file_list;
					$file_list = '<div class="attachments">' . implode('<br />', $file_list) . '</div>';

					if (!empty($_SESSION['temp_attachments']['post']['msg']))
					{
						// We have a message id, so we can link back to the old topic they were trying to edit..
						$goback_link = '<a href="' . $scripturl . '?action=post' .(!empty($_SESSION['temp_attachments']['post']['msg']) ? (';msg=' . $_SESSION['temp_attachments']['post']['msg']) : '') . (!empty($_SESSION['temp_attachments']['post']['last_msg']) ? (';last_msg=' . $_SESSION['temp_attachments']['post']['last_msg']) : '') . ';topic=' . $_SESSION['temp_attachments']['post']['topic'] . ';additionalOptions">' . $txt['here'] . '</a>';

						$post_errors[] = array('temp_attachments_found', array($delete_link, $goback_link, $file_list));
						$context['ignore_temp_attachments'] = true;
					}
					else
					{
						$post_errors[] = array('temp_attachments_lost', array($delete_link, $file_list));
						$context['ignore_temp_attachments'] = true;
					}
				}
			}

			if (!empty($context['we_are_history']))
				$post_errors[] = $context['we_are_history'];

			foreach ($_SESSION['temp_attachments'] as $attachID => $attachment)
			{
				if (isset($context['ignore_temp_attachments']) || isset($_SESSION['temp_attachments']['post']['files']))
					break;

				if ($attachID != 'initial_error' && strpos($attachID, 'post_tmp_' . $user_info['id']) === false)
					continue;

				if ($attachID == 'initial_error')
				{
					$txt['error_attach_initial_error'] = $txt['attach_no_upload'] . '<div style="padding: 0 1em;">' . (is_array($attachment) ? vsprintf($txt[$attachment[0]], $attachment[1]) : $txt[$attachment]) . '</div>';
					$post_errors[] = 'attach_initial_error';
					unset($_SESSION['temp_attachments']);
					break;
				}

				// Show any errors which might of occured.
				if (!empty($attachment['errors']))
				{
					$txt['error_attach_errors'] = empty($txt['error_attach_errors']) ? '<br />' : '';
					$txt['error_attach_errors'] .= vsprintf($txt['attach_warning'], $attachment['name']) . '<div style="padding: 0 1em;">';
					foreach ($attachment['errors'] as $error)
						$txt['error_attach_errors'] .= (is_array($error) ? vsprintf($txt[$error[0]], $error[1]) : $txt[$error]) . '<br  />';
					$txt['error_attach_errors'] .= '</div>';
					$post_errors[] = 'attach_errors';

					// Take out the trash.
					unset($_SESSION['temp_attachments'][$attachID]);
					if (file_exists($attachment['tmp_name']))
						unlink($attachment['tmp_name']);
					continue;
				}

				// More house keeping.
				if (!file_exists($attachment['tmp_name']))
				{
					unset($_SESSION['temp_attachments'][$attachID]);
					continue;
				}

				$context['attachments']['quantity']++;
				$context['attachments']['total_size'] += $attachment['size'];
				if (!isset($context['files_in_session_warning']))
					$context['files_in_session_warning'] = $txt['attached_files_in_session'];

				$context['current_attachments'][] = array(
					'name' => '<u>' . htmlspecialchars($attachment['name']) . '</u>',
					'size' => $attachment['size'],
					'id' => $attachID,
					'unchecked' => false,
					'approved' => 1,
				);
			}
		}
	}

	// Do we need to show the visual verification image?
	$context['require_verification'] = !$user_info['is_mod'] && !$user_info['is_admin'] && !empty($modSettings['posts_require_captcha']) && ($user_info['posts'] < $modSettings['posts_require_captcha'] || ($user_info['is_guest'] && $modSettings['posts_require_captcha'] == -1));
	if ($context['require_verification'])
	{
		require_once($sourcedir . '/Subs-Editor.php');
		$verificationOptions = array(
			'id' => 'post',
		);
		$context['require_verification'] = create_control_verification($verificationOptions);
		$context['visual_verification_id'] = $verificationOptions['id'];
	}

