experimental.R

# get_vpn_data <- function(final_url, vpn_host = "", vpn_port = "", cookie = "", time_out = 10){
#
#   if(vpn_host == ""){
#     vpn_host <- Sys.getenv("tiktok_vpn_host")
#   }
#
#   if(vpn_port == ""){
#     vpn_port <- Sys.getenv("tiktok_vpn_port")
#   }
#
#   head <- list(
#     method = "GET",
#     referer = "https://www.tiktok.com/trending?lang=en",
#     `user-agent` = Sys.getenv("TIKTOK_UA"),
#     cookie = cookie
#   )
#
#   data <- list(url = final_url, head = head)
#
#   req <- try({
#     httr::POST(glue::glue("http://{vpn_host}:{vpn_port}/get"), body = data,  encode = "json", timeout = httr::timeout(time_out))
#   })
#
#   if(req$status_code == 500) stop(jsonlite::fromJSON(rawToChar(req$content))$message)
#
#   return(req)
# }

#' @export
shape_headers <- function(headers){
  headers %>%
    imap_chr(~{
      glue::glue("-H '{.y}: {.x}'")
    }) %>%
    paste(collapse = " ")
}

#' @export
get_vpn_data <- function(final_url, vpn_host = "", vpn_port = "", cookie = "", time_out = 10){

  if(vpn_host == ""){
    vpn_host <- Sys.getenv("tiktok_vpn_host")
  }

  if(vpn_port == ""){
    vpn_port <- Sys.getenv("tiktok_vpn_port")
  }

  if(!exists("current_server")) stop("current_server not found")
  server <- .GlobalEnv$current_server
  cookie <- ifelse(cookie == "", "", paste0("; ", cookie))

  head <- c(
    method = "GET",
    referer = "https://www.tiktok.com/foryou",
    `user-agent` = Sys.getenv("TIKTOK_UA"),
    cookie = glue::glue("tt_webid_v2={paste(sample(1:10, 19, replace = T), collapse = '')}{cookie}")
  )

  cmd <- glue::glue("curl '{URLencode(final_url)}' {shape_headers(head)} --compressed")

  # data <- list(url = final_url, head = head)
  #
  # req <- try({
  #   httr::POST(glue::glue("http://{vpn_host}:{vpn_port}/get"), body = data,  encode = "json", timeout = httr::timeout(time_out))
  # })
  #
  # if(req$status_code == 500) stop(jsonlite::fromJSON(rawToChar(req$content))$message)
  req <- ssh::ssh_exec_internal(server$session, command = cmd)
  req <- list(content = req$stdout)

  return(req)
}

#' @export
get_new_verify <- function(){
  chars <- stringr::str_extract_all("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", ".")[[1]]
  title <- base36encode(lubridate::now())

  ending <- 1:36 %>%
    purrr::imap_chr(~{
      if(.y == 1) return("0")
      if(.y %in% c(8, 13, 18, 23)) return("_")
      if(.y %in% c(14)) return("4")
      return(sample(chars, 1))
    }) %>%
    paste(collapse = "")

  paste0("verify_", title, ending)
}

#' @export
base36encode <- function(number){
  alphabet <- stringr::str_extract_all('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ', ".")[[1]]

  output <- c()
  number <- round(as.numeric(number), 0)*1000

  if(number > 0 & number < length(alphabet)){
    output <- alphabet[i]
  }

  while(number != 0){
    i <- round(number, 0) %% 36
    number <- number %/% 36
    output <- c(alphabet[i], output)
  }

  return(paste0(output, collapse = ""))
}