Function to initialise google analytics html script

.gitignore

@@ -2,6 +2,7 @@
 .Rhistory
 .RData
 .Ruserdata
+./google-analytics.html
 docs
 inst/doc
 www/

DESCRIPTION

@@ -11,6 +11,7 @@ Description: R package containing preferred methods for creating official
     DfE R-Shiny dashboards.
 License: GPL (>= 3)
 Imports: 
+    magrittr,
     checkmate,
     glue,
     htmltools,

NAMESPACE

@@ -6,8 +6,10 @@ export(cookies_panel_server)
 export(cookies_panel_ui)
 export(custom_disconnect_message)
 export(dfe_cookie_script)
+export(init_analytics)
 export(init_cookies)
 export(support_panel)
 export(tidy_code)
 importFrom(htmltools,tagList)
 importFrom(htmltools,tags)
+importFrom(magrittr,"%>%")

R/analytics.R

@@ -0,0 +1,72 @@
+#' init_analytics
+#' @description
+#' Creates the google-analytics.html script in order to allow the activation of
+#' analytics via GA4. For the full steps required to set up analytics, please
+#' refer to the documentation in the readme.
+#'
+#' @param ga_code The Google Analytics code
+#' @importFrom magrittr %>%
+#' @return TRUE if written, FALSE if not
+#' @export
+#'
+#' @examples init_analytics(ga_code = "0123456789")
+init_analytics <- function(ga_code) {
+  is_valid_ga4_code <- function(ga_code) {
+    stringr::str_length(ga_code) == 10 & typeof(ga_code) == "character"
+  }
+
+  if (is_valid_ga4_code(ga_code) == FALSE) {
+    stop(
+      'You have entered an invalid GA4 code in the ga_code argument.
+      Please enter a 10 digit code as a character string.
+      e.g. "0123QWERTY"'
+    )
+  }
+
+  github_area <- "https://raw.githubusercontent.com/dfe-analytical-services/"
+  webpage <- RCurl::getURL(
+    paste0(
+      github_area,
+      "dfeshiny/main/inst/google-analytics.html"
+    )
+  )
+  tryCatch(
+    html_script <- gsub(
+      "XXXXXXXXXX",
+      ga_code,
+      readLines(tc <- textConnection(webpage))
+    ),
+    error = function(e) {
+      return("Download failed")
+    },
+    message("Downloaded analytics template script")
+  )
+
+  close(tc)
+  if (file.exists("google-analytics.html")) {
+    message("Analytics file already exists.")
+    message("If you have any customisations in that file, make sure you've
+    backed those up before over-writing.")
+    user_input <- readline(
+      prompt = "Are you happy to overwrite the existing analytics script (y/N) "
+      ) |>
+      stringr::str_trim()
+    if (user_input %in% c("y", "Y")) {
+      write_out <- TRUE
+    } else {
+      write_out <- FALSE
+    }
+  } else {
+    write_out <- TRUE
+  }
+  if (write_out) {
+    cat(html_script, file = "google-analytics.html", sep = "\n")
+    message("")
+    message("Google analytics script created in google-analytics.html.")
+    message("You'll need to add the following line to your ui.R script to start
+            recording analytics:")
+    message('tags$head(includeHTML(("google-analytics.html"))),')
+  } else {
+    message("Original Google analytics html script left in place.")
+  }
+}