compact.R

#' Generic function to compact a table (publication formatting)
#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#'
#' @author Dan Chaltiel
#' @export
ct_compact = function(data, ...){
  UseMethod("ct_compact")
}



#' @name ct_compact
#' @description NULL
#' @param data the object to compact
#' @param name_from name of the column to be collapsed when compacting
#' @param name_to name of the column that will receive the collapsed column. Will be created if it doesn't exist.
#' @param wrap_cols name of the columns to wrap
#' @param rtn_flextable whether to return a formatted [flextable()] object or a simple `data.frame`
#' @param ... additional arguments (not used)
#' @rdname ct_compact
#'
#' @author Dan Chaltiel
#' @export
#' @importFrom checkmate assert_scalar
#' @importFrom dplyr across any_of everything lag mutate row_number select sym
#' @importFrom flextable align bold border
#' @importFrom officer fp_border
#' @importFrom tidyr replace_na
#'
#' @return a compacted data.frame
#'
#' @examples
#' #dataframes
#' x=iris[c(1:5,51:55,101:105),]
#' ct_compact(x, name_from="Species")
#' ct_compact(x, name_from="Species", name_to="Petal.Length")
#' x$Species2 = substr(x$Species, 1, 1)
#' ct_compact(x, name_from="Species", wrap_cols="Species2")
ct_compact.data.frame = function(data, name_from, name_to="variable", wrap_cols=NULL, rtn_flextable=FALSE, ...){
  assert_scalar(name_from)
  assert_scalar(name_to)
  id = (data[[name_from]]!=lag(data[[name_from]])) %>% replace_na(TRUE)

  nf = sym(name_from)
  nt = sym(name_to)
  x = sort(c(seq(nrow(data)), which(id))) #duplicate rows
  if(is.null(data[[name_to]])) data[[name_to]] = ""
  rtn = data[x,] %>%
    mutate(
      across(everything(), as.character),
      gp = row_number()==1 | !!nf!=lag(!!nf),
      !!nt:=ifelse(.data$gp, !!nf, !!nt),
      across(any_of(wrap_cols), ~ifelse(.data$gp, .x, "")),
      across(-any_of(c(name_to, wrap_cols)), ~ifelse(.data$gp, "", .x)),
    ) %>%
    select(any_of(name_to), everything(), -any_of(name_from), -"gp")
  rownames(rtn) = NULL #resets row numbers

  if(rtn_flextable){
    id2 = which(id)+(0:(sum(id)-1))
    rtn = rtn %>% flextable %>% border(id2, border.top = fp_border()) %>%
      bold(id2) %>% align(id2, align="left")
  }

  attr(rtn, "title_rows") = id
  rtn
}



#' @description NULL
#' @rdname ct_compact
#'
#' @param keep_id `glue` pattern to keep the column name along with the label. If `TRUE`, default to `"{label} ({.id})"`.
#'
#' @author Dan Chaltiel
#' @export
#' @importFrom dplyr any_of intersect mutate select
#' @importFrom glue glue
#'
#' @examples
#'
#' #crosstables
#' x=crosstable(mtcars2, c(disp,hp,am), by=vs, test=TRUE, effect=TRUE)
#' ct_compact(x)
#' ct_compact(x, name_from=".id")
ct_compact.crosstable = function(data, name_from=c("label", ".id"), name_to="variable", keep_id=FALSE, ...){
  by_levels = attr(data, "by_levels")
  by = attr(data, "by")
  name_from = match.arg(name_from)
  wrap_cols = intersect(names(data), c("test", "effect"))
  if(name_from=="label") rcol=".id" else rcol="label"
  if(!isFALSE(keep_id)) {
    if(isTRUE(keep_id)) keep_id = "{label} ({.id})"
    data = data %>% mutate(label = glue(keep_id))
  }

  rtn = data %>%
    select(-any_of(rcol)) %>%
    ct_compact.data.frame(name_from=name_from, name_to=name_to,
                          wrap_cols=wrap_cols, rtn_flextable=FALSE)

  new_attr_names = setdiff(names(attributes(data)), names(attributes(rtn)))
  attributes(rtn) = c(attributes(rtn), attributes(data)[new_attr_names])
  class(rtn) = c("crosstable", "compacted_crosstable", "data.frame")
  rtn
}



#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#' @export
#' @importFrom cli cli_abort
ct_compact.default = function(data, ...) {
  cli_abort("{.fun ct_compact} is not defined for object of class {.cls {class(data)}}",
            class="ct_compact_notfound_error")
}




# Deprecated --------------------------------------------------------------


#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#' @export
compact = function(data, ...){
  UseMethod("compact")
}

#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#' @export
#' @importFrom lifecycle deprecate_warn
compact.data.frame = function(data, ...){
  deprecate_warn("0.5.0", "compact.data.frame()", "ct_compact.data.frame()", details="Or use purrr::compact()")
  ct_compact.data.frame(data, ...)
}

#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#' @export
#' @importFrom lifecycle deprecate_warn
compact.crosstable = function(data, ...){
  deprecate_warn("0.5.0", "compact.crosstable()", "ct_compact.crosstable()")
  ct_compact.crosstable(data, ...)
}

#' @description NULL
#' @rdname ct_compact
#' @usage NULL
#' @export
#' @importFrom cli cli_abort
compact.default = function(data, ...) {
  fn=get_defined_function('compact')
  if(is.null(fn) || is.null(fn[[1L]]))
    cli_abort('could not find function "compact" for objects of class other than `crosstable` or `dataframe`',
              class="compact_notfound_error")
  fn[[1L]](data, ...)
}