31 lines
835 B
TypeScript
31 lines
835 B
TypeScript
export type CachedServices = Record<string, unknown>;
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export type FactoryOptions = {
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alwaysInitializeNewService?: boolean;
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doNotStoreInitializedService?: boolean;
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[optionsKey: string]: unknown;
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};
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export async function factory<
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TCache extends CachedServices,
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TName extends keyof TCache,
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TOpts extends FactoryOptions
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>(
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cachedServices: TCache,
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name: TName,
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opts: TOpts,
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factory: () => TCache[TName] | Promise<TCache[TName]>
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): Promise<TCache[TName]> {
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let instance = cachedServices[name];
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if (opts.alwaysInitializeNewService || !instance) {
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const instanceOrPromise = factory();
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instance = instanceOrPromise instanceof Promise ? await instanceOrPromise : instanceOrPromise;
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}
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if (!opts.doNotStoreInitializedService) {
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cachedServices[name] = instance;
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}
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return instance as TCache[TName];
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}
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