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#' Logging scope-specific parameters of events
#'
#' With \code{log_params} you can define a set of named parameters,
#' which are common for events from the same scope
#' (for example inside an observer).
#' These parameters will be added to event-specific parameters
#' and logged within the same log entry.
#'
#' The function takes all objects passed inside \code{...} argument,
#' evaluates them, and stores them in a new environment called
#' \code{log_setting} which is assigned to the parent environment
#' from which the \code{log_params} function was called.
#'
#' @param ... a set of named objects
#' (usually of type character, numeric, or date)
#' to be logged as event parameters.
#'
#' @family setting up logging parameters functions
#'
#' @export
#' @examples
#' if (interactive()) {
#' set_logging()
#' shiny::shinyApp(
#' ui = shiny::fluidPage(log_init()),
#' server = function(input, output) {
#' set_logging_session()
#' observe({
#' log_params("observer" = "A")
#' log_event("Event A.1")
#' log_event("Event A.2")
#' })
#' observe({
#' log_params("observer" = "B")
#' log_event("Event B.1")
#' log_event("Event B.2")
#' })
#' }
#' )
#' }
log_params <- function(...) {
params <- eval(list(...))
assign("log_settings", list2env(params), pos = parent.frame())
} # end of log_params
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