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import { writable as _writable, readable as _readable, } from "svelte/store";
import type { Writable, Readable, StartStopNotifier } from "svelte/store";
enum StoreType {
SESSION = 0,
LOCAL = 1
}
interface StoreOptions {
store?: StoreType;
}
const default_store_options = {
store: StoreType.SESSION
} as StoreOptions;
interface WritableStore<T> {
name: string,
initialState: T,
options?: StoreOptions
}
interface ReadableStore<T> {
name: string,
initialState: T,
callback: StartStopNotifier<any>,
options?: StoreOptions
}
function get_store(type: StoreType): Storage {
switch (type) {
case StoreType.SESSION:
return window.sessionStorage;
case StoreType.LOCAL:
return window.localStorage;
}
}
function prepared_store_value(value: any): string {
try {
return JSON.stringify(value);
} catch (e) {
console.error(e);
return "__INVALID__";
}
}
function get_store_value<T>(options: WritableStore<T> | ReadableStore<T>): any {
try {
const storage = get_store(options.options.store);
const value = storage.getItem(options.name);
if (!value) return false;
return JSON.parse(value);
} catch (e) {
console.error(e);
return { __INVALID__: true };
}
}
function hydrate<T>(store: Writable<T>, options: WritableStore<T> | ReadableStore<T>): void {
const value = get_store_value<T>(options);
if (value && store.set) store.set(value);
}
function subscribe<T>(store: Writable<T> | Readable<T>, options: WritableStore<T> | ReadableStore<T>): void {
const storage = get_store(options.options.store);
if (!store.subscribe) return;
store.subscribe((state: any) => {
storage.setItem(options.name, prepared_store_value(state));
});
}
function writable_persistent<T>(options: WritableStore<T>): Writable<T> {
if (options.options === undefined) options.options = default_store_options;
console.log("Creating writable store with options: ", options);
const store = _writable<T>(options.initialState);
hydrate(store, options);
subscribe(store, options);
return store;
}
function readable_persistent<T>(options: ReadableStore<T>): Readable<T> {
if (options.options === undefined) options.options = default_store_options;
console.log("Creating readable store with options: ", options);
const store = _readable<T>(options.initialState, options.callback);
// hydrate(store, options);
subscribe(store, options);
return store;
}
export {
writable_persistent,
readable_persistent,
StoreType
};
export type {
WritableStore,
ReadableStore,
StoreOptions
};
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