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const LOCALE_STORAGE_KEY = "locale";
const AVAILABLE_LOCALES = ["en", "nb"];
class WebStorageBackedCache {
#key;
#staleAfter;
#dataRetriever;
#storage;
constructor(key, staleAfter, dataRetriever, storage = window.sessionStorage) {
this.#key = key;
this.#staleAfter = staleAfter;
this.#dataRetriever = dataRetriever;
this.#storage = storage;
if (this.#shouldUpdate()) {
(async () => {
this.set(await this.#dataRetriever());
})();
}
}
#shouldUpdate(set_at) {
if (!set_at) {
return true;
}
if (this.#staleAfter === -1) {
return false;
}
return (set_at + this.#staleAfter) < Temporal.Now.instant().epochSeconds;
}
async get() {
const stringVal = this.#storage.getItem(this.#key);
if (!stringVal) {
return undefined;
}
const data = JSON.parse(stringVal);
if (this.#shouldUpdate(data.set_at)) {
const newData = await this.#dataRetriever();
this.set(newData);
return newData;
}
return data.value;
}
get_sync() {
const stringVal = this.#storage.getItem(this.#key);
if (!stringVal) {
return undefined;
}
return JSON.parse(stringVal).value;
}
set(data) {
this.#storage.setItem(this.#key, JSON.stringify({
set_at: Temporal.Now.instant().epochSeconds,
value: data
}));
}
clear() {
this.#storage.removeItem(session._storageKey);
}
}
const api = {
async _fetch(input, init = undefined) {
const r = new Request(input);
r.credentials = "include";
r.headers.append("x-tz", Temporal.Now.timeZoneId());
if (init?.method) {
r.method = init.method;
}
if (init?.body) {
r.body = init.body;
}
if (init?.headers) {
for (const [key, value] of Object.entries(init.headers)) {
r.headers.set(key, value);
}
}
const response = await fetch(r);
if (response.status === 401) {
session.clear();
if (!location.pathname.startsWith("/login")) {
location.href = "/login?reason=401";
}
}
return response;
},
get_session_async() {
return api._fetch("/session");
},
get_translation_async(locale) {
if (!locale) {
return;
}
return fetch("/translations/" + locale + ".json");
},
account: {
login_async(payload) {
return fetch("/account/login", {
method: "post",
body: JSON.stringify(payload),
headers: {
"Content-Type": "application/json;charset=utf-8"
}
});
},
logout_async() {
return api._fetch("/account/logout");
},
delete_account_async() {
return api._fetch("/account/delete", {
method: "delete",
});
}
}
};
async function logout_and_exit() {
session.clear();
await api.account.logout_async();
location.href = "/login?reason=logged_out";
}
function set_locale_iso(val) {
if (!AVAILABLE_LOCALES.includes(val)) {
console.error(val + " is not a valid locale");
return;
}
localStorage.setItem(LOCALE_STORAGE_KEY, val);
}
function current_locale_iso() {
const localeStorageValue = localStorage.getItem(LOCALE_STORAGE_KEY) ?? undefined;
if (localeStorageValue && AVAILABLE_LOCALES.includes(localeStorageValue)) {
return localeStorageValue;
}
return "en";
}
const session = new WebStorageBackedCache("session_data", 3600, async () => {
const response = await api.get_session_async();
if (!response.ok) {
return {};
}
return json_or_default_async(response, {});
});
const translationData = new WebStorageBackedCache("translation_" + current_locale_iso(), -1, async () => {
return json_or_default_async(await api.get_translation_async(current_locale_iso()), {});
});
function deepFind(obj, path, keySeparator = ".") {
if (!obj) {
return undefined;
}
if (obj[path]) {
return obj[path];
}
const tokens = path.split(keySeparator);
let current = obj;
for (let i = 0; i < tokens.length;) {
if (!current || typeof current !== "object") {
return undefined;
}
let next;
let nextPath = "";
for (let j = i; j < tokens.length; ++j) {
if (j !== i) {
nextPath += keySeparator;
}
nextPath += tokens[j];
next = current[nextPath];
if (next !== undefined) {
if (["string", "number", "boolean"].indexOf(typeof next) > -1 && j < tokens.length - 1) {
continue;
}
i += j - i + 1;
break;
}
}
current = next;
}
return current;
}
function t(key, args = undefined) {
if (!key) {
return undefined;
}
const res = deepFind(translationData.get_sync(), key);
if (!args || typeof args !== "object") {
return res;
}
return res.replace(
/{(\w+)}/g,
(placeholderWithDelimiters, placeholderWithoutDelimiters) =>
args.hasOwnProperty(placeholderWithoutDelimiters)
? args[placeholderWithoutDelimiters]
: placeholderWithDelimiters
);
}
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