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instance-state.ts
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47 lines (37 loc) · 1.75 KB
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import { Effect, ScopedCache, Scope } from "effect"
import { Instance, type InstanceContext } from "@/project/instance"
import { registerDisposer } from "./instance-registry"
const TypeId = "~opencode/InstanceState"
export interface InstanceState<A, E = never, R = never> {
readonly [TypeId]: typeof TypeId
readonly cache: ScopedCache.ScopedCache<string, A, E, R>
}
export namespace InstanceState {
export const make = <A, E = never, R = never>(
init: (ctx: InstanceContext) => Effect.Effect<A, E, R | Scope.Scope>,
): Effect.Effect<InstanceState<A, E, Exclude<R, Scope.Scope>>, never, R | Scope.Scope> =>
Effect.gen(function* () {
const cache = yield* ScopedCache.make<string, A, E, R>({
capacity: Number.POSITIVE_INFINITY,
lookup: () => init(Instance.current),
})
const off = registerDisposer((directory) => Effect.runPromise(ScopedCache.invalidate(cache, directory)))
yield* Effect.addFinalizer(() => Effect.sync(off))
return {
[TypeId]: TypeId,
cache,
}
})
export const get = <A, E, R>(self: InstanceState<A, E, R>) =>
Effect.suspend(() => ScopedCache.get(self.cache, Instance.directory))
export const use = <A, E, R, B>(self: InstanceState<A, E, R>, select: (value: A) => B) =>
Effect.map(get(self), select)
export const useEffect = <A, E, R, B, E2, R2>(
self: InstanceState<A, E, R>,
select: (value: A) => Effect.Effect<B, E2, R2>,
) => Effect.flatMap(get(self), select)
export const has = <A, E, R>(self: InstanceState<A, E, R>) =>
Effect.suspend(() => ScopedCache.has(self.cache, Instance.directory))
export const invalidate = <A, E, R>(self: InstanceState<A, E, R>) =>
Effect.suspend(() => ScopedCache.invalidate(self.cache, Instance.directory))
}