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#'Convert seasonal to decadal data to a 's2dv_cube' class
#'
#'@description This function allows to convert data to 's2dv_cube' class if the data hasn't been loaded using CST_Load or has been transformed with other methods. A 's2dv_cube' object has many different components including metadata. This function will allow to create partial 's2dv_cube' objects and for each expected missed parameter a warning message will be displayed.
#'
#'@author Perez-Zanon Nuria, \email{nuria.perez@bsc.es}
#'
#'@param data an array with any number of named dimensions, tipically and object output from CST_Load,with the following dimensions: dataset, member, sdate, ftime, lat and lon.
#'@param lon an array with one dimension containing the longitudes and attributes: dim, cdo_grid_name, data_across_gw, array_across_gw, first_lon, last_lon and projection.
#'@param lat an array with one dimension containing the longitudes and attributes: dim, cdo_grid_name, first_lat, last_lat and projection.
#'@param Variable a list of two elements: \code{varName} a character string indicating the abbreviation of a variable name and \code{level} a character string indicating the level, if it is not required it could be set as NULL.
#'@param Datasets a named list with the dataset model with two elements: \code{InitiatlizationDates}, containing a list of the start dates for each member named with the names of each member, and \code{Members} containing a vertor with the member names (i.e.: "Member_1")
#'@param Dates a named list of two elements: \code{start}, an array of dimensions (sdate, time) with the POSIX initial date of each forecast time of each starting date, and \code{end}, an array of dimensions (sdate, time) with the POSIX final date of each forecast time of each starting date.
#'@param when a time stamp of the date the Load() call to obtain the data was issued.
#'@param source_files a vector of character strings with complete paths to all the found files involved in the Load() call.
#'
#'@return a object of class 's2dv_cube'.
#'
#'@seealso \code{\link[s2dverification]{Load}} and \code{\link{CST_Load}}
#'@examples
#'exp <- 1:100
#'dim(exp) <- c(lat = 2, time = 10, lon = 5)
#'exp <- as.s2dv_cube(data = exp)
#'class(exp)
#'@export
as.s2dv_cube <- function(data, lon = NULL, lat = NULL, Variable = NULL, Datasets = NULL,
Dates = NULL, when = NULL, source_files = NULL) {
if (is.null(data) | !is.array(data) | is.null(names(dim(data)))) {
stop("Parameter 'data' must be an array with named dimensions.")
}
dims <- dim(data)
if (is.null(lon)) {
if (!any(c('lon', 'longitude') %in% names(dims))) {
warning("Parameter 'lon' is not provided but data contains a ",
"longitudinal dimension.")
} else {
warning("Parameter 'lon' is not provided so the data is from a ",
"unknown location.")
}
}
if (is.null(lat)) {
if (!any(c('lat', 'latitude') %in% names(dims))) {
warning("Parameter 'lat' is not provided but data contains a ",
"latitudinal dimension.")
} else {
warning("Parameter 'lat' is not provided so the data is from a ",
"unknown location.")
}
}
if (is.null(Variable)) {
warning("Parameter 'Variable' is not provided so the metadata",
"of 's2dv_cube' object will be incomplete.")
}
if (is.null(Datasets)) {
warning("Parameter 'Datasets' is not provided so the metadata",
"of 's2dv_cube' object will be incomplete.")
}
if (is.null(Dates)) {
if (!any(c('time', 'ftime', 'sdate') %in% names(dims))) {
warning("Parameter 'Dates' is not provided but data contains a ",
"temporal dimension.")
} else {
warning("Parameter 'Dates' is not provided so the data is from a ",
"unknown time period.")
}
}
if (is.null(when)) {
warning("Parameter 'when' is not provided so the metadata",
"of 's2dv_cube' object will be incomplete.")
}
if (is.null(source_files)) {
warning("Parameter 'source_files' is not provided so the metadata",
"of 's2dv_cube' object will be incomplete.")
}
if (!is.null(Variable)) {
if (!is.list(Variable)) {
Variable <- list(Variable)
}
if (names(Variable)[1] != 'VarName' | names(Variable)[2] != 'level') {
warning("The name of the first elment of parameter 'Variable' is ",
"expected to be 'varName' and the second 'level'.")
}
if (!is.character(Variable[[1]])) {
warning("The element 'Varname' of parameter 'Variable' must be ",
"a character.")
}
}
# Dimensions comparison
if (!is.null(lon)) {
if (any(names(dims) %in% c('lon', 'longitude'))) {
if (dims[(names(dims) %in% c('lon', 'longitude'))] != length(lon) &
dims[(names(dims) %in% c('lon', 'longitude'))] != 1) {
stop("Length of parameter 'lon' doesn't match the length of ",
"longitudinal dimension in parameter 'data'.")
}
}
}
if (!is.null(lat)) {
if (any(names(dims) %in% c('lat', 'latitude'))) {
if (dims[(names(dims) %in% c('lat', 'latitude'))] != length(lon) &
dims[(names(dims) %in% c('lat', 'longitude'))] != 1) {
stop("Length of parameter 'lat' doesn't match the length of ",
"latitudinal dimension in parameter 'data'.")
}
}
}
if (!is.null(Dates)) {
if (!is.list(Dates)) {
stop("Paramter 'Dates' must be a list.")
} else {
if (length(Dates) > 2) {
warning("Parameter 'Dates' is a list with more than 2 ",
"elements and only the first two will be used.")
Dates <- Dates[1 : 2]
}
if (names(Dates)[1] != 'start' | names(Dates)[2] != 'end') {
warning("The name of the first element of parameter 'Dates' ",
"is expected to be 'start' and the second 'end'.")
}
if (length(Dates[[1]]) != length(Dates[[2]]) &
length(Dates) == 2) {
stop("The length of the element in parameter 'Dates' must ",
"be equal.")
}
time_dims <- dims[names(dims) %in% c('sdate', 'time', 'ftime')]
if (prod(time_dims) != length(Dates[[1]])) {
stop("The length of the temporal dimension doesn't match ",
" with the length of elements in parameter 'Dates'.")
}
}
}
object <- list(data = data, lon = lon, lat = lat, Variable = Variable,
Datasets = Datasets, Dates = Dates, when = when,
source_files = source_files)
class(object) <- 's2dv_cube'
return(object)
}