Fix

2025-08-19 20:13:58 +02:00
parent fef1b70b2c
commit 6da857f982
4 changed files with 12 additions and 11 deletions
@@ -0,0 +1,63 @@
+import { type Duration, Effect, Equal, type Equivalence, flow, identity, Option, type ParseResult, Ref, Schema, Stream, SubscriptionRef } from "effect"
+import * as React from "react"
+import { useFork } from "../useFork.js"
+import { useOnce } from "../useOnce.js"
+import { useRefState } from "../useRefState.js"
+
+
+export namespace useInput {
+    export interface Options<A, R> {
+        readonly schema: Schema.Schema<A, string, R>
+        readonly equivalence?: Equivalence.Equivalence<A>
+        readonly ref: SubscriptionRef.SubscriptionRef<A>
+        readonly debounce?: Duration.DurationInput
+    }
+
+    export interface Result {
+        readonly value: string
+        readonly setValue: React.Dispatch<React.SetStateAction<string>>
+        readonly error: Option.Option<ParseResult.ParseError>
+    }
+}
+
+export const useInput: {
+    <A, R>(options: useInput.Options<A, R>): Effect.Effect<useInput.Result, ParseResult.ParseError, R>
+} = Effect.fnUntraced(function* <A, R>(options: useInput.Options<A, R>) {
+    const internalRef = yield* useOnce(() => options.ref.pipe(
+        Effect.andThen(Schema.encode(options.schema)),
+        Effect.andThen(SubscriptionRef.make),
+    ))
+    const [error, setError] = React.useState(Option.none<ParseResult.ParseError>())
+
+    yield* useFork(() => Effect.all([
+        // Sync the upstream state with the internal state
+        // Only mutate the internal state if the upstream value is actually different. This avoids infinite re-render loops.
+        Stream.runForEach(options.ref.changes, upstreamValue =>
+            Effect.whenEffect(
+                Effect.andThen(
+                    Schema.encode(options.schema)(upstreamValue),
+                    encodedUpstreamValue => Ref.set(internalRef, encodedUpstreamValue),
+                ),
+                internalRef.pipe(
+                    Effect.andThen(Schema.decode(options.schema)),
+                    Effect.andThen(decodedInternalValue => !(options.equivalence ?? Equal.equals)(upstreamValue, decodedInternalValue)),
+                    Effect.catchTag("ParseError", () => Effect.succeed(false)),
+                ),
+            )
+        ),
+
+        // Sync all changes to the internal state with upstream
+        Stream.runForEach(
+            internalRef.changes.pipe(options.debounce ? Stream.debounce(options.debounce) : identity),
+            flow(
+                Schema.decode(options.schema),
+                Effect.andThen(v => Ref.set(options.ref, v)),
+                Effect.andThen(() => setError(Option.none())),
+                Effect.catchTag("ParseError", e => Effect.sync(() => setError(Option.some(e)))),
+            ),
+        ),
+    ], { concurrency: "unbounded" }), [options.schema, options.equivalence, options.ref, options.debounce, internalRef])
+
+    const [value, setValue] = yield* useRefState(internalRef)
+    return { value, setValue, error }
+})