R/selectVar.R

In malcalakovalski/fim: Fiscal Impact Measure

find_vars <- function(data, filter) {
  stopifnot(is.data.frame(data))
  stopifnot(is.function(filter))
  names(data)[vapply(data, filter, logical(1))]
}

selectVarInput <- function(id) {
  selectInput(NS(id, "var"), "Variable", choices = NULL) 
}

selectVarServer <- function(id, data, filter = is.numeric) {
  moduleServer(id, function(input, output, session) {
    observeEvent(data(), {
      updateSelectInput(session, "var", choices = find_vars(data(), filter))
    })
    
    reactive(data()[[input$var]])
  })
}