42 lines
1.9 KiB
TypeScript
42 lines
1.9 KiB
TypeScript
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import type { TransferTask } from "../../../domain/models";
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import { sftpTransferCenterStore } from "../sftpTransferCenterStore";
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type StreamResult = { error?: string; cancelled?: boolean; superseded?: boolean } | undefined;
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/** A live waiter owns bounded settlement evidence; persisted history stays compact. */
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export async function runTransferAndWaitForOwner(
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task: TransferTask,
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start: () => Promise<StreamResult>,
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shouldAbort: () => boolean,
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pausedAtResume?: TransferTask,
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): Promise<StreamResult> {
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// Register before admission/start: an owner may finish while dispatch waits for resume.
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let observation = sftpTransferCenterStore.observeTaskSettlement(task);
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try {
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for (;;) {
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if (shouldAbort()) throw new Error("Transfer cancelled");
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const admission = sftpTransferCenterStore.admitTaskRun(task, pausedAtResume);
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if (admission === "cancelled") throw new Error("Transfer cancelled");
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if (admission === "completed" || observation.read()?.status === "completed") return {};
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if (admission === "conflict") throw new Error("Transfer identity changed before dispatch");
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if (admission === "ready") break;
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await new Promise((resolve) => setTimeout(resolve, 200));
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}
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// Admission begins a new attempt; discard any previous failed settlement.
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observation.dispose();
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observation = sftpTransferCenterStore.observeTaskSettlement(task);
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const result = await start();
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if (!result?.superseded) return result;
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for (;;) {
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if (shouldAbort()) throw new Error("Transfer cancelled");
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const latest = observation.read();
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if (latest?.status === "completed") return { ...result, superseded: false };
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if (latest?.status === "failed") throw new Error(latest.error || "Transfer failed");
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if (latest?.status === "cancelled") throw new Error("Transfer cancelled");
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await new Promise((resolve) => setTimeout(resolve, 200));
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}
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} finally {
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observation.dispose();
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}
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}
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