R/golem_utils_server.R

In SpeckledJim2/lucidum: A Shiny App to Build and Understand GBMs and GLMs

#' Show module with given name and icon
#'
#' @param output Shiny
#' @param name Module name
#' @param icon_name Module icon name
#' @param show_mod Boolean TRUE to show module
#'
#' @noRd
showModule <- function(output, name, icon_name, show_mod){
  output[[name]] <- renderMenu({
    if(show_mod){
      menuItem(name, tabName = name, icon = icon(icon_name))
    }
  })
}


#' Inverted versions of in, is.null and is.na
#'
#' @noRd
#'
#' @examples
#' 1 %not_in% 1:10
#' not_null(NULL)
`%not_in%` <- Negate(`%in%`)

not_null <- Negate(is.null)

not_na <- Negate(is.na)

#' Removes the null from a vector
#'
#' @noRd
#'
#' @example
#' drop_nulls(list(1, NULL, 2))
drop_nulls <- function(x) {
  x[!sapply(x, is.null)]
}

#' If x is `NULL`, return y, otherwise return x
#'
#' @param x,y Two elements to test, one potentially `NULL`
#'
#' @noRd
#'
#' @examples
#' NULL %||% 1
"%||%" <- function(x, y) {
  if (is.null(x)) {
    y
  } else {
    x
  }
}

#' If x is `NA`, return y, otherwise return x
#'
#' @param x,y Two elements to test, one potentially `NA`
#'
#' @noRd
#'
#' @examples
#' NA %|NA|% 1
"%|NA|%" <- function(x, y) {
  if (is.na(x)) {
    y
  } else {
    x
  }
}

#' Typing reactiveValues is too long
#'
#' @inheritParams reactiveValues
#' @inheritParams reactiveValuesToList
#'
#' @noRd
rv <- function(...) shiny::reactiveValues(...)
rvtl <- function(...) shiny::reactiveValuesToList(...)