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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import { Component, ElementRef, Input, ViewChild } from '@angular/core';
import { DateTime } from 'luxon';
import { computeErrorTextPrefix } from '../utils/internal-utils';
import {
InvalidControlValue,
Nullable,
WidgetKeySet,
} from '../utils/util.types';
import { createWidgetKeySet, isInvalidControlValue } from '../utils/utilities';
import { BaseDateTimeComponent } from '../time-input/base-date-time.component';
interface DateFormula {
getDate: (text: string) => DateTime;
match: RegExp;
}
const ERROR_TEXT_INVALID_FORMAT = 'Falsches Eingabeformat';
const ERROR_TEXT_NONEXISTENT_DATE = 'Datum existiert nicht';
const DATE_FORMAT = 'dd.MM.yyyy';
const SUPPORTED_FORMATS = [
{
format: 'dd.MM.yyyy',
regex: /^\d{2}\.\d{2}\.\d{4}$/,
},
{
format: 'ddMM',
regex: /^\d{4}$/,
},
{
format: 'ddMMyyyy',
regex: /^\d{8}$/,
},
{
format: 'd.M.',
regex: /^\d\.\d\.$/,
},
{
format: 'd.MM.',
regex: /^\d\.\d{2}\.$/,
},
{
format: 'dd.M.',
regex: /^\d{2}\.\d\.$/,
},
{
format: 'dd.MM.',
regex: /^\d{2}\.\d{2}\.$/,
},
{
format: 'd.M.yyyy',
regex: /^\d\.\d\.\d{4}$/,
},
{
format: 'dd.M.yyyy',
regex: /^\d{2}\.\d\.\d{4}$/,
},
{
format: 'd.MM.yyyy',
regex: /^\d\.\d{2}\.\d{4}$/,
},
{
format: 'yyyy-MM-dd',
regex: /^\d{4}-\d{2}-\d{2}$/,
},
];
const SUPPORTED_FORMULAS: DateFormula[] = [
{
getDate: (text: string) =>
DateTime.now().plus({ days: Number(text.slice(0, text.length - 1)) }),
match: /^(\d+)([tT])$/,
},
{
getDate: (text: string) =>
DateTime.now().plus({ weeks: Number(text.slice(0, text.length - 1)) }),
match: /^(\d+)([wW])$/,
},
{
getDate: (text: string) =>
DateTime.now().plus({ months: Number(text.slice(0, text.length - 1)) }),
match: /^(\d+)([mM])$/,
},
{
getDate: (text: string) =>
DateTime.now().plus({ years: Number(text.slice(0, text.length - 1)) }),
match: /^(\d+)([jJ])$/,
},
{
getDate: () => DateTime.now(),
match: /^h$/,
},
{
getDate: () => DateTime.now().minus({ days: 1 }),
match: /^g$/,
},
{
getDate: () => DateTime.now().plus({ days: 1 }),
match: /^m$/,
},
];
/**
* A Date input component that allows the user to type in or select a date from the calendar.
*/
@Component({
selector: 'gc-date-input',
templateUrl: './date-input.component.html',
styleUrls: [
'../base-range-input-field/base-slot-mode.css',
'./date-input.component.css',
],
})
export class DateInputComponent extends BaseDateTimeComponent {
// maximum input length - equals the length of a fully formatted (local) date
public static readonly _INPUT_MAX_LENGTH = 10;
/**
* Overrides the default text which is shown when the control is readonly and empty.
*/
@Input()
public readonlyEmptyValue = '';
/** @ignore */
@Input()
public _sizeHelperValue = '';
/** @ignore */
@ViewChild('input')
protected _inputElement!: ElementRef<HTMLInputElement>;
/**
* Current value of the date input, in ISO 8601 format.
