<?
/*********************************************************************\
//--------------Mod thread-------------------------------------------//

This page gets called if we're editing a thread. 

Known issues:
If multiple threads are moved before forum activity occurs then 
threads will linger with the 'Moved' flag until they're knocked off 
the front page.

\*********************************************************************/

// Quick SQL injection check
if(!is_number($_POST['threadid'])) { error(404); }
if($_POST['title'] == ''){ error(0); }
// End injection check
// Make sure they are moderators
if(!check_perms('site_moderate_forums')) { error(403); }
authorize();

// Variables for database input

$TopicID = (int)$_POST['threadid'];
$Sticky = (isset($_POST['sticky'])) ? 1 : 0;
$Locked = (isset($_POST['locked'])) ? 1 : 0;
$Title = db_string($_POST['title']);
$RawTitle = $_POST['title'];
$ForumID = (int)$_POST['forumid'];
$Page = (int)$_POST['page'];


if ($Locked == 1) {

	$DB->query("DELETE FROM forums_last_read_topics WHERE TopicID='$TopicID'");
}

$DB->query("SELECT
	t.ForumID,
	f.MinClassWrite,
	COUNT(p.ID) AS Posts
	FROM forums_topics AS t
	LEFT JOIN forums_posts AS p ON p.TopicID=t.ID
	LEFT JOIN forums AS f ON f.ID=.t.ForumID
	WHERE t.ID='$TopicID'
	GROUP BY p.TopicID");
list($OldForumID, $MinClassWrite, $Posts) = $DB->next_record();

if($MinClassWrite > $LoggedUser['Class']) { error(403); }

// If we're moving
$Cache->delete_value('forums_'.$ForumID);
$Cache->delete_value('forums_'.$OldForumID);

// If we're deleting a thread
if(isset($_POST['delete'])) {
	if(check_perms('site_admin_forums')) {
		$DB->query("DELETE FROM forums_posts WHERE TopicID='$TopicID'");
		$DB->query("DELETE FROM forums_topics WHERE ID='$TopicID'");
		
		$DB->query("SELECT 
			t.ID,
			t.LastPostID,
			t.Title,
			p.AuthorID,
			um.Username,
			p.AddedTime, 
			(SELECT COUNT(pp.ID) FROM forums_posts AS pp JOIN forums_topics AS tt ON pp.TopicID=tt.ID WHERE tt.ForumID='$ForumID'),
			t.IsLocked,
			t.IsSticky
			FROM forums_topics AS t 
			JOIN forums_posts AS p ON p.ID=t.LastPostID 
			LEFT JOIN users_main AS um ON um.ID=p.AuthorID
			WHERE t.ForumID='$ForumID'
			GROUP BY t.ID
			ORDER BY t.LastPostID DESC LIMIT 1");
		list($NewLastTopic, $NewLastPostID, $NewLastTitle, $NewLastAuthorID, $NewLastAuthorName, $NewLastAddedTime, $NumPosts, $NewLocked, $NewSticky) = $DB->next_record(MYSQLI_BOTH, false);
		
		$DB->query("UPDATE forums SET 
			NumTopics=NumTopics-1, 
			NumPosts=NumPosts-'$Posts',
			LastPostTopicID='$NewLastTopic',
			LastPostID='$NewLastPostID',
			LastPostAuthorID='$NewLastAuthorID',
			LastPostTime='$NewLastAddedTime'
			WHERE ID='$ForumID'");
		
		$Cache->delete('thread_'.$TopicID);
		
		
		$Cache->begin_transaction('forums_list');
		$UpdateArray = array(
			'NumPosts'=>$NumPosts,
			'NumTopics'=>'-1',
			'LastPostID'=>$NewLastPostID,
			'LastPostAuthorID'=>$NewLastAuthorID,
			'LastPostTopicID'=>$NewLastTopic,
			'LastPostTime'=>$NewLastAddedTime,
			'Title'=>$NewLastTitle,
			'IsLocked'=>$NewLocked,
			'IsSticky'=>$NewSticky
			);
		
		$Cache->update_row($ForumID, $UpdateArray);
		$Cache->commit_transaction(0);
		$Cache->delete_value('thread_'.$TopicID.'_info');

		header('Location: forums.php?action=viewforum&forumid='.$ForumID);
	} else {
		error(403);
	}

} else { // If we're just editing it
	
	$Cache->begin_transaction('thread_'.$TopicID.'_info');
	$UpdateArray = array(
		'IsSticky'=>$Sticky,
		'IsLocked'=>$Locked,
		'Title'=>cut_string($RawTitle, 150, 1, 0),
		'ForumID'=>$ForumID
		);
	$Cache->update_row(false, $UpdateArray);
	$Cache->commit_transaction(0);
	
	$DB->query("UPDATE forums_topics SET
		IsSticky = '$Sticky',
		IsLocked = '$Locked',
		Title = '$Title',
		ForumID ='$ForumID' 
		WHERE ID='$TopicID'");
	
	
	if($ForumID!=$OldForumID) { // If we're moving a thread, change the forum stats
		
		$DB->query("SELECT MinClassRead, MinClassWrite, Name FROM forums WHERE ID='$ForumID'");
		list($MinClassRead, $MinClassWrite, $ForumName) = $DB->next_record();
		$Cache->begin_transaction('thread_'.$TopicID.'_info');
		$UpdateArray = array(
			'ForumName'=>$ForumName,
			'MinClassRead'=>$MinClassRead,
			'MinClassWrite'=>$MinClassWrite
			);
		$Cache->update_row(false, $UpdateArray);
		$Cache->commit_transaction(3600*24*5);
		
