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effect-view/packages/effect-fc/src/ReactRuntime.ts
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Julien Valverdé 6b9c177ae7
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2025-10-24 00:00:14 +02:00

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TypeScript

/** biome-ignore-all lint/complexity/useArrowFunction: necessary for class prototypes */
import { Effect, Layer, ManagedRuntime, Predicate, type Runtime } from "effect"
import * as React from "react"
import * as Component from "./Component.js"
export const TypeId: unique symbol = Symbol.for("@effect-fc/ReactRuntime/ReactRuntime")
export type TypeId = typeof TypeId
export interface ReactRuntime<R, ER> {
new(_: never): Record<string, never>
readonly [TypeId]: TypeId
readonly runtime: ManagedRuntime.ManagedRuntime<R, ER>
readonly context: React.Context<Runtime.Runtime<R>>
}
const ReactRuntimeProto = Object.freeze({ [TypeId]: TypeId } as const)
export const isReactRuntime = (u: unknown): u is ReactRuntime<unknown, unknown> => Predicate.hasProperty(u, TypeId)
export const make = <R, ER>(
layer: Layer.Layer<R, ER>,
memoMap?: Layer.MemoMap,
): ReactRuntime<R | Component.ScopeMap, ER> => Object.setPrototypeOf(
Object.assign(function() {}, {
runtime: ManagedRuntime.make(
Layer.merge(layer, Component.ScopeMap.Default),
memoMap,
),
// biome-ignore lint/style/noNonNullAssertion: context initialization
context: React.createContext<Runtime.Runtime<R>>(null!),
}),
ReactRuntimeProto,
)
export namespace Provider {
export interface Props<R, ER> extends React.SuspenseProps {
readonly runtime: ReactRuntime<R, ER>
readonly children?: React.ReactNode
}
}
export const Provider = <R, ER>(
{ runtime, children, ...suspenseProps }: Provider.Props<R, ER>
): React.ReactNode => {
const promise = React.useMemo(() => Effect.runPromise(runtime.runtime.runtimeEffect), [runtime])
return React.createElement(
React.Suspense,
suspenseProps,
React.createElement(ProviderInner<R, ER>, { runtime, promise, children }),
)
}
interface ProviderInnerProps<R, ER> {
readonly runtime: ReactRuntime<R, ER>
readonly promise: Promise<Runtime.Runtime<R>>
readonly children?: React.ReactNode
}
const ProviderInner = <R, ER>(
{ runtime, promise, children }: ProviderInnerProps<R, ER>
): React.ReactNode => React.createElement(
runtime.context,
{ value: React.use(promise) },
children,
)