使用 shiny.router 时 R shiny 中的模块之间的通信

Question

My shiny app is set up so that each page is a separate module that is called by a router when needed. Two of these modules/pages need to communicate between each other so that when users input their username and password on one page, it also fills in on the other page. (Preferably this would be two way but honestly at this point I'll take anything)

Here's a simplified version of the code I am using.

#global

headerLinks <<- list(
  #"splash" = "splash",
  "Summary of Recording" = "summary",
  "Indicator Detail" = "detail"
)

routes <- c(
  route("home", pageSplashUI("splash")),
  route("summary", pageSummaryUI("summary")),
  route("detail", pageDetailUI("detail"))
)

router <- make_router(
  routes
)

shinyUI(
  tagList(
    shinyjs::useShinyjs(),
    tags$head(
      tags$link(rel = "stylesheet", type = "text/css", href = "css/custom.css")
    ),
    
    router$ui,
    tags$script(src="js/util.js")
  )
)

  shinyServer(function(input, output, session) {
  
  moduleControl <- reactiveValues(
    currentPage=NULL,
    moduleMsg=NULL
  )
  
  
  moduleControl$currentPage <- eventReactive(get_page(), {
    get_page()  
  })
  
  pass <- callModule(pageSummary, "summary", "summary", moduleControl)
  callModule(pageDetail, "detail", "detail", moduleControl, pass)
  
  modules <- list(callModule(pageSplash, "home", "splash", moduleControl),
                  callModule(pageDetail, "detail", "detail", moduleControl, pass),
                  callModule(pageSummary, "summary", "summary", moduleControl))
  
  router$server(input,output,session)
})

pageSummaryUI <- function(id) {
  ns <- NS(id)
  
  createFlexSidebarPage(ns("summary"),
                        createFilterGroup(ns("filters"),
                                          createFilterPanel(ns("DetailUP"),
                                                            "Enter Username and Password",
                                                            textInput(ns("Username"),"Username:"),
                                                            textInput(ns("Password"),"Password:"),
                                                            actionButton(ns("Submit"),"Submit", icon("paper-plane"), 
                                                                         style="color: #fff; background-color: #23356a; border-color: #fff")),
                                          
                                          createFilterPanel(ns("Filters"),
                                                            "Filters",
                                                            selectInput(ns("Ethnicity"), "Ethnicity",
                                                                        choices=unique(data$Prioritised.Ethnicities), selected = "All ethnicities"),
                                                            selectInput(ns("Age"), "Age",
                                                                        choices=unique(data$agegroup), selected = "All ages"),
                                                            selectInput(ns("Year"), "Year",
                                                                        choices=unique(data$year), selected = "All years")
                                          )
                        
                        ),
                        "Summary of Recording",
                        T
  )
}

pageSummary <- function(input, output, session, name, moduleControl) {
  ns <- session$ns
  
  observeEvent(input[["route_summary"]], {
    change_page("summary", session = session)
  })
  
  ### ---- username and password reactivity
  
  passvals <- reactiveValues()
  observe({passvals$pass1 <- input$Password})
  observe({passvals$user1 <- input$Username})
  
  return(passvals)

}

pageDetailUI <- function(id) {
  ns <- NS(id)
  
  createFlexSidebarPage(ns("detail"),
                        createFilterGroup(ns("filters"),
                                         createFilterPanel(ns("DetailUP"),
                                                            "Enter Username and Password",
                                                            textInput(ns("Username"),"Username:"),
                                                                      textInput(ns("Password"),"Password:"),
                                                                      actionButton(ns("Submit"),"Submit", icon("paper-plane"), 
                                                                                   style="color: #fff; background-color: #23356a; border-color: #fff")),
                                          createFilterPanel(ns("Filters"),
                                                            "Filters",
                                                            selectInput(ns("Indicator"), "Indicator",
                                                                        choices=unique(dfFinal_G24$Indicator)),
                                                            selectInput(ns("Ethnicity"), "Ethnicity",
                                                                        choices=unique(dfFinal_G24$Prioritised.Ethnicities), selected = "All ethnicities"),
                                                            selectInput(ns("Age"), "Age",
                                                                        choices=unique(dfFinal_G24$agegroup), selected = "All ages"),
                                                            selectInput(ns("Year"), "Year",
                                                                        choices=unique(dfFinal_G24$year), selected = "All years")
                                          )
                        
                        ),
                        "Indicator Detail",
                        T
  )
}

pageDetail <- function(input, output, session, name, moduleControl, pass) {
  ns <- session$ns
  
  observeEvent(input[["route_detail"]], {
    change_page("detail", session = session)
  })
  
  ### ---- username and password reactivity
  
  reactive({
    updateTextInput(pageSummary, "Password", value = pass$pass1)
    })

  
}

Does anyone know how to make this work?

Answer 1

1. Call the module for the page you are switching to in your server and store the session.
2. Use that session in the updateTextInput call.