Construct a Scene Action — construct_action • scenes

Generate the check function for an action, and use it to create a scene_action object.

Usage

construct_action(fn, ..., negate = FALSE, methods = "GET")

Arguments

fn: A function that takes a request (and potentially other arguments) and returns TRUE or FALSE.
...: Additional parameters passed on to fn.
negate: If TRUE, trigger the corresponding scene when this action is not matched.
methods: The http methods which needs to be accepted in order for this function to make sense. Default "GET" should work in almost all cases.

Value

A scene_action.

Examples

simple_function <- function(request) {
  !missing(request) && length(request) > 0
}
sample_action <- construct_action(simple_function)
sample_action$check_fn()
#> [1] FALSE
sample_action$check_fn(list())
#> [1] FALSE
sample_action$check_fn(list(a = 1))
#> [1] TRUE