#' Polügoni kopeerimine andmebaasi
#'
#' Funktsioon kopeerib sf polügooni postgis andmebaasi. Andmebaasi parameetri muutmiseks muuda konfiguratsiooni muutujat config <- ruut::get_config().
#' @param x	object of "qgis_result" spatial polygon.
#' @param conf	list database configuration. Default get_config()
#' @param id field andmebaasi unikaalne id veerg. Default 'fid'
#' @param crs_source CRS source CRS for example 'EPSG:3301' (Estonia). Default is 'EPSG:4326'.
#' @param crs_target CRS target CRS for example 'EPSG:4326'. Default is 'EPSG:4326'.
#' @keywords postgis, polygon
#' @export
#' @examples
#' ## Not run:
#' ##
#' ## copy_polygon_to_db()
#' ##
#' ## End(**Not run**)
copy_polygon_to_db <- function(x = NULL, conf = NULL, id = "fid",
                               crs_source = "EPSG:4326",
                               crs_target = "EPSG:4326") {
  if (!is.null(x) && class(x) == "qgis_result") {
    cmd <- sprintf(
      paste0(
        "ogr2ogr -progress --config PG_USE_COPY YES -f PostgreSQL ",
        "PG:\" dbname='%s' host=%s port=%d user='%s' password='%s' ",
        "sslmode=%s active_schema=%s \" -lco DIM=2 %s -overwrite -nlt POLYGON ",
        "-lco GEOMETRY_NAME=geometry -lco FID=%s -nln %s.%s ",
        "-s_srs %s -t_srs %s -nlt POLYGON"
      ),
      conf$dbname, conf$host, conf$port, conf$user, conf$password, conf$sslmode,
      conf$schema, x, id, conf$schema, conf$table, crs_source, crs_target
    )
    ruut::db_create_new_schema(conf)
    Sys.sleep(2)
    system(cmd)
  } else {
    NULL
  }
}