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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { core, primordials } from "ext:core/mod.js";
import { op_fs_events_open, op_fs_events_poll } from "ext:core/ops";
const {
BadResourcePrototype,
InterruptedPrototype,
} = core;
const {
ArrayIsArray,
ObjectPrototypeIsPrototypeOf,
PromiseResolve,
SymbolAsyncIterator,
} = primordials;
import { SymbolDispose } from "ext:deno_web/00_infra.js";
class FsWatcher {
#rid = 0;
#promise;
constructor(paths, options) {
const { recursive } = options;
this.#rid = op_fs_events_open(recursive, paths);
}
unref() {
core.unrefOpPromise(this.#promise);
}
ref() {
core.refOpPromise(this.#promise);
}
async next() {
try {
this.#promise = op_fs_events_poll(this.#rid);
const value = await this.#promise;
return value ? { value, done: false } : { value: undefined, done: true };
} catch (error) {
if (ObjectPrototypeIsPrototypeOf(BadResourcePrototype, error)) {
return { value: undefined, done: true };
} else if (
ObjectPrototypeIsPrototypeOf(InterruptedPrototype, error)
) {
return { value: undefined, done: true };
}
throw error;
}
}
return(value) {
core.close(this.#rid);
return PromiseResolve({ value, done: true });
}
close() {
core.close(this.#rid);
}
[SymbolAsyncIterator]() {
return this;
}
[SymbolDispose]() {
core.tryClose(this.#rid);
}
}
function watchFs(
paths,
options = { __proto__: null, recursive: true },
) {
return new FsWatcher(ArrayIsArray(paths) ? paths : [paths], options);
}
export { watchFs };
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