	// If they came from quick reply, and have to enter verification details, give them some notice.
	if (!empty($_REQUEST['from_qr']) && !empty($context['require_verification']))
		$post_errors[] = 'need_qr_verification';

	/*
	 * There are two error types: serious and miinor. Serious errors
	 * actually tell the user that a real error has occurred, while minor
	 * errors are like warnings that let them know that something with
	 * their post isn't right.
	 */
	$minor_errors = array('not_approved', 'new_replies', 'old_topic', 'need_qr_verification', 'no_subject');

	call_integration_hook('integrate_post_errors', array($post_errors, $minor_errors));

	// Any errors occurred?
	if (!empty($post_errors))
	{
		loadLanguage('Errors');
		$context['error_type'] = 'minor';
		foreach ($post_errors as $post_error)
			if (is_array($post_error))
			{
				$post_error_id = $post_error[0];
				$context['post_error'][$post_error_id] = vsprintf($txt['error_' . $post_error_id], $post_error[1]);

				// If it's not a minor error flag it as such.
				if (!in_array($post_error_id, $minor_errors))
					$context['error_type'] = 'serious';
			}
			else
			{
				$context['post_error'][$post_error] = $txt['error_' . $post_error];

				// If it's not a minor error flag it as such.
				if (!in_array($post_error, $minor_errors))
					$context['error_type'] = 'serious';
			}
	}

	// What are you doing? Posting a poll, modifying, previewing, new post, or reply...
	if (isset($_REQUEST['poll']))
		$context['page_title'] = $txt['new_poll'];
	elseif ($context['make_event'])
		$context['page_title'] = $context['event']['id'] == -1 ? $txt['calendar_post_event'] : $txt['calendar_edit'];
	elseif (isset($_REQUEST['msg']))
		$context['page_title'] = $txt['modify_msg'];
	elseif (isset($_REQUEST['subject'], $context['preview_subject']))
		$context['page_title'] = $txt['preview'] . ' - ' . strip_tags($context['preview_subject']);
	elseif (empty($topic))
		$context['page_title'] = $txt['start_new_topic'];
	else
		$context['page_title'] = $txt['post_reply'];

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

	// Give wireless a linktree url to the post screen, so that they can switch to full version.
	if (WIRELESS)
		$context['linktree'][count($context['linktree']) - 1]['url'] = $scripturl . '?action=post;' . (!empty($topic) ? 'topic=' . $topic : 'board=' . $board) . '.' . $_REQUEST['start'] . (isset($_REQUEST['msg']) ? ';msg=' . (int) $_REQUEST['msg'] . ';' . $context['session_var'] . '=' . $context['session_id'] : '');

	$context['subject'] = addcslashes($form_subject, '"');
	$context['message'] = str_replace(array('"', '<', '>', '&nbsp;'), array('&quot;', '&lt;', '&gt;', ' '), $form_message);

	// Are post drafts enabled?
	$context['drafts_save'] = !empty($modSettings['drafts_enabled']) && !empty($modSettings['drafts_post_enabled']) && allowedTo('post_draft');
	$context['drafts_autosave'] = !empty($context['drafts_save']) && !empty($modSettings['drafts_autosave_enabled']) && allowedTo('post_autosave_draft');

	// Build a list of drafts that they can load in to the editor
	if (!empty($context['drafts_save']))
	{
		require_once($sourcedir . '/Drafts.php');
		ShowDrafts($user_info['id'], $topic);
	}

	// Needed for the editor and message icons.
	require_once($sourcedir . '/Subs-Editor.php');

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

	// Store the ID.
	$context['post_box_name'] = $editorOptions['id'];

	$context['attached'] = '';
	$context['make_poll'] = isset($_REQUEST['poll']);

	// Message icons - customized icons are off?
	$context['icons'] = getMessageIcons($board);

	if (!empty($context['icons']))
		$context['icons'][count($context['icons']) - 1]['is_last'] = true;

