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denoland-deno/cli/js/ops/fs_events.ts

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// Copyright 2019 the Deno authors. All rights reserved. MIT license.
import { sendSync, sendAsync } from "./dispatch_json.ts";
import { close } from "./resources.ts";
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export interface FsEvent {
kind: "any" | "access" | "create" | "modify" | "remove";
paths: string[];
}
class FsEvents implements AsyncIterableIterator<FsEvent> {
readonly rid: number;
constructor(paths: string[], options: { recursive: boolean }) {
const { recursive } = options;
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this.rid = sendSync("op_fs_events_open", { recursive, paths });
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}
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next(): Promise<IteratorResult<FsEvent>> {
return sendAsync("op_fs_events_poll", {
rid: this.rid,
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});
}
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return(value?: FsEvent): Promise<IteratorResult<FsEvent>> {
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close(this.rid);
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return Promise.resolve({ value, done: true });
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}
[Symbol.asyncIterator](): AsyncIterableIterator<FsEvent> {
return this;
}
}
export function fsEvents(
paths: string | string[],
options = { recursive: true }
): AsyncIterableIterator<FsEvent> {
return new FsEvents(Array.isArray(paths) ? paths : [paths], options);
}