diff --git a/inc/filters.php b/inc/filters.php
index 2a7c1554..9fe0fe37 100644
--- a/inc/filters.php
+++ b/inc/filters.php
@@ -5,271 +5,41 @@
  */
 
 use Vichan\Context;
-use Vichan\Data\IpNoteQueries;
+use Vichan\Controller\FloodManager;
 
 defined('TINYBOARD') or exit;
 
-class Filter {
-	public $flood_check;
-	private $condition;
-	private $post;
+function do_filters(Context $ctx, array $post): void {
+	$config = $ctx->get('config');
 
-
-	public function __construct(array $arr) {
-		foreach ($arr as $key => $value) {
-			$this->$key = $value;
-		}
-	}
-
-	public function match($condition, $match) {
-		$condition = strtolower($condition);
-		$post = &$this->post;
-
-		switch($condition) {
-			case 'custom':
-				if (!is_callable($match)) {
-					error('Custom condition for filter is not callable!');
-				}
-				return $match($post);
-			case 'flood-match':
-				if (!is_array($match)) {
-					error('Filter condition "flood-match" must be an array.');
-				}
-
-				// Filter out "flood" table entries which do not match this filter.
-
-				$flood_check_matched = array();
-
-				foreach ($this->flood_check as $flood_post) {
-					foreach ($match as $flood_match_arg) {
-						switch ($flood_match_arg) {
-							case 'ip':
-								if ($flood_post['ip'] != $_SERVER['REMOTE_ADDR']) {
-									continue 3;
-								}
-								break;
-							case 'body':
-								if ($flood_post['posthash'] != make_comment_hex($post['body_nomarkup'])) {
-									continue 3;
-								}
-								break;
-							case 'file':
-								if (!isset($post['filehash'])) {
-									return false;
-								}
-								if ($flood_post['filehash'] != $post['filehash']) {
-									continue 3;
-								}
-								break;
-							case 'board':
-								if ($flood_post['board'] != $post['board']) {
-									continue 3;
-								}
-								break;
-							case 'isreply':
-								if ($flood_post['isreply'] == $post['op']) {
-									continue 3;
-								}
-								break;
-							default:
-								error('Invalid filter flood condition: ' . $flood_match_arg);
-						}
-					}
-					$flood_check_matched[] = $flood_post;
-				}
-
-				$this->flood_check = $flood_check_matched;
-				return !empty($this->flood_check);
-			case 'flood-time':
-				foreach ($this->flood_check as $flood_post) {
-					if (time() - $flood_post['time'] <= $match) {
-						return true;
-					}
-				}
-				return false;
-			case 'flood-count':
-				$count = 0;
-				foreach ($this->flood_check as $flood_post) {
-					if (time() - $flood_post['time'] <= $this->condition['flood-time']) {
-						++$count;
-					}
-				}
-				return $count >= $match;
-			case 'name':
-				return preg_match($match, $post['name']);
-			case 'trip':
-				return $match === $post['trip'];
-			case 'email':
-				return preg_match($match, $post['email']);
-			case 'subject':
-				return preg_match($match, $post['subject']);
-			case 'body':
-				return preg_match($match, $post['body_nomarkup']);
-			case 'filehash':
-				return $match === $post['filehash'];
-			case 'filename':
-				if (!$post['files']) {
-					return false;
-				}
-
-				foreach ($post['files'] as $file) {
-					if (preg_match($match, $file['filename'])) {
-						return true;
-					}
-				}
-				return false;
-			case 'extension':
-				if (!$post['files']) {
-					return false;
-				}
-
-				foreach ($post['files'] as $file) {
-					if (preg_match($match, $file['extension'])) {
-						return true;
-					}
-				}
-				return false;
-			case 'ip':
-				return preg_match($match, $_SERVER['REMOTE_ADDR']);
-			case 'op':
-				return $post['op'] == $match;
-			case 'has_file':
-				return $post['has_file'] == $match;
-			case 'board':
-				return $post['board'] == $match;
-			case 'password':
-				return $post['password'] == $match;
-			case 'unshorten':
-				$extracted_urls = get_urls($post['body_nomarkup']);
-				foreach ($extracted_urls as $url) {
-					if (preg_match($match, trace_url($url))) {
-						return true;
-					}
-				}
-				return false;
-			default:
-				error('Unknown filter condition: ' . $condition);
-		}
-	}
-
-	public function action(Context $ctx) {
-		global $board;
-
-		$this->add_note = isset($this->add_note) ? $this->add_note : false;
-		if ($this->add_note) {
-			$note_queries = $ctx->get(IpNoteQueries::class);
-			$note_queries->add($_SERVER['REMOTE_ADDR'], -1, 'Autoban message: ' . $this->post['body']);
-		}
-		if (isset($this->action)) {
-			switch($this->action) {
-				case 'reject':
-					error(isset($this->message) ? $this->message : 'Posting throttled by filter.');
-				case 'ban':
-					if (!isset($this->reason)) {
-						error('The ban action requires a reason.');
-					}
-
-					$this->expires = isset($this->expires) ? $this->expires : false;
-					$this->reject = isset($this->reject) ? $this->reject : true;
-					$this->all_boards = isset($this->all_boards) ? $this->all_boards : false;
-
-					Bans::new_ban($_SERVER['REMOTE_ADDR'], $this->reason, $this->expires, $this->all_boards ? false : $board['uri'], -1);
-
-					if ($this->reject) {
-						if (isset($this->message)) {
-							error($message);
-						}
-
-						checkBan($board['uri']);
-						exit;
-					}
-
-					break;
-				default:
-					error('Unknown filter action: ' . $this->action);
-			}
-		}
-	}
-
-	public function check(array $post) {
-		$this->post = $post;
-		foreach ($this->condition as $condition => $value) {
-			if ($condition[0] == '!') {
-				$NOT = true;
-				$condition = substr($condition, 1);
-			} else {
-				$NOT = false;
-			}
-
-			if ($this->match($condition, $value) == $NOT) {
-				return false;
-			}
-		}
-		return true;
-	}
-}
-
-function purge_flood_table() {
-	global $config;
-
-	// Determine how long we need to keep a cache of posts for flood prevention. Unfortunately, it is not
-	// aware of flood filters in other board configurations. You can solve this problem by settings the
-	// config variable $config['flood_cache'] (seconds).
-
-	if ($config['flood_cache'] != -1) {
-		$max_time = &$config['flood_cache'];
-	} else {
-		$max_time = 0;
-		foreach ($config['filters'] as $filter) {
-			if (isset($filter['condition']['flood-time'])) {
-				$max_time = max($max_time, $filter['condition']['flood-time']);
-			}
-		}
-	}
-
-	$time = time() - $max_time;
-
-	query("DELETE FROM ``flood`` WHERE `time` < $time") or error(db_error());
-}
-
-function do_filters(Context $ctx, array $post) {
-	global $config;
-
-	if (!isset($config['filters']) || empty($config['filters'])) {
+	if (empty($config['filters'])) {
 		return;
 	}
 
