blob: 8c7945e3591e63770792e92591bbeb4ab5c6c02a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
import {TimeoutError} from '../common/Errors.js';
/**
* @internal
*/
export interface DeferredPromise<T> extends Promise<T> {
finished: () => boolean;
resolved: () => boolean;
resolve: (value: T) => void;
reject: (reason?: unknown) => void;
}
/**
* @internal
*/
export interface DeferredPromiseOptions {
message: string;
timeout: number;
}
/**
* Creates and returns a promise along with the resolve/reject functions.
*
* If the promise has not been resolved/rejected within the `timeout` period,
* the promise gets rejected with a timeout error. `timeout` has to be greater than 0 or
* it is ignored.
*
* @internal
*/
export function createDeferredPromise<T>(
opts?: DeferredPromiseOptions
): DeferredPromise<T> {
let isResolved = false;
let isRejected = false;
let resolver: (value: T) => void;
let rejector: (reason?: unknown) => void;
const taskPromise = new Promise<T>((resolve, reject) => {
resolver = resolve;
rejector = reject;
});
const timeoutId =
opts && opts.timeout > 0
? setTimeout(() => {
isRejected = true;
rejector(new TimeoutError(opts.message));
}, opts.timeout)
: undefined;
return Object.assign(taskPromise, {
resolved: () => {
return isResolved;
},
finished: () => {
return isResolved || isRejected;
},
resolve: (value: T) => {
if (timeoutId) {
clearTimeout(timeoutId);
}
isResolved = true;
resolver(value);
},
reject: (err?: unknown) => {
clearTimeout(timeoutId);
isRejected = true;
rejector(err);
},
});
}
|
