ngx-timezones
Version:
An Angular module for timezones (based on moment.js)
163 lines • 19 kB
JavaScript
import { countryZones } from './ngx-timezones.data';
import { Component, Input, Output, EventEmitter, ChangeDetectorRef, } from '@angular/core';
import { FormControl } from '@angular/forms';
import * as moment from 'moment-timezone';
import { startWith, map } from 'rxjs/operators';
export class NgxTimezonesComponent {
constructor(cdRef) {
this.cdRef = cdRef;
this.timezoneCtrl = new FormControl();
this.searchControl = new FormControl();
this.timezoneChange = new EventEmitter();
this.guess = false;
this.showOffset = false;
this.placeholder = 'Select timezone';
this.searchPlaceholder = 'Search';
this.noResultsLabel = 'No results';
this.offsetName = 'UTC';
}
set timezone(timezone) {
this.timezoneCtrl.setValue(timezone);
}
set disabled(value) {
if (value) {
this.timezoneCtrl.disable();
}
else {
this.timezoneCtrl.enable();
}
}
ngOnInit() {
this.initData();
this.timezoneGroupsOptions = this.searchControl.valueChanges.pipe(startWith(''), map((query) => (query ? this.filter(query) : this.timezoneGroups.slice())));
this.timezoneCtrl.valueChanges.subscribe((value) => {
this.emitTimezone(value);
});
if (!this.timezoneCtrl.value && this.guess) {
this.guessedTimezone();
this.cdRef.detectChanges();
}
}
guessedTimezone() {
const zone = moment.tz.guess();
this.timezone = zone;
this.emitTimezone(zone);
}
emitTimezone(zone) {
this.timezoneChange.emit(zone);
}
initData() {
this.timezoneGroups = Object.keys(countryZones).map((iso) => {
const val = countryZones[iso];
const hasMultiple = val.zones.length > 1;
const zones = val.zones.map((x) => {
return hasMultiple
? {
zone: x,
name: `${this.formatTimezoneString(x)}`,
offset: this.offsetOfTimezone(x),
}
: {
zone: x,
name: val.name,
offset: this.offsetOfTimezone(x),
};
});
return { iso, country: val.name, zones };
});
}
filter(query) {
const result = [];
for (const z of this.timezoneGroups) {
if (z.country && z.country.toLowerCase().includes(query.toLowerCase())) {
result.push(z);
}
else {
const results = z.zones.filter((x) => x.name.toLowerCase().includes(query.toLowerCase()));
if (results.length > 0) {
z.zones = results;
z.showGroup = z.zones.length > 1;
result.push(z);
}
}
}
return result;
}
formatTimezoneString(zone) {
const arr = zone.split('/');
return arr[arr.length - 1].split('_').join(' ');
}
offsetOfTimezone(zone) {
let offset = moment.tz(zone).utcOffset();
const neg = offset < 0;
if (neg) {
offset = -1 * offset;
}
const hours = Math.floor(offset / 60);
const minutes = (offset / 60 - hours) * 60;
return `${neg ? '-' : '+'}${this.rjust(hours.toString(), 2)}:${this.rjust(minutes.toString(), 2)}`;
}
formatOffset(offset) {
return `(${this.offsetName}${offset})`;
}
rjust(value, width, padding = '0') {
padding = padding || ' ';
padding = padding.substr(0, 1);
if (value.length < width) {
return padding.repeat(width - value.length) + value;
}
else {
return value;
}
}
}
NgxTimezonesComponent.decorators = [
{ type: Component, args: [{
selector: 'ngx-timezones',
template: ` <mat-form-field style="width: 100%"
><mat-select [formControl]="timezoneCtrl" [placeholder]="placeholder">
<mat-option>
<ngx-mat-select-search
[formControl]="searchControl"
[placeholderLabel]="searchPlaceholder"
[noEntriesFoundLabel]="noResultsLabel"
></ngx-mat-select-search>
</mat-option>
<ng-template let-option ngFor [ngForOf]="timezoneGroupsOptions | async">
<mat-optgroup
*ngIf="option.showGroup || option.zones.length > 1; else singleOption"
[label]="option.country + ' (' + option.zones.length + ')'"
>
<mat-option *ngFor="let zone of option.zones" [value]="zone.zone">
{{ zone.name }}
<span>{{ showOffset ? formatOffset(zone.offset) : '' }}</span>
</mat-option>
</mat-optgroup>
<ng-template #singleOption>
<mat-option [value]="option.zones[0].zone">
{{ option.zones[0].name }}
<span>{{
showOffset ? formatOffset(option.zones[0].offset) : ''
}}</span>
</mat-option>
</ng-template>
</ng-template>
</mat-select>
</mat-form-field>`
},] }
];
NgxTimezonesComponent.ctorParameters = () => [
{ type: ChangeDetectorRef }
];
NgxTimezonesComponent.propDecorators = {
timezoneChange: [{ type: Output }],
timezone: [{ type: Input }],
disabled: [{ type: Input }],
guess: [{ type: Input }],
showOffset: [{ type: Input }],
placeholder: [{ type: Input }],
searchPlaceholder: [{ type: Input }],
noResultsLabel: [{ type: Input }],
offsetName: [{ type: Input }]
};
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{ countryZones } from './ngx-timezones.data';\nimport {\n  Component,\n  OnInit,\n  Input,\n  Output,\n  EventEmitter,\n  ChangeDetectorRef,\n} from '@angular/core';\nimport { FormControl } from '@angular/forms';\nimport { Observable } from 'rxjs';\nimport * as moment from 'moment-timezone';\nimport { startWith, map } from 'rxjs/operators';\n\ninterface TimezoneGroup {\n  country: string;\n  iso: string;\n  showGroup?: boolean;\n  zones: { zone: string; name: string; offset: string }[];\n}\n\n@Component({\n  selector: 'ngx-timezones',\n  template: ` <mat-form-field style=\"width: 100%\"\n    ><mat-select [formControl]=\"timezoneCtrl\" [placeholder]=\"placeholder\">\n      <mat-option>\n        <ngx-mat-select-search\n          [formControl]=\"searchControl\"\n          [placeholderLabel]=\"searchPlaceholder\"\n          [noEntriesFoundLabel]=\"noResultsLabel\"\n        ></ngx-mat-select-search>\n      </mat-option>\n      <ng-template let-option ngFor [ngForOf]=\"timezoneGroupsOptions | async\">\n        <mat-optgroup\n          *ngIf=\"option.showGroup || option.zones.length > 1; else singleOption\"\n          [label]=\"option.country + ' (' + option.zones.length + ')'\"\n        >\n          <mat-option *ngFor=\"let zone of option.zones\" [value]=\"zone.zone\">\n            {{ zone.name }}\n            <span>{{ showOffset ? formatOffset(zone.offset) : '' }}</span>\n          </mat-option>\n        </mat-optgroup>\n        <ng-template #singleOption>\n          <mat-option [value]=\"option.zones[0].zone\">\n            {{ option.zones[0].name }}\n            <span>{{\n              showOffset ? formatOffset(option.zones[0].offset) : ''\n            }}</span>\n          </mat-option>\n        </ng-template>\n      </ng-template>\n    </mat-select>\n  </mat-form-field>`,\n})\nexport class NgxTimezonesComponent implements OnInit {\n  timezoneCtrl = new FormControl();\n  timezoneGroups!: TimezoneGroup[];\n  timezoneGroupsOptions!: Observable<TimezoneGroup[]>;\n  searchControl = new FormControl();\n\n  @Output() timezoneChange = new EventEmitter<string>();\n\n  @Input() set timezone(timezone: string) {\n    this.timezoneCtrl.setValue(timezone);\n  }\n\n  @Input() set disabled(value: boolean) {\n    if (value) {\n      this.timezoneCtrl.disable();\n    } else {\n      this.timezoneCtrl.enable();\n    }\n  }\n\n  @Input() guess = false;\n\n  @Input() showOffset = false;\n  @Input() placeholder = 'Select timezone';\n  @Input() searchPlaceholder = 'Search';\n  @Input() noResultsLabel = 'No results';\n  @Input() offsetName = 'UTC';\n\n  constructor(private cdRef: ChangeDetectorRef) {}\n\n  ngOnInit(): void {\n    this.initData();\n    this.timezoneGroupsOptions = this.searchControl.valueChanges.pipe(\n      startWith(''),\n      map((query) => (query ? this.filter(query) : this.timezoneGroups.slice()))\n    );\n    this.timezoneCtrl.valueChanges.subscribe((value) => {\n      this.emitTimezone(value);\n    });\n\n    if (!this.timezoneCtrl.value && this.guess) {\n      this.guessedTimezone();\n      this.cdRef.detectChanges();\n    }\n  }\n\n  guessedTimezone(): void {\n    const zone = moment.tz.guess();\n    this.timezone = zone;\n    this.emitTimezone(zone);\n  }\n\n  emitTimezone(zone): void {\n    this.timezoneChange.emit(zone);\n  }\n\n  initData(): void {\n    this.timezoneGroups = Object.keys(countryZones).map((iso: string) => {\n      const val = countryZones[iso];\n      const hasMultiple = val.zones.length > 1;\n      const zones = val.zones.map((x) => {\n        return hasMultiple\n          ? {\n              zone: x,\n              name: `${this.formatTimezoneString(x)}`,\n              offset: this.offsetOfTimezone(x),\n            }\n          : {\n              zone: x,\n              name: val.name,\n              offset: this.offsetOfTimezone(x),\n            };\n      });\n      return { iso, country: val.name, zones };\n    });\n  }\n\n  filter(query: string): TimezoneGroup[] {\n    const result: TimezoneGroup[] = [];\n\n    for (const z of this.timezoneGroups) {\n      if (z.country && z.country.toLowerCase().includes(query.toLowerCase())) {\n        result.push(z);\n      } else {\n        const results = z.zones.filter((x) =>\n          x.name.toLowerCase().includes(query.toLowerCase())\n        );\n        if (results.length > 0) {\n          z.zones = results;\n          z.showGroup = z.zones.length > 1;\n          result.push(z);\n        }\n      }\n    }\n\n    return result;\n  }\n\n  formatTimezoneString(zone: string): string {\n    const arr = zone.split('/');\n    return arr[arr.length - 1].split('_').join(' ');\n  }\n\n  offsetOfTimezone(zone: string): string {\n    let offset = moment.tz(zone).utcOffset();\n    const neg = offset < 0;\n    if (neg) {\n      offset = -1 * offset;\n    }\n    const hours = Math.floor(offset / 60);\n    const minutes = (offset / 60 - hours) * 60;\n    return `${neg ? '-' : '+'}${this.rjust(hours.toString(), 2)}:${this.rjust(\n      minutes.toString(),\n      2\n    )}`;\n  }\n\n  formatOffset(offset: string): string {\n    return `(${this.offsetName}${offset})`;\n  }\n\n  private rjust(value: string, width: number, padding = '0'): string {\n    padding = padding || ' ';\n    padding = padding.substr(0, 1);\n    if (value.length < width) {\n      return padding.repeat(width - value.length) + value;\n    } else {\n      return value;\n    }\n  }\n}\n"]}