bp_nouveau_ajax_messages_thread_read()

function bp_nouveau_ajax_messages_thread_read() {
	if ( empty( $_POST['nonce'] ) || ! wp_verify_nonce( $_POST['nonce'], 'bp_nouveau_messages' ) ) {
		wp_send_json_error();
	}

	if ( empty( $_POST['id'] ) || empty( $_POST['message_id'] ) ) {
		wp_send_json_error();
	}

	$thread_id  = (int) $_POST['id'];
	$message_id = (int) $_POST['message_id'];

	if ( ! messages_is_valid_thread( $thread_id ) || ( ! messages_check_thread_access( $thread_id ) && ! bp_current_user_can( 'bp_moderate' ) ) ) {
		wp_send_json_error();
	}

	// Mark thread as read
	messages_mark_thread_read( $thread_id );

	// Mark latest message as read
	if ( bp_is_active( 'notifications' ) ) {
		bp_notifications_mark_notifications_by_item_id( bp_loggedin_user_id(), (int) $message_id, buddypress()->messages->id, 'new_message' );
	}

	wp_send_json_success();
}