1/*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17export const INVALID_TIME_NS = 0n;
18
19export class TimeRange {
20  constructor(readonly from: Timestamp, readonly to: Timestamp) {}
21
22  containsTimestamp(ts: Timestamp): boolean {
23    const min = this.from.getValueNs();
24    const max = this.to.getValueNs();
25    return ts.getValueNs() >= min && ts.getValueNs() <= max;
26  }
27}
28
29export interface TimezoneInfo {
30  timezone: string;
31  locale: string;
32}
33
34export interface TimestampFormatter {
35  format(timestamp: Timestamp): string;
36}
37
38export class Timestamp {
39  private readonly utcValueNs: bigint;
40  private readonly formatter: TimestampFormatter;
41
42  constructor(valueNs: bigint, formatter: TimestampFormatter) {
43    this.utcValueNs = valueNs;
44    this.formatter = formatter;
45  }
46
47  getValueNs(): bigint {
48    return this.utcValueNs;
49  }
50
51  valueOf(): bigint {
52    return this.utcValueNs;
53  }
54
55  in(range: TimeRange): boolean {
56    return (
57      range.from.getValueNs() <= this.getValueNs() &&
58      this.getValueNs() <= range.to.getValueNs()
59    );
60  }
61
62  add(n: bigint): Timestamp {
63    return new Timestamp(this.getValueNs() + n, this.formatter);
64  }
65
66  minus(n: bigint): Timestamp {
67    return new Timestamp(this.getValueNs() - n, this.formatter);
68  }
69
70  times(n: bigint): Timestamp {
71    return new Timestamp(this.getValueNs() * n, this.formatter);
72  }
73
74  div(n: bigint): Timestamp {
75    return new Timestamp(this.getValueNs() / n, this.formatter);
76  }
77
78  format(): string {
79    return this.formatter.format(this);
80  }
81}
82