forked from ng-bootstrap/ng-bootstrap
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ngb-calendar.ts
110 lines (89 loc) · 3.19 KB
/
ngb-calendar.ts
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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
import {NgbDate} from './ngb-date';
import {Injectable} from '@angular/core';
import {isNumber} from '../util/util';
function fromJSDate(jsDate: Date) {
return new NgbDate(jsDate.getFullYear(), jsDate.getMonth() + 1, jsDate.getDate());
}
function toJSDate(date: NgbDate) {
const jsDate = new Date(date.year, date.month - 1, date.day);
// this is done avoid 30 -> 1930 conversion
if (!isNaN(jsDate.getTime())) {
jsDate.setFullYear(date.year);
}
return jsDate;
}
export type NgbPeriod = 'y' | 'm' | 'd';
@Injectable()
export abstract class NgbCalendar {
abstract getDaysPerWeek(): number;
abstract getMonths(): number[];
abstract getWeeksPerMonth(): number;
abstract getWeekday(date: NgbDate): number;
abstract getNext(date: NgbDate, period?: NgbPeriod, number?: number): NgbDate;
abstract getPrev(date: NgbDate, period?: NgbPeriod, number?: number): NgbDate;
abstract getWeekNumber(week: NgbDate[], firstDayOfWeek: number): number;
abstract getToday(): NgbDate;
abstract isValid(date: NgbDate): boolean;
}
@Injectable()
export class NgbCalendarGregorian extends NgbCalendar {
getDaysPerWeek() { return 7; }
getMonths() { return [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]; }
getWeeksPerMonth() { return 6; }
getNext(date: NgbDate, period: NgbPeriod = 'd', number = 1) {
let jsDate = toJSDate(date);
let checkMonth = true;
let expectedMonth = jsDate.getMonth();
switch (period) {
case 'y':
jsDate.setFullYear(jsDate.getFullYear() + number);
break;
case 'm':
expectedMonth += number;
jsDate.setMonth(expectedMonth);
expectedMonth = expectedMonth % 12;
if (expectedMonth < 0) {
expectedMonth = expectedMonth + 12;
}
break;
case 'd':
jsDate.setDate(jsDate.getDate() + number);
checkMonth = false;
break;
default:
return date;
}
if (checkMonth && jsDate.getMonth() !== expectedMonth) {
// this means the destination month has less days than the initial month
// let's go back to the end of the previous month:
jsDate.setDate(0);
}
return fromJSDate(jsDate);
}
getPrev(date: NgbDate, period: NgbPeriod = 'd', number = 1) { return this.getNext(date, period, -number); }
getWeekday(date: NgbDate) {
let jsDate = toJSDate(date);
let day = jsDate.getDay();
// in JS Date Sun=0, in ISO 8601 Sun=7
return day === 0 ? 7 : day;
}
getWeekNumber(week: NgbDate[], firstDayOfWeek: number) {
// in JS Date Sun=0, in ISO 8601 Sun=7
if (firstDayOfWeek === 7) {
firstDayOfWeek = 0;
}
const thursdayIndex = (4 + 7 - firstDayOfWeek) % 7;
let date = week[thursdayIndex];
const jsDate = toJSDate(date);
jsDate.setDate(jsDate.getDate() + 4 - (jsDate.getDay() || 7)); // Thursday
const time = jsDate.getTime();
jsDate.setMonth(0); // Compare with Jan 1
jsDate.setDate(1);
return Math.floor(Math.round((time - jsDate.getTime()) / 86400000) / 7) + 1;
}
getToday(): NgbDate { return fromJSDate(new Date()); }
isValid(date: NgbDate): boolean {
return date && isNumber(date.year) && isNumber(date.month) && isNumber(date.day) &&
!isNaN(toJSDate(date).getTime());
}
}