R/loadSecrets.R

In gandiwan/datim-validation: External validation routines for data payloads in DATIM

#' @export
#' @importFrom utils URLencode
#' @title loadSecrets(secrets)

#' @description Load a DHIS secrets file which should be a JSON file as below
#' {
#' dhis": {
#'  "baseurl": "http://localhost:8080",
#'  "username": "admin",
#'  "password": "district"
#'  }
#' }
#'
#'
#' @param secrets Location of the secrets file
#' @return Returns a boolean value indicating that the secrets file is valid by accessing /api/me
#'
loadSecrets<-function(secrets=NA) {
  #Load from a file
  if (!is.na(secrets) ) {
  
    assertthat::assert_that(file.exists(secrets))
    s<-jsonlite::fromJSON(secrets) 
    } else {
    s<-list(dhis=list())
    s$dhis$username<-readline("Username: ")
    s$dhis$password<-getPass::getPass()
    s$dhis$baseurl<-readline("Server URL (ends with /): ")
}
  
  options("baseurl"= s$dhis$baseurl )
  options("secrets"=secrets)
  url<-URLencode( URL = paste0(getOption("baseurl"),"api/me") )
  #Logging in here will give us a cookie to reuse
  r<-httr::GET(url ,
               httr::authenticate(s$dhis$username,s$dhis$password),
               httr::timeout(60))
  assertthat::assert_that(r$status == 200L)
  r<- httr::content(r, "text")
  me<-jsonlite::fromJSON(r)
  options("organisationUnit" = me$organisationUnits$id)
  #Set the cache time out in days
  options("maxCacheAge" = 7)
  }