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/**
* Here be dragons!
*
* If you need to remove a listener use {@link RibbonStorage.off}
* to reset all listeners use {@link RibbonStorage.reset}
* @private
*/
static $listeners: RibbonStorage.Listeners = {
change: [],
};
static {
if ('window' in globalThis) {
// Picks up localStorage changes from other tabs
window.addEventListener('storage', (event) => {
if (event.key === null) return;
RibbonStorage.$emit('change', {
type: event.storageArea === localStorage ? 'local' : 'session',
key: event.key,
value: event.newValue === null ? null : JSON.parse(event.newValue),
});
});
}
}
static get<T>(storage: globalThis.Storage, key: string, defaultValue: T): T;
static get<T>(storage: globalThis.Storage, key: string, defaultValue?: T): T | null;
static get<T>(storage: globalThis.Storage, key: string, defaultValue?: T): T | null {
try {
const value = storage.getItem(key);
if (!value) return defaultValue ?? null;
return JSON.parse(value);
} catch {
return defaultValue ?? null;
}
}
static set<T>(storage: globalThis.Storage, key: string, value: T): void {
const type = storage === localStorage ? 'local' : 'session';
if (value === undefined || value === null) {
storage.removeItem(key);
RibbonStorage.$emit('change', {
type,
key,
value: null,
});
} else {
storage.setItem(key, JSON.stringify(value));
RibbonStorage.$emit('change', {
type,
key,
value,
});
}
}
static on<K extends keyof RibbonStorage.Listeners>(key: K, listener: RibbonStorage.Listeners[K][number]): void {
const index = RibbonStorage.$listeners[key].indexOf(listener);
if (index !== -1) return;
RibbonStorage.$listeners[key].push(listener);
}
static off<K extends keyof RibbonStorage.Listeners>(key: K, listener: RibbonStorage.Listeners[K][number]): void {
const index = RibbonStorage.$listeners[key].indexOf(listener);
if (index === -1) return;
RibbonStorage.$listeners[key].splice(index, 1);
}
/**
* Here be dragons! This should never be called externally!
* @private
*/
static $emit<K extends keyof RibbonStorage.Listeners>(
key: K,
...args: Parameters<RibbonStorage.Listeners[K][number]>
): void {
const [event] = args;
for (const listener of RibbonStorage.$listeners[key]) {
listener.apply(undefined, args);
}
switch (event.type) {
case 'local':
RibbonStorage.local.$emit(key, ...args);
break;
case 'session':
RibbonStorage.session.$emit(key, ...args);
break;
}
}
/**
* Resets RibbonStorage to a fresh state.
* Clearing out listeners and what not.
*/
static reset() {
RibbonStorage.$listeners = {
change: [],
};
RibbonStorage.local.reset();
RibbonStorage.session.reset();
}
/**
* Clears local and session storage.
*/
static clear() {
localStorage.clear();
sessionStorage.clear();
}
/**
* Shorthands for getting / setting from {@link localStorage}
*/
static local: RibbonStorage.SubStorage = {
$listeners: {
change: [],
},
get: <T>(key: string, defaultValue?: T) => RibbonStorage.get(localStorage, key, defaultValue),
set: <T>(key: string, value: T) => RibbonStorage.set(localStorage, key, value),
on(key, listener) {
const index = RibbonStorage.local.$listeners[key].indexOf(listener);
if (index !== -1) return;
RibbonStorage.local.$listeners[key].push(listener);
},
off(key, listener) {
const index = RibbonStorage.local.$listeners[key].indexOf(listener);
if (index === -1) return;
RibbonStorage.local.$listeners[key].splice(index, 1);
},
reset() {
RibbonStorage.local.$listeners = {
change: [],
};
},
$emit(key, ...args) {
for (const listener of RibbonStorage.local.$listeners[key]) {
listener.apply(undefined, args);
}
},
};
/**
* Shorthands for getting / setting from {@link sessionStorage}
*/
static session: RibbonStorage.SubStorage = {
/**
* Here be dragons!
*
* If you need to remove a listener use {@link RibbonStorage.off}
* to reset all listeners use {@link RibbonStorage.reset}
* @private
*/
$listeners: {
change: [],
},
get: <T>(key: string, defaultValue?: T) => RibbonStorage.get(sessionStorage, key, defaultValue),
set: <T>(key: string, value: T) => RibbonStorage.set(sessionStorage, key, value),
on(key, listener) {
const index = RibbonStorage.session.$listeners[key].indexOf(listener);
if (index !== -1) return;
RibbonStorage.session.$listeners[key].push(listener);
},
off(key, listener) {
const index = RibbonStorage.session.$listeners[key].indexOf(listener);
if (index === -1) return;
RibbonStorage.session.$listeners[key].splice(index, 1);
},
reset() {
RibbonStorage.session.$listeners = {
change: [],
};
},
$emit(key, ...args) {
for (const listener of RibbonStorage.session.$listeners[key]) {
listener.apply(undefined, args);
}
},
};
}
export namespace RibbonStorage {
export type Listeners = {
change: ((event: ChangeEvent) => void)[];
};
export type ChangeEvent = {
type: 'local' | 'session';
key: string;
/**
* This will always be the _parsed_ value!
*/
value: any;
};
export type SubStorage = {
$listeners: Listeners;
on<K extends keyof Listeners>(key: K, listener: Listeners[K][number]): void;
off<K extends keyof Listeners>(key: K, listener: Listeners[K][number]): void;
get<T>(key: string, defaultValue: T): T;
get<T>(key: string, defaultValue?: T): T | null;
get<T>(key: string, defaultValue?: T): T | null;
set<T>(key: string, value: T): void;
reset(): void;
/**
* Here be dragons! This should never be called externally!
* @private
*/
$emit<K extends keyof Listeners>(key: K, ...args: Parameters<Listeners[K][number]>): void;
};
}
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