introduce decorators for tm_t_abnormality_by_worst_grade (#1260)

Part of insightsengineering/teal#1371

<details><summary> Working Example </summary>

```r
devtools::load_all("../teal")
devtools::load_all(".")

insert_rrow_decorator <- function(default_caption = "I am a good new row", .var_to_replace = "table") {
  teal_transform_module(
    label = "New row",
    ui = function(id) shiny::textInput(shiny::NS(id, "new_row"), "New row", value = default_caption),
    server = make_teal_transform_server(
      substitute({
        .var_to_replace <- rtables::insert_rrow(.var_to_replace, rtables::rrow(new_row))
      }, env = list(.var_to_replace = as.name(.var_to_replace)))
    )
  )
}


library(dplyr)

data <- teal_data()
data <- within(data, {
  ADSL <- tmc_ex_adsl
  ADLB <- tmc_ex_adlb %>%
    filter(!AVISIT %in% c("SCREENING", "BASELINE"))
})
join_keys(data) <- default_cdisc_join_keys[names(data)]

ADSL <- data[["ADSL"]]
ADLB <- data[["ADLB"]]

app <- init(
  data = data,
  modules = modules(
    tm_t_abnormality_by_worst_grade(
      label = "Laboratory Test Results with Highest Grade Post-Baseline",
      dataname = "ADLB",
      arm_var = choices_selected(
        choices = variable_choices(ADSL, subset = c("ARM", "ARMCD")),
        selected = "ARM"
      ),
      paramcd = choices_selected(
        choices = value_choices(ADLB, "PARAMCD", "PARAM"),
        selected = c("ALT", "CRP", "IGA")
      ),
      add_total = FALSE,
      decorators = list(insert_rrow_decorator("I am a good new row"))
    )
  ),
  filter = teal_slices(
    teal_slice("ADSL", "SAFFL", selected = "Y"),
    teal_slice("ADLB", "ONTRTFL", selected = "Y")
  )
)
if (interactive()) {
  shinyApp(app$ui, app$server)
}

```

</details>

---------

Co-authored-by: Lluís Revilla <[email protected]>

R/tm_t_abnormality_by_worst_grade.R

@@ -221,8 +221,7 @@ template_abnormality_by_worst_grade <- function(parentname, # nolint: object_len
 
   y$table <- substitute(
     expr = {
-      result <- rtables::build_table(lyt = lyt, df = anl, alt_counts_df = parent)
-      result
+      table <- rtables::build_table(lyt = lyt, df = anl, alt_counts_df = parent)
     },
     env = list(parent = as.name(parentname))
   )
@@ -249,6 +248,14 @@ template_abnormality_by_worst_grade <- function(parentname, # nolint: object_len
 #'
 #' @inherit module_arguments return seealso
 #'
+#' @section Decorating `tm_t_abnormality_by_worst_grade`:
+#'
+#' This module generates the following objects, which can be modified in place using decorators:
+#' - `table` (`ElementaryTable` - output of `rtables::build_table`)
+#'
+#' For additional details and examples of decorators, refer to the vignette
+#' `vignette("decorate-modules-output", package = "teal")` or the [`teal_transform_module()`] documentation.
+#'
 #' @export
 #'
 #' @examplesShinylive
@@ -339,7 +346,8 @@ tm_t_abnormality_by_worst_grade <- function(label, # nolint: object_length.
                                             drop_arm_levels = TRUE,
                                             pre_output = NULL,
                                             post_output = NULL,
-                                            basic_table_args = teal.widgets::basic_table_args()) {
+                                            basic_table_args = teal.widgets::basic_table_args(),
+                                            decorators = NULL) {
   message("Initializing tm_t_abnormality_by_worst_grade")
   checkmate::assert_string(label)
   checkmate::assert_string(dataname)
@@ -355,6 +363,8 @@ tm_t_abnormality_by_worst_grade <- function(label, # nolint: object_length.
   checkmate::assert_class(pre_output, classes = "shiny.tag", null.ok = TRUE)
   checkmate::assert_class(post_output, classes = "shiny.tag", null.ok = TRUE)
   checkmate::assert_class(basic_table_args, "basic_table_args")
+  decorators <- normalize_decorators(decorators)
+  assert_decorators(decorators, null.ok = TRUE, "table")
 
   data_extract_list <- list(
     arm_var = cs_to_des_select(arm_var, dataname = parentname),
@@ -380,7 +390,8 @@ tm_t_abnormality_by_worst_grade <- function(label, # nolint: object_length.
         label = label,
         worst_flag_indicator = worst_flag_indicator,
         total_label = total_label,
-        basic_table_args = basic_table_args
+        basic_table_args = basic_table_args,
+        decorators = decorators
       )
     ),
     datanames = teal.transform::get_extract_datanames(data_extract_list)
@@ -452,6 +463,7 @@ ui_t_abnormality_by_worst_grade <- function(id, ...) { # nolint: object_length.
         data_extract_spec = a$worst_high_flag_var,
         is_single_dataset = is_single_dataset_value
       ),
+      ui_decorate_teal_data(ns("decorator"), decorators = select_decorators(a$decorators, "table")),
       teal.widgets::panel_group(
         teal.widgets::panel_item(
           "Additional table settings",
@@ -501,7 +513,8 @@ srv_t_abnormality_by_worst_grade <- function(id, # nolint: object_length.
                                              total_label,
                                              drop_arm_levels,
                                              label,
-                                             basic_table_args) {
+                                             basic_table_args,
+                                             decorators) {
   with_reporter <- !missing(reporter) && inherits(reporter, "Reporter")
   with_filter <- !missing(filter_panel_api) && inherits(filter_panel_api, "FilterPanelAPI")
   checkmate::assert_class(data, "reactive")
@@ -664,8 +677,15 @@ srv_t_abnormality_by_worst_grade <- function(id, # nolint: object_length.
       teal.code::eval_code(merged$anl_q(), as.expression(unlist(my_calls)))
     })
 
+    decorated_table_q <- srv_decorate_teal_data(
+      id = "decorator",
+      data = all_q,
+      decorators = select_decorators(decorators, "table"),
+      expr = table
+    )
+
     # Outputs to render.
-    table_r <- reactive(all_q()[["result"]])
+    table_r <- reactive(decorated_table_q()[["table"]])
 
     teal.widgets::table_with_settings_srv(
       id = "table",
@@ -675,7 +695,7 @@ srv_t_abnormality_by_worst_grade <- function(id, # nolint: object_length.
     # Render R code.
     teal.widgets::verbatim_popup_srv(
       id = "rcode",
-      verbatim_content = reactive(teal.code::get_code(all_q())),
+      verbatim_content = reactive(teal.code::get_code(req(decorated_table_q()))),
       title = label
     )
 
@@ -695,7 +715,7 @@ srv_t_abnormality_by_worst_grade <- function(id, # nolint: object_length.
           card$append_text("Comment", "header3")
           card$append_text(comment)
         }
-        card$append_src(teal.code::get_code(all_q()))
+        card$append_src(teal.code::get_code(req(decorated_table_q())))
         card
       }
       teal.reporter::simple_reporter_srv("simple_reporter", reporter = reporter, card_fun = card_fun)