*/
@Input()
public override get value(): Nullable<string | InvalidControlValue> {
return super.value;
}
public override set value(value: Nullable<string | InvalidControlValue>) {
super.value = value;
if (isInvalidControlValue(value)) {
this.text = value.rawValue;
this.internalErrorMessage = this.generateErrorMsg(value.rawValue);
} else if (value !== null) {
const d = DateTime.fromISO(value);
this.text = d.toFormat(DATE_FORMAT);
this.internalErrorMessage = '';
} else {
this.text = '';
this.internalErrorMessage = '';
}
this.onInputChange.emit(this.text);
}
/**
* @ignore
* Helper to access static property in an Angular binding.
*/
public get maxLength() {
return DateInputComponent._INPUT_MAX_LENGTH;
}
/** @ignore */
protected get inputElement(): ElementRef<HTMLInputElement> {
return this._inputElement;
}
/** @ignore */
protected readonly _widgetKeys: WidgetKeySet = createWidgetKeySet('gc-date');
/**
* displayed on readonly when readonlyEmptyValue is empty
* @ignore
*/
protected readonly READONLY_DEFAULT_EMPTY_VALUE = '\u2013';
/**
* @ignore
*/
protected updateValue(text: string): void {
if (text === '') {
this.value = null;
} else {
const computedDateFromText = this.computeTextToDate(text);
const date =
computedDateFromText ?? DateTime.fromFormat(text, DATE_FORMAT);
const dateISO = date.toISODate();
// check whether the date will be represented in expanded ISO format,
// years which require more than 4 digits would require an additional prefix ('+/-')
// with an exchangeable interpretation (e.g. Luxon library simply adds the prefix and continues counting)
// -> as we don't need to support such distant dates large values which would
// require special handling/interpretation are considered invalid
// see ISO 8601:2004, 3.5
const dateISOExpanded = date.year > 9999 || date.year < 0;
if (date.isValid && !dateISOExpanded) {
this.value = dateISO;
} else {
this.value = {
kind: 'InvalidControlInput',
rawValue: text,
errorMessage: this.generateErrorMsg(text),
};
// error message updated automatically in 'value' setter
}
}
}
/** @ignore */
protected getLabelId(): string {
return this._widgetKeys.labelKey;
}
/** @ignore */
protected getInputId(): string {
return this._widgetKeys.widgetKey;
}
/** @ignore */
protected computeAriaDescribedBy(): string | null {
return this._infoMessageId ?? null;
}
/** @ignore */
protected sizeHelperText(): string {
if (this.readonly && this.text.length === 0) {
if (this.readonlyEmptyValue === '') {
return this.READONLY_DEFAULT_EMPTY_VALUE;
} else {
return this.readonlyEmptyValue;
}
} else if (this._sizeHelperValue) {
return this._sizeHelperValue;
} else {
return this.text;
}
}
/**
* @ignore
*/
private computeTextToDate(text: string): DateTime | undefined {
const foundFormula = this.findFormula(text);
return foundFormula
? foundFormula.getDate(text)
: this.computeDateFromTextFormat(text);
}
/**
* @ignore
*/
private findFormula(text: string): DateFormula | undefined {
return SUPPORTED_FORMULAS.find(
i => i.match.exec(text.toLowerCase())?.input,
);
}
/**
* @ignore
*/
private computeDateFromTextFormat(text: string): DateTime | undefined {
const foundFormat = SUPPORTED_FORMATS.find(
i => i.regex.exec(text)?.input,
)?.format;
return foundFormat ? DateTime.fromFormat(text, foundFormat) : undefined;
}
/**
* @ignore
*/
private generateErrorMsg(inputValue: string): string {
const errorPrefix = computeErrorTextPrefix(
this.label,
this._slotElementMode,
'Datum',
);
const errorMessage = this.computeDateFromTextFormat(inputValue)
? ERROR_TEXT_NONEXISTENT_DATE
: ERROR_TEXT_INVALID_FORMAT;
return errorPrefix + errorMessage;
}
}
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