R/get_all_committees.R

In stortingscrape: Access Data from the Norwegian Parliament API

#' Parliamentary committees over all sessions
#'
#' @description Imports data on all committee names and ids over all sessions
#' in the data.stortinget.no API.
#'
#' @usage get_all_committees()
#'
#'
#' @return A data frame of committees, with the variables:
#'
#' |                   |                           |
#' |:------------------|:--------------------------|
#' | **response_date** | Date of data retrieval    |
#' | **version**       | Data version from the API |
#' | **id**            | Id of the committee       |
#' | **name**          | Name of the committee     |
#' | **sessionid**     | Id of session (empty)     |
#'
#' @md
#'
#' @seealso [get_session_committees]
#'
#'
#' @examples
#' \dontrun{
#' coms <- get_all_committees()
#' head(coms)
#' }
#'
#' @import httr2 rvest
#' @export
get_all_committees <- function(){

  url <- "https://data.stortinget.no/eksport/allekomiteer"

  base <- request(url)
  
  resp <- base |> 
    req_error(is_error = function(resp) FALSE) |> 
    req_perform()

  if(resp$status_code != 200) {
    stop(
      paste0(
        "Response of ", 
        url, 
        " is '", 
        resp |> resp_status_desc(),
        "' (",
        resp$status_code,
        ")."
      ), 
      call. = FALSE)
  }
  
  if(resp_content_type(resp) != "text/xml") {
    stop(
      paste0(
        "Response of ", 
        url, 
        " returned as '", 
        resp_content_type(resp), 
        "'.",
        " Should be 'text/xml'."), 
      call. = FALSE) 
  }

  tmp <- resp |> 
    resp_body_html(check_type = FALSE, encoding = "utf-8") 
  
  tmp <- data.frame(response_date = tmp |> html_elements("komiteer_liste > komite > respons_dato_tid") |> html_text(),
                    version = tmp |> html_elements("komiteer_liste > komite > versjon") |> html_text(),
                    id = tmp |> html_elements("komiteer_liste > komite > id") |> html_text(),
                    name = tmp |> html_elements("komiteer_liste > komite > navn") |> html_text(),
                    sessionid = tmp |> html_elements("sesjon_id") |> html_text())

  return(tmp)

}