96 lines
2.9 KiB
TypeScript
96 lines
2.9 KiB
TypeScript
/*
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* Copyright 2019 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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export type Deadline = Date | number;
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export function minDeadline(...deadlineList: Deadline[]): Deadline {
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let minValue = Infinity;
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for (const deadline of deadlineList) {
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const deadlineMsecs =
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deadline instanceof Date ? deadline.getTime() : deadline;
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if (deadlineMsecs < minValue) {
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minValue = deadlineMsecs;
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}
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}
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return minValue;
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}
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const units: Array<[string, number]> = [
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['m', 1],
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['S', 1000],
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['M', 60 * 1000],
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['H', 60 * 60 * 1000],
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];
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export function getDeadlineTimeoutString(deadline: Deadline) {
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const now = new Date().getTime();
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if (deadline instanceof Date) {
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deadline = deadline.getTime();
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}
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const timeoutMs = Math.max(deadline - now, 0);
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for (const [unit, factor] of units) {
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const amount = timeoutMs / factor;
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if (amount < 1e8) {
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return String(Math.ceil(amount)) + unit;
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}
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}
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throw new Error('Deadline is too far in the future');
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}
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/**
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* See https://nodejs.org/api/timers.html#settimeoutcallback-delay-args
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* In particular, "When delay is larger than 2147483647 or less than 1, the
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* delay will be set to 1. Non-integer delays are truncated to an integer."
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* This number of milliseconds is almost 25 days.
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*/
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const MAX_TIMEOUT_TIME = 2147483647;
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/**
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* Get the timeout value that should be passed to setTimeout now for the timer
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* to end at the deadline. For any deadline before now, the timer should end
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* immediately, represented by a value of 0. For any deadline more than
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* MAX_TIMEOUT_TIME milliseconds in the future, a timer cannot be set that will
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* end at that time, so it is treated as infinitely far in the future.
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* @param deadline
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* @returns
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*/
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export function getRelativeTimeout(deadline: Deadline) {
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const deadlineMs = deadline instanceof Date ? deadline.getTime() : deadline;
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const now = new Date().getTime();
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const timeout = deadlineMs - now;
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if (timeout < 0) {
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return 0;
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} else if (timeout > MAX_TIMEOUT_TIME) {
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return Infinity;
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} else {
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return timeout;
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}
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}
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export function deadlineToString(deadline: Deadline): string {
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if (deadline instanceof Date) {
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return deadline.toISOString();
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} else {
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const dateDeadline = new Date(deadline);
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if (Number.isNaN(dateDeadline.getTime())) {
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return '' + deadline;
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} else {
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return dateDeadline.toISOString();
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}
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}
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}
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