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#' Get a source of economic data
#'
#' @param source_id An integer ID for the data source.
#'
#' @param realtime_start A `Date` indicating the start of the real-time period.
#' Defaults to today's date. For more information, see
#' [Real-Time Periods](https://fred.stlouisfed.org/docs/api/fred/realtime_period.html).
#'
#' @param realtime_end A `Date` indicating the end of the real-time period.
#' Defaults to today's date. For more information, see
#' [Real-Time Periods](https://fred.stlouisfed.org/docs/api/fred/realtime_period.html).
#'
#' @param ... These dots only exist for future extensions and should be empty.
#'
#' @return A `tibble` object.
#'
#' @section API Documentation:
#'
#' [fred/source](https://fred.stlouisfed.org/docs/api/fred/source.html)
#'
#' @seealso [fredr_sources()], [fredr_source_releases()]
#'
#' @examples
#' if (fredr_has_key()) {
#' fredr_source(source_id = 14L)
#'
#' # Has this source ID ever changed over time?
#' fredr_source(source_id = 14L, realtime_start = as.Date("1990-01-01"))
#' }
#' @export
fredr_source <- function(source_id,
...,
realtime_start = NULL,
realtime_end = NULL) {
check_dots_empty(...)
check_not_null(source_id, "source_id")
user_args <- capture_args(
source_id = source_id,
realtime_start = realtime_start,
realtime_end = realtime_end
)
fredr_args <- list(
endpoint = "source"
)
do.call(fredr_request, c(fredr_args, user_args))
}
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