0.1.2 (#4)

Co-authored-by: Julien Valverdé <julien.valverde@mailo.com>
Reviewed-on: https://gitea:3000/Thilawyn/reffuse/pulls/4

packages/extension-lazyref/src/index.ts

@@ -0,0 +1,29 @@
+import * as LazyRef from "@typed/lazy-ref"
+import { Effect, Stream } from "effect"
+import * as React from "react"
+import { ReffuseExtension, type ReffuseHelpers, SetStateAction } from "reffuse"
+
+
+export const LazyRefExtension = ReffuseExtension.make(() => ({
+    useLazyRefState<A, E, R>(
+        this: ReffuseHelpers.ReffuseHelpers<R>,
+        ref: LazyRef.LazyRef<A, E, R>,
+    ): [A, React.Dispatch<React.SetStateAction<A>>] {
+        const runSync = this.useRunSync()
+
+        const initialState = React.useMemo(() => runSync(ref), [])
+        const [reactStateValue, setReactStateValue] = React.useState(initialState)
+
+        this.useFork(() => Stream.runForEach(ref.changes, v => Effect.sync(() =>
+            setReactStateValue(v)
+        )), [ref])
+
+        const setValue = React.useCallback((setStateAction: React.SetStateAction<A>) =>
+            runSync(LazyRef.update(ref, prevState =>
+                SetStateAction.value(setStateAction, prevState)
+            )),
+        [ref])
+
+        return [reactStateValue, setValue]
+    },
+}))