@effect-ts/system/_src/Experimental/Stream/_internal/api/repeatEffectChunkOption.ts

Effect-TS is a zero dependency set of libraries to write highly productive, purely functional TypeScript at scale.

// ets_tracing: off

import type * as CK from "../../../../Collections/Immutable/Chunk/index.js"
import * as Tp from "../../../../Collections/Immutable/Tuple/index.js"
import * as T from "../../../../Effect/index.js"
import * as O from "../../../../Option/index.js"
import type * as C from "../core.js"
import * as UnfoldChunkEffect from "./unfoldChunkEffect.js"

/**
 * Creates a stream from an effect producing chunks of `A` values until it fails with None.
 */
export function repeatEffectChunkOption<R, E, A>(
  fa: T.Effect<R, O.Option<E>, CK.Chunk<A>>
): C.Stream<R, E, A> {
  return UnfoldChunkEffect.unfoldChunkEffect(fa, (fa) => {
    return T.catchAll_(
      T.map_(fa, (chunk) => O.some(Tp.tuple(chunk, fa))),
      O.fold(
        () => T.none,
        (e) => T.fail(e)
      )
    )
  })
}