R/read-write.R

In measr: Bayesian Psychometric Measurement Using 'Stan'

write_measrfit <- function(model, file) {
  file_path <- fs::path_dir(fs::path_abs(file))
  file_name <- fs::path_file(fs::path_abs(file))

  if (S7::S7_inherits(model@backend, cmdstanr)) {
    cur_files <- model@model$output_files()
    new_files <- paste0(
      file_path,
      "/",
      fs::path_ext_remove(file_name),
      "-",
      seq_along(cur_files),
      ".csv"
    )

    if (!identical(cur_files, new_files)) {
      model@model$save_output_files(
        dir = file_path,
        basename = fs::path_ext_remove(file_name),
        timestamp = FALSE,
        random = FALSE
      )
    }
  }
  saveRDS(
    model,
    file = fs::path_ext_set(fs::path(file_path, file_name), ".rds")
  )
}

read_measrfit <- function(file) {
  file <- check_file(file)
  mod <- readRDS(file)

  mod
}

check_previous_fit <- function(
  file,
  dcm_spec,
  clean_data,
  stan_mthd,
  stan_bknd
) {
  prev <- read_measrfit(file)

  check <- all(
    identical(prev@model_spec@qmatrix, dcm_spec@qmatrix),
    S7::S7_inherits(
      dcm_spec@measurement_model,
      S7::S7_class(prev@model_spec@measurement_model)
    ),
    S7::S7_inherits(
      dcm_spec@structural_model,
      S7::S7_class(prev@model_spec@structural_model)
    ),
    identical(
      dcmstan::prior_tibble(prev@model_spec@priors),
      dcmstan::prior_tibble(dcm_spec@priors)
    ),
    identical(prev@data, clean_data),
    S7::S7_inherits(stan_mthd, S7::S7_class(prev@method)),
    S7::S7_inherits(stan_bknd, S7::S7_class(prev@backend))
  )

  if (check) {
    return(prev)
  } else {
    return(NULL)
  }
}