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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* Copyright 2019 gRPC authors.
*
* 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.
*
*/
export type Deadline = Date | number;
export function minDeadline(...deadlineList: Deadline[]): Deadline {
let minValue = Infinity;
for (const deadline of deadlineList) {
const deadlineMsecs =
deadline instanceof Date ? deadline.getTime() : deadline;
if (deadlineMsecs < minValue) {
minValue = deadlineMsecs;
}
}
return minValue;
}
const units: Array<[string, number]> = [
['m', 1],
['S', 1000],
['M', 60 * 1000],
['H', 60 * 60 * 1000],
];
export function getDeadlineTimeoutString(deadline: Deadline) {
const now = new Date().getTime();
if (deadline instanceof Date) {
deadline = deadline.getTime();
}
const timeoutMs = Math.max(deadline - now, 0);
for (const [unit, factor] of units) {
const amount = timeoutMs / factor;
if (amount < 1e8) {
return String(Math.ceil(amount)) + unit;
}
}
throw new Error('Deadline is too far in the future');
}
/**
* See https://nodejs.org/api/timers.html#settimeoutcallback-delay-args
* In particular, "When delay is larger than 2147483647 or less than 1, the
* delay will be set to 1. Non-integer delays are truncated to an integer."
* This number of milliseconds is almost 25 days.
*/
const MAX_TIMEOUT_TIME = 2147483647;
/**
* Get the timeout value that should be passed to setTimeout now for the timer
* to end at the deadline. For any deadline before now, the timer should end
* immediately, represented by a value of 0. For any deadline more than
* MAX_TIMEOUT_TIME milliseconds in the future, a timer cannot be set that will
* end at that time, so it is treated as infinitely far in the future.
* @param deadline
* @returns
*/
export function getRelativeTimeout(deadline: Deadline) {
const deadlineMs = deadline instanceof Date ? deadline.getTime() : deadline;
const now = new Date().getTime();
const timeout = deadlineMs - now;
if (timeout < 0) {
return 0;
} else if (timeout > MAX_TIMEOUT_TIME) {
return Infinity;
} else {
return timeout;
}
}
export function deadlineToString(deadline: Deadline): string {
if (deadline instanceof Date) {
return deadline.toISOString();
} else {
const dateDeadline = new Date(deadline);
if (Number.isNaN(dateDeadline.getTime())) {
return '' + deadline;
} else {
return dateDeadline.toISOString();
}
}
}
|