	// Are we starting a poll? if set the poll icon as selected if its available
	if (isset($_REQUEST['poll']))
	{
	    foreach ($context['icons'] as $icons)
		{
			if (isset($icons['value']) && $icons['value'] == 'poll')
			{
				// if found we are done
				$context['icon'] = 'poll';
				break;
			}
		}
	}

	$context['icon_url'] = '';
	for ($i = 0, $n = count($context['icons']); $i < $n; $i++)
	{
		$context['icons'][$i]['selected'] = $context['icon'] == $context['icons'][$i]['value'];
		if ($context['icons'][$i]['selected'])
			$context['icon_url'] = $context['icons'][$i]['url'];
	}
	if (empty($context['icon_url']))
	{
		$context['icon_url'] = $settings[file_exists($settings['theme_dir'] . '/images/post/' . $context['icon'] . '.png') ? 'images_url' : 'default_images_url'] . '/post/' . $context['icon'] . '.png';
		array_unshift($context['icons'], array(
			'value' => $context['icon'],
			'name' => $txt['current_icon'],
			'url' => $context['icon_url'],
			'is_last' => empty($context['icons']),
			'selected' => true,
		));
	}

	if (!empty($topic) && !empty($modSettings['topicSummaryPosts']))
		getTopic();

	// If the user can post attachments prepare the warning labels.
	if ($context['can_post_attachment'])
	{
		// If they've unchecked an attachment, they may still want to attach that many more files, but don't allow more than num_allowed_attachments.
		$context['num_allowed_attachments'] = empty($modSettings['attachmentNumPerPostLimit']) ? 50 : min($modSettings['attachmentNumPerPostLimit'] - count($context['current_attachments']), $modSettings['attachmentNumPerPostLimit']);
		$context['can_post_attachment_unapproved'] = allowedTo('post_attachment');
		$context['attachment_restrictions'] = array();
		$context['allowed_extensions'] = strtr(strtolower($modSettings['attachmentExtensions']), array(',' => ', '));
		$attachmentRestrictionTypes = array('attachmentNumPerPostLimit', 'attachmentPostLimit', 'attachmentSizeLimit');
		foreach ($attachmentRestrictionTypes as $type)
			if (!empty($modSettings[$type]))
			{
				$context['attachment_restrictions'][] = sprintf($txt['attach_restrict_' . $type], comma_format($modSettings[$type], 0));
				// Show some numbers. If they exist.
				if ($type == 'attachmentNumPerPostLimit' && $context['attachments']['quantity'] > 0)
					$context['attachment_restrictions'][] = sprintf($txt['attach_remaining'], $modSettings['attachmentNumPerPostLimit'] - $context['attachments']['quantity']);
				elseif ($type == 'attachmentPostLimit' && $context['attachments']['total_size'] > 0)
					$context['attachment_restrictions'][] = sprintf($txt['attach_available'], comma_format(round(max($modSettings['attachmentPostLimit'] - ($context['attachments']['total_size'] / 1028), 0)), 0));
			}
	}

	$context['back_to_topic'] = isset($_REQUEST['goback']) || (isset($_REQUEST['msg']) && !isset($_REQUEST['subject']));
	$context['show_additional_options'] = !empty($_POST['additional_options']) || isset($_SESSION['temp_attachments']['post']) || isset($_GET['additionalOptions']);

	$context['is_new_topic'] = empty($topic);
	$context['is_new_post'] = !isset($_REQUEST['msg']);
	$context['is_first_post'] = $context['is_new_topic'] || (isset($_REQUEST['msg']) && $_REQUEST['msg'] == $id_first_msg);

	// WYSIWYG only works if BBC is enabled
	$modSettings['disable_wysiwyg'] = !empty($modSettings['disable_wysiwyg']) || empty($modSettings['enableBBC']);

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

	// Finally, load the template.
	if (WIRELESS && WIRELESS_PROTOCOL != 'wap')
		$context['sub_template'] = WIRELESS_PROTOCOL . '_post';
	elseif (!isset($_REQUEST['xml']))
		loadTemplate('Post');
}

