Class PersistentState

src/platform/common/persistentState.ts:11–39

 * Used to store values that survive the lifetime of the extension.
 */
export class PersistentState<T> implements IPersistentState<T> {
    constructor(
        private storage: Memento,
        private key: string,
        private defaultValue?: T,
        private expiryDurationMs?: number
    ) {}

    public get value(): T {
        if (this.expiryDurationMs) {
            const cachedData = this.storage.get<{ data?: T; expiry?: number }>(this.key, { data: this.defaultValue! });
            if (!cachedData || !cachedData.expiry || cachedData.expiry < Date.now()) {
                return this.defaultValue!;
            } else {
                return cachedData.data!;
            }
        } else {
            return this.storage.get<T>(this.key, this.defaultValue!);
        }
    }

    public async updateValue(newValue: T): Promise<void> {
        if (this.expiryDurationMs) {
            await this.storage.update(this.key, { data: newValue, expiry: Date.now() + this.expiryDurationMs });
        } else {
            await this.storage.update(this.key, newValue);
        }
    }
}

@injectable()
export class PersistentStateFactory implements IPersistentStateFactory {