@effect-ts/system/_mjs/Promise/poll.mjs

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

// ets_tracing: off
import { succeedWith } from "../Effect/core.mjs";
import * as O from "../Option/index.mjs";
/**
 * Checks for completion of this Promise. Returns the result effect if this
 * promise has already been completed or a `None` otherwise.
 */

export function poll(promise) {
  return succeedWith(() => {
    const state = promise.state.get;

    switch (state._tag) {
      case "Done":
        {
          return O.some(state.value);
        }

      case "Pending":
        {
          return O.none;
        }
    }
  });
}
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