50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
/*
|
|
Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
// Returns a promise which resolves when the input promise resolves with its value
|
|
// or when the timeout of ms is reached with the value of given timeoutValue
|
|
export async function timeout<T, Y>(promise: Promise<T>, timeoutValue: Y, ms: number): Promise<T | Y> {
|
|
const timeoutPromise = new Promise<T | Y>((resolve) => {
|
|
const timeoutId = window.setTimeout(resolve, ms, timeoutValue);
|
|
promise.then(() => {
|
|
clearTimeout(timeoutId);
|
|
});
|
|
});
|
|
|
|
return Promise.race([promise, timeoutPromise]);
|
|
}
|
|
|
|
// Helper method to retry a Promise a given number of times or until a predicate fails
|
|
export async function retry<T, E extends Error>(
|
|
fn: () => Promise<T>,
|
|
num: number,
|
|
predicate?: (e: E) => boolean,
|
|
): Promise<T> {
|
|
let lastErr!: any;
|
|
for (let i = 0; i < num; i++) {
|
|
try {
|
|
const v = await fn();
|
|
// If `await fn()` throws then we won't reach here
|
|
return v;
|
|
} catch (err) {
|
|
if (predicate && !predicate(err as E)) {
|
|
throw err;
|
|
}
|
|
lastErr = err;
|
|
}
|
|
}
|
|
throw lastErr;
|
|
}
|