/**
 * 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.
 */
function Post2()
{
	global $board, $topic, $txt, $modSettings, $sourcedir, $context;
	global $user_info, $board_info, $options, $smcFunc;

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

	// No need!
	$context['robot_no_index'] = true;

	// Previewing? Go back to start.
	if (isset($_REQUEST['preview']))
		return Post();

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

	// No errors as yet.
	$post_errors = array();

	// If the session has timed out, let the user re-submit their form.
	if (checkSession('post', '', false) != '')
		$post_errors[] = 'session_timeout';

	// Wrong verification code?
	if (!$user_info['is_admin'] && !$user_info['is_mod'] && !empty($modSettings['posts_require_captcha']) && ($user_info['posts'] < $modSettings['posts_require_captcha'] || ($user_info['is_guest'] && $modSettings['posts_require_captcha'] == -1)))
	{
		require_once($sourcedir . '/Subs-Editor.php');
		$verificationOptions = array(
			'id' => 'post',
		);
		$context['require_verification'] = create_control_verification($verificationOptions, true);
		if (is_array($context['require_verification']))
			$post_errors = array_merge($post_errors, $context['require_verification']);
	}

	require_once($sourcedir . '/Subs-Post.php');
	loadLanguage('Post');

	// Drafts enabled and needed?
	if (!empty($modSettings['drafts_enabled']) && (isset($_POST['save_draft']) || isset($_POST['id_draft'])))
		require_once($sourcedir . '/Drafts.php');

	// First check to see if they are trying to delete any current attachments.
	if (isset($_POST['attach_del']))
	{
		$keep_temp = array();
		$keep_ids = array();
		foreach ($_POST['attach_del'] as $dummy)
			if (strpos($dummy, 'post_tmp_' . $user_info['id']) !== false)
				$keep_temp[] = $dummy;
			else
				$keep_ids[] = (int) $dummy;

		if (isset($_SESSION['temp_attachments']))
			foreach($_SESSION['temp_attachments'] as $attachID => $attachment)
			{
				if ((isset($_SESSION['temp_attachments']['post']['files'], $attachment['name']) && in_array($attachment['name'], $_SESSION['temp_attachments']['post']['files'])) || in_array($attachID, $keep_temp) || strpos($attachID, 'post_tmp_' . $user_info['id']) === false)
					continue;

				unset($_SESSION['temp_attachments'][$attachID]);
				unlink($attachment['tmp_name']);
			}

		if (!empty($_REQUEST['msg']))
		{
			require_once($sourcedir . '/ManageAttachments.php');
			$attachmentQuery = array(
				'attachment_type' => 0,
				'id_msg' => (int) $_REQUEST['msg'],
				'not_id_attach' => $keep_ids,
			);
			removeAttachments($attachmentQuery);
		}
	}

	// Then try to upload any attachments.
	$context['can_post_attachment'] = !empty($modSettings['attachmentEnable']) && $modSettings['attachmentEnable'] == 1 && (allowedTo('post_attachment') || ($modSettings['postmod_active'] && allowedTo('post_unapproved_attachments')));
	if ($context['can_post_attachment'] && empty($_POST['from_qr']))
	{
		 require_once($sourcedir . '/Subs-Attachments.php');
		 processAttachments();
	}

	// If this isn't a new topic load the topic info that we need.
	if (!empty($topic))
	{
		$request = $smcFunc['db_query']('', '
			SELECT locked, is_sticky, id_poll, approved, id_first_msg, id_last_msg, id_member_started, id_board
			FROM {db_prefix}topics
			WHERE id_topic = {int:current_topic}
			LIMIT 1',
			array(
				'current_topic' => $topic,
			)
		);
		$topic_info = $smcFunc['db_fetch_assoc']($request);
		$smcFunc['db_free_result']($request);

		// Though the topic should be there, it might have vanished.
		if (!is_array($topic_info))
			fatal_lang_error('topic_doesnt_exist');

		// Did this topic suddenly move? Just checking...
		if ($topic_…