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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { sendSync, sendAsync } from "./dispatch_json.ts";
import { close } from "./resources.ts";
export interface FsEvent {
kind: "any" | "access" | "create" | "modify" | "remove";
paths: string[];
}
interface FsWatcherOptions {
recursive: boolean;
}
class FsWatcher implements AsyncIterableIterator<FsEvent> {
readonly rid: number;
constructor(paths: string[], options: FsWatcherOptions) {
const { recursive } = options;
this.rid = sendSync("op_fs_events_open", { recursive, paths });
}
next(): Promise<IteratorResult<FsEvent>> {
return sendAsync("op_fs_events_poll", {
rid: this.rid,
});
}
return(value?: FsEvent): Promise<IteratorResult<FsEvent>> {
close(this.rid);
return Promise.resolve({ value, done: true });
}
[Symbol.asyncIterator](): AsyncIterableIterator<FsEvent> {
return this;
}
}
export function watchFs(
paths: string | string[],
options: FsWatcherOptions = { recursive: true },
): AsyncIterableIterator<FsEvent> {
return new FsWatcher(Array.isArray(paths) ? paths : [paths], options);
}
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