bbp_check_for_moderation( array $anonymous_data = false, int $author_id, string $title = '', string $content = '' )

function bbp_check_for_moderation( $anonymous_data = false, $author_id = 0, $title = '', $content = '' ) {

	// Allow for moderation check to be skipped
	if ( apply_filters( 'bbp_bypass_check_for_moderation', false, $anonymous_data, $author_id, $title, $content ) )
		return true;

	// Bail if keymaster is author
	if ( !empty( $author_id ) && bbp_is_user_keymaster( $author_id ) )
		return true;

	// Define local variable(s)
	$_post     = array();
	$match_out = '';

	/** Blacklist *************************************************************/

	// Get the moderation keys
	$blacklist = trim( get_option( 'moderation_keys' ) );

	// Bail if blacklist is empty
	if ( empty( $blacklist ) )
		return true;

	/** User Data *************************************************************/

	// Map anonymous user data
	if ( !empty( $anonymous_data ) ) {
		$_post['author'] = $anonymous_data['bbp_anonymous_name'];
		$_post['email']  = $anonymous_data['bbp_anonymous_email'];
		$_post['url']    = $anonymous_data['bbp_anonymous_website'];

	// Map current user data
	} elseif ( !empty( $author_id ) ) {

		// Get author data
		$user = get_userdata( $author_id );

		// If data exists, map it
		if ( !empty( $user ) ) {
			$_post['author'] = $user->display_name;
			$_post['email']  = $user->user_email;
			$_post['url']    = $user->user_url;
		}
	}

	// Current user IP and user agent
	$_post['user_ip'] = bbp_current_author_ip();
	$_post['user_ua'] = bbp_current_author_ua();

	// Post title and content
	$_post['title']   = $title;
	$_post['content'] = $content;

	/** Max Links *************************************************************/

	$max_links = get_option( 'comment_max_links' );
	if ( !empty( $max_links ) ) {

		// How many links?
		$num_links = preg_match_all( '/<a [^>]*href/i', $content, $match_out );

		// Allow for bumping the max to include the user's URL
		$num_links = apply_filters( 'comment_max_links_url', $num_links, $_post['url'] );

		// Das ist zu viele links!
		if ( $num_links >= $max_links ) {
			return false;
		}
	}

	/** Words *****************************************************************/

	// Get words separated by new lines
	$words = explode( "\n", $blacklist );

	// Loop through words
	foreach ( (array) $words as $word ) {

		// Trim the whitespace from the word
		$word = trim( $word );

		// Skip empty lines
		if ( empty( $word ) ) { continue; }

		// Do some escaping magic so that '#' chars in the
		// spam words don't break things:
		$word    = preg_quote( $word, '#' );
		$pattern = "#$word#i";

		// Loop through post data
		foreach ( $_post as $post_data ) {

			// Check each user data for current word
			if ( preg_match( $pattern, $post_data ) ) {

				// Post does not pass
				return false;
			}
		}
	}

	// Check passed successfully
	return true;
}