logoutServer {shinyauthr}

logout server module

Description

Shiny authentication module for use with logoutUI

Usage

logoutServer(id, active, ...)

Arguments

id

An ID string that corresponds with the ID used to call the module's UI function

active

reactive supply the returned user_auth boolean reactive from loginServer here to hide/show the logout button

...

arguments passed to toggle

Details

This module uses shiny's new moduleServer method as opposed to the callModule method used by the now deprecated login function and must be called differently in your app. For details on how to migrate see the 'Migrating from callModule to moduleServer' section of Modularizing Shiny app code.

Value

Reactive boolean, to be supplied as the log_out argument of the loginServer module to trigger the logout process

Examples

library(shiny)

# dataframe that holds usernames, passwords and other user data
user_base <- dplyr::tibble(
  user = c("user1", "user2"),
  password = c("pass1", "pass2"),
  permissions = c("admin", "standard"),
  name = c("User One", "User Two")
)

ui <- fluidPage(
  # add logout button UI
  div(class = "pull-right", shinyauthr::logoutUI(id = "logout")),
  # add login panel UI function
  shinyauthr::loginUI(id = "login"),
  # setup table output to show user info after login
  tableOutput("user_table")
)

server <- function(input, output, session) {
  # call login module supplying data frame, 
  # user and password cols and reactive trigger
  credentials <- shinyauthr::loginServer(
    id = "login",
    data = user_base,
    user_col = user,
    pwd_col = password,
    log_out = reactive(logout_init())
  )
  
  # call the logout module with reactive trigger to hide/show
  logout_init <- shinyauthr::logoutServer(
    id = "logout",
    active = reactive(credentials()$user_auth)
  )
  
  output$user_table <- renderTable({
    # use req to only render results when credentials()$user_auth is TRUE
    req(credentials()$user_auth)
    credentials()$info
  })
}

if (interactive()) shinyApp(ui = ui, server = server)