sdd_info() function and addin

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: BioDataScience
 Type: Package
-Version: 2021.0.0
+Version: 2021.1.0
 Title: Configuration for Biological Data Science Course
 Description: User sign in and sign out for the Biological Data Science courses
   at the University of Mons, Belgium.

NAMESPACE

@@ -2,5 +2,6 @@
 
 export(config)
 export(obfuscator)
+export(sdd_info)
 export(sign_in)
 export(sign_out)

NEWS.md

@@ -1,3 +1,7 @@
+# BioDataScience 2021.1.0
+
+- `sdd_info()` function and corresponfing RStudio addin are introduced for easily sharing small pieces of text in a central repository.
+
 # BioDataScience 2021.0.0
 
 -   Dependency moved from {learndown} to {learnitdown}. Preparation of series 2021-2022.

R/addins.R

@@ -1,4 +1,7 @@
 # RStudio addins
 
+sdd_info_addin <- function()
+  sdd_info()
+
 sign_out_addin <- function()
-  sign_out()
+  sign_out()

R/sdd_info.R

@@ -0,0 +1,31 @@
+#' Get centralized information for the BioDataScience course
+#'
+#' Use this function to get small peices of text from a centralized repository.
+#' This is a convenience function to retrieve, say, links, pieces of R code, or
+#' other textual information in relation with the current BioDataScience course.
+#' To be used only by students currently involved in a course.
+#'
+#' @param echo Is the textual information echoed in the console (`TRUE` by default).
+#' @param skipNul Do we skip nul characters in the text (`TRUE`  by default)?
+#'
+#' @return The downloaded text is returned invisibly.
+#' @export
+#'
+#' @examples
+#' # If there is some textual information currently available in the central
+#' # repository, you get it and dispaly it this way:
+#' sdd_info()
+#'
+#' # To place this text in a variable silently, do this:
+#' txt <- sdd_info(echo = FALSE)
+#' txt
+sdd_info <- function(echo = TRUE, skipNul = TRUE) {
+  sdd_url <- url("https://go.sciviews.org/sdd_info")
+  open(sdd_url)
+  on.exit(try(close(sdd_url), silent = TRUE))
+  sdd_data <- readLines(sdd_url, encoding = "UTF-8", warn = FALSE,
+    skipNul = skipNul)
+  if (isTRUE(echo))
+    cat(sdd_data, sep = "\n")
+  invisible(sdd_data)
+}

inst/rstudio/addins.dcf

@@ -1,3 +1,8 @@
+Name: SDD info
+Description: Get current SDD information
+Binding: sdd_info_addin
+Interactive: false
+
 Name: Sign out
 Description: Sign out current user
 Binding: sign_out_addin