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#' Download TIGER shapes for states
#'
#' @templateVar year TRUE
#' @template template
#'
#' @return sf data.frame
#' @export
#'
#' @concept spine
#'
#' @examples
#' # Wrapped in try due to false positive 304 errors
#' \donttest{try(tt_states())}
tt_states <- function(year = 2022) {
years_okay(year)
dec_yr <- pad_str(year %% 2000 - (year %% 10))
url_adj <- ""
if (year <= 2010) {
url_adj <- paste0("/20", dec_yr)
year <- 2010
} else {
dec_yr <- ""
}
zip_url <- glue::glue("{base_url(year)}/STATE{url_adj}/tl_{year}_us_state{dec_yr}.zip")
target <- glue::glue("tl_{year}_us_state{dec_yr}.shp")
adj_class(tt_download_read(url = zip_url, target_file = target))
}
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