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import { ICU4XDataProvider, ICU4XDateLength, ICU4XDateTime, ICU4XDateTimeFormatter, ICU4XLocale, ICU4XTimeLength, ICU4XCalendar } from "icu4x";
import { Ok, Result, result, unwrap } from "./index";
export class DateTimeDemo {
#displayFn: (formatted: string) => void;
#dataProvider: ICU4XDataProvider;
#localeStr: string;
#calendarStr: string;
#dateTimeStr: string;
#locale: Result<ICU4XLocale>;
#calendar: Result<ICU4XCalendar>;
#dateLength: ICU4XDateLength;
#timeLength: ICU4XTimeLength;
#formatter: Result<ICU4XDateTimeFormatter>;
#dateTime: Result<ICU4XDateTime> | null;
constructor(displayFn: (formatted: string) => void, dataProvider: ICU4XDataProvider) {
this.#displayFn = displayFn;
this.#dataProvider = dataProvider;
this.#locale = Ok(ICU4XLocale.create_from_string("en"));
this.#calendar = Ok(ICU4XCalendar.create_for_locale(dataProvider, unwrap(this.#locale)));
this.#dateLength = ICU4XDateLength.Short;
this.#timeLength = ICU4XTimeLength.Short;
this.#dateTime = null;
this.#dateTimeStr = "";
this.#calendarStr = "from-locale";
this.#localeStr = "en";
this.#updateFormatter();
}
setCalendar(calendar: string): void {
this.#calendarStr = calendar;
this.#updateLocaleAndCalendar();
this.#updateFormatter();
}
setLocale(locid: string): void {
this.#localeStr = locid;
this.#updateLocaleAndCalendar();
this.#updateFormatter();
}
#updateLocaleAndCalendar(): void {
let locid = this.#localeStr;
if (this.#calendarStr != "from-locale") {
if (locid.indexOf("-u-") == -1) {
locid = `${locid}-u-ca-${this.#calendarStr}`;
} else {
// Don't bother trying to patch up the situation where a calendar
// is already specified; this is GIGO and the current locale parsing behavior
// will just default to the first one (#calendarStr)
locid = locid.replace("-u-", `-u-ca-${this.#calendarStr}-`);
}
}
this.#locale = result(() => ICU4XLocale.create_from_string(locid));
this.#calendar = result(() => ICU4XCalendar.create_for_locale(this.#dataProvider, unwrap(this.#locale) ));
this.#updateDateTime();
}
setDateLength(dateLength: string): void {
this.#dateLength = ICU4XDateLength[dateLength];
this.#updateFormatter()
}
setTimeLength(timeLength: string): void {
this.#timeLength = ICU4XTimeLength[timeLength];
this.#updateFormatter()
}
setDateTime(dateTime: string): void {
this.#dateTimeStr = dateTime;
this.#updateDateTime();
this.#render()
}
#updateDateTime(): void {
const date = new Date(this.#dateTimeStr);
this.#dateTime = result(() => ICU4XDateTime.create_from_iso_in_calendar(
date.getFullYear(),
date.getMonth() + 1,
date.getDate(),
date.getHours(),
date.getMinutes(),
date.getSeconds(),
0,
unwrap(this.#calendar)
));
}
#updateFormatter(): void {
this.#formatter = result(() => ICU4XDateTimeFormatter.create_with_lengths(
this.#dataProvider,
unwrap(this.#locale),
this.#dateLength,
this.#timeLength,
));
this.#render();
}
#render(): void {
try {
const formatter = unwrap(this.#formatter);
if (this.#dateTime !== null) {
const dateTime = unwrap(this.#dateTime);
this.#displayFn(formatter.format_datetime(dateTime));
} else {
this.#displayFn("");
}
} catch (e) {
if (e.error_value) {
this.#displayFn(`ICU4X Error: ${e.error_value}`);
} else {
this.#displayFn(`Unexpected Error: ${e}`);
}
}
}
}
export function setup(dataProvider: ICU4XDataProvider): void {
const formattedDateTime = document.getElementById('dtf-formatted') as HTMLInputElement;
const dateTimeDemo = new DateTimeDemo((formatted) => formattedDateTime.innerText = formatted, dataProvider);
const otherLocaleBtn = document.getElementById('dtf-locale-other') as HTMLInputElement | null;
otherLocaleBtn?.addEventListener('click', () => {
dateTimeDemo.setLocale(otherLocaleInput.value);
});
const otherLocaleInput = document.getElementById('dtf-locale-other-input') as HTMLInputElement | null;
otherLocaleInput?.addEventListener('input', () => {
const otherLocaleBtn = document.getElementById('dtf-locale-other') as HTMLInputElement | null;
if (otherLocaleBtn != null) {
otherLocaleBtn.checked = true;
dateTimeDemo.setLocale(otherLocaleInput.value);
}
});
for (let input of document.querySelectorAll<HTMLInputElement | null>('input[name="dtf-locale"]')) {
if (input?.value !== 'other') {
input.addEventListener('input', () => {
dateTimeDemo.setLocale(input.value)
});
}
}
for (let selector of document.querySelectorAll<HTMLSelectElement | null>('select[name="dtf-calendar"]')) {
// <select> doesn't have oninput
selector?.addEventListener('change', () => {
dateTimeDemo.setCalendar(selector.value)
});
}
for (let input of document.querySelectorAll<HTMLInputElement | null>('input[name="dtf-date-length"]')) {
input?.addEventListener('input', () => {
dateTimeDemo.setDateLength(input.value)
});
}
for (let input of document.querySelectorAll<HTMLInputElement | null>('input[name="dtf-time-length"]')) {
input?.addEventListener('input', () => {
dateTimeDemo.setTimeLength(input.value)
});
}
const inputDateTime = document.getElementById('dtf-input') as HTMLInputElement | null;
inputDateTime?.addEventListener('input', () => {
dateTimeDemo.setDateTime(inputDateTime.value)
});
// Annoyingly `toISOString()` gets us the format we need, but it converts to UTC first
// We instead get the current datetime and recast it to a date that is the current datetime
// when represented in UTC
let now = new Date();
const offset = now.getTimezoneOffset();
now.setMinutes(now.getMinutes() - offset);
const nowISO = now.toISOString().slice(0,16);
if (inputDateTime != undefined) {
// this seems like the best way to get something compatible with inputDateTIme
inputDateTime.value = nowISO;
}
dateTimeDemo.setDateTime(nowISO);
}
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