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#' Clear cache of all (or one) \code{pxweb} object
#'
#' @details
#' Clean the cache and sleep to restore api timing limit.
#'
#' @param x a \code{pxweb} object to clear cache for. Default is NULL (clear everything).
#'
#' @keywords internal
pxweb_clear_cache <- function(x = NULL) {
if (is.null(x)) {
files <- dir(pxweb_tempdir(), full.names = TRUE)
if (length(files) == 0) {
return(FALSE)
}
sleep_s <- numeric(length(files))
for (f in seq_along(files)) {
obj <- NULL # To capture a builde NOTE and safeguard for global variable handling
load(files[f])
time_diff_s <- as.numeric(Sys.time()) - as.numeric(obj$calls$time_stamps[[1]])
sleep_s[f] <- max(obj$config$period_in_seconds - time_diff_s, 0)
}
Sys.sleep(max(sleep_s))
file.remove(files)
return(TRUE)
} else {
checkmate::assert_class(x, "pxweb")
time_diff_s <- as.numeric(Sys.time()) - as.numeric(x$calls$time_stamps[[1]])
sleep_s <- max(x$config$period_in_seconds - time_diff_s, 0)
Sys.sleep(sleep_s)
if (file.exists(x$paths$rda_file_path)) file.remove(x$paths$rda_file_path)
return(TRUE)
}
}
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