Nothing
#' Set or query message expiry or reply-by time
#'
#' Functions to specify the time at which a message expires or by which a reply
#' is requested.
#'
#' Manipulate the \code{Expires} and \code{Reply-By} fields as specified in
#' \href{https://www.ietf.org/rfc/rfc2156.txt}{RFC 2156}.
#'
#' @name cutoff
#'
#' @param msg A message object.
#' @param datetime Date and time.
#' @param tz A character string specifying the time zone.
#' @return A message object.
NULL
#' @rdname cutoff
#' @export
#'
#' @examples
#' envelope() %>%
#' expires("2030-01-01 13:25:00", "UTC")
expires <- function(msg, datetime = NULL, tz = "") {
if (is.null(datetime)) {
header_get(msg, "Expires")
} else {
datetime <- parse_datetime(datetime, tz) %>%
format_datetime()
msg <- header_set(msg, "Expires", datetime, append = FALSE)
if (get_option_invisible()) invisible(msg) else msg # nocov
}
}
#' @rdname cutoff
#' @export
#'
#' @examples
#' envelope() %>%
#' replyby("2021-12-25 06:00:00", "GMT")
replyby <- function(msg, datetime = NULL, tz = "") {
if (is.null(datetime)) {
header_get(msg, "Reply-By")
} else {
datetime <- parse_datetime(datetime, tz) %>%
format_datetime()
msg <- header_set(msg, "Reply-By", datetime, append = FALSE)
if (get_option_invisible()) invisible(msg) else msg # nocov
}
}
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