googleAuthR (version 0.1.0)

renderLogin: Render a Google API Authentication Login/logout button

Description

Use within a Shiny server.R to assign to an output for ui.R. The login button carries an ActionLink with value "signed_in".

Usage

renderLogin(session, access_token, login_text = "Login via Google",
  logout_text = "Logout", login_class = "btn btn-primary",
  logout_class = "btn btn-default")

Arguments

session

A Shiny session object

access_token

A token generated by reactiveAccessToken

login_text

What the login text will read on the button

logout_text

What the logout text will read on the button

login_class

The Bootstrap class for the login link

logout_class

The Bootstrap class for the logout link

Value

• An object to assign to output e.g. output$login

See Also

Other shiny auth functions: authReturnCode; createCode; gar_shiny_getAuthUrl; gar_shiny_getToken; gar_shiny_getUrl; loginOutput; reactiveAccessToken; with_shiny

Examples

## in global.R

## create the API call function, example with goo.gl URL shortner
library(googleAuthR)
options("googleAuthR.scopes.selected" = c("https://www.googleapis.com/auth/urlshortener"))

shorten_url <- function(url){

  body = list(
    longUrl = url
 )

 f <- gar_api_generator("https://www.googleapis.com/urlshortener/v1/url",
                        "POST",
                        data_parse_function = function(x) x$id)

 f(the_body = body)

 }


## in server.R
library(shiny)
library(googleAuthR)
source('global.R')

shinyServer(function(input, output, session)){

  ## Get auth code from return URL
  access_token  <- reactiveAccessToken(session)

  ## Make a loginButton to display using loginOutput
  output$loginButton <- renderLogin(session, access_token())

  short_url_output <- eventReactive(input$submit, {
  ## wrap existing function with_shiny
  ## pass the reactive token in shiny_access_token
  ## pass other named arguments
    short_url <- with_shiny(f = shorten_url,
                           shiny_access_token = access_token(),
                           url=input$url)

   })

   output$short_url <- renderText({

     short_url_output()

   })
 }

## in ui.R
library(shiny)
library(googleAuthR)

shinyUI(
  fluidPage(
    loginOutput("loginButton"),
    textInput("url", "Enter URL"),
    actionButton("submit", "Shorten URL"),
    textOutput("short_url")
    ))