-	foreach ($config['filters'] as $filter) {
-		if (isset($filter['condition']['flood-match'])) {
-			$has_flood = true;
-			break;
+	$floodManager = $ctx->get(FloodManager::class);
+	$filterResult = $floodManager->processPost($post);
+
+	if ($filterResult) {
+		$action = $filterResult['action'] ?? 'reject';
+
+		if ($action === 'reject') {
+			error($filterResult['message'] ?? _('Posting throttled by filter.'));
+		} elseif ($action === 'ban') {
+			Bans::new_ban(
+				$post['ip'],
+				$filterResult['reason'] ?? _('Banned by filter'),
+				$filterResult['expires'] ?? false,
+				$filterResult['all_boards'] ? false : $post['board'],
+				-1
+			);
+
+			if ($filterResult['reject'] ?? true) {
+				error(
+					$filterResult['message']
+					??
+					_('You have been banned. <a href="/banned.php">Click here to view.</a>')
+				);
+			}
 		}
 	}
-
-	if (isset($has_flood)) {
-		if ($post['has_file']) {
-			$query = prepare("SELECT * FROM ``flood`` WHERE `ip` = :ip OR `posthash` = :posthash OR `filehash` = :filehash");
-			$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
-			$query->bindValue(':posthash', make_comment_hex($post['body_nomarkup']));
-			$query->bindValue(':filehash', $post['filehash']);
-		} else {
-			$query = prepare("SELECT * FROM ``flood`` WHERE `ip` = :ip OR `posthash` = :posthash");
-			$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
-			$query->bindValue(':posthash', make_comment_hex($post['body_nomarkup']));
-		}
-		$query->execute() or error(db_error($query));
-		$flood_check = $query->fetchAll(PDO::FETCH_ASSOC);
-	} else {
-		$flood_check = false;
-	}
-
-	foreach ($config['filters'] as $filter_array) {
-		$filter = new Filter($filter_array);
-		$filter->flood_check = $flood_check;
-		if ($filter->check($post)) {
-			$filter->action($ctx);
-		}
-	}
-
-	purge_flood_table();
 }