## ----eval=FALSE---------------------------------------------------------------
#  # Helper functions
#  #
#  flatten_list_of_deps <- function(updated_data, data_deps) {
#    # Get higher deps fnc
#    get_higher_deps <- function(cur_dep, data_deps) {
#      sapply(seq_along(data_deps), function(x) {
#        if (any(cur_dep %in% data_deps[[x]])) {
#          names(data_deps)[x]
#        }
#      })
#    }
#  
#    # Get lower deps fnc
#    get_lower_deps <- function(cur_dep, data_deps) {
#      data_deps[sapply(cur_dep, function(x) which(x == names(data_deps)))]
#    }
#  
#    # Sort data_deps
#    sort_data_deps <- function(upd_data, data_deps) {
#      iup <- upd_data
#      for (ud in upd_data) {
#        up <- unlist(get_lower_deps(ud, data_deps))
#        if (any(up %in% upd_data)) {
#          iup <- unique(unlist(c(up[up %in% upd_data], iup)))
#        }
#      }
#      iup
#    }
#  
#    # Firstly, lets sort by dependencies the initial updated data
#    fin_up <- sort_data_deps(updated_data, data_deps)
#  
#    # Extracting higher dependencies for each value
#    cnt <- 1
#    while (cnt <= length(fin_up)) {
#      cur_deps <- unlist(
#        get_higher_deps(fin_up[cnt], data_deps)
#      )
#      if (!is.null(cur_deps)) {
#        cur_deps <- sort_data_deps(cur_deps, data_deps)
#        fin_up <- unique(c(fin_up[seq_len(cnt)], cur_deps, fin_up[-seq_len(cnt)]))
#      }
#      cnt <- cnt + 1
#    }
#  
#    fin_up
#  }

## ----eval=FALSE---------------------------------------------------------------
#  library(random.cdisc.data)
#  library(diffdf)
#  library(dplyr)
#  
#  # Call function to match random number generation from previous R versions
#  RNGkind(sample.kind = "Rounding")
#  
#  # Datasets must be listed after all of their dependencies
#  # e.g. adsl is a dependency for all other datasets so it is listed first.
#  
#  pkg_dir <- dirname(getwd())
#  # Listing source files and extraction of datasets' names
#  src_files <- list.files(paste0(pkg_dir, "/R"))
#  data_nms <- src_files[grepl("^ra*", src_files)] %>%
#    stringr::str_remove(pattern = "^r") %>%
#    stringr::str_remove(pattern = ".R$") %>%
#    sort()
#  # Exception handling
#  data_nms <- data_nms[data_nms != "adsaftte"] # Unbuilt for now
#  
#  # Construction of dependency tree based on formals
#  data_deps <- sapply(
#    data_nms,
#    function(x) {
#      dat_args <- names(formals(paste0("r", x)))
#      dat_args[dat_args %in% data_nms]
#    }
#  )
#  
#  git_call <- "git diff origin/main --name-only"
#  updated_files <- tryCatch(
#    system(git_call, intern = TRUE),
#    error = function(e) e
#  )
#  status_uf <- attr(updated_files, "status")
#  if (is(updated_files, "error") || (!is.null(status_uf) && status_uf == 1)) {
#    message("Found following error in git call: ", git_call)
#    message(e)
#    message(
#      "The calculation continues as default by recreating all datasets ",
#      "and updating the cached data if any change is found."
#    )
#    updated_data <- data_nms
#  } else {
#    updated_data <- updated_files[grepl("^R\\/", updated_files)] %>%
#      stringr::str_remove("^R\\/") %>%
#      stringr::str_remove(pattern = "^r") %>%
#      stringr::str_remove(pattern = ".R$")
#  }
#  
#  if (length(updated_data) != 0) {
#    stopifnot(all(updated_data %in% names(data_deps)))
#  
#    data_to_update <- flatten_list_of_deps(updated_data, data_deps)
#    default_args <- list(seed = 1, na_vars = list(), who_coding = TRUE, percent = 80, number = 2)
#  
#    # Generate and save updated cached datasets
#    for (dat in data_to_update) {
#      # Match arguments with defaults
#      dat_args <- default_args[names(default_args) %in% names(formals(paste0("r", dat)))]
#  
#      # Get the data deps cache that is already there (if adsl returns list())
#      dat_deps <- lapply(data_deps[[dat]], function(x) get(paste0("c", x)))
#  
#      # Main call to creation function
#      cdataset <- do.call(paste0("r", dat), c(dat_args, dat_deps))
#  
#      # Preview differences
#      cat("\nSaving cached data for dataset", paste0("*", dat, "*"), "with the following changes found (diffdf):\n")
#      diff_test <- diffdf(get(paste0("c", dat)), cdataset)
#      print(diff_test)
#  
#      # Check if there is any actual change to the data
#      if (length(diff_test) > 0) { # If no difference -> list()
#        # Save new cached dataset
#        assign(paste0("c", dat), cdataset)
#        fl_save <- paste0(dirname(getwd()), "/data/c", dat, ".RData")
#        attr(cdataset, "creation date") <- lubridate::date() # This should NOT be updated if no changes in diffdf
#        save(list = paste0("c", dat), file = fl_save, compress = "xz")
#        cat("Cached dataset updated for", paste0("*", dat, "*"), "in", paste0("data/", basename(fl_save), "."), "\n")
#      } else {
#        message("No update detected on the final data. No cached data was updated for *", dat, "*.")
#      }
#    }
#  } else {
#    message("No source files changed: no cached datasets currently require updates.")
#  }