get_ed_heroin.r

get_ed_heroin <- function(username, password, site_no, user_id, version = 4,start_date, end_date, ...) {
  
  # optional quoted selected fields 
  
  require(httr, quietly = T)
  require(glue, quietly = T)
  require(purrr, quietly = T)
  
  version <- as.character(version)
  start_date = gsub("^0", "", format(as.Date(start_date) , "%d%b%Y"))
  end_date = gsub("^0", "", format(as.Date(end_date) , "%d%b%Y"))
  
  url <- glue::glue("https://essence.syndromicsurveillance.org/nssp_essence/api/dataDetails/csv?endDate={end_date}&ccddCategory=cdc%20heroin%20overdose%20v{version}&percentParam=noPercent&geographySystem=hospital&datasource=va_hosp&detector=nodetectordetector&startDate={start_date}&ageNCHS=unknown&ageNCHS=00-10&ageNCHS=11-14&ageNCHS=15-24&ageNCHS=25-34&ageNCHS=35-44&ageNCHS=45-54&ageNCHS=55-64&ageNCHS=65-74&ageNCHS=75-84&ageNCHS=85-1000&timeResolution=daily&hasBeenE=1&medicalGroupingSystem=essencesyndromes&userId={user_id}&site={site_no}&hospFacilityType=emergency%20care&aqtTarget=DataDetails&refValues=true")
  
  ## select fields
  
  f_field <- function(url, ...){
    
    if(!length(list(...))){
      field <- NULL
    } 
    else { 
      field <- paste(paste0("&field=",list(...)), collapse="")   
    }
    
    paste0(url, field)
  }
  
  url <- f_field(url = url, ...)
  
  api_resp <- GET(url, authenticate(user = username, password = password))
  
  content(api_resp, type = "text/csv")
  
}