Files
effect-fc/packages/effect-fc/src/Subscribable.ts
Julien Valverdé e02e43e18c
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2026-04-29 16:51:27 +02:00

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TypeScript

import { Effect, Equivalence, Stream } from "effect"
import { Subscribable } from "effect-lens"
import * as React from "react"
import * as Component from "./Component.js"
export * from "effect-lens/Subscribable"
export const zipLatestAll = <const T extends readonly Subscribable.Subscribable<any, any, any>[]>(
...elements: T
): Subscribable.Subscribable<
[T[number]] extends [never]
? never
: { [K in keyof T]: T[K] extends Subscribable.Subscribable<infer A, infer _E, infer _R> ? A : never },
[T[number]] extends [never] ? never : T[number] extends Subscribable.Subscribable<infer _A, infer E, infer _R> ? E : never,
[T[number]] extends [never] ? never : T[number] extends Subscribable.Subscribable<infer _A, infer _E, infer R> ? R : never
> => Subscribable.make({
get: Effect.all(elements.map(v => v.get)),
changes: Stream.zipLatestAll(...elements.map(v => v.changes)),
}) as any
export declare namespace useAll {
export type Success<T extends readonly Subscribable.Subscribable<any, any, any>[]> = [T[number]] extends [never]
? never
: { [K in keyof T]: T[K] extends Subscribable.Subscribable<infer A, infer _E, infer _R> ? A : never }
export interface Options<A> {
readonly equivalence?: Equivalence.Equivalence<A>
}
}
export const useAll = Effect.fnUntraced(function* <const T extends readonly Subscribable.Subscribable<any, any, any>[]>(
elements: T,
options?: useAll.Options<useAll.Success<NoInfer<T>>>,
): Effect.fn.Return<
useAll.Success<T>,
[T[number]] extends [never] ? never : T[number] extends Subscribable.Subscribable<infer _A, infer E, infer _R> ? E : never,
[T[number]] extends [never] ? never : T[number] extends Subscribable.Subscribable<infer _A, infer _E, infer R> ? R : never
> {
const [reactStateValue, setReactStateValue] = React.useState(
yield* Component.useOnMount(() => Effect.all(elements.map(v => v.get)))
)
yield* Component.useReactEffect(() => Stream.zipLatestAll(...elements.map(ref => ref.changes)).pipe(
Stream.changesWith((options?.equivalence as Equivalence.Equivalence<any[]> | undefined) ?? Equivalence.array(Equivalence.strict())),
Stream.runForEach(v =>
Effect.sync(() => setReactStateValue(v))
),
Effect.forkScoped,
), elements)
return reactStateValue as any
})