Deps galore
Kuba Orlik
4 years ago
parent
04a4fa2953
commit
e24cc50bc3
@ -1,96 +0,0 @@
|
||||
import { deferedSpawn } from "async-spawner";
|
||||
import Emittery from "emittery";
|
||||
import { promisify } from "util";
|
||||
|
||||
//needed to pass information on wether or not the promise has been aborted witout 'this'
|
||||
class AbortableEmittery extends Emittery {
|
||||
public aborted = false;
|
||||
|
||||
abort() {
|
||||
this.aborted = true;
|
||||
this.emit("abort");
|
||||
}
|
||||
}
|
||||
|
||||
class AbortablePromise<T> extends Promise<T | null> {
|
||||
private emitter: AbortableEmittery;
|
||||
|
||||
constructor(
|
||||
make_generator: (
|
||||
await_or_abort: (
|
||||
promise: Promise<any>,
|
||||
on_abort: () => void
|
||||
) => Promise<void>
|
||||
) => AsyncGenerator
|
||||
) {
|
||||
const emitter = new AbortableEmittery();
|
||||
const await_or_abort = (
|
||||
promise: Promise<any>,
|
||||
on_abort: () => void
|
||||
) => {
|
||||
return new Promise((resolve, reject) => {
|
||||
let resolved = false;
|
||||
emitter.on("abort", () => {
|
||||
if (!resolved) {
|
||||
on_abort();
|
||||
resolve(null);
|
||||
resolved = true;
|
||||
}
|
||||
});
|
||||
promise
|
||||
.then((result) => {
|
||||
if (!resolved) {
|
||||
resolve(result);
|
||||
resolved = true;
|
||||
}
|
||||
})
|
||||
.catch(reject);
|
||||
});
|
||||
};
|
||||
super(async (resolve, reject) => {
|
||||
let step_value;
|
||||
const generator = make_generator(await_or_abort);
|
||||
do {
|
||||
if (emitter.aborted) {
|
||||
resolve(null);
|
||||
return;
|
||||
}
|
||||
step_value = await generator.next();
|
||||
} while (!step_value.done);
|
||||
});
|
||||
this.emitter = emitter;
|
||||
}
|
||||
|
||||
abort() {
|
||||
this.emitter.abort();
|
||||
}
|
||||
}
|
||||
|
||||
// const sleep = promisify((timeout: number, callback: (...args: any[]) => void) =>
|
||||
// setTimeout(callback, timeout)
|
||||
// );
|
||||
|
||||
// const a = new AbortablePromise(async function* () {
|
||||
// yield await sleep(1000);
|
||||
// console.log("awaited 100");
|
||||
// yield await sleep(2000);
|
||||
// console.log("awaited 200");
|
||||
// yield await sleep(3000);
|
||||
// console.log("awaited 300");
|
||||
// });
|
||||
|
||||
// setTimeout(() => a.abort(), 1500);
|
||||
|
||||
const b = new AbortablePromise(async function* (await_or_abort) {
|
||||
const ping = await deferedSpawn("ping", ["8.8.8.8"]);
|
||||
while (true) {
|
||||
console.log(
|
||||
await await_or_abort(ping.waitForNextData(), () => {
|
||||
ping.kill();
|
||||
})
|
||||
);
|
||||
yield;
|
||||
}
|
||||
});
|
||||
|
||||
setTimeout(() => b.abort(), 5000);
|
||||
Loading…
Reference in New Issue