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S.P.L.U.R.T-Station-13/code/modules/wiremod/components/list/index.dm
2021-10-28 12:51:31 +08:00

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/**
* # Index Component
*
* Return the index of a list
*/
/obj/item/circuit_component/index
display_name = "Index List"
desc = "A component that returns the value of a list at a given index."
/// The input port
var/datum/port/input/list_port
var/datum/port/input/index_port
/// The result from the output
var/datum/port/output/output
circuit_flags = CIRCUIT_FLAG_INPUT_SIGNAL|CIRCUIT_FLAG_OUTPUT_SIGNAL
/obj/item/circuit_component/index/Initialize()
. = ..()
index_port = add_input_port("Index", PORT_TYPE_ANY)
list_port = add_input_port("List", PORT_TYPE_LIST)
output = add_output_port("Value", PORT_TYPE_ANY)
/obj/item/circuit_component/index/input_received(datum/port/input/port)
. = ..()
if(.)
return
var/index = index_port.value
var/list/list_input = list_port.value
if(!islist(list_input) || !index)
output.set_output(null)
return
if(isnum(index) && (index < 1 || index > length(list_input)))
output.set_output(null)
return
output.set_output(list_input[index])