diff --git a/R/ds2ical.R b/R/ds2ical.R
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+++ b/R/ds2ical.R
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+utils::globalVariables(c("DTSTART"))
+
+#' Convert data set to ical file
+#'
+#' @param data data set
+#' @param start event start column
+#' @param location event location column
+#' @param event.length use lubridate functions to generate "Period" class
+#' element (default is lubridate::hours(2))
+#' @param summary.glue.string character string to pass to glue::glue() for event
+#' name (summary). Can take any column from data set.
+#' @param description.glue.string character string to pass to glue::glue() for
+#' event description. Can take any column from data set.
+#'
+#' @return tibble of class "ical"
+#' @export
+#'
+#' @examples
+#' df <- dplyr::tibble(start = c(Sys.time(), Sys.time() + lubridate::days(2)),
+#' id = c("1", 3), assessor = "A", location = "111", note = c(NA, "OBS"))
+#' df |> ds2ical(start, location)
+#' df |> ds2ical(start, location,
+#' summary.glue.string = "ID {id} [{assessor}] {note}")
+#' # Export .ics file: (not run)
+#' ical <- df |> ds2ical(start, location, description.glue.string = "{note}")
+#' # ical |> calendar::ic_write(file=here::here("calendar.ics"))
+ds2ical <- function(data,
+                   start,
+                   location,
+                   summary.glue.string = "ID {id} [{assessor}]",
+                   description.glue.string = NULL,
+                   event.length = lubridate::hours(2)) {
+  ds <- data |>
+    dplyr::transmute(
+      SUMMARY = glue::glue(summary.glue.string, .na = ""),
+      DTSTART = lubridate::ymd_hms({{ start }}, tz = "CET"),
+      DTEND = DTSTART + event.length,
+      LOCATION = {{ location }}
+    )
+
+  if (!is.null(description.glue.string)){
+    ds <- dplyr::tibble(ds,
+                        dplyr::transmute(data,
+                                         DESCRIPTION = glue::glue(
+                                           description.glue.string,
+                                           .na = ""
+                                           )
+                                         )
+                        )
+  }
+
+  ds |>
+    (\(x){
+      x |>
+        dplyr::mutate(UID = replicate(nrow(x), calendar::ic_guid()))
+    })() |>
+    dplyr::filter(!is.na(DTSTART)) |>
+    calendar::ical()
+}
diff --git a/man/ds2ical.Rd b/man/ds2ical.Rd
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index 0000000..7c0719c
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+++ b/man/ds2ical.Rd
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+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/ds2ical.R
+\name{ds2ical}
+\alias{ds2ical}
+\title{Convert data set to ical file}
+\usage{
+ds2ical(
+  data,
+  start,
+  location,
+  summary.glue.string = "ID {id} [{assessor}]",
+  description.glue.string = NULL,
+  event.length = lubridate::hours(2)
+)
+}
+\arguments{
+\item{data}{data set}
+
+\item{start}{event start column}
+
+\item{location}{event location column}
+
+\item{summary.glue.string}{character string to pass to glue::glue() for event
+name (summary). Can take any column from data set.}
+
+\item{description.glue.string}{character string to pass to glue::glue() for
+event description. Can take any column from data set.}
+
+\item{event.length}{use lubridate functions to generate "Period" class
+element (default is lubridate::hours(2))}
+}
+\value{
+tibble of class "ical"
+}
+\description{
+Convert data set to ical file
+}
+\examples{
+df <- dplyr::tibble(start = c(Sys.time(), Sys.time() + lubridate::days(2)),
+id = c("1", 3), assessor = "A", location = "111", note = c(NA, "OBS"))
+df |> ds2ical(start, location)
+df |> ds2ical(start, location,
+summary.glue.string = "ID {id} [{assessor}] {note}")
+# Export .ics file: (not run)
+ical <- df |> ds2ical(start, location, description.glue.string = "{note}")
+# ical |> calendar::ic_write(file=here::here("calendar.ics"))
+}