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#' Download datasets from the Roper Center
#'
#' \code{roper_download} provides a programmatic and reproducible means to download
#' datasets from the Roper Center's data archive
#'
#' @param file_id The unique identifier (or optionally a vector of these identifiers)
#' for the dataset(s) to be downloaded (see details). Both new Archive Numbers and old
#' Historical Archive Numbers, if the latter are available, may be used.
#' @param affiliation,email,password Your Roper Center affiliation, email, and password
#' (see details)
#' @param reset If TRUE, you will be asked to re-enter your Roper Center affiliation,
#' email, and password.
#' @param download_dir The directory (relative to your working directory) to
#' which files from the Roper Center will be downloaded.
#' @param msg If TRUE, outputs a message showing which data set is being downloaded.
#' @param convert If TRUE, converts downloaded file(s) to .RData format.
#' @param delay If the speed of your connection to the Roper Center data archive is particularly slow,
#' \code{roper_download} may encounter problems. Increasing the \code{delay} parameter
#' may help.
#'
#' @details
#' To avoid requiring others to edit your scripts to insert their own affiliation,
#' email, and password or to force them to do so interactively, the default is set
#' to fetch this information from the user's .Rprofile. Before running
#' \code{roper_download}, then, you should be sure to add these options to your
#' .Rprofile (\code{usethis::edit_r_profile()} is one particularly easy way),
#' substituting your own info for the example below:
#'
#' \code{
#' options("roper_affiliation" = "Upper Midwest University",
#' "roper_email" = "juanita-herrara@uppermidwest.edu",
#' "roper_password" = "password123!")
#' }
#'
#' @return The function returns nothing, but has the side effect of downloading
#' all files of the datasets identified in the file_id argument.
#'
#' @examples
#' \dontrun{
#' roper_download(file_id = c("31117412", "USPEW2015-GOVERNANCE"),
#' download_dir = tempdir()) # remember to specify a directory for your download
#' }
#'
#' @import RSelenium
#' @importFrom stringr str_detect str_subset str_replace str_extract_all
#' @importFrom magrittr '%>%'
#' @importFrom rio export
#' @importFrom haven read_dta read_por
#' @importFrom foreign read.spss
#' @importFrom netstat free_port
#' @importFrom stats rnorm
#'
#' @export
roper_download <- function(file_id,
affiliation = getOption("roper_affiliation"),
email = getOption("roper_email"),
password = getOption("roper_password"),
reset = FALSE,
download_dir = "roper_data",
msg = TRUE,
convert = TRUE,
delay = 2) {
. <- NULL # satisfy CRAN check
file_id <- as.character(file_id)
# detect login info
if (reset) {
affiliation <- email <- password <- NULL
}
if (is.null(affiliation)) {
roper_affiliation <- readline(prompt = "The Roper Center requires your user account information. Please enter the member organization that you are affiliated with: \n")
options("roper_affiliation" = roper_affiliation)
affiliation <- getOption("roper_affiliation")
}
if (is.null(email)) {
roper_email <- readline(prompt = "The Roper Center requires your user account information. Please enter your email address: \n")
options("roper_email" = roper_email)
email <- getOption("roper_email")
}
if (is.null(password)) {
roper_password <- readline(prompt = "Please enter your Roper Center password: \n")
options("roper_password" = roper_password)
password <- getOption("roper_password")
}
# build path to firefox's default download directory
if (Sys.info()[["sysname"]]=="Linux") {
default_dir <- file.path("home", Sys.info()[["user"]], "Downloads")
} else {
default_dir <- file.path("", "Users", Sys.info()[["user"]], "Downloads")
}
# create specified download directory if necessary
if (!dir.exists(download_dir)) dir.create(download_dir, recursive = TRUE)
# initialize driver
if (msg) message("Initializing RSelenium driver")
rD <- rsDriver(browser="firefox",
port = free_port(),
verbose = FALSE,
chromever = NULL)
remDr <- rD$client
# sign in
signin <- "https://ropercenter.cornell.edu/ipoll/login"
remDr$navigate(signin)
Sys.sleep(delay)
remDr$findElement(using = "id", "react-select-2-input")$sendKeysToElement(list(affiliation, key = "enter"))
remDr$findElement(using = "id", "username")$sendKeysToElement(list(email))
remDr$findElement(using = "id", "password")$sendKeysToElement(list(password))
remDr$findElement(using = "css", ".btn.btn-primary.float-right")$clickElement()
if (try(unlist(remDr$findElement(using = "class", "accept-container")$getElementAttribute('id')), silent = TRUE) == "") { # check for cookies pop-up
remDr$findElement(using = "css", ".accept-container .btn-primary")$clickElement() # accept cookies
}
Sys.sleep(delay)
# Loop through files
for (i in seq(file_id)) {
item <- file_id[[i]]
if (msg) message("Downloading Roper Center file: ", item, sprintf(" (%s)", Sys.time()))
# get list of current default download directory contents
dd_old <- list.files(default_dir)
# navigate to study page
url <- paste0("https://ropercenter.cornell.edu/ipoll/study/", item)
remDr$navigate(url)
Sys.sleep(delay)
if (try(unlist(remDr$findElement(using = "class", "accept-container")$getElementAttribute('id')), silent = TRUE) == "") { # check for cookies pop-up
remDr$findElement(using = "css", ".accept-container .btn-primary")$clickElement() # accept cookies
}
# switch to download tab
remDr$findElement(using = "css", "#download-tab")$clickElement()
download_links <- remDr$getPageSource()[[1]] %>%
stringr::str_extract_all('rc-download-btn[^"]*') %>%
`[[`(1) %>%
paste0("#", .)
download_files <- remDr$getPageSource()[[1]] %>%
stringr::str_extract_all('(?<=\\()[^)]+\\.[a-z]{3,4}(?=\\))') %>%
`[[`(1)
# download all files
for (j in seq_along(download_links)) {
new_dd_old <- list.files(default_dir)
remDr$findElement(using = "css", download_links[j])$clickElement() # initiate data download
Sys.sleep(delay * .61)
element <- try(unlist(remDr$findElement(using = "css", "#rc-downloads-tc-modal-accept-btn")$getElementAttribute('id')), silent = TRUE)
if (element == "rc-downloads-tc-modal-accept-btn") { # check for terms pop-up
remDr$findElement(using = "css", "#rc-downloads-tc-modal-accept-btn")$clickElement() # accept terms
}
# check that download has completed
dd_new <- setdiff(list.files(default_dir), new_dd_old)
jj = 0
tryCatch(
while(length(dd_new) == 0) { # has download started?
Sys.sleep(abs(rnorm(1)))
dd_new <- setdiff(list.files(default_dir), new_dd_old)
message("waiting for download to start")
if (jj < 10)
jj = jj + 1
else {
message("attempting to start download again")
remDr$findElement(using = "css", download_links[j])$clickElement() # initiate data download
Sys.sleep(sum(abs(rnorm(delay))))
element <- try(unlist(remDr$findElement(using = "css", "#rc-downloads-tc-modal-accept-btn")$getElementAttribute('id')), silent = TRUE)
if (element == "rc-downloads-tc-modal-accept-btn") { # check for terms pop-up
remDr$findElement(using = "css", "#rc-downloads-tc-modal-accept-btn")$clickElement() # accept terms
Sys.sleep(1)
}
Sys.sleep(abs(rnorm(1)))
jj = 0
}
}, error = function(e) 1
)
while(any(stringr::str_detect(dd_new, "\\.part$"))) { # has download finished?
Sys.sleep(1)
dd_new <- setdiff(list.files(default_dir), new_dd_old)
message("waiting for download to finish")
}
Sys.sleep(sum(abs(rnorm(delay*2))))
}
dd_new <- setdiff(list.files(default_dir), dd_old)
# move to specified directory
dir.create(file.path(download_dir, item), showWarnings = FALSE)
for (ii in seq_along(dd_new)) {
file.rename(from = file.path(default_dir, dd_new[ii]), to = file.path(download_dir, item, dd_new[ii]))
unlink(file.path(default_dir, dd_new[ii]))
}
# convert to .RData
spss <- 0
if (convert == TRUE) {
if (any(stringr::str_detect(dd_new, "dta|DTA"))) {
tryCatch(
haven::read_dta(file.path(download_dir, item, stringr::str_subset(dd_new, "\\.dta|DTA")), encoding = "latin1") %>%
rio::export(stringr::str_replace(file.path(download_dir, item, stringr::str_subset(dd_new, "\\.(dta|DTA)")), "\\.(dta|DTA)", ".RData")),
error = function(e) spss <- 1
)
}
if (any(stringr::str_detect(dd_new, "dta|DTA")) == FALSE | spss == 1) {
tryCatch(
{data_file <- stringr::str_subset(dd_new, "\\.por")
x <- tryCatch(haven::read_por(file.path(download_dir, item, data_file)),
error = function(e) {
foreign::read.spss(file.path(download_dir, item, data_file),
to.data.frame = TRUE,
use.value.labels = FALSE)
})
save(x, file = stringr::str_replace(file.path(download_dir, item, data_file), "\\.por$", ".RData"))},
error = function(e) warning(paste("Conversion from .por to .RData failed for", item))
)
}
}
}
# Close driver
remDr$close()
rD[["server"]]$stop()
}
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