		$Cache->begin_transaction('forums_list');
		
		
		// Forum we're moving from
		$DB->query("SELECT 
			t.ID,
			t.LastPostID,
			t.Title,
			p.AuthorID,
			um.Username,
			p.AddedTime, 
			(SELECT COUNT(pp.ID) FROM forums_posts AS pp JOIN forums_topics AS tt ON pp.TopicID=tt.ID WHERE tt.ForumID='$OldForumID'),
			t.IsLocked,
			t.IsSticky
			FROM forums_topics AS t 
			JOIN forums_posts AS p ON p.ID=t.LastPostID 
			LEFT JOIN users_main AS um ON um.ID=p.AuthorID
			WHERE t.ForumID='$OldForumID'
			ORDER BY t.LastPostID DESC LIMIT 1");
		list($NewLastTopic, $NewLastPostID, $NewLastTitle, $NewLastAuthorID, $NewLastAuthorName, $NewLastAddedTime, $NumPosts, $NewLocked, $NewSticky) = $DB->next_record(MYSQLI_NUM, false);
		
		$DB->query("UPDATE forums SET 
			NumTopics=NumTopics-1, 
			NumPosts=NumPosts-'$Posts',
			LastPostTopicID='$NewLastTopic',
			LastPostID='$NewLastPostID',
			LastPostAuthorID='$NewLastAuthorID',
			LastPostTime='$NewLastAddedTime'
			WHERE ID='$OldForumID'");
		
		
		$UpdateArray = array(
			'NumPosts'=>$NumPosts,
			'NumTopics'=>'-1',
			'LastPostID'=>$NewLastPostID,
			'LastPostAuthorID'=>$NewLastAuthorID,
			'LastPostTopicID'=>$NewLastTopic,
			'LastPostTime'=>$NewLastAddedTime,
			'Title'=>$NewLastTitle,
			'IsLocked'=>$NewLocked,
			'IsSticky'=>$NewSticky
			);
		
	
		$Cache->update_row($OldForumID, $UpdateArray);

		// Forum we're moving to
		
		$DB->query("SELECT 
			t.ID,
			t.LastPostID,
			t.Title,
			p.AuthorID,
			um.Username,
			p.AddedTime, 
			(SELECT COUNT(pp.ID) FROM forums_posts AS pp JOIN forums_topics AS tt ON pp.TopicID=tt.ID WHERE tt.ForumID='$ForumID')
			FROM forums_topics AS t 
			JOIN forums_posts AS p ON p.ID=t.LastPostID 
			LEFT JOIN users_main AS um ON um.ID=p.AuthorID
			WHERE t.ForumID='$ForumID'
			ORDER BY t.LastPostID DESC LIMIT 1");
		list($NewLastTopic, $NewLastPostID, $NewLastTitle, $NewLastAuthorID, $NewLastAuthorName, $NewLastAddedTime, $NumPosts) = $DB->next_record();
		
		$DB->query("UPDATE forums SET 
			NumTopics=NumTopics+1, 
			NumPosts=NumPosts+'$Posts',
			LastPostTopicID='$NewLastTopic',
			LastPostID='$NewLastPostID',
			LastPostAuthorID='$NewLastAuthorID',
			LastPostTime='$NewLastAddedTime'
			WHERE ID='$ForumID'");
		
		
		$UpdateArray = array(
			'NumPosts'=>($NumPosts+$Posts),
			'NumTopics'=>'+1',
			'LastPostID'=>$NewLastPostID,
			'LastPostAuthorID'=>$NewLastAuthorID,
			'LastPostTopicID'=>$NewLastTopic,
			'LastPostTime'=>$NewLastAddedTime,
			'Title'=>$NewLastTitle
			);
		
	
		$Cache->update_row($ForumID, $UpdateArray);
		
		$Cache->commit_transaction(0);
	} else { // Editing 
		$DB->query("SELECT LastPostTopicID FROM forums WHERE ID='$ForumID'");
		list($LastTopicID) = $DB->next_record();
		if($LastTopicID == $TopicID) {
			$UpdateArray = array(
				'Title'=>$RawTitle,
				'IsLocked'=>$Locked,
				'IsSticky'=>$Sticky
			);
			$Cache->begin_transaction('forums_list');
			$Cache->update_row($ForumID, $UpdateArray);
			$Cache->commit_transaction(0);
		}
	}
	if($Locked) {
		$CatalogueID = floor($NumPosts/THREAD_CATALOGUE);
		for($i=0;$i<=$CatalogueID;$i++) {
			$Cache->expire_value('thread_'.$TopicID.'_catalogue_'.$i,3600*24*7);
		}
		$Cache->expire_value('thread_'.$TopicID.'_info',3600*24*7);
		
		$DB->query('UPDATE forums_polls SET Closed=\'0\' WHERE TopicID=\''.$TopicID.'\'');
		$Cache->delete_value('polls_'.$TopicID);
	}
	header('Location: forums.php?action=viewthread&threadid='.$TopicID.'&page='.$Page);
}