BBP_Akismet::check_post( string $post_data )

	public function check_post( $post_data ) {

		// Define local variables
		$user_data = array();
		$post_permalink = '';

		// Post is not published
		if ( bbp_get_public_status_id() !== $post_data['post_status'] )
			return $post_data;

		// Cast the post_author to 0 if it's empty
		if ( empty( $post_data['post_author'] ) )
			$post_data['post_author'] = 0;

		/** Author ************************************************************/

		// Get user data
		$userdata       = get_userdata( $post_data['post_author'] );
		$anonymous_data = bbp_filter_anonymous_post_data();

		// Author is anonymous
		if ( !empty( $anonymous_data ) ) {
			$user_data['name']    = $anonymous_data['bbp_anonymous_name'];
			$user_data['email']   = $anonymous_data['bbp_anonymous_email'];
			$user_data['website'] = $anonymous_data['bbp_anonymous_website'];

		// Author is logged in
		} elseif ( !empty( $userdata ) ) {
			$user_data['name']    = $userdata->display_name;
			$user_data['email']   = $userdata->user_email;
			$user_data['website'] = $userdata->user_url;

		// Missing author data, so set some empty strings
		} else {
			$user_data['name']    = '';
			$user_data['email']   = '';
			$user_data['website'] = '';
		}

		/** Post **************************************************************/

		// Use post parent for permalink
		if ( !empty( $post_data['post_parent'] ) )
			$post_permalink = get_permalink( $post_data['post_parent'] );

		// Put post_data back into usable array
		$_post = array(
			'comment_author'       => $user_data['name'],
			'comment_author_email' => $user_data['email'],
			'comment_author_url'   => $user_data['website'],
			'comment_content'      => $post_data['post_content'],
			'comment_post_ID'      => $post_data['post_parent'],
			'comment_type'         => $post_data['post_type'],
			'permalink'            => $post_permalink,
			'referrer'             => $_SERVER['HTTP_REFERER'],
			'user_agent'           => $_SERVER['HTTP_USER_AGENT'],
			'user_ID'              => $post_data['post_author'],
			'user_ip'              => bbp_current_author_ip(),
			'user_role'            => $this->get_user_roles( $post_data['post_author'] ),
		);

		// Check the post_data
		$_post = $this->maybe_spam( $_post );

		// Get the result
		$post_data['bbp_akismet_result'] = $_post['bbp_akismet_result'];
		unset( $_post['bbp_akismet_result'] );

		// Store the data as submitted
		$post_data['bbp_post_as_submitted'] = $_post;

		// Allow post_data to be manipulated
		do_action_ref_array( 'bbp_akismet_check_post', $post_data );

		// Spam
		if ( 'true' === $post_data['bbp_akismet_result'] ) {

			// Let plugins do their thing
			do_action( 'bbp_akismet_spam_caught' );

			// This is spam
			$post_data['post_status'] = bbp_get_spam_status_id();

			// We don't want your spam tags here
			add_filter( 'bbp_new_reply_pre_set_terms', array( $this, 'filter_post_terms' ), 1, 3 );

			// @todo Spam counter?
		}

		// @todo Topic/reply moderation? No true/false response - 'pending' or 'draft'
		// @todo Auto-delete old spam?

		// Log the last post
		$this->last_post = $post_data;

		// Pass the data back to the filter
		return $post_data;
	}