LP1822414 Ang date select readOnly & fixes
[Evergreen.git] / Open-ILS / src / eg2 / src / app / share / date-select / date-select.component.ts
1 import {Component, OnInit, Input, Output, ViewChild, EventEmitter} from '@angular/core';
2 import {NgbDateStruct} from '@ng-bootstrap/ng-bootstrap';
3
4 /**
5  * RE: displaying locale dates in the input field:
6  * https://github.com/ng-bootstrap/ng-bootstrap/issues/754
7  * https://stackoverflow.com/questions/40664523/angular2-ngbdatepicker-how-to-format-date-in-inputfield
8  */
9
10 @Component({
11   selector: 'eg-date-select',
12   templateUrl: './date-select.component.html',
13   styleUrls: ['date-select.component.css']
14 })
15 export class DateSelectComponent implements OnInit {
16
17     @Input() initialIso: string; // ISO string
18     @Input() initialYmd: string; // YYYY-MM-DD (uses local time zone)
19     @Input() initialDate: Date;  // Date object
20     @Input() required: boolean;
21     @Input() fieldName: string;
22     @Input() domId = '';
23     @Input() disabled: boolean;
24     @Input() readOnly: boolean;
25
26     current: NgbDateStruct;
27
28     @Output() onChangeAsDate: EventEmitter<Date>;
29     @Output() onChangeAsIso: EventEmitter<string>;
30     @Output() onChangeAsYmd: EventEmitter<string>;
31     @Output() onCleared: EventEmitter<string>;
32
33     // convenience methods to access current selected date
34     currentAsYmd(): string {
35         if (this.current == null) { return null; }
36         if (!this.isValidDate(this.current)) { return null; }
37         return `${this.current.year}-${String(this.current.month).padStart(2, '0')}-${String(this.current.day).padStart(2, '0')}`;
38     }
39     currentAsIso(): string {
40         if (this.current == null) { return null; }
41         if (!this.isValidDate(this.current)) { return null; }
42         const ymd = `${this.current.year}-${String(this.current.month).padStart(2, '0')}-${String(this.current.day).padStart(2, '0')}`;
43         const date = this.localDateFromYmd(ymd);
44         const iso = date.toISOString();
45         return iso;
46     }
47     currentAsDate(): Date {
48         if (this.current == null) { return null; }
49         if (!this.isValidDate(this.current)) { return null; }
50         const ymd = `${this.current.year}-${String(this.current.month).padStart(2, '0')}-${String(this.current.day).padStart(2, '0')}`;
51         const date = this.localDateFromYmd(ymd);
52         return date;
53     }
54
55     constructor() {
56         this.onChangeAsDate = new EventEmitter<Date>();
57         this.onChangeAsIso = new EventEmitter<string>();
58         this.onChangeAsYmd = new EventEmitter<string>();
59         this.onCleared = new EventEmitter<string>();
60     }
61
62     ngOnInit() {
63
64         if (this.initialYmd) {
65             this.initialDate = this.localDateFromYmd(this.initialYmd);
66
67         } else if (this.initialIso) {
68             this.initialDate = new Date(this.initialIso);
69         }
70
71         if (this.initialDate) {
72             this.current = {
73                 year: this.initialDate.getFullYear(),
74                 month: this.initialDate.getMonth() + 1,
75                 day: this.initialDate.getDate()
76             };
77         }
78     }
79
80     isValidDate(dt: NgbDateStruct): dt is NgbDateStruct {
81         return (<NgbDateStruct>dt).year !== undefined;
82     }
83
84     onDateEnter() {
85         if (this.current === null) {
86             this.onCleared.emit('cleared');
87         } else if (this.isValidDate(this.current)) {
88             this.onDateSelect(this.current);
89         }
90         // ignoring invalid input for now
91     }
92
93     onDateSelect(evt) {
94         const ymd = `${evt.year}-${String(evt.month).padStart(2, '0')}-${String(evt.day).padStart(2, '0')}`;
95         const date = this.localDateFromYmd(ymd);
96         const iso = date.toISOString();
97         this.onChangeAsDate.emit(date);
98         this.onChangeAsYmd.emit(ymd);
99         this.onChangeAsIso.emit(iso);
100     }
101
102     // Create a date in the local time zone with selected YMD values.
103     // TODO: Consider moving this to a date service...
104     localDateFromYmd(ymd: string): Date {
105         const parts = ymd.split('-');
106         return new Date(
107             Number(parts[0]), Number(parts[1]) - 1, Number(parts[2]));
108     }
109
110     reset() {
111         this.current = {
112             year: null,
113             month: null,
114             day: null
115         };
116     }
117
118 }
119
120