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Cleanup scope functions

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centauri 2025-09-01 21:59:35 +01:00
parent 4b4db9602e
commit ce24f8ade9
4 changed files with 134 additions and 105 deletions
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55
src/switch.luau
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@ -6,26 +6,26 @@ local timeout = require "./timeout" ()
type Array<T> = { T }
type Map<K, V> = { [K]: V }
type Source<T> = () -> T
type Component<T> = (Source<boolean>) -> T
type Component<T> = (Source<boolean>) -> (T, number?)
local function switch_map<K, Obj>(
input: Source<K>,
map: Map<K, Component<Obj>>
): Source<nil | Obj | Array<Obj>>
local output = source(nil :: nil | Obj | Array<Obj>)
local caches = {} :: Map<K, {
destroy_scope: () -> (),
present: (boolean?) -> boolean,
local scopes = {} :: Map<K, {
destroy: () -> (),
object: Obj,
delay: number,
present: (boolean?) -> boolean,
timeout: { cancel: boolean }?
}>
local output = source(nil :: nil | Obj | Array<Obj>)
local function update_output()
local objects = {}
for _, cache in caches do
table.insert(objects, cache.object)
for _, scope in scopes do
table.insert(objects, scope.object)
end
output(
@ -38,33 +38,36 @@ local function switch_map<K, Obj>(
effect(function()
local key: K? = input()
for k, cache in caches do
-- destroy (or queue destroy) all scopes not associated with the input key
for k, scope in scopes do
if k == key then continue end
cache.present(false)
if cache.delay == 0 then
cache.destroy_scope()
caches[k] = nil
scope.present(false)
if scope.delay == 0 then
scope.destroy()
scopes[k] = nil
else
if cache.timeout == nil then
cache.timeout = timeout(cache.delay, function()
cache.destroy_scope()
caches[k] = nil
if scope.timeout == nil then
scope.timeout = timeout(scope.delay, function()
scope.destroy()
scopes[k] = nil
update_output()
end)
end
end
end
-- create new scope or abort destruction of existing scope if key exists
if key ~= nil then
local cache = caches[key]
local scope = scopes[key]
if cache then
cache.present(true)
if scope then
scope.present(true)
if cache.timeout then
cache.timeout.cancel = true
cache.timeout = nil
if scope.timeout then
scope.timeout.cancel = true
scope.timeout = nil
end
else
local component = map[key]
@ -85,11 +88,11 @@ local function switch_map<K, Obj>(
present(true)
caches[key] = {
destroy_scope = destroy,
present = present,
scopes[key] = {
destroy = destroy,
object = object,
delay = delay or 0,
present = present,
timeout = nil
}
end