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import type { Invalidator, Subscriber, Unsubscriber } from 'svelte/store';
import type { Preference } from '../types';
import { writable, derived } from 'svelte/store';
type Nullable<T> = T | null;
interface User {
uuid: string;
username: string;
}
interface TokenStore {
subscribe: (run: Subscriber<Nullable<string>>, invalidate?: Invalidator<Nullable<string>>) => Unsubscriber,
authenticate: (newToken: string) => void,
unauthenticate: () => void
}
interface UserStore {
subscribe: (run: Subscriber<Nullable<User>>, invalidate?: Invalidator<Nullable<User>>) => Unsubscriber,
setUser: (user: User) => void,
reset: () => void
}
interface PreferenceStore {
subscribe: (run: Subscriber<Preference>, invalidate?: Invalidator<Preference>) => Unsubscriber,
set: (this: void, value: Preference) => void
}
function createTokenStore(): TokenStore {
const storedToken = localStorage.getItem("token");
const { subscribe, set } = writable<string | null>(storedToken);
function authenticate(newToken: string): void {
try {
localStorage.setItem("token", newToken);
set(newToken);
} catch (e) {
console.error('error', e);
}
}
function unauthenticate(): void {
localStorage.removeItem("token");
set(null);
}
return {
subscribe,
authenticate,
unauthenticate
};
}
function onTokenChange($token: Nullable<string>): boolean {
return $token ? true : false;
}
function createUserStore(): UserStore {
const user = localStorage.getItem('user');
const userObj: Nullable<User> = user ? JSON.parse(user) : null;
const { subscribe, set } = writable<User | null>(userObj);
const setUser = (user: User) => {
localStorage.setItem('user', JSON.stringify(user));
set(user);
}
const reset = () => {
localStorage.removeItem('user');
set(null);
}
return {
subscribe,
setUser,
reset
}
}
function createPreferenceStore(): PreferenceStore {
const preferences = localStorage.getItem('preferences');
const preferenceObj: Preference = preferences ? JSON.parse(preferences) : {
color: "#FF0000",
size: {
size: 16,
unit: 'oz'
}
};
const { subscribe, set } = writable<Preference>(preferenceObj);
return {
subscribe,
set
}
}
export const token = createTokenStore();
export const authenticated = derived(token, onTokenChange);
export const user = createUserStore();
export const preferences = createPreferenceStore();
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