/*
Copyright 2020 Bruno Windels <bruno@windels.cloud>
Copyright 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.
*/

import {
    AbortError,
    ConnectionError
} from "../error.js";


export function abortOnTimeout(createTimeout, timeoutAmount, requestResult, responsePromise) {
    const timeout = createTimeout(timeoutAmount);
    // abort request if timeout finishes first
    let timedOut = false;
    timeout.elapsed().then(
        () => {
            timedOut = true;
            requestResult.abort();
        },
        () => {}    // ignore AbortError when timeout is aborted
    );
    // abort timeout if request finishes first
    return responsePromise.then(
        response => {
            timeout.abort();
            return response;
        },
        err => {
            timeout.abort();
            // map error to TimeoutError
            if (err instanceof AbortError && timedOut) {
                throw new ConnectionError(`Request timed out after ${timeoutAmount}ms`, true);
            } else {
                throw err;
            }
        }
    );
}