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* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import {
booleanAttribute,
ChangeDetectionStrategy,
Component,
computed,
input,
OnChanges,
output,
signal,
SimpleChanges
} from '@angular/core';
import { FormsModule } from '@angular/forms';
import { SiNumberInputComponent } from '@siemens/element-ng/number-input';
import {
SelectOption,
SiSelectComponent,
SiSelectSimpleOptionsDirective,
SiSelectSingleValueDirective
} from '@siemens/element-ng/select';
import { t } from '@siemens/element-translate-ng/translate';
import { ONE_DAY, ONE_MINUTE } from './si-date-range-filter.types';
interface OffsetOption extends SelectOption<string> {
offset: number;
}
@Component({
selector: 'si-relative-date',
imports: [
FormsModule,
SiNumberInputComponent,
SiSelectComponent,
SiSelectSingleValueDirective,
SiSelectSimpleOptionsDirective
],
templateUrl: './si-relative-date.component.html',
styleUrl: './si-relative-date.component.scss',
changeDetection: ChangeDetectionStrategy.OnPush
})
export class SiRelativeDateComponent implements OnChanges {
/** @defaultValue 0 */
readonly value = input(0);
/** @defaultValue false */
readonly enableTimeSelection = input(false, { transform: booleanAttribute });
readonly valueLabel = input.required<string>();
readonly unitLabel = input.required<string>();
readonly valueChange = output<number>();
protected readonly internalValue = signal(0);
protected readonly offset = signal(0);
protected readonly unit = signal('days');
private readonly fullOffsetList: OffsetOption[] = [
{
type: 'option',
value: 'minutes',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.MINUTES:Minutes`),
offset: ONE_MINUTE
},
{
type: 'option',
value: 'hours',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.HOURS:Hours`),
offset: 60 * ONE_MINUTE
},
{
type: 'option',
value: 'days',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.DAYS:Days`),
offset: ONE_DAY
},
{
type: 'option',
value: 'weeks',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.WEEKS:Weeks`),
offset: 7 * ONE_DAY
},
{
type: 'option',
value: 'months',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.MONTHS:Months`),
offset: 30 * ONE_DAY
},
{
type: 'option',
value: 'years',
label: t(() => $localize`:@@SI_DATE_RANGE_FILTER.YEARS:Years`),
offset: 365 * ONE_DAY
}
];
protected readonly offsetList = computed(() =>
this.enableTimeSelection()
? this.fullOffsetList
: this.fullOffsetList.filter(item => item.offset >= ONE_DAY)
);
ngOnChanges(changes: SimpleChanges): void {
const value = this.value();
if (changes.value && value !== this.internalValue()) {
this.internalValue.set(value);
this.calculateOffset();
}
}
private calculateOffset(): void {
const offsetList = this.offsetList();
let unit = '';
if (offsetList.length) {
this.offset.set(0);
unit = offsetList[0].value;
}
for (let i = offsetList.length - 1; i >= 0; i--) {
const item = offsetList[i];
const raw = this.internalValue() / item.offset;
const rounded = Math.round(raw);
if (rounded > 0 && Math.abs(raw - rounded) < 0.001) {
this.offset.set(rounded);
unit = item.value;
break;
}
}
this.changeUnit(unit);
}
protected updateValue(offset: number): void {
this.offset.set(offset);
const item = this.offsetList().find(x => x.value === this.unit())!;
this.internalValue.set(offset * item.offset);
this.valueChange.emit(this.internalValue());
}
protected changeUnit(newUnit: string): void {
this.unit.set(newUnit);
const item = this.offsetList().find(x => x.value === this.unit())!;
this.offset.set(Math.max(1, Math.round(this.internalValue() / item.offset)));
this.internalValue.set(this.offset() * item.offset);
this.valueChange.emit(this.internalValue());
}
}
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