Introduce decorators for tm_t events by grade

[llrs-roche]

Part of insightsengineering/teal#1371

Example with decorators

load_all("../teal")
load_all(".")
library(dplyr)

data <- teal_data()
data <- within(data, {
  ADSL <- tmc_ex_adsl
  .lbls_adae <- col_labels(tmc_ex_adae)
  ADAE <- tmc_ex_adae %>%
    mutate_if(is.character, as.factor) #' be certain of having factors
  col_labels(ADAE) <- .lbls_adae
})
join_keys(data) <- default_cdisc_join_keys[names(data)]

ADSL <- data[["ADSL"]]
ADAE <- data[["ADAE"]]

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)))
    )
  )
}

app <- init(
  data = data,
  modules = modules(
    tm_t_events_by_grade(
      label = "Adverse Events by Grade Table",
      dataname = "ADAE",
      arm_var = choices_selected(c("ARM", "ARMCD"), "ARM"),
      llt = choices_selected(
        choices = variable_choices(ADAE, c("AETERM", "AEDECOD")),
        selected = c("AEDECOD")
      ),
      hlt = choices_selected(
        choices = variable_choices(ADAE, c("AEBODSYS", "AESOC")),
        selected = "AEBODSYS"
      ),
      grade = choices_selected(
        choices = variable_choices(ADAE, c("AETOXGR", "AESEV")),
        selected = "AETOXGR"
      ),
      decorators = list(insert_rrow_decorator())
    )
  )
)
shinyApp(app$ui, app$server)

[averissimo]

LGTM! 🎉

[averissimo]

Wrong function documentation

[m7pr]

Leaving this for @averissimo to re-review

[averissimo]

Some changes to documentation, but mainly 1 question about when is pruned_and_sorted_result not created.

Great job here!