#6 add, UT and document sftime_as_spatvector() function

NAMESPACE

@@ -56,6 +56,7 @@ export(modis_preprocess_vnp46)
 export(modis_warp_stars)
 export(modis_worker)
 export(read_commands)
+export(sftime_as_spatvector)
 export(test_download_functions)
 import(rvest)
 import(sf)

R/manipulate_spacetime_data.R

@@ -245,6 +245,21 @@ as_mysftime <- function(x, ...) {
   return(output)
 }
 
+#' Convert sftime object to SpatVector
+#'
+#' @param x a sftime
+#' @import sftime
+#' @author Eva Marques
+#' @export
+sftime_as_spatvector <- function(x) {
+  stopifnot("x is not a sftime" = class(x)[1] == "sftime")
+  timecol <- attributes(x)$time_column
+  tosf <- x[, !(colnames(x) %in% c(timecol))]
+  tosf[, timecol] <- as.data.table(x)[, get(timecol)]
+  return(terra::vect(tosf))
+}
+
+
 #' Convert a stdt to sf/sftime/SpatVector
 #' @param stdt A stdt object
 #' @param class_to character(1). Should be one of

tests/testthat/test-manipulate_spacetime_data.R

@@ -426,6 +426,22 @@ test_that("as_mysftime works as expected", {
                "x class not accepted")
 })
 
+test_that("sftime_as_spatvector as expected", {
+  # open testing data
+  stdata <- data.table::fread(paste0(testthat::test_path("..", "testdata/", ""),
+                                     "spacetime_table.csv"))
+  mysftime <- sftime::st_as_sftime(stdata,
+                                   coords = c("lon", "lat"),
+                                   time_column_name = "time",
+                                   crs = 4326)
+  expect_no_error(sftime_as_spatvector(mysftime))
+  # with a different time column name:
+  attributes(mysftime)$time_column <- "date"
+  mysftime <- dplyr::rename(mysftime, "date" = "time")
+  expect_no_error(sftime_as_spatvector(mysftime))
+  # doesn't work with other classes:
+  expect_error(sftime_as_spatvector(stdata))
+})
 
 test_that("dt_to_sf works as expected", {
   withr::local_package("terra")