44 lines
1.3 KiB
TypeScript
44 lines
1.3 KiB
TypeScript
import {UIEventSource} from "../UIEventSource";
|
|
|
|
/**
|
|
* UIEventsource-wrapper around localStorage
|
|
*/
|
|
export class LocalStorageSource {
|
|
|
|
static GetParsed<T>(key: string, defaultValue: T): UIEventSource<T> {
|
|
return LocalStorageSource.Get(key).map(
|
|
str => {
|
|
if (str === undefined) {
|
|
return defaultValue
|
|
}
|
|
try {
|
|
return JSON.parse(str)
|
|
} catch {
|
|
return defaultValue
|
|
}
|
|
}, [],
|
|
value => JSON.stringify(value)
|
|
)
|
|
}
|
|
|
|
static Get(key: string, defaultValue: string = undefined): UIEventSource<string> {
|
|
try {
|
|
const saved = localStorage.getItem(key);
|
|
const source = new UIEventSource<string>(saved ?? defaultValue, "localstorage:" + key);
|
|
|
|
source.addCallback((data) => {
|
|
try {
|
|
localStorage.setItem(key, data);
|
|
} catch (e) {
|
|
// Probably exceeded the quota with this item!
|
|
// Lets nuke everything
|
|
localStorage.clear()
|
|
}
|
|
|
|
});
|
|
return source;
|
|
} catch (e) {
|
|
return new UIEventSource<string>(defaultValue);
|
|
}
|
|
}
|
